-/* $Id: s_readpix.c,v 1.9 2001/03/07 05:06:12 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.5
- *
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
- *
+ * Version: 6.1
+ *
+ * Copyright (C) 1999-2004 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
#include "feedback.h"
#include "image.h"
#include "macros.h"
-#include "mem.h"
+#include "imports.h"
#include "pixel.h"
#include "s_alphabuf.h"
GLenum type, GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLint i, readWidth;
/* error checking */
return;
}
- ASSERT(ctx->Driver.SetReadBuffer);
- (*ctx->Driver.SetReadBuffer)(ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer);
+ 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_OPERATION, "glReadPixels(index type)");
+ return;
+ }
+
+ _swrast_use_read_buffer(ctx);
readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
GLuint index[MAX_WIDTH];
GLvoid *dest;
- (*ctx->Driver.ReadCI32Span)(ctx, readWidth, x, y + i, index);
+ (*swrast->Driver.ReadCI32Span)(ctx, readWidth, x, y + i, index);
dest = _mesa_image_address(packing, pixels, width, height,
GL_COLOR_INDEX, type, 0, i, 0);
&ctx->Pack, ctx->_ImageTransferState);
}
- (*ctx->Driver.SetReadBuffer)(ctx, ctx->DrawBuffer,
- ctx->Color.DriverDrawBuffer);
+ _swrast_use_draw_buffer(ctx);
}
GLushort *dst = (GLushort*) _mesa_image_address( packing, pixels,
width, height, GL_DEPTH_COMPONENT, type, 0, j, 0 );
GLint i;
- _mesa_read_depth_span(ctx, width, x, y, depth);
+ _swrast_read_depth_span(ctx, width, x, y, depth);
for (i = 0; i < width; i++)
dst[i] = depth[i];
}
for (j=0;j<height;j++,y++) {
GLdepth *dst = (GLdepth *) _mesa_image_address( packing, pixels,
width, height, GL_DEPTH_COMPONENT, type, 0, j, 0 );
- _mesa_read_depth_span(ctx, width, x, y, dst);
+ _swrast_read_depth_span(ctx, width, x, y, dst);
}
}
else {
GLfloat depth[MAX_WIDTH];
GLvoid *dest;
- _mesa_read_depth_span_float(ctx, readWidth, x, y, depth);
+ _swrast_read_depth_span_float(ctx, readWidth, x, y, depth);
dest = _mesa_image_address(packing, pixels, width, height,
GL_DEPTH_COMPONENT, type, 0, j, 0);
GLvoid *dest;
GLstencil stencil[MAX_WIDTH];
- _mesa_read_stencil_span(ctx, readWidth, x, y, stencil);
+ _swrast_read_stencil_span(ctx, readWidth, x, y, stencil);
dest = _mesa_image_address(packing, pixels, width, height,
GL_STENCIL_INDEX, type, 0, j, 0);
GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
/* can't do scale, bias, mapping, etc */
if (ctx->_ImageTransferState)
return GL_FALSE;
rowLength = width;
/* horizontal clipping */
- if (srcX < ctx->ReadBuffer->_Xmin) {
- skipPixels += (ctx->ReadBuffer->_Xmin - srcX);
- readWidth -= (ctx->ReadBuffer->_Xmin - srcX);
- srcX = ctx->ReadBuffer->_Xmin;
+ if (srcX < 0) {
+ skipPixels -= srcX;
+ readWidth += srcX;
+ srcX = 0;
}
- if (srcX + readWidth > ctx->ReadBuffer->_Xmax)
- readWidth -= (srcX + readWidth - ctx->ReadBuffer->_Xmax);
+ if (srcX + readWidth > (GLint) ctx->ReadBuffer->Width)
+ readWidth -= (srcX + readWidth - (GLint) ctx->ReadBuffer->Width);
if (readWidth <= 0)
return GL_TRUE;
/* vertical clipping */
- if (srcY < ctx->ReadBuffer->_Ymin) {
- skipRows += (ctx->ReadBuffer->_Ymin - srcY);
- readHeight -= (ctx->ReadBuffer->_Ymin - srcY);
- srcY = ctx->ReadBuffer->_Ymin;
+ if (srcY < 0) {
+ skipRows -= srcY;
+ readHeight += srcY;
+ srcY = 0;
}
- if (srcY + readHeight > ctx->ReadBuffer->_Ymax)
- readHeight -= (srcY + readHeight - ctx->ReadBuffer->_Ymax);
+ if (srcY + readHeight > (GLint) ctx->ReadBuffer->Height)
+ readHeight -= (srcY + readHeight - (GLint) ctx->ReadBuffer->Height);
if (readHeight <= 0)
return GL_TRUE;
if (0) {
#endif
GLchan *dest = (GLchan *) pixels
- + (skipRows * rowLength + skipPixels) * 4;
+ + (skipRows * rowLength + skipPixels) * 4;
GLint row;
+
+ if (packing->Invert) {
+ /* start at top and go down */
+ dest += (readHeight - 1) * rowLength * 4;
+ rowLength = -rowLength;
+ }
+
for (row=0; row<readHeight; row++) {
- (*ctx->Driver.ReadRGBASpan)(ctx, readWidth, srcX, srcY,
+ (*swrast->Driver.ReadRGBASpan)(ctx, readWidth, srcX, srcY,
(GLchan (*)[4]) dest);
if (ctx->DrawBuffer->UseSoftwareAlphaBuffers) {
- _mesa_read_alpha_span(ctx, readWidth, srcX, srcY,
+ _swrast_read_alpha_span(ctx, readWidth, srcX, srcY,
(GLchan (*)[4]) dest);
}
dest += rowLength * 4;
GLenum format, GLenum type, GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLint readWidth;
- (*ctx->Driver.SetReadBuffer)(ctx, ctx->ReadBuffer, ctx->Pixel.DriverReadBuffer);
+ _swrast_use_read_buffer(ctx);
/* Try optimized path first */
if (read_fast_rgba_pixels( ctx, x, y, width, height,
format, type, pixels, packing )) {
- (*ctx->Driver.SetReadBuffer)(ctx, ctx->DrawBuffer, ctx->Color.DriverDrawBuffer);
+ _swrast_use_draw_buffer(ctx);
return; /* done! */
}
GLfloat *dest, *src, *tmpImage, *convImage;
GLint row;
- tmpImage = (GLfloat *) MALLOC(width * height * 4 * sizeof(GLfloat));
+ tmpImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
if (!tmpImage) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
return;
}
- convImage = (GLfloat *) MALLOC(width * height * 4 * sizeof(GLfloat));
+ convImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
if (!convImage) {
- FREE(tmpImage);
+ _mesa_free(tmpImage);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
return;
}
for (row = 0; row < height; row++, y++) {
GLchan rgba[MAX_WIDTH][4];
if (ctx->Visual.rgbMode) {
- _mesa_read_rgba_span(ctx, ctx->ReadBuffer, readWidth, x, y, rgba);
+ _swrast_read_rgba_span(ctx, ctx->ReadBuffer, readWidth, x, y, rgba);
}
else {
GLuint index[MAX_WIDTH];
- (*ctx->Driver.ReadCI32Span)(ctx, readWidth, x, y, index);
+ (*swrast->Driver.ReadCI32Span)(ctx, readWidth, x, y, index);
if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset !=0 ) {
_mesa_map_ci(ctx, readWidth, index);
}
_mesa_map_ci_to_rgba_chan(ctx, readWidth, index, rgba);
}
- _mesa_pack_rgba_span(ctx, readWidth, (const GLchan (*)[4]) rgba,
- GL_RGBA, GL_FLOAT, dest, &_mesa_native_packing,
+ _mesa_pack_rgba_span_chan(ctx, readWidth, (const GLchan (*)[4]) rgba,
+ GL_RGBA, GL_FLOAT, dest, &ctx->DefaultPacking,
transferOps & IMAGE_PRE_CONVOLUTION_BITS);
dest += width * 4;
}
ASSERT(ctx->Pixel.Separable2DEnabled);
_mesa_convolve_sep_image(ctx, &readWidth, &height, tmpImage, convImage);
}
- FREE(tmpImage);
+ _mesa_free(tmpImage);
/* finish transfer ops and pack the resulting image */
src = convImage;
GLvoid *dest;
dest = _mesa_image_address(packing, pixels, readWidth, height,
format, type, 0, row, 0);
- _mesa_pack_float_rgba_span(ctx, readWidth,
+ _mesa_pack_rgba_span_float(ctx, readWidth,
(const GLfloat (*)[4]) src,
format, type, dest, packing,
transferOps & IMAGE_POST_CONVOLUTION_BITS);
GLchan rgba[MAX_WIDTH][4];
GLvoid *dst;
if (ctx->Visual.rgbMode) {
- _mesa_read_rgba_span(ctx, ctx->ReadBuffer, readWidth, x, y, rgba);
+ _swrast_read_rgba_span(ctx, ctx->ReadBuffer, readWidth, x, y, rgba);
}
else {
GLuint index[MAX_WIDTH];
- (*ctx->Driver.ReadCI32Span)(ctx, readWidth, x, y, index);
+ (*swrast->Driver.ReadCI32Span)(ctx, readWidth, x, y, index);
if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) {
_mesa_map_ci(ctx, readWidth, index);
}
* there. This fixes conformance failures with 16-bit color
* buffers, for example.
*/
- GLfloat rgbaf[MAX_WIDTH][4];
+ DEFMARRAY(GLfloat, rgbaf, MAX_WIDTH, 4); /* mac 32k limitation */
+ CHECKARRAY(rgbaf, return); /* mac 32k limitation */
_mesa_chan_to_float_span(ctx, readWidth,
(CONST GLchan (*)[4]) rgba, rgbaf);
- _mesa_pack_float_rgba_span(ctx, readWidth,
+ _mesa_pack_rgba_span_float(ctx, readWidth,
(CONST GLfloat (*)[4]) rgbaf,
format, type, dst, packing,
ctx->_ImageTransferState);
+ UNDEFARRAY(rgbaf); /* mac 32k limitation */
}
else {
/* GLubytes are fine */
- _mesa_pack_rgba_span(ctx, readWidth, (CONST GLchan (*)[4]) rgba,
+ _mesa_pack_rgba_span_chan(ctx, readWidth, (CONST GLchan (*)[4]) rgba,
format, type, dst, packing,
ctx->_ImageTransferState);
}
}
}
- (*ctx->Driver.SetReadBuffer)(ctx, ctx->DrawBuffer, ctx->Color.DriverDrawBuffer);
+ _swrast_use_draw_buffer(ctx);
}
void
_swrast_ReadPixels( GLcontext *ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
- GLenum format, GLenum type,
+ GLenum format, GLenum type,
const struct gl_pixelstore_attrib *pack,
GLvoid *pixels )
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
(void) pack;
- if (SWRAST_CONTEXT(ctx)->NewState)
+ if (swrast->NewState)
_swrast_validate_derived( ctx );
+ pixels = _swrast_validate_pbo_access(pack, width, height, 1,
+ format, type, (GLvoid *) pixels);
+
+ if (!pixels) {
+ _mesa_error( ctx, GL_INVALID_VALUE, "glReadPixels(pixels)" );
+ return;
+ }
+
+ RENDER_START(swrast,ctx);
+
switch (format) {
case GL_COLOR_INDEX:
read_index_pixels(ctx, x, y, width, height, type, pixels, &ctx->Pack);
default:
_mesa_error( ctx, GL_INVALID_ENUM, "glReadPixels(format)" );
}
+
+ RENDER_FINISH(swrast,ctx);
}
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