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authorReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
committerReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
commitf4092abdf94af6a99aff944d6264bc1284e8bdd4 (patch)
tree2ac1c9cc16ceb93edb2c4382c088dac5aeafdf0f /nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c
parenta840692edc9c6d19cd7c057f68e39c7d95eb767d (diff)
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Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1
Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c')
-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c1007
1 files changed, 1007 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c
new file mode 100644
index 000000000..b6aa77757
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c
@@ -0,0 +1,1007 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.4
+ *
+ * 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 "bufferobj.h"
+#include "context.h"
+#include "convolve.h"
+#include "image.h"
+#include "macros.h"
+#include "imports.h"
+#include "pixel.h"
+
+#include "s_context.h"
+#include "s_drawpix.h"
+#include "s_pixeltex.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_pixels(GLcontext *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);
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
+ struct sw_span span;
+
+ INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
+
+ if (!ctx->Current.RasterPosValid) {
+ return GL_TRUE; /* no-op */
+ }
+
+ if (swrast->_RasterMask & MULTI_DRAW_BIT)
+ return GL_FALSE;
+
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(ctx, &span);
+
+ if ((SWRAST_CONTEXT(ctx)->_RasterMask & ~CLIP_BIT) == 0
+ && ctx->Texture._EnabledCoordUnits == 0
+ && unpack->Alignment == 1
+ && !unpack->SwapBytes
+ && !unpack->LsbFirst) {
+
+ GLint destX = x;
+ GLint destY = y;
+ GLint drawWidth = width; /* actual width drawn */
+ GLint drawHeight = height; /* actual height drawn */
+ GLint skipPixels = unpack->SkipPixels;
+ GLint skipRows = unpack->SkipRows;
+ GLint rowLength;
+ GLint zoomY0 = 0;
+
+ if (unpack->RowLength > 0)
+ rowLength = unpack->RowLength;
+ else
+ rowLength = width;
+
+ /* If we're not using pixel zoom then do all clipping calculations
+ * now. Otherwise, we'll let the _swrast_write_zoomed_*_span() functions
+ * handle the clipping.
+ */
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ /* horizontal clipping */
+ if (destX < ctx->DrawBuffer->_Xmin) {
+ skipPixels += (ctx->DrawBuffer->_Xmin - destX);
+ drawWidth -= (ctx->DrawBuffer->_Xmin - destX);
+ destX = ctx->DrawBuffer->_Xmin;
+ }
+ if (destX + drawWidth > ctx->DrawBuffer->_Xmax)
+ drawWidth -= (destX + drawWidth - ctx->DrawBuffer->_Xmax);
+ if (drawWidth <= 0)
+ return GL_TRUE;
+
+ /* vertical clipping */
+ if (destY < ctx->DrawBuffer->_Ymin) {
+ skipRows += (ctx->DrawBuffer->_Ymin - destY);
+ drawHeight -= (ctx->DrawBuffer->_Ymin - destY);
+ destY = ctx->DrawBuffer->_Ymin;
+ }
+ if (destY + drawHeight > ctx->DrawBuffer->_Ymax)
+ drawHeight -= (destY + drawHeight - ctx->DrawBuffer->_Ymax);
+ if (drawHeight <= 0)
+ return GL_TRUE;
+ }
+ else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
+ /* upside-down image */
+ /* horizontal clipping */
+ if (destX < ctx->DrawBuffer->_Xmin) {
+ skipPixels += (ctx->DrawBuffer->_Xmin - destX);
+ drawWidth -= (ctx->DrawBuffer->_Xmin - destX);
+ destX = ctx->DrawBuffer->_Xmin;
+ }
+ if (destX + drawWidth > ctx->DrawBuffer->_Xmax)
+ drawWidth -= (destX + drawWidth - ctx->DrawBuffer->_Xmax);
+ if (drawWidth <= 0)
+ return GL_TRUE;
+
+ /* vertical clipping */
+ if (destY > ctx->DrawBuffer->_Ymax) {
+ skipRows += (destY - ctx->DrawBuffer->_Ymax);
+ drawHeight -= (destY - ctx->DrawBuffer->_Ymax);
+ destY = ctx->DrawBuffer->_Ymax;
+ }
+ if (destY - drawHeight < ctx->DrawBuffer->_Ymin)
+ drawHeight -= (ctx->DrawBuffer->_Ymin - (destY - drawHeight));
+ if (drawHeight <= 0)
+ return GL_TRUE;
+ }
+ else {
+ if (drawWidth > MAX_WIDTH)
+ return GL_FALSE; /* fall back to general case path */
+
+ /* save Y value of first row */
+ zoomY0 = IROUND(ctx->Current.RasterPos[1]);
+ }
+
+
+ /*
+ * Ready to draw!
+ * The window region at (destX, destY) of size (drawWidth, drawHeight)
+ * will be written to.
+ * We'll take pixel data from buffer pointed to by "pixels" but we'll
+ * skip "skipRows" rows and skip "skipPixels" pixels/row.
+ */
+
+ if (format == GL_RGBA && type == CHAN_TYPE
+ && ctx->_ImageTransferState==0) {
+ if (ctx->Visual.rgbMode) {
+ GLchan *src = (GLchan *) pixels
+ + (skipRows * rowLength + skipPixels) * 4;
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ /* no zooming */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ rb->PutRow(ctx, rb, drawWidth, destX, destY, src, NULL);
+ src += rowLength * 4;
+ destY++;
+ }
+ }
+ else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
+ /* upside-down */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ destY--;
+ rb->PutRow(ctx, rb, drawWidth, destX, destY, src, NULL);
+ src += rowLength * 4;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4]) src, zoomY0, 0);
+ src += rowLength * 4;
+ destY++;
+ }
+ }
+ }
+ return GL_TRUE;
+ }
+ else if (format == GL_RGB && type == CHAN_TYPE
+ && ctx->_ImageTransferState == 0) {
+ if (ctx->Visual.rgbMode) {
+ GLchan *src = (GLchan *) pixels
+ + (skipRows * rowLength + skipPixels) * 3;
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, src, NULL);
+ src += rowLength * 3;
+ destY++;
+ }
+ }
+ else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
+ /* upside-down */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ destY--;
+ rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, src, NULL);
+ src += rowLength * 3;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgb_span(ctx, &span,
+ (CONST GLchan (*)[3]) src, zoomY0, 0);
+ src += rowLength * 3;
+ destY++;
+ }
+ }
+ }
+ return GL_TRUE;
+ }
+ else if (format == GL_LUMINANCE && type == CHAN_TYPE
+ && ctx->_ImageTransferState==0) {
+ if (ctx->Visual.rgbMode) {
+ GLchan *src = (GLchan *) pixels
+ + (skipRows * rowLength + skipPixels);
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ /* no zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row=0; row<drawHeight; row++) {
+ GLint i;
+ for (i=0;i<drawWidth;i++) {
+ span.array->rgb[i][0] = src[i];
+ span.array->rgb[i][1] = src[i];
+ span.array->rgb[i][2] = src[i];
+ }
+ rb->PutRowRGB(ctx, rb, drawWidth, destX, destY,
+ span.array->rgb, NULL);
+ src += rowLength;
+ destY++;
+ }
+ }
+ else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
+ /* upside-down */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row=0; row<drawHeight; row++) {
+ GLint i;
+ for (i=0;i<drawWidth;i++) {
+ span.array->rgb[i][0] = src[i];
+ span.array->rgb[i][1] = src[i];
+ span.array->rgb[i][2] = src[i];
+ }
+ destY--;
+ rb->PutRow(ctx, rb, drawWidth, destX, destY,
+ span.array->rgb, NULL);
+ src += rowLength;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row=0; row<drawHeight; row++) {
+ GLint i;
+ for (i=0;i<drawWidth;i++) {
+ span.array->rgb[i][0] = src[i];
+ span.array->rgb[i][1] = src[i];
+ span.array->rgb[i][2] = src[i];
+ }
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgb_span(ctx, &span,
+ (CONST GLchan (*)[3]) span.array->rgb, zoomY0, 0);
+ src += rowLength;
+ destY++;
+ }
+ }
+ }
+ return GL_TRUE;
+ }
+ else if (format == GL_LUMINANCE_ALPHA && type == CHAN_TYPE
+ && ctx->_ImageTransferState == 0) {
+ if (ctx->Visual.rgbMode) {
+ GLchan *src = (GLchan *) pixels
+ + (skipRows * rowLength + skipPixels)*2;
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ /* no zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row=0; row<drawHeight; row++) {
+ GLint i;
+ 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 += rowLength*2;
+ destY++;
+ }
+ }
+ else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
+ /* upside-down */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row=0; row<drawHeight; row++) {
+ GLint i;
+ 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++;
+ }
+ destY--;
+ rb->PutRow(ctx, rb, drawWidth, destX, destY,
+ span.array->rgba, NULL);
+ src += rowLength*2;
+ }
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ ASSERT(drawWidth <= MAX_WIDTH);
+ for (row=0; row<drawHeight; row++) {
+ 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, &span,
+ (CONST GLchan (*)[4]) span.array->rgba, zoomY0, 0);
+ src += rowLength*2;
+ destY++;
+ }
+ }
+ }
+ return GL_TRUE;
+ }
+ else if (format==GL_COLOR_INDEX && type==GL_UNSIGNED_BYTE) {
+ GLubyte *src = (GLubyte *) pixels + skipRows * rowLength + skipPixels;
+ if (ctx->Visual.rgbMode) {
+ /* convert CI data to RGBA */
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ /* no zooming */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ ASSERT(drawWidth <= MAX_WIDTH);
+ _mesa_map_ci8_to_rgba(ctx, drawWidth, src, span.array->rgba);
+ rb->PutRow(ctx, rb, drawWidth, destX, destY,
+ span.array->rgba, NULL);
+ src += rowLength;
+ destY++;
+ }
+ return GL_TRUE;
+ }
+ else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
+ /* upside-down */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ ASSERT(drawWidth <= MAX_WIDTH);
+ _mesa_map_ci8_to_rgba(ctx, drawWidth, src, span.array->rgba);
+ destY--;
+ rb->PutRow(ctx, rb, drawWidth, destX, destY,
+ span.array->rgba, NULL);
+ src += rowLength;
+ }
+ return GL_TRUE;
+ }
+ else {
+ /* with zooming */
+ GLint row;
+ for (row=0; row<drawHeight; row++) {
+ ASSERT(drawWidth <= MAX_WIDTH);
+ _mesa_map_ci8_to_rgba(ctx, drawWidth, src, span.array->rgba);
+ span.x = destX;
+ span.y = destY;
+ span.end = drawWidth;
+ _swrast_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4]) span.array->rgba, zoomY0, 0);
+ src += rowLength;
+ destY++;
+ }
+ return GL_TRUE;
+ }
+ }
+ else if (ctx->_ImageTransferState==0) {
+ /* write CI data to CI frame buffer */
+ GLint row;
+ if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
+ /* no zooming */
+ for (row=0; row<drawHeight; row++) {
+ GLuint index32[MAX_WIDTH];
+ GLint col;
+ for (col = 0; col < drawWidth; col++)
+ index32[col] = src[col];
+ rb->PutRow(ctx, rb, drawWidth, destX, destY, index32, NULL);
+ src += rowLength;
+ destY++;
+ }
+ return GL_TRUE;
+ }
+ else {
+ /* with zooming */
+ return GL_FALSE;
+ }
+ }
+ }
+ else {
+ /* can't handle this pixel format and/or data type here */
+ return GL_FALSE;
+ }
+ }
+
+ /* can't do a simple draw, have to use slow path */
+ return GL_FALSE;
+}
+
+
+
+/*
+ * Draw color index image.
+ */
+static void
+draw_index_pixels( GLcontext *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
+ GLint row, skipPixels;
+ struct sw_span span;
+
+ INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_INDEX);
+
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+
+ /*
+ * General solution
+ */
+ skipPixels = 0;
+ while (skipPixels < width) {
+ const GLint spanX = x + (zoom ? 0 : skipPixels);
+ GLint spanY = y;
+ const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
+ ? MAX_WIDTH : (width - skipPixels);
+ ASSERT(spanEnd <= MAX_WIDTH);
+ for (row = 0; row < height; row++, spanY++) {
+ const GLvoid *source = _mesa_image_address2d(unpack, pixels,
+ width, height,
+ GL_COLOR_INDEX, type,
+ row, skipPixels);
+ _mesa_unpack_index_span(ctx, spanEnd, GL_UNSIGNED_INT,
+ span.array->index, type, source, unpack,
+ ctx->_ImageTransferState);
+
+ /* These may get changed during writing/clipping */
+ span.x = spanX;
+ span.y = spanY;
+ span.end = spanEnd;
+
+ if (zoom)
+ _swrast_write_zoomed_index_span(ctx, &span, y, skipPixels);
+ else
+ _swrast_write_index_span(ctx, &span);
+ }
+ skipPixels += spanEnd;
+ }
+}
+
+
+
+/*
+ * Draw stencil image.
+ */
+static void
+draw_stencil_pixels( GLcontext *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;
+ const GLint desty = y;
+ GLint row, skipPixels;
+
+ if (type != GL_BYTE &&
+ type != GL_UNSIGNED_BYTE &&
+ type != GL_SHORT &&
+ type != GL_UNSIGNED_SHORT &&
+ type != GL_INT &&
+ type != GL_UNSIGNED_INT &&
+ type != GL_FLOAT &&
+ type != GL_BITMAP) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glDrawPixels(stencil type)");
+ return;
+ }
+
+ if (ctx->Visual.stencilBits == 0) {
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glDrawPixels(no stencil buffer)");
+ return;
+ }
+
+ /* if width > MAX_WIDTH, have to process image in chunks */
+ skipPixels = 0;
+ while (skipPixels < width) {
+ const GLint spanX = x;
+ GLint spanY = y;
+ const GLint spanWidth = (width - skipPixels > MAX_WIDTH)
+ ? MAX_WIDTH : (width - skipPixels);
+
+ for (row = 0; row < height; row++, spanY++) {
+ 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_COLOR_INDEX, type,
+ row, skipPixels);
+ _mesa_unpack_index_span(ctx, spanWidth, destType, values,
+ type, source, unpack,
+ ctx->_ImageTransferState);
+ if (ctx->_ImageTransferState & IMAGE_SHIFT_OFFSET_BIT) {
+ _mesa_shift_and_offset_stencil(ctx, spanWidth, values);
+ }
+ if (ctx->Pixel.MapStencilFlag) {
+ _mesa_map_stencil(ctx, spanWidth, values);
+ }
+
+ if (zoom) {
+ _swrast_write_zoomed_stencil_span(ctx, (GLuint) spanWidth,
+ spanX, spanY, values, desty, 0);
+ }
+ else {
+ _swrast_write_stencil_span(ctx, spanWidth, spanX, spanY, values);
+ }
+ }
+ skipPixels += spanWidth;
+ }
+}
+
+
+/*
+ * Draw depth image.
+ */
+static void
+draw_depth_pixels( GLcontext *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLboolean bias_or_scale = ctx->Pixel.DepthBias!=0.0 || ctx->Pixel.DepthScale!=1.0;
+ const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
+ const GLint desty = y;
+ struct sw_span span;
+
+ INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_Z);
+
+ if (type != GL_BYTE
+ && type != GL_UNSIGNED_BYTE
+ && type != GL_SHORT
+ && type != GL_UNSIGNED_SHORT
+ && type != GL_INT
+ && type != GL_UNSIGNED_INT
+ && type != GL_FLOAT) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glDrawPixels(type)");
+ return;
+ }
+
+ _swrast_span_default_color(ctx, &span);
+
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(ctx, &span);
+
+ if (type == GL_UNSIGNED_SHORT
+ && ctx->Visual.depthBits == 16
+ && !bias_or_scale
+ && !zoom
+ && ctx->Visual.rgbMode
+ && width <= MAX_WIDTH) {
+ /* Special case: directly write 16-bit depth values */
+ GLint row, spanY = y;
+ for (row = 0; row < height; row++, spanY++) {
+ 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 = spanY;
+ span.end = width;
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+ else if (type == GL_UNSIGNED_INT
+ && sizeof(GLdepth) == 4
+ && !bias_or_scale
+ && !zoom
+ && ctx->Visual.rgbMode
+ && width <= MAX_WIDTH) {
+ /* Special case: shift 32-bit values down to ctx->Visual.depthBits */
+ const GLint shift = 32 - ctx->Visual.depthBits;
+ GLint row, spanY = y;
+ for (row = 0; row < height; row++, spanY++) {
+ 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(GLdepth));
+ }
+ else {
+ GLint col;
+ for (col = 0; col < width; col++)
+ span.array->z[col] = zSrc[col] >> shift;
+ }
+ span.x = x;
+ span.y = spanY;
+ span.end = width;
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+ else {
+ /* General case */
+ const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
+ GLint row, skipPixels = 0;
+
+ /* in case width > MAX_WIDTH do the copy in chunks */
+ while (skipPixels < width) {
+ const GLint spanX = x + (zoom ? 0 : skipPixels);
+ GLint spanY = y;
+ const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
+ ? MAX_WIDTH : (width - skipPixels);
+ ASSERT(span.end <= MAX_WIDTH);
+ for (row = 0; row < height; row++, spanY++) {
+ GLfloat floatSpan[MAX_WIDTH];
+ 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 = spanX;
+ span.y = spanY;
+ span.end = spanEnd;
+
+ _mesa_unpack_depth_span(ctx, span.end, floatSpan, type,
+ zSrc, unpack);
+ /* clamp depth values to [0,1] and convert from floats to ints */
+ {
+ GLuint i;
+ for (i = 0; i < span.end; i++) {
+ span.array->z[i] = (GLdepth) (floatSpan[i] * depthMax);
+ }
+ }
+ if (zoom) {
+ _swrast_write_zoomed_depth_span(ctx, &span, desty, skipPixels);
+ }
+ else if (ctx->Visual.rgbMode) {
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ else {
+ _swrast_write_index_span(ctx, &span);
+ }
+ }
+ skipPixels += spanEnd;
+ }
+ }
+}
+
+
+
+/*
+ * Draw RGBA image.
+ */
+static void
+draw_rgba_pixels( GLcontext *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);
+ struct gl_renderbuffer *rb = NULL; /* only used for quickDraw path */
+ const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
+ const GLint desty = y;
+ GLboolean quickDraw;
+ GLfloat *convImage = NULL;
+ GLuint transferOps = ctx->_ImageTransferState;
+ struct sw_span span;
+
+ INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
+
+ if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glDrawPixels(format or type)");
+ return;
+ }
+
+ /* Try an optimized glDrawPixels first */
+ if (fast_draw_pixels(ctx, x, y, width, height, format, type, unpack, pixels))
+ return;
+
+ if (ctx->Depth.Test)
+ _swrast_span_default_z(ctx, &span);
+ if (swrast->_FogEnabled)
+ _swrast_span_default_fog(ctx, &span);
+ if (ctx->Texture._EnabledCoordUnits)
+ _swrast_span_default_texcoords(ctx, &span);
+
+ if (SWRAST_CONTEXT(ctx)->_RasterMask == 0 && !zoom && x >= 0 && y >= 0
+ && x + width <= (GLint) ctx->DrawBuffer->Width
+ && y + height <= (GLint) ctx->DrawBuffer->Height
+ && ctx->DrawBuffer->_NumColorDrawBuffers[0] == 1) {
+ quickDraw = GL_TRUE;
+ rb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
+ }
+ else {
+ quickDraw = GL_FALSE;
+ rb = NULL;
+ }
+
+ if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
+ /* Convolution has to be handled specially. We'll create an
+ * intermediate image, applying all pixel transfer operations
+ * up to convolution. Then we'll convolve the image. Then
+ * we'll proceed with the rest of the transfer operations and
+ * rasterize the image.
+ */
+ GLint row;
+ GLfloat *dest, *tmpImage;
+
+ tmpImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
+ if (!tmpImage) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
+ return;
+ }
+ convImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
+ if (!convImage) {
+ _mesa_free(tmpImage);
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
+ return;
+ }
+
+ /* Unpack the image and apply transfer ops up to convolution */
+ dest = tmpImage;
+ for (row = 0; row < height; row++) {
+ const GLvoid *source = _mesa_image_address2d(unpack,
+ pixels, width, height, format, type, row, 0);
+ _mesa_unpack_color_span_float(ctx, width, GL_RGBA, (GLfloat *) dest,
+ format, type, source, unpack,
+ transferOps & IMAGE_PRE_CONVOLUTION_BITS);
+ dest += width * 4;
+ }
+
+ /* do convolution */
+ if (ctx->Pixel.Convolution2DEnabled) {
+ _mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage);
+ }
+ else {
+ ASSERT(ctx->Pixel.Separable2DEnabled);
+ _mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage);
+ }
+ _mesa_free(tmpImage);
+
+ /* continue transfer ops and draw the convolved image */
+ unpack = &ctx->DefaultPacking;
+ pixels = convImage;
+ format = GL_RGBA;
+ type = GL_FLOAT;
+ transferOps &= IMAGE_POST_CONVOLUTION_BITS;
+ }
+
+ /*
+ * General solution
+ */
+ {
+ const GLuint interpMask = span.interpMask;
+ const GLuint arrayMask = span.arrayMask;
+ GLint row, skipPixels = 0;
+
+ /* if the span is wider than MAX_WIDTH we have to do it in chunks */
+ while (skipPixels < width) {
+ const GLint spanX = x + (zoom ? 0 : skipPixels);
+ GLint spanY = y;
+ const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
+ ? MAX_WIDTH : (width - skipPixels);
+ ASSERT(span.end <= MAX_WIDTH);
+
+ for (row = 0; row < height; row++, spanY++) {
+ const GLvoid *source = _mesa_image_address2d(unpack,
+ pixels, width, height, format, type, row, skipPixels);
+
+ /* Set these for each row since the _swrast_write_* function may
+ * change them while clipping.
+ */
+ span.x = spanX;
+ span.y = spanY;
+ span.end = spanEnd;
+ span.arrayMask = arrayMask;
+ span.interpMask = interpMask;
+
+ _mesa_unpack_color_span_chan(ctx, span.end, GL_RGBA,
+ (GLchan *) span.array->rgba,
+ format, type, source, unpack,
+ transferOps);
+
+ if ((ctx->Pixel.MinMaxEnabled && ctx->MinMax.Sink) ||
+ (ctx->Pixel.HistogramEnabled && ctx->Histogram.Sink))
+ continue;
+
+ if (ctx->Pixel.PixelTextureEnabled && ctx->Texture._EnabledUnits) {
+ _swrast_pixel_texture(ctx, &span);
+ }
+
+ /* draw the span */
+ if (quickDraw) {
+ rb->PutRow(ctx, rb, span.end, span.x, span.y,
+ span.array->rgba, NULL);
+ }
+ else if (zoom) {
+ _swrast_write_zoomed_rgba_span(ctx, &span,
+ (CONST GLchan (*)[4]) span.array->rgba, desty, skipPixels);
+ }
+ else {
+ _swrast_write_rgba_span(ctx, &span);
+ }
+ }
+
+ skipPixels += spanEnd;
+ }
+ }
+
+ if (convImage) {
+ _mesa_free(convImage);
+ }
+}
+
+
+
+/*
+ * Execute glDrawPixels
+ */
+void
+_swrast_DrawPixels( GLcontext *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);
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ if (unpack->BufferObj->Name) {
+ /* unpack from PBO */
+ GLubyte *buf;
+ if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
+ format, type, pixels)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glDrawPixels(invalid PBO access)");
+ return;
+ }
+ buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+ GL_READ_ONLY_ARB,
+ unpack->BufferObj);
+ if (!buf) {
+ /* buffer is already mapped - that's an error */
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(PBO is mapped)");
+ return;
+ }
+ pixels = ADD_POINTERS(buf, pixels);
+ }
+
+ RENDER_START(swrast,ctx);
+
+ 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_COLOR_INDEX:
+ if (ctx->Visual.rgbMode)
+ draw_rgba_pixels(ctx, x,y, width, height, format, type, unpack, pixels);
+ else
+ draw_index_pixels(ctx, x, y, width, height, type, unpack, pixels);
+ break;
+ case GL_RED:
+ case GL_GREEN:
+ case GL_BLUE:
+ case GL_ALPHA:
+ case GL_LUMINANCE:
+ case GL_LUMINANCE_ALPHA:
+ case GL_RGB:
+ case GL_BGR:
+ case GL_RGBA:
+ case GL_BGRA:
+ case GL_ABGR_EXT:
+ draw_rgba_pixels(ctx, x, y, width, height, format, type, unpack, pixels);
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glDrawPixels(format)" );
+ /* don't return yet, clean-up */
+ }
+
+ RENDER_FINISH(swrast,ctx);
+
+ if (unpack->BufferObj->Name) {
+ /* done with PBO so unmap it now */
+ ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+ unpack->BufferObj);
+ }
+}
+
+
+
+#if 0 /* experimental */
+/*
+ * Execute glDrawDepthPixelsMESA().
+ */
+void
+_swrast_DrawDepthPixelsMESA( GLcontext *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum colorFormat, GLenum colorType,
+ const GLvoid *colors,
+ GLenum depthType, const GLvoid *depths,
+ const struct gl_pixelstore_attrib *unpack )
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ if (swrast->NewState)
+ _swrast_validate_derived( ctx );
+
+ RENDER_START(swrast,ctx);
+
+ switch (colorFormat) {
+ case GL_COLOR_INDEX:
+ if (ctx->Visual.rgbMode)
+ draw_rgba_pixels(ctx, x,y, width, height, colorFormat, colorType, unpack, colors);
+ else
+ draw_index_pixels(ctx, x, y, width, height, colorType, unpack, colors);
+ break;
+ case GL_RED:
+ case GL_GREEN:
+ case GL_BLUE:
+ case GL_ALPHA:
+ case GL_LUMINANCE:
+ case GL_LUMINANCE_ALPHA:
+ case GL_RGB:
+ case GL_BGR:
+ case GL_RGBA:
+ case GL_BGRA:
+ case GL_ABGR_EXT:
+ draw_rgba_pixels(ctx, x, y, width, height, colorFormat, colorType, unpack, colors);
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM,
+ "glDrawDepthPixelsMESA(colorFormat)" );
+ }
+
+ RENDER_FINISH(swrast,ctx);
+}
+#endif