From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- nx-X11/extras/Mesa/src/mesa/swrast/s_accum.c | 584 +++++++++++++++++++++++++++ 1 file changed, 584 insertions(+) create mode 100644 nx-X11/extras/Mesa/src/mesa/swrast/s_accum.c (limited to 'nx-X11/extras/Mesa/src/mesa/swrast/s_accum.c') diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_accum.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_accum.c new file mode 100644 index 000000000..5621d0c8a --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_accum.c @@ -0,0 +1,584 @@ +/* + * Mesa 3-D graphics library + * Version: 6.3 + * + * Copyright (C) 1999-2005 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 "glheader.h" +#include "context.h" +#include "macros.h" +#include "imports.h" +#include "fbobject.h" + +#include "s_accum.h" +#include "s_context.h" +#include "s_masking.h" +#include "s_span.h" + + +#define ACCUM_SCALE16 32767.0 + + +/* + * 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 && ACCUM_BITS <= 32 +/* 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( GLcontext *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( GLcontext *ctx, struct gl_renderbuffer *rb ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + GLuint x, y, width, height; + + if (ctx->Visual.accumRedBits == 0) { + /* No accumulation buffer! Not an error. */ + return; + } + + assert(rb); + 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(GLcontext *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(GLcontext *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(GLcontext *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); + + _swrast_use_read_buffer(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, 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 */ + } + + _swrast_use_draw_buffer(ctx); +} + + + +static void +accum_load(GLcontext *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; + } + + _swrast_use_read_buffer(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, 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); + } + } + } + else { + /* other types someday */ + } + + _swrast_use_draw_buffer(ctx); +} + + +static void +accum_return(GLcontext *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); + const GLboolean masking = (!ctx->Color.ColorMask[RCOMP] || + !ctx->Color.ColorMask[GCOMP] || + !ctx->Color.ColorMask[BCOMP] || + !ctx->Color.ColorMask[ACOMP]); + + 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, i; + + /* XXX maybe transpose the 'i' and 'buffer' loops??? */ + for (i = 0; i < height; i++) { + GLchan rgba[MAX_WIDTH][4]; + GLshort accumRow[4 * MAX_WIDTH]; + GLshort *acc; + + 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); + rgba[j][RCOMP] = multTable[acc[j * 4 + 0]]; + rgba[j][GCOMP] = multTable[acc[j * 4 + 1]]; + rgba[j][BCOMP] = multTable[acc[j * 4 + 2]]; + rgba[j][ACOMP] = multTable[acc[j * 4 + 3]]; + } + } + else { + /* scaled integer (or float) accum buffer */ + GLint j; + for (j = 0; j < width; j++) { + 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 ); + rgba[j][RCOMP] = CLAMP( r, 0, CHAN_MAX ); + rgba[j][GCOMP] = CLAMP( g, 0, CHAN_MAX ); + rgba[j][BCOMP] = CLAMP( b, 0, CHAN_MAX ); + rgba[j][ACOMP] = CLAMP( a, 0, CHAN_MAX ); + } + } + + /* store colors */ + for (buffer = 0; buffer < fb->_NumColorDrawBuffers[0]; buffer++) { + struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[0][buffer]; + if (masking) { + _swrast_mask_rgba_array(ctx, rb, width, xpos, ypos + i, rgba); + } + rb->PutRow(ctx, rb, width, xpos, ypos + i, rgba, NULL); + } + } + } + else { + /* other types someday */ + } +} + + + +/** + * Software fallback for glAccum. + */ +void +_swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value, + GLint xpos, GLint ypos, + GLint width, GLint height ) + +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + if (SWRAST_CONTEXT(ctx)->NewState) + _swrast_validate_derived( ctx ); + + if (!ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer) { + _mesa_warning(ctx, "Calling glAccum() without an accumulation buffer"); + return; + } + + RENDER_START(swrast, ctx); + + 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; + } + + RENDER_FINISH(swrast, ctx); +} -- cgit v1.2.3