2
* Mesa 3-D graphics library
5
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a
8
* copy of this software and associated documentation files (the "Software"),
9
* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
12
* Software is furnished to do so, subject to the following conditions:
14
* The above copyright notice and this permission notice shall be included
15
* in all copies or substantial portions of the Software.
17
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27
#include "bufferobj.h"
31
#include "framebuffer.h"
33
#include "format_unpack.h"
39
#include "glformats.h"
43
/* Inexplicably, GL_HALF_FLOAT_OES has a different value than GL_HALF_FLOAT.
45
#ifndef GL_HALF_FLOAT_OES
46
#define GL_HALF_FLOAT_OES 0x8D61
50
* Tries to implement glReadPixels() of GL_DEPTH_COMPONENT using memcpy of the
54
fast_read_depth_pixels( struct gl_context *ctx,
56
GLsizei width, GLsizei height,
57
GLenum type, GLvoid *pixels,
58
const struct gl_pixelstore_attrib *packing )
60
struct gl_framebuffer *fb = ctx->ReadBuffer;
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struct gl_renderbuffer *rb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
63
int stride, dstStride, j;
65
if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0)
68
if (packing->SwapBytes)
71
if (_mesa_get_format_datatype(rb->Format) != GL_UNSIGNED_NORMALIZED)
74
if (!((type == GL_UNSIGNED_SHORT && rb->Format == MESA_FORMAT_Z16) ||
75
type == GL_UNSIGNED_INT))
78
ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
82
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
83
return GL_TRUE; /* don't bother trying the slow path */
86
dstStride = _mesa_image_row_stride(packing, width, GL_DEPTH_COMPONENT, type);
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dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
88
GL_DEPTH_COMPONENT, type, 0, 0);
90
for (j = 0; j < height; j++) {
91
if (type == GL_UNSIGNED_INT) {
92
_mesa_unpack_uint_z_row(rb->Format, width, map, (GLuint *)dst);
94
ASSERT(type == GL_UNSIGNED_SHORT && rb->Format == MESA_FORMAT_Z16);
95
memcpy(dst, map, width * 2);
101
ctx->Driver.UnmapRenderbuffer(ctx, rb);
107
* Read pixels for format=GL_DEPTH_COMPONENT.
110
read_depth_pixels( struct gl_context *ctx,
112
GLsizei width, GLsizei height,
113
GLenum type, GLvoid *pixels,
114
const struct gl_pixelstore_attrib *packing )
116
struct gl_framebuffer *fb = ctx->ReadBuffer;
117
struct gl_renderbuffer *rb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
120
int dstStride, stride;
121
GLfloat *depthValues;
126
/* clipping should have been done already */
129
ASSERT(x + width <= (GLint) rb->Width);
130
ASSERT(y + height <= (GLint) rb->Height);
132
if (fast_read_depth_pixels(ctx, x, y, width, height, type, pixels, packing))
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dstStride = _mesa_image_row_stride(packing, width, GL_DEPTH_COMPONENT, type);
136
dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
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GL_DEPTH_COMPONENT, type, 0, 0);
139
ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
142
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
146
depthValues = (GLfloat *) malloc(width * sizeof(GLfloat));
149
/* General case (slower) */
150
for (j = 0; j < height; j++, y++) {
151
_mesa_unpack_float_z_row(rb->Format, width, map, depthValues);
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_mesa_pack_depth_span(ctx, width, dst, type, depthValues, packing);
159
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
164
ctx->Driver.UnmapRenderbuffer(ctx, rb);
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* Read pixels for format=GL_STENCIL_INDEX.
172
read_stencil_pixels( struct gl_context *ctx,
174
GLsizei width, GLsizei height,
175
GLenum type, GLvoid *pixels,
176
const struct gl_pixelstore_attrib *packing )
178
struct gl_framebuffer *fb = ctx->ReadBuffer;
179
struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
181
GLubyte *map, *stencil;
187
ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
190
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
194
stencil = (GLubyte *) malloc(width * sizeof(GLubyte));
197
/* process image row by row */
198
for (j = 0; j < height; j++) {
201
_mesa_unpack_ubyte_stencil_row(rb->Format, width, map, stencil);
202
dest = _mesa_image_address2d(packing, pixels, width, height,
203
GL_STENCIL_INDEX, type, j, 0);
205
_mesa_pack_stencil_span(ctx, width, type, dest, stencil, packing);
211
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
216
ctx->Driver.UnmapRenderbuffer(ctx, rb);
221
* Try to do glReadPixels of RGBA data using a simple memcpy or swizzle.
222
* \return GL_TRUE if successful, GL_FALSE otherwise (use the slow path)
225
fast_read_rgba_pixels_memcpy( struct gl_context *ctx,
227
GLsizei width, GLsizei height,
228
GLenum format, GLenum type,
230
const struct gl_pixelstore_attrib *packing,
231
GLbitfield transferOps )
233
struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
235
int dstStride, stride, j, texelBytes;
236
GLboolean swizzle_rb = GL_FALSE, copy_xrgb = GL_FALSE;
238
/* XXX we could check for other swizzle/special cases here as needed */
239
if (rb->Format == MESA_FORMAT_RGBA8888_REV &&
241
type == GL_UNSIGNED_INT_8_8_8_8_REV &&
242
!ctx->Pack.SwapBytes) {
243
swizzle_rb = GL_TRUE;
245
else if (rb->Format == MESA_FORMAT_XRGB8888 &&
247
type == GL_UNSIGNED_INT_8_8_8_8_REV &&
248
!ctx->Pack.SwapBytes) {
251
else if (!_mesa_format_matches_format_and_type(rb->Format, format, type,
252
ctx->Pack.SwapBytes))
255
/* If the format is unsigned normalized then we can ignore clamping
256
* because the values are already in the range [0,1] so it won't
257
* have any effect anyway.
259
if (_mesa_get_format_datatype(rb->Format) == GL_UNSIGNED_NORMALIZED)
260
transferOps &= ~IMAGE_CLAMP_BIT;
265
dstStride = _mesa_image_row_stride(packing, width, format, type);
266
dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
269
ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
272
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
273
return GL_TRUE; /* don't bother trying the slow path */
276
texelBytes = _mesa_get_format_bytes(rb->Format);
280
for (j = 0; j < height; j++) {
282
for (i = 0; i < width; i++) {
283
GLuint *dst4 = (GLuint *) dst, *map4 = (GLuint *) map;
284
GLuint pixel = map4[i];
285
dst4[i] = (pixel & 0xff00ff00)
286
| ((pixel & 0x00ff0000) >> 16)
287
| ((pixel & 0x000000ff) << 16);
292
} else if (copy_xrgb) {
293
/* convert xrgb -> argb */
294
for (j = 0; j < height; j++) {
295
GLuint *dst4 = (GLuint *) dst, *map4 = (GLuint *) map;
297
for (i = 0; i < width; i++) {
298
dst4[i] = map4[i] | 0xff000000; /* set A=0xff */
305
for (j = 0; j < height; j++) {
306
memcpy(dst, map, width * texelBytes);
312
ctx->Driver.UnmapRenderbuffer(ctx, rb);
318
slow_read_rgba_pixels( struct gl_context *ctx,
320
GLsizei width, GLsizei height,
321
GLenum format, GLenum type,
323
const struct gl_pixelstore_attrib *packing,
324
GLbitfield transferOps )
326
struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
327
const gl_format rbFormat = _mesa_get_srgb_format_linear(rb->Format);
330
int dstStride, stride, j;
331
GLboolean dst_is_integer = _mesa_is_enum_format_integer(format);
332
GLboolean dst_is_uint = _mesa_is_format_unsigned(rbFormat);
334
dstStride = _mesa_image_row_stride(packing, width, format, type);
335
dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
338
ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
341
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
345
rgba = malloc(width * MAX_PIXEL_BYTES);
349
for (j = 0; j < height; j++) {
350
if (dst_is_integer) {
351
_mesa_unpack_uint_rgba_row(rbFormat, width, map, (GLuint (*)[4]) rgba);
352
_mesa_rebase_rgba_uint(width, (GLuint (*)[4]) rgba,
355
_mesa_pack_rgba_span_from_uints(ctx, width, (GLuint (*)[4]) rgba, format,
358
_mesa_pack_rgba_span_from_ints(ctx, width, (GLint (*)[4]) rgba, format,
362
_mesa_unpack_rgba_row(rbFormat, width, map, (GLfloat (*)[4]) rgba);
363
_mesa_rebase_rgba_float(width, (GLfloat (*)[4]) rgba,
365
_mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba, format,
366
type, dst, packing, transferOps);
375
ctx->Driver.UnmapRenderbuffer(ctx, rb);
379
* Read R, G, B, A, RGB, L, or LA pixels.
382
read_rgba_pixels( struct gl_context *ctx,
384
GLsizei width, GLsizei height,
385
GLenum format, GLenum type, GLvoid *pixels,
386
const struct gl_pixelstore_attrib *packing )
388
GLbitfield transferOps = ctx->_ImageTransferState;
389
struct gl_framebuffer *fb = ctx->ReadBuffer;
390
struct gl_renderbuffer *rb = fb->_ColorReadBuffer;
395
if ((ctx->Color._ClampReadColor == GL_TRUE || type != GL_FLOAT) &&
396
!_mesa_is_enum_format_integer(format)) {
397
transferOps |= IMAGE_CLAMP_BIT;
400
/* Try the optimized paths first. */
401
if (fast_read_rgba_pixels_memcpy(ctx, x, y, width, height,
402
format, type, pixels, packing,
407
slow_read_rgba_pixels(ctx, x, y, width, height,
408
format, type, pixels, packing, transferOps);
412
* For a packed depth/stencil buffer being read as depth/stencil, just memcpy the
413
* data (possibly swapping 8/24 vs 24/8 as we go).
416
fast_read_depth_stencil_pixels(struct gl_context *ctx,
418
GLsizei width, GLsizei height,
419
GLubyte *dst, int dstStride)
421
struct gl_framebuffer *fb = ctx->ReadBuffer;
422
struct gl_renderbuffer *rb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
423
struct gl_renderbuffer *stencilRb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
430
if (rb->Format != MESA_FORMAT_Z24_S8 &&
431
rb->Format != MESA_FORMAT_S8_Z24)
434
ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
437
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
438
return GL_TRUE; /* don't bother trying the slow path */
441
for (i = 0; i < height; i++) {
442
_mesa_unpack_uint_24_8_depth_stencil_row(rb->Format, width,
448
ctx->Driver.UnmapRenderbuffer(ctx, rb);
455
* For non-float-depth and stencil buffers being read as 24/8 depth/stencil,
456
* copy the integer data directly instead of converting depth to float and
460
fast_read_depth_stencil_pixels_separate(struct gl_context *ctx,
462
GLsizei width, GLsizei height,
463
uint32_t *dst, int dstStride)
465
struct gl_framebuffer *fb = ctx->ReadBuffer;
466
struct gl_renderbuffer *depthRb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
467
struct gl_renderbuffer *stencilRb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
468
GLubyte *depthMap, *stencilMap, *stencilVals;
469
int depthStride, stencilStride, i, j;
471
if (_mesa_get_format_datatype(depthRb->Format) != GL_UNSIGNED_NORMALIZED)
474
ctx->Driver.MapRenderbuffer(ctx, depthRb, x, y, width, height,
475
GL_MAP_READ_BIT, &depthMap, &depthStride);
477
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
478
return GL_TRUE; /* don't bother trying the slow path */
481
ctx->Driver.MapRenderbuffer(ctx, stencilRb, x, y, width, height,
482
GL_MAP_READ_BIT, &stencilMap, &stencilStride);
484
ctx->Driver.UnmapRenderbuffer(ctx, depthRb);
485
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
486
return GL_TRUE; /* don't bother trying the slow path */
489
stencilVals = (GLubyte *) malloc(width * sizeof(GLubyte));
492
for (j = 0; j < height; j++) {
493
_mesa_unpack_uint_z_row(depthRb->Format, width, depthMap, dst);
494
_mesa_unpack_ubyte_stencil_row(stencilRb->Format, width,
495
stencilMap, stencilVals);
497
for (i = 0; i < width; i++) {
498
dst[i] = (dst[i] & 0xffffff00) | stencilVals[i];
501
depthMap += depthStride;
502
stencilMap += stencilStride;
503
dst += dstStride / 4;
507
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
512
ctx->Driver.UnmapRenderbuffer(ctx, depthRb);
513
ctx->Driver.UnmapRenderbuffer(ctx, stencilRb);
519
slow_read_depth_stencil_pixels_separate(struct gl_context *ctx,
521
GLsizei width, GLsizei height,
523
const struct gl_pixelstore_attrib *packing,
524
GLubyte *dst, int dstStride)
526
struct gl_framebuffer *fb = ctx->ReadBuffer;
527
struct gl_renderbuffer *depthRb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
528
struct gl_renderbuffer *stencilRb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
529
GLubyte *depthMap, *stencilMap;
530
int depthStride, stencilStride, j;
531
GLubyte *stencilVals;
535
/* The depth and stencil buffers might be separate, or a single buffer.
536
* If one buffer, only map it once.
538
ctx->Driver.MapRenderbuffer(ctx, depthRb, x, y, width, height,
539
GL_MAP_READ_BIT, &depthMap, &depthStride);
541
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
545
if (stencilRb != depthRb) {
546
ctx->Driver.MapRenderbuffer(ctx, stencilRb, x, y, width, height,
547
GL_MAP_READ_BIT, &stencilMap,
550
ctx->Driver.UnmapRenderbuffer(ctx, depthRb);
551
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
556
stencilMap = depthMap;
557
stencilStride = depthStride;
560
stencilVals = (GLubyte *) malloc(width * sizeof(GLubyte));
561
depthVals = (GLfloat *) malloc(width * sizeof(GLfloat));
563
if (stencilVals && depthVals) {
564
for (j = 0; j < height; j++) {
565
_mesa_unpack_float_z_row(depthRb->Format, width, depthMap, depthVals);
566
_mesa_unpack_ubyte_stencil_row(stencilRb->Format, width,
567
stencilMap, stencilVals);
569
_mesa_pack_depth_stencil_span(ctx, width, type, (GLuint *)dst,
570
depthVals, stencilVals, packing);
572
depthMap += depthStride;
573
stencilMap += stencilStride;
578
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
584
ctx->Driver.UnmapRenderbuffer(ctx, depthRb);
585
if (stencilRb != depthRb) {
586
ctx->Driver.UnmapRenderbuffer(ctx, stencilRb);
592
* Read combined depth/stencil values.
593
* We'll have already done error checking to be sure the expected
594
* depth and stencil buffers really exist.
597
read_depth_stencil_pixels(struct gl_context *ctx,
599
GLsizei width, GLsizei height,
600
GLenum type, GLvoid *pixels,
601
const struct gl_pixelstore_attrib *packing )
603
const GLboolean scaleOrBias
604
= ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
605
const GLboolean stencilTransfer = ctx->Pixel.IndexShift
606
|| ctx->Pixel.IndexOffset || ctx->Pixel.MapStencilFlag;
610
dst = (GLubyte *) _mesa_image_address2d(packing, pixels,
612
GL_DEPTH_STENCIL_EXT,
614
dstStride = _mesa_image_row_stride(packing, width,
615
GL_DEPTH_STENCIL_EXT, type);
617
/* Fast 24/8 reads. */
618
if (type == GL_UNSIGNED_INT_24_8 &&
619
!scaleOrBias && !stencilTransfer && !packing->SwapBytes) {
620
if (fast_read_depth_stencil_pixels(ctx, x, y, width, height,
624
if (fast_read_depth_stencil_pixels_separate(ctx, x, y, width, height,
625
(uint32_t *)dst, dstStride))
629
slow_read_depth_stencil_pixels_separate(ctx, x, y, width, height,
637
* Software fallback routine for ctx->Driver.ReadPixels().
638
* By time we get here, all error checking will have been done.
641
_mesa_readpixels(struct gl_context *ctx,
642
GLint x, GLint y, GLsizei width, GLsizei height,
643
GLenum format, GLenum type,
644
const struct gl_pixelstore_attrib *packing,
647
struct gl_pixelstore_attrib clippedPacking = *packing;
650
_mesa_update_state(ctx);
652
/* Do all needed clipping here, so that we can forget about it later */
653
if (_mesa_clip_readpixels(ctx, &x, &y, &width, &height, &clippedPacking)) {
655
pixels = _mesa_map_pbo_dest(ctx, &clippedPacking, pixels);
659
case GL_STENCIL_INDEX:
660
read_stencil_pixels(ctx, x, y, width, height, type, pixels,
663
case GL_DEPTH_COMPONENT:
664
read_depth_pixels(ctx, x, y, width, height, type, pixels,
667
case GL_DEPTH_STENCIL_EXT:
668
read_depth_stencil_pixels(ctx, x, y, width, height, type, pixels,
672
/* all other formats should be color formats */
673
read_rgba_pixels(ctx, x, y, width, height, format, type, pixels,
677
_mesa_unmap_pbo_dest(ctx, &clippedPacking);
684
_mesa_ReadnPixelsARB( GLint x, GLint y, GLsizei width, GLsizei height,
685
GLenum format, GLenum type, GLsizei bufSize,
690
GET_CURRENT_CONTEXT(ctx);
691
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
693
FLUSH_CURRENT(ctx, 0);
695
if (MESA_VERBOSE & VERBOSE_API)
696
_mesa_debug(ctx, "glReadPixels(%d, %d, %s, %s, %p)\n",
698
_mesa_lookup_enum_by_nr(format),
699
_mesa_lookup_enum_by_nr(type),
702
if (width < 0 || height < 0) {
703
_mesa_error( ctx, GL_INVALID_VALUE,
704
"glReadPixels(width=%d height=%d)", width, height );
708
/* OpenGL ES 1.x and OpenGL ES 2.0 impose additional restrictions on the
709
* combinations of format and type that can be used.
711
* Technically, only two combinations are actually allowed:
712
* GL_RGBA/GL_UNSIGNED_BYTE, and some implementation-specific internal
713
* preferred combination. This code doesn't know what that preferred
714
* combination is, and Mesa can handle anything valid. Just work instead.
716
if (_mesa_is_gles(ctx) && ctx->Version < 30) {
717
err = _mesa_es_error_check_format_and_type(format, type, 2);
718
if (err == GL_NO_ERROR) {
719
if (type == GL_FLOAT || type == GL_HALF_FLOAT_OES) {
720
err = GL_INVALID_OPERATION;
721
} else if (format == GL_DEPTH_COMPONENT
722
|| format == GL_DEPTH_STENCIL) {
723
err = GL_INVALID_ENUM;
727
if (err != GL_NO_ERROR) {
728
_mesa_error(ctx, err, "glReadPixels(invalid format %s and/or type %s)",
729
_mesa_lookup_enum_by_nr(format),
730
_mesa_lookup_enum_by_nr(type));
736
_mesa_update_state(ctx);
738
err = _mesa_error_check_format_and_type(ctx, format, type);
739
if (err != GL_NO_ERROR) {
740
_mesa_error(ctx, err, "glReadPixels(invalid format %s and/or type %s)",
741
_mesa_lookup_enum_by_nr(format),
742
_mesa_lookup_enum_by_nr(type));
746
if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
747
_mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
748
"glReadPixels(incomplete framebuffer)" );
752
/* Check that the destination format and source buffer are both
753
* integer-valued or both non-integer-valued.
755
if (ctx->Extensions.EXT_texture_integer && _mesa_is_color_format(format)) {
756
const struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
757
const GLboolean srcInteger = _mesa_is_format_integer_color(rb->Format);
758
const GLboolean dstInteger = _mesa_is_enum_format_integer(format);
759
if (dstInteger != srcInteger) {
760
_mesa_error(ctx, GL_INVALID_OPERATION,
761
"glReadPixels(integer / non-integer format mismatch");
766
if (_mesa_is_user_fbo(ctx->ReadBuffer) &&
767
ctx->ReadBuffer->Visual.samples > 0) {
768
_mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(multisample FBO)");
772
if (!_mesa_source_buffer_exists(ctx, format)) {
773
_mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(no readbuffer)");
777
if (width == 0 || height == 0)
778
return; /* nothing to do */
780
if (!_mesa_validate_pbo_access(2, &ctx->Pack, width, height, 1,
781
format, type, bufSize, pixels)) {
782
if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
783
_mesa_error(ctx, GL_INVALID_OPERATION,
784
"glReadPixels(out of bounds PBO access)");
786
_mesa_error(ctx, GL_INVALID_OPERATION,
787
"glReadnPixelsARB(out of bounds access:"
788
" bufSize (%d) is too small)", bufSize);
793
if (_mesa_is_bufferobj(ctx->Pack.BufferObj) &&
794
_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) {
795
/* buffer is mapped - that's an error */
796
_mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(PBO is mapped)");
800
ctx->Driver.ReadPixels(ctx, x, y, width, height,
801
format, type, &ctx->Pack, pixels);
805
_mesa_ReadPixels( GLint x, GLint y, GLsizei width, GLsizei height,
806
GLenum format, GLenum type, GLvoid *pixels )
808
_mesa_ReadnPixelsARB(x, y, width, height, format, type, INT_MAX, pixels);