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-rw-r--r--mesalib/src/mesa/swrast/s_accum.c1196
-rw-r--r--mesalib/src/mesa/swrast/s_bitmap.c446
-rw-r--r--mesalib/src/mesa/swrast/s_context.c1812
-rw-r--r--mesalib/src/mesa/swrast/s_context.h696
-rw-r--r--mesalib/src/mesa/swrast/s_drawpix.c1506
-rw-r--r--mesalib/src/mesa/swrast/s_fog.c488
-rw-r--r--mesalib/src/mesa/swrast/s_fragprog.c554
-rw-r--r--mesalib/src/mesa/swrast/s_readpix.c1028
-rw-r--r--mesalib/src/mesa/swrast/s_texrender.c1308
-rw-r--r--mesalib/src/mesa/swrast/s_triangle.c2286
10 files changed, 5660 insertions, 5660 deletions
diff --git a/mesalib/src/mesa/swrast/s_accum.c b/mesalib/src/mesa/swrast/s_accum.c
index 2889d908b..0ec907d79 100644
--- a/mesalib/src/mesa/swrast/s_accum.c
+++ b/mesalib/src/mesa/swrast/s_accum.c
@@ -1,598 +1,598 @@
-/*
- * Mesa 3-D graphics library
- * Version: 6.5.2
- *
- * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-#include "main/glheader.h"
-#include "main/condrender.h"
-#include "main/context.h"
-#include "main/macros.h"
-#include "main/imports.h"
-
-#include "s_accum.h"
-#include "s_context.h"
-#include "s_masking.h"
-#include "s_span.h"
-
-
-/* XXX this would have to change for accum buffers with more or less
- * than 16 bits per color channel.
- */
-#define ACCUM_SCALE16 32767.0F
-
-
-/*
- * Accumulation buffer notes
- *
- * Normally, accumulation buffer values are GLshorts with values in
- * [-32767, 32767] which represent floating point colors in [-1, 1],
- * as defined by the OpenGL specification.
- *
- * We optimize for the common case used for full-scene antialiasing:
- * // start with accum buffer cleared to zero
- * glAccum(GL_LOAD, w); // or GL_ACCUM the first image
- * glAccum(GL_ACCUM, w);
- * ...
- * glAccum(GL_ACCUM, w);
- * glAccum(GL_RETURN, 1.0);
- * That is, we start with an empty accumulation buffer and accumulate
- * n images, each with weight w = 1/n.
- * In this scenario, we can simply store unscaled integer values in
- * the accum buffer instead of scaled integers. We'll also keep track
- * of the w value so when we do GL_RETURN we simply divide the accumulated
- * values by n (n=1/w).
- * This lets us avoid _many_ int->float->int conversions.
- */
-
-
-#if CHAN_BITS == 8
-/* enable the optimization */
-#define USE_OPTIMIZED_ACCUM 1
-#else
-#define USE_OPTIMIZED_ACCUM 0
-#endif
-
-
-/**
- * This is called when we fall out of optimized/unscaled accum buffer mode.
- * That is, we convert each unscaled accum buffer value into a scaled value
- * representing the range[-1, 1].
- */
-static void
-rescale_accum( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_renderbuffer *rb
- = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
- const GLfloat s = swrast->_IntegerAccumScaler * (32767.0F / CHAN_MAXF);
-
- assert(rb);
- assert(rb->_BaseFormat == GL_RGBA);
- /* add other types in future? */
- assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT);
- assert(swrast->_IntegerAccumMode);
-
- if (rb->GetPointer(ctx, rb, 0, 0)) {
- /* directly-addressable memory */
- GLuint y;
- for (y = 0; y < rb->Height; y++) {
- GLuint i;
- GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, 0, y);
- for (i = 0; i < 4 * rb->Width; i++) {
- acc[i] = (GLshort) (acc[i] * s);
- }
- }
- }
- else {
- /* use get/put row funcs */
- GLuint y;
- for (y = 0; y < rb->Height; y++) {
- GLshort accRow[MAX_WIDTH * 4];
- GLuint i;
- rb->GetRow(ctx, rb, rb->Width, 0, y, accRow);
- for (i = 0; i < 4 * rb->Width; i++) {
- accRow[i] = (GLshort) (accRow[i] * s);
- }
- rb->PutRow(ctx, rb, rb->Width, 0, y, accRow, NULL);
- }
- }
-
- swrast->_IntegerAccumMode = GL_FALSE;
-}
-
-
-
-/**
- * Clear the accumulation Buffer.
- */
-void
-_swrast_clear_accum_buffer( struct gl_context *ctx, struct gl_renderbuffer *rb )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLuint x, y, width, height;
-
- /* No accumulation buffer! Not an error. */
- if (!rb || !rb->Data)
- return;
-
- assert(rb->_BaseFormat == GL_RGBA);
- /* add other types in future? */
- assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT);
-
- /* bounds, with scissor */
- x = ctx->DrawBuffer->_Xmin;
- y = ctx->DrawBuffer->_Ymin;
- width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
- height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
-
- if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
- const GLfloat accScale = 32767.0;
- GLshort clearVal[4];
- GLuint i;
-
- clearVal[0] = (GLshort) (ctx->Accum.ClearColor[0] * accScale);
- clearVal[1] = (GLshort) (ctx->Accum.ClearColor[1] * accScale);
- clearVal[2] = (GLshort) (ctx->Accum.ClearColor[2] * accScale);
- clearVal[3] = (GLshort) (ctx->Accum.ClearColor[3] * accScale);
-
- for (i = 0; i < height; i++) {
- rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL);
- }
- }
- else {
- /* someday support other sizes */
- }
-
- /* update optimized accum state vars */
- if (ctx->Accum.ClearColor[0] == 0.0 && ctx->Accum.ClearColor[1] == 0.0 &&
- ctx->Accum.ClearColor[2] == 0.0 && ctx->Accum.ClearColor[3] == 0.0) {
-#if USE_OPTIMIZED_ACCUM
- swrast->_IntegerAccumMode = GL_TRUE;
-#else
- swrast->_IntegerAccumMode = GL_FALSE;
-#endif
- swrast->_IntegerAccumScaler = 0.0; /* denotes empty accum buffer */
- }
- else {
- swrast->_IntegerAccumMode = GL_FALSE;
- }
-}
-
-
-static void
-accum_add(struct gl_context *ctx, GLfloat value,
- GLint xpos, GLint ypos, GLint width, GLint height )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_renderbuffer *rb
- = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
-
- assert(rb);
-
- /* Leave optimized accum buffer mode */
- if (swrast->_IntegerAccumMode)
- rescale_accum(ctx);
-
- if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
- const GLshort incr = (GLshort) (value * ACCUM_SCALE16);
- if (rb->GetPointer(ctx, rb, 0, 0)) {
- GLint i, j;
- for (i = 0; i < height; i++) {
- GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
- for (j = 0; j < 4 * width; j++) {
- acc[j] += incr;
- }
- }
- }
- else {
- GLint i, j;
- for (i = 0; i < height; i++) {
- GLshort accRow[4 * MAX_WIDTH];
- rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow);
- for (j = 0; j < 4 * width; j++) {
- accRow[j] += incr;
- }
- rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL);
- }
- }
- }
- else {
- /* other types someday */
- }
-}
-
-
-static void
-accum_mult(struct gl_context *ctx, GLfloat mult,
- GLint xpos, GLint ypos, GLint width, GLint height )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_renderbuffer *rb
- = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
-
- assert(rb);
-
- /* Leave optimized accum buffer mode */
- if (swrast->_IntegerAccumMode)
- rescale_accum(ctx);
-
- if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
- if (rb->GetPointer(ctx, rb, 0, 0)) {
- GLint i, j;
- for (i = 0; i < height; i++) {
- GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
- for (j = 0; j < 4 * width; j++) {
- acc[j] = (GLshort) (acc[j] * mult);
- }
- }
- }
- else {
- GLint i, j;
- for (i = 0; i < height; i++) {
- GLshort accRow[4 * MAX_WIDTH];
- rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow);
- for (j = 0; j < 4 * width; j++) {
- accRow[j] = (GLshort) (accRow[j] * mult);
- }
- rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL);
- }
- }
- }
- else {
- /* other types someday */
- }
-}
-
-
-
-static void
-accum_accum(struct gl_context *ctx, GLfloat value,
- GLint xpos, GLint ypos, GLint width, GLint height )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_renderbuffer *rb
- = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
- const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);
-
- assert(rb);
-
- if (!ctx->ReadBuffer->_ColorReadBuffer) {
- /* no read buffer - OK */
- return;
- }
-
- /* May have to leave optimized accum buffer mode */
- if (swrast->_IntegerAccumScaler == 0.0 && value > 0.0 && value <= 1.0)
- swrast->_IntegerAccumScaler = value;
- if (swrast->_IntegerAccumMode && value != swrast->_IntegerAccumScaler)
- rescale_accum(ctx);
-
- if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
- const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;
- GLshort accumRow[4 * MAX_WIDTH];
- GLchan rgba[MAX_WIDTH][4];
- GLint i;
-
- for (i = 0; i < height; i++) {
- GLshort *acc;
- if (directAccess) {
- acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
- }
- else {
- rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);
- acc = accumRow;
- }
-
- /* read colors from color buffer */
- _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,
- xpos, ypos + i, CHAN_TYPE, rgba);
-
- /* do accumulation */
- if (swrast->_IntegerAccumMode) {
- /* simply add integer color values into accum buffer */
- GLint j;
- for (j = 0; j < width; j++) {
- acc[j * 4 + 0] += rgba[j][RCOMP];
- acc[j * 4 + 1] += rgba[j][GCOMP];
- acc[j * 4 + 2] += rgba[j][BCOMP];
- acc[j * 4 + 3] += rgba[j][ACOMP];
- }
- }
- else {
- /* scaled integer (or float) accum buffer */
- GLint j;
- for (j = 0; j < width; j++) {
- acc[j * 4 + 0] += (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);
- acc[j * 4 + 1] += (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);
- acc[j * 4 + 2] += (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);
- acc[j * 4 + 3] += (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);
- }
- }
-
- if (!directAccess) {
- rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);
- }
- }
- }
- else {
- /* other types someday */
- }
-}
-
-
-
-static void
-accum_load(struct gl_context *ctx, GLfloat value,
- GLint xpos, GLint ypos, GLint width, GLint height )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_renderbuffer *rb
- = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
- const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);
-
- assert(rb);
-
- if (!ctx->ReadBuffer->_ColorReadBuffer) {
- /* no read buffer - OK */
- return;
- }
-
- /* This is a change to go into optimized accum buffer mode */
- if (value > 0.0 && value <= 1.0) {
-#if USE_OPTIMIZED_ACCUM
- swrast->_IntegerAccumMode = GL_TRUE;
-#else
- swrast->_IntegerAccumMode = GL_FALSE;
-#endif
- swrast->_IntegerAccumScaler = value;
- }
- else {
- swrast->_IntegerAccumMode = GL_FALSE;
- swrast->_IntegerAccumScaler = 0.0;
- }
-
- if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
- const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;
- GLshort accumRow[4 * MAX_WIDTH];
- GLchan rgba[MAX_WIDTH][4];
- GLint i;
-
- for (i = 0; i < height; i++) {
- GLshort *acc;
- if (directAccess) {
- acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
- }
- else {
- rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);
- acc = accumRow;
- }
-
- /* read colors from color buffer */
- _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,
- xpos, ypos + i, CHAN_TYPE, rgba);
-
- /* do load */
- if (swrast->_IntegerAccumMode) {
- /* just copy values in */
- GLint j;
- assert(swrast->_IntegerAccumScaler > 0.0);
- assert(swrast->_IntegerAccumScaler <= 1.0);
- for (j = 0; j < width; j++) {
- acc[j * 4 + 0] = rgba[j][RCOMP];
- acc[j * 4 + 1] = rgba[j][GCOMP];
- acc[j * 4 + 2] = rgba[j][BCOMP];
- acc[j * 4 + 3] = rgba[j][ACOMP];
- }
- }
- else {
- /* scaled integer (or float) accum buffer */
- GLint j;
- for (j = 0; j < width; j++) {
- acc[j * 4 + 0] = (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);
- acc[j * 4 + 1] = (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);
- acc[j * 4 + 2] = (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);
- acc[j * 4 + 3] = (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);
- }
- }
-
- if (!directAccess) {
- rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);
- }
- }
- }
-}
-
-
-static void
-accum_return(struct gl_context *ctx, GLfloat value,
- GLint xpos, GLint ypos, GLint width, GLint height )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_framebuffer *fb = ctx->DrawBuffer;
- struct gl_renderbuffer *accumRb = fb->Attachment[BUFFER_ACCUM].Renderbuffer;
- const GLboolean directAccess
- = (accumRb->GetPointer(ctx, accumRb, 0, 0) != NULL);
-
- static GLchan multTable[32768];
- static GLfloat prevMult = 0.0;
- const GLfloat mult = swrast->_IntegerAccumScaler;
- const GLint max = MIN2((GLint) (256 / mult), 32767);
-
- /* May have to leave optimized accum buffer mode */
- if (swrast->_IntegerAccumMode && value != 1.0)
- rescale_accum(ctx);
-
- if (swrast->_IntegerAccumMode && swrast->_IntegerAccumScaler > 0) {
- /* build lookup table to avoid many floating point multiplies */
- GLint j;
- assert(swrast->_IntegerAccumScaler <= 1.0);
- if (mult != prevMult) {
- for (j = 0; j < max; j++)
- multTable[j] = IROUND((GLfloat) j * mult);
- prevMult = mult;
- }
- }
-
- if (accumRb->DataType == GL_SHORT ||
- accumRb->DataType == GL_UNSIGNED_SHORT) {
- const GLfloat scale = value * CHAN_MAXF / ACCUM_SCALE16;
- GLuint buffer;
- GLint i;
-
- /* XXX maybe transpose the 'i' and 'buffer' loops??? */
- for (i = 0; i < height; i++) {
- GLshort accumRow[4 * MAX_WIDTH];
- GLshort *acc;
- SWspan span;
-
- /* init color span */
- INIT_SPAN(span, GL_BITMAP);
- span.end = width;
- span.arrayMask = SPAN_RGBA;
- span.x = xpos;
- span.y = ypos + i;
-
- if (directAccess) {
- acc = (GLshort *) accumRb->GetPointer(ctx, accumRb, xpos, ypos +i);
- }
- else {
- accumRb->GetRow(ctx, accumRb, width, xpos, ypos + i, accumRow);
- acc = accumRow;
- }
-
- /* get the colors to return */
- if (swrast->_IntegerAccumMode) {
- GLint j;
- for (j = 0; j < width; j++) {
- ASSERT(acc[j * 4 + 0] < max);
- ASSERT(acc[j * 4 + 1] < max);
- ASSERT(acc[j * 4 + 2] < max);
- ASSERT(acc[j * 4 + 3] < max);
- span.array->rgba[j][RCOMP] = multTable[acc[j * 4 + 0]];
- span.array->rgba[j][GCOMP] = multTable[acc[j * 4 + 1]];
- span.array->rgba[j][BCOMP] = multTable[acc[j * 4 + 2]];
- span.array->rgba[j][ACOMP] = multTable[acc[j * 4 + 3]];
- }
- }
- else {
- /* scaled integer (or float) accum buffer */
- GLint j;
- for (j = 0; j < width; j++) {
-#if CHAN_BITS==32
- GLchan r = acc[j * 4 + 0] * scale;
- GLchan g = acc[j * 4 + 1] * scale;
- GLchan b = acc[j * 4 + 2] * scale;
- GLchan a = acc[j * 4 + 3] * scale;
-#else
- GLint r = IROUND( (GLfloat) (acc[j * 4 + 0]) * scale );
- GLint g = IROUND( (GLfloat) (acc[j * 4 + 1]) * scale );
- GLint b = IROUND( (GLfloat) (acc[j * 4 + 2]) * scale );
- GLint a = IROUND( (GLfloat) (acc[j * 4 + 3]) * scale );
-#endif
- span.array->rgba[j][RCOMP] = CLAMP( r, 0, CHAN_MAX );
- span.array->rgba[j][GCOMP] = CLAMP( g, 0, CHAN_MAX );
- span.array->rgba[j][BCOMP] = CLAMP( b, 0, CHAN_MAX );
- span.array->rgba[j][ACOMP] = CLAMP( a, 0, CHAN_MAX );
- }
- }
-
- /* store colors */
- for (buffer = 0; buffer < fb->_NumColorDrawBuffers; buffer++) {
- struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buffer];
- const GLboolean masking = (!ctx->Color.ColorMask[buffer][RCOMP] ||
- !ctx->Color.ColorMask[buffer][GCOMP] ||
- !ctx->Color.ColorMask[buffer][BCOMP] ||
- !ctx->Color.ColorMask[buffer][ACOMP]);
- if (masking) {
- _swrast_mask_rgba_span(ctx, rb, &span, buffer);
- }
- rb->PutRow(ctx, rb, width, xpos, ypos + i, span.array->rgba, NULL);
- }
- }
- }
- else {
- /* other types someday */
- }
-}
-
-
-
-/**
- * Software fallback for glAccum.
- */
-void
-_swrast_Accum(struct gl_context *ctx, GLenum op, GLfloat value)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLint xpos, ypos, width, height;
-
- if (swrast->NewState)
- _swrast_validate_derived( ctx );
-
- if (!ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer) {
- _mesa_warning(ctx, "Calling glAccum() without an accumulation buffer");
- return;
- }
-
- if (!_mesa_check_conditional_render(ctx))
- return;
-
- swrast_render_start(ctx);
-
- /* Compute region after calling swrast_render_start() so that we know the
- * drawbuffer's size/bounds are up to date.
- */
- xpos = ctx->DrawBuffer->_Xmin;
- ypos = ctx->DrawBuffer->_Ymin;
- width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
- height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
-
- switch (op) {
- case GL_ADD:
- if (value != 0.0F) {
- accum_add(ctx, value, xpos, ypos, width, height);
- }
- break;
- case GL_MULT:
- if (value != 1.0F) {
- accum_mult(ctx, value, xpos, ypos, width, height);
- }
- break;
- case GL_ACCUM:
- if (value != 0.0F) {
- accum_accum(ctx, value, xpos, ypos, width, height);
- }
- break;
- case GL_LOAD:
- accum_load(ctx, value, xpos, ypos, width, height);
- break;
- case GL_RETURN:
- accum_return(ctx, value, xpos, ypos, width, height);
- break;
- default:
- _mesa_problem(ctx, "invalid mode in _swrast_Accum()");
- break;
- }
-
- swrast_render_finish(ctx);
-}
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/condrender.h"
+#include "main/context.h"
+#include "main/macros.h"
+#include "main/imports.h"
+
+#include "s_accum.h"
+#include "s_context.h"
+#include "s_masking.h"
+#include "s_span.h"
+
+
+/* XXX this would have to change for accum buffers with more or less
+ * than 16 bits per color channel.
+ */
+#define ACCUM_SCALE16 32767.0F
+
+
+/*
+ * Accumulation buffer notes
+ *
+ * Normally, accumulation buffer values are GLshorts with values in
+ * [-32767, 32767] which represent floating point colors in [-1, 1],
+ * as defined by the OpenGL specification.
+ *
+ * We optimize for the common case used for full-scene antialiasing:
+ * // start with accum buffer cleared to zero
+ * glAccum(GL_LOAD, w); // or GL_ACCUM the first image
+ * glAccum(GL_ACCUM, w);
+ * ...
+ * glAccum(GL_ACCUM, w);
+ * glAccum(GL_RETURN, 1.0);
+ * That is, we start with an empty accumulation buffer and accumulate
+ * n images, each with weight w = 1/n.
+ * In this scenario, we can simply store unscaled integer values in
+ * the accum buffer instead of scaled integers. We'll also keep track
+ * of the w value so when we do GL_RETURN we simply divide the accumulated
+ * values by n (n=1/w).
+ * This lets us avoid _many_ int->float->int conversions.
+ */
+
+
+#if CHAN_BITS == 8
+/* enable the optimization */
+#define USE_OPTIMIZED_ACCUM 1
+#else
+#define USE_OPTIMIZED_ACCUM 0
+#endif
+
+
+/**
+ * This is called when we fall out of optimized/unscaled accum buffer mode.
+ * That is, we convert each unscaled accum buffer value into a scaled value
+ * representing the range[-1, 1].
+ */
+static void
+rescale_accum( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+ const GLfloat s = swrast->_IntegerAccumScaler * (32767.0F / CHAN_MAXF);
+
+ assert(rb);
+ assert(rb->_BaseFormat == GL_RGBA);
+ /* add other types in future? */
+ assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT);
+ assert(swrast->_IntegerAccumMode);
+
+ if (rb->GetPointer(ctx, rb, 0, 0)) {
+ /* directly-addressable memory */
+ GLuint y;
+ for (y = 0; y < rb->Height; y++) {
+ GLuint i;
+ GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, 0, y);
+ for (i = 0; i < 4 * rb->Width; i++) {
+ acc[i] = (GLshort) (acc[i] * s);
+ }
+ }
+ }
+ else {
+ /* use get/put row funcs */
+ GLuint y;
+ for (y = 0; y < rb->Height; y++) {
+ GLshort accRow[MAX_WIDTH * 4];
+ GLuint i;
+ rb->GetRow(ctx, rb, rb->Width, 0, y, accRow);
+ for (i = 0; i < 4 * rb->Width; i++) {
+ accRow[i] = (GLshort) (accRow[i] * s);
+ }
+ rb->PutRow(ctx, rb, rb->Width, 0, y, accRow, NULL);
+ }
+ }
+
+ swrast->_IntegerAccumMode = GL_FALSE;
+}
+
+
+
+/**
+ * Clear the accumulation Buffer.
+ */
+void
+_swrast_clear_accum_buffer( struct gl_context *ctx, struct gl_renderbuffer *rb )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint x, y, width, height;
+
+ /* No accumulation buffer! Not an error. */
+ if (!rb || !rb->Data)
+ return;
+
+ assert(rb->_BaseFormat == GL_RGBA);
+ /* add other types in future? */
+ assert(rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT);
+
+ /* bounds, with scissor */
+ x = ctx->DrawBuffer->_Xmin;
+ y = ctx->DrawBuffer->_Ymin;
+ width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+
+ if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLfloat accScale = 32767.0;
+ GLshort clearVal[4];
+ GLuint i;
+
+ clearVal[0] = (GLshort) (ctx->Accum.ClearColor[0] * accScale);
+ clearVal[1] = (GLshort) (ctx->Accum.ClearColor[1] * accScale);
+ clearVal[2] = (GLshort) (ctx->Accum.ClearColor[2] * accScale);
+ clearVal[3] = (GLshort) (ctx->Accum.ClearColor[3] * accScale);
+
+ for (i = 0; i < height; i++) {
+ rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL);
+ }
+ }
+ else {
+ /* someday support other sizes */
+ }
+
+ /* update optimized accum state vars */
+ if (ctx->Accum.ClearColor[0] == 0.0 && ctx->Accum.ClearColor[1] == 0.0 &&
+ ctx->Accum.ClearColor[2] == 0.0 && ctx->Accum.ClearColor[3] == 0.0) {
+#if USE_OPTIMIZED_ACCUM
+ swrast->_IntegerAccumMode = GL_TRUE;
+#else
+ swrast->_IntegerAccumMode = GL_FALSE;
+#endif
+ swrast->_IntegerAccumScaler = 0.0; /* denotes empty accum buffer */
+ }
+ else {
+ swrast->_IntegerAccumMode = GL_FALSE;
+ }
+}
+
+
+static void
+accum_add(struct gl_context *ctx, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+
+ assert(rb);
+
+ /* Leave optimized accum buffer mode */
+ if (swrast->_IntegerAccumMode)
+ rescale_accum(ctx);
+
+ if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLshort incr = (GLshort) (value * ACCUM_SCALE16);
+ if (rb->GetPointer(ctx, rb, 0, 0)) {
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
+ for (j = 0; j < 4 * width; j++) {
+ acc[j] += incr;
+ }
+ }
+ }
+ else {
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLshort accRow[4 * MAX_WIDTH];
+ rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow);
+ for (j = 0; j < 4 * width; j++) {
+ accRow[j] += incr;
+ }
+ rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL);
+ }
+ }
+ }
+ else {
+ /* other types someday */
+ }
+}
+
+
+static void
+accum_mult(struct gl_context *ctx, GLfloat mult,
+ GLint xpos, GLint ypos, GLint width, GLint height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+
+ assert(rb);
+
+ /* Leave optimized accum buffer mode */
+ if (swrast->_IntegerAccumMode)
+ rescale_accum(ctx);
+
+ if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+ if (rb->GetPointer(ctx, rb, 0, 0)) {
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLshort *acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
+ for (j = 0; j < 4 * width; j++) {
+ acc[j] = (GLshort) (acc[j] * mult);
+ }
+ }
+ }
+ else {
+ GLint i, j;
+ for (i = 0; i < height; i++) {
+ GLshort accRow[4 * MAX_WIDTH];
+ rb->GetRow(ctx, rb, width, xpos, ypos + i, accRow);
+ for (j = 0; j < 4 * width; j++) {
+ accRow[j] = (GLshort) (accRow[j] * mult);
+ }
+ rb->PutRow(ctx, rb, width, xpos, ypos + i, accRow, NULL);
+ }
+ }
+ }
+ else {
+ /* other types someday */
+ }
+}
+
+
+
+static void
+accum_accum(struct gl_context *ctx, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+ const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);
+
+ assert(rb);
+
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no read buffer - OK */
+ return;
+ }
+
+ /* May have to leave optimized accum buffer mode */
+ if (swrast->_IntegerAccumScaler == 0.0 && value > 0.0 && value <= 1.0)
+ swrast->_IntegerAccumScaler = value;
+ if (swrast->_IntegerAccumMode && value != swrast->_IntegerAccumScaler)
+ rescale_accum(ctx);
+
+ if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;
+ GLshort accumRow[4 * MAX_WIDTH];
+ GLchan rgba[MAX_WIDTH][4];
+ GLint i;
+
+ for (i = 0; i < height; i++) {
+ GLshort *acc;
+ if (directAccess) {
+ acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
+ }
+ else {
+ rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);
+ acc = accumRow;
+ }
+
+ /* read colors from color buffer */
+ _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,
+ xpos, ypos + i, CHAN_TYPE, rgba);
+
+ /* do accumulation */
+ if (swrast->_IntegerAccumMode) {
+ /* simply add integer color values into accum buffer */
+ GLint j;
+ for (j = 0; j < width; j++) {
+ acc[j * 4 + 0] += rgba[j][RCOMP];
+ acc[j * 4 + 1] += rgba[j][GCOMP];
+ acc[j * 4 + 2] += rgba[j][BCOMP];
+ acc[j * 4 + 3] += rgba[j][ACOMP];
+ }
+ }
+ else {
+ /* scaled integer (or float) accum buffer */
+ GLint j;
+ for (j = 0; j < width; j++) {
+ acc[j * 4 + 0] += (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);
+ acc[j * 4 + 1] += (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);
+ acc[j * 4 + 2] += (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);
+ acc[j * 4 + 3] += (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);
+ }
+ }
+
+ if (!directAccess) {
+ rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);
+ }
+ }
+ }
+ else {
+ /* other types someday */
+ }
+}
+
+
+
+static void
+accum_load(struct gl_context *ctx, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_renderbuffer *rb
+ = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+ const GLboolean directAccess = (rb->GetPointer(ctx, rb, 0, 0) != NULL);
+
+ assert(rb);
+
+ if (!ctx->ReadBuffer->_ColorReadBuffer) {
+ /* no read buffer - OK */
+ return;
+ }
+
+ /* This is a change to go into optimized accum buffer mode */
+ if (value > 0.0 && value <= 1.0) {
+#if USE_OPTIMIZED_ACCUM
+ swrast->_IntegerAccumMode = GL_TRUE;
+#else
+ swrast->_IntegerAccumMode = GL_FALSE;
+#endif
+ swrast->_IntegerAccumScaler = value;
+ }
+ else {
+ swrast->_IntegerAccumMode = GL_FALSE;
+ swrast->_IntegerAccumScaler = 0.0;
+ }
+
+ if (rb->DataType == GL_SHORT || rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLfloat scale = value * ACCUM_SCALE16 / CHAN_MAXF;
+ GLshort accumRow[4 * MAX_WIDTH];
+ GLchan rgba[MAX_WIDTH][4];
+ GLint i;
+
+ for (i = 0; i < height; i++) {
+ GLshort *acc;
+ if (directAccess) {
+ acc = (GLshort *) rb->GetPointer(ctx, rb, xpos, ypos + i);
+ }
+ else {
+ rb->GetRow(ctx, rb, width, xpos, ypos + i, accumRow);
+ acc = accumRow;
+ }
+
+ /* read colors from color buffer */
+ _swrast_read_rgba_span(ctx, ctx->ReadBuffer->_ColorReadBuffer, width,
+ xpos, ypos + i, CHAN_TYPE, rgba);
+
+ /* do load */
+ if (swrast->_IntegerAccumMode) {
+ /* just copy values in */
+ GLint j;
+ assert(swrast->_IntegerAccumScaler > 0.0);
+ assert(swrast->_IntegerAccumScaler <= 1.0);
+ for (j = 0; j < width; j++) {
+ acc[j * 4 + 0] = rgba[j][RCOMP];
+ acc[j * 4 + 1] = rgba[j][GCOMP];
+ acc[j * 4 + 2] = rgba[j][BCOMP];
+ acc[j * 4 + 3] = rgba[j][ACOMP];
+ }
+ }
+ else {
+ /* scaled integer (or float) accum buffer */
+ GLint j;
+ for (j = 0; j < width; j++) {
+ acc[j * 4 + 0] = (GLshort) ((GLfloat) rgba[j][RCOMP] * scale);
+ acc[j * 4 + 1] = (GLshort) ((GLfloat) rgba[j][GCOMP] * scale);
+ acc[j * 4 + 2] = (GLshort) ((GLfloat) rgba[j][BCOMP] * scale);
+ acc[j * 4 + 3] = (GLshort) ((GLfloat) rgba[j][ACOMP] * scale);
+ }
+ }
+
+ if (!directAccess) {
+ rb->PutRow(ctx, rb, width, xpos, ypos + i, accumRow, NULL);
+ }
+ }
+ }
+}
+
+
+static void
+accum_return(struct gl_context *ctx, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *accumRb = fb->Attachment[BUFFER_ACCUM].Renderbuffer;
+ const GLboolean directAccess
+ = (accumRb->GetPointer(ctx, accumRb, 0, 0) != NULL);
+
+ static GLchan multTable[32768];
+ static GLfloat prevMult = 0.0;
+ const GLfloat mult = swrast->_IntegerAccumScaler;
+ const GLint max = MIN2((GLint) (256 / mult), 32767);
+
+ /* May have to leave optimized accum buffer mode */
+ if (swrast->_IntegerAccumMode && value != 1.0)
+ rescale_accum(ctx);
+
+ if (swrast->_IntegerAccumMode && swrast->_IntegerAccumScaler > 0) {
+ /* build lookup table to avoid many floating point multiplies */
+ GLint j;
+ assert(swrast->_IntegerAccumScaler <= 1.0);
+ if (mult != prevMult) {
+ for (j = 0; j < max; j++)
+ multTable[j] = IROUND((GLfloat) j * mult);
+ prevMult = mult;
+ }
+ }
+
+ if (accumRb->DataType == GL_SHORT ||
+ accumRb->DataType == GL_UNSIGNED_SHORT) {
+ const GLfloat scale = value * CHAN_MAXF / ACCUM_SCALE16;
+ GLuint buffer;
+ GLint i;
+
+ /* XXX maybe transpose the 'i' and 'buffer' loops??? */
+ for (i = 0; i < height; i++) {
+ GLshort accumRow[4 * MAX_WIDTH];
+ GLshort *acc;
+ SWspan span;
+
+ /* init color span */
+ INIT_SPAN(span, GL_BITMAP);
+ span.end = width;
+ span.arrayMask = SPAN_RGBA;
+ span.x = xpos;
+ span.y = ypos + i;
+
+ if (directAccess) {
+ acc = (GLshort *) accumRb->GetPointer(ctx, accumRb, xpos, ypos +i);
+ }
+ else {
+ accumRb->GetRow(ctx, accumRb, width, xpos, ypos + i, accumRow);
+ acc = accumRow;
+ }
+
+ /* get the colors to return */
+ if (swrast->_IntegerAccumMode) {
+ GLint j;
+ for (j = 0; j < width; j++) {
+ ASSERT(acc[j * 4 + 0] < max);
+ ASSERT(acc[j * 4 + 1] < max);
+ ASSERT(acc[j * 4 + 2] < max);
+ ASSERT(acc[j * 4 + 3] < max);
+ span.array->rgba[j][RCOMP] = multTable[acc[j * 4 + 0]];
+ span.array->rgba[j][GCOMP] = multTable[acc[j * 4 + 1]];
+ span.array->rgba[j][BCOMP] = multTable[acc[j * 4 + 2]];
+ span.array->rgba[j][ACOMP] = multTable[acc[j * 4 + 3]];
+ }
+ }
+ else {
+ /* scaled integer (or float) accum buffer */
+ GLint j;
+ for (j = 0; j < width; j++) {
+#if CHAN_BITS==32
+ GLchan r = acc[j * 4 + 0] * scale;
+ GLchan g = acc[j * 4 + 1] * scale;
+ GLchan b = acc[j * 4 + 2] * scale;
+ GLchan a = acc[j * 4 + 3] * scale;
+#else
+ GLint r = IROUND( (GLfloat) (acc[j * 4 + 0]) * scale );
+ GLint g = IROUND( (GLfloat) (acc[j * 4 + 1]) * scale );
+ GLint b = IROUND( (GLfloat) (acc[j * 4 + 2]) * scale );
+ GLint a = IROUND( (GLfloat) (acc[j * 4 + 3]) * scale );
+#endif
+ span.array->rgba[j][RCOMP] = CLAMP( r, 0, CHAN_MAX );
+ span.array->rgba[j][GCOMP] = CLAMP( g, 0, CHAN_MAX );
+ span.array->rgba[j][BCOMP] = CLAMP( b, 0, CHAN_MAX );
+ span.array->rgba[j][ACOMP] = CLAMP( a, 0, CHAN_MAX );
+ }
+ }
+
+ /* store colors */
+ for (buffer = 0; buffer < fb->_NumColorDrawBuffers; buffer++) {
+ struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buffer];
+ const GLboolean masking = (!ctx->Color.ColorMask[buffer][RCOMP] ||
+ !ctx->Color.ColorMask[buffer][GCOMP] ||
+ !ctx->Color.ColorMask[buffer][BCOMP] ||
+ !ctx->Color.ColorMask[buffer][ACOMP]);
+ if (masking) {
+ _swrast_mask_rgba_span(ctx, rb, &span, buffer);
+ }
+ rb->PutRow(ctx, rb, width, xpos, ypos + i, span.array->rgba, NULL);
+ }
+ }
+ }
+ else {
+ /* other types someday */
+ }
+}
+
+
+
+/**
+ * Software fallback for glAccum.
+ */
+void
+_swrast_Accum(struct gl_context *ctx, GLenum op, GLfloat value)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLint xpos, ypos, width, height;
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ if (!ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer) {
+ _mesa_warning(ctx, "Calling glAccum() without an accumulation buffer");
+ return;
+ }
+
+ if (!_mesa_check_conditional_render(ctx))
+ return;
+
+ swrast_render_start(ctx);
+
+ /* Compute region after calling swrast_render_start() so that we know the
+ * drawbuffer's size/bounds are up to date.
+ */
+ xpos = ctx->DrawBuffer->_Xmin;
+ ypos = ctx->DrawBuffer->_Ymin;
+ width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+
+ switch (op) {
+ case GL_ADD:
+ if (value != 0.0F) {
+ accum_add(ctx, value, xpos, ypos, width, height);
+ }
+ break;
+ case GL_MULT:
+ if (value != 1.0F) {
+ accum_mult(ctx, value, xpos, ypos, width, height);
+ }
+ break;
+ case GL_ACCUM:
+ if (value != 0.0F) {
+ accum_accum(ctx, value, xpos, ypos, width, height);
+ }
+ break;
+ case GL_LOAD:
+ accum_load(ctx, value, xpos, ypos, width, height);
+ break;
+ case GL_RETURN:
+ accum_return(ctx, value, xpos, ypos, width, height);
+ break;
+ default:
+ _mesa_problem(ctx, "invalid mode in _swrast_Accum()");
+ break;
+ }
+
+ swrast_render_finish(ctx);
+}
diff --git a/mesalib/src/mesa/swrast/s_bitmap.c b/mesalib/src/mesa/swrast/s_bitmap.c
index af65874fd..18f1c1866 100644
--- a/mesalib/src/mesa/swrast/s_bitmap.c
+++ b/mesalib/src/mesa/swrast/s_bitmap.c
@@ -1,223 +1,223 @@
-/*
- * Mesa 3-D graphics library
- * Version: 7.1
- *
- * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/**
- * \file swrast/s_bitmap.c
- * \brief glBitmap rendering.
- * \author Brian Paul
- */
-
-#include "main/glheader.h"
-#include "main/bufferobj.h"
-#include "main/condrender.h"
-#include "main/image.h"
-#include "main/macros.h"
-#include "main/pbo.h"
-
-#include "s_context.h"
-#include "s_span.h"
-
-
-
-/**
- * Render a bitmap.
- * Called via ctx->Driver.Bitmap()
- * All parameter error checking will have been done before this is called.
- */
-void
-_swrast_Bitmap( struct gl_context *ctx, GLint px, GLint py,
- GLsizei width, GLsizei height,
- const struct gl_pixelstore_attrib *unpack,
- const GLubyte *bitmap )
-{
- GLint row, col;
- GLuint count = 0;
- SWspan span;
-
- ASSERT(ctx->RenderMode == GL_RENDER);
-
- if (!_mesa_check_conditional_render(ctx))
- return; /* don't draw */
-
- bitmap = (const GLubyte *) _mesa_map_pbo_source(ctx, unpack, bitmap);
- if (!bitmap)
- return;
-
- swrast_render_start(ctx);
-
- if (SWRAST_CONTEXT(ctx)->NewState)
- _swrast_validate_derived( ctx );
-
- INIT_SPAN(span, GL_BITMAP);
- span.end = width;
- span.arrayMask = SPAN_XY;
- _swrast_span_default_attribs(ctx, &span);
-
- for (row = 0; row < height; row++) {
- const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
- bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
-
- if (unpack->LsbFirst) {
- /* Lsb first */
- GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
- for (col = 0; col < width; col++) {
- if (*src & mask) {
- span.array->x[count] = px + col;
- span.array->y[count] = py + row;
- count++;
- }
- if (mask == 128U) {
- src++;
- mask = 1U;
- }
- else {
- mask = mask << 1;
- }
- }
-
- /* get ready for next row */
- if (mask != 1)
- src++;
- }
- else {
- /* Msb first */
- GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
- for (col = 0; col < width; col++) {
- if (*src & mask) {
- span.array->x[count] = px + col;
- span.array->y[count] = py + row;
- count++;
- }
- if (mask == 1U) {
- src++;
- mask = 128U;
- }
- else {
- mask = mask >> 1;
- }
- }
-
- /* get ready for next row */
- if (mask != 128)
- src++;
- }
-
- if (count + width >= MAX_WIDTH || row + 1 == height) {
- /* flush the span */
- span.end = count;
- _swrast_write_rgba_span(ctx, &span);
- span.end = 0;
- count = 0;
- }
- }
-
- swrast_render_finish(ctx);
-
- _mesa_unmap_pbo_source(ctx, unpack);
-}
-
-
-#if 0
-/*
- * XXX this is another way to implement Bitmap. Use horizontal runs of
- * fragments, initializing the mask array to indicate which fragments to
- * draw or skip.
- */
-void
-_swrast_Bitmap( struct gl_context *ctx, GLint px, GLint py,
- GLsizei width, GLsizei height,
- const struct gl_pixelstore_attrib *unpack,
- const GLubyte *bitmap )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLint row, col;
- SWspan span;
-
- ASSERT(ctx->RenderMode == GL_RENDER);
- ASSERT(bitmap);
-
- swrast_render_start(ctx);
-
- if (SWRAST_CONTEXT(ctx)->NewState)
- _swrast_validate_derived( ctx );
-
- INIT_SPAN(span, GL_BITMAP);
- span.end = width;
- span.arrayMask = SPAN_MASK;
- _swrast_span_default_attribs(ctx, &span);
-
- /*span.arrayMask |= SPAN_MASK;*/ /* we'll init span.mask[] */
- span.x = px;
- span.y = py;
- /*span.end = width;*/
-
- for (row=0; row<height; row++, span.y++) {
- const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
- bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
-
- if (unpack->LsbFirst) {
- /* Lsb first */
- GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
- for (col=0; col<width; col++) {
- span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
- if (mask == 128U) {
- src++;
- mask = 1U;
- }
- else {
- mask = mask << 1;
- }
- }
-
- _swrast_write_rgba_span(ctx, &span);
-
- /* get ready for next row */
- if (mask != 1)
- src++;
- }
- else {
- /* Msb first */
- GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
- for (col=0; col<width; col++) {
- span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
- if (mask == 1U) {
- src++;
- mask = 128U;
- }
- else {
- mask = mask >> 1;
- }
- }
-
- _swrast_write_rgba_span(ctx, &span);
-
- /* get ready for next row */
- if (mask != 128)
- src++;
- }
- }
-
- swrast_render_finish(ctx);
-}
-#endif
+/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file swrast/s_bitmap.c
+ * \brief glBitmap rendering.
+ * \author Brian Paul
+ */
+
+#include "main/glheader.h"
+#include "main/bufferobj.h"
+#include "main/condrender.h"
+#include "main/image.h"
+#include "main/macros.h"
+#include "main/pbo.h"
+
+#include "s_context.h"
+#include "s_span.h"
+
+
+
+/**
+ * Render a bitmap.
+ * Called via ctx->Driver.Bitmap()
+ * All parameter error checking will have been done before this is called.
+ */
+void
+_swrast_Bitmap( struct gl_context *ctx, GLint px, GLint py,
+ GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte *bitmap )
+{
+ GLint row, col;
+ GLuint count = 0;
+ SWspan span;
+
+ ASSERT(ctx->RenderMode == GL_RENDER);
+
+ if (!_mesa_check_conditional_render(ctx))
+ return; /* don't draw */
+
+ bitmap = (const GLubyte *) _mesa_map_pbo_source(ctx, unpack, bitmap);
+ if (!bitmap)
+ return;
+
+ swrast_render_start(ctx);
+
+ if (SWRAST_CONTEXT(ctx)->NewState)
+ _swrast_validate_derived( ctx );
+
+ INIT_SPAN(span, GL_BITMAP);
+ span.end = width;
+ span.arrayMask = SPAN_XY;
+ _swrast_span_default_attribs(ctx, &span);
+
+ for (row = 0; row < height; row++) {
+ const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
+ bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
+
+ if (unpack->LsbFirst) {
+ /* Lsb first */
+ GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
+ for (col = 0; col < width; col++) {
+ if (*src & mask) {
+ span.array->x[count] = px + col;
+ span.array->y[count] = py + row;
+ count++;
+ }
+ if (mask == 128U) {
+ src++;
+ mask = 1U;
+ }
+ else {
+ mask = mask << 1;
+ }
+ }
+
+ /* get ready for next row */
+ if (mask != 1)
+ src++;
+ }
+ else {
+ /* Msb first */
+ GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
+ for (col = 0; col < width; col++) {
+ if (*src & mask) {
+ span.array->x[count] = px + col;
+ span.array->y[count] = py + row;
+ count++;
+ }
+ if (mask == 1U) {
+ src++;
+ mask = 128U;
+ }
+ else {
+ mask = mask >> 1;
+ }
+ }
+
+ /* get ready for next row */
+ if (mask != 128)
+ src++;
+ }
+
+ if (count + width >= MAX_WIDTH || row + 1 == height) {
+ /* flush the span */
+ span.end = count;
+ _swrast_write_rgba_span(ctx, &span);
+ span.end = 0;
+ count = 0;
+ }
+ }
+
+ swrast_render_finish(ctx);
+
+ _mesa_unmap_pbo_source(ctx, unpack);
+}
+
+
+#if 0
+/*
+ * XXX this is another way to implement Bitmap. Use horizontal runs of
+ * fragments, initializing the mask array to indicate which fragments to
+ * draw or skip.
+ */
+void
+_swrast_Bitmap( struct gl_context *ctx, GLint px, GLint py,
+ GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte *bitmap )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLint row, col;
+ SWspan span;
+
+ ASSERT(ctx->RenderMode == GL_RENDER);
+ ASSERT(bitmap);
+
+ swrast_render_start(ctx);
+
+ if (SWRAST_CONTEXT(ctx)->NewState)
+ _swrast_validate_derived( ctx );
+
+ INIT_SPAN(span, GL_BITMAP);
+ span.end = width;
+ span.arrayMask = SPAN_MASK;
+ _swrast_span_default_attribs(ctx, &span);
+
+ /*span.arrayMask |= SPAN_MASK;*/ /* we'll init span.mask[] */
+ span.x = px;
+ span.y = py;
+ /*span.end = width;*/
+
+ for (row=0; row<height; row++, span.y++) {
+ const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
+ bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
+
+ if (unpack->LsbFirst) {
+ /* Lsb first */
+ GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
+ for (col=0; col<width; col++) {
+ span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
+ if (mask == 128U) {
+ src++;
+ mask = 1U;
+ }
+ else {
+ mask = mask << 1;
+ }
+ }
+
+ _swrast_write_rgba_span(ctx, &span);
+
+ /* get ready for next row */
+ if (mask != 1)
+ src++;
+ }
+ else {
+ /* Msb first */
+ GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
+ for (col=0; col<width; col++) {
+ span.array->mask[col] = (*src & mask) ? GL_TRUE : GL_FALSE;
+ if (mask == 1U) {
+ src++;
+ mask = 128U;
+ }
+ else {
+ mask = mask >> 1;
+ }
+ }
+
+ _swrast_write_rgba_span(ctx, &span);
+
+ /* get ready for next row */
+ if (mask != 128)
+ src++;
+ }
+ }
+
+ swrast_render_finish(ctx);
+}
+#endif
diff --git a/mesalib/src/mesa/swrast/s_context.c b/mesalib/src/mesa/swrast/s_context.c
index e65f6aa9d..df213357f 100644
--- a/mesalib/src/mesa/swrast/s_context.c
+++ b/mesalib/src/mesa/swrast/s_context.c
@@ -1,906 +1,906 @@
-/*
- * Mesa 3-D graphics library
- * Version: 7.1
- *
- * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors:
- * Keith Whitwell <keith@tungstengraphics.com>
- * Brian Paul
- */
-
-#include "main/imports.h"
-#include "main/bufferobj.h"
-#include "main/colormac.h"
-#include "main/mtypes.h"
-#include "main/teximage.h"
-#include "program/prog_parameter.h"
-#include "program/prog_statevars.h"
-#include "swrast.h"
-#include "s_blend.h"
-#include "s_context.h"
-#include "s_lines.h"
-#include "s_points.h"
-#include "s_span.h"
-#include "s_triangle.h"
-#include "s_texfilter.h"
-
-
-/**
- * Recompute the value of swrast->_RasterMask, etc. according to
- * the current context. The _RasterMask field can be easily tested by
- * drivers to determine certain basic GL state (does the primitive need
- * stenciling, logic-op, fog, etc?).
- */
-static void
-_swrast_update_rasterflags( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLbitfield rasterMask = 0;
- GLuint i;
-
- if (ctx->Color.AlphaEnabled) rasterMask |= ALPHATEST_BIT;
- if (ctx->Color.BlendEnabled) rasterMask |= BLEND_BIT;
- if (ctx->Depth.Test) rasterMask |= DEPTH_BIT;
- if (swrast->_FogEnabled) rasterMask |= FOG_BIT;
- if (ctx->Scissor.Enabled) rasterMask |= CLIP_BIT;
- if (ctx->Stencil._Enabled) rasterMask |= STENCIL_BIT;
- for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
- if (!ctx->Color.ColorMask[i][0] ||
- !ctx->Color.ColorMask[i][1] ||
- !ctx->Color.ColorMask[i][2] ||
- !ctx->Color.ColorMask[i][3]) {
- rasterMask |= MASKING_BIT;
- break;
- }
- }
- if (ctx->Color._LogicOpEnabled) rasterMask |= LOGIC_OP_BIT;
- if (ctx->Texture._EnabledUnits) rasterMask |= TEXTURE_BIT;
- if ( ctx->Viewport.X < 0
- || ctx->Viewport.X + ctx->Viewport.Width > (GLint) ctx->DrawBuffer->Width
- || ctx->Viewport.Y < 0
- || ctx->Viewport.Y + ctx->Viewport.Height > (GLint) ctx->DrawBuffer->Height) {
- rasterMask |= CLIP_BIT;
- }
-
- if (ctx->Query.CurrentOcclusionObject)
- rasterMask |= OCCLUSION_BIT;
-
-
- /* If we're not drawing to exactly one color buffer set the
- * MULTI_DRAW_BIT flag. Also set it if we're drawing to no
- * buffers or the RGBA or CI mask disables all writes.
- */
- if (ctx->DrawBuffer->_NumColorDrawBuffers != 1) {
- /* more than one color buffer designated for writing (or zero buffers) */
- rasterMask |= MULTI_DRAW_BIT;
- }
-
- for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
- if (ctx->Color.ColorMask[i][0] +
- ctx->Color.ColorMask[i][1] +
- ctx->Color.ColorMask[i][2] +
- ctx->Color.ColorMask[i][3] == 0) {
- rasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */
- break;
- }
- }
-
-
- if (ctx->FragmentProgram._Current) {
- rasterMask |= FRAGPROG_BIT;
- }
-
- if (ctx->ATIFragmentShader._Enabled) {
- rasterMask |= ATIFRAGSHADER_BIT;
- }
-
-#if CHAN_TYPE == GL_FLOAT
- if (ctx->Color.ClampFragmentColor == GL_TRUE) {
- rasterMask |= CLAMPING_BIT;
- }
-#endif
-
- SWRAST_CONTEXT(ctx)->_RasterMask = rasterMask;
-}
-
-
-/**
- * Examine polygon cull state to compute the _BackfaceCullSign field.
- * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,
- * and 1 if culling front-faces. The Polygon FrontFace state also
- * factors in.
- */
-static void
-_swrast_update_polygon( struct gl_context *ctx )
-{
- GLfloat backface_sign;
-
- if (ctx->Polygon.CullFlag) {
- switch (ctx->Polygon.CullFaceMode) {
- case GL_BACK:
- backface_sign = -1.0F;
- break;
- case GL_FRONT:
- backface_sign = 1.0F;
- break;
- case GL_FRONT_AND_BACK:
- /* fallthrough */
- default:
- backface_sign = 0.0F;
- }
- }
- else {
- backface_sign = 0.0F;
- }
-
- SWRAST_CONTEXT(ctx)->_BackfaceCullSign = backface_sign;
-
- /* This is for front/back-face determination, but not for culling */
- SWRAST_CONTEXT(ctx)->_BackfaceSign
- = (ctx->Polygon.FrontFace == GL_CW) ? -1.0F : 1.0F;
-}
-
-
-
-/**
- * Update the _PreferPixelFog field to indicate if we need to compute
- * fog blend factors (from the fog coords) per-fragment.
- */
-static void
-_swrast_update_fog_hint( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- swrast->_PreferPixelFog = (!swrast->AllowVertexFog ||
- ctx->FragmentProgram._Current ||
- (ctx->Hint.Fog == GL_NICEST &&
- swrast->AllowPixelFog));
-}
-
-
-
-/**
- * Update the swrast->_TextureCombinePrimary flag.
- */
-static void
-_swrast_update_texture_env( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLuint i;
-
- swrast->_TextureCombinePrimary = GL_FALSE;
-
- for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
- const struct gl_tex_env_combine_state *combine =
- ctx->Texture.Unit[i]._CurrentCombine;
- GLuint term;
- for (term = 0; term < combine->_NumArgsRGB; term++) {
- if (combine->SourceRGB[term] == GL_PRIMARY_COLOR) {
- swrast->_TextureCombinePrimary = GL_TRUE;
- return;
- }
- if (combine->SourceA[term] == GL_PRIMARY_COLOR) {
- swrast->_TextureCombinePrimary = GL_TRUE;
- return;
- }
- }
- }
-}
-
-
-/**
- * Determine if we can defer texturing/shading until after Z/stencil
- * testing. This potentially allows us to skip texturing/shading for
- * lots of fragments.
- */
-static void
-_swrast_update_deferred_texture(struct gl_context *ctx)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- if (ctx->Color.AlphaEnabled) {
- /* alpha test depends on post-texture/shader colors */
- swrast->_DeferredTexture = GL_FALSE;
- }
- else {
- const struct gl_fragment_program *fprog
- = ctx->FragmentProgram._Current;
- if (fprog && (fprog->Base.OutputsWritten & (1 << FRAG_RESULT_DEPTH))) {
- /* Z comes from fragment program/shader */
- swrast->_DeferredTexture = GL_FALSE;
- }
- else if (fprog && fprog->UsesKill) {
- swrast->_DeferredTexture = GL_FALSE;
- }
- else if (ctx->Query.CurrentOcclusionObject) {
- /* occlusion query depends on shader discard/kill results */
- swrast->_DeferredTexture = GL_FALSE;
- }
- else {
- swrast->_DeferredTexture = GL_TRUE;
- }
- }
-}
-
-
-/**
- * Update swrast->_FogColor and swrast->_FogEnable values.
- */
-static void
-_swrast_update_fog_state( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
-
- assert((fp == NULL) || (fp->Base.Target == GL_FRAGMENT_PROGRAM_ARB));
-
- /* determine if fog is needed, and if so, which fog mode */
- swrast->_FogEnabled = (fp == NULL && ctx->Fog.Enabled);
-}
-
-
-/**
- * Update state for running fragment programs. Basically, load the
- * program parameters with current state values.
- */
-static void
-_swrast_update_fragment_program(struct gl_context *ctx, GLbitfield newState)
-{
- const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
- if (fp) {
- _mesa_load_state_parameters(ctx, fp->Base.Parameters);
- }
-}
-
-
-/**
- * See if we can do early diffuse+specular (primary+secondary) color
- * add per vertex instead of per-fragment.
- */
-static void
-_swrast_update_specular_vertex_add(struct gl_context *ctx)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLboolean separateSpecular = ctx->Fog.ColorSumEnabled ||
- (ctx->Light.Enabled &&
- ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR);
-
- swrast->SpecularVertexAdd = (separateSpecular
- && ctx->Texture._EnabledUnits == 0x0
- && !ctx->FragmentProgram._Current
- && !ctx->ATIFragmentShader._Enabled);
-}
-
-
-#define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK | \
- _NEW_PROGRAM_CONSTANTS | \
- _NEW_TEXTURE | \
- _NEW_HINT | \
- _NEW_POLYGON )
-
-/* State referenced by _swrast_choose_triangle, _swrast_choose_line.
- */
-#define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED | \
- _NEW_RENDERMODE| \
- _NEW_POLYGON| \
- _NEW_DEPTH| \
- _NEW_STENCIL| \
- _NEW_COLOR| \
- _NEW_TEXTURE| \
- _SWRAST_NEW_RASTERMASK| \
- _NEW_LIGHT| \
- _NEW_FOG | \
- _DD_NEW_SEPARATE_SPECULAR)
-
-#define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED | \
- _NEW_RENDERMODE| \
- _NEW_LINE| \
- _NEW_TEXTURE| \
- _NEW_LIGHT| \
- _NEW_FOG| \
- _NEW_DEPTH | \
- _DD_NEW_SEPARATE_SPECULAR)
-
-#define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED | \
- _NEW_RENDERMODE | \
- _NEW_POINT | \
- _NEW_TEXTURE | \
- _NEW_LIGHT | \
- _NEW_FOG | \
- _DD_NEW_SEPARATE_SPECULAR)
-
-#define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
-
-#define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
-
-#define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
-
-
-
-/**
- * Stub for swrast->Triangle to select a true triangle function
- * after a state change.
- */
-static void
-_swrast_validate_triangle( struct gl_context *ctx,
- const SWvertex *v0,
- const SWvertex *v1,
- const SWvertex *v2 )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
- _swrast_validate_derived( ctx );
- swrast->choose_triangle( ctx );
- ASSERT(swrast->Triangle);
-
- if (swrast->SpecularVertexAdd) {
- /* separate specular color, but no texture */
- swrast->SpecTriangle = swrast->Triangle;
- swrast->Triangle = _swrast_add_spec_terms_triangle;
- }
-
- swrast->Triangle( ctx, v0, v1, v2 );
-}
-
-/**
- * Called via swrast->Line. Examine current GL state and choose a software
- * line routine. Then call it.
- */
-static void
-_swrast_validate_line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
- _swrast_validate_derived( ctx );
- swrast->choose_line( ctx );
- ASSERT(swrast->Line);
-
- if (swrast->SpecularVertexAdd) {
- swrast->SpecLine = swrast->Line;
- swrast->Line = _swrast_add_spec_terms_line;
- }
-
- swrast->Line( ctx, v0, v1 );
-}
-
-/**
- * Called via swrast->Point. Examine current GL state and choose a software
- * point routine. Then call it.
- */
-static void
-_swrast_validate_point( struct gl_context *ctx, const SWvertex *v0 )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
- _swrast_validate_derived( ctx );
- swrast->choose_point( ctx );
-
- if (swrast->SpecularVertexAdd) {
- swrast->SpecPoint = swrast->Point;
- swrast->Point = _swrast_add_spec_terms_point;
- }
-
- swrast->Point( ctx, v0 );
-}
-
-
-/**
- * Called via swrast->BlendFunc. Examine GL state to choose a blending
- * function, then call it.
- */
-static void _ASMAPI
-_swrast_validate_blend_func(struct gl_context *ctx, GLuint n, const GLubyte mask[],
- GLvoid *src, const GLvoid *dst,
- GLenum chanType )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
- _swrast_validate_derived( ctx ); /* why is this needed? */
- _swrast_choose_blend_func( ctx, chanType );
-
- swrast->BlendFunc( ctx, n, mask, src, dst, chanType );
-}
-
-static void
-_swrast_sleep( struct gl_context *ctx, GLbitfield new_state )
-{
- (void) ctx; (void) new_state;
-}
-
-
-static void
-_swrast_invalidate_state( struct gl_context *ctx, GLbitfield new_state )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLuint i;
-
- swrast->NewState |= new_state;
-
- /* After 10 statechanges without any swrast functions being called,
- * put the module to sleep.
- */
- if (++swrast->StateChanges > 10) {
- swrast->InvalidateState = _swrast_sleep;
- swrast->NewState = ~0;
- new_state = ~0;
- }
-
- if (new_state & swrast->InvalidateTriangleMask)
- swrast->Triangle = _swrast_validate_triangle;
-
- if (new_state & swrast->InvalidateLineMask)
- swrast->Line = _swrast_validate_line;
-
- if (new_state & swrast->InvalidatePointMask)
- swrast->Point = _swrast_validate_point;
-
- if (new_state & _SWRAST_NEW_BLEND_FUNC)
- swrast->BlendFunc = _swrast_validate_blend_func;
-
- if (new_state & _SWRAST_NEW_TEXTURE_SAMPLE_FUNC)
- for (i = 0 ; i < ctx->Const.MaxTextureImageUnits ; i++)
- swrast->TextureSample[i] = NULL;
-}
-
-
-void
-_swrast_update_texture_samplers(struct gl_context *ctx)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLuint u;
-
- if (!swrast)
- return; /* pipe hack */
-
- for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
- const struct gl_texture_object *tObj = ctx->Texture.Unit[u]._Current;
- /* Note: If tObj is NULL, the sample function will be a simple
- * function that just returns opaque black (0,0,0,1).
- */
- swrast->TextureSample[u] = _swrast_choose_texture_sample_func(ctx, tObj);
- }
-}
-
-
-/**
- * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,
- * swrast->_ActiveAtttribMask.
- */
-static void
-_swrast_update_active_attribs(struct gl_context *ctx)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLuint attribsMask;
-
- /*
- * Compute _ActiveAttribsMask = which fragment attributes are needed.
- */
- if (ctx->FragmentProgram._Current) {
- /* fragment program/shader */
- attribsMask = ctx->FragmentProgram._Current->Base.InputsRead;
- attribsMask &= ~FRAG_BIT_WPOS; /* WPOS is always handled specially */
- }
- else if (ctx->ATIFragmentShader._Enabled) {
- attribsMask = ~0; /* XXX fix me */
- }
- else {
- /* fixed function */
- attribsMask = 0x0;
-
-#if CHAN_TYPE == GL_FLOAT
- attribsMask |= FRAG_BIT_COL0;
-#endif
-
- if (ctx->Fog.ColorSumEnabled ||
- (ctx->Light.Enabled &&
- ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)) {
- attribsMask |= FRAG_BIT_COL1;
- }
-
- if (swrast->_FogEnabled)
- attribsMask |= FRAG_BIT_FOGC;
-
- attribsMask |= (ctx->Texture._EnabledUnits << FRAG_ATTRIB_TEX0);
- }
-
- swrast->_ActiveAttribMask = attribsMask;
-
- /* Update _ActiveAttribs[] list */
- {
- GLuint i, num = 0;
- for (i = 0; i < FRAG_ATTRIB_MAX; i++) {
- if (attribsMask & (1 << i)) {
- swrast->_ActiveAttribs[num++] = i;
- /* how should this attribute be interpolated? */
- if (i == FRAG_ATTRIB_COL0 || i == FRAG_ATTRIB_COL1)
- swrast->_InterpMode[i] = ctx->Light.ShadeModel;
- else
- swrast->_InterpMode[i] = GL_SMOOTH;
- }
- }
- swrast->_NumActiveAttribs = num;
- }
-}
-
-
-void
-_swrast_validate_derived( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
- if (swrast->NewState) {
- if (swrast->NewState & _NEW_POLYGON)
- _swrast_update_polygon( ctx );
-
- if (swrast->NewState & (_NEW_HINT | _NEW_PROGRAM))
- _swrast_update_fog_hint( ctx );
-
- if (swrast->NewState & _SWRAST_NEW_TEXTURE_ENV_MODE)
- _swrast_update_texture_env( ctx );
-
- if (swrast->NewState & (_NEW_FOG | _NEW_PROGRAM))
- _swrast_update_fog_state( ctx );
-
- if (swrast->NewState & (_NEW_PROGRAM_CONSTANTS | _NEW_PROGRAM))
- _swrast_update_fragment_program( ctx, swrast->NewState );
-
- if (swrast->NewState & (_NEW_TEXTURE | _NEW_PROGRAM)) {
- _swrast_update_texture_samplers( ctx );
- }
-
- if (swrast->NewState & (_NEW_COLOR | _NEW_PROGRAM))
- _swrast_update_deferred_texture(ctx);
-
- if (swrast->NewState & _SWRAST_NEW_RASTERMASK)
- _swrast_update_rasterflags( ctx );
-
- if (swrast->NewState & (_NEW_DEPTH |
- _NEW_FOG |
- _NEW_LIGHT |
- _NEW_PROGRAM |
- _NEW_TEXTURE))
- _swrast_update_active_attribs(ctx);
-
- if (swrast->NewState & (_NEW_FOG |
- _NEW_PROGRAM |
- _NEW_LIGHT |
- _NEW_TEXTURE))
- _swrast_update_specular_vertex_add(ctx);
-
- swrast->NewState = 0;
- swrast->StateChanges = 0;
- swrast->InvalidateState = _swrast_invalidate_state;
- }
-}
-
-#define SWRAST_DEBUG 0
-
-/* Public entrypoints: See also s_accum.c, s_bitmap.c, etc.
- */
-void
-_swrast_Quad( struct gl_context *ctx,
- const SWvertex *v0, const SWvertex *v1,
- const SWvertex *v2, const SWvertex *v3 )
-{
- if (SWRAST_DEBUG) {
- _mesa_debug(ctx, "_swrast_Quad\n");
- _swrast_print_vertex( ctx, v0 );
- _swrast_print_vertex( ctx, v1 );
- _swrast_print_vertex( ctx, v2 );
- _swrast_print_vertex( ctx, v3 );
- }
- SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v3 );
- SWRAST_CONTEXT(ctx)->Triangle( ctx, v1, v2, v3 );
-}
-
-void
-_swrast_Triangle( struct gl_context *ctx, const SWvertex *v0,
- const SWvertex *v1, const SWvertex *v2 )
-{
- if (SWRAST_DEBUG) {
- _mesa_debug(ctx, "_swrast_Triangle\n");
- _swrast_print_vertex( ctx, v0 );
- _swrast_print_vertex( ctx, v1 );
- _swrast_print_vertex( ctx, v2 );
- }
- SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v2 );
-}
-
-void
-_swrast_Line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )
-{
- if (SWRAST_DEBUG) {
- _mesa_debug(ctx, "_swrast_Line\n");
- _swrast_print_vertex( ctx, v0 );
- _swrast_print_vertex( ctx, v1 );
- }
- SWRAST_CONTEXT(ctx)->Line( ctx, v0, v1 );
-}
-
-void
-_swrast_Point( struct gl_context *ctx, const SWvertex *v0 )
-{
- if (SWRAST_DEBUG) {
- _mesa_debug(ctx, "_swrast_Point\n");
- _swrast_print_vertex( ctx, v0 );
- }
- SWRAST_CONTEXT(ctx)->Point( ctx, v0 );
-}
-
-void
-_swrast_InvalidateState( struct gl_context *ctx, GLbitfield new_state )
-{
- if (SWRAST_DEBUG) {
- _mesa_debug(ctx, "_swrast_InvalidateState\n");
- }
- SWRAST_CONTEXT(ctx)->InvalidateState( ctx, new_state );
-}
-
-void
-_swrast_ResetLineStipple( struct gl_context *ctx )
-{
- if (SWRAST_DEBUG) {
- _mesa_debug(ctx, "_swrast_ResetLineStipple\n");
- }
- SWRAST_CONTEXT(ctx)->StippleCounter = 0;
-}
-
-void
-_swrast_SetFacing(struct gl_context *ctx, GLuint facing)
-{
- SWRAST_CONTEXT(ctx)->PointLineFacing = facing;
-}
-
-void
-_swrast_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
-{
- if (SWRAST_DEBUG) {
- _mesa_debug(ctx, "_swrast_allow_vertex_fog %d\n", value);
- }
- SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );
- SWRAST_CONTEXT(ctx)->AllowVertexFog = value;
-}
-
-void
-_swrast_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
-{
- if (SWRAST_DEBUG) {
- _mesa_debug(ctx, "_swrast_allow_pixel_fog %d\n", value);
- }
- SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );
- SWRAST_CONTEXT(ctx)->AllowPixelFog = value;
-}
-
-
-/**
- * Initialize native program limits by copying the logical limits.
- * See comments in init_program_limits() in context.c
- */
-static void
-init_program_native_limits(struct gl_program_constants *prog)
-{
- prog->MaxNativeInstructions = prog->MaxInstructions;
- prog->MaxNativeAluInstructions = prog->MaxAluInstructions;
- prog->MaxNativeTexInstructions = prog->MaxTexInstructions;
- prog->MaxNativeTexIndirections = prog->MaxTexIndirections;
- prog->MaxNativeAttribs = prog->MaxAttribs;
- prog->MaxNativeTemps = prog->MaxTemps;
- prog->MaxNativeAddressRegs = prog->MaxAddressRegs;
- prog->MaxNativeParameters = prog->MaxParameters;
-}
-
-
-GLboolean
-_swrast_CreateContext( struct gl_context *ctx )
-{
- GLuint i;
- SWcontext *swrast = (SWcontext *)CALLOC(sizeof(SWcontext));
-#ifdef _OPENMP
- const GLint maxThreads = omp_get_max_threads();
-#else
- const GLint maxThreads = 1;
-#endif
-
- if (SWRAST_DEBUG) {
- _mesa_debug(ctx, "_swrast_CreateContext\n");
- }
-
- if (!swrast)
- return GL_FALSE;
-
- swrast->NewState = ~0;
-
- swrast->choose_point = _swrast_choose_point;
- swrast->choose_line = _swrast_choose_line;
- swrast->choose_triangle = _swrast_choose_triangle;
-
- swrast->InvalidatePointMask = _SWRAST_NEW_POINT;
- swrast->InvalidateLineMask = _SWRAST_NEW_LINE;
- swrast->InvalidateTriangleMask = _SWRAST_NEW_TRIANGLE;
-
- swrast->Point = _swrast_validate_point;
- swrast->Line = _swrast_validate_line;
- swrast->Triangle = _swrast_validate_triangle;
- swrast->InvalidateState = _swrast_sleep;
- swrast->BlendFunc = _swrast_validate_blend_func;
-
- swrast->AllowVertexFog = GL_TRUE;
- swrast->AllowPixelFog = GL_TRUE;
-
- /* Optimized Accum buffer */
- swrast->_IntegerAccumMode = GL_FALSE;
- swrast->_IntegerAccumScaler = 0.0;
-
- for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++)
- swrast->TextureSample[i] = NULL;
-
- /* SpanArrays is global and shared by all SWspan instances. However, when
- * using multiple threads, it is necessary to have one SpanArrays instance
- * per thread.
- */
- swrast->SpanArrays = (SWspanarrays *) MALLOC(maxThreads * sizeof(SWspanarrays));
- if (!swrast->SpanArrays) {
- FREE(swrast);
- return GL_FALSE;
- }
- for(i = 0; i < maxThreads; i++) {
- swrast->SpanArrays[i].ChanType = CHAN_TYPE;
-#if CHAN_TYPE == GL_UNSIGNED_BYTE
- swrast->SpanArrays[i].rgba = swrast->SpanArrays[i].rgba8;
-#elif CHAN_TYPE == GL_UNSIGNED_SHORT
- swrast->SpanArrays[i].rgba = swrast->SpanArrays[i].rgba16;
-#else
- swrast->SpanArrays[i].rgba = swrast->SpanArrays[i].attribs[FRAG_ATTRIB_COL0];
-#endif
- }
-
- /* init point span buffer */
- swrast->PointSpan.primitive = GL_POINT;
- swrast->PointSpan.end = 0;
- swrast->PointSpan.facing = 0;
- swrast->PointSpan.array = swrast->SpanArrays;
-
- /* TexelBuffer is also global and normally shared by all SWspan instances;
- * when running with multiple threads, create one per thread.
- */
- swrast->TexelBuffer = (GLfloat *) MALLOC(ctx->Const.MaxTextureImageUnits * maxThreads *
- MAX_WIDTH * 4 * sizeof(GLfloat));
- if (!swrast->TexelBuffer) {
- FREE(swrast->SpanArrays);
- FREE(swrast);
- return GL_FALSE;
- }
-
- init_program_native_limits(&ctx->Const.VertexProgram);
- init_program_native_limits(&ctx->Const.GeometryProgram);
- init_program_native_limits(&ctx->Const.FragmentProgram);
-
- ctx->swrast_context = swrast;
-
- return GL_TRUE;
-}
-
-void
-_swrast_DestroyContext( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
- if (SWRAST_DEBUG) {
- _mesa_debug(ctx, "_swrast_DestroyContext\n");
- }
-
- FREE( swrast->SpanArrays );
- if (swrast->ZoomedArrays)
- FREE( swrast->ZoomedArrays );
- FREE( swrast->TexelBuffer );
- FREE( swrast );
-
- ctx->swrast_context = 0;
-}
-
-
-struct swrast_device_driver *
-_swrast_GetDeviceDriverReference( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- return &swrast->Driver;
-}
-
-void
-_swrast_flush( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- /* flush any pending fragments from rendering points */
- if (swrast->PointSpan.end > 0) {
- _swrast_write_rgba_span(ctx, &(swrast->PointSpan));
- swrast->PointSpan.end = 0;
- }
-}
-
-void
-_swrast_render_primitive( struct gl_context *ctx, GLenum prim )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- if (swrast->Primitive == GL_POINTS && prim != GL_POINTS) {
- _swrast_flush(ctx);
- }
- swrast->Primitive = prim;
-}
-
-
-void
-_swrast_render_start( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- if (swrast->Driver.SpanRenderStart)
- swrast->Driver.SpanRenderStart( ctx );
- swrast->PointSpan.end = 0;
-}
-
-void
-_swrast_render_finish( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- if (swrast->Driver.SpanRenderFinish)
- swrast->Driver.SpanRenderFinish( ctx );
-
- _swrast_flush(ctx);
-}
-
-
-#define SWRAST_DEBUG_VERTICES 0
-
-void
-_swrast_print_vertex( struct gl_context *ctx, const SWvertex *v )
-{
- GLuint i;
-
- if (SWRAST_DEBUG_VERTICES) {
- _mesa_debug(ctx, "win %f %f %f %f\n",
- v->attrib[FRAG_ATTRIB_WPOS][0],
- v->attrib[FRAG_ATTRIB_WPOS][1],
- v->attrib[FRAG_ATTRIB_WPOS][2],
- v->attrib[FRAG_ATTRIB_WPOS][3]);
-
- for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)
- if (ctx->Texture.Unit[i]._ReallyEnabled)
- _mesa_debug(ctx, "texcoord[%d] %f %f %f %f\n", i,
- v->attrib[FRAG_ATTRIB_TEX0 + i][0],
- v->attrib[FRAG_ATTRIB_TEX0 + i][1],
- v->attrib[FRAG_ATTRIB_TEX0 + i][2],
- v->attrib[FRAG_ATTRIB_TEX0 + i][3]);
-
-#if CHAN_TYPE == GL_FLOAT
- _mesa_debug(ctx, "color %f %f %f %f\n",
- v->color[0], v->color[1], v->color[2], v->color[3]);
-#else
- _mesa_debug(ctx, "color %d %d %d %d\n",
- v->color[0], v->color[1], v->color[2], v->color[3]);
-#endif
- _mesa_debug(ctx, "spec %g %g %g %g\n",
- v->attrib[FRAG_ATTRIB_COL1][0],
- v->attrib[FRAG_ATTRIB_COL1][1],
- v->attrib[FRAG_ATTRIB_COL1][2],
- v->attrib[FRAG_ATTRIB_COL1][3]);
- _mesa_debug(ctx, "fog %f\n", v->attrib[FRAG_ATTRIB_FOGC][0]);
- _mesa_debug(ctx, "index %f\n", v->attrib[FRAG_ATTRIB_CI][0]);
- _mesa_debug(ctx, "pointsize %f\n", v->pointSize);
- _mesa_debug(ctx, "\n");
- }
-}
+/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Keith Whitwell <keith@tungstengraphics.com>
+ * Brian Paul
+ */
+
+#include "main/imports.h"
+#include "main/bufferobj.h"
+#include "main/colormac.h"
+#include "main/mtypes.h"
+#include "main/teximage.h"
+#include "program/prog_parameter.h"
+#include "program/prog_statevars.h"
+#include "swrast.h"
+#include "s_blend.h"
+#include "s_context.h"
+#include "s_lines.h"
+#include "s_points.h"
+#include "s_span.h"
+#include "s_triangle.h"
+#include "s_texfilter.h"
+
+
+/**
+ * Recompute the value of swrast->_RasterMask, etc. according to
+ * the current context. The _RasterMask field can be easily tested by
+ * drivers to determine certain basic GL state (does the primitive need
+ * stenciling, logic-op, fog, etc?).
+ */
+static void
+_swrast_update_rasterflags( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLbitfield rasterMask = 0;
+ GLuint i;
+
+ if (ctx->Color.AlphaEnabled) rasterMask |= ALPHATEST_BIT;
+ if (ctx->Color.BlendEnabled) rasterMask |= BLEND_BIT;
+ if (ctx->Depth.Test) rasterMask |= DEPTH_BIT;
+ if (swrast->_FogEnabled) rasterMask |= FOG_BIT;
+ if (ctx->Scissor.Enabled) rasterMask |= CLIP_BIT;
+ if (ctx->Stencil._Enabled) rasterMask |= STENCIL_BIT;
+ for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+ if (!ctx->Color.ColorMask[i][0] ||
+ !ctx->Color.ColorMask[i][1] ||
+ !ctx->Color.ColorMask[i][2] ||
+ !ctx->Color.ColorMask[i][3]) {
+ rasterMask |= MASKING_BIT;
+ break;
+ }
+ }
+ if (ctx->Color._LogicOpEnabled) rasterMask |= LOGIC_OP_BIT;
+ if (ctx->Texture._EnabledUnits) rasterMask |= TEXTURE_BIT;
+ if ( ctx->Viewport.X < 0
+ || ctx->Viewport.X + ctx->Viewport.Width > (GLint) ctx->DrawBuffer->Width
+ || ctx->Viewport.Y < 0
+ || ctx->Viewport.Y + ctx->Viewport.Height > (GLint) ctx->DrawBuffer->Height) {
+ rasterMask |= CLIP_BIT;
+ }
+
+ if (ctx->Query.CurrentOcclusionObject)
+ rasterMask |= OCCLUSION_BIT;
+
+
+ /* If we're not drawing to exactly one color buffer set the
+ * MULTI_DRAW_BIT flag. Also set it if we're drawing to no
+ * buffers or the RGBA or CI mask disables all writes.
+ */
+ if (ctx->DrawBuffer->_NumColorDrawBuffers != 1) {
+ /* more than one color buffer designated for writing (or zero buffers) */
+ rasterMask |= MULTI_DRAW_BIT;
+ }
+
+ for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+ if (ctx->Color.ColorMask[i][0] +
+ ctx->Color.ColorMask[i][1] +
+ ctx->Color.ColorMask[i][2] +
+ ctx->Color.ColorMask[i][3] == 0) {
+ rasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */
+ break;
+ }
+ }
+
+
+ if (ctx->FragmentProgram._Current) {
+ rasterMask |= FRAGPROG_BIT;
+ }
+
+ if (ctx->ATIFragmentShader._Enabled) {
+ rasterMask |= ATIFRAGSHADER_BIT;
+ }
+
+#if CHAN_TYPE == GL_FLOAT
+ if (ctx->Color.ClampFragmentColor == GL_TRUE) {
+ rasterMask |= CLAMPING_BIT;
+ }
+#endif
+
+ SWRAST_CONTEXT(ctx)->_RasterMask = rasterMask;
+}
+
+
+/**
+ * Examine polygon cull state to compute the _BackfaceCullSign field.
+ * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,
+ * and 1 if culling front-faces. The Polygon FrontFace state also
+ * factors in.
+ */
+static void
+_swrast_update_polygon( struct gl_context *ctx )
+{
+ GLfloat backface_sign;
+
+ if (ctx->Polygon.CullFlag) {
+ switch (ctx->Polygon.CullFaceMode) {
+ case GL_BACK:
+ backface_sign = -1.0F;
+ break;
+ case GL_FRONT:
+ backface_sign = 1.0F;
+ break;
+ case GL_FRONT_AND_BACK:
+ /* fallthrough */
+ default:
+ backface_sign = 0.0F;
+ }
+ }
+ else {
+ backface_sign = 0.0F;
+ }
+
+ SWRAST_CONTEXT(ctx)->_BackfaceCullSign = backface_sign;
+
+ /* This is for front/back-face determination, but not for culling */
+ SWRAST_CONTEXT(ctx)->_BackfaceSign
+ = (ctx->Polygon.FrontFace == GL_CW) ? -1.0F : 1.0F;
+}
+
+
+
+/**
+ * Update the _PreferPixelFog field to indicate if we need to compute
+ * fog blend factors (from the fog coords) per-fragment.
+ */
+static void
+_swrast_update_fog_hint( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ swrast->_PreferPixelFog = (!swrast->AllowVertexFog ||
+ ctx->FragmentProgram._Current ||
+ (ctx->Hint.Fog == GL_NICEST &&
+ swrast->AllowPixelFog));
+}
+
+
+
+/**
+ * Update the swrast->_TextureCombinePrimary flag.
+ */
+static void
+_swrast_update_texture_env( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint i;
+
+ swrast->_TextureCombinePrimary = GL_FALSE;
+
+ for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
+ const struct gl_tex_env_combine_state *combine =
+ ctx->Texture.Unit[i]._CurrentCombine;
+ GLuint term;
+ for (term = 0; term < combine->_NumArgsRGB; term++) {
+ if (combine->SourceRGB[term] == GL_PRIMARY_COLOR) {
+ swrast->_TextureCombinePrimary = GL_TRUE;
+ return;
+ }
+ if (combine->SourceA[term] == GL_PRIMARY_COLOR) {
+ swrast->_TextureCombinePrimary = GL_TRUE;
+ return;
+ }
+ }
+ }
+}
+
+
+/**
+ * Determine if we can defer texturing/shading until after Z/stencil
+ * testing. This potentially allows us to skip texturing/shading for
+ * lots of fragments.
+ */
+static void
+_swrast_update_deferred_texture(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (ctx->Color.AlphaEnabled) {
+ /* alpha test depends on post-texture/shader colors */
+ swrast->_DeferredTexture = GL_FALSE;
+ }
+ else {
+ const struct gl_fragment_program *fprog
+ = ctx->FragmentProgram._Current;
+ if (fprog && (fprog->Base.OutputsWritten & (1 << FRAG_RESULT_DEPTH))) {
+ /* Z comes from fragment program/shader */
+ swrast->_DeferredTexture = GL_FALSE;
+ }
+ else if (fprog && fprog->UsesKill) {
+ swrast->_DeferredTexture = GL_FALSE;
+ }
+ else if (ctx->Query.CurrentOcclusionObject) {
+ /* occlusion query depends on shader discard/kill results */
+ swrast->_DeferredTexture = GL_FALSE;
+ }
+ else {
+ swrast->_DeferredTexture = GL_TRUE;
+ }
+ }
+}
+
+
+/**
+ * Update swrast->_FogColor and swrast->_FogEnable values.
+ */
+static void
+_swrast_update_fog_state( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
+
+ assert((fp == NULL) || (fp->Base.Target == GL_FRAGMENT_PROGRAM_ARB));
+
+ /* determine if fog is needed, and if so, which fog mode */
+ swrast->_FogEnabled = (fp == NULL && ctx->Fog.Enabled);
+}
+
+
+/**
+ * Update state for running fragment programs. Basically, load the
+ * program parameters with current state values.
+ */
+static void
+_swrast_update_fragment_program(struct gl_context *ctx, GLbitfield newState)
+{
+ const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
+ if (fp) {
+ _mesa_load_state_parameters(ctx, fp->Base.Parameters);
+ }
+}
+
+
+/**
+ * See if we can do early diffuse+specular (primary+secondary) color
+ * add per vertex instead of per-fragment.
+ */
+static void
+_swrast_update_specular_vertex_add(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLboolean separateSpecular = ctx->Fog.ColorSumEnabled ||
+ (ctx->Light.Enabled &&
+ ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR);
+
+ swrast->SpecularVertexAdd = (separateSpecular
+ && ctx->Texture._EnabledUnits == 0x0
+ && !ctx->FragmentProgram._Current
+ && !ctx->ATIFragmentShader._Enabled);
+}
+
+
+#define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK | \
+ _NEW_PROGRAM_CONSTANTS | \
+ _NEW_TEXTURE | \
+ _NEW_HINT | \
+ _NEW_POLYGON )
+
+/* State referenced by _swrast_choose_triangle, _swrast_choose_line.
+ */
+#define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED | \
+ _NEW_RENDERMODE| \
+ _NEW_POLYGON| \
+ _NEW_DEPTH| \
+ _NEW_STENCIL| \
+ _NEW_COLOR| \
+ _NEW_TEXTURE| \
+ _SWRAST_NEW_RASTERMASK| \
+ _NEW_LIGHT| \
+ _NEW_FOG | \
+ _DD_NEW_SEPARATE_SPECULAR)
+
+#define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED | \
+ _NEW_RENDERMODE| \
+ _NEW_LINE| \
+ _NEW_TEXTURE| \
+ _NEW_LIGHT| \
+ _NEW_FOG| \
+ _NEW_DEPTH | \
+ _DD_NEW_SEPARATE_SPECULAR)
+
+#define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED | \
+ _NEW_RENDERMODE | \
+ _NEW_POINT | \
+ _NEW_TEXTURE | \
+ _NEW_LIGHT | \
+ _NEW_FOG | \
+ _DD_NEW_SEPARATE_SPECULAR)
+
+#define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
+
+#define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
+
+#define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
+
+
+
+/**
+ * Stub for swrast->Triangle to select a true triangle function
+ * after a state change.
+ */
+static void
+_swrast_validate_triangle( struct gl_context *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2 )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ _swrast_validate_derived( ctx );
+ swrast->choose_triangle( ctx );
+ ASSERT(swrast->Triangle);
+
+ if (swrast->SpecularVertexAdd) {
+ /* separate specular color, but no texture */
+ swrast->SpecTriangle = swrast->Triangle;
+ swrast->Triangle = _swrast_add_spec_terms_triangle;
+ }
+
+ swrast->Triangle( ctx, v0, v1, v2 );
+}
+
+/**
+ * Called via swrast->Line. Examine current GL state and choose a software
+ * line routine. Then call it.
+ */
+static void
+_swrast_validate_line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ _swrast_validate_derived( ctx );
+ swrast->choose_line( ctx );
+ ASSERT(swrast->Line);
+
+ if (swrast->SpecularVertexAdd) {
+ swrast->SpecLine = swrast->Line;
+ swrast->Line = _swrast_add_spec_terms_line;
+ }
+
+ swrast->Line( ctx, v0, v1 );
+}
+
+/**
+ * Called via swrast->Point. Examine current GL state and choose a software
+ * point routine. Then call it.
+ */
+static void
+_swrast_validate_point( struct gl_context *ctx, const SWvertex *v0 )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ _swrast_validate_derived( ctx );
+ swrast->choose_point( ctx );
+
+ if (swrast->SpecularVertexAdd) {
+ swrast->SpecPoint = swrast->Point;
+ swrast->Point = _swrast_add_spec_terms_point;
+ }
+
+ swrast->Point( ctx, v0 );
+}
+
+
+/**
+ * Called via swrast->BlendFunc. Examine GL state to choose a blending
+ * function, then call it.
+ */
+static void _ASMAPI
+_swrast_validate_blend_func(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst,
+ GLenum chanType )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ _swrast_validate_derived( ctx ); /* why is this needed? */
+ _swrast_choose_blend_func( ctx, chanType );
+
+ swrast->BlendFunc( ctx, n, mask, src, dst, chanType );
+}
+
+static void
+_swrast_sleep( struct gl_context *ctx, GLbitfield new_state )
+{
+ (void) ctx; (void) new_state;
+}
+
+
+static void
+_swrast_invalidate_state( struct gl_context *ctx, GLbitfield new_state )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint i;
+
+ swrast->NewState |= new_state;
+
+ /* After 10 statechanges without any swrast functions being called,
+ * put the module to sleep.
+ */
+ if (++swrast->StateChanges > 10) {
+ swrast->InvalidateState = _swrast_sleep;
+ swrast->NewState = ~0;
+ new_state = ~0;
+ }
+
+ if (new_state & swrast->InvalidateTriangleMask)
+ swrast->Triangle = _swrast_validate_triangle;
+
+ if (new_state & swrast->InvalidateLineMask)
+ swrast->Line = _swrast_validate_line;
+
+ if (new_state & swrast->InvalidatePointMask)
+ swrast->Point = _swrast_validate_point;
+
+ if (new_state & _SWRAST_NEW_BLEND_FUNC)
+ swrast->BlendFunc = _swrast_validate_blend_func;
+
+ if (new_state & _SWRAST_NEW_TEXTURE_SAMPLE_FUNC)
+ for (i = 0 ; i < ctx->Const.MaxTextureImageUnits ; i++)
+ swrast->TextureSample[i] = NULL;
+}
+
+
+void
+_swrast_update_texture_samplers(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint u;
+
+ if (!swrast)
+ return; /* pipe hack */
+
+ for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
+ const struct gl_texture_object *tObj = ctx->Texture.Unit[u]._Current;
+ /* Note: If tObj is NULL, the sample function will be a simple
+ * function that just returns opaque black (0,0,0,1).
+ */
+ swrast->TextureSample[u] = _swrast_choose_texture_sample_func(ctx, tObj);
+ }
+}
+
+
+/**
+ * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,
+ * swrast->_ActiveAtttribMask.
+ */
+static void
+_swrast_update_active_attribs(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLuint attribsMask;
+
+ /*
+ * Compute _ActiveAttribsMask = which fragment attributes are needed.
+ */
+ if (ctx->FragmentProgram._Current) {
+ /* fragment program/shader */
+ attribsMask = ctx->FragmentProgram._Current->Base.InputsRead;
+ attribsMask &= ~FRAG_BIT_WPOS; /* WPOS is always handled specially */
+ }
+ else if (ctx->ATIFragmentShader._Enabled) {
+ attribsMask = ~0; /* XXX fix me */
+ }
+ else {
+ /* fixed function */
+ attribsMask = 0x0;
+
+#if CHAN_TYPE == GL_FLOAT
+ attribsMask |= FRAG_BIT_COL0;
+#endif
+
+ if (ctx->Fog.ColorSumEnabled ||
+ (ctx->Light.Enabled &&
+ ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)) {
+ attribsMask |= FRAG_BIT_COL1;
+ }
+
+ if (swrast->_FogEnabled)
+ attribsMask |= FRAG_BIT_FOGC;
+
+ attribsMask |= (ctx->Texture._EnabledUnits << FRAG_ATTRIB_TEX0);
+ }
+
+ swrast->_ActiveAttribMask = attribsMask;
+
+ /* Update _ActiveAttribs[] list */
+ {
+ GLuint i, num = 0;
+ for (i = 0; i < FRAG_ATTRIB_MAX; i++) {
+ if (attribsMask & (1 << i)) {
+ swrast->_ActiveAttribs[num++] = i;
+ /* how should this attribute be interpolated? */
+ if (i == FRAG_ATTRIB_COL0 || i == FRAG_ATTRIB_COL1)
+ swrast->_InterpMode[i] = ctx->Light.ShadeModel;
+ else
+ swrast->_InterpMode[i] = GL_SMOOTH;
+ }
+ }
+ swrast->_NumActiveAttribs = num;
+ }
+}
+
+
+void
+_swrast_validate_derived( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ if (swrast->NewState) {
+ if (swrast->NewState & _NEW_POLYGON)
+ _swrast_update_polygon( ctx );
+
+ if (swrast->NewState & (_NEW_HINT | _NEW_PROGRAM))
+ _swrast_update_fog_hint( ctx );
+
+ if (swrast->NewState & _SWRAST_NEW_TEXTURE_ENV_MODE)
+ _swrast_update_texture_env( ctx );
+
+ if (swrast->NewState & (_NEW_FOG | _NEW_PROGRAM))
+ _swrast_update_fog_state( ctx );
+
+ if (swrast->NewState & (_NEW_PROGRAM_CONSTANTS | _NEW_PROGRAM))
+ _swrast_update_fragment_program( ctx, swrast->NewState );
+
+ if (swrast->NewState & (_NEW_TEXTURE | _NEW_PROGRAM)) {
+ _swrast_update_texture_samplers( ctx );
+ }
+
+ if (swrast->NewState & (_NEW_COLOR | _NEW_PROGRAM))
+ _swrast_update_deferred_texture(ctx);
+
+ if (swrast->NewState & _SWRAST_NEW_RASTERMASK)
+ _swrast_update_rasterflags( ctx );
+
+ if (swrast->NewState & (_NEW_DEPTH |
+ _NEW_FOG |
+ _NEW_LIGHT |
+ _NEW_PROGRAM |
+ _NEW_TEXTURE))
+ _swrast_update_active_attribs(ctx);
+
+ if (swrast->NewState & (_NEW_FOG |
+ _NEW_PROGRAM |
+ _NEW_LIGHT |
+ _NEW_TEXTURE))
+ _swrast_update_specular_vertex_add(ctx);
+
+ swrast->NewState = 0;
+ swrast->StateChanges = 0;
+ swrast->InvalidateState = _swrast_invalidate_state;
+ }
+}
+
+#define SWRAST_DEBUG 0
+
+/* Public entrypoints: See also s_accum.c, s_bitmap.c, etc.
+ */
+void
+_swrast_Quad( struct gl_context *ctx,
+ const SWvertex *v0, const SWvertex *v1,
+ const SWvertex *v2, const SWvertex *v3 )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_Quad\n");
+ _swrast_print_vertex( ctx, v0 );
+ _swrast_print_vertex( ctx, v1 );
+ _swrast_print_vertex( ctx, v2 );
+ _swrast_print_vertex( ctx, v3 );
+ }
+ SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v3 );
+ SWRAST_CONTEXT(ctx)->Triangle( ctx, v1, v2, v3 );
+}
+
+void
+_swrast_Triangle( struct gl_context *ctx, const SWvertex *v0,
+ const SWvertex *v1, const SWvertex *v2 )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_Triangle\n");
+ _swrast_print_vertex( ctx, v0 );
+ _swrast_print_vertex( ctx, v1 );
+ _swrast_print_vertex( ctx, v2 );
+ }
+ SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v2 );
+}
+
+void
+_swrast_Line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_Line\n");
+ _swrast_print_vertex( ctx, v0 );
+ _swrast_print_vertex( ctx, v1 );
+ }
+ SWRAST_CONTEXT(ctx)->Line( ctx, v0, v1 );
+}
+
+void
+_swrast_Point( struct gl_context *ctx, const SWvertex *v0 )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_Point\n");
+ _swrast_print_vertex( ctx, v0 );
+ }
+ SWRAST_CONTEXT(ctx)->Point( ctx, v0 );
+}
+
+void
+_swrast_InvalidateState( struct gl_context *ctx, GLbitfield new_state )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_InvalidateState\n");
+ }
+ SWRAST_CONTEXT(ctx)->InvalidateState( ctx, new_state );
+}
+
+void
+_swrast_ResetLineStipple( struct gl_context *ctx )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_ResetLineStipple\n");
+ }
+ SWRAST_CONTEXT(ctx)->StippleCounter = 0;
+}
+
+void
+_swrast_SetFacing(struct gl_context *ctx, GLuint facing)
+{
+ SWRAST_CONTEXT(ctx)->PointLineFacing = facing;
+}
+
+void
+_swrast_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_allow_vertex_fog %d\n", value);
+ }
+ SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );
+ SWRAST_CONTEXT(ctx)->AllowVertexFog = value;
+}
+
+void
+_swrast_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
+{
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_allow_pixel_fog %d\n", value);
+ }
+ SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );
+ SWRAST_CONTEXT(ctx)->AllowPixelFog = value;
+}
+
+
+/**
+ * Initialize native program limits by copying the logical limits.
+ * See comments in init_program_limits() in context.c
+ */
+static void
+init_program_native_limits(struct gl_program_constants *prog)
+{
+ prog->MaxNativeInstructions = prog->MaxInstructions;
+ prog->MaxNativeAluInstructions = prog->MaxAluInstructions;
+ prog->MaxNativeTexInstructions = prog->MaxTexInstructions;
+ prog->MaxNativeTexIndirections = prog->MaxTexIndirections;
+ prog->MaxNativeAttribs = prog->MaxAttribs;
+ prog->MaxNativeTemps = prog->MaxTemps;
+ prog->MaxNativeAddressRegs = prog->MaxAddressRegs;
+ prog->MaxNativeParameters = prog->MaxParameters;
+}
+
+
+GLboolean
+_swrast_CreateContext( struct gl_context *ctx )
+{
+ GLuint i;
+ SWcontext *swrast = (SWcontext *)CALLOC(sizeof(SWcontext));
+#ifdef _OPENMP
+ const GLint maxThreads = omp_get_max_threads();
+#else
+ const GLint maxThreads = 1;
+#endif
+
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_CreateContext\n");
+ }
+
+ if (!swrast)
+ return GL_FALSE;
+
+ swrast->NewState = ~0;
+
+ swrast->choose_point = _swrast_choose_point;
+ swrast->choose_line = _swrast_choose_line;
+ swrast->choose_triangle = _swrast_choose_triangle;
+
+ swrast->InvalidatePointMask = _SWRAST_NEW_POINT;
+ swrast->InvalidateLineMask = _SWRAST_NEW_LINE;
+ swrast->InvalidateTriangleMask = _SWRAST_NEW_TRIANGLE;
+
+ swrast->Point = _swrast_validate_point;
+ swrast->Line = _swrast_validate_line;
+ swrast->Triangle = _swrast_validate_triangle;
+ swrast->InvalidateState = _swrast_sleep;
+ swrast->BlendFunc = _swrast_validate_blend_func;
+
+ swrast->AllowVertexFog = GL_TRUE;
+ swrast->AllowPixelFog = GL_TRUE;
+
+ /* Optimized Accum buffer */
+ swrast->_IntegerAccumMode = GL_FALSE;
+ swrast->_IntegerAccumScaler = 0.0;
+
+ for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++)
+ swrast->TextureSample[i] = NULL;
+
+ /* SpanArrays is global and shared by all SWspan instances. However, when
+ * using multiple threads, it is necessary to have one SpanArrays instance
+ * per thread.
+ */
+ swrast->SpanArrays = (SWspanarrays *) MALLOC(maxThreads * sizeof(SWspanarrays));
+ if (!swrast->SpanArrays) {
+ FREE(swrast);
+ return GL_FALSE;
+ }
+ for(i = 0; i < maxThreads; i++) {
+ swrast->SpanArrays[i].ChanType = CHAN_TYPE;
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+ swrast->SpanArrays[i].rgba = swrast->SpanArrays[i].rgba8;
+#elif CHAN_TYPE == GL_UNSIGNED_SHORT
+ swrast->SpanArrays[i].rgba = swrast->SpanArrays[i].rgba16;
+#else
+ swrast->SpanArrays[i].rgba = swrast->SpanArrays[i].attribs[FRAG_ATTRIB_COL0];
+#endif
+ }
+
+ /* init point span buffer */
+ swrast->PointSpan.primitive = GL_POINT;
+ swrast->PointSpan.end = 0;
+ swrast->PointSpan.facing = 0;
+ swrast->PointSpan.array = swrast->SpanArrays;
+
+ /* TexelBuffer is also global and normally shared by all SWspan instances;
+ * when running with multiple threads, create one per thread.
+ */
+ swrast->TexelBuffer = (GLfloat *) MALLOC(ctx->Const.MaxTextureImageUnits * maxThreads *
+ MAX_WIDTH * 4 * sizeof(GLfloat));
+ if (!swrast->TexelBuffer) {
+ FREE(swrast->SpanArrays);
+ FREE(swrast);
+ return GL_FALSE;
+ }
+
+ init_program_native_limits(&ctx->Const.VertexProgram);
+ init_program_native_limits(&ctx->Const.GeometryProgram);
+ init_program_native_limits(&ctx->Const.FragmentProgram);
+
+ ctx->swrast_context = swrast;
+
+ return GL_TRUE;
+}
+
+void
+_swrast_DestroyContext( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ if (SWRAST_DEBUG) {
+ _mesa_debug(ctx, "_swrast_DestroyContext\n");
+ }
+
+ FREE( swrast->SpanArrays );
+ if (swrast->ZoomedArrays)
+ FREE( swrast->ZoomedArrays );
+ FREE( swrast->TexelBuffer );
+ FREE( swrast );
+
+ ctx->swrast_context = 0;
+}
+
+
+struct swrast_device_driver *
+_swrast_GetDeviceDriverReference( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ return &swrast->Driver;
+}
+
+void
+_swrast_flush( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ /* flush any pending fragments from rendering points */
+ if (swrast->PointSpan.end > 0) {
+ _swrast_write_rgba_span(ctx, &(swrast->PointSpan));
+ swrast->PointSpan.end = 0;
+ }
+}
+
+void
+_swrast_render_primitive( struct gl_context *ctx, GLenum prim )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Primitive == GL_POINTS && prim != GL_POINTS) {
+ _swrast_flush(ctx);
+ }
+ swrast->Primitive = prim;
+}
+
+
+void
+_swrast_render_start( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Driver.SpanRenderStart)
+ swrast->Driver.SpanRenderStart( ctx );
+ swrast->PointSpan.end = 0;
+}
+
+void
+_swrast_render_finish( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Driver.SpanRenderFinish)
+ swrast->Driver.SpanRenderFinish( ctx );
+
+ _swrast_flush(ctx);
+}
+
+
+#define SWRAST_DEBUG_VERTICES 0
+
+void
+_swrast_print_vertex( struct gl_context *ctx, const SWvertex *v )
+{
+ GLuint i;
+
+ if (SWRAST_DEBUG_VERTICES) {
+ _mesa_debug(ctx, "win %f %f %f %f\n",
+ v->attrib[FRAG_ATTRIB_WPOS][0],
+ v->attrib[FRAG_ATTRIB_WPOS][1],
+ v->attrib[FRAG_ATTRIB_WPOS][2],
+ v->attrib[FRAG_ATTRIB_WPOS][3]);
+
+ for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)
+ if (ctx->Texture.Unit[i]._ReallyEnabled)
+ _mesa_debug(ctx, "texcoord[%d] %f %f %f %f\n", i,
+ v->attrib[FRAG_ATTRIB_TEX0 + i][0],
+ v->attrib[FRAG_ATTRIB_TEX0 + i][1],
+ v->attrib[FRAG_ATTRIB_TEX0 + i][2],
+ v->attrib[FRAG_ATTRIB_TEX0 + i][3]);
+
+#if CHAN_TYPE == GL_FLOAT
+ _mesa_debug(ctx, "color %f %f %f %f\n",
+ v->color[0], v->color[1], v->color[2], v->color[3]);
+#else
+ _mesa_debug(ctx, "color %d %d %d %d\n",
+ v->color[0], v->color[1], v->color[2], v->color[3]);
+#endif
+ _mesa_debug(ctx, "spec %g %g %g %g\n",
+ v->attrib[FRAG_ATTRIB_COL1][0],
+ v->attrib[FRAG_ATTRIB_COL1][1],
+ v->attrib[FRAG_ATTRIB_COL1][2],
+ v->attrib[FRAG_ATTRIB_COL1][3]);
+ _mesa_debug(ctx, "fog %f\n", v->attrib[FRAG_ATTRIB_FOGC][0]);
+ _mesa_debug(ctx, "index %f\n", v->attrib[FRAG_ATTRIB_CI][0]);
+ _mesa_debug(ctx, "pointsize %f\n", v->pointSize);
+ _mesa_debug(ctx, "\n");
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_context.h b/mesalib/src/mesa/swrast/s_context.h
index 1673cece1..8d7458c2d 100644
--- a/mesalib/src/mesa/swrast/s_context.h
+++ b/mesalib/src/mesa/swrast/s_context.h
@@ -1,348 +1,348 @@
-/*
- * Mesa 3-D graphics library
- * Version: 6.5.3
- *
- * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-/**
- * \file swrast/s_context.h
- * \brief Software rasterization context and private types.
- * \author Keith Whitwell <keith@tungstengraphics.com>
- */
-
-/**
- * \mainpage swrast module
- *
- * This module, software rasterization, contains the software fallback
- * routines for drawing points, lines, triangles, bitmaps and images.
- * All rendering boils down to writing spans (arrays) of pixels with
- * particular colors. The span-writing routines must be implemented
- * by the device driver.
- */
-
-
-#ifndef S_CONTEXT_H
-#define S_CONTEXT_H
-
-#include "main/compiler.h"
-#include "main/mtypes.h"
-#include "program/prog_execute.h"
-#include "swrast.h"
-#include "s_span.h"
-
-
-typedef void (*texture_sample_func)(struct gl_context *ctx,
- const struct gl_texture_object *tObj,
- GLuint n, const GLfloat texcoords[][4],
- const GLfloat lambda[], GLfloat rgba[][4]);
-
-typedef void (_ASMAPIP blend_func)( struct gl_context *ctx, GLuint n,
- const GLubyte mask[],
- GLvoid *src, const GLvoid *dst,
- GLenum chanType);
-
-typedef void (*swrast_point_func)( struct gl_context *ctx, const SWvertex *);
-
-typedef void (*swrast_line_func)( struct gl_context *ctx,
- const SWvertex *, const SWvertex *);
-
-typedef void (*swrast_tri_func)( struct gl_context *ctx, const SWvertex *,
- const SWvertex *, const SWvertex *);
-
-
-typedef void (*validate_texture_image_func)(struct gl_context *ctx,
- struct gl_texture_object *texObj,
- GLuint face, GLuint level);
-
-
-/**
- * \defgroup Bitmasks
- * Bitmasks to indicate which rasterization options are enabled
- * (RasterMask)
- */
-/*@{*/
-#define ALPHATEST_BIT 0x001 /**< Alpha-test pixels */
-#define BLEND_BIT 0x002 /**< Blend pixels */
-#define DEPTH_BIT 0x004 /**< Depth-test pixels */
-#define FOG_BIT 0x008 /**< Fog pixels */
-#define LOGIC_OP_BIT 0x010 /**< Apply logic op in software */
-#define CLIP_BIT 0x020 /**< Scissor or window clip pixels */
-#define STENCIL_BIT 0x040 /**< Stencil pixels */
-#define MASKING_BIT 0x080 /**< Do glColorMask or glIndexMask */
-#define MULTI_DRAW_BIT 0x400 /**< Write to more than one color- */
- /**< buffer or no buffers. */
-#define OCCLUSION_BIT 0x800 /**< GL_HP_occlusion_test enabled */
-#define TEXTURE_BIT 0x1000 /**< Texturing really enabled */
-#define FRAGPROG_BIT 0x2000 /**< Fragment program enabled */
-#define ATIFRAGSHADER_BIT 0x4000 /**< ATI Fragment shader enabled */
-#define CLAMPING_BIT 0x8000 /**< Clamp colors to [0,1] */
-/*@}*/
-
-#define _SWRAST_NEW_RASTERMASK (_NEW_BUFFERS| \
- _NEW_SCISSOR| \
- _NEW_COLOR| \
- _NEW_DEPTH| \
- _NEW_FOG| \
- _NEW_PROGRAM| \
- _NEW_STENCIL| \
- _NEW_TEXTURE| \
- _NEW_VIEWPORT| \
- _NEW_DEPTH)
-
-
-/**
- * \struct SWcontext
- * \brief Per-context state that's private to the software rasterizer module.
- */
-typedef struct
-{
- /** Driver interface:
- */
- struct swrast_device_driver Driver;
-
- /** Configuration mechanisms to make software rasterizer match
- * characteristics of the hardware rasterizer (if present):
- */
- GLboolean AllowVertexFog;
- GLboolean AllowPixelFog;
-
- /** Derived values, invalidated on statechanges, updated from
- * _swrast_validate_derived():
- */
- GLbitfield _RasterMask;
- GLfloat _BackfaceSign; /** +1 or -1 */
- GLfloat _BackfaceCullSign; /** +1, 0, or -1 */
- GLboolean _PreferPixelFog; /* Compute fog blend factor per fragment? */
- GLboolean _TextureCombinePrimary;
- GLboolean _FogEnabled;
- GLboolean _DeferredTexture;
-
- /** List/array of the fragment attributes to interpolate */
- GLuint _ActiveAttribs[FRAG_ATTRIB_MAX];
- /** Same info, but as a bitmask */
- GLbitfield _ActiveAttribMask;
- /** Number of fragment attributes to interpolate */
- GLuint _NumActiveAttribs;
- /** Indicates how each attrib is to be interpolated (lines/tris) */
- GLenum _InterpMode[FRAG_ATTRIB_MAX]; /* GL_FLAT or GL_SMOOTH (for now) */
-
- /* Accum buffer temporaries.
- */
- GLboolean _IntegerAccumMode; /**< Storing unscaled integers? */
- GLfloat _IntegerAccumScaler; /**< Implicit scale factor */
-
- /* Working values:
- */
- GLuint StippleCounter; /**< Line stipple counter */
- GLuint PointLineFacing;
- GLbitfield NewState;
- GLuint StateChanges;
- GLenum Primitive; /* current primitive being drawn (ala glBegin) */
- GLboolean SpecularVertexAdd; /**< Add specular/secondary color per vertex */
-
- void (*InvalidateState)( struct gl_context *ctx, GLbitfield new_state );
-
- /**
- * When the NewState mask intersects these masks, we invalidate the
- * Point/Line/Triangle function pointers below.
- */
- /*@{*/
- GLbitfield InvalidatePointMask;
- GLbitfield InvalidateLineMask;
- GLbitfield InvalidateTriangleMask;
- /*@}*/
-
- /**
- * Device drivers plug in functions for these callbacks.
- * Will be called when the GL state change mask intersects the above masks.
- */
- /*@{*/
- void (*choose_point)( struct gl_context * );
- void (*choose_line)( struct gl_context * );
- void (*choose_triangle)( struct gl_context * );
- /*@}*/
-
- /**
- * Current point, line and triangle drawing functions.
- */
- /*@{*/
- swrast_point_func Point;
- swrast_line_func Line;
- swrast_tri_func Triangle;
- /*@}*/
-
- /**
- * Placeholders for when separate specular (or secondary color) is
- * enabled but texturing is not.
- */
- /*@{*/
- swrast_point_func SpecPoint;
- swrast_line_func SpecLine;
- swrast_tri_func SpecTriangle;
- /*@}*/
-
- /**
- * Typically, we'll allocate a sw_span structure as a local variable
- * and set its 'array' pointer to point to this object. The reason is
- * this object is big and causes problems when allocated on the stack
- * on some systems.
- */
- SWspanarrays *SpanArrays;
- SWspanarrays *ZoomedArrays; /**< For pixel zooming */
-
- /**
- * Used to buffer N GL_POINTS, instead of rendering one by one.
- */
- SWspan PointSpan;
-
- /** Internal hooks, kept up to date by the same mechanism as above.
- */
- blend_func BlendFunc;
- texture_sample_func TextureSample[MAX_TEXTURE_IMAGE_UNITS];
-
- /** Buffer for saving the sampled texture colors.
- * Needed for GL_ARB_texture_env_crossbar implementation.
- */
- GLfloat *TexelBuffer;
-
- validate_texture_image_func ValidateTextureImage;
-
- /** State used during execution of fragment programs */
- struct gl_program_machine FragProgMachine;
-
-} SWcontext;
-
-
-extern void
-_swrast_validate_derived( struct gl_context *ctx );
-
-extern void
-_swrast_update_texture_samplers(struct gl_context *ctx);
-
-
-/** Return SWcontext for the given struct gl_context */
-static INLINE SWcontext *
-SWRAST_CONTEXT(struct gl_context *ctx)
-{
- return (SWcontext *) ctx->swrast_context;
-}
-
-/** const version of above */
-static INLINE const SWcontext *
-CONST_SWRAST_CONTEXT(const struct gl_context *ctx)
-{
- return (const SWcontext *) ctx->swrast_context;
-}
-
-
-/**
- * Called prior to framebuffer reading/writing.
- * For drivers that rely on swrast for fallback rendering, this is the
- * driver's opportunity to map renderbuffers and textures.
- */
-static INLINE void
-swrast_render_start(struct gl_context *ctx)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- if (swrast->Driver.SpanRenderStart)
- swrast->Driver.SpanRenderStart(ctx);
-}
-
-
-/** Called after framebuffer reading/writing */
-static INLINE void
-swrast_render_finish(struct gl_context *ctx)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- if (swrast->Driver.SpanRenderFinish)
- swrast->Driver.SpanRenderFinish(ctx);
-}
-
-
-
-/**
- * Size of an RGBA pixel, in bytes, for given datatype.
- */
-#define RGBA_PIXEL_SIZE(TYPE) \
- ((TYPE == GL_UNSIGNED_BYTE) ? 4 * sizeof(GLubyte) : \
- ((TYPE == GL_UNSIGNED_SHORT) ? 4 * sizeof(GLushort) \
- : 4 * sizeof(GLfloat)))
-
-
-
-/*
- * Fixed point arithmetic macros
- */
-#ifndef FIXED_FRAC_BITS
-#define FIXED_FRAC_BITS 11
-#endif
-
-#define FIXED_SHIFT FIXED_FRAC_BITS
-#define FIXED_ONE (1 << FIXED_SHIFT)
-#define FIXED_HALF (1 << (FIXED_SHIFT-1))
-#define FIXED_FRAC_MASK (FIXED_ONE - 1)
-#define FIXED_INT_MASK (~FIXED_FRAC_MASK)
-#define FIXED_EPSILON 1
-#define FIXED_SCALE ((float) FIXED_ONE)
-#define FIXED_DBL_SCALE ((double) FIXED_ONE)
-#define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
-#define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
-#define IntToFixed(I) ((I) << FIXED_SHIFT)
-#define FixedToInt(X) ((X) >> FIXED_SHIFT)
-#define FixedToUns(X) (((unsigned int)(X)) >> FIXED_SHIFT)
-#define FixedCeil(X) (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
-#define FixedFloor(X) ((X) & FIXED_INT_MASK)
-#define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
-#define PosFloatToFixed(X) FloatToFixed(X)
-#define SignedFloatToFixed(X) FloatToFixed(X)
-
-
-
-/*
- * XXX these macros are just bandages for now in order to make
- * CHAN_BITS==32 compile cleanly.
- * These should probably go elsewhere at some point.
- */
-#if CHAN_TYPE == GL_FLOAT
-#define ChanToFixed(X) (X)
-#define FixedToChan(X) (X)
-#else
-#define ChanToFixed(X) IntToFixed(X)
-#define FixedToChan(X) FixedToInt(X)
-#endif
-
-
-/**
- * For looping over fragment attributes in the pointe, line
- * triangle rasterizers.
- */
-#define ATTRIB_LOOP_BEGIN \
- { \
- GLuint a; \
- for (a = 0; a < swrast->_NumActiveAttribs; a++) { \
- const GLuint attr = swrast->_ActiveAttribs[a];
-
-#define ATTRIB_LOOP_END } }
-
-
-
-#endif
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.3
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * \file swrast/s_context.h
+ * \brief Software rasterization context and private types.
+ * \author Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+/**
+ * \mainpage swrast module
+ *
+ * This module, software rasterization, contains the software fallback
+ * routines for drawing points, lines, triangles, bitmaps and images.
+ * All rendering boils down to writing spans (arrays) of pixels with
+ * particular colors. The span-writing routines must be implemented
+ * by the device driver.
+ */
+
+
+#ifndef S_CONTEXT_H
+#define S_CONTEXT_H
+
+#include "main/compiler.h"
+#include "main/mtypes.h"
+#include "program/prog_execute.h"
+#include "swrast.h"
+#include "s_span.h"
+
+
+typedef void (*texture_sample_func)(struct gl_context *ctx,
+ const struct gl_texture_object *tObj,
+ GLuint n, const GLfloat texcoords[][4],
+ const GLfloat lambda[], GLfloat rgba[][4]);
+
+typedef void (_ASMAPIP blend_func)( struct gl_context *ctx, GLuint n,
+ const GLubyte mask[],
+ GLvoid *src, const GLvoid *dst,
+ GLenum chanType);
+
+typedef void (*swrast_point_func)( struct gl_context *ctx, const SWvertex *);
+
+typedef void (*swrast_line_func)( struct gl_context *ctx,
+ const SWvertex *, const SWvertex *);
+
+typedef void (*swrast_tri_func)( struct gl_context *ctx, const SWvertex *,
+ const SWvertex *, const SWvertex *);
+
+
+typedef void (*validate_texture_image_func)(struct gl_context *ctx,
+ struct gl_texture_object *texObj,
+ GLuint face, GLuint level);
+
+
+/**
+ * \defgroup Bitmasks
+ * Bitmasks to indicate which rasterization options are enabled
+ * (RasterMask)
+ */
+/*@{*/
+#define ALPHATEST_BIT 0x001 /**< Alpha-test pixels */
+#define BLEND_BIT 0x002 /**< Blend pixels */
+#define DEPTH_BIT 0x004 /**< Depth-test pixels */
+#define FOG_BIT 0x008 /**< Fog pixels */
+#define LOGIC_OP_BIT 0x010 /**< Apply logic op in software */
+#define CLIP_BIT 0x020 /**< Scissor or window clip pixels */
+#define STENCIL_BIT 0x040 /**< Stencil pixels */
+#define MASKING_BIT 0x080 /**< Do glColorMask or glIndexMask */
+#define MULTI_DRAW_BIT 0x400 /**< Write to more than one color- */
+ /**< buffer or no buffers. */
+#define OCCLUSION_BIT 0x800 /**< GL_HP_occlusion_test enabled */
+#define TEXTURE_BIT 0x1000 /**< Texturing really enabled */
+#define FRAGPROG_BIT 0x2000 /**< Fragment program enabled */
+#define ATIFRAGSHADER_BIT 0x4000 /**< ATI Fragment shader enabled */
+#define CLAMPING_BIT 0x8000 /**< Clamp colors to [0,1] */
+/*@}*/
+
+#define _SWRAST_NEW_RASTERMASK (_NEW_BUFFERS| \
+ _NEW_SCISSOR| \
+ _NEW_COLOR| \
+ _NEW_DEPTH| \
+ _NEW_FOG| \
+ _NEW_PROGRAM| \
+ _NEW_STENCIL| \
+ _NEW_TEXTURE| \
+ _NEW_VIEWPORT| \
+ _NEW_DEPTH)
+
+
+/**
+ * \struct SWcontext
+ * \brief Per-context state that's private to the software rasterizer module.
+ */
+typedef struct
+{
+ /** Driver interface:
+ */
+ struct swrast_device_driver Driver;
+
+ /** Configuration mechanisms to make software rasterizer match
+ * characteristics of the hardware rasterizer (if present):
+ */
+ GLboolean AllowVertexFog;
+ GLboolean AllowPixelFog;
+
+ /** Derived values, invalidated on statechanges, updated from
+ * _swrast_validate_derived():
+ */
+ GLbitfield _RasterMask;
+ GLfloat _BackfaceSign; /** +1 or -1 */
+ GLfloat _BackfaceCullSign; /** +1, 0, or -1 */
+ GLboolean _PreferPixelFog; /* Compute fog blend factor per fragment? */
+ GLboolean _TextureCombinePrimary;
+ GLboolean _FogEnabled;
+ GLboolean _DeferredTexture;
+
+ /** List/array of the fragment attributes to interpolate */
+ GLuint _ActiveAttribs[FRAG_ATTRIB_MAX];
+ /** Same info, but as a bitmask */
+ GLbitfield _ActiveAttribMask;
+ /** Number of fragment attributes to interpolate */
+ GLuint _NumActiveAttribs;
+ /** Indicates how each attrib is to be interpolated (lines/tris) */
+ GLenum _InterpMode[FRAG_ATTRIB_MAX]; /* GL_FLAT or GL_SMOOTH (for now) */
+
+ /* Accum buffer temporaries.
+ */
+ GLboolean _IntegerAccumMode; /**< Storing unscaled integers? */
+ GLfloat _IntegerAccumScaler; /**< Implicit scale factor */
+
+ /* Working values:
+ */
+ GLuint StippleCounter; /**< Line stipple counter */
+ GLuint PointLineFacing;
+ GLbitfield NewState;
+ GLuint StateChanges;
+ GLenum Primitive; /* current primitive being drawn (ala glBegin) */
+ GLboolean SpecularVertexAdd; /**< Add specular/secondary color per vertex */
+
+ void (*InvalidateState)( struct gl_context *ctx, GLbitfield new_state );
+
+ /**
+ * When the NewState mask intersects these masks, we invalidate the
+ * Point/Line/Triangle function pointers below.
+ */
+ /*@{*/
+ GLbitfield InvalidatePointMask;
+ GLbitfield InvalidateLineMask;
+ GLbitfield InvalidateTriangleMask;
+ /*@}*/
+
+ /**
+ * Device drivers plug in functions for these callbacks.
+ * Will be called when the GL state change mask intersects the above masks.
+ */
+ /*@{*/
+ void (*choose_point)( struct gl_context * );
+ void (*choose_line)( struct gl_context * );
+ void (*choose_triangle)( struct gl_context * );
+ /*@}*/
+
+ /**
+ * Current point, line and triangle drawing functions.
+ */
+ /*@{*/
+ swrast_point_func Point;
+ swrast_line_func Line;
+ swrast_tri_func Triangle;
+ /*@}*/
+
+ /**
+ * Placeholders for when separate specular (or secondary color) is
+ * enabled but texturing is not.
+ */
+ /*@{*/
+ swrast_point_func SpecPoint;
+ swrast_line_func SpecLine;
+ swrast_tri_func SpecTriangle;
+ /*@}*/
+
+ /**
+ * Typically, we'll allocate a sw_span structure as a local variable
+ * and set its 'array' pointer to point to this object. The reason is
+ * this object is big and causes problems when allocated on the stack
+ * on some systems.
+ */
+ SWspanarrays *SpanArrays;
+ SWspanarrays *ZoomedArrays; /**< For pixel zooming */
+
+ /**
+ * Used to buffer N GL_POINTS, instead of rendering one by one.
+ */
+ SWspan PointSpan;
+
+ /** Internal hooks, kept up to date by the same mechanism as above.
+ */
+ blend_func BlendFunc;
+ texture_sample_func TextureSample[MAX_TEXTURE_IMAGE_UNITS];
+
+ /** Buffer for saving the sampled texture colors.
+ * Needed for GL_ARB_texture_env_crossbar implementation.
+ */
+ GLfloat *TexelBuffer;
+
+ validate_texture_image_func ValidateTextureImage;
+
+ /** State used during execution of fragment programs */
+ struct gl_program_machine FragProgMachine;
+
+} SWcontext;
+
+
+extern void
+_swrast_validate_derived( struct gl_context *ctx );
+
+extern void
+_swrast_update_texture_samplers(struct gl_context *ctx);
+
+
+/** Return SWcontext for the given struct gl_context */
+static INLINE SWcontext *
+SWRAST_CONTEXT(struct gl_context *ctx)
+{
+ return (SWcontext *) ctx->swrast_context;
+}
+
+/** const version of above */
+static INLINE const SWcontext *
+CONST_SWRAST_CONTEXT(const struct gl_context *ctx)
+{
+ return (const SWcontext *) ctx->swrast_context;
+}
+
+
+/**
+ * Called prior to framebuffer reading/writing.
+ * For drivers that rely on swrast for fallback rendering, this is the
+ * driver's opportunity to map renderbuffers and textures.
+ */
+static INLINE void
+swrast_render_start(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Driver.SpanRenderStart)
+ swrast->Driver.SpanRenderStart(ctx);
+}
+
+
+/** Called after framebuffer reading/writing */
+static INLINE void
+swrast_render_finish(struct gl_context *ctx)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ if (swrast->Driver.SpanRenderFinish)
+ swrast->Driver.SpanRenderFinish(ctx);
+}
+
+
+
+/**
+ * Size of an RGBA pixel, in bytes, for given datatype.
+ */
+#define RGBA_PIXEL_SIZE(TYPE) \
+ ((TYPE == GL_UNSIGNED_BYTE) ? 4 * sizeof(GLubyte) : \
+ ((TYPE == GL_UNSIGNED_SHORT) ? 4 * sizeof(GLushort) \
+ : 4 * sizeof(GLfloat)))
+
+
+
+/*
+ * Fixed point arithmetic macros
+ */
+#ifndef FIXED_FRAC_BITS
+#define FIXED_FRAC_BITS 11
+#endif
+
+#define FIXED_SHIFT FIXED_FRAC_BITS
+#define FIXED_ONE (1 << FIXED_SHIFT)
+#define FIXED_HALF (1 << (FIXED_SHIFT-1))
+#define FIXED_FRAC_MASK (FIXED_ONE - 1)
+#define FIXED_INT_MASK (~FIXED_FRAC_MASK)
+#define FIXED_EPSILON 1
+#define FIXED_SCALE ((float) FIXED_ONE)
+#define FIXED_DBL_SCALE ((double) FIXED_ONE)
+#define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
+#define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
+#define IntToFixed(I) ((I) << FIXED_SHIFT)
+#define FixedToInt(X) ((X) >> FIXED_SHIFT)
+#define FixedToUns(X) (((unsigned int)(X)) >> FIXED_SHIFT)
+#define FixedCeil(X) (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
+#define FixedFloor(X) ((X) & FIXED_INT_MASK)
+#define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
+#define PosFloatToFixed(X) FloatToFixed(X)
+#define SignedFloatToFixed(X) FloatToFixed(X)
+
+
+
+/*
+ * XXX these macros are just bandages for now in order to make
+ * CHAN_BITS==32 compile cleanly.
+ * These should probably go elsewhere at some point.
+ */
+#if CHAN_TYPE == GL_FLOAT
+#define ChanToFixed(X) (X)
+#define FixedToChan(X) (X)
+#else
+#define ChanToFixed(X) IntToFixed(X)
+#define FixedToChan(X) FixedToInt(X)
+#endif
+
+
+/**
+ * For looping over fragment attributes in the pointe, line
+ * triangle rasterizers.
+ */
+#define ATTRIB_LOOP_BEGIN \
+ { \
+ GLuint a; \
+ for (a = 0; a < swrast->_NumActiveAttribs; a++) { \
+ const GLuint attr = swrast->_ActiveAttribs[a];
+
+#define ATTRIB_LOOP_END } }
+
+
+
+#endif
diff --git a/mesalib/src/mesa/swrast/s_drawpix.c b/mesalib/src/mesa/swrast/s_drawpix.c
index 5109eb0d3..63bfa79b5 100644
--- a/mesalib/src/mesa/swrast/s_drawpix.c
+++ b/mesalib/src/mesa/swrast/s_drawpix.c
@@ -1,753 +1,753 @@
-/*
- * Mesa 3-D graphics library
- * Version: 7.1
- *
- * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-#include "main/glheader.h"
-#include "main/bufferobj.h"
-#include "main/condrender.h"
-#include "main/context.h"
-#include "main/image.h"
-#include "main/imports.h"
-#include "main/macros.h"
-#include "main/pack.h"
-#include "main/pbo.h"
-#include "main/pixeltransfer.h"
-#include "main/state.h"
-
-#include "s_context.h"
-#include "s_span.h"
-#include "s_stencil.h"
-#include "s_zoom.h"
-
-
-
-/**
- * Try to do a fast and simple RGB(a) glDrawPixels.
- * Return: GL_TRUE if success, GL_FALSE if slow path must be used instead
- */
-static GLboolean
-fast_draw_rgba_pixels(struct gl_context *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- const struct gl_pixelstore_attrib *userUnpack,
- const GLvoid *pixels)
-{
- const GLint imgX = x, imgY = y;
- struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
- GLenum rbType;
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- SWspan span;
- GLboolean simpleZoom;
- GLint yStep; /* +1 or -1 */
- struct gl_pixelstore_attrib unpack;
- GLint destX, destY, drawWidth, drawHeight; /* post clipping */
-
- if (!rb)
- return GL_TRUE; /* no-op */
-
- rbType = rb->DataType;
-
- if ((swrast->_RasterMask & ~CLIP_BIT) ||
- ctx->Texture._EnabledCoordUnits ||
- userUnpack->SwapBytes ||
- ctx->_ImageTransferState) {
- /* can't handle any of those conditions */
- return GL_FALSE;
- }
-
- INIT_SPAN(span, GL_BITMAP);
- span.arrayMask = SPAN_RGBA;
- span.arrayAttribs = FRAG_BIT_COL0;
- _swrast_span_default_attribs(ctx, &span);
-
- /* copy input params since clipping may change them */
- unpack = *userUnpack;
- destX = x;
- destY = y;
- drawWidth = width;
- drawHeight = height;
-
- /* check for simple zooming and clipping */
- if (ctx->Pixel.ZoomX == 1.0F &&
- (ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F)) {
- if (!_mesa_clip_drawpixels(ctx, &destX, &destY,
- &drawWidth, &drawHeight, &unpack)) {
- /* image was completely clipped: no-op, all done */
- return GL_TRUE;
- }
- simpleZoom = GL_TRUE;
- yStep = (GLint) ctx->Pixel.ZoomY;
- ASSERT(yStep == 1 || yStep == -1);
- }
- else {
- /* non-simple zooming */
- simpleZoom = GL_FALSE;
- yStep = 1;
- if (unpack.RowLength == 0)
- unpack.RowLength = width;
- }
-
- /*
- * Ready to draw!
- */
-
- if (format == GL_RGBA && type == rbType) {
- const GLubyte *src
- = (const GLubyte *) _mesa_image_address2d(&unpack, pixels, width,
- height, format, type, 0, 0);
- const GLint srcStride = _mesa_image_row_stride(&unpack, width,
- format, type);
- if (simpleZoom) {
- GLint row;
- for (row = 0; row < drawHeight; row++) {
- rb->PutRow(ctx, rb, drawWidth, destX, destY, src, NULL);
- src += srcStride;
- destY += yStep;
- }
- }
- else {
- /* with zooming */
- GLint row;
- for (row = 0; row < drawHeight; row++) {
- span.x = destX;
- span.y = destY + row;
- span.end = drawWidth;
- span.array->ChanType = rbType;
- _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, src);
- src += srcStride;
- }
- span.array->ChanType = CHAN_TYPE;
- }
- return GL_TRUE;
- }
-
- if (format == GL_RGB && type == rbType) {
- const GLubyte *src
- = (const GLubyte *) _mesa_image_address2d(&unpack, pixels, width,
- height, format, type, 0, 0);
- const GLint srcStride = _mesa_image_row_stride(&unpack, width,
- format, type);
- if (simpleZoom) {
- GLint row;
- for (row = 0; row < drawHeight; row++) {
- rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, src, NULL);
- src += srcStride;
- destY += yStep;
- }
- }
- else {
- /* with zooming */
- GLint row;
- for (row = 0; row < drawHeight; row++) {
- span.x = destX;
- span.y = destY;
- span.end = drawWidth;
- span.array->ChanType = rbType;
- _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span, src);
- src += srcStride;
- destY++;
- }
- span.array->ChanType = CHAN_TYPE;
- }
- return GL_TRUE;
- }
-
- /* Remaining cases haven't been tested with alignment != 1 */
- if (userUnpack->Alignment != 1)
- return GL_FALSE;
-
- if (format == GL_LUMINANCE && type == CHAN_TYPE && rbType == CHAN_TYPE) {
- const GLchan *src = (const GLchan *) pixels
- + (unpack.SkipRows * unpack.RowLength + unpack.SkipPixels);
- if (simpleZoom) {
- /* no zooming */
- GLint row;
- ASSERT(drawWidth <= MAX_WIDTH);
- for (row = 0; row < drawHeight; row++) {
- GLchan rgb[MAX_WIDTH][3];
- GLint i;
- for (i = 0;i<drawWidth;i++) {
- rgb[i][0] = src[i];
- rgb[i][1] = src[i];
- rgb[i][2] = src[i];
- }
- rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, rgb, NULL);
- src += unpack.RowLength;
- destY += yStep;
- }
- }
- else {
- /* with zooming */
- GLint row;
- ASSERT(drawWidth <= MAX_WIDTH);
- for (row = 0; row < drawHeight; row++) {
- GLchan rgb[MAX_WIDTH][3];
- GLint i;
- for (i = 0;i<drawWidth;i++) {
- rgb[i][0] = src[i];
- rgb[i][1] = src[i];
- rgb[i][2] = src[i];
- }
- span.x = destX;
- span.y = destY;
- span.end = drawWidth;
- _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span, rgb);
- src += unpack.RowLength;
- destY++;
- }
- }
- return GL_TRUE;
- }
-
- if (format == GL_LUMINANCE_ALPHA && type == CHAN_TYPE && rbType == CHAN_TYPE) {
- const GLchan *src = (const GLchan *) pixels
- + (unpack.SkipRows * unpack.RowLength + unpack.SkipPixels)*2;
- if (simpleZoom) {
- GLint row;
- ASSERT(drawWidth <= MAX_WIDTH);
- for (row = 0; row < drawHeight; row++) {
- GLint i;
- const GLchan *ptr = src;
- for (i = 0;i<drawWidth;i++) {
- span.array->rgba[i][0] = *ptr;
- span.array->rgba[i][1] = *ptr;
- span.array->rgba[i][2] = *ptr++;
- span.array->rgba[i][3] = *ptr++;
- }
- rb->PutRow(ctx, rb, drawWidth, destX, destY,
- span.array->rgba, NULL);
- src += unpack.RowLength*2;
- destY += yStep;
- }
- }
- else {
- /* with zooming */
- GLint row;
- ASSERT(drawWidth <= MAX_WIDTH);
- for (row = 0; row < drawHeight; row++) {
- const GLchan *ptr = src;
- GLint i;
- for (i = 0;i<drawWidth;i++) {
- span.array->rgba[i][0] = *ptr;
- span.array->rgba[i][1] = *ptr;
- span.array->rgba[i][2] = *ptr++;
- span.array->rgba[i][3] = *ptr++;
- }
- span.x = destX;
- span.y = destY;
- span.end = drawWidth;
- _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span,
- span.array->rgba);
- src += unpack.RowLength*2;
- destY++;
- }
- }
- return GL_TRUE;
- }
-
- if (format == GL_COLOR_INDEX && type == GL_UNSIGNED_BYTE) {
- const GLubyte *src = (const GLubyte *) pixels
- + unpack.SkipRows * unpack.RowLength + unpack.SkipPixels;
- if (rbType == GL_UNSIGNED_BYTE) {
- /* convert ubyte/CI data to ubyte/RGBA */
- if (simpleZoom) {
- GLint row;
- for (row = 0; row < drawHeight; row++) {
- ASSERT(drawWidth <= MAX_WIDTH);
- _mesa_map_ci8_to_rgba8(ctx, drawWidth, src,
- span.array->rgba8);
- rb->PutRow(ctx, rb, drawWidth, destX, destY,
- span.array->rgba8, NULL);
- src += unpack.RowLength;
- destY += yStep;
- }
- }
- else {
- /* ubyte/CI to ubyte/RGBA with zooming */
- GLint row;
- for (row = 0; row < drawHeight; row++) {
- ASSERT(drawWidth <= MAX_WIDTH);
- _mesa_map_ci8_to_rgba8(ctx, drawWidth, src,
- span.array->rgba8);
- span.x = destX;
- span.y = destY;
- span.end = drawWidth;
- _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span,
- span.array->rgba8);
- src += unpack.RowLength;
- destY++;
- }
- }
- return GL_TRUE;
- }
- }
-
- /* can't handle this pixel format and/or data type */
- return GL_FALSE;
-}
-
-
-
-/*
- * Draw stencil image.
- */
-static void
-draw_stencil_pixels( struct gl_context *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum type,
- const struct gl_pixelstore_attrib *unpack,
- const GLvoid *pixels )
-{
- const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
- GLint skipPixels;
-
- /* if width > MAX_WIDTH, have to process image in chunks */
- skipPixels = 0;
- while (skipPixels < width) {
- const GLint spanX = x + skipPixels;
- const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
- GLint row;
- for (row = 0; row < height; row++) {
- const GLint spanY = y + row;
- GLstencil values[MAX_WIDTH];
- GLenum destType = (sizeof(GLstencil) == sizeof(GLubyte))
- ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT;
- const GLvoid *source = _mesa_image_address2d(unpack, pixels,
- width, height,
- GL_STENCIL_INDEX, type,
- row, skipPixels);
- _mesa_unpack_stencil_span(ctx, spanWidth, destType, values,
- type, source, unpack,
- ctx->_ImageTransferState);
- if (zoom) {
- _swrast_write_zoomed_stencil_span(ctx, x, y, spanWidth,
- spanX, spanY, values);
- }
- else {
- _swrast_write_stencil_span(ctx, spanWidth, spanX, spanY, values);
- }
- }
- skipPixels += spanWidth;
- }
-}
-
-
-/*
- * Draw depth image.
- */
-static void
-draw_depth_pixels( struct gl_context *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum type,
- const struct gl_pixelstore_attrib *unpack,
- const GLvoid *pixels )
-{
- const GLboolean scaleOrBias
- = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
- const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
- SWspan span;
-
- INIT_SPAN(span, GL_BITMAP);
- span.arrayMask = SPAN_Z;
- _swrast_span_default_attribs(ctx, &span);
-
- if (type == GL_UNSIGNED_SHORT
- && ctx->DrawBuffer->Visual.depthBits == 16
- && !scaleOrBias
- && !zoom
- && width <= MAX_WIDTH
- && !unpack->SwapBytes) {
- /* Special case: directly write 16-bit depth values */
- GLint row;
- for (row = 0; row < height; row++) {
- const GLushort *zSrc = (const GLushort *)
- _mesa_image_address2d(unpack, pixels, width, height,
- GL_DEPTH_COMPONENT, type, row, 0);
- GLint i;
- for (i = 0; i < width; i++)
- span.array->z[i] = zSrc[i];
- span.x = x;
- span.y = y + row;
- span.end = width;
- _swrast_write_rgba_span(ctx, &span);
- }
- }
- else if (type == GL_UNSIGNED_INT
- && !scaleOrBias
- && !zoom
- && width <= MAX_WIDTH
- && !unpack->SwapBytes) {
- /* Special case: shift 32-bit values down to Visual.depthBits */
- const GLint shift = 32 - ctx->DrawBuffer->Visual.depthBits;
- GLint row;
- for (row = 0; row < height; row++) {
- const GLuint *zSrc = (const GLuint *)
- _mesa_image_address2d(unpack, pixels, width, height,
- GL_DEPTH_COMPONENT, type, row, 0);
- if (shift == 0) {
- memcpy(span.array->z, zSrc, width * sizeof(GLuint));
- }
- else {
- GLint col;
- for (col = 0; col < width; col++)
- span.array->z[col] = zSrc[col] >> shift;
- }
- span.x = x;
- span.y = y + row;
- span.end = width;
- _swrast_write_rgba_span(ctx, &span);
- }
- }
- else {
- /* General case */
- const GLuint depthMax = ctx->DrawBuffer->_DepthMax;
- GLint skipPixels = 0;
-
- /* in case width > MAX_WIDTH do the copy in chunks */
- while (skipPixels < width) {
- const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
- GLint row;
- ASSERT(span.end <= MAX_WIDTH);
- for (row = 0; row < height; row++) {
- const GLvoid *zSrc = _mesa_image_address2d(unpack,
- pixels, width, height,
- GL_DEPTH_COMPONENT, type,
- row, skipPixels);
-
- /* Set these for each row since the _swrast_write_* function may
- * change them while clipping.
- */
- span.x = x + skipPixels;
- span.y = y + row;
- span.end = spanWidth;
-
- _mesa_unpack_depth_span(ctx, spanWidth,
- GL_UNSIGNED_INT, span.array->z, depthMax,
- type, zSrc, unpack);
- if (zoom) {
- _swrast_write_zoomed_depth_span(ctx, x, y, &span);
- }
- else {
- _swrast_write_rgba_span(ctx, &span);
- }
- }
- skipPixels += spanWidth;
- }
- }
-}
-
-
-
-/**
- * Draw RGBA image.
- */
-static void
-draw_rgba_pixels( struct gl_context *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- const struct gl_pixelstore_attrib *unpack,
- const GLvoid *pixels )
-{
- const GLint imgX = x, imgY = y;
- const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
- GLfloat *convImage = NULL;
- GLbitfield transferOps = ctx->_ImageTransferState;
- SWspan span;
-
- /* Try an optimized glDrawPixels first */
- if (fast_draw_rgba_pixels(ctx, x, y, width, height, format, type,
- unpack, pixels)) {
- return;
- }
-
- INIT_SPAN(span, GL_BITMAP);
- _swrast_span_default_attribs(ctx, &span);
- span.arrayMask = SPAN_RGBA;
- span.arrayAttribs = FRAG_BIT_COL0; /* we're fill in COL0 attrib values */
-
- if (ctx->DrawBuffer->_NumColorDrawBuffers > 0 &&
- ctx->DrawBuffer->_ColorDrawBuffers[0]->DataType != GL_FLOAT &&
- ctx->Color.ClampFragmentColor != GL_FALSE) {
- /* need to clamp colors before applying fragment ops */
- transferOps |= IMAGE_CLAMP_BIT;
- }
-
- /*
- * General solution
- */
- {
- const GLbitfield interpMask = span.interpMask;
- const GLbitfield arrayMask = span.arrayMask;
- const GLint srcStride
- = _mesa_image_row_stride(unpack, width, format, type);
- GLint skipPixels = 0;
- /* use span array for temp color storage */
- GLfloat *rgba = (GLfloat *) span.array->attribs[FRAG_ATTRIB_COL0];
-
- /* if the span is wider than MAX_WIDTH we have to do it in chunks */
- while (skipPixels < width) {
- const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
- const GLubyte *source
- = (const GLubyte *) _mesa_image_address2d(unpack, pixels,
- width, height, format,
- type, 0, skipPixels);
- GLint row;
-
- for (row = 0; row < height; row++) {
- /* get image row as float/RGBA */
- _mesa_unpack_color_span_float(ctx, spanWidth, GL_RGBA, rgba,
- format, type, source, unpack,
- transferOps);
- /* Set these for each row since the _swrast_write_* functions
- * may change them while clipping/rendering.
- */
- span.array->ChanType = GL_FLOAT;
- span.x = x + skipPixels;
- span.y = y + row;
- span.end = spanWidth;
- span.arrayMask = arrayMask;
- span.interpMask = interpMask;
- if (zoom) {
- _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, rgba);
- }
- else {
- _swrast_write_rgba_span(ctx, &span);
- }
-
- source += srcStride;
- } /* for row */
-
- skipPixels += spanWidth;
- } /* while skipPixels < width */
-
- /* XXX this is ugly/temporary, to undo above change */
- span.array->ChanType = CHAN_TYPE;
- }
-
- if (convImage) {
- free(convImage);
- }
-}
-
-
-/**
- * This is a bit different from drawing GL_DEPTH_COMPONENT pixels.
- * The only per-pixel operations that apply are depth scale/bias,
- * stencil offset/shift, GL_DEPTH_WRITEMASK and GL_STENCIL_WRITEMASK,
- * and pixel zoom.
- * Also, only the depth buffer and stencil buffers are touched, not the
- * color buffer(s).
- */
-static void
-draw_depth_stencil_pixels(struct gl_context *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height, GLenum type,
- const struct gl_pixelstore_attrib *unpack,
- const GLvoid *pixels)
-{
- const GLint imgX = x, imgY = y;
- const GLboolean scaleOrBias
- = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
- const GLuint depthMax = ctx->DrawBuffer->_DepthMax;
- const GLuint stencilMask = ctx->Stencil.WriteMask[0];
- const GLuint stencilType = (STENCIL_BITS == 8) ?
- GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT;
- const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
- struct gl_renderbuffer *depthRb, *stencilRb;
- struct gl_pixelstore_attrib clippedUnpack = *unpack;
-
- if (!zoom) {
- if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height,
- &clippedUnpack)) {
- /* totally clipped */
- return;
- }
- }
-
- depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
- stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
- ASSERT(depthRb);
- ASSERT(stencilRb);
-
- if (depthRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
- stencilRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
- depthRb == stencilRb &&
- !scaleOrBias &&
- !zoom &&
- ctx->Depth.Mask &&
- (stencilMask & 0xff) == 0xff) {
- /* This is the ideal case.
- * Drawing GL_DEPTH_STENCIL pixels into a combined depth/stencil buffer.
- * Plus, no pixel transfer ops, zooming, or masking needed.
- */
- GLint i;
- for (i = 0; i < height; i++) {
- const GLuint *src = (const GLuint *)
- _mesa_image_address2d(&clippedUnpack, pixels, width, height,
- GL_DEPTH_STENCIL_EXT, type, i, 0);
- depthRb->PutRow(ctx, depthRb, width, x, y + i, src, NULL);
- }
- }
- else {
- /* sub-optimal cases:
- * Separate depth/stencil buffers, or pixel transfer ops required.
- */
- /* XXX need to handle very wide images (skippixels) */
- GLint i;
-
- depthRb = ctx->DrawBuffer->_DepthBuffer;
- stencilRb = ctx->DrawBuffer->_StencilBuffer;
-
- for (i = 0; i < height; i++) {
- const GLuint *depthStencilSrc = (const GLuint *)
- _mesa_image_address2d(&clippedUnpack, pixels, width, height,
- GL_DEPTH_STENCIL_EXT, type, i, 0);
-
- if (ctx->Depth.Mask) {
- if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 24) {
- /* fast path 24-bit zbuffer */
- GLuint zValues[MAX_WIDTH];
- GLint j;
- ASSERT(depthRb->DataType == GL_UNSIGNED_INT);
- for (j = 0; j < width; j++) {
- zValues[j] = depthStencilSrc[j] >> 8;
- }
- if (zoom)
- _swrast_write_zoomed_z_span(ctx, imgX, imgY, width,
- x, y + i, zValues);
- else
- depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
- }
- else if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 16) {
- /* fast path 16-bit zbuffer */
- GLushort zValues[MAX_WIDTH];
- GLint j;
- ASSERT(depthRb->DataType == GL_UNSIGNED_SHORT);
- for (j = 0; j < width; j++) {
- zValues[j] = depthStencilSrc[j] >> 16;
- }
- if (zoom)
- _swrast_write_zoomed_z_span(ctx, imgX, imgY, width,
- x, y + i, zValues);
- else
- depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
- }
- else {
- /* general case */
- GLuint zValues[MAX_WIDTH]; /* 16 or 32-bit Z value storage */
- _mesa_unpack_depth_span(ctx, width,
- depthRb->DataType, zValues, depthMax,
- type, depthStencilSrc, &clippedUnpack);
- if (zoom) {
- _swrast_write_zoomed_z_span(ctx, imgX, imgY, width, x,
- y + i, zValues);
- }
- else {
- depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
- }
- }
- }
-
- if (stencilMask != 0x0) {
- GLstencil stencilValues[MAX_WIDTH];
- /* get stencil values, with shift/offset/mapping */
- _mesa_unpack_stencil_span(ctx, width, stencilType, stencilValues,
- type, depthStencilSrc, &clippedUnpack,
- ctx->_ImageTransferState);
- if (zoom)
- _swrast_write_zoomed_stencil_span(ctx, imgX, imgY, width,
- x, y + i, stencilValues);
- else
- _swrast_write_stencil_span(ctx, width, x, y + i, stencilValues);
- }
- }
- }
-}
-
-
-/**
- * Execute software-based glDrawPixels.
- * By time we get here, all error checking will have been done.
- */
-void
-_swrast_DrawPixels( struct gl_context *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- const struct gl_pixelstore_attrib *unpack,
- const GLvoid *pixels )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLboolean save_vp_override = ctx->VertexProgram._Overriden;
-
- if (!_mesa_check_conditional_render(ctx))
- return; /* don't draw */
-
- /* We are creating fragments directly, without going through vertex
- * programs.
- *
- * This override flag tells the fragment processing code that its input
- * comes from a non-standard source, and it may therefore not rely on
- * optimizations that assume e.g. constant color if there is no color
- * vertex array.
- */
- _mesa_set_vp_override(ctx, GL_TRUE);
-
- swrast_render_start(ctx);
-
- if (ctx->NewState)
- _mesa_update_state(ctx);
-
- if (swrast->NewState)
- _swrast_validate_derived( ctx );
-
- pixels = _mesa_map_pbo_source(ctx, unpack, pixels);
- if (!pixels) {
- swrast_render_finish(ctx);
- _mesa_set_vp_override(ctx, save_vp_override);
- return;
- }
-
- /*
- * By time we get here, all error checking should have been done.
- */
- switch (format) {
- case GL_STENCIL_INDEX:
- draw_stencil_pixels( ctx, x, y, width, height, type, unpack, pixels );
- break;
- case GL_DEPTH_COMPONENT:
- draw_depth_pixels( ctx, x, y, width, height, type, unpack, pixels );
- break;
- case GL_DEPTH_STENCIL_EXT:
- draw_depth_stencil_pixels(ctx, x, y, width, height, type, unpack, pixels);
- break;
- default:
- /* all other formats should be color formats */
- draw_rgba_pixels(ctx, x, y, width, height, format, type, unpack, pixels);
- }
-
- swrast_render_finish(ctx);
- _mesa_set_vp_override(ctx, save_vp_override);
-
- _mesa_unmap_pbo_source(ctx, unpack);
-}
+/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/bufferobj.h"
+#include "main/condrender.h"
+#include "main/context.h"
+#include "main/image.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "main/pack.h"
+#include "main/pbo.h"
+#include "main/pixeltransfer.h"
+#include "main/state.h"
+
+#include "s_context.h"
+#include "s_span.h"
+#include "s_stencil.h"
+#include "s_zoom.h"
+
+
+
+/**
+ * Try to do a fast and simple RGB(a) glDrawPixels.
+ * Return: GL_TRUE if success, GL_FALSE if slow path must be used instead
+ */
+static GLboolean
+fast_draw_rgba_pixels(struct gl_context *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *userUnpack,
+ const GLvoid *pixels)
+{
+ const GLint imgX = x, imgY = y;
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
+ GLenum rbType;
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ SWspan span;
+ GLboolean simpleZoom;
+ GLint yStep; /* +1 or -1 */
+ struct gl_pixelstore_attrib unpack;
+ GLint destX, destY, drawWidth, drawHeight; /* post clipping */
+
+ if (!rb)
+ return GL_TRUE; /* no-op */
+
+ rbType = rb->DataType;
+
+ if ((swrast->_RasterMask & ~CLIP_BIT) ||
+ ctx->Texture._EnabledCoordUnits ||
+ userUnpack->SwapBytes ||
+ ctx->_ImageTransferState) {
+ /* can't handle any of those conditions */
+ return GL_FALSE;
+ }
+
+ INIT_SPAN(span, GL_BITMAP);
+ span.arrayMask = SPAN_RGBA;
+ span.arrayAttribs = FRAG_BIT_COL0;
+ _swrast_span_default_attribs(ctx, &span);
+
+ /* copy input params since clipping may change them */
+ unpack = *userUnpack;
+ destX = x;
+ destY = y;
+ drawWidth = width;
+ drawHeight = height;
+
+ /* check for simple zooming and clipping */
+ if (ctx->Pixel.ZoomX == 1.0F &&
+ (ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F)) {
+ if (!_mesa_clip_drawpixels(ctx, &destX, &destY,
+ &drawWidth, &drawHeight, &unpack)) {
+ /* image was completely clipped: no-op, all done */
+ return GL_TRUE;
+ }
+ simpleZoom = GL_TRUE;
+ yStep = (GLint) ctx->Pixel.ZoomY;
+ ASSERT(yStep == 1 || yStep == -1);
+ }
+ else {
+ /* non-simple zooming */
+ simpleZoom = GL_FALSE;
+ yStep = 1;
+ if (unpack.RowLength == 0)
+ unpack.RowLength = width;
+ }
+
+ /*
+ * Ready to draw!
+ */
+
+ if (format == GL_RGBA && type == rbType) {
+ const GLubyte *src
+ = (const GLubyte *) _mesa_image_address2d(&unpack, pixels, width,
+ height, format, type, 0, 0);
+ const GLint srcStride = _mesa_image_row_stride(&unpack, width,
+ format, type);
+ if (simpleZoom) {
+ GLint row;
+ for (row = 0; row < drawHeight; row++) {
+ rb->PutRow(ctx, rb, drawWidth, destX, destY, src, NULL);
+ src += srcStride;
+ destY += yStep;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ for (row = 0; row < drawHeight; row++) {
+ span.x = destX;
+ span.y = destY + row;
+ span.end = drawWidth;
+ span.array->ChanType = rbType;
+ _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, src);
+ src += srcStride;
+ }
+ span.array->ChanType = CHAN_TYPE;
+ }
+ return GL_TRUE;
+ }
+
+ if (format == GL_RGB && type == rbType) {
+ const GLubyte *src
+ = (const GLubyte *) _mesa_image_address2d(&unpack, pixels, width,
+ height, format, type, 0, 0);
+ const GLint srcStride = _mesa_image_row_stride(&unpack, width,
+ format, type);
+ if (simpleZoom) {
+ GLint row;
+ for (row = 0; row < drawHeight; row++) {
+ rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, src, NULL);
+ src += srcStride;
+ destY += yStep;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ for (row = 0; row < drawHeight; row++) {
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ span.array->ChanType = rbType;
+ _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span, src);
+ src += srcStride;
+ destY++;
+ }
+ span.array->ChanType = CHAN_TYPE;
+ }
+ return GL_TRUE;
+ }
+
+ /* Remaining cases haven't been tested with alignment != 1 */
+ if (userUnpack->Alignment != 1)
+ return GL_FALSE;
+
+ if (format == GL_LUMINANCE && type == CHAN_TYPE && rbType == CHAN_TYPE) {
+ const GLchan *src = (const GLchan *) pixels
+ + (unpack.SkipRows * unpack.RowLength + unpack.SkipPixels);
+ if (simpleZoom) {
+ /* no zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row = 0; row < drawHeight; row++) {
+ GLchan rgb[MAX_WIDTH][3];
+ GLint i;
+ for (i = 0;i<drawWidth;i++) {
+ rgb[i][0] = src[i];
+ rgb[i][1] = src[i];
+ rgb[i][2] = src[i];
+ }
+ rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, rgb, NULL);
+ src += unpack.RowLength;
+ destY += yStep;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row = 0; row < drawHeight; row++) {
+ GLchan rgb[MAX_WIDTH][3];
+ GLint i;
+ for (i = 0;i<drawWidth;i++) {
+ rgb[i][0] = src[i];
+ rgb[i][1] = src[i];
+ rgb[i][2] = src[i];
+ }
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span, rgb);
+ src += unpack.RowLength;
+ destY++;
+ }
+ }
+ return GL_TRUE;
+ }
+
+ if (format == GL_LUMINANCE_ALPHA && type == CHAN_TYPE && rbType == CHAN_TYPE) {
+ const GLchan *src = (const GLchan *) pixels
+ + (unpack.SkipRows * unpack.RowLength + unpack.SkipPixels)*2;
+ if (simpleZoom) {
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row = 0; row < drawHeight; row++) {
+ GLint i;
+ const GLchan *ptr = src;
+ for (i = 0;i<drawWidth;i++) {
+ span.array->rgba[i][0] = *ptr;
+ span.array->rgba[i][1] = *ptr;
+ span.array->rgba[i][2] = *ptr++;
+ span.array->rgba[i][3] = *ptr++;
+ }
+ rb->PutRow(ctx, rb, drawWidth, destX, destY,
+ span.array->rgba, NULL);
+ src += unpack.RowLength*2;
+ destY += yStep;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row = 0; row < drawHeight; row++) {
+ const GLchan *ptr = src;
+ GLint i;
+ for (i = 0;i<drawWidth;i++) {
+ span.array->rgba[i][0] = *ptr;
+ span.array->rgba[i][1] = *ptr;
+ span.array->rgba[i][2] = *ptr++;
+ span.array->rgba[i][3] = *ptr++;
+ }
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span,
+ span.array->rgba);
+ src += unpack.RowLength*2;
+ destY++;
+ }
+ }
+ return GL_TRUE;
+ }
+
+ if (format == GL_COLOR_INDEX && type == GL_UNSIGNED_BYTE) {
+ const GLubyte *src = (const GLubyte *) pixels
+ + unpack.SkipRows * unpack.RowLength + unpack.SkipPixels;
+ if (rbType == GL_UNSIGNED_BYTE) {
+ /* convert ubyte/CI data to ubyte/RGBA */
+ if (simpleZoom) {
+ GLint row;
+ for (row = 0; row < drawHeight; row++) {
+ ASSERT(drawWidth <= MAX_WIDTH);
+ _mesa_map_ci8_to_rgba8(ctx, drawWidth, src,
+ span.array->rgba8);
+ rb->PutRow(ctx, rb, drawWidth, destX, destY,
+ span.array->rgba8, NULL);
+ src += unpack.RowLength;
+ destY += yStep;
+ }
+ }
+ else {
+ /* ubyte/CI to ubyte/RGBA with zooming */
+ GLint row;
+ for (row = 0; row < drawHeight; row++) {
+ ASSERT(drawWidth <= MAX_WIDTH);
+ _mesa_map_ci8_to_rgba8(ctx, drawWidth, src,
+ span.array->rgba8);
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span,
+ span.array->rgba8);
+ src += unpack.RowLength;
+ destY++;
+ }
+ }
+ return GL_TRUE;
+ }
+ }
+
+ /* can't handle this pixel format and/or data type */
+ return GL_FALSE;
+}
+
+
+
+/*
+ * Draw stencil image.
+ */
+static void
+draw_stencil_pixels( struct gl_context *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels )
+{
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
+ GLint skipPixels;
+
+ /* if width > MAX_WIDTH, have to process image in chunks */
+ skipPixels = 0;
+ while (skipPixels < width) {
+ const GLint spanX = x + skipPixels;
+ const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
+ GLint row;
+ for (row = 0; row < height; row++) {
+ const GLint spanY = y + row;
+ GLstencil values[MAX_WIDTH];
+ GLenum destType = (sizeof(GLstencil) == sizeof(GLubyte))
+ ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT;
+ const GLvoid *source = _mesa_image_address2d(unpack, pixels,
+ width, height,
+ GL_STENCIL_INDEX, type,
+ row, skipPixels);
+ _mesa_unpack_stencil_span(ctx, spanWidth, destType, values,
+ type, source, unpack,
+ ctx->_ImageTransferState);
+ if (zoom) {
+ _swrast_write_zoomed_stencil_span(ctx, x, y, spanWidth,
+ spanX, spanY, values);
+ }
+ else {
+ _swrast_write_stencil_span(ctx, spanWidth, spanX, spanY, values);
+ }
+ }
+ skipPixels += spanWidth;
+ }
+}
+
+
+/*
+ * Draw depth image.
+ */
+static void
+draw_depth_pixels( struct gl_context *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels )
+{
+ const GLboolean scaleOrBias
+ = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
+ SWspan span;
+
+ INIT_SPAN(span, GL_BITMAP);
+ span.arrayMask = SPAN_Z;
+ _swrast_span_default_attribs(ctx, &span);
+
+ if (type == GL_UNSIGNED_SHORT
+ && ctx->DrawBuffer->Visual.depthBits == 16
+ && !scaleOrBias
+ && !zoom
+ && width <= MAX_WIDTH
+ && !unpack->SwapBytes) {
+ /* Special case: directly write 16-bit depth values */
+ GLint row;
+ for (row = 0; row < height; row++) {
+ const GLushort *zSrc = (const GLushort *)
+ _mesa_image_address2d(unpack, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, row, 0);
+ GLint i;
+ for (i = 0; i < width; i++)
+ span.array->z[i] = zSrc[i];
+ span.x = x;
+ span.y = y + row;
+ span.end = width;
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+ else if (type == GL_UNSIGNED_INT
+ && !scaleOrBias
+ && !zoom
+ && width <= MAX_WIDTH
+ && !unpack->SwapBytes) {
+ /* Special case: shift 32-bit values down to Visual.depthBits */
+ const GLint shift = 32 - ctx->DrawBuffer->Visual.depthBits;
+ GLint row;
+ for (row = 0; row < height; row++) {
+ const GLuint *zSrc = (const GLuint *)
+ _mesa_image_address2d(unpack, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, row, 0);
+ if (shift == 0) {
+ memcpy(span.array->z, zSrc, width * sizeof(GLuint));
+ }
+ else {
+ GLint col;
+ for (col = 0; col < width; col++)
+ span.array->z[col] = zSrc[col] >> shift;
+ }
+ span.x = x;
+ span.y = y + row;
+ span.end = width;
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+ else {
+ /* General case */
+ const GLuint depthMax = ctx->DrawBuffer->_DepthMax;
+ GLint skipPixels = 0;
+
+ /* in case width > MAX_WIDTH do the copy in chunks */
+ while (skipPixels < width) {
+ const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
+ GLint row;
+ ASSERT(span.end <= MAX_WIDTH);
+ for (row = 0; row < height; row++) {
+ const GLvoid *zSrc = _mesa_image_address2d(unpack,
+ pixels, width, height,
+ GL_DEPTH_COMPONENT, type,
+ row, skipPixels);
+
+ /* Set these for each row since the _swrast_write_* function may
+ * change them while clipping.
+ */
+ span.x = x + skipPixels;
+ span.y = y + row;
+ span.end = spanWidth;
+
+ _mesa_unpack_depth_span(ctx, spanWidth,
+ GL_UNSIGNED_INT, span.array->z, depthMax,
+ type, zSrc, unpack);
+ if (zoom) {
+ _swrast_write_zoomed_depth_span(ctx, x, y, &span);
+ }
+ else {
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+ skipPixels += spanWidth;
+ }
+ }
+}
+
+
+
+/**
+ * Draw RGBA image.
+ */
+static void
+draw_rgba_pixels( struct gl_context *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels )
+{
+ const GLint imgX = x, imgY = y;
+ const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
+ GLfloat *convImage = NULL;
+ GLbitfield transferOps = ctx->_ImageTransferState;
+ SWspan span;
+
+ /* Try an optimized glDrawPixels first */
+ if (fast_draw_rgba_pixels(ctx, x, y, width, height, format, type,
+ unpack, pixels)) {
+ return;
+ }
+
+ INIT_SPAN(span, GL_BITMAP);
+ _swrast_span_default_attribs(ctx, &span);
+ span.arrayMask = SPAN_RGBA;
+ span.arrayAttribs = FRAG_BIT_COL0; /* we're fill in COL0 attrib values */
+
+ if (ctx->DrawBuffer->_NumColorDrawBuffers > 0 &&
+ ctx->DrawBuffer->_ColorDrawBuffers[0]->DataType != GL_FLOAT &&
+ ctx->Color.ClampFragmentColor != GL_FALSE) {
+ /* need to clamp colors before applying fragment ops */
+ transferOps |= IMAGE_CLAMP_BIT;
+ }
+
+ /*
+ * General solution
+ */
+ {
+ const GLbitfield interpMask = span.interpMask;
+ const GLbitfield arrayMask = span.arrayMask;
+ const GLint srcStride
+ = _mesa_image_row_stride(unpack, width, format, type);
+ GLint skipPixels = 0;
+ /* use span array for temp color storage */
+ GLfloat *rgba = (GLfloat *) span.array->attribs[FRAG_ATTRIB_COL0];
+
+ /* if the span is wider than MAX_WIDTH we have to do it in chunks */
+ while (skipPixels < width) {
+ const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
+ const GLubyte *source
+ = (const GLubyte *) _mesa_image_address2d(unpack, pixels,
+ width, height, format,
+ type, 0, skipPixels);
+ GLint row;
+
+ for (row = 0; row < height; row++) {
+ /* get image row as float/RGBA */
+ _mesa_unpack_color_span_float(ctx, spanWidth, GL_RGBA, rgba,
+ format, type, source, unpack,
+ transferOps);
+ /* Set these for each row since the _swrast_write_* functions
+ * may change them while clipping/rendering.
+ */
+ span.array->ChanType = GL_FLOAT;
+ span.x = x + skipPixels;
+ span.y = y + row;
+ span.end = spanWidth;
+ span.arrayMask = arrayMask;
+ span.interpMask = interpMask;
+ if (zoom) {
+ _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, rgba);
+ }
+ else {
+ _swrast_write_rgba_span(ctx, &span);
+ }
+
+ source += srcStride;
+ } /* for row */
+
+ skipPixels += spanWidth;
+ } /* while skipPixels < width */
+
+ /* XXX this is ugly/temporary, to undo above change */
+ span.array->ChanType = CHAN_TYPE;
+ }
+
+ if (convImage) {
+ free(convImage);
+ }
+}
+
+
+/**
+ * This is a bit different from drawing GL_DEPTH_COMPONENT pixels.
+ * The only per-pixel operations that apply are depth scale/bias,
+ * stencil offset/shift, GL_DEPTH_WRITEMASK and GL_STENCIL_WRITEMASK,
+ * and pixel zoom.
+ * Also, only the depth buffer and stencil buffers are touched, not the
+ * color buffer(s).
+ */
+static void
+draw_depth_stencil_pixels(struct gl_context *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height, GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels)
+{
+ const GLint imgX = x, imgY = y;
+ const GLboolean scaleOrBias
+ = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
+ const GLuint depthMax = ctx->DrawBuffer->_DepthMax;
+ const GLuint stencilMask = ctx->Stencil.WriteMask[0];
+ const GLuint stencilType = (STENCIL_BITS == 8) ?
+ GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
+ struct gl_renderbuffer *depthRb, *stencilRb;
+ struct gl_pixelstore_attrib clippedUnpack = *unpack;
+
+ if (!zoom) {
+ if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height,
+ &clippedUnpack)) {
+ /* totally clipped */
+ return;
+ }
+ }
+
+ depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+ stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
+ ASSERT(depthRb);
+ ASSERT(stencilRb);
+
+ if (depthRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
+ stencilRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
+ depthRb == stencilRb &&
+ !scaleOrBias &&
+ !zoom &&
+ ctx->Depth.Mask &&
+ (stencilMask & 0xff) == 0xff) {
+ /* This is the ideal case.
+ * Drawing GL_DEPTH_STENCIL pixels into a combined depth/stencil buffer.
+ * Plus, no pixel transfer ops, zooming, or masking needed.
+ */
+ GLint i;
+ for (i = 0; i < height; i++) {
+ const GLuint *src = (const GLuint *)
+ _mesa_image_address2d(&clippedUnpack, pixels, width, height,
+ GL_DEPTH_STENCIL_EXT, type, i, 0);
+ depthRb->PutRow(ctx, depthRb, width, x, y + i, src, NULL);
+ }
+ }
+ else {
+ /* sub-optimal cases:
+ * Separate depth/stencil buffers, or pixel transfer ops required.
+ */
+ /* XXX need to handle very wide images (skippixels) */
+ GLint i;
+
+ depthRb = ctx->DrawBuffer->_DepthBuffer;
+ stencilRb = ctx->DrawBuffer->_StencilBuffer;
+
+ for (i = 0; i < height; i++) {
+ const GLuint *depthStencilSrc = (const GLuint *)
+ _mesa_image_address2d(&clippedUnpack, pixels, width, height,
+ GL_DEPTH_STENCIL_EXT, type, i, 0);
+
+ if (ctx->Depth.Mask) {
+ if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 24) {
+ /* fast path 24-bit zbuffer */
+ GLuint zValues[MAX_WIDTH];
+ GLint j;
+ ASSERT(depthRb->DataType == GL_UNSIGNED_INT);
+ for (j = 0; j < width; j++) {
+ zValues[j] = depthStencilSrc[j] >> 8;
+ }
+ if (zoom)
+ _swrast_write_zoomed_z_span(ctx, imgX, imgY, width,
+ x, y + i, zValues);
+ else
+ depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
+ }
+ else if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 16) {
+ /* fast path 16-bit zbuffer */
+ GLushort zValues[MAX_WIDTH];
+ GLint j;
+ ASSERT(depthRb->DataType == GL_UNSIGNED_SHORT);
+ for (j = 0; j < width; j++) {
+ zValues[j] = depthStencilSrc[j] >> 16;
+ }
+ if (zoom)
+ _swrast_write_zoomed_z_span(ctx, imgX, imgY, width,
+ x, y + i, zValues);
+ else
+ depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
+ }
+ else {
+ /* general case */
+ GLuint zValues[MAX_WIDTH]; /* 16 or 32-bit Z value storage */
+ _mesa_unpack_depth_span(ctx, width,
+ depthRb->DataType, zValues, depthMax,
+ type, depthStencilSrc, &clippedUnpack);
+ if (zoom) {
+ _swrast_write_zoomed_z_span(ctx, imgX, imgY, width, x,
+ y + i, zValues);
+ }
+ else {
+ depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
+ }
+ }
+ }
+
+ if (stencilMask != 0x0) {
+ GLstencil stencilValues[MAX_WIDTH];
+ /* get stencil values, with shift/offset/mapping */
+ _mesa_unpack_stencil_span(ctx, width, stencilType, stencilValues,
+ type, depthStencilSrc, &clippedUnpack,
+ ctx->_ImageTransferState);
+ if (zoom)
+ _swrast_write_zoomed_stencil_span(ctx, imgX, imgY, width,
+ x, y + i, stencilValues);
+ else
+ _swrast_write_stencil_span(ctx, width, x, y + i, stencilValues);
+ }
+ }
+ }
+}
+
+
+/**
+ * Execute software-based glDrawPixels.
+ * By time we get here, all error checking will have been done.
+ */
+void
+_swrast_DrawPixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLboolean save_vp_override = ctx->VertexProgram._Overriden;
+
+ if (!_mesa_check_conditional_render(ctx))
+ return; /* don't draw */
+
+ /* We are creating fragments directly, without going through vertex
+ * programs.
+ *
+ * This override flag tells the fragment processing code that its input
+ * comes from a non-standard source, and it may therefore not rely on
+ * optimizations that assume e.g. constant color if there is no color
+ * vertex array.
+ */
+ _mesa_set_vp_override(ctx, GL_TRUE);
+
+ swrast_render_start(ctx);
+
+ if (ctx->NewState)
+ _mesa_update_state(ctx);
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ pixels = _mesa_map_pbo_source(ctx, unpack, pixels);
+ if (!pixels) {
+ swrast_render_finish(ctx);
+ _mesa_set_vp_override(ctx, save_vp_override);
+ return;
+ }
+
+ /*
+ * By time we get here, all error checking should have been done.
+ */
+ switch (format) {
+ case GL_STENCIL_INDEX:
+ draw_stencil_pixels( ctx, x, y, width, height, type, unpack, pixels );
+ break;
+ case GL_DEPTH_COMPONENT:
+ draw_depth_pixels( ctx, x, y, width, height, type, unpack, pixels );
+ break;
+ case GL_DEPTH_STENCIL_EXT:
+ draw_depth_stencil_pixels(ctx, x, y, width, height, type, unpack, pixels);
+ break;
+ default:
+ /* all other formats should be color formats */
+ draw_rgba_pixels(ctx, x, y, width, height, format, type, unpack, pixels);
+ }
+
+ swrast_render_finish(ctx);
+ _mesa_set_vp_override(ctx, save_vp_override);
+
+ _mesa_unmap_pbo_source(ctx, unpack);
+}
diff --git a/mesalib/src/mesa/swrast/s_fog.c b/mesalib/src/mesa/swrast/s_fog.c
index 5df071481..ea59de160 100644
--- a/mesalib/src/mesa/swrast/s_fog.c
+++ b/mesalib/src/mesa/swrast/s_fog.c
@@ -1,244 +1,244 @@
-/*
- * Mesa 3-D graphics library
- * Version: 6.5.2
- *
- * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-#include "main/glheader.h"
-#include "main/colormac.h"
-#include "main/macros.h"
-
-#include "s_context.h"
-#include "s_fog.h"
-
-
-/**
- * Used to convert current raster distance to a fog factor in [0,1].
- */
-GLfloat
-_swrast_z_to_fogfactor(struct gl_context *ctx, GLfloat z)
-{
- GLfloat d, f;
-
- switch (ctx->Fog.Mode) {
- case GL_LINEAR:
- if (ctx->Fog.Start == ctx->Fog.End)
- d = 1.0F;
- else
- d = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
- f = (ctx->Fog.End - z) * d;
- return CLAMP(f, 0.0F, 1.0F);
- case GL_EXP:
- d = ctx->Fog.Density;
- f = EXPF(-d * z);
- f = CLAMP(f, 0.0F, 1.0F);
- return f;
- case GL_EXP2:
- d = ctx->Fog.Density;
- f = EXPF(-(d * d * z * z));
- f = CLAMP(f, 0.0F, 1.0F);
- return f;
- default:
- _mesa_problem(ctx, "Bad fog mode in _swrast_z_to_fogfactor");
- return 0.0;
- }
-}
-
-
-#define LINEAR_FOG(f, coord) f = (fogEnd - coord) * fogScale
-
-#define EXP_FOG(f, coord) f = EXPF(density * coord)
-
-#define EXP2_FOG(f, coord) \
-do { \
- GLfloat tmp = negDensitySquared * coord * coord; \
- if (tmp < FLT_MIN_10_EXP) \
- tmp = FLT_MIN_10_EXP; \
- f = EXPF(tmp); \
- } while(0)
-
-
-#define BLEND_FOG(f, coord) f = coord
-
-
-
-/**
- * Template code for computing fog blend factor and applying it to colors.
- * \param TYPE either GLubyte, GLushort or GLfloat.
- * \param COMPUTE_F code to compute the fog blend factor, f.
- */
-#define FOG_LOOP(TYPE, FOG_FUNC) \
-if (span->arrayAttribs & FRAG_BIT_FOGC) { \
- GLuint i; \
- for (i = 0; i < span->end; i++) { \
- const GLfloat fogCoord = span->array->attribs[FRAG_ATTRIB_FOGC][i][0]; \
- const GLfloat c = FABSF(fogCoord); \
- GLfloat f, oneMinusF; \
- FOG_FUNC(f, c); \
- f = CLAMP(f, 0.0F, 1.0F); \
- oneMinusF = 1.0F - f; \
- rgba[i][RCOMP] = (TYPE) (f * rgba[i][RCOMP] + oneMinusF * rFog); \
- rgba[i][GCOMP] = (TYPE) (f * rgba[i][GCOMP] + oneMinusF * gFog); \
- rgba[i][BCOMP] = (TYPE) (f * rgba[i][BCOMP] + oneMinusF * bFog); \
- } \
-} \
-else { \
- const GLfloat fogStep = span->attrStepX[FRAG_ATTRIB_FOGC][0]; \
- GLfloat fogCoord = span->attrStart[FRAG_ATTRIB_FOGC][0]; \
- const GLfloat wStep = span->attrStepX[FRAG_ATTRIB_WPOS][3]; \
- GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3]; \
- GLuint i; \
- for (i = 0; i < span->end; i++) { \
- const GLfloat c = FABSF(fogCoord) / w; \
- GLfloat f, oneMinusF; \
- FOG_FUNC(f, c); \
- f = CLAMP(f, 0.0F, 1.0F); \
- oneMinusF = 1.0F - f; \
- rgba[i][RCOMP] = (TYPE) (f * rgba[i][RCOMP] + oneMinusF * rFog); \
- rgba[i][GCOMP] = (TYPE) (f * rgba[i][GCOMP] + oneMinusF * gFog); \
- rgba[i][BCOMP] = (TYPE) (f * rgba[i][BCOMP] + oneMinusF * bFog); \
- fogCoord += fogStep; \
- w += wStep; \
- } \
-}
-
-/**
- * Apply fog to a span of RGBA pixels.
- * The fog value are either in the span->array->fog array or interpolated from
- * the fog/fogStep values.
- * They fog values are either fog coordinates (Z) or fog blend factors.
- * _PreferPixelFog should be in sync with that state!
- */
-void
-_swrast_fog_rgba_span( const struct gl_context *ctx, SWspan *span )
-{
- const SWcontext *swrast = CONST_SWRAST_CONTEXT(ctx);
- GLfloat rFog, gFog, bFog;
-
- ASSERT(swrast->_FogEnabled);
- ASSERT(span->arrayMask & SPAN_RGBA);
-
- /* compute (scaled) fog color */
- if (span->array->ChanType == GL_UNSIGNED_BYTE) {
- rFog = ctx->Fog.Color[RCOMP] * 255.0F;
- gFog = ctx->Fog.Color[GCOMP] * 255.0F;
- bFog = ctx->Fog.Color[BCOMP] * 255.0F;
- }
- else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
- rFog = ctx->Fog.Color[RCOMP] * 65535.0F;
- gFog = ctx->Fog.Color[GCOMP] * 65535.0F;
- bFog = ctx->Fog.Color[BCOMP] * 65535.0F;
- }
- else {
- rFog = ctx->Fog.Color[RCOMP];
- gFog = ctx->Fog.Color[GCOMP];
- bFog = ctx->Fog.Color[BCOMP];
- }
-
- if (swrast->_PreferPixelFog) {
- /* The span's fog values are fog coordinates, now compute blend factors
- * and blend the fragment colors with the fog color.
- */
- switch (ctx->Fog.Mode) {
- case GL_LINEAR:
- {
- const GLfloat fogEnd = ctx->Fog.End;
- const GLfloat fogScale = (ctx->Fog.Start == ctx->Fog.End)
- ? 1.0F : 1.0F / (ctx->Fog.End - ctx->Fog.Start);
- if (span->array->ChanType == GL_UNSIGNED_BYTE) {
- GLubyte (*rgba)[4] = span->array->rgba8;
- FOG_LOOP(GLubyte, LINEAR_FOG);
- }
- else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
- GLushort (*rgba)[4] = span->array->rgba16;
- FOG_LOOP(GLushort, LINEAR_FOG);
- }
- else {
- GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
- ASSERT(span->array->ChanType == GL_FLOAT);
- FOG_LOOP(GLfloat, LINEAR_FOG);
- }
- }
- break;
-
- case GL_EXP:
- {
- const GLfloat density = -ctx->Fog.Density;
- if (span->array->ChanType == GL_UNSIGNED_BYTE) {
- GLubyte (*rgba)[4] = span->array->rgba8;
- FOG_LOOP(GLubyte, EXP_FOG);
- }
- else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
- GLushort (*rgba)[4] = span->array->rgba16;
- FOG_LOOP(GLushort, EXP_FOG);
- }
- else {
- GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
- ASSERT(span->array->ChanType == GL_FLOAT);
- FOG_LOOP(GLfloat, EXP_FOG);
- }
- }
- break;
-
- case GL_EXP2:
- {
- const GLfloat negDensitySquared = -ctx->Fog.Density * ctx->Fog.Density;
- if (span->array->ChanType == GL_UNSIGNED_BYTE) {
- GLubyte (*rgba)[4] = span->array->rgba8;
- FOG_LOOP(GLubyte, EXP2_FOG);
- }
- else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
- GLushort (*rgba)[4] = span->array->rgba16;
- FOG_LOOP(GLushort, EXP2_FOG);
- }
- else {
- GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
- ASSERT(span->array->ChanType == GL_FLOAT);
- FOG_LOOP(GLfloat, EXP2_FOG);
- }
- }
- break;
-
- default:
- _mesa_problem(ctx, "Bad fog mode in _swrast_fog_rgba_span");
- return;
- }
- }
- else {
- /* The span's fog start/step/array values are blend factors in [0,1].
- * They were previously computed per-vertex.
- */
- if (span->array->ChanType == GL_UNSIGNED_BYTE) {
- GLubyte (*rgba)[4] = span->array->rgba8;
- FOG_LOOP(GLubyte, BLEND_FOG);
- }
- else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
- GLushort (*rgba)[4] = span->array->rgba16;
- FOG_LOOP(GLushort, BLEND_FOG);
- }
- else {
- GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
- ASSERT(span->array->ChanType == GL_FLOAT);
- FOG_LOOP(GLfloat, BLEND_FOG);
- }
- }
-}
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+
+#include "s_context.h"
+#include "s_fog.h"
+
+
+/**
+ * Used to convert current raster distance to a fog factor in [0,1].
+ */
+GLfloat
+_swrast_z_to_fogfactor(struct gl_context *ctx, GLfloat z)
+{
+ GLfloat d, f;
+
+ switch (ctx->Fog.Mode) {
+ case GL_LINEAR:
+ if (ctx->Fog.Start == ctx->Fog.End)
+ d = 1.0F;
+ else
+ d = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
+ f = (ctx->Fog.End - z) * d;
+ return CLAMP(f, 0.0F, 1.0F);
+ case GL_EXP:
+ d = ctx->Fog.Density;
+ f = EXPF(-d * z);
+ f = CLAMP(f, 0.0F, 1.0F);
+ return f;
+ case GL_EXP2:
+ d = ctx->Fog.Density;
+ f = EXPF(-(d * d * z * z));
+ f = CLAMP(f, 0.0F, 1.0F);
+ return f;
+ default:
+ _mesa_problem(ctx, "Bad fog mode in _swrast_z_to_fogfactor");
+ return 0.0;
+ }
+}
+
+
+#define LINEAR_FOG(f, coord) f = (fogEnd - coord) * fogScale
+
+#define EXP_FOG(f, coord) f = EXPF(density * coord)
+
+#define EXP2_FOG(f, coord) \
+do { \
+ GLfloat tmp = negDensitySquared * coord * coord; \
+ if (tmp < FLT_MIN_10_EXP) \
+ tmp = FLT_MIN_10_EXP; \
+ f = EXPF(tmp); \
+ } while(0)
+
+
+#define BLEND_FOG(f, coord) f = coord
+
+
+
+/**
+ * Template code for computing fog blend factor and applying it to colors.
+ * \param TYPE either GLubyte, GLushort or GLfloat.
+ * \param COMPUTE_F code to compute the fog blend factor, f.
+ */
+#define FOG_LOOP(TYPE, FOG_FUNC) \
+if (span->arrayAttribs & FRAG_BIT_FOGC) { \
+ GLuint i; \
+ for (i = 0; i < span->end; i++) { \
+ const GLfloat fogCoord = span->array->attribs[FRAG_ATTRIB_FOGC][i][0]; \
+ const GLfloat c = FABSF(fogCoord); \
+ GLfloat f, oneMinusF; \
+ FOG_FUNC(f, c); \
+ f = CLAMP(f, 0.0F, 1.0F); \
+ oneMinusF = 1.0F - f; \
+ rgba[i][RCOMP] = (TYPE) (f * rgba[i][RCOMP] + oneMinusF * rFog); \
+ rgba[i][GCOMP] = (TYPE) (f * rgba[i][GCOMP] + oneMinusF * gFog); \
+ rgba[i][BCOMP] = (TYPE) (f * rgba[i][BCOMP] + oneMinusF * bFog); \
+ } \
+} \
+else { \
+ const GLfloat fogStep = span->attrStepX[FRAG_ATTRIB_FOGC][0]; \
+ GLfloat fogCoord = span->attrStart[FRAG_ATTRIB_FOGC][0]; \
+ const GLfloat wStep = span->attrStepX[FRAG_ATTRIB_WPOS][3]; \
+ GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3]; \
+ GLuint i; \
+ for (i = 0; i < span->end; i++) { \
+ const GLfloat c = FABSF(fogCoord) / w; \
+ GLfloat f, oneMinusF; \
+ FOG_FUNC(f, c); \
+ f = CLAMP(f, 0.0F, 1.0F); \
+ oneMinusF = 1.0F - f; \
+ rgba[i][RCOMP] = (TYPE) (f * rgba[i][RCOMP] + oneMinusF * rFog); \
+ rgba[i][GCOMP] = (TYPE) (f * rgba[i][GCOMP] + oneMinusF * gFog); \
+ rgba[i][BCOMP] = (TYPE) (f * rgba[i][BCOMP] + oneMinusF * bFog); \
+ fogCoord += fogStep; \
+ w += wStep; \
+ } \
+}
+
+/**
+ * Apply fog to a span of RGBA pixels.
+ * The fog value are either in the span->array->fog array or interpolated from
+ * the fog/fogStep values.
+ * They fog values are either fog coordinates (Z) or fog blend factors.
+ * _PreferPixelFog should be in sync with that state!
+ */
+void
+_swrast_fog_rgba_span( const struct gl_context *ctx, SWspan *span )
+{
+ const SWcontext *swrast = CONST_SWRAST_CONTEXT(ctx);
+ GLfloat rFog, gFog, bFog;
+
+ ASSERT(swrast->_FogEnabled);
+ ASSERT(span->arrayMask & SPAN_RGBA);
+
+ /* compute (scaled) fog color */
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ rFog = ctx->Fog.Color[RCOMP] * 255.0F;
+ gFog = ctx->Fog.Color[GCOMP] * 255.0F;
+ bFog = ctx->Fog.Color[BCOMP] * 255.0F;
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ rFog = ctx->Fog.Color[RCOMP] * 65535.0F;
+ gFog = ctx->Fog.Color[GCOMP] * 65535.0F;
+ bFog = ctx->Fog.Color[BCOMP] * 65535.0F;
+ }
+ else {
+ rFog = ctx->Fog.Color[RCOMP];
+ gFog = ctx->Fog.Color[GCOMP];
+ bFog = ctx->Fog.Color[BCOMP];
+ }
+
+ if (swrast->_PreferPixelFog) {
+ /* The span's fog values are fog coordinates, now compute blend factors
+ * and blend the fragment colors with the fog color.
+ */
+ switch (ctx->Fog.Mode) {
+ case GL_LINEAR:
+ {
+ const GLfloat fogEnd = ctx->Fog.End;
+ const GLfloat fogScale = (ctx->Fog.Start == ctx->Fog.End)
+ ? 1.0F : 1.0F / (ctx->Fog.End - ctx->Fog.Start);
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = span->array->rgba8;
+ FOG_LOOP(GLubyte, LINEAR_FOG);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ FOG_LOOP(GLushort, LINEAR_FOG);
+ }
+ else {
+ GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ ASSERT(span->array->ChanType == GL_FLOAT);
+ FOG_LOOP(GLfloat, LINEAR_FOG);
+ }
+ }
+ break;
+
+ case GL_EXP:
+ {
+ const GLfloat density = -ctx->Fog.Density;
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = span->array->rgba8;
+ FOG_LOOP(GLubyte, EXP_FOG);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ FOG_LOOP(GLushort, EXP_FOG);
+ }
+ else {
+ GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ ASSERT(span->array->ChanType == GL_FLOAT);
+ FOG_LOOP(GLfloat, EXP_FOG);
+ }
+ }
+ break;
+
+ case GL_EXP2:
+ {
+ const GLfloat negDensitySquared = -ctx->Fog.Density * ctx->Fog.Density;
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = span->array->rgba8;
+ FOG_LOOP(GLubyte, EXP2_FOG);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ FOG_LOOP(GLushort, EXP2_FOG);
+ }
+ else {
+ GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ ASSERT(span->array->ChanType == GL_FLOAT);
+ FOG_LOOP(GLfloat, EXP2_FOG);
+ }
+ }
+ break;
+
+ default:
+ _mesa_problem(ctx, "Bad fog mode in _swrast_fog_rgba_span");
+ return;
+ }
+ }
+ else {
+ /* The span's fog start/step/array values are blend factors in [0,1].
+ * They were previously computed per-vertex.
+ */
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte (*rgba)[4] = span->array->rgba8;
+ FOG_LOOP(GLubyte, BLEND_FOG);
+ }
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort (*rgba)[4] = span->array->rgba16;
+ FOG_LOOP(GLushort, BLEND_FOG);
+ }
+ else {
+ GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
+ ASSERT(span->array->ChanType == GL_FLOAT);
+ FOG_LOOP(GLfloat, BLEND_FOG);
+ }
+ }
+}
diff --git a/mesalib/src/mesa/swrast/s_fragprog.c b/mesalib/src/mesa/swrast/s_fragprog.c
index ab411a2f0..b6bfeaed4 100644
--- a/mesalib/src/mesa/swrast/s_fragprog.c
+++ b/mesalib/src/mesa/swrast/s_fragprog.c
@@ -1,277 +1,277 @@
-/*
- * Mesa 3-D graphics library
- * Version: 7.0.3
- *
- * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#include "main/glheader.h"
-#include "main/colormac.h"
-#include "program/prog_instruction.h"
-
-#include "s_context.h"
-#include "s_fragprog.h"
-#include "s_span.h"
-
-
-/**
- * Apply texture object's swizzle (X/Y/Z/W/0/1) to incoming 'texel'
- * and return results in 'colorOut'.
- */
-static INLINE void
-swizzle_texel(const GLfloat texel[4], GLfloat colorOut[4], GLuint swizzle)
-{
- if (swizzle == SWIZZLE_NOOP) {
- COPY_4V(colorOut, texel);
- }
- else {
- GLfloat vector[6];
- vector[SWIZZLE_X] = texel[0];
- vector[SWIZZLE_Y] = texel[1];
- vector[SWIZZLE_Z] = texel[2];
- vector[SWIZZLE_W] = texel[3];
- vector[SWIZZLE_ZERO] = 0.0F;
- vector[SWIZZLE_ONE] = 1.0F;
- colorOut[0] = vector[GET_SWZ(swizzle, 0)];
- colorOut[1] = vector[GET_SWZ(swizzle, 1)];
- colorOut[2] = vector[GET_SWZ(swizzle, 2)];
- colorOut[3] = vector[GET_SWZ(swizzle, 3)];
- }
-}
-
-
-/**
- * Fetch a texel with given lod.
- * Called via machine->FetchTexelLod()
- */
-static void
-fetch_texel_lod( struct gl_context *ctx, const GLfloat texcoord[4], GLfloat lambda,
- GLuint unit, GLfloat color[4] )
-{
- const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
-
- if (texObj) {
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLfloat rgba[4];
-
- lambda = CLAMP(lambda, texObj->Sampler.MinLod, texObj->Sampler.MaxLod);
-
- swrast->TextureSample[unit](ctx, texObj, 1,
- (const GLfloat (*)[4]) texcoord,
- &lambda, &rgba);
- swizzle_texel(rgba, color, texObj->_Swizzle);
- }
- else {
- ASSIGN_4V(color, 0.0F, 0.0F, 0.0F, 1.0F);
- }
-}
-
-
-/**
- * Fetch a texel with the given partial derivatives to compute a level
- * of detail in the mipmap.
- * Called via machine->FetchTexelDeriv()
- * \param lodBias the lod bias which may be specified by a TXB instruction,
- * otherwise zero.
- */
-static void
-fetch_texel_deriv( struct gl_context *ctx, const GLfloat texcoord[4],
- const GLfloat texdx[4], const GLfloat texdy[4],
- GLfloat lodBias, GLuint unit, GLfloat color[4] )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
- const struct gl_texture_object *texObj = texUnit->_Current;
-
- if (texObj) {
- const struct gl_texture_image *texImg =
- texObj->Image[0][texObj->BaseLevel];
- const GLfloat texW = (GLfloat) texImg->WidthScale;
- const GLfloat texH = (GLfloat) texImg->HeightScale;
- GLfloat lambda;
- GLfloat rgba[4];
-
- lambda = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */
- texdx[1], texdy[1], /* dt/dx, dt/dy */
- texdx[3], texdy[3], /* dq/dx, dq/dy */
- texW, texH,
- texcoord[0], texcoord[1], texcoord[3],
- 1.0F / texcoord[3]);
-
- lambda += lodBias + texUnit->LodBias + texObj->Sampler.LodBias;
-
- lambda = CLAMP(lambda, texObj->Sampler.MinLod, texObj->Sampler.MaxLod);
-
- swrast->TextureSample[unit](ctx, texObj, 1,
- (const GLfloat (*)[4]) texcoord,
- &lambda, &rgba);
- swizzle_texel(rgba, color, texObj->_Swizzle);
- }
- else {
- ASSIGN_4V(color, 0.0F, 0.0F, 0.0F, 1.0F);
- }
-}
-
-
-/**
- * Initialize the virtual fragment program machine state prior to running
- * fragment program on a fragment. This involves initializing the input
- * registers, condition codes, etc.
- * \param machine the virtual machine state to init
- * \param program the fragment program we're about to run
- * \param span the span of pixels we'll operate on
- * \param col which element (column) of the span we'll operate on
- */
-static void
-init_machine(struct gl_context *ctx, struct gl_program_machine *machine,
- const struct gl_fragment_program *program,
- const SWspan *span, GLuint col)
-{
- GLfloat *wpos = span->array->attribs[FRAG_ATTRIB_WPOS][col];
-
- if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) {
- /* Clear temporary registers (undefined for ARB_f_p) */
- memset(machine->Temporaries, 0, MAX_PROGRAM_TEMPS * 4 * sizeof(GLfloat));
- }
-
- /* ARB_fragment_coord_conventions */
- if (program->OriginUpperLeft)
- wpos[1] = ctx->DrawBuffer->Height - 1 - wpos[1];
- if (!program->PixelCenterInteger) {
- wpos[0] += 0.5F;
- wpos[1] += 0.5F;
- }
-
- /* Setup pointer to input attributes */
- machine->Attribs = span->array->attribs;
-
- machine->DerivX = (GLfloat (*)[4]) span->attrStepX;
- machine->DerivY = (GLfloat (*)[4]) span->attrStepY;
- machine->NumDeriv = FRAG_ATTRIB_MAX;
-
- machine->Samplers = program->Base.SamplerUnits;
-
- /* if running a GLSL program (not ARB_fragment_program) */
- if (ctx->Shader.CurrentFragmentProgram) {
- /* Store front/back facing value */
- machine->Attribs[FRAG_ATTRIB_FACE][col][0] = 1.0F - span->facing;
- }
-
- machine->CurElement = col;
-
- /* init condition codes */
- machine->CondCodes[0] = COND_EQ;
- machine->CondCodes[1] = COND_EQ;
- machine->CondCodes[2] = COND_EQ;
- machine->CondCodes[3] = COND_EQ;
-
- /* init call stack */
- machine->StackDepth = 0;
-
- machine->FetchTexelLod = fetch_texel_lod;
- machine->FetchTexelDeriv = fetch_texel_deriv;
-}
-
-
-/**
- * Run fragment program on the pixels in span from 'start' to 'end' - 1.
- */
-static void
-run_program(struct gl_context *ctx, SWspan *span, GLuint start, GLuint end)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- const struct gl_fragment_program *program = ctx->FragmentProgram._Current;
- const GLbitfield64 outputsWritten = program->Base.OutputsWritten;
- struct gl_program_machine *machine = &swrast->FragProgMachine;
- GLuint i;
-
- for (i = start; i < end; i++) {
- if (span->array->mask[i]) {
- init_machine(ctx, machine, program, span, i);
-
- if (_mesa_execute_program(ctx, &program->Base, machine)) {
-
- /* Store result color */
- if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_COLOR)) {
- COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0][i],
- machine->Outputs[FRAG_RESULT_COLOR]);
- }
- else {
- /* Multiple drawbuffers / render targets
- * Note that colors beyond 0 and 1 will overwrite other
- * attributes, such as FOGC, TEX0, TEX1, etc. That's OK.
- */
- GLuint buf;
- for (buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) {
- if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DATA0 + buf)) {
- COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0 + buf][i],
- machine->Outputs[FRAG_RESULT_DATA0 + buf]);
- }
- }
- }
-
- /* Store result depth/z */
- if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
- const GLfloat depth = machine->Outputs[FRAG_RESULT_DEPTH][2];
- if (depth <= 0.0)
- span->array->z[i] = 0;
- else if (depth >= 1.0)
- span->array->z[i] = ctx->DrawBuffer->_DepthMax;
- else
- span->array->z[i] = IROUND(depth * ctx->DrawBuffer->_DepthMaxF);
- }
- }
- else {
- /* killed fragment */
- span->array->mask[i] = GL_FALSE;
- span->writeAll = GL_FALSE;
- }
- }
- }
-}
-
-
-/**
- * Execute the current fragment program for all the fragments
- * in the given span.
- */
-void
-_swrast_exec_fragment_program( struct gl_context *ctx, SWspan *span )
-{
- const struct gl_fragment_program *program = ctx->FragmentProgram._Current;
-
- /* incoming colors should be floats */
- if (program->Base.InputsRead & FRAG_BIT_COL0) {
- ASSERT(span->array->ChanType == GL_FLOAT);
- }
-
- run_program(ctx, span, 0, span->end);
-
- if (program->Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_COLOR)) {
- span->interpMask &= ~SPAN_RGBA;
- span->arrayMask |= SPAN_RGBA;
- }
-
- if (program->Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
- span->interpMask &= ~SPAN_Z;
- span->arrayMask |= SPAN_Z;
- }
-}
-
+/*
+ * Mesa 3-D graphics library
+ * Version: 7.0.3
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "program/prog_instruction.h"
+
+#include "s_context.h"
+#include "s_fragprog.h"
+#include "s_span.h"
+
+
+/**
+ * Apply texture object's swizzle (X/Y/Z/W/0/1) to incoming 'texel'
+ * and return results in 'colorOut'.
+ */
+static INLINE void
+swizzle_texel(const GLfloat texel[4], GLfloat colorOut[4], GLuint swizzle)
+{
+ if (swizzle == SWIZZLE_NOOP) {
+ COPY_4V(colorOut, texel);
+ }
+ else {
+ GLfloat vector[6];
+ vector[SWIZZLE_X] = texel[0];
+ vector[SWIZZLE_Y] = texel[1];
+ vector[SWIZZLE_Z] = texel[2];
+ vector[SWIZZLE_W] = texel[3];
+ vector[SWIZZLE_ZERO] = 0.0F;
+ vector[SWIZZLE_ONE] = 1.0F;
+ colorOut[0] = vector[GET_SWZ(swizzle, 0)];
+ colorOut[1] = vector[GET_SWZ(swizzle, 1)];
+ colorOut[2] = vector[GET_SWZ(swizzle, 2)];
+ colorOut[3] = vector[GET_SWZ(swizzle, 3)];
+ }
+}
+
+
+/**
+ * Fetch a texel with given lod.
+ * Called via machine->FetchTexelLod()
+ */
+static void
+fetch_texel_lod( struct gl_context *ctx, const GLfloat texcoord[4], GLfloat lambda,
+ GLuint unit, GLfloat color[4] )
+{
+ const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
+
+ if (texObj) {
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLfloat rgba[4];
+
+ lambda = CLAMP(lambda, texObj->Sampler.MinLod, texObj->Sampler.MaxLod);
+
+ swrast->TextureSample[unit](ctx, texObj, 1,
+ (const GLfloat (*)[4]) texcoord,
+ &lambda, &rgba);
+ swizzle_texel(rgba, color, texObj->_Swizzle);
+ }
+ else {
+ ASSIGN_4V(color, 0.0F, 0.0F, 0.0F, 1.0F);
+ }
+}
+
+
+/**
+ * Fetch a texel with the given partial derivatives to compute a level
+ * of detail in the mipmap.
+ * Called via machine->FetchTexelDeriv()
+ * \param lodBias the lod bias which may be specified by a TXB instruction,
+ * otherwise zero.
+ */
+static void
+fetch_texel_deriv( struct gl_context *ctx, const GLfloat texcoord[4],
+ const GLfloat texdx[4], const GLfloat texdy[4],
+ GLfloat lodBias, GLuint unit, GLfloat color[4] )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
+ const struct gl_texture_object *texObj = texUnit->_Current;
+
+ if (texObj) {
+ const struct gl_texture_image *texImg =
+ texObj->Image[0][texObj->BaseLevel];
+ const GLfloat texW = (GLfloat) texImg->WidthScale;
+ const GLfloat texH = (GLfloat) texImg->HeightScale;
+ GLfloat lambda;
+ GLfloat rgba[4];
+
+ lambda = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */
+ texdx[1], texdy[1], /* dt/dx, dt/dy */
+ texdx[3], texdy[3], /* dq/dx, dq/dy */
+ texW, texH,
+ texcoord[0], texcoord[1], texcoord[3],
+ 1.0F / texcoord[3]);
+
+ lambda += lodBias + texUnit->LodBias + texObj->Sampler.LodBias;
+
+ lambda = CLAMP(lambda, texObj->Sampler.MinLod, texObj->Sampler.MaxLod);
+
+ swrast->TextureSample[unit](ctx, texObj, 1,
+ (const GLfloat (*)[4]) texcoord,
+ &lambda, &rgba);
+ swizzle_texel(rgba, color, texObj->_Swizzle);
+ }
+ else {
+ ASSIGN_4V(color, 0.0F, 0.0F, 0.0F, 1.0F);
+ }
+}
+
+
+/**
+ * Initialize the virtual fragment program machine state prior to running
+ * fragment program on a fragment. This involves initializing the input
+ * registers, condition codes, etc.
+ * \param machine the virtual machine state to init
+ * \param program the fragment program we're about to run
+ * \param span the span of pixels we'll operate on
+ * \param col which element (column) of the span we'll operate on
+ */
+static void
+init_machine(struct gl_context *ctx, struct gl_program_machine *machine,
+ const struct gl_fragment_program *program,
+ const SWspan *span, GLuint col)
+{
+ GLfloat *wpos = span->array->attribs[FRAG_ATTRIB_WPOS][col];
+
+ if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) {
+ /* Clear temporary registers (undefined for ARB_f_p) */
+ memset(machine->Temporaries, 0, MAX_PROGRAM_TEMPS * 4 * sizeof(GLfloat));
+ }
+
+ /* ARB_fragment_coord_conventions */
+ if (program->OriginUpperLeft)
+ wpos[1] = ctx->DrawBuffer->Height - 1 - wpos[1];
+ if (!program->PixelCenterInteger) {
+ wpos[0] += 0.5F;
+ wpos[1] += 0.5F;
+ }
+
+ /* Setup pointer to input attributes */
+ machine->Attribs = span->array->attribs;
+
+ machine->DerivX = (GLfloat (*)[4]) span->attrStepX;
+ machine->DerivY = (GLfloat (*)[4]) span->attrStepY;
+ machine->NumDeriv = FRAG_ATTRIB_MAX;
+
+ machine->Samplers = program->Base.SamplerUnits;
+
+ /* if running a GLSL program (not ARB_fragment_program) */
+ if (ctx->Shader.CurrentFragmentProgram) {
+ /* Store front/back facing value */
+ machine->Attribs[FRAG_ATTRIB_FACE][col][0] = 1.0F - span->facing;
+ }
+
+ machine->CurElement = col;
+
+ /* init condition codes */
+ machine->CondCodes[0] = COND_EQ;
+ machine->CondCodes[1] = COND_EQ;
+ machine->CondCodes[2] = COND_EQ;
+ machine->CondCodes[3] = COND_EQ;
+
+ /* init call stack */
+ machine->StackDepth = 0;
+
+ machine->FetchTexelLod = fetch_texel_lod;
+ machine->FetchTexelDeriv = fetch_texel_deriv;
+}
+
+
+/**
+ * Run fragment program on the pixels in span from 'start' to 'end' - 1.
+ */
+static void
+run_program(struct gl_context *ctx, SWspan *span, GLuint start, GLuint end)
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const struct gl_fragment_program *program = ctx->FragmentProgram._Current;
+ const GLbitfield64 outputsWritten = program->Base.OutputsWritten;
+ struct gl_program_machine *machine = &swrast->FragProgMachine;
+ GLuint i;
+
+ for (i = start; i < end; i++) {
+ if (span->array->mask[i]) {
+ init_machine(ctx, machine, program, span, i);
+
+ if (_mesa_execute_program(ctx, &program->Base, machine)) {
+
+ /* Store result color */
+ if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_COLOR)) {
+ COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0][i],
+ machine->Outputs[FRAG_RESULT_COLOR]);
+ }
+ else {
+ /* Multiple drawbuffers / render targets
+ * Note that colors beyond 0 and 1 will overwrite other
+ * attributes, such as FOGC, TEX0, TEX1, etc. That's OK.
+ */
+ GLuint buf;
+ for (buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) {
+ if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DATA0 + buf)) {
+ COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0 + buf][i],
+ machine->Outputs[FRAG_RESULT_DATA0 + buf]);
+ }
+ }
+ }
+
+ /* Store result depth/z */
+ if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
+ const GLfloat depth = machine->Outputs[FRAG_RESULT_DEPTH][2];
+ if (depth <= 0.0)
+ span->array->z[i] = 0;
+ else if (depth >= 1.0)
+ span->array->z[i] = ctx->DrawBuffer->_DepthMax;
+ else
+ span->array->z[i] = IROUND(depth * ctx->DrawBuffer->_DepthMaxF);
+ }
+ }
+ else {
+ /* killed fragment */
+ span->array->mask[i] = GL_FALSE;
+ span->writeAll = GL_FALSE;
+ }
+ }
+ }
+}
+
+
+/**
+ * Execute the current fragment program for all the fragments
+ * in the given span.
+ */
+void
+_swrast_exec_fragment_program( struct gl_context *ctx, SWspan *span )
+{
+ const struct gl_fragment_program *program = ctx->FragmentProgram._Current;
+
+ /* incoming colors should be floats */
+ if (program->Base.InputsRead & FRAG_BIT_COL0) {
+ ASSERT(span->array->ChanType == GL_FLOAT);
+ }
+
+ run_program(ctx, span, 0, span->end);
+
+ if (program->Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_COLOR)) {
+ span->interpMask &= ~SPAN_RGBA;
+ span->arrayMask |= SPAN_RGBA;
+ }
+
+ if (program->Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
+ span->interpMask &= ~SPAN_Z;
+ span->arrayMask |= SPAN_Z;
+ }
+}
+
diff --git a/mesalib/src/mesa/swrast/s_readpix.c b/mesalib/src/mesa/swrast/s_readpix.c
index 49da247e9..6eec2fc78 100644
--- a/mesalib/src/mesa/swrast/s_readpix.c
+++ b/mesalib/src/mesa/swrast/s_readpix.c
@@ -1,514 +1,514 @@
-/*
- * Mesa 3-D graphics library
- * Version: 7.0.3
- *
- * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-#include "main/glheader.h"
-#include "main/colormac.h"
-#include "main/feedback.h"
-#include "main/formats.h"
-#include "main/image.h"
-#include "main/imports.h"
-#include "main/macros.h"
-#include "main/pack.h"
-#include "main/pbo.h"
-#include "main/state.h"
-
-#include "s_context.h"
-#include "s_depth.h"
-#include "s_span.h"
-#include "s_stencil.h"
-
-
-/**
- * Read pixels for format=GL_DEPTH_COMPONENT.
- */
-static void
-read_depth_pixels( struct gl_context *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum type, GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
-{
- struct gl_framebuffer *fb = ctx->ReadBuffer;
- struct gl_renderbuffer *rb = fb->_DepthBuffer;
- const GLboolean biasOrScale
- = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
-
- if (!rb)
- return;
-
- /* clipping should have been done already */
- ASSERT(x >= 0);
- ASSERT(y >= 0);
- ASSERT(x + width <= (GLint) rb->Width);
- ASSERT(y + height <= (GLint) rb->Height);
- /* width should never be > MAX_WIDTH since we did clipping earlier */
- ASSERT(width <= MAX_WIDTH);
-
- if (type == GL_UNSIGNED_SHORT && fb->Visual.depthBits == 16
- && !biasOrScale && !packing->SwapBytes) {
- /* Special case: directly read 16-bit unsigned depth values. */
- GLint j;
- ASSERT(rb->Format == MESA_FORMAT_Z16);
- ASSERT(rb->DataType == GL_UNSIGNED_SHORT);
- for (j = 0; j < height; j++, y++) {
- void *dest =_mesa_image_address2d(packing, pixels, width, height,
- GL_DEPTH_COMPONENT, type, j, 0);
- rb->GetRow(ctx, rb, width, x, y, dest);
- }
- }
- else if (type == GL_UNSIGNED_INT && fb->Visual.depthBits == 24
- && !biasOrScale && !packing->SwapBytes) {
- /* Special case: directly read 24-bit unsigned depth values. */
- GLint j;
- ASSERT(rb->Format == MESA_FORMAT_X8_Z24 ||
- rb->Format == MESA_FORMAT_S8_Z24 ||
- rb->Format == MESA_FORMAT_Z24_X8 ||
- rb->Format == MESA_FORMAT_Z24_S8);
- ASSERT(rb->DataType == GL_UNSIGNED_INT ||
- rb->DataType == GL_UNSIGNED_INT_24_8);
- for (j = 0; j < height; j++, y++) {
- GLuint *dest = (GLuint *)
- _mesa_image_address2d(packing, pixels, width, height,
- GL_DEPTH_COMPONENT, type, j, 0);
- GLint k;
- rb->GetRow(ctx, rb, width, x, y, dest);
- /* convert range from 24-bit to 32-bit */
- if (rb->Format == MESA_FORMAT_X8_Z24 ||
- rb->Format == MESA_FORMAT_S8_Z24) {
- for (k = 0; k < width; k++) {
- /* Note: put MSByte of 24-bit value into LSByte */
- dest[k] = (dest[k] << 8) | ((dest[k] >> 16) & 0xff);
- }
- }
- else {
- for (k = 0; k < width; k++) {
- /* Note: fill in LSByte by replication */
- dest[k] = dest[k] | ((dest[k] >> 8) & 0xff);
- }
- }
- }
- }
- else if (type == GL_UNSIGNED_INT && fb->Visual.depthBits == 32
- && !biasOrScale && !packing->SwapBytes) {
- /* Special case: directly read 32-bit unsigned depth values. */
- GLint j;
- ASSERT(rb->Format == MESA_FORMAT_Z32);
- ASSERT(rb->DataType == GL_UNSIGNED_INT);
- for (j = 0; j < height; j++, y++) {
- void *dest = _mesa_image_address2d(packing, pixels, width, height,
- GL_DEPTH_COMPONENT, type, j, 0);
- rb->GetRow(ctx, rb, width, x, y, dest);
- }
- }
- else {
- /* General case (slower) */
- GLint j;
- for (j = 0; j < height; j++, y++) {
- GLfloat depthValues[MAX_WIDTH];
- GLvoid *dest = _mesa_image_address2d(packing, pixels, width, height,
- GL_DEPTH_COMPONENT, type, j, 0);
- _swrast_read_depth_span_float(ctx, rb, width, x, y, depthValues);
- _mesa_pack_depth_span(ctx, width, dest, type, depthValues, packing);
- }
- }
-}
-
-
-/**
- * Read pixels for format=GL_STENCIL_INDEX.
- */
-static void
-read_stencil_pixels( struct gl_context *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum type, GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
-{
- struct gl_framebuffer *fb = ctx->ReadBuffer;
- struct gl_renderbuffer *rb = fb->_StencilBuffer;
- GLint j;
-
- if (!rb)
- return;
-
- /* width should never be > MAX_WIDTH since we did clipping earlier */
- ASSERT(width <= MAX_WIDTH);
-
- /* process image row by row */
- for (j=0;j<height;j++,y++) {
- GLvoid *dest;
- GLstencil stencil[MAX_WIDTH];
-
- _swrast_read_stencil_span(ctx, rb, width, x, y, stencil);
-
- dest = _mesa_image_address2d(packing, pixels, width, height,
- GL_STENCIL_INDEX, type, j, 0);
-
- _mesa_pack_stencil_span(ctx, width, type, dest, stencil, packing);
- }
-}
-
-
-
-/**
- * Optimized glReadPixels for particular pixel formats when pixel
- * scaling, biasing, mapping, etc. are disabled.
- * \return GL_TRUE if success, GL_FALSE if unable to do the readpixels
- */
-static GLboolean
-fast_read_rgba_pixels( struct gl_context *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing,
- GLbitfield transferOps)
-{
- struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
-
- if (!rb)
- return GL_FALSE;
-
- ASSERT(rb->_BaseFormat == GL_RGBA ||
- rb->_BaseFormat == GL_RGB ||
- rb->_BaseFormat == GL_RG ||
- rb->_BaseFormat == GL_RED ||
- rb->_BaseFormat == GL_LUMINANCE ||
- rb->_BaseFormat == GL_INTENSITY ||
- rb->_BaseFormat == GL_LUMINANCE_ALPHA ||
- rb->_BaseFormat == GL_ALPHA);
-
- /* clipping should have already been done */
- ASSERT(x + width <= (GLint) rb->Width);
- ASSERT(y + height <= (GLint) rb->Height);
-
- /* check for things we can't handle here */
- if (transferOps ||
- packing->SwapBytes ||
- packing->LsbFirst) {
- return GL_FALSE;
- }
-
- if (format == GL_RGBA && rb->DataType == type) {
- const GLint dstStride = _mesa_image_row_stride(packing, width,
- format, type);
- GLubyte *dest
- = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
- format, type, 0, 0);
- GLint row;
- ASSERT(rb->GetRow);
- for (row = 0; row < height; row++) {
- rb->GetRow(ctx, rb, width, x, y + row, dest);
- dest += dstStride;
- }
- return GL_TRUE;
- }
-
- if (format == GL_RGB &&
- rb->DataType == GL_UNSIGNED_BYTE &&
- type == GL_UNSIGNED_BYTE) {
- const GLint dstStride = _mesa_image_row_stride(packing, width,
- format, type);
- GLubyte *dest
- = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
- format, type, 0, 0);
- GLint row;
- ASSERT(rb->GetRow);
- for (row = 0; row < height; row++) {
- GLubyte tempRow[MAX_WIDTH][4];
- GLint col;
- rb->GetRow(ctx, rb, width, x, y + row, tempRow);
- /* convert RGBA to RGB */
- for (col = 0; col < width; col++) {
- dest[col * 3 + 0] = tempRow[col][0];
- dest[col * 3 + 1] = tempRow[col][1];
- dest[col * 3 + 2] = tempRow[col][2];
- }
- dest += dstStride;
- }
- return GL_TRUE;
- }
-
- /* not handled */
- return GL_FALSE;
-}
-
-
-/**
- * When we're using a low-precision color buffer (like 16-bit 5/6/5)
- * we have to adjust our color values a bit to pass conformance.
- * The problem is when a 5 or 6-bit color value is converted to an 8-bit
- * value and then a floating point value, the floating point values don't
- * increment uniformly as the 5 or 6-bit value is incremented.
- *
- * This function adjusts floating point values to compensate.
- */
-static void
-adjust_colors(const struct gl_framebuffer *fb, GLuint n, GLfloat rgba[][4])
-{
- const GLuint rShift = 8 - fb->Visual.redBits;
- const GLuint gShift = 8 - fb->Visual.greenBits;
- const GLuint bShift = 8 - fb->Visual.blueBits;
- GLfloat rScale = 1.0F / (GLfloat) ((1 << fb->Visual.redBits ) - 1);
- GLfloat gScale = 1.0F / (GLfloat) ((1 << fb->Visual.greenBits) - 1);
- GLfloat bScale = 1.0F / (GLfloat) ((1 << fb->Visual.blueBits ) - 1);
- GLuint i;
-
- if (fb->Visual.redBits == 0)
- rScale = 0;
- if (fb->Visual.greenBits == 0)
- gScale = 0;
- if (fb->Visual.blueBits == 0)
- bScale = 0;
-
- for (i = 0; i < n; i++) {
- GLint r, g, b;
- /* convert float back to ubyte */
- CLAMPED_FLOAT_TO_UBYTE(r, rgba[i][RCOMP]);
- CLAMPED_FLOAT_TO_UBYTE(g, rgba[i][GCOMP]);
- CLAMPED_FLOAT_TO_UBYTE(b, rgba[i][BCOMP]);
- /* using only the N most significant bits of the ubyte value, convert to
- * float in [0,1].
- */
- rgba[i][RCOMP] = (GLfloat) (r >> rShift) * rScale;
- rgba[i][GCOMP] = (GLfloat) (g >> gShift) * gScale;
- rgba[i][BCOMP] = (GLfloat) (b >> bShift) * bScale;
- }
-}
-
-
-
-/*
- * Read R, G, B, A, RGB, L, or LA pixels.
- */
-static void
-read_rgba_pixels( struct gl_context *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type, GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLbitfield transferOps = ctx->_ImageTransferState;
- struct gl_framebuffer *fb = ctx->ReadBuffer;
- struct gl_renderbuffer *rb = fb->_ColorReadBuffer;
-
- if (!rb)
- return;
-
- if ((ctx->Color._ClampReadColor == GL_TRUE || type != GL_FLOAT) &&
- !_mesa_is_integer_format(format)) {
- transferOps |= IMAGE_CLAMP_BIT;
- }
-
- /* Try the optimized path first. */
- if (fast_read_rgba_pixels(ctx, x, y, width, height,
- format, type, pixels, packing, transferOps)) {
- return; /* done! */
- }
-
- /* width should never be > MAX_WIDTH since we did clipping earlier */
- ASSERT(width <= MAX_WIDTH);
-
- {
- const GLint dstStride
- = _mesa_image_row_stride(packing, width, format, type);
- GLfloat (*rgba)[4] = swrast->SpanArrays->attribs[FRAG_ATTRIB_COL0];
- GLint row;
- GLubyte *dst
- = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
- format, type, 0, 0);
-
- for (row = 0; row < height; row++, y++) {
-
- /* Get float rgba pixels */
- _swrast_read_rgba_span(ctx, rb, width, x, y, GL_FLOAT, rgba);
-
- /* apply fudge factor for shallow color buffers */
- if ((fb->Visual.redBits < 8 && fb->Visual.redBits != 0) ||
- (fb->Visual.greenBits < 8 && fb->Visual.greenBits != 0) ||
- (fb->Visual.blueBits < 8 && fb->Visual.blueBits != 0)) {
- adjust_colors(fb, width, rgba);
- }
-
- /* pack the row of RGBA pixels into user's buffer */
- _mesa_pack_rgba_span_float(ctx, width, rgba, format, type, dst,
- packing, transferOps);
-
- dst += dstStride;
- }
- }
-}
-
-
-/**
- * Read combined depth/stencil values.
- * We'll have already done error checking to be sure the expected
- * depth and stencil buffers really exist.
- */
-static void
-read_depth_stencil_pixels(struct gl_context *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum type, GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
-{
- const GLboolean scaleOrBias
- = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
- const GLboolean stencilTransfer = ctx->Pixel.IndexShift
- || ctx->Pixel.IndexOffset || ctx->Pixel.MapStencilFlag;
- struct gl_renderbuffer *depthRb, *stencilRb;
-
- depthRb = ctx->ReadBuffer->_DepthBuffer;
- stencilRb = ctx->ReadBuffer->_StencilBuffer;
-
- if (!depthRb || !stencilRb)
- return;
-
- depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
- stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
-
- if (depthRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
- stencilRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
- depthRb == stencilRb &&
- !scaleOrBias &&
- !stencilTransfer) {
- /* This is the ideal case.
- * Reading GL_DEPTH_STENCIL pixels from combined depth/stencil buffer.
- * Plus, no pixel transfer ops to worry about!
- */
- GLint i;
- GLint dstStride = _mesa_image_row_stride(packing, width,
- GL_DEPTH_STENCIL_EXT, type);
- GLubyte *dst = (GLubyte *) _mesa_image_address2d(packing, pixels,
- width, height,
- GL_DEPTH_STENCIL_EXT,
- type, 0, 0);
- for (i = 0; i < height; i++) {
- depthRb->GetRow(ctx, depthRb, width, x, y + i, dst);
- dst += dstStride;
- }
- }
- else {
- /* Reading GL_DEPTH_STENCIL pixels from separate depth/stencil buffers,
- * or we need pixel transfer.
- */
- GLint i;
- depthRb = ctx->ReadBuffer->_DepthBuffer;
- stencilRb = ctx->ReadBuffer->_StencilBuffer;
-
- for (i = 0; i < height; i++) {
- GLstencil stencilVals[MAX_WIDTH];
-
- GLuint *depthStencilDst = (GLuint *)
- _mesa_image_address2d(packing, pixels, width, height,
- GL_DEPTH_STENCIL_EXT, type, i, 0);
-
- _swrast_read_stencil_span(ctx, stencilRb, width,
- x, y + i, stencilVals);
-
- if (!scaleOrBias && !stencilTransfer
- && ctx->ReadBuffer->Visual.depthBits == 24) {
- /* ideal case */
- GLuint zVals[MAX_WIDTH]; /* 24-bit values! */
- GLint j;
- ASSERT(depthRb->DataType == GL_UNSIGNED_INT);
- /* note, we've already been clipped */
- depthRb->GetRow(ctx, depthRb, width, x, y + i, zVals);
- for (j = 0; j < width; j++) {
- depthStencilDst[j] = (zVals[j] << 8) | (stencilVals[j] & 0xff);
- }
- }
- else {
- /* general case */
- GLfloat depthVals[MAX_WIDTH];
- _swrast_read_depth_span_float(ctx, depthRb, width, x, y + i,
- depthVals);
- _mesa_pack_depth_stencil_span(ctx, width, type, depthStencilDst,
- depthVals, stencilVals, packing);
- }
- }
- }
-}
-
-
-
-/**
- * Software fallback routine for ctx->Driver.ReadPixels().
- * By time we get here, all error checking will have been done.
- */
-void
-_swrast_ReadPixels( struct gl_context *ctx,
- GLint x, GLint y, GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- const struct gl_pixelstore_attrib *packing,
- GLvoid *pixels )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct gl_pixelstore_attrib clippedPacking = *packing;
-
- if (ctx->NewState)
- _mesa_update_state(ctx);
-
- /* Need to do swrast_render_start() before clipping or anything else
- * since this is where a driver may grab the hw lock and get an updated
- * window size.
- */
- swrast_render_start(ctx);
-
- if (swrast->NewState)
- _swrast_validate_derived( ctx );
-
- /* Do all needed clipping here, so that we can forget about it later */
- if (_mesa_clip_readpixels(ctx, &x, &y, &width, &height, &clippedPacking)) {
-
- pixels = _mesa_map_pbo_dest(ctx, &clippedPacking, pixels);
-
- if (pixels) {
- switch (format) {
- case GL_STENCIL_INDEX:
- read_stencil_pixels(ctx, x, y, width, height, type, pixels,
- &clippedPacking);
- break;
- case GL_DEPTH_COMPONENT:
- read_depth_pixels(ctx, x, y, width, height, type, pixels,
- &clippedPacking);
- break;
- case GL_DEPTH_STENCIL_EXT:
- read_depth_stencil_pixels(ctx, x, y, width, height, type, pixels,
- &clippedPacking);
- break;
- default:
- /* all other formats should be color formats */
- read_rgba_pixels(ctx, x, y, width, height, format, type, pixels,
- &clippedPacking);
- }
-
- _mesa_unmap_pbo_dest(ctx, &clippedPacking);
- }
- }
-
- swrast_render_finish(ctx);
-}
+/*
+ * Mesa 3-D graphics library
+ * Version: 7.0.3
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/feedback.h"
+#include "main/formats.h"
+#include "main/image.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "main/pack.h"
+#include "main/pbo.h"
+#include "main/state.h"
+
+#include "s_context.h"
+#include "s_depth.h"
+#include "s_span.h"
+#include "s_stencil.h"
+
+
+/**
+ * Read pixels for format=GL_DEPTH_COMPONENT.
+ */
+static void
+read_depth_pixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb = fb->_DepthBuffer;
+ const GLboolean biasOrScale
+ = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
+
+ if (!rb)
+ return;
+
+ /* clipping should have been done already */
+ ASSERT(x >= 0);
+ ASSERT(y >= 0);
+ ASSERT(x + width <= (GLint) rb->Width);
+ ASSERT(y + height <= (GLint) rb->Height);
+ /* width should never be > MAX_WIDTH since we did clipping earlier */
+ ASSERT(width <= MAX_WIDTH);
+
+ if (type == GL_UNSIGNED_SHORT && fb->Visual.depthBits == 16
+ && !biasOrScale && !packing->SwapBytes) {
+ /* Special case: directly read 16-bit unsigned depth values. */
+ GLint j;
+ ASSERT(rb->Format == MESA_FORMAT_Z16);
+ ASSERT(rb->DataType == GL_UNSIGNED_SHORT);
+ for (j = 0; j < height; j++, y++) {
+ void *dest =_mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, j, 0);
+ rb->GetRow(ctx, rb, width, x, y, dest);
+ }
+ }
+ else if (type == GL_UNSIGNED_INT && fb->Visual.depthBits == 24
+ && !biasOrScale && !packing->SwapBytes) {
+ /* Special case: directly read 24-bit unsigned depth values. */
+ GLint j;
+ ASSERT(rb->Format == MESA_FORMAT_X8_Z24 ||
+ rb->Format == MESA_FORMAT_S8_Z24 ||
+ rb->Format == MESA_FORMAT_Z24_X8 ||
+ rb->Format == MESA_FORMAT_Z24_S8);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT ||
+ rb->DataType == GL_UNSIGNED_INT_24_8);
+ for (j = 0; j < height; j++, y++) {
+ GLuint *dest = (GLuint *)
+ _mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, j, 0);
+ GLint k;
+ rb->GetRow(ctx, rb, width, x, y, dest);
+ /* convert range from 24-bit to 32-bit */
+ if (rb->Format == MESA_FORMAT_X8_Z24 ||
+ rb->Format == MESA_FORMAT_S8_Z24) {
+ for (k = 0; k < width; k++) {
+ /* Note: put MSByte of 24-bit value into LSByte */
+ dest[k] = (dest[k] << 8) | ((dest[k] >> 16) & 0xff);
+ }
+ }
+ else {
+ for (k = 0; k < width; k++) {
+ /* Note: fill in LSByte by replication */
+ dest[k] = dest[k] | ((dest[k] >> 8) & 0xff);
+ }
+ }
+ }
+ }
+ else if (type == GL_UNSIGNED_INT && fb->Visual.depthBits == 32
+ && !biasOrScale && !packing->SwapBytes) {
+ /* Special case: directly read 32-bit unsigned depth values. */
+ GLint j;
+ ASSERT(rb->Format == MESA_FORMAT_Z32);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+ for (j = 0; j < height; j++, y++) {
+ void *dest = _mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, j, 0);
+ rb->GetRow(ctx, rb, width, x, y, dest);
+ }
+ }
+ else {
+ /* General case (slower) */
+ GLint j;
+ for (j = 0; j < height; j++, y++) {
+ GLfloat depthValues[MAX_WIDTH];
+ GLvoid *dest = _mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_COMPONENT, type, j, 0);
+ _swrast_read_depth_span_float(ctx, rb, width, x, y, depthValues);
+ _mesa_pack_depth_span(ctx, width, dest, type, depthValues, packing);
+ }
+ }
+}
+
+
+/**
+ * Read pixels for format=GL_STENCIL_INDEX.
+ */
+static void
+read_stencil_pixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb = fb->_StencilBuffer;
+ GLint j;
+
+ if (!rb)
+ return;
+
+ /* width should never be > MAX_WIDTH since we did clipping earlier */
+ ASSERT(width <= MAX_WIDTH);
+
+ /* process image row by row */
+ for (j=0;j<height;j++,y++) {
+ GLvoid *dest;
+ GLstencil stencil[MAX_WIDTH];
+
+ _swrast_read_stencil_span(ctx, rb, width, x, y, stencil);
+
+ dest = _mesa_image_address2d(packing, pixels, width, height,
+ GL_STENCIL_INDEX, type, j, 0);
+
+ _mesa_pack_stencil_span(ctx, width, type, dest, stencil, packing);
+ }
+}
+
+
+
+/**
+ * Optimized glReadPixels for particular pixel formats when pixel
+ * scaling, biasing, mapping, etc. are disabled.
+ * \return GL_TRUE if success, GL_FALSE if unable to do the readpixels
+ */
+static GLboolean
+fast_read_rgba_pixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing,
+ GLbitfield transferOps)
+{
+ struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
+
+ if (!rb)
+ return GL_FALSE;
+
+ ASSERT(rb->_BaseFormat == GL_RGBA ||
+ rb->_BaseFormat == GL_RGB ||
+ rb->_BaseFormat == GL_RG ||
+ rb->_BaseFormat == GL_RED ||
+ rb->_BaseFormat == GL_LUMINANCE ||
+ rb->_BaseFormat == GL_INTENSITY ||
+ rb->_BaseFormat == GL_LUMINANCE_ALPHA ||
+ rb->_BaseFormat == GL_ALPHA);
+
+ /* clipping should have already been done */
+ ASSERT(x + width <= (GLint) rb->Width);
+ ASSERT(y + height <= (GLint) rb->Height);
+
+ /* check for things we can't handle here */
+ if (transferOps ||
+ packing->SwapBytes ||
+ packing->LsbFirst) {
+ return GL_FALSE;
+ }
+
+ if (format == GL_RGBA && rb->DataType == type) {
+ const GLint dstStride = _mesa_image_row_stride(packing, width,
+ format, type);
+ GLubyte *dest
+ = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
+ format, type, 0, 0);
+ GLint row;
+ ASSERT(rb->GetRow);
+ for (row = 0; row < height; row++) {
+ rb->GetRow(ctx, rb, width, x, y + row, dest);
+ dest += dstStride;
+ }
+ return GL_TRUE;
+ }
+
+ if (format == GL_RGB &&
+ rb->DataType == GL_UNSIGNED_BYTE &&
+ type == GL_UNSIGNED_BYTE) {
+ const GLint dstStride = _mesa_image_row_stride(packing, width,
+ format, type);
+ GLubyte *dest
+ = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
+ format, type, 0, 0);
+ GLint row;
+ ASSERT(rb->GetRow);
+ for (row = 0; row < height; row++) {
+ GLubyte tempRow[MAX_WIDTH][4];
+ GLint col;
+ rb->GetRow(ctx, rb, width, x, y + row, tempRow);
+ /* convert RGBA to RGB */
+ for (col = 0; col < width; col++) {
+ dest[col * 3 + 0] = tempRow[col][0];
+ dest[col * 3 + 1] = tempRow[col][1];
+ dest[col * 3 + 2] = tempRow[col][2];
+ }
+ dest += dstStride;
+ }
+ return GL_TRUE;
+ }
+
+ /* not handled */
+ return GL_FALSE;
+}
+
+
+/**
+ * When we're using a low-precision color buffer (like 16-bit 5/6/5)
+ * we have to adjust our color values a bit to pass conformance.
+ * The problem is when a 5 or 6-bit color value is converted to an 8-bit
+ * value and then a floating point value, the floating point values don't
+ * increment uniformly as the 5 or 6-bit value is incremented.
+ *
+ * This function adjusts floating point values to compensate.
+ */
+static void
+adjust_colors(const struct gl_framebuffer *fb, GLuint n, GLfloat rgba[][4])
+{
+ const GLuint rShift = 8 - fb->Visual.redBits;
+ const GLuint gShift = 8 - fb->Visual.greenBits;
+ const GLuint bShift = 8 - fb->Visual.blueBits;
+ GLfloat rScale = 1.0F / (GLfloat) ((1 << fb->Visual.redBits ) - 1);
+ GLfloat gScale = 1.0F / (GLfloat) ((1 << fb->Visual.greenBits) - 1);
+ GLfloat bScale = 1.0F / (GLfloat) ((1 << fb->Visual.blueBits ) - 1);
+ GLuint i;
+
+ if (fb->Visual.redBits == 0)
+ rScale = 0;
+ if (fb->Visual.greenBits == 0)
+ gScale = 0;
+ if (fb->Visual.blueBits == 0)
+ bScale = 0;
+
+ for (i = 0; i < n; i++) {
+ GLint r, g, b;
+ /* convert float back to ubyte */
+ CLAMPED_FLOAT_TO_UBYTE(r, rgba[i][RCOMP]);
+ CLAMPED_FLOAT_TO_UBYTE(g, rgba[i][GCOMP]);
+ CLAMPED_FLOAT_TO_UBYTE(b, rgba[i][BCOMP]);
+ /* using only the N most significant bits of the ubyte value, convert to
+ * float in [0,1].
+ */
+ rgba[i][RCOMP] = (GLfloat) (r >> rShift) * rScale;
+ rgba[i][GCOMP] = (GLfloat) (g >> gShift) * gScale;
+ rgba[i][BCOMP] = (GLfloat) (b >> bShift) * bScale;
+ }
+}
+
+
+
+/*
+ * Read R, G, B, A, RGB, L, or LA pixels.
+ */
+static void
+read_rgba_pixels( struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLbitfield transferOps = ctx->_ImageTransferState;
+ struct gl_framebuffer *fb = ctx->ReadBuffer;
+ struct gl_renderbuffer *rb = fb->_ColorReadBuffer;
+
+ if (!rb)
+ return;
+
+ if ((ctx->Color._ClampReadColor == GL_TRUE || type != GL_FLOAT) &&
+ !_mesa_is_integer_format(format)) {
+ transferOps |= IMAGE_CLAMP_BIT;
+ }
+
+ /* Try the optimized path first. */
+ if (fast_read_rgba_pixels(ctx, x, y, width, height,
+ format, type, pixels, packing, transferOps)) {
+ return; /* done! */
+ }
+
+ /* width should never be > MAX_WIDTH since we did clipping earlier */
+ ASSERT(width <= MAX_WIDTH);
+
+ {
+ const GLint dstStride
+ = _mesa_image_row_stride(packing, width, format, type);
+ GLfloat (*rgba)[4] = swrast->SpanArrays->attribs[FRAG_ATTRIB_COL0];
+ GLint row;
+ GLubyte *dst
+ = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
+ format, type, 0, 0);
+
+ for (row = 0; row < height; row++, y++) {
+
+ /* Get float rgba pixels */
+ _swrast_read_rgba_span(ctx, rb, width, x, y, GL_FLOAT, rgba);
+
+ /* apply fudge factor for shallow color buffers */
+ if ((fb->Visual.redBits < 8 && fb->Visual.redBits != 0) ||
+ (fb->Visual.greenBits < 8 && fb->Visual.greenBits != 0) ||
+ (fb->Visual.blueBits < 8 && fb->Visual.blueBits != 0)) {
+ adjust_colors(fb, width, rgba);
+ }
+
+ /* pack the row of RGBA pixels into user's buffer */
+ _mesa_pack_rgba_span_float(ctx, width, rgba, format, type, dst,
+ packing, transferOps);
+
+ dst += dstStride;
+ }
+ }
+}
+
+
+/**
+ * Read combined depth/stencil values.
+ * We'll have already done error checking to be sure the expected
+ * depth and stencil buffers really exist.
+ */
+static void
+read_depth_stencil_pixels(struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type, GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing )
+{
+ const GLboolean scaleOrBias
+ = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
+ const GLboolean stencilTransfer = ctx->Pixel.IndexShift
+ || ctx->Pixel.IndexOffset || ctx->Pixel.MapStencilFlag;
+ struct gl_renderbuffer *depthRb, *stencilRb;
+
+ depthRb = ctx->ReadBuffer->_DepthBuffer;
+ stencilRb = ctx->ReadBuffer->_StencilBuffer;
+
+ if (!depthRb || !stencilRb)
+ return;
+
+ depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
+ stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
+
+ if (depthRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
+ stencilRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
+ depthRb == stencilRb &&
+ !scaleOrBias &&
+ !stencilTransfer) {
+ /* This is the ideal case.
+ * Reading GL_DEPTH_STENCIL pixels from combined depth/stencil buffer.
+ * Plus, no pixel transfer ops to worry about!
+ */
+ GLint i;
+ GLint dstStride = _mesa_image_row_stride(packing, width,
+ GL_DEPTH_STENCIL_EXT, type);
+ GLubyte *dst = (GLubyte *) _mesa_image_address2d(packing, pixels,
+ width, height,
+ GL_DEPTH_STENCIL_EXT,
+ type, 0, 0);
+ for (i = 0; i < height; i++) {
+ depthRb->GetRow(ctx, depthRb, width, x, y + i, dst);
+ dst += dstStride;
+ }
+ }
+ else {
+ /* Reading GL_DEPTH_STENCIL pixels from separate depth/stencil buffers,
+ * or we need pixel transfer.
+ */
+ GLint i;
+ depthRb = ctx->ReadBuffer->_DepthBuffer;
+ stencilRb = ctx->ReadBuffer->_StencilBuffer;
+
+ for (i = 0; i < height; i++) {
+ GLstencil stencilVals[MAX_WIDTH];
+
+ GLuint *depthStencilDst = (GLuint *)
+ _mesa_image_address2d(packing, pixels, width, height,
+ GL_DEPTH_STENCIL_EXT, type, i, 0);
+
+ _swrast_read_stencil_span(ctx, stencilRb, width,
+ x, y + i, stencilVals);
+
+ if (!scaleOrBias && !stencilTransfer
+ && ctx->ReadBuffer->Visual.depthBits == 24) {
+ /* ideal case */
+ GLuint zVals[MAX_WIDTH]; /* 24-bit values! */
+ GLint j;
+ ASSERT(depthRb->DataType == GL_UNSIGNED_INT);
+ /* note, we've already been clipped */
+ depthRb->GetRow(ctx, depthRb, width, x, y + i, zVals);
+ for (j = 0; j < width; j++) {
+ depthStencilDst[j] = (zVals[j] << 8) | (stencilVals[j] & 0xff);
+ }
+ }
+ else {
+ /* general case */
+ GLfloat depthVals[MAX_WIDTH];
+ _swrast_read_depth_span_float(ctx, depthRb, width, x, y + i,
+ depthVals);
+ _mesa_pack_depth_stencil_span(ctx, width, type, depthStencilDst,
+ depthVals, stencilVals, packing);
+ }
+ }
+ }
+}
+
+
+
+/**
+ * Software fallback routine for ctx->Driver.ReadPixels().
+ * By time we get here, all error checking will have been done.
+ */
+void
+_swrast_ReadPixels( struct gl_context *ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *packing,
+ GLvoid *pixels )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ struct gl_pixelstore_attrib clippedPacking = *packing;
+
+ if (ctx->NewState)
+ _mesa_update_state(ctx);
+
+ /* Need to do swrast_render_start() before clipping or anything else
+ * since this is where a driver may grab the hw lock and get an updated
+ * window size.
+ */
+ swrast_render_start(ctx);
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ /* Do all needed clipping here, so that we can forget about it later */
+ if (_mesa_clip_readpixels(ctx, &x, &y, &width, &height, &clippedPacking)) {
+
+ pixels = _mesa_map_pbo_dest(ctx, &clippedPacking, pixels);
+
+ if (pixels) {
+ switch (format) {
+ case GL_STENCIL_INDEX:
+ read_stencil_pixels(ctx, x, y, width, height, type, pixels,
+ &clippedPacking);
+ break;
+ case GL_DEPTH_COMPONENT:
+ read_depth_pixels(ctx, x, y, width, height, type, pixels,
+ &clippedPacking);
+ break;
+ case GL_DEPTH_STENCIL_EXT:
+ read_depth_stencil_pixels(ctx, x, y, width, height, type, pixels,
+ &clippedPacking);
+ break;
+ default:
+ /* all other formats should be color formats */
+ read_rgba_pixels(ctx, x, y, width, height, format, type, pixels,
+ &clippedPacking);
+ }
+
+ _mesa_unmap_pbo_dest(ctx, &clippedPacking);
+ }
+ }
+
+ swrast_render_finish(ctx);
+}
diff --git a/mesalib/src/mesa/swrast/s_texrender.c b/mesalib/src/mesa/swrast/s_texrender.c
index b7239a71d..52d03c92a 100644
--- a/mesalib/src/mesa/swrast/s_texrender.c
+++ b/mesalib/src/mesa/swrast/s_texrender.c
@@ -1,654 +1,654 @@
-
-#include "main/context.h"
-#include "main/colormac.h"
-#include "main/fbobject.h"
-#include "main/macros.h"
-#include "main/texfetch.h"
-#include "main/teximage.h"
-#include "main/renderbuffer.h"
-#include "swrast/swrast.h"
-
-
-/*
- * Render-to-texture code for GL_EXT_framebuffer_object
- */
-
-
-/**
- * Derived from gl_renderbuffer class
- */
-struct texture_renderbuffer
-{
- struct gl_renderbuffer Base; /**< Base class object */
- struct gl_texture_image *TexImage;
- StoreTexelFunc Store;
- FetchTexelFuncF Fetchf;
- GLint Yoffset; /**< Layer for 1D array textures. */
- GLint Zoffset; /**< Layer for 2D array textures, or slice
- * for 3D textures
- */
-};
-
-
-/**
- * Get row of values from the renderbuffer that wraps a texture image.
- */
-static void
-texture_get_row(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
- GLint x, GLint y, void *values)
-{
- const struct texture_renderbuffer *trb
- = (const struct texture_renderbuffer *) rb;
- const GLint z = trb->Zoffset;
- GLuint i;
-
- ASSERT(trb->TexImage->Width == rb->Width);
- ASSERT(trb->TexImage->Height == rb->Height);
-
- y += trb->Yoffset;
-
- if (rb->DataType == CHAN_TYPE) {
- GLchan *rgbaOut = (GLchan *) values;
- for (i = 0; i < count; i++) {
- GLfloat rgba[4];
- trb->Fetchf(trb->TexImage, x + i, y, z, rgba);
- UNCLAMPED_FLOAT_TO_RGBA_CHAN(rgbaOut + 4 * i, rgba);
- }
- }
- else if (rb->DataType == GL_UNSIGNED_SHORT) {
- GLushort *zValues = (GLushort *) values;
- for (i = 0; i < count; i++) {
- GLfloat flt;
- trb->Fetchf(trb->TexImage, x + i, y, z, &flt);
- zValues[i] = (GLushort) (flt * 0xffff);
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT) {
- GLuint *zValues = (GLuint *) values;
- /*
- const GLdouble scale = (GLdouble) 0xffffffff;
- */
- for (i = 0; i < count; i++) {
- GLfloat flt;
- trb->Fetchf(trb->TexImage, x + i, y, z, &flt);
-#if 0
- /* this should work, but doesn't (overflow due to low precision) */
- zValues[i] = (GLuint) (flt * scale);
-#else
- /* temporary hack */
- zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;
-#endif
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
- GLuint *zValues = (GLuint *) values;
- for (i = 0; i < count; i++) {
- GLfloat flt;
- trb->Fetchf(trb->TexImage, x + i, y, z, &flt);
- zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
- GLuint *zValues = (GLuint *) values;
- for (i = 0; i < count; i++) {
- GLfloat flt;
- trb->Fetchf(trb->TexImage, x + i, y, z, &flt);
- zValues[i] = (GLuint) (flt * 0xffffff);
- }
- }
- else {
- _mesa_problem(ctx, "invalid rb->DataType in texture_get_row");
- }
-}
-
-
-static void
-texture_get_values(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
- const GLint x[], const GLint y[], void *values)
-{
- const struct texture_renderbuffer *trb
- = (const struct texture_renderbuffer *) rb;
- const GLint z = trb->Zoffset;
- GLuint i;
-
- if (rb->DataType == CHAN_TYPE) {
- GLchan *rgbaOut = (GLchan *) values;
- for (i = 0; i < count; i++) {
- GLfloat rgba[4];
- trb->Fetchf(trb->TexImage, x[i], y[i] + trb->Yoffset,
- z, rgba);
- UNCLAMPED_FLOAT_TO_RGBA_CHAN(rgbaOut + 4 * i, rgba);
- }
- }
- else if (rb->DataType == GL_UNSIGNED_SHORT) {
- GLushort *zValues = (GLushort *) values;
- for (i = 0; i < count; i++) {
- GLfloat flt;
- trb->Fetchf(trb->TexImage, x[i], y[i] + trb->Yoffset,
- z, &flt);
- zValues[i] = (GLushort) (flt * 0xffff);
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT) {
- GLuint *zValues = (GLuint *) values;
- for (i = 0; i < count; i++) {
- GLfloat flt;
- trb->Fetchf(trb->TexImage, x[i], y[i] + trb->Yoffset,
- z, &flt);
-#if 0
- zValues[i] = (GLuint) (flt * 0xffffffff);
-#else
- zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;
-#endif
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
- GLuint *zValues = (GLuint *) values;
- for (i = 0; i < count; i++) {
- GLfloat flt;
- trb->Fetchf(trb->TexImage, x[i], y[i] + trb->Yoffset,
- z, &flt);
- zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
- GLuint *zValues = (GLuint *) values;
- for (i = 0; i < count; i++) {
- GLfloat flt;
- trb->Fetchf(trb->TexImage, x[i], y[i] + trb->Yoffset,
- z, &flt);
- zValues[i] = (GLuint) (flt * 0xffffff);
- }
- }
- else {
- _mesa_problem(ctx, "invalid rb->DataType in texture_get_values");
- }
-}
-
-
-/**
- * Put row of values into a renderbuffer that wraps a texture image.
- */
-static void
-texture_put_row(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
- GLint x, GLint y, const void *values, const GLubyte *mask)
-{
- const struct texture_renderbuffer *trb
- = (const struct texture_renderbuffer *) rb;
- const GLint z = trb->Zoffset;
- GLuint i;
-
- y += trb->Yoffset;
-
- if (rb->DataType == CHAN_TYPE) {
- const GLchan *rgba = (const GLchan *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x + i, y, z, rgba);
- }
- rgba += 4;
- }
- }
- else if (rb->DataType == GL_UNSIGNED_SHORT) {
- const GLushort *zValues = (const GLushort *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x + i, y, z, zValues + i);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT) {
- const GLuint *zValues = (const GLuint *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x + i, y, z, zValues + i);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
- const GLuint *zValues = (const GLuint *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- GLfloat flt = (GLfloat) ((zValues[i] >> 8) * (1.0 / 0xffffff));
- trb->Store(trb->TexImage, x + i, y, z, &flt);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
- const GLuint *zValues = (const GLuint *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- GLfloat flt = (GLfloat) ((zValues[i] & 0xffffff) * (1.0 / 0xffffff));
- trb->Store(trb->TexImage, x + i, y, z, &flt);
- }
- }
- }
- else {
- _mesa_problem(ctx, "invalid rb->DataType in texture_put_row");
- }
-}
-
-/**
- * Put row of RGB values into a renderbuffer that wraps a texture image.
- */
-static void
-texture_put_row_rgb(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
- GLint x, GLint y, const void *values, const GLubyte *mask)
-{
- const struct texture_renderbuffer *trb
- = (const struct texture_renderbuffer *) rb;
- const GLint z = trb->Zoffset;
- GLuint i;
-
- y += trb->Yoffset;
-
- if (rb->DataType == CHAN_TYPE) {
- const GLchan *rgb = (const GLchan *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x + i, y, z, rgb);
- }
- rgb += 3;
- }
- }
- else if (rb->DataType == GL_UNSIGNED_SHORT) {
- const GLushort *zValues = (const GLushort *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x + i, y, z, zValues + i);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT) {
- const GLuint *zValues = (const GLuint *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x + i, y, z, zValues + i);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
- const GLuint *zValues = (const GLuint *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- GLfloat flt = (GLfloat) ((zValues[i] >> 8) * (1.0 / 0xffffff));
- trb->Store(trb->TexImage, x + i, y, z, &flt);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
- const GLuint *zValues = (const GLuint *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- GLfloat flt = (GLfloat) ((zValues[i] & 0xffffff) * (1.0 / 0xffffff));
- trb->Store(trb->TexImage, x + i, y, z, &flt);
- }
- }
- }
- else {
- _mesa_problem(ctx, "invalid rb->DataType in texture_put_row");
- }
-}
-
-
-static void
-texture_put_mono_row(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
- GLint x, GLint y, const void *value, const GLubyte *mask)
-{
- const struct texture_renderbuffer *trb
- = (const struct texture_renderbuffer *) rb;
- const GLint z = trb->Zoffset;
- GLuint i;
-
- y += trb->Yoffset;
-
- if (rb->DataType == CHAN_TYPE) {
- const GLchan *rgba = (const GLchan *) value;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x + i, y, z, rgba);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_SHORT) {
- const GLushort zValue = *((const GLushort *) value);
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x + i, y, z, &zValue);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT) {
- const GLuint zValue = *((const GLuint *) value);
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x + i, y, z, &zValue);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
- const GLuint zValue = *((const GLuint *) value);
- const GLfloat flt = (GLfloat) ((zValue >> 8) * (1.0 / 0xffffff));
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x + i, y, z, &flt);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
- const GLuint zValue = *((const GLuint *) value);
- const GLfloat flt = (GLfloat) ((zValue & 0xffffff) * (1.0 / 0xffffff));
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x + i, y, z, &flt);
- }
- }
- }
- else {
- _mesa_problem(ctx, "invalid rb->DataType in texture_put_mono_row");
- }
-}
-
-
-static void
-texture_put_values(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
- const GLint x[], const GLint y[], const void *values,
- const GLubyte *mask)
-{
- const struct texture_renderbuffer *trb
- = (const struct texture_renderbuffer *) rb;
- const GLint z = trb->Zoffset;
- GLuint i;
-
- if (rb->DataType == CHAN_TYPE) {
- const GLchan *rgba = (const GLchan *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, rgba);
- }
- rgba += 4;
- }
- }
- else if (rb->DataType == GL_UNSIGNED_SHORT) {
- const GLushort *zValues = (const GLushort *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, zValues + i);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT) {
- const GLuint *zValues = (const GLuint *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, zValues + i);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
- const GLuint *zValues = (const GLuint *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- GLfloat flt = (GLfloat) ((zValues[i] >> 8) * (1.0 / 0xffffff));
- trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
- const GLuint *zValues = (const GLuint *) values;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- GLfloat flt = (GLfloat) ((zValues[i] & 0xffffff) * (1.0 / 0xffffff));
- trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);
- }
- }
- }
- else {
- _mesa_problem(ctx, "invalid rb->DataType in texture_put_values");
- }
-}
-
-
-static void
-texture_put_mono_values(struct gl_context *ctx, struct gl_renderbuffer *rb,
- GLuint count, const GLint x[], const GLint y[],
- const void *value, const GLubyte *mask)
-{
- const struct texture_renderbuffer *trb
- = (const struct texture_renderbuffer *) rb;
- const GLint z = trb->Zoffset;
- GLuint i;
-
- if (rb->DataType == CHAN_TYPE) {
- const GLchan *rgba = (const GLchan *) value;
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, rgba);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT) {
- const GLuint zValue = *((const GLuint *) value);
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &zValue);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_SHORT) {
- const GLushort zValue = *((const GLushort *) value);
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &zValue);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
- const GLuint zValue = *((const GLuint *) value);
- const GLfloat flt = (GLfloat) ((zValue >> 8) * (1.0 / 0xffffff));
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);
- }
- }
- }
- else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
- const GLuint zValue = *((const GLuint *) value);
- const GLfloat flt = (GLfloat) ((zValue & 0xffffff) * (1.0 / 0xffffff));
- for (i = 0; i < count; i++) {
- if (!mask || mask[i]) {
- trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);
- }
- }
- }
- else {
- _mesa_problem(ctx, "invalid rb->DataType in texture_put_mono_values");
- }
-}
-
-
-static void
-store_nop(struct gl_texture_image *texImage,
- GLint col, GLint row, GLint img,
- const void *texel)
-{
-}
-
-
-static void
-delete_texture_wrapper(struct gl_renderbuffer *rb)
-{
- ASSERT(rb->RefCount == 0);
- free(rb);
-}
-
-
-/**
- * This function creates a renderbuffer object which wraps a texture image.
- * The new renderbuffer is plugged into the given attachment point.
- * This allows rendering into the texture as if it were a renderbuffer.
- */
-static void
-wrap_texture(struct gl_context *ctx, struct gl_renderbuffer_attachment *att)
-{
- struct texture_renderbuffer *trb;
- const GLuint name = 0;
-
- ASSERT(att->Type == GL_TEXTURE);
- ASSERT(att->Renderbuffer == NULL);
-
- trb = CALLOC_STRUCT(texture_renderbuffer);
- if (!trb) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "wrap_texture");
- return;
- }
-
- /* init base gl_renderbuffer fields */
- _mesa_init_renderbuffer(&trb->Base, name);
- /* plug in our texture_renderbuffer-specific functions */
- trb->Base.Delete = delete_texture_wrapper;
- trb->Base.AllocStorage = NULL; /* illegal! */
- trb->Base.GetRow = texture_get_row;
- trb->Base.GetValues = texture_get_values;
- trb->Base.PutRow = texture_put_row;
- trb->Base.PutRowRGB = texture_put_row_rgb;
- trb->Base.PutMonoRow = texture_put_mono_row;
- trb->Base.PutValues = texture_put_values;
- trb->Base.PutMonoValues = texture_put_mono_values;
-
- /* update attachment point */
- _mesa_reference_renderbuffer(&att->Renderbuffer, &(trb->Base));
-}
-
-/**
- * Update the renderbuffer wrapper for rendering to a texture.
- * For example, update the width, height of the RB based on the texture size,
- * update the internal format info, etc.
- */
-static void
-update_wrapper(struct gl_context *ctx, struct gl_renderbuffer_attachment *att)
-{
- struct texture_renderbuffer *trb
- = (struct texture_renderbuffer *) att->Renderbuffer;
-
- (void) ctx;
- ASSERT(trb);
-
- trb->TexImage = _mesa_get_attachment_teximage(att);
- ASSERT(trb->TexImage);
-
- trb->Store = _mesa_get_texel_store_func(trb->TexImage->TexFormat);
- if (!trb->Store) {
- /* we'll never draw into some textures (compressed formats) */
- trb->Store = store_nop;
- }
-
- trb->Fetchf = trb->TexImage->FetchTexelf;
-
- if (att->Texture->Target == GL_TEXTURE_1D_ARRAY_EXT) {
- trb->Yoffset = att->Zoffset;
- trb->Zoffset = 0;
- }
- else {
- trb->Yoffset = 0;
- trb->Zoffset = att->Zoffset;
- }
-
- trb->Base.Width = trb->TexImage->Width;
- trb->Base.Height = trb->TexImage->Height;
- trb->Base.InternalFormat = trb->TexImage->InternalFormat;
- trb->Base.Format = trb->TexImage->TexFormat;
-
- /* XXX may need more special cases here */
- switch (trb->TexImage->TexFormat) {
- case MESA_FORMAT_Z24_S8:
- trb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
- trb->Base._BaseFormat = GL_DEPTH_STENCIL;
- break;
- case MESA_FORMAT_S8_Z24:
- trb->Base.DataType = GL_UNSIGNED_INT_8_24_REV_MESA;
- trb->Base._BaseFormat = GL_DEPTH_STENCIL;
- break;
- case MESA_FORMAT_Z24_X8:
- trb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
- trb->Base._BaseFormat = GL_DEPTH_COMPONENT;
- break;
- case MESA_FORMAT_X8_Z24:
- trb->Base.DataType = GL_UNSIGNED_INT_8_24_REV_MESA;
- trb->Base._BaseFormat = GL_DEPTH_COMPONENT;
- break;
- case MESA_FORMAT_Z16:
- trb->Base.DataType = GL_UNSIGNED_SHORT;
- trb->Base._BaseFormat = GL_DEPTH_COMPONENT;
- break;
- case MESA_FORMAT_Z32:
- trb->Base.DataType = GL_UNSIGNED_INT;
- trb->Base._BaseFormat = GL_DEPTH_COMPONENT;
- break;
- /* SRGB formats pre EXT_framebuffer_sRGB don't do sRGB translations on FBO readback */
- case MESA_FORMAT_SRGB8:
- trb->Fetchf = _mesa_get_texel_fetch_func(MESA_FORMAT_RGB888, _mesa_get_texture_dimensions(att->Texture->Target));
- trb->Base.DataType = CHAN_TYPE;
- trb->Base._BaseFormat = GL_RGBA;
- break;
- case MESA_FORMAT_SRGBA8:
- trb->Fetchf = _mesa_get_texel_fetch_func(MESA_FORMAT_RGBA8888, _mesa_get_texture_dimensions(att->Texture->Target));
- trb->Base.DataType = CHAN_TYPE;
- trb->Base._BaseFormat = GL_RGBA;
- break;
- case MESA_FORMAT_SARGB8:
- trb->Fetchf = _mesa_get_texel_fetch_func(MESA_FORMAT_ARGB8888, _mesa_get_texture_dimensions(att->Texture->Target));
- trb->Base.DataType = CHAN_TYPE;
- trb->Base._BaseFormat = GL_RGBA;
- break;
- default:
- trb->Base.DataType = CHAN_TYPE;
- trb->Base._BaseFormat = GL_RGBA;
- }
- trb->Base.Data = trb->TexImage->Data;
-}
-
-
-
-/**
- * Called when rendering to a texture image begins, or when changing
- * the dest mipmap level, cube face, etc.
- * This is a fallback routine for software render-to-texture.
- *
- * Called via the glRenderbufferTexture1D/2D/3D() functions
- * and elsewhere (such as glTexImage2D).
- *
- * The image we're rendering into is
- * att->Texture->Image[att->CubeMapFace][att->TextureLevel];
- * It'll never be NULL.
- *
- * \param fb the framebuffer object the texture is being bound to
- * \param att the fb attachment point of the texture
- *
- * \sa _mesa_framebuffer_renderbuffer
- */
-void
-_swrast_render_texture(struct gl_context *ctx,
- struct gl_framebuffer *fb,
- struct gl_renderbuffer_attachment *att)
-{
- (void) fb;
-
- if (!att->Renderbuffer) {
- wrap_texture(ctx, att);
- }
- update_wrapper(ctx, att);
-}
-
-
-void
-_swrast_finish_render_texture(struct gl_context *ctx,
- struct gl_renderbuffer_attachment *att)
-{
- /* do nothing */
- /* The renderbuffer texture wrapper will get deleted by the
- * normal mechanism for deleting renderbuffers.
- */
- (void) ctx;
- (void) att;
-}
+
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/fbobject.h"
+#include "main/macros.h"
+#include "main/texfetch.h"
+#include "main/teximage.h"
+#include "main/renderbuffer.h"
+#include "swrast/swrast.h"
+
+
+/*
+ * Render-to-texture code for GL_EXT_framebuffer_object
+ */
+
+
+/**
+ * Derived from gl_renderbuffer class
+ */
+struct texture_renderbuffer
+{
+ struct gl_renderbuffer Base; /**< Base class object */
+ struct gl_texture_image *TexImage;
+ StoreTexelFunc Store;
+ FetchTexelFuncF Fetchf;
+ GLint Yoffset; /**< Layer for 1D array textures. */
+ GLint Zoffset; /**< Layer for 2D array textures, or slice
+ * for 3D textures
+ */
+};
+
+
+/**
+ * Get row of values from the renderbuffer that wraps a texture image.
+ */
+static void
+texture_get_row(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, void *values)
+{
+ const struct texture_renderbuffer *trb
+ = (const struct texture_renderbuffer *) rb;
+ const GLint z = trb->Zoffset;
+ GLuint i;
+
+ ASSERT(trb->TexImage->Width == rb->Width);
+ ASSERT(trb->TexImage->Height == rb->Height);
+
+ y += trb->Yoffset;
+
+ if (rb->DataType == CHAN_TYPE) {
+ GLchan *rgbaOut = (GLchan *) values;
+ for (i = 0; i < count; i++) {
+ GLfloat rgba[4];
+ trb->Fetchf(trb->TexImage, x + i, y, z, rgba);
+ UNCLAMPED_FLOAT_TO_RGBA_CHAN(rgbaOut + 4 * i, rgba);
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ GLushort *zValues = (GLushort *) values;
+ for (i = 0; i < count; i++) {
+ GLfloat flt;
+ trb->Fetchf(trb->TexImage, x + i, y, z, &flt);
+ zValues[i] = (GLushort) (flt * 0xffff);
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT) {
+ GLuint *zValues = (GLuint *) values;
+ /*
+ const GLdouble scale = (GLdouble) 0xffffffff;
+ */
+ for (i = 0; i < count; i++) {
+ GLfloat flt;
+ trb->Fetchf(trb->TexImage, x + i, y, z, &flt);
+#if 0
+ /* this should work, but doesn't (overflow due to low precision) */
+ zValues[i] = (GLuint) (flt * scale);
+#else
+ /* temporary hack */
+ zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;
+#endif
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
+ GLuint *zValues = (GLuint *) values;
+ for (i = 0; i < count; i++) {
+ GLfloat flt;
+ trb->Fetchf(trb->TexImage, x + i, y, z, &flt);
+ zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
+ GLuint *zValues = (GLuint *) values;
+ for (i = 0; i < count; i++) {
+ GLfloat flt;
+ trb->Fetchf(trb->TexImage, x + i, y, z, &flt);
+ zValues[i] = (GLuint) (flt * 0xffffff);
+ }
+ }
+ else {
+ _mesa_problem(ctx, "invalid rb->DataType in texture_get_row");
+ }
+}
+
+
+static void
+texture_get_values(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], void *values)
+{
+ const struct texture_renderbuffer *trb
+ = (const struct texture_renderbuffer *) rb;
+ const GLint z = trb->Zoffset;
+ GLuint i;
+
+ if (rb->DataType == CHAN_TYPE) {
+ GLchan *rgbaOut = (GLchan *) values;
+ for (i = 0; i < count; i++) {
+ GLfloat rgba[4];
+ trb->Fetchf(trb->TexImage, x[i], y[i] + trb->Yoffset,
+ z, rgba);
+ UNCLAMPED_FLOAT_TO_RGBA_CHAN(rgbaOut + 4 * i, rgba);
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ GLushort *zValues = (GLushort *) values;
+ for (i = 0; i < count; i++) {
+ GLfloat flt;
+ trb->Fetchf(trb->TexImage, x[i], y[i] + trb->Yoffset,
+ z, &flt);
+ zValues[i] = (GLushort) (flt * 0xffff);
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT) {
+ GLuint *zValues = (GLuint *) values;
+ for (i = 0; i < count; i++) {
+ GLfloat flt;
+ trb->Fetchf(trb->TexImage, x[i], y[i] + trb->Yoffset,
+ z, &flt);
+#if 0
+ zValues[i] = (GLuint) (flt * 0xffffffff);
+#else
+ zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;
+#endif
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
+ GLuint *zValues = (GLuint *) values;
+ for (i = 0; i < count; i++) {
+ GLfloat flt;
+ trb->Fetchf(trb->TexImage, x[i], y[i] + trb->Yoffset,
+ z, &flt);
+ zValues[i] = ((GLuint) (flt * 0xffffff)) << 8;
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
+ GLuint *zValues = (GLuint *) values;
+ for (i = 0; i < count; i++) {
+ GLfloat flt;
+ trb->Fetchf(trb->TexImage, x[i], y[i] + trb->Yoffset,
+ z, &flt);
+ zValues[i] = (GLuint) (flt * 0xffffff);
+ }
+ }
+ else {
+ _mesa_problem(ctx, "invalid rb->DataType in texture_get_values");
+ }
+}
+
+
+/**
+ * Put row of values into a renderbuffer that wraps a texture image.
+ */
+static void
+texture_put_row(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ const struct texture_renderbuffer *trb
+ = (const struct texture_renderbuffer *) rb;
+ const GLint z = trb->Zoffset;
+ GLuint i;
+
+ y += trb->Yoffset;
+
+ if (rb->DataType == CHAN_TYPE) {
+ const GLchan *rgba = (const GLchan *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x + i, y, z, rgba);
+ }
+ rgba += 4;
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLushort *zValues = (const GLushort *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x + i, y, z, zValues + i);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT) {
+ const GLuint *zValues = (const GLuint *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x + i, y, z, zValues + i);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
+ const GLuint *zValues = (const GLuint *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLfloat flt = (GLfloat) ((zValues[i] >> 8) * (1.0 / 0xffffff));
+ trb->Store(trb->TexImage, x + i, y, z, &flt);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
+ const GLuint *zValues = (const GLuint *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLfloat flt = (GLfloat) ((zValues[i] & 0xffffff) * (1.0 / 0xffffff));
+ trb->Store(trb->TexImage, x + i, y, z, &flt);
+ }
+ }
+ }
+ else {
+ _mesa_problem(ctx, "invalid rb->DataType in texture_put_row");
+ }
+}
+
+/**
+ * Put row of RGB values into a renderbuffer that wraps a texture image.
+ */
+static void
+texture_put_row_rgb(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *values, const GLubyte *mask)
+{
+ const struct texture_renderbuffer *trb
+ = (const struct texture_renderbuffer *) rb;
+ const GLint z = trb->Zoffset;
+ GLuint i;
+
+ y += trb->Yoffset;
+
+ if (rb->DataType == CHAN_TYPE) {
+ const GLchan *rgb = (const GLchan *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x + i, y, z, rgb);
+ }
+ rgb += 3;
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLushort *zValues = (const GLushort *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x + i, y, z, zValues + i);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT) {
+ const GLuint *zValues = (const GLuint *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x + i, y, z, zValues + i);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
+ const GLuint *zValues = (const GLuint *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLfloat flt = (GLfloat) ((zValues[i] >> 8) * (1.0 / 0xffffff));
+ trb->Store(trb->TexImage, x + i, y, z, &flt);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
+ const GLuint *zValues = (const GLuint *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLfloat flt = (GLfloat) ((zValues[i] & 0xffffff) * (1.0 / 0xffffff));
+ trb->Store(trb->TexImage, x + i, y, z, &flt);
+ }
+ }
+ }
+ else {
+ _mesa_problem(ctx, "invalid rb->DataType in texture_put_row");
+ }
+}
+
+
+static void
+texture_put_mono_row(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ GLint x, GLint y, const void *value, const GLubyte *mask)
+{
+ const struct texture_renderbuffer *trb
+ = (const struct texture_renderbuffer *) rb;
+ const GLint z = trb->Zoffset;
+ GLuint i;
+
+ y += trb->Yoffset;
+
+ if (rb->DataType == CHAN_TYPE) {
+ const GLchan *rgba = (const GLchan *) value;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x + i, y, z, rgba);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLushort zValue = *((const GLushort *) value);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x + i, y, z, &zValue);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT) {
+ const GLuint zValue = *((const GLuint *) value);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x + i, y, z, &zValue);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
+ const GLuint zValue = *((const GLuint *) value);
+ const GLfloat flt = (GLfloat) ((zValue >> 8) * (1.0 / 0xffffff));
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x + i, y, z, &flt);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
+ const GLuint zValue = *((const GLuint *) value);
+ const GLfloat flt = (GLfloat) ((zValue & 0xffffff) * (1.0 / 0xffffff));
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x + i, y, z, &flt);
+ }
+ }
+ }
+ else {
+ _mesa_problem(ctx, "invalid rb->DataType in texture_put_mono_row");
+ }
+}
+
+
+static void
+texture_put_values(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
+ const GLint x[], const GLint y[], const void *values,
+ const GLubyte *mask)
+{
+ const struct texture_renderbuffer *trb
+ = (const struct texture_renderbuffer *) rb;
+ const GLint z = trb->Zoffset;
+ GLuint i;
+
+ if (rb->DataType == CHAN_TYPE) {
+ const GLchan *rgba = (const GLchan *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, rgba);
+ }
+ rgba += 4;
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLushort *zValues = (const GLushort *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, zValues + i);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT) {
+ const GLuint *zValues = (const GLuint *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, zValues + i);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
+ const GLuint *zValues = (const GLuint *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLfloat flt = (GLfloat) ((zValues[i] >> 8) * (1.0 / 0xffffff));
+ trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
+ const GLuint *zValues = (const GLuint *) values;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ GLfloat flt = (GLfloat) ((zValues[i] & 0xffffff) * (1.0 / 0xffffff));
+ trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);
+ }
+ }
+ }
+ else {
+ _mesa_problem(ctx, "invalid rb->DataType in texture_put_values");
+ }
+}
+
+
+static void
+texture_put_mono_values(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ const void *value, const GLubyte *mask)
+{
+ const struct texture_renderbuffer *trb
+ = (const struct texture_renderbuffer *) rb;
+ const GLint z = trb->Zoffset;
+ GLuint i;
+
+ if (rb->DataType == CHAN_TYPE) {
+ const GLchan *rgba = (const GLchan *) value;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, rgba);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT) {
+ const GLuint zValue = *((const GLuint *) value);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &zValue);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_SHORT) {
+ const GLushort zValue = *((const GLushort *) value);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &zValue);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_24_8_EXT) {
+ const GLuint zValue = *((const GLuint *) value);
+ const GLfloat flt = (GLfloat) ((zValue >> 8) * (1.0 / 0xffffff));
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);
+ }
+ }
+ }
+ else if (rb->DataType == GL_UNSIGNED_INT_8_24_REV_MESA) {
+ const GLuint zValue = *((const GLuint *) value);
+ const GLfloat flt = (GLfloat) ((zValue & 0xffffff) * (1.0 / 0xffffff));
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ trb->Store(trb->TexImage, x[i], y[i] + trb->Yoffset, z, &flt);
+ }
+ }
+ }
+ else {
+ _mesa_problem(ctx, "invalid rb->DataType in texture_put_mono_values");
+ }
+}
+
+
+static void
+store_nop(struct gl_texture_image *texImage,
+ GLint col, GLint row, GLint img,
+ const void *texel)
+{
+}
+
+
+static void
+delete_texture_wrapper(struct gl_renderbuffer *rb)
+{
+ ASSERT(rb->RefCount == 0);
+ free(rb);
+}
+
+
+/**
+ * This function creates a renderbuffer object which wraps a texture image.
+ * The new renderbuffer is plugged into the given attachment point.
+ * This allows rendering into the texture as if it were a renderbuffer.
+ */
+static void
+wrap_texture(struct gl_context *ctx, struct gl_renderbuffer_attachment *att)
+{
+ struct texture_renderbuffer *trb;
+ const GLuint name = 0;
+
+ ASSERT(att->Type == GL_TEXTURE);
+ ASSERT(att->Renderbuffer == NULL);
+
+ trb = CALLOC_STRUCT(texture_renderbuffer);
+ if (!trb) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "wrap_texture");
+ return;
+ }
+
+ /* init base gl_renderbuffer fields */
+ _mesa_init_renderbuffer(&trb->Base, name);
+ /* plug in our texture_renderbuffer-specific functions */
+ trb->Base.Delete = delete_texture_wrapper;
+ trb->Base.AllocStorage = NULL; /* illegal! */
+ trb->Base.GetRow = texture_get_row;
+ trb->Base.GetValues = texture_get_values;
+ trb->Base.PutRow = texture_put_row;
+ trb->Base.PutRowRGB = texture_put_row_rgb;
+ trb->Base.PutMonoRow = texture_put_mono_row;
+ trb->Base.PutValues = texture_put_values;
+ trb->Base.PutMonoValues = texture_put_mono_values;
+
+ /* update attachment point */
+ _mesa_reference_renderbuffer(&att->Renderbuffer, &(trb->Base));
+}
+
+/**
+ * Update the renderbuffer wrapper for rendering to a texture.
+ * For example, update the width, height of the RB based on the texture size,
+ * update the internal format info, etc.
+ */
+static void
+update_wrapper(struct gl_context *ctx, struct gl_renderbuffer_attachment *att)
+{
+ struct texture_renderbuffer *trb
+ = (struct texture_renderbuffer *) att->Renderbuffer;
+
+ (void) ctx;
+ ASSERT(trb);
+
+ trb->TexImage = _mesa_get_attachment_teximage(att);
+ ASSERT(trb->TexImage);
+
+ trb->Store = _mesa_get_texel_store_func(trb->TexImage->TexFormat);
+ if (!trb->Store) {
+ /* we'll never draw into some textures (compressed formats) */
+ trb->Store = store_nop;
+ }
+
+ trb->Fetchf = trb->TexImage->FetchTexelf;
+
+ if (att->Texture->Target == GL_TEXTURE_1D_ARRAY_EXT) {
+ trb->Yoffset = att->Zoffset;
+ trb->Zoffset = 0;
+ }
+ else {
+ trb->Yoffset = 0;
+ trb->Zoffset = att->Zoffset;
+ }
+
+ trb->Base.Width = trb->TexImage->Width;
+ trb->Base.Height = trb->TexImage->Height;
+ trb->Base.InternalFormat = trb->TexImage->InternalFormat;
+ trb->Base.Format = trb->TexImage->TexFormat;
+
+ /* XXX may need more special cases here */
+ switch (trb->TexImage->TexFormat) {
+ case MESA_FORMAT_Z24_S8:
+ trb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
+ trb->Base._BaseFormat = GL_DEPTH_STENCIL;
+ break;
+ case MESA_FORMAT_S8_Z24:
+ trb->Base.DataType = GL_UNSIGNED_INT_8_24_REV_MESA;
+ trb->Base._BaseFormat = GL_DEPTH_STENCIL;
+ break;
+ case MESA_FORMAT_Z24_X8:
+ trb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
+ trb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+ break;
+ case MESA_FORMAT_X8_Z24:
+ trb->Base.DataType = GL_UNSIGNED_INT_8_24_REV_MESA;
+ trb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+ break;
+ case MESA_FORMAT_Z16:
+ trb->Base.DataType = GL_UNSIGNED_SHORT;
+ trb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+ break;
+ case MESA_FORMAT_Z32:
+ trb->Base.DataType = GL_UNSIGNED_INT;
+ trb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+ break;
+ /* SRGB formats pre EXT_framebuffer_sRGB don't do sRGB translations on FBO readback */
+ case MESA_FORMAT_SRGB8:
+ trb->Fetchf = _mesa_get_texel_fetch_func(MESA_FORMAT_RGB888, _mesa_get_texture_dimensions(att->Texture->Target));
+ trb->Base.DataType = CHAN_TYPE;
+ trb->Base._BaseFormat = GL_RGBA;
+ break;
+ case MESA_FORMAT_SRGBA8:
+ trb->Fetchf = _mesa_get_texel_fetch_func(MESA_FORMAT_RGBA8888, _mesa_get_texture_dimensions(att->Texture->Target));
+ trb->Base.DataType = CHAN_TYPE;
+ trb->Base._BaseFormat = GL_RGBA;
+ break;
+ case MESA_FORMAT_SARGB8:
+ trb->Fetchf = _mesa_get_texel_fetch_func(MESA_FORMAT_ARGB8888, _mesa_get_texture_dimensions(att->Texture->Target));
+ trb->Base.DataType = CHAN_TYPE;
+ trb->Base._BaseFormat = GL_RGBA;
+ break;
+ default:
+ trb->Base.DataType = CHAN_TYPE;
+ trb->Base._BaseFormat = GL_RGBA;
+ }
+ trb->Base.Data = trb->TexImage->Data;
+}
+
+
+
+/**
+ * Called when rendering to a texture image begins, or when changing
+ * the dest mipmap level, cube face, etc.
+ * This is a fallback routine for software render-to-texture.
+ *
+ * Called via the glRenderbufferTexture1D/2D/3D() functions
+ * and elsewhere (such as glTexImage2D).
+ *
+ * The image we're rendering into is
+ * att->Texture->Image[att->CubeMapFace][att->TextureLevel];
+ * It'll never be NULL.
+ *
+ * \param fb the framebuffer object the texture is being bound to
+ * \param att the fb attachment point of the texture
+ *
+ * \sa _mesa_framebuffer_renderbuffer
+ */
+void
+_swrast_render_texture(struct gl_context *ctx,
+ struct gl_framebuffer *fb,
+ struct gl_renderbuffer_attachment *att)
+{
+ (void) fb;
+
+ if (!att->Renderbuffer) {
+ wrap_texture(ctx, att);
+ }
+ update_wrapper(ctx, att);
+}
+
+
+void
+_swrast_finish_render_texture(struct gl_context *ctx,
+ struct gl_renderbuffer_attachment *att)
+{
+ /* do nothing */
+ /* The renderbuffer texture wrapper will get deleted by the
+ * normal mechanism for deleting renderbuffers.
+ */
+ (void) ctx;
+ (void) att;
+}
diff --git a/mesalib/src/mesa/swrast/s_triangle.c b/mesalib/src/mesa/swrast/s_triangle.c
index 0f21a33f9..8a9671aa0 100644
--- a/mesalib/src/mesa/swrast/s_triangle.c
+++ b/mesalib/src/mesa/swrast/s_triangle.c
@@ -1,1143 +1,1143 @@
-/*
- * Mesa 3-D graphics library
- * Version: 7.3
- *
- * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-/*
- * When the device driver doesn't implement triangle rasterization it
- * can hook in _swrast_Triangle, which eventually calls one of these
- * functions to draw triangles.
- */
-
-#include "main/glheader.h"
-#include "main/context.h"
-#include "main/colormac.h"
-#include "main/imports.h"
-#include "main/macros.h"
-#include "main/mtypes.h"
-#include "main/state.h"
-#include "program/prog_instruction.h"
-
-#include "s_aatriangle.h"
-#include "s_context.h"
-#include "s_feedback.h"
-#include "s_span.h"
-#include "s_triangle.h"
-
-
-/**
- * Test if a triangle should be culled. Used for feedback and selection mode.
- * \return GL_TRUE if the triangle is to be culled, GL_FALSE otherwise.
- */
-GLboolean
-_swrast_culltriangle( struct gl_context *ctx,
- const SWvertex *v0,
- const SWvertex *v1,
- const SWvertex *v2 )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLfloat ex = v1->attrib[FRAG_ATTRIB_WPOS][0] - v0->attrib[FRAG_ATTRIB_WPOS][0];
- GLfloat ey = v1->attrib[FRAG_ATTRIB_WPOS][1] - v0->attrib[FRAG_ATTRIB_WPOS][1];
- GLfloat fx = v2->attrib[FRAG_ATTRIB_WPOS][0] - v0->attrib[FRAG_ATTRIB_WPOS][0];
- GLfloat fy = v2->attrib[FRAG_ATTRIB_WPOS][1] - v0->attrib[FRAG_ATTRIB_WPOS][1];
- GLfloat c = ex*fy-ey*fx;
-
- if (c * swrast->_BackfaceSign * swrast->_BackfaceCullSign <= 0.0F)
- return GL_FALSE;
-
- return GL_TRUE;
-}
-
-
-
-/*
- * Render a flat-shaded RGBA triangle.
- */
-#define NAME flat_rgba_triangle
-#define INTERP_Z 1
-#define SETUP_CODE \
- ASSERT(ctx->Texture._EnabledCoordUnits == 0);\
- ASSERT(ctx->Light.ShadeModel==GL_FLAT); \
- span.interpMask |= SPAN_RGBA; \
- span.red = ChanToFixed(v2->color[0]); \
- span.green = ChanToFixed(v2->color[1]); \
- span.blue = ChanToFixed(v2->color[2]); \
- span.alpha = ChanToFixed(v2->color[3]); \
- span.redStep = 0; \
- span.greenStep = 0; \
- span.blueStep = 0; \
- span.alphaStep = 0;
-#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span);
-#include "s_tritemp.h"
-
-
-
-/*
- * Render a smooth-shaded RGBA triangle.
- */
-#define NAME smooth_rgba_triangle
-#define INTERP_Z 1
-#define INTERP_RGB 1
-#define INTERP_ALPHA 1
-#define SETUP_CODE \
- { \
- /* texturing must be off */ \
- ASSERT(ctx->Texture._EnabledCoordUnits == 0); \
- ASSERT(ctx->Light.ShadeModel==GL_SMOOTH); \
- }
-#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span);
-#include "s_tritemp.h"
-
-
-
-/*
- * Render an RGB, GL_DECAL, textured triangle.
- * Interpolate S,T only w/out mipmapping or perspective correction.
- *
- * No fog. No depth testing.
- */
-#define NAME simple_textured_triangle
-#define INTERP_INT_TEX 1
-#define S_SCALE twidth
-#define T_SCALE theight
-
-#define SETUP_CODE \
- struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; \
- const struct gl_texture_object *obj = \
- ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \
- const struct gl_texture_image *texImg = \
- obj->Image[0][obj->BaseLevel]; \
- const GLfloat twidth = (GLfloat) texImg->Width; \
- const GLfloat theight = (GLfloat) texImg->Height; \
- const GLint twidth_log2 = texImg->WidthLog2; \
- const GLubyte *texture = (const GLubyte *) texImg->Data; \
- const GLint smask = texImg->Width - 1; \
- const GLint tmask = texImg->Height - 1; \
- ASSERT(texImg->TexFormat == MESA_FORMAT_RGB888); \
- if (!rb || !texture) { \
- return; \
- }
-
-#define RENDER_SPAN( span ) \
- GLuint i; \
- GLubyte rgb[MAX_WIDTH][3]; \
- span.intTex[0] -= FIXED_HALF; /* off-by-one error? */ \
- span.intTex[1] -= FIXED_HALF; \
- for (i = 0; i < span.end; i++) { \
- GLint s = FixedToInt(span.intTex[0]) & smask; \
- GLint t = FixedToInt(span.intTex[1]) & tmask; \
- GLint pos = (t << twidth_log2) + s; \
- pos = pos + pos + pos; /* multiply by 3 */ \
- rgb[i][RCOMP] = texture[pos+2]; \
- rgb[i][GCOMP] = texture[pos+1]; \
- rgb[i][BCOMP] = texture[pos+0]; \
- span.intTex[0] += span.intTexStep[0]; \
- span.intTex[1] += span.intTexStep[1]; \
- } \
- rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, rgb, NULL);
-
-#include "s_tritemp.h"
-
-
-
-/*
- * Render an RGB, GL_DECAL, textured triangle.
- * Interpolate S,T, GL_LESS depth test, w/out mipmapping or
- * perspective correction.
- * Depth buffer bits must be <= sizeof(DEFAULT_SOFTWARE_DEPTH_TYPE)
- *
- * No fog.
- */
-#define NAME simple_z_textured_triangle
-#define INTERP_Z 1
-#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
-#define INTERP_INT_TEX 1
-#define S_SCALE twidth
-#define T_SCALE theight
-
-#define SETUP_CODE \
- struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; \
- const struct gl_texture_object *obj = \
- ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \
- const struct gl_texture_image *texImg = \
- obj->Image[0][obj->BaseLevel]; \
- const GLfloat twidth = (GLfloat) texImg->Width; \
- const GLfloat theight = (GLfloat) texImg->Height; \
- const GLint twidth_log2 = texImg->WidthLog2; \
- const GLubyte *texture = (const GLubyte *) texImg->Data; \
- const GLint smask = texImg->Width - 1; \
- const GLint tmask = texImg->Height - 1; \
- ASSERT(texImg->TexFormat == MESA_FORMAT_RGB888); \
- if (!rb || !texture) { \
- return; \
- }
-
-#define RENDER_SPAN( span ) \
- GLuint i; \
- GLubyte rgb[MAX_WIDTH][3]; \
- span.intTex[0] -= FIXED_HALF; /* off-by-one error? */ \
- span.intTex[1] -= FIXED_HALF; \
- for (i = 0; i < span.end; i++) { \
- const GLuint z = FixedToDepth(span.z); \
- if (z < zRow[i]) { \
- GLint s = FixedToInt(span.intTex[0]) & smask; \
- GLint t = FixedToInt(span.intTex[1]) & tmask; \
- GLint pos = (t << twidth_log2) + s; \
- pos = pos + pos + pos; /* multiply by 3 */ \
- rgb[i][RCOMP] = texture[pos+2]; \
- rgb[i][GCOMP] = texture[pos+1]; \
- rgb[i][BCOMP] = texture[pos+0]; \
- zRow[i] = z; \
- span.array->mask[i] = 1; \
- } \
- else { \
- span.array->mask[i] = 0; \
- } \
- span.intTex[0] += span.intTexStep[0]; \
- span.intTex[1] += span.intTexStep[1]; \
- span.z += span.zStep; \
- } \
- rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, rgb, span.array->mask);
-
-#include "s_tritemp.h"
-
-
-#if CHAN_TYPE != GL_FLOAT
-
-struct affine_info
-{
- GLenum filter;
- GLenum format;
- GLenum envmode;
- GLint smask, tmask;
- GLint twidth_log2;
- const GLchan *texture;
- GLfixed er, eg, eb, ea;
- GLint tbytesline, tsize;
-};
-
-
-static INLINE GLint
-ilerp(GLint t, GLint a, GLint b)
-{
- return a + ((t * (b - a)) >> FIXED_SHIFT);
-}
-
-static INLINE GLint
-ilerp_2d(GLint ia, GLint ib, GLint v00, GLint v10, GLint v01, GLint v11)
-{
- const GLint temp0 = ilerp(ia, v00, v10);
- const GLint temp1 = ilerp(ia, v01, v11);
- return ilerp(ib, temp0, temp1);
-}
-
-
-/* This function can handle GL_NEAREST or GL_LINEAR sampling of 2D RGB or RGBA
- * textures with GL_REPLACE, GL_MODULATE, GL_BLEND, GL_DECAL or GL_ADD
- * texture env modes.
- */
-static INLINE void
-affine_span(struct gl_context *ctx, SWspan *span,
- struct affine_info *info)
-{
- GLchan sample[4]; /* the filtered texture sample */
- const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits;
-
- /* Instead of defining a function for each mode, a test is done
- * between the outer and inner loops. This is to reduce code size
- * and complexity. Observe that an optimizing compiler kills
- * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST).
- */
-
-#define NEAREST_RGB \
- sample[RCOMP] = tex00[2]; \
- sample[GCOMP] = tex00[1]; \
- sample[BCOMP] = tex00[0]; \
- sample[ACOMP] = CHAN_MAX;
-
-#define LINEAR_RGB \
- sample[RCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\
- sample[GCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\
- sample[BCOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0]);\
- sample[ACOMP] = CHAN_MAX;
-
-#define NEAREST_RGBA \
- sample[RCOMP] = tex00[3]; \
- sample[GCOMP] = tex00[2]; \
- sample[BCOMP] = tex00[1]; \
- sample[ACOMP] = tex00[0];
-
-#define LINEAR_RGBA \
- sample[RCOMP] = ilerp_2d(sf, tf, tex00[3], tex01[3], tex10[3], tex11[3]);\
- sample[GCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\
- sample[BCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\
- sample[ACOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0])
-
-#define MODULATE \
- dest[RCOMP] = span->red * (sample[RCOMP] + 1u) >> (FIXED_SHIFT + 8); \
- dest[GCOMP] = span->green * (sample[GCOMP] + 1u) >> (FIXED_SHIFT + 8); \
- dest[BCOMP] = span->blue * (sample[BCOMP] + 1u) >> (FIXED_SHIFT + 8); \
- dest[ACOMP] = span->alpha * (sample[ACOMP] + 1u) >> (FIXED_SHIFT + 8)
-
-#define DECAL \
- dest[RCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->red + \
- ((sample[ACOMP] + 1) * sample[RCOMP] << FIXED_SHIFT)) \
- >> (FIXED_SHIFT + 8); \
- dest[GCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->green + \
- ((sample[ACOMP] + 1) * sample[GCOMP] << FIXED_SHIFT)) \
- >> (FIXED_SHIFT + 8); \
- dest[BCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->blue + \
- ((sample[ACOMP] + 1) * sample[BCOMP] << FIXED_SHIFT)) \
- >> (FIXED_SHIFT + 8); \
- dest[ACOMP] = FixedToInt(span->alpha)
-
-#define BLEND \
- dest[RCOMP] = ((CHAN_MAX - sample[RCOMP]) * span->red \
- + (sample[RCOMP] + 1) * info->er) >> (FIXED_SHIFT + 8); \
- dest[GCOMP] = ((CHAN_MAX - sample[GCOMP]) * span->green \
- + (sample[GCOMP] + 1) * info->eg) >> (FIXED_SHIFT + 8); \
- dest[BCOMP] = ((CHAN_MAX - sample[BCOMP]) * span->blue \
- + (sample[BCOMP] + 1) * info->eb) >> (FIXED_SHIFT + 8); \
- dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8)
-
-#define REPLACE COPY_CHAN4(dest, sample)
-
-#define ADD \
- { \
- GLint rSum = FixedToInt(span->red) + (GLint) sample[RCOMP]; \
- GLint gSum = FixedToInt(span->green) + (GLint) sample[GCOMP]; \
- GLint bSum = FixedToInt(span->blue) + (GLint) sample[BCOMP]; \
- dest[RCOMP] = MIN2(rSum, CHAN_MAX); \
- dest[GCOMP] = MIN2(gSum, CHAN_MAX); \
- dest[BCOMP] = MIN2(bSum, CHAN_MAX); \
- dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8); \
- }
-
-/* shortcuts */
-
-#define NEAREST_RGB_REPLACE \
- NEAREST_RGB; \
- dest[0] = sample[0]; \
- dest[1] = sample[1]; \
- dest[2] = sample[2]; \
- dest[3] = FixedToInt(span->alpha);
-
-#define NEAREST_RGBA_REPLACE \
- dest[RCOMP] = tex00[3]; \
- dest[GCOMP] = tex00[2]; \
- dest[BCOMP] = tex00[1]; \
- dest[ACOMP] = tex00[0]
-
-#define SPAN_NEAREST(DO_TEX, COMPS) \
- for (i = 0; i < span->end; i++) { \
- /* Isn't it necessary to use FixedFloor below?? */ \
- GLint s = FixedToInt(span->intTex[0]) & info->smask; \
- GLint t = FixedToInt(span->intTex[1]) & info->tmask; \
- GLint pos = (t << info->twidth_log2) + s; \
- const GLchan *tex00 = info->texture + COMPS * pos; \
- DO_TEX; \
- span->red += span->redStep; \
- span->green += span->greenStep; \
- span->blue += span->blueStep; \
- span->alpha += span->alphaStep; \
- span->intTex[0] += span->intTexStep[0]; \
- span->intTex[1] += span->intTexStep[1]; \
- dest += 4; \
- }
-
-#define SPAN_LINEAR(DO_TEX, COMPS) \
- for (i = 0; i < span->end; i++) { \
- /* Isn't it necessary to use FixedFloor below?? */ \
- const GLint s = FixedToInt(span->intTex[0]) & info->smask; \
- const GLint t = FixedToInt(span->intTex[1]) & info->tmask; \
- const GLfixed sf = span->intTex[0] & FIXED_FRAC_MASK; \
- const GLfixed tf = span->intTex[1] & FIXED_FRAC_MASK; \
- const GLint pos = (t << info->twidth_log2) + s; \
- const GLchan *tex00 = info->texture + COMPS * pos; \
- const GLchan *tex10 = tex00 + info->tbytesline; \
- const GLchan *tex01 = tex00 + COMPS; \
- const GLchan *tex11 = tex10 + COMPS; \
- if (t == info->tmask) { \
- tex10 -= info->tsize; \
- tex11 -= info->tsize; \
- } \
- if (s == info->smask) { \
- tex01 -= info->tbytesline; \
- tex11 -= info->tbytesline; \
- } \
- DO_TEX; \
- span->red += span->redStep; \
- span->green += span->greenStep; \
- span->blue += span->blueStep; \
- span->alpha += span->alphaStep; \
- span->intTex[0] += span->intTexStep[0]; \
- span->intTex[1] += span->intTexStep[1]; \
- dest += 4; \
- }
-
-
- GLuint i;
- GLchan *dest = span->array->rgba[0];
-
- /* Disable tex units so they're not re-applied in swrast_write_rgba_span */
- ctx->Texture._EnabledCoordUnits = 0x0;
-
- span->intTex[0] -= FIXED_HALF;
- span->intTex[1] -= FIXED_HALF;
- switch (info->filter) {
- case GL_NEAREST:
- switch (info->format) {
- case MESA_FORMAT_RGB888:
- switch (info->envmode) {
- case GL_MODULATE:
- SPAN_NEAREST(NEAREST_RGB;MODULATE,3);
- break;
- case GL_DECAL:
- case GL_REPLACE:
- SPAN_NEAREST(NEAREST_RGB_REPLACE,3);
- break;
- case GL_BLEND:
- SPAN_NEAREST(NEAREST_RGB;BLEND,3);
- break;
- case GL_ADD:
- SPAN_NEAREST(NEAREST_RGB;ADD,3);
- break;
- default:
- _mesa_problem(ctx, "bad tex env mode in SPAN_LINEAR");
- return;
- }
- break;
- case MESA_FORMAT_RGBA8888:
- switch(info->envmode) {
- case GL_MODULATE:
- SPAN_NEAREST(NEAREST_RGBA;MODULATE,4);
- break;
- case GL_DECAL:
- SPAN_NEAREST(NEAREST_RGBA;DECAL,4);
- break;
- case GL_BLEND:
- SPAN_NEAREST(NEAREST_RGBA;BLEND,4);
- break;
- case GL_ADD:
- SPAN_NEAREST(NEAREST_RGBA;ADD,4);
- break;
- case GL_REPLACE:
- SPAN_NEAREST(NEAREST_RGBA_REPLACE,4);
- break;
- default:
- _mesa_problem(ctx, "bad tex env mode (2) in SPAN_LINEAR");
- return;
- }
- break;
- }
- break;
-
- case GL_LINEAR:
- span->intTex[0] -= FIXED_HALF;
- span->intTex[1] -= FIXED_HALF;
- switch (info->format) {
- case MESA_FORMAT_RGB888:
- switch (info->envmode) {
- case GL_MODULATE:
- SPAN_LINEAR(LINEAR_RGB;MODULATE,3);
- break;
- case GL_DECAL:
- case GL_REPLACE:
- SPAN_LINEAR(LINEAR_RGB;REPLACE,3);
- break;
- case GL_BLEND:
- SPAN_LINEAR(LINEAR_RGB;BLEND,3);
- break;
- case GL_ADD:
- SPAN_LINEAR(LINEAR_RGB;ADD,3);
- break;
- default:
- _mesa_problem(ctx, "bad tex env mode (3) in SPAN_LINEAR");
- return;
- }
- break;
- case MESA_FORMAT_RGBA8888:
- switch (info->envmode) {
- case GL_MODULATE:
- SPAN_LINEAR(LINEAR_RGBA;MODULATE,4);
- break;
- case GL_DECAL:
- SPAN_LINEAR(LINEAR_RGBA;DECAL,4);
- break;
- case GL_BLEND:
- SPAN_LINEAR(LINEAR_RGBA;BLEND,4);
- break;
- case GL_ADD:
- SPAN_LINEAR(LINEAR_RGBA;ADD,4);
- break;
- case GL_REPLACE:
- SPAN_LINEAR(LINEAR_RGBA;REPLACE,4);
- break;
- default:
- _mesa_problem(ctx, "bad tex env mode (4) in SPAN_LINEAR");
- return;
- }
- break;
- }
- break;
- }
- span->interpMask &= ~SPAN_RGBA;
- ASSERT(span->arrayMask & SPAN_RGBA);
-
- _swrast_write_rgba_span(ctx, span);
-
- /* re-enable texture units */
- ctx->Texture._EnabledCoordUnits = texEnableSave;
-
-#undef SPAN_NEAREST
-#undef SPAN_LINEAR
-}
-
-
-
-/*
- * Render an RGB/RGBA textured triangle without perspective correction.
- */
-#define NAME affine_textured_triangle
-#define INTERP_Z 1
-#define INTERP_RGB 1
-#define INTERP_ALPHA 1
-#define INTERP_INT_TEX 1
-#define S_SCALE twidth
-#define T_SCALE theight
-
-#define SETUP_CODE \
- struct affine_info info; \
- struct gl_texture_unit *unit = ctx->Texture.Unit+0; \
- const struct gl_texture_object *obj = \
- ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \
- const struct gl_texture_image *texImg = \
- obj->Image[0][obj->BaseLevel]; \
- const GLfloat twidth = (GLfloat) texImg->Width; \
- const GLfloat theight = (GLfloat) texImg->Height; \
- info.texture = (const GLchan *) texImg->Data; \
- info.twidth_log2 = texImg->WidthLog2; \
- info.smask = texImg->Width - 1; \
- info.tmask = texImg->Height - 1; \
- info.format = texImg->TexFormat; \
- info.filter = obj->Sampler.MinFilter; \
- info.envmode = unit->EnvMode; \
- info.er = 0; \
- info.eg = 0; \
- info.eb = 0; \
- span.arrayMask |= SPAN_RGBA; \
- \
- if (info.envmode == GL_BLEND) { \
- /* potential off-by-one error here? (1.0f -> 2048 -> 0) */ \
- info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF); \
- info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF); \
- info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF); \
- info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF); \
- } \
- if (!info.texture) { \
- /* this shouldn't happen */ \
- return; \
- } \
- \
- switch (info.format) { \
- case MESA_FORMAT_RGB888: \
- info.tbytesline = texImg->Width * 3; \
- break; \
- case MESA_FORMAT_RGBA8888: \
- info.tbytesline = texImg->Width * 4; \
- break; \
- default: \
- _mesa_problem(NULL, "Bad texture format in affine_texture_triangle");\
- return; \
- } \
- info.tsize = texImg->Height * info.tbytesline;
-
-#define RENDER_SPAN( span ) affine_span(ctx, &span, &info);
-
-#include "s_tritemp.h"
-
-
-
-struct persp_info
-{
- GLenum filter;
- GLenum format;
- GLenum envmode;
- GLint smask, tmask;
- GLint twidth_log2;
- const GLchan *texture;
- GLfixed er, eg, eb, ea; /* texture env color */
- GLint tbytesline, tsize;
-};
-
-
-static INLINE void
-fast_persp_span(struct gl_context *ctx, SWspan *span,
- struct persp_info *info)
-{
- GLchan sample[4]; /* the filtered texture sample */
-
- /* Instead of defining a function for each mode, a test is done
- * between the outer and inner loops. This is to reduce code size
- * and complexity. Observe that an optimizing compiler kills
- * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST).
- */
-#define SPAN_NEAREST(DO_TEX,COMP) \
- for (i = 0; i < span->end; i++) { \
- GLdouble invQ = tex_coord[2] ? \
- (1.0 / tex_coord[2]) : 1.0; \
- GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ); \
- GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ); \
- GLint s = IFLOOR(s_tmp) & info->smask; \
- GLint t = IFLOOR(t_tmp) & info->tmask; \
- GLint pos = (t << info->twidth_log2) + s; \
- const GLchan *tex00 = info->texture + COMP * pos; \
- DO_TEX; \
- span->red += span->redStep; \
- span->green += span->greenStep; \
- span->blue += span->blueStep; \
- span->alpha += span->alphaStep; \
- tex_coord[0] += tex_step[0]; \
- tex_coord[1] += tex_step[1]; \
- tex_coord[2] += tex_step[2]; \
- dest += 4; \
- }
-
-#define SPAN_LINEAR(DO_TEX,COMP) \
- for (i = 0; i < span->end; i++) { \
- GLdouble invQ = tex_coord[2] ? \
- (1.0 / tex_coord[2]) : 1.0; \
- const GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ); \
- const GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ); \
- const GLfixed s_fix = FloatToFixed(s_tmp) - FIXED_HALF; \
- const GLfixed t_fix = FloatToFixed(t_tmp) - FIXED_HALF; \
- const GLint s = FixedToInt(FixedFloor(s_fix)) & info->smask; \
- const GLint t = FixedToInt(FixedFloor(t_fix)) & info->tmask; \
- const GLfixed sf = s_fix & FIXED_FRAC_MASK; \
- const GLfixed tf = t_fix & FIXED_FRAC_MASK; \
- const GLint pos = (t << info->twidth_log2) + s; \
- const GLchan *tex00 = info->texture + COMP * pos; \
- const GLchan *tex10 = tex00 + info->tbytesline; \
- const GLchan *tex01 = tex00 + COMP; \
- const GLchan *tex11 = tex10 + COMP; \
- if (t == info->tmask) { \
- tex10 -= info->tsize; \
- tex11 -= info->tsize; \
- } \
- if (s == info->smask) { \
- tex01 -= info->tbytesline; \
- tex11 -= info->tbytesline; \
- } \
- DO_TEX; \
- span->red += span->redStep; \
- span->green += span->greenStep; \
- span->blue += span->blueStep; \
- span->alpha += span->alphaStep; \
- tex_coord[0] += tex_step[0]; \
- tex_coord[1] += tex_step[1]; \
- tex_coord[2] += tex_step[2]; \
- dest += 4; \
- }
-
- GLuint i;
- GLfloat tex_coord[3], tex_step[3];
- GLchan *dest = span->array->rgba[0];
-
- const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits;
- ctx->Texture._EnabledCoordUnits = 0;
-
- tex_coord[0] = span->attrStart[FRAG_ATTRIB_TEX0][0] * (info->smask + 1);
- tex_step[0] = span->attrStepX[FRAG_ATTRIB_TEX0][0] * (info->smask + 1);
- tex_coord[1] = span->attrStart[FRAG_ATTRIB_TEX0][1] * (info->tmask + 1);
- tex_step[1] = span->attrStepX[FRAG_ATTRIB_TEX0][1] * (info->tmask + 1);
- /* span->attrStart[FRAG_ATTRIB_TEX0][2] only if 3D-texturing, here only 2D */
- tex_coord[2] = span->attrStart[FRAG_ATTRIB_TEX0][3];
- tex_step[2] = span->attrStepX[FRAG_ATTRIB_TEX0][3];
-
- switch (info->filter) {
- case GL_NEAREST:
- switch (info->format) {
- case MESA_FORMAT_RGB888:
- switch (info->envmode) {
- case GL_MODULATE:
- SPAN_NEAREST(NEAREST_RGB;MODULATE,3);
- break;
- case GL_DECAL:
- case GL_REPLACE:
- SPAN_NEAREST(NEAREST_RGB_REPLACE,3);
- break;
- case GL_BLEND:
- SPAN_NEAREST(NEAREST_RGB;BLEND,3);
- break;
- case GL_ADD:
- SPAN_NEAREST(NEAREST_RGB;ADD,3);
- break;
- default:
- _mesa_problem(ctx, "bad tex env mode (5) in SPAN_LINEAR");
- return;
- }
- break;
- case MESA_FORMAT_RGBA8888:
- switch(info->envmode) {
- case GL_MODULATE:
- SPAN_NEAREST(NEAREST_RGBA;MODULATE,4);
- break;
- case GL_DECAL:
- SPAN_NEAREST(NEAREST_RGBA;DECAL,4);
- break;
- case GL_BLEND:
- SPAN_NEAREST(NEAREST_RGBA;BLEND,4);
- break;
- case GL_ADD:
- SPAN_NEAREST(NEAREST_RGBA;ADD,4);
- break;
- case GL_REPLACE:
- SPAN_NEAREST(NEAREST_RGBA_REPLACE,4);
- break;
- default:
- _mesa_problem(ctx, "bad tex env mode (6) in SPAN_LINEAR");
- return;
- }
- break;
- }
- break;
-
- case GL_LINEAR:
- switch (info->format) {
- case MESA_FORMAT_RGB888:
- switch (info->envmode) {
- case GL_MODULATE:
- SPAN_LINEAR(LINEAR_RGB;MODULATE,3);
- break;
- case GL_DECAL:
- case GL_REPLACE:
- SPAN_LINEAR(LINEAR_RGB;REPLACE,3);
- break;
- case GL_BLEND:
- SPAN_LINEAR(LINEAR_RGB;BLEND,3);
- break;
- case GL_ADD:
- SPAN_LINEAR(LINEAR_RGB;ADD,3);
- break;
- default:
- _mesa_problem(ctx, "bad tex env mode (7) in SPAN_LINEAR");
- return;
- }
- break;
- case MESA_FORMAT_RGBA8888:
- switch (info->envmode) {
- case GL_MODULATE:
- SPAN_LINEAR(LINEAR_RGBA;MODULATE,4);
- break;
- case GL_DECAL:
- SPAN_LINEAR(LINEAR_RGBA;DECAL,4);
- break;
- case GL_BLEND:
- SPAN_LINEAR(LINEAR_RGBA;BLEND,4);
- break;
- case GL_ADD:
- SPAN_LINEAR(LINEAR_RGBA;ADD,4);
- break;
- case GL_REPLACE:
- SPAN_LINEAR(LINEAR_RGBA;REPLACE,4);
- break;
- default:
- _mesa_problem(ctx, "bad tex env mode (8) in SPAN_LINEAR");
- return;
- }
- break;
- }
- break;
- }
-
- ASSERT(span->arrayMask & SPAN_RGBA);
- _swrast_write_rgba_span(ctx, span);
-
-#undef SPAN_NEAREST
-#undef SPAN_LINEAR
-
- /* restore state */
- ctx->Texture._EnabledCoordUnits = texEnableSave;
-}
-
-
-/*
- * Render an perspective corrected RGB/RGBA textured triangle.
- * The Q (aka V in Mesa) coordinate must be zero such that the divide
- * by interpolated Q/W comes out right.
- *
- */
-#define NAME persp_textured_triangle
-#define INTERP_Z 1
-#define INTERP_RGB 1
-#define INTERP_ALPHA 1
-#define INTERP_ATTRIBS 1
-
-#define SETUP_CODE \
- struct persp_info info; \
- const struct gl_texture_unit *unit = ctx->Texture.Unit+0; \
- const struct gl_texture_object *obj = \
- ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \
- const struct gl_texture_image *texImg = \
- obj->Image[0][obj->BaseLevel]; \
- info.texture = (const GLchan *) texImg->Data; \
- info.twidth_log2 = texImg->WidthLog2; \
- info.smask = texImg->Width - 1; \
- info.tmask = texImg->Height - 1; \
- info.format = texImg->TexFormat; \
- info.filter = obj->Sampler.MinFilter; \
- info.envmode = unit->EnvMode; \
- info.er = 0; \
- info.eg = 0; \
- info.eb = 0; \
- \
- if (info.envmode == GL_BLEND) { \
- /* potential off-by-one error here? (1.0f -> 2048 -> 0) */ \
- info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF); \
- info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF); \
- info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF); \
- info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF); \
- } \
- if (!info.texture) { \
- /* this shouldn't happen */ \
- return; \
- } \
- \
- switch (info.format) { \
- case MESA_FORMAT_RGB888: \
- info.tbytesline = texImg->Width * 3; \
- break; \
- case MESA_FORMAT_RGBA8888: \
- info.tbytesline = texImg->Width * 4; \
- break; \
- default: \
- _mesa_problem(NULL, "Bad texture format in persp_textured_triangle");\
- return; \
- } \
- info.tsize = texImg->Height * info.tbytesline;
-
-#define RENDER_SPAN( span ) \
- span.interpMask &= ~SPAN_RGBA; \
- span.arrayMask |= SPAN_RGBA; \
- fast_persp_span(ctx, &span, &info);
-
-#include "s_tritemp.h"
-
-#endif /*CHAN_TYPE != GL_FLOAT*/
-
-
-
-/*
- * Render an RGBA triangle with arbitrary attributes.
- */
-#define NAME general_triangle
-#define INTERP_Z 1
-#define INTERP_RGB 1
-#define INTERP_ALPHA 1
-#define INTERP_ATTRIBS 1
-#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span);
-#include "s_tritemp.h"
-
-
-
-
-/*
- * Special tri function for occlusion testing
- */
-#define NAME occlusion_zless_triangle
-#define INTERP_Z 1
-#define SETUP_CODE \
- struct gl_renderbuffer *rb = ctx->DrawBuffer->_DepthBuffer; \
- struct gl_query_object *q = ctx->Query.CurrentOcclusionObject; \
- ASSERT(ctx->Depth.Test); \
- ASSERT(!ctx->Depth.Mask); \
- ASSERT(ctx->Depth.Func == GL_LESS); \
- if (!q) { \
- return; \
- }
-#define RENDER_SPAN( span ) \
- if (rb->Format == MESA_FORMAT_Z16) { \
- GLuint i; \
- const GLushort *zRow = (const GLushort *) \
- rb->GetPointer(ctx, rb, span.x, span.y); \
- for (i = 0; i < span.end; i++) { \
- GLuint z = FixedToDepth(span.z); \
- if (z < zRow[i]) { \
- q->Result++; \
- } \
- span.z += span.zStep; \
- } \
- } \
- else { \
- GLuint i; \
- const GLuint *zRow = (const GLuint *) \
- rb->GetPointer(ctx, rb, span.x, span.y); \
- for (i = 0; i < span.end; i++) { \
- if ((GLuint)span.z < zRow[i]) { \
- q->Result++; \
- } \
- span.z += span.zStep; \
- } \
- }
-#include "s_tritemp.h"
-
-
-
-static void
-nodraw_triangle( struct gl_context *ctx,
- const SWvertex *v0,
- const SWvertex *v1,
- const SWvertex *v2 )
-{
- (void) (ctx && v0 && v1 && v2);
-}
-
-
-/*
- * This is used when separate specular color is enabled, but not
- * texturing. We add the specular color to the primary color,
- * draw the triangle, then restore the original primary color.
- * Inefficient, but seldom needed.
- */
-void
-_swrast_add_spec_terms_triangle(struct gl_context *ctx, const SWvertex *v0,
- const SWvertex *v1, const SWvertex *v2)
-{
- SWvertex *ncv0 = (SWvertex *)v0; /* drop const qualifier */
- SWvertex *ncv1 = (SWvertex *)v1;
- SWvertex *ncv2 = (SWvertex *)v2;
- GLfloat rSum, gSum, bSum;
- GLchan cSave[3][4];
-
- /* save original colors */
- COPY_CHAN4( cSave[0], ncv0->color );
- COPY_CHAN4( cSave[1], ncv1->color );
- COPY_CHAN4( cSave[2], ncv2->color );
- /* sum v0 */
- rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0];
- gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1];
- bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2];
- UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum);
- UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum);
- UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum);
- /* sum v1 */
- rSum = CHAN_TO_FLOAT(ncv1->color[0]) + ncv1->attrib[FRAG_ATTRIB_COL1][0];
- gSum = CHAN_TO_FLOAT(ncv1->color[1]) + ncv1->attrib[FRAG_ATTRIB_COL1][1];
- bSum = CHAN_TO_FLOAT(ncv1->color[2]) + ncv1->attrib[FRAG_ATTRIB_COL1][2];
- UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[0], rSum);
- UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[1], gSum);
- UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[2], bSum);
- /* sum v2 */
- rSum = CHAN_TO_FLOAT(ncv2->color[0]) + ncv2->attrib[FRAG_ATTRIB_COL1][0];
- gSum = CHAN_TO_FLOAT(ncv2->color[1]) + ncv2->attrib[FRAG_ATTRIB_COL1][1];
- bSum = CHAN_TO_FLOAT(ncv2->color[2]) + ncv2->attrib[FRAG_ATTRIB_COL1][2];
- UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[0], rSum);
- UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[1], gSum);
- UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[2], bSum);
- /* draw */
- SWRAST_CONTEXT(ctx)->SpecTriangle( ctx, ncv0, ncv1, ncv2 );
- /* restore original colors */
- COPY_CHAN4( ncv0->color, cSave[0] );
- COPY_CHAN4( ncv1->color, cSave[1] );
- COPY_CHAN4( ncv2->color, cSave[2] );
-}
-
-
-
-#ifdef DEBUG
-
-/* record the current triangle function name */
-const char *_mesa_triFuncName = NULL;
-
-#define USE(triFunc) \
-do { \
- _mesa_triFuncName = #triFunc; \
- /*printf("%s\n", _mesa_triFuncName);*/ \
- swrast->Triangle = triFunc; \
-} while (0)
-
-#else
-
-#define USE(triFunc) swrast->Triangle = triFunc;
-
-#endif
-
-
-
-
-/*
- * Determine which triangle rendering function to use given the current
- * rendering context.
- *
- * Please update the summary flag _SWRAST_NEW_TRIANGLE if you add or
- * remove tests to this code.
- */
-void
-_swrast_choose_triangle( struct gl_context *ctx )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
- if (ctx->Polygon.CullFlag &&
- ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) {
- USE(nodraw_triangle);
- return;
- }
-
- if (ctx->RenderMode==GL_RENDER) {
-
- if (ctx->Polygon.SmoothFlag) {
- _swrast_set_aa_triangle_function(ctx);
- ASSERT(swrast->Triangle);
- return;
- }
-
- /* special case for occlusion testing */
- if (ctx->Query.CurrentOcclusionObject &&
- ctx->Depth.Test &&
- ctx->Depth.Mask == GL_FALSE &&
- ctx->Depth.Func == GL_LESS &&
- !ctx->Stencil._Enabled) {
- if (ctx->Color.ColorMask[0][0] == 0 &&
- ctx->Color.ColorMask[0][1] == 0 &&
- ctx->Color.ColorMask[0][2] == 0 &&
- ctx->Color.ColorMask[0][3] == 0) {
- USE(occlusion_zless_triangle);
- return;
- }
- }
-
- /*
- * XXX should examine swrast->_ActiveAttribMask to determine what
- * needs to be interpolated.
- */
- if (ctx->Texture._EnabledCoordUnits ||
- ctx->FragmentProgram._Current ||
- ctx->ATIFragmentShader._Enabled ||
- _mesa_need_secondary_color(ctx) ||
- swrast->_FogEnabled) {
- /* Ugh, we do a _lot_ of tests to pick the best textured tri func */
- const struct gl_texture_object *texObj2D;
- const struct gl_texture_image *texImg;
- GLenum minFilter, magFilter, envMode;
- gl_format format;
- texObj2D = ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];
-
- texImg = texObj2D ? texObj2D->Image[0][texObj2D->BaseLevel] : NULL;
- format = texImg ? texImg->TexFormat : MESA_FORMAT_NONE;
- minFilter = texObj2D ? texObj2D->Sampler.MinFilter : GL_NONE;
- magFilter = texObj2D ? texObj2D->Sampler.MagFilter : GL_NONE;
- envMode = ctx->Texture.Unit[0].EnvMode;
-
- /* First see if we can use an optimized 2-D texture function */
- if (ctx->Texture._EnabledCoordUnits == 0x1
- && !ctx->FragmentProgram._Current
- && !ctx->ATIFragmentShader._Enabled
- && ctx->Texture._EnabledUnits == 0x1
- && ctx->Texture.Unit[0]._ReallyEnabled == TEXTURE_2D_BIT
- && texObj2D->Sampler.WrapS == GL_REPEAT
- && texObj2D->Sampler.WrapT == GL_REPEAT
- && texObj2D->_Swizzle == SWIZZLE_NOOP
- && texImg->_IsPowerOfTwo
- && texImg->Border == 0
- && texImg->Width == texImg->RowStride
- && (format == MESA_FORMAT_RGB888 || format == MESA_FORMAT_RGBA8888)
- && minFilter == magFilter
- && ctx->Light.Model.ColorControl == GL_SINGLE_COLOR
- && !swrast->_FogEnabled
- && ctx->Texture.Unit[0].EnvMode != GL_COMBINE_EXT
- && ctx->Texture.Unit[0].EnvMode != GL_COMBINE4_NV) {
- if (ctx->Hint.PerspectiveCorrection==GL_FASTEST) {
- if (minFilter == GL_NEAREST
- && format == MESA_FORMAT_RGB888
- && (envMode == GL_REPLACE || envMode == GL_DECAL)
- && ((swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)
- && ctx->Depth.Func == GL_LESS
- && ctx->Depth.Mask == GL_TRUE)
- || swrast->_RasterMask == TEXTURE_BIT)
- && ctx->Polygon.StippleFlag == GL_FALSE
- && ctx->DrawBuffer->Visual.depthBits <= 16) {
- if (swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)) {
- USE(simple_z_textured_triangle);
- }
- else {
- USE(simple_textured_triangle);
- }
- }
- else {
-#if CHAN_BITS != 8
- USE(general_triangle);
-#else
- if (format == MESA_FORMAT_RGBA8888 && !_mesa_little_endian()) {
- /* We only handle RGBA8888 correctly on little endian
- * in the optimized code above.
- */
- USE(general_triangle);
- }
- else {
- USE(affine_textured_triangle);
- }
-#endif
- }
- }
- else {
-#if CHAN_BITS != 8
- USE(general_triangle);
-#else
- USE(persp_textured_triangle);
-#endif
- }
- }
- else {
- /* general case textured triangles */
- USE(general_triangle);
- }
- }
- else {
- ASSERT(!swrast->_FogEnabled);
- ASSERT(!_mesa_need_secondary_color(ctx));
- if (ctx->Light.ShadeModel==GL_SMOOTH) {
- /* smooth shaded, no texturing, stippled or some raster ops */
-#if CHAN_BITS != 8
- USE(general_triangle);
-#else
- USE(smooth_rgba_triangle);
-#endif
- }
- else {
- /* flat shaded, no texturing, stippled or some raster ops */
-#if CHAN_BITS != 8
- USE(general_triangle);
-#else
- USE(flat_rgba_triangle);
-#endif
- }
- }
- }
- else if (ctx->RenderMode==GL_FEEDBACK) {
- USE(_swrast_feedback_triangle);
- }
- else {
- /* GL_SELECT mode */
- USE(_swrast_select_triangle);
- }
-}
+/*
+ * Mesa 3-D graphics library
+ * Version: 7.3
+ *
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * When the device driver doesn't implement triangle rasterization it
+ * can hook in _swrast_Triangle, which eventually calls one of these
+ * functions to draw triangles.
+ */
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "main/mtypes.h"
+#include "main/state.h"
+#include "program/prog_instruction.h"
+
+#include "s_aatriangle.h"
+#include "s_context.h"
+#include "s_feedback.h"
+#include "s_span.h"
+#include "s_triangle.h"
+
+
+/**
+ * Test if a triangle should be culled. Used for feedback and selection mode.
+ * \return GL_TRUE if the triangle is to be culled, GL_FALSE otherwise.
+ */
+GLboolean
+_swrast_culltriangle( struct gl_context *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2 )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLfloat ex = v1->attrib[FRAG_ATTRIB_WPOS][0] - v0->attrib[FRAG_ATTRIB_WPOS][0];
+ GLfloat ey = v1->attrib[FRAG_ATTRIB_WPOS][1] - v0->attrib[FRAG_ATTRIB_WPOS][1];
+ GLfloat fx = v2->attrib[FRAG_ATTRIB_WPOS][0] - v0->attrib[FRAG_ATTRIB_WPOS][0];
+ GLfloat fy = v2->attrib[FRAG_ATTRIB_WPOS][1] - v0->attrib[FRAG_ATTRIB_WPOS][1];
+ GLfloat c = ex*fy-ey*fx;
+
+ if (c * swrast->_BackfaceSign * swrast->_BackfaceCullSign <= 0.0F)
+ return GL_FALSE;
+
+ return GL_TRUE;
+}
+
+
+
+/*
+ * Render a flat-shaded RGBA triangle.
+ */
+#define NAME flat_rgba_triangle
+#define INTERP_Z 1
+#define SETUP_CODE \
+ ASSERT(ctx->Texture._EnabledCoordUnits == 0);\
+ ASSERT(ctx->Light.ShadeModel==GL_FLAT); \
+ span.interpMask |= SPAN_RGBA; \
+ span.red = ChanToFixed(v2->color[0]); \
+ span.green = ChanToFixed(v2->color[1]); \
+ span.blue = ChanToFixed(v2->color[2]); \
+ span.alpha = ChanToFixed(v2->color[3]); \
+ span.redStep = 0; \
+ span.greenStep = 0; \
+ span.blueStep = 0; \
+ span.alphaStep = 0;
+#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span);
+#include "s_tritemp.h"
+
+
+
+/*
+ * Render a smooth-shaded RGBA triangle.
+ */
+#define NAME smooth_rgba_triangle
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define SETUP_CODE \
+ { \
+ /* texturing must be off */ \
+ ASSERT(ctx->Texture._EnabledCoordUnits == 0); \
+ ASSERT(ctx->Light.ShadeModel==GL_SMOOTH); \
+ }
+#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span);
+#include "s_tritemp.h"
+
+
+
+/*
+ * Render an RGB, GL_DECAL, textured triangle.
+ * Interpolate S,T only w/out mipmapping or perspective correction.
+ *
+ * No fog. No depth testing.
+ */
+#define NAME simple_textured_triangle
+#define INTERP_INT_TEX 1
+#define S_SCALE twidth
+#define T_SCALE theight
+
+#define SETUP_CODE \
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; \
+ const struct gl_texture_object *obj = \
+ ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \
+ const struct gl_texture_image *texImg = \
+ obj->Image[0][obj->BaseLevel]; \
+ const GLfloat twidth = (GLfloat) texImg->Width; \
+ const GLfloat theight = (GLfloat) texImg->Height; \
+ const GLint twidth_log2 = texImg->WidthLog2; \
+ const GLubyte *texture = (const GLubyte *) texImg->Data; \
+ const GLint smask = texImg->Width - 1; \
+ const GLint tmask = texImg->Height - 1; \
+ ASSERT(texImg->TexFormat == MESA_FORMAT_RGB888); \
+ if (!rb || !texture) { \
+ return; \
+ }
+
+#define RENDER_SPAN( span ) \
+ GLuint i; \
+ GLubyte rgb[MAX_WIDTH][3]; \
+ span.intTex[0] -= FIXED_HALF; /* off-by-one error? */ \
+ span.intTex[1] -= FIXED_HALF; \
+ for (i = 0; i < span.end; i++) { \
+ GLint s = FixedToInt(span.intTex[0]) & smask; \
+ GLint t = FixedToInt(span.intTex[1]) & tmask; \
+ GLint pos = (t << twidth_log2) + s; \
+ pos = pos + pos + pos; /* multiply by 3 */ \
+ rgb[i][RCOMP] = texture[pos+2]; \
+ rgb[i][GCOMP] = texture[pos+1]; \
+ rgb[i][BCOMP] = texture[pos+0]; \
+ span.intTex[0] += span.intTexStep[0]; \
+ span.intTex[1] += span.intTexStep[1]; \
+ } \
+ rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, rgb, NULL);
+
+#include "s_tritemp.h"
+
+
+
+/*
+ * Render an RGB, GL_DECAL, textured triangle.
+ * Interpolate S,T, GL_LESS depth test, w/out mipmapping or
+ * perspective correction.
+ * Depth buffer bits must be <= sizeof(DEFAULT_SOFTWARE_DEPTH_TYPE)
+ *
+ * No fog.
+ */
+#define NAME simple_z_textured_triangle
+#define INTERP_Z 1
+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
+#define INTERP_INT_TEX 1
+#define S_SCALE twidth
+#define T_SCALE theight
+
+#define SETUP_CODE \
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; \
+ const struct gl_texture_object *obj = \
+ ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \
+ const struct gl_texture_image *texImg = \
+ obj->Image[0][obj->BaseLevel]; \
+ const GLfloat twidth = (GLfloat) texImg->Width; \
+ const GLfloat theight = (GLfloat) texImg->Height; \
+ const GLint twidth_log2 = texImg->WidthLog2; \
+ const GLubyte *texture = (const GLubyte *) texImg->Data; \
+ const GLint smask = texImg->Width - 1; \
+ const GLint tmask = texImg->Height - 1; \
+ ASSERT(texImg->TexFormat == MESA_FORMAT_RGB888); \
+ if (!rb || !texture) { \
+ return; \
+ }
+
+#define RENDER_SPAN( span ) \
+ GLuint i; \
+ GLubyte rgb[MAX_WIDTH][3]; \
+ span.intTex[0] -= FIXED_HALF; /* off-by-one error? */ \
+ span.intTex[1] -= FIXED_HALF; \
+ for (i = 0; i < span.end; i++) { \
+ const GLuint z = FixedToDepth(span.z); \
+ if (z < zRow[i]) { \
+ GLint s = FixedToInt(span.intTex[0]) & smask; \
+ GLint t = FixedToInt(span.intTex[1]) & tmask; \
+ GLint pos = (t << twidth_log2) + s; \
+ pos = pos + pos + pos; /* multiply by 3 */ \
+ rgb[i][RCOMP] = texture[pos+2]; \
+ rgb[i][GCOMP] = texture[pos+1]; \
+ rgb[i][BCOMP] = texture[pos+0]; \
+ zRow[i] = z; \
+ span.array->mask[i] = 1; \
+ } \
+ else { \
+ span.array->mask[i] = 0; \
+ } \
+ span.intTex[0] += span.intTexStep[0]; \
+ span.intTex[1] += span.intTexStep[1]; \
+ span.z += span.zStep; \
+ } \
+ rb->PutRowRGB(ctx, rb, span.end, span.x, span.y, rgb, span.array->mask);
+
+#include "s_tritemp.h"
+
+
+#if CHAN_TYPE != GL_FLOAT
+
+struct affine_info
+{
+ GLenum filter;
+ GLenum format;
+ GLenum envmode;
+ GLint smask, tmask;
+ GLint twidth_log2;
+ const GLchan *texture;
+ GLfixed er, eg, eb, ea;
+ GLint tbytesline, tsize;
+};
+
+
+static INLINE GLint
+ilerp(GLint t, GLint a, GLint b)
+{
+ return a + ((t * (b - a)) >> FIXED_SHIFT);
+}
+
+static INLINE GLint
+ilerp_2d(GLint ia, GLint ib, GLint v00, GLint v10, GLint v01, GLint v11)
+{
+ const GLint temp0 = ilerp(ia, v00, v10);
+ const GLint temp1 = ilerp(ia, v01, v11);
+ return ilerp(ib, temp0, temp1);
+}
+
+
+/* This function can handle GL_NEAREST or GL_LINEAR sampling of 2D RGB or RGBA
+ * textures with GL_REPLACE, GL_MODULATE, GL_BLEND, GL_DECAL or GL_ADD
+ * texture env modes.
+ */
+static INLINE void
+affine_span(struct gl_context *ctx, SWspan *span,
+ struct affine_info *info)
+{
+ GLchan sample[4]; /* the filtered texture sample */
+ const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits;
+
+ /* Instead of defining a function for each mode, a test is done
+ * between the outer and inner loops. This is to reduce code size
+ * and complexity. Observe that an optimizing compiler kills
+ * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST).
+ */
+
+#define NEAREST_RGB \
+ sample[RCOMP] = tex00[2]; \
+ sample[GCOMP] = tex00[1]; \
+ sample[BCOMP] = tex00[0]; \
+ sample[ACOMP] = CHAN_MAX;
+
+#define LINEAR_RGB \
+ sample[RCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\
+ sample[GCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\
+ sample[BCOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0]);\
+ sample[ACOMP] = CHAN_MAX;
+
+#define NEAREST_RGBA \
+ sample[RCOMP] = tex00[3]; \
+ sample[GCOMP] = tex00[2]; \
+ sample[BCOMP] = tex00[1]; \
+ sample[ACOMP] = tex00[0];
+
+#define LINEAR_RGBA \
+ sample[RCOMP] = ilerp_2d(sf, tf, tex00[3], tex01[3], tex10[3], tex11[3]);\
+ sample[GCOMP] = ilerp_2d(sf, tf, tex00[2], tex01[2], tex10[2], tex11[2]);\
+ sample[BCOMP] = ilerp_2d(sf, tf, tex00[1], tex01[1], tex10[1], tex11[1]);\
+ sample[ACOMP] = ilerp_2d(sf, tf, tex00[0], tex01[0], tex10[0], tex11[0])
+
+#define MODULATE \
+ dest[RCOMP] = span->red * (sample[RCOMP] + 1u) >> (FIXED_SHIFT + 8); \
+ dest[GCOMP] = span->green * (sample[GCOMP] + 1u) >> (FIXED_SHIFT + 8); \
+ dest[BCOMP] = span->blue * (sample[BCOMP] + 1u) >> (FIXED_SHIFT + 8); \
+ dest[ACOMP] = span->alpha * (sample[ACOMP] + 1u) >> (FIXED_SHIFT + 8)
+
+#define DECAL \
+ dest[RCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->red + \
+ ((sample[ACOMP] + 1) * sample[RCOMP] << FIXED_SHIFT)) \
+ >> (FIXED_SHIFT + 8); \
+ dest[GCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->green + \
+ ((sample[ACOMP] + 1) * sample[GCOMP] << FIXED_SHIFT)) \
+ >> (FIXED_SHIFT + 8); \
+ dest[BCOMP] = ((CHAN_MAX - sample[ACOMP]) * span->blue + \
+ ((sample[ACOMP] + 1) * sample[BCOMP] << FIXED_SHIFT)) \
+ >> (FIXED_SHIFT + 8); \
+ dest[ACOMP] = FixedToInt(span->alpha)
+
+#define BLEND \
+ dest[RCOMP] = ((CHAN_MAX - sample[RCOMP]) * span->red \
+ + (sample[RCOMP] + 1) * info->er) >> (FIXED_SHIFT + 8); \
+ dest[GCOMP] = ((CHAN_MAX - sample[GCOMP]) * span->green \
+ + (sample[GCOMP] + 1) * info->eg) >> (FIXED_SHIFT + 8); \
+ dest[BCOMP] = ((CHAN_MAX - sample[BCOMP]) * span->blue \
+ + (sample[BCOMP] + 1) * info->eb) >> (FIXED_SHIFT + 8); \
+ dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8)
+
+#define REPLACE COPY_CHAN4(dest, sample)
+
+#define ADD \
+ { \
+ GLint rSum = FixedToInt(span->red) + (GLint) sample[RCOMP]; \
+ GLint gSum = FixedToInt(span->green) + (GLint) sample[GCOMP]; \
+ GLint bSum = FixedToInt(span->blue) + (GLint) sample[BCOMP]; \
+ dest[RCOMP] = MIN2(rSum, CHAN_MAX); \
+ dest[GCOMP] = MIN2(gSum, CHAN_MAX); \
+ dest[BCOMP] = MIN2(bSum, CHAN_MAX); \
+ dest[ACOMP] = span->alpha * (sample[ACOMP] + 1) >> (FIXED_SHIFT + 8); \
+ }
+
+/* shortcuts */
+
+#define NEAREST_RGB_REPLACE \
+ NEAREST_RGB; \
+ dest[0] = sample[0]; \
+ dest[1] = sample[1]; \
+ dest[2] = sample[2]; \
+ dest[3] = FixedToInt(span->alpha);
+
+#define NEAREST_RGBA_REPLACE \
+ dest[RCOMP] = tex00[3]; \
+ dest[GCOMP] = tex00[2]; \
+ dest[BCOMP] = tex00[1]; \
+ dest[ACOMP] = tex00[0]
+
+#define SPAN_NEAREST(DO_TEX, COMPS) \
+ for (i = 0; i < span->end; i++) { \
+ /* Isn't it necessary to use FixedFloor below?? */ \
+ GLint s = FixedToInt(span->intTex[0]) & info->smask; \
+ GLint t = FixedToInt(span->intTex[1]) & info->tmask; \
+ GLint pos = (t << info->twidth_log2) + s; \
+ const GLchan *tex00 = info->texture + COMPS * pos; \
+ DO_TEX; \
+ span->red += span->redStep; \
+ span->green += span->greenStep; \
+ span->blue += span->blueStep; \
+ span->alpha += span->alphaStep; \
+ span->intTex[0] += span->intTexStep[0]; \
+ span->intTex[1] += span->intTexStep[1]; \
+ dest += 4; \
+ }
+
+#define SPAN_LINEAR(DO_TEX, COMPS) \
+ for (i = 0; i < span->end; i++) { \
+ /* Isn't it necessary to use FixedFloor below?? */ \
+ const GLint s = FixedToInt(span->intTex[0]) & info->smask; \
+ const GLint t = FixedToInt(span->intTex[1]) & info->tmask; \
+ const GLfixed sf = span->intTex[0] & FIXED_FRAC_MASK; \
+ const GLfixed tf = span->intTex[1] & FIXED_FRAC_MASK; \
+ const GLint pos = (t << info->twidth_log2) + s; \
+ const GLchan *tex00 = info->texture + COMPS * pos; \
+ const GLchan *tex10 = tex00 + info->tbytesline; \
+ const GLchan *tex01 = tex00 + COMPS; \
+ const GLchan *tex11 = tex10 + COMPS; \
+ if (t == info->tmask) { \
+ tex10 -= info->tsize; \
+ tex11 -= info->tsize; \
+ } \
+ if (s == info->smask) { \
+ tex01 -= info->tbytesline; \
+ tex11 -= info->tbytesline; \
+ } \
+ DO_TEX; \
+ span->red += span->redStep; \
+ span->green += span->greenStep; \
+ span->blue += span->blueStep; \
+ span->alpha += span->alphaStep; \
+ span->intTex[0] += span->intTexStep[0]; \
+ span->intTex[1] += span->intTexStep[1]; \
+ dest += 4; \
+ }
+
+
+ GLuint i;
+ GLchan *dest = span->array->rgba[0];
+
+ /* Disable tex units so they're not re-applied in swrast_write_rgba_span */
+ ctx->Texture._EnabledCoordUnits = 0x0;
+
+ span->intTex[0] -= FIXED_HALF;
+ span->intTex[1] -= FIXED_HALF;
+ switch (info->filter) {
+ case GL_NEAREST:
+ switch (info->format) {
+ case MESA_FORMAT_RGB888:
+ switch (info->envmode) {
+ case GL_MODULATE:
+ SPAN_NEAREST(NEAREST_RGB;MODULATE,3);
+ break;
+ case GL_DECAL:
+ case GL_REPLACE:
+ SPAN_NEAREST(NEAREST_RGB_REPLACE,3);
+ break;
+ case GL_BLEND:
+ SPAN_NEAREST(NEAREST_RGB;BLEND,3);
+ break;
+ case GL_ADD:
+ SPAN_NEAREST(NEAREST_RGB;ADD,3);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode in SPAN_LINEAR");
+ return;
+ }
+ break;
+ case MESA_FORMAT_RGBA8888:
+ switch(info->envmode) {
+ case GL_MODULATE:
+ SPAN_NEAREST(NEAREST_RGBA;MODULATE,4);
+ break;
+ case GL_DECAL:
+ SPAN_NEAREST(NEAREST_RGBA;DECAL,4);
+ break;
+ case GL_BLEND:
+ SPAN_NEAREST(NEAREST_RGBA;BLEND,4);
+ break;
+ case GL_ADD:
+ SPAN_NEAREST(NEAREST_RGBA;ADD,4);
+ break;
+ case GL_REPLACE:
+ SPAN_NEAREST(NEAREST_RGBA_REPLACE,4);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (2) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ }
+ break;
+
+ case GL_LINEAR:
+ span->intTex[0] -= FIXED_HALF;
+ span->intTex[1] -= FIXED_HALF;
+ switch (info->format) {
+ case MESA_FORMAT_RGB888:
+ switch (info->envmode) {
+ case GL_MODULATE:
+ SPAN_LINEAR(LINEAR_RGB;MODULATE,3);
+ break;
+ case GL_DECAL:
+ case GL_REPLACE:
+ SPAN_LINEAR(LINEAR_RGB;REPLACE,3);
+ break;
+ case GL_BLEND:
+ SPAN_LINEAR(LINEAR_RGB;BLEND,3);
+ break;
+ case GL_ADD:
+ SPAN_LINEAR(LINEAR_RGB;ADD,3);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (3) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ case MESA_FORMAT_RGBA8888:
+ switch (info->envmode) {
+ case GL_MODULATE:
+ SPAN_LINEAR(LINEAR_RGBA;MODULATE,4);
+ break;
+ case GL_DECAL:
+ SPAN_LINEAR(LINEAR_RGBA;DECAL,4);
+ break;
+ case GL_BLEND:
+ SPAN_LINEAR(LINEAR_RGBA;BLEND,4);
+ break;
+ case GL_ADD:
+ SPAN_LINEAR(LINEAR_RGBA;ADD,4);
+ break;
+ case GL_REPLACE:
+ SPAN_LINEAR(LINEAR_RGBA;REPLACE,4);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (4) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ }
+ break;
+ }
+ span->interpMask &= ~SPAN_RGBA;
+ ASSERT(span->arrayMask & SPAN_RGBA);
+
+ _swrast_write_rgba_span(ctx, span);
+
+ /* re-enable texture units */
+ ctx->Texture._EnabledCoordUnits = texEnableSave;
+
+#undef SPAN_NEAREST
+#undef SPAN_LINEAR
+}
+
+
+
+/*
+ * Render an RGB/RGBA textured triangle without perspective correction.
+ */
+#define NAME affine_textured_triangle
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define INTERP_INT_TEX 1
+#define S_SCALE twidth
+#define T_SCALE theight
+
+#define SETUP_CODE \
+ struct affine_info info; \
+ struct gl_texture_unit *unit = ctx->Texture.Unit+0; \
+ const struct gl_texture_object *obj = \
+ ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \
+ const struct gl_texture_image *texImg = \
+ obj->Image[0][obj->BaseLevel]; \
+ const GLfloat twidth = (GLfloat) texImg->Width; \
+ const GLfloat theight = (GLfloat) texImg->Height; \
+ info.texture = (const GLchan *) texImg->Data; \
+ info.twidth_log2 = texImg->WidthLog2; \
+ info.smask = texImg->Width - 1; \
+ info.tmask = texImg->Height - 1; \
+ info.format = texImg->TexFormat; \
+ info.filter = obj->Sampler.MinFilter; \
+ info.envmode = unit->EnvMode; \
+ info.er = 0; \
+ info.eg = 0; \
+ info.eb = 0; \
+ span.arrayMask |= SPAN_RGBA; \
+ \
+ if (info.envmode == GL_BLEND) { \
+ /* potential off-by-one error here? (1.0f -> 2048 -> 0) */ \
+ info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF); \
+ info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF); \
+ info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF); \
+ info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF); \
+ } \
+ if (!info.texture) { \
+ /* this shouldn't happen */ \
+ return; \
+ } \
+ \
+ switch (info.format) { \
+ case MESA_FORMAT_RGB888: \
+ info.tbytesline = texImg->Width * 3; \
+ break; \
+ case MESA_FORMAT_RGBA8888: \
+ info.tbytesline = texImg->Width * 4; \
+ break; \
+ default: \
+ _mesa_problem(NULL, "Bad texture format in affine_texture_triangle");\
+ return; \
+ } \
+ info.tsize = texImg->Height * info.tbytesline;
+
+#define RENDER_SPAN( span ) affine_span(ctx, &span, &info);
+
+#include "s_tritemp.h"
+
+
+
+struct persp_info
+{
+ GLenum filter;
+ GLenum format;
+ GLenum envmode;
+ GLint smask, tmask;
+ GLint twidth_log2;
+ const GLchan *texture;
+ GLfixed er, eg, eb, ea; /* texture env color */
+ GLint tbytesline, tsize;
+};
+
+
+static INLINE void
+fast_persp_span(struct gl_context *ctx, SWspan *span,
+ struct persp_info *info)
+{
+ GLchan sample[4]; /* the filtered texture sample */
+
+ /* Instead of defining a function for each mode, a test is done
+ * between the outer and inner loops. This is to reduce code size
+ * and complexity. Observe that an optimizing compiler kills
+ * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST).
+ */
+#define SPAN_NEAREST(DO_TEX,COMP) \
+ for (i = 0; i < span->end; i++) { \
+ GLdouble invQ = tex_coord[2] ? \
+ (1.0 / tex_coord[2]) : 1.0; \
+ GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ); \
+ GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ); \
+ GLint s = IFLOOR(s_tmp) & info->smask; \
+ GLint t = IFLOOR(t_tmp) & info->tmask; \
+ GLint pos = (t << info->twidth_log2) + s; \
+ const GLchan *tex00 = info->texture + COMP * pos; \
+ DO_TEX; \
+ span->red += span->redStep; \
+ span->green += span->greenStep; \
+ span->blue += span->blueStep; \
+ span->alpha += span->alphaStep; \
+ tex_coord[0] += tex_step[0]; \
+ tex_coord[1] += tex_step[1]; \
+ tex_coord[2] += tex_step[2]; \
+ dest += 4; \
+ }
+
+#define SPAN_LINEAR(DO_TEX,COMP) \
+ for (i = 0; i < span->end; i++) { \
+ GLdouble invQ = tex_coord[2] ? \
+ (1.0 / tex_coord[2]) : 1.0; \
+ const GLfloat s_tmp = (GLfloat) (tex_coord[0] * invQ); \
+ const GLfloat t_tmp = (GLfloat) (tex_coord[1] * invQ); \
+ const GLfixed s_fix = FloatToFixed(s_tmp) - FIXED_HALF; \
+ const GLfixed t_fix = FloatToFixed(t_tmp) - FIXED_HALF; \
+ const GLint s = FixedToInt(FixedFloor(s_fix)) & info->smask; \
+ const GLint t = FixedToInt(FixedFloor(t_fix)) & info->tmask; \
+ const GLfixed sf = s_fix & FIXED_FRAC_MASK; \
+ const GLfixed tf = t_fix & FIXED_FRAC_MASK; \
+ const GLint pos = (t << info->twidth_log2) + s; \
+ const GLchan *tex00 = info->texture + COMP * pos; \
+ const GLchan *tex10 = tex00 + info->tbytesline; \
+ const GLchan *tex01 = tex00 + COMP; \
+ const GLchan *tex11 = tex10 + COMP; \
+ if (t == info->tmask) { \
+ tex10 -= info->tsize; \
+ tex11 -= info->tsize; \
+ } \
+ if (s == info->smask) { \
+ tex01 -= info->tbytesline; \
+ tex11 -= info->tbytesline; \
+ } \
+ DO_TEX; \
+ span->red += span->redStep; \
+ span->green += span->greenStep; \
+ span->blue += span->blueStep; \
+ span->alpha += span->alphaStep; \
+ tex_coord[0] += tex_step[0]; \
+ tex_coord[1] += tex_step[1]; \
+ tex_coord[2] += tex_step[2]; \
+ dest += 4; \
+ }
+
+ GLuint i;
+ GLfloat tex_coord[3], tex_step[3];
+ GLchan *dest = span->array->rgba[0];
+
+ const GLuint texEnableSave = ctx->Texture._EnabledCoordUnits;
+ ctx->Texture._EnabledCoordUnits = 0;
+
+ tex_coord[0] = span->attrStart[FRAG_ATTRIB_TEX0][0] * (info->smask + 1);
+ tex_step[0] = span->attrStepX[FRAG_ATTRIB_TEX0][0] * (info->smask + 1);
+ tex_coord[1] = span->attrStart[FRAG_ATTRIB_TEX0][1] * (info->tmask + 1);
+ tex_step[1] = span->attrStepX[FRAG_ATTRIB_TEX0][1] * (info->tmask + 1);
+ /* span->attrStart[FRAG_ATTRIB_TEX0][2] only if 3D-texturing, here only 2D */
+ tex_coord[2] = span->attrStart[FRAG_ATTRIB_TEX0][3];
+ tex_step[2] = span->attrStepX[FRAG_ATTRIB_TEX0][3];
+
+ switch (info->filter) {
+ case GL_NEAREST:
+ switch (info->format) {
+ case MESA_FORMAT_RGB888:
+ switch (info->envmode) {
+ case GL_MODULATE:
+ SPAN_NEAREST(NEAREST_RGB;MODULATE,3);
+ break;
+ case GL_DECAL:
+ case GL_REPLACE:
+ SPAN_NEAREST(NEAREST_RGB_REPLACE,3);
+ break;
+ case GL_BLEND:
+ SPAN_NEAREST(NEAREST_RGB;BLEND,3);
+ break;
+ case GL_ADD:
+ SPAN_NEAREST(NEAREST_RGB;ADD,3);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (5) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ case MESA_FORMAT_RGBA8888:
+ switch(info->envmode) {
+ case GL_MODULATE:
+ SPAN_NEAREST(NEAREST_RGBA;MODULATE,4);
+ break;
+ case GL_DECAL:
+ SPAN_NEAREST(NEAREST_RGBA;DECAL,4);
+ break;
+ case GL_BLEND:
+ SPAN_NEAREST(NEAREST_RGBA;BLEND,4);
+ break;
+ case GL_ADD:
+ SPAN_NEAREST(NEAREST_RGBA;ADD,4);
+ break;
+ case GL_REPLACE:
+ SPAN_NEAREST(NEAREST_RGBA_REPLACE,4);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (6) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ }
+ break;
+
+ case GL_LINEAR:
+ switch (info->format) {
+ case MESA_FORMAT_RGB888:
+ switch (info->envmode) {
+ case GL_MODULATE:
+ SPAN_LINEAR(LINEAR_RGB;MODULATE,3);
+ break;
+ case GL_DECAL:
+ case GL_REPLACE:
+ SPAN_LINEAR(LINEAR_RGB;REPLACE,3);
+ break;
+ case GL_BLEND:
+ SPAN_LINEAR(LINEAR_RGB;BLEND,3);
+ break;
+ case GL_ADD:
+ SPAN_LINEAR(LINEAR_RGB;ADD,3);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (7) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ case MESA_FORMAT_RGBA8888:
+ switch (info->envmode) {
+ case GL_MODULATE:
+ SPAN_LINEAR(LINEAR_RGBA;MODULATE,4);
+ break;
+ case GL_DECAL:
+ SPAN_LINEAR(LINEAR_RGBA;DECAL,4);
+ break;
+ case GL_BLEND:
+ SPAN_LINEAR(LINEAR_RGBA;BLEND,4);
+ break;
+ case GL_ADD:
+ SPAN_LINEAR(LINEAR_RGBA;ADD,4);
+ break;
+ case GL_REPLACE:
+ SPAN_LINEAR(LINEAR_RGBA;REPLACE,4);
+ break;
+ default:
+ _mesa_problem(ctx, "bad tex env mode (8) in SPAN_LINEAR");
+ return;
+ }
+ break;
+ }
+ break;
+ }
+
+ ASSERT(span->arrayMask & SPAN_RGBA);
+ _swrast_write_rgba_span(ctx, span);
+
+#undef SPAN_NEAREST
+#undef SPAN_LINEAR
+
+ /* restore state */
+ ctx->Texture._EnabledCoordUnits = texEnableSave;
+}
+
+
+/*
+ * Render an perspective corrected RGB/RGBA textured triangle.
+ * The Q (aka V in Mesa) coordinate must be zero such that the divide
+ * by interpolated Q/W comes out right.
+ *
+ */
+#define NAME persp_textured_triangle
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define INTERP_ATTRIBS 1
+
+#define SETUP_CODE \
+ struct persp_info info; \
+ const struct gl_texture_unit *unit = ctx->Texture.Unit+0; \
+ const struct gl_texture_object *obj = \
+ ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; \
+ const struct gl_texture_image *texImg = \
+ obj->Image[0][obj->BaseLevel]; \
+ info.texture = (const GLchan *) texImg->Data; \
+ info.twidth_log2 = texImg->WidthLog2; \
+ info.smask = texImg->Width - 1; \
+ info.tmask = texImg->Height - 1; \
+ info.format = texImg->TexFormat; \
+ info.filter = obj->Sampler.MinFilter; \
+ info.envmode = unit->EnvMode; \
+ info.er = 0; \
+ info.eg = 0; \
+ info.eb = 0; \
+ \
+ if (info.envmode == GL_BLEND) { \
+ /* potential off-by-one error here? (1.0f -> 2048 -> 0) */ \
+ info.er = FloatToFixed(unit->EnvColor[RCOMP] * CHAN_MAXF); \
+ info.eg = FloatToFixed(unit->EnvColor[GCOMP] * CHAN_MAXF); \
+ info.eb = FloatToFixed(unit->EnvColor[BCOMP] * CHAN_MAXF); \
+ info.ea = FloatToFixed(unit->EnvColor[ACOMP] * CHAN_MAXF); \
+ } \
+ if (!info.texture) { \
+ /* this shouldn't happen */ \
+ return; \
+ } \
+ \
+ switch (info.format) { \
+ case MESA_FORMAT_RGB888: \
+ info.tbytesline = texImg->Width * 3; \
+ break; \
+ case MESA_FORMAT_RGBA8888: \
+ info.tbytesline = texImg->Width * 4; \
+ break; \
+ default: \
+ _mesa_problem(NULL, "Bad texture format in persp_textured_triangle");\
+ return; \
+ } \
+ info.tsize = texImg->Height * info.tbytesline;
+
+#define RENDER_SPAN( span ) \
+ span.interpMask &= ~SPAN_RGBA; \
+ span.arrayMask |= SPAN_RGBA; \
+ fast_persp_span(ctx, &span, &info);
+
+#include "s_tritemp.h"
+
+#endif /*CHAN_TYPE != GL_FLOAT*/
+
+
+
+/*
+ * Render an RGBA triangle with arbitrary attributes.
+ */
+#define NAME general_triangle
+#define INTERP_Z 1
+#define INTERP_RGB 1
+#define INTERP_ALPHA 1
+#define INTERP_ATTRIBS 1
+#define RENDER_SPAN( span ) _swrast_write_rgba_span(ctx, &span);
+#include "s_tritemp.h"
+
+
+
+
+/*
+ * Special tri function for occlusion testing
+ */
+#define NAME occlusion_zless_triangle
+#define INTERP_Z 1
+#define SETUP_CODE \
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_DepthBuffer; \
+ struct gl_query_object *q = ctx->Query.CurrentOcclusionObject; \
+ ASSERT(ctx->Depth.Test); \
+ ASSERT(!ctx->Depth.Mask); \
+ ASSERT(ctx->Depth.Func == GL_LESS); \
+ if (!q) { \
+ return; \
+ }
+#define RENDER_SPAN( span ) \
+ if (rb->Format == MESA_FORMAT_Z16) { \
+ GLuint i; \
+ const GLushort *zRow = (const GLushort *) \
+ rb->GetPointer(ctx, rb, span.x, span.y); \
+ for (i = 0; i < span.end; i++) { \
+ GLuint z = FixedToDepth(span.z); \
+ if (z < zRow[i]) { \
+ q->Result++; \
+ } \
+ span.z += span.zStep; \
+ } \
+ } \
+ else { \
+ GLuint i; \
+ const GLuint *zRow = (const GLuint *) \
+ rb->GetPointer(ctx, rb, span.x, span.y); \
+ for (i = 0; i < span.end; i++) { \
+ if ((GLuint)span.z < zRow[i]) { \
+ q->Result++; \
+ } \
+ span.z += span.zStep; \
+ } \
+ }
+#include "s_tritemp.h"
+
+
+
+static void
+nodraw_triangle( struct gl_context *ctx,
+ const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2 )
+{
+ (void) (ctx && v0 && v1 && v2);
+}
+
+
+/*
+ * This is used when separate specular color is enabled, but not
+ * texturing. We add the specular color to the primary color,
+ * draw the triangle, then restore the original primary color.
+ * Inefficient, but seldom needed.
+ */
+void
+_swrast_add_spec_terms_triangle(struct gl_context *ctx, const SWvertex *v0,
+ const SWvertex *v1, const SWvertex *v2)
+{
+ SWvertex *ncv0 = (SWvertex *)v0; /* drop const qualifier */
+ SWvertex *ncv1 = (SWvertex *)v1;
+ SWvertex *ncv2 = (SWvertex *)v2;
+ GLfloat rSum, gSum, bSum;
+ GLchan cSave[3][4];
+
+ /* save original colors */
+ COPY_CHAN4( cSave[0], ncv0->color );
+ COPY_CHAN4( cSave[1], ncv1->color );
+ COPY_CHAN4( cSave[2], ncv2->color );
+ /* sum v0 */
+ rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0];
+ gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1];
+ bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2];
+ UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum);
+ /* sum v1 */
+ rSum = CHAN_TO_FLOAT(ncv1->color[0]) + ncv1->attrib[FRAG_ATTRIB_COL1][0];
+ gSum = CHAN_TO_FLOAT(ncv1->color[1]) + ncv1->attrib[FRAG_ATTRIB_COL1][1];
+ bSum = CHAN_TO_FLOAT(ncv1->color[2]) + ncv1->attrib[FRAG_ATTRIB_COL1][2];
+ UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[0], rSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[1], gSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[2], bSum);
+ /* sum v2 */
+ rSum = CHAN_TO_FLOAT(ncv2->color[0]) + ncv2->attrib[FRAG_ATTRIB_COL1][0];
+ gSum = CHAN_TO_FLOAT(ncv2->color[1]) + ncv2->attrib[FRAG_ATTRIB_COL1][1];
+ bSum = CHAN_TO_FLOAT(ncv2->color[2]) + ncv2->attrib[FRAG_ATTRIB_COL1][2];
+ UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[0], rSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[1], gSum);
+ UNCLAMPED_FLOAT_TO_CHAN(ncv2->color[2], bSum);
+ /* draw */
+ SWRAST_CONTEXT(ctx)->SpecTriangle( ctx, ncv0, ncv1, ncv2 );
+ /* restore original colors */
+ COPY_CHAN4( ncv0->color, cSave[0] );
+ COPY_CHAN4( ncv1->color, cSave[1] );
+ COPY_CHAN4( ncv2->color, cSave[2] );
+}
+
+
+
+#ifdef DEBUG
+
+/* record the current triangle function name */
+const char *_mesa_triFuncName = NULL;
+
+#define USE(triFunc) \
+do { \
+ _mesa_triFuncName = #triFunc; \
+ /*printf("%s\n", _mesa_triFuncName);*/ \
+ swrast->Triangle = triFunc; \
+} while (0)
+
+#else
+
+#define USE(triFunc) swrast->Triangle = triFunc;
+
+#endif
+
+
+
+
+/*
+ * Determine which triangle rendering function to use given the current
+ * rendering context.
+ *
+ * Please update the summary flag _SWRAST_NEW_TRIANGLE if you add or
+ * remove tests to this code.
+ */
+void
+_swrast_choose_triangle( struct gl_context *ctx )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ if (ctx->Polygon.CullFlag &&
+ ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) {
+ USE(nodraw_triangle);
+ return;
+ }
+
+ if (ctx->RenderMode==GL_RENDER) {
+
+ if (ctx->Polygon.SmoothFlag) {
+ _swrast_set_aa_triangle_function(ctx);
+ ASSERT(swrast->Triangle);
+ return;
+ }
+
+ /* special case for occlusion testing */
+ if (ctx->Query.CurrentOcclusionObject &&
+ ctx->Depth.Test &&
+ ctx->Depth.Mask == GL_FALSE &&
+ ctx->Depth.Func == GL_LESS &&
+ !ctx->Stencil._Enabled) {
+ if (ctx->Color.ColorMask[0][0] == 0 &&
+ ctx->Color.ColorMask[0][1] == 0 &&
+ ctx->Color.ColorMask[0][2] == 0 &&
+ ctx->Color.ColorMask[0][3] == 0) {
+ USE(occlusion_zless_triangle);
+ return;
+ }
+ }
+
+ /*
+ * XXX should examine swrast->_ActiveAttribMask to determine what
+ * needs to be interpolated.
+ */
+ if (ctx->Texture._EnabledCoordUnits ||
+ ctx->FragmentProgram._Current ||
+ ctx->ATIFragmentShader._Enabled ||
+ _mesa_need_secondary_color(ctx) ||
+ swrast->_FogEnabled) {
+ /* Ugh, we do a _lot_ of tests to pick the best textured tri func */
+ const struct gl_texture_object *texObj2D;
+ const struct gl_texture_image *texImg;
+ GLenum minFilter, magFilter, envMode;
+ gl_format format;
+ texObj2D = ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX];
+
+ texImg = texObj2D ? texObj2D->Image[0][texObj2D->BaseLevel] : NULL;
+ format = texImg ? texImg->TexFormat : MESA_FORMAT_NONE;
+ minFilter = texObj2D ? texObj2D->Sampler.MinFilter : GL_NONE;
+ magFilter = texObj2D ? texObj2D->Sampler.MagFilter : GL_NONE;
+ envMode = ctx->Texture.Unit[0].EnvMode;
+
+ /* First see if we can use an optimized 2-D texture function */
+ if (ctx->Texture._EnabledCoordUnits == 0x1
+ && !ctx->FragmentProgram._Current
+ && !ctx->ATIFragmentShader._Enabled
+ && ctx->Texture._EnabledUnits == 0x1
+ && ctx->Texture.Unit[0]._ReallyEnabled == TEXTURE_2D_BIT
+ && texObj2D->Sampler.WrapS == GL_REPEAT
+ && texObj2D->Sampler.WrapT == GL_REPEAT
+ && texObj2D->_Swizzle == SWIZZLE_NOOP
+ && texImg->_IsPowerOfTwo
+ && texImg->Border == 0
+ && texImg->Width == texImg->RowStride
+ && (format == MESA_FORMAT_RGB888 || format == MESA_FORMAT_RGBA8888)
+ && minFilter == magFilter
+ && ctx->Light.Model.ColorControl == GL_SINGLE_COLOR
+ && !swrast->_FogEnabled
+ && ctx->Texture.Unit[0].EnvMode != GL_COMBINE_EXT
+ && ctx->Texture.Unit[0].EnvMode != GL_COMBINE4_NV) {
+ if (ctx->Hint.PerspectiveCorrection==GL_FASTEST) {
+ if (minFilter == GL_NEAREST
+ && format == MESA_FORMAT_RGB888
+ && (envMode == GL_REPLACE || envMode == GL_DECAL)
+ && ((swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)
+ && ctx->Depth.Func == GL_LESS
+ && ctx->Depth.Mask == GL_TRUE)
+ || swrast->_RasterMask == TEXTURE_BIT)
+ && ctx->Polygon.StippleFlag == GL_FALSE
+ && ctx->DrawBuffer->Visual.depthBits <= 16) {
+ if (swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)) {
+ USE(simple_z_textured_triangle);
+ }
+ else {
+ USE(simple_textured_triangle);
+ }
+ }
+ else {
+#if CHAN_BITS != 8
+ USE(general_triangle);
+#else
+ if (format == MESA_FORMAT_RGBA8888 && !_mesa_little_endian()) {
+ /* We only handle RGBA8888 correctly on little endian
+ * in the optimized code above.
+ */
+ USE(general_triangle);
+ }
+ else {
+ USE(affine_textured_triangle);
+ }
+#endif
+ }
+ }
+ else {
+#if CHAN_BITS != 8
+ USE(general_triangle);
+#else
+ USE(persp_textured_triangle);
+#endif
+ }
+ }
+ else {
+ /* general case textured triangles */
+ USE(general_triangle);
+ }
+ }
+ else {
+ ASSERT(!swrast->_FogEnabled);
+ ASSERT(!_mesa_need_secondary_color(ctx));
+ if (ctx->Light.ShadeModel==GL_SMOOTH) {
+ /* smooth shaded, no texturing, stippled or some raster ops */
+#if CHAN_BITS != 8
+ USE(general_triangle);
+#else
+ USE(smooth_rgba_triangle);
+#endif
+ }
+ else {
+ /* flat shaded, no texturing, stippled or some raster ops */
+#if CHAN_BITS != 8
+ USE(general_triangle);
+#else
+ USE(flat_rgba_triangle);
+#endif
+ }
+ }
+ }
+ else if (ctx->RenderMode==GL_FEEDBACK) {
+ USE(_swrast_feedback_triangle);
+ }
+ else {
+ /* GL_SELECT mode */
+ USE(_swrast_select_triangle);
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 00:56:38 +0000