2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (c) 2009 VMware, Inc.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * Code for glGetTexImage() and glGetCompressedTexImage().
33 #include "bufferobj.h"
37 #include "format_unpack.h"
39 #include "mfeatures.h"
43 #include "texcompress.h"
44 #include "texgetimage.h"
50 * Can the given type represent negative values?
52 static inline GLboolean
53 type_needs_clamping(GLenum type
)
60 case GL_HALF_FLOAT_ARB
:
61 case GL_UNSIGNED_INT_10F_11F_11F_REV
:
62 case GL_UNSIGNED_INT_5_9_9_9_REV
:
71 * glGetTexImage for depth/Z pixels.
74 get_tex_depth(struct gl_context
*ctx
, GLuint dimensions
,
75 GLenum format
, GLenum type
, GLvoid
*pixels
,
76 struct gl_texture_image
*texImage
)
78 const GLint width
= texImage
->Width
;
79 const GLint height
= texImage
->Height
;
80 const GLint depth
= texImage
->Depth
;
82 GLfloat
*depthRow
= (GLfloat
*) malloc(width
* sizeof(GLfloat
));
85 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
89 for (img
= 0; img
< depth
; img
++) {
93 /* map src texture buffer */
94 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
95 0, 0, width
, height
, GL_MAP_READ_BIT
,
96 &srcMap
, &srcRowStride
);
99 for (row
= 0; row
< height
; row
++) {
100 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
101 width
, height
, format
, type
,
103 const GLubyte
*src
= srcMap
+ row
* srcRowStride
;
104 _mesa_unpack_float_z_row(texImage
->TexFormat
, width
, src
, depthRow
);
105 _mesa_pack_depth_span(ctx
, width
, dest
, type
, depthRow
, &ctx
->Pack
);
108 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
111 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
121 * glGetTexImage for depth/stencil pixels.
124 get_tex_depth_stencil(struct gl_context
*ctx
, GLuint dimensions
,
125 GLenum format
, GLenum type
, GLvoid
*pixels
,
126 struct gl_texture_image
*texImage
)
128 const GLint width
= texImage
->Width
;
129 const GLint height
= texImage
->Height
;
130 const GLint depth
= texImage
->Depth
;
133 for (img
= 0; img
< depth
; img
++) {
137 /* map src texture buffer */
138 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
139 0, 0, width
, height
, GL_MAP_READ_BIT
,
140 &srcMap
, &rowstride
);
143 for (row
= 0; row
< height
; row
++) {
144 const GLubyte
*src
= srcMap
+ row
* rowstride
;
145 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
146 width
, height
, format
, type
,
148 /* XXX Z24_S8 vs. S8_Z24??? */
149 memcpy(dest
, src
, width
* sizeof(GLuint
));
150 if (ctx
->Pack
.SwapBytes
) {
151 _mesa_swap4((GLuint
*) dest
, width
);
155 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
158 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
166 * glGetTexImage for YCbCr pixels.
169 get_tex_ycbcr(struct gl_context
*ctx
, GLuint dimensions
,
170 GLenum format
, GLenum type
, GLvoid
*pixels
,
171 struct gl_texture_image
*texImage
)
173 const GLint width
= texImage
->Width
;
174 const GLint height
= texImage
->Height
;
175 const GLint depth
= texImage
->Depth
;
178 for (img
= 0; img
< depth
; img
++) {
182 /* map src texture buffer */
183 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
184 0, 0, width
, height
, GL_MAP_READ_BIT
,
185 &srcMap
, &rowstride
);
188 for (row
= 0; row
< height
; row
++) {
189 const GLubyte
*src
= srcMap
+ row
* rowstride
;
190 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
191 width
, height
, format
, type
,
193 memcpy(dest
, src
, width
* sizeof(GLushort
));
195 /* check for byte swapping */
196 if ((texImage
->TexFormat
== MESA_FORMAT_YCBCR
197 && type
== GL_UNSIGNED_SHORT_8_8_REV_MESA
) ||
198 (texImage
->TexFormat
== MESA_FORMAT_YCBCR_REV
199 && type
== GL_UNSIGNED_SHORT_8_8_MESA
)) {
200 if (!ctx
->Pack
.SwapBytes
)
201 _mesa_swap2((GLushort
*) dest
, width
);
203 else if (ctx
->Pack
.SwapBytes
) {
204 _mesa_swap2((GLushort
*) dest
, width
);
208 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
211 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
219 * Get a color texture image with decompression.
222 get_tex_rgba_compressed(struct gl_context
*ctx
, GLuint dimensions
,
223 GLenum format
, GLenum type
, GLvoid
*pixels
,
224 struct gl_texture_image
*texImage
,
225 GLbitfield transferOps
)
227 /* don't want to apply sRGB -> RGB conversion here so override the format */
228 const gl_format texFormat
=
229 _mesa_get_srgb_format_linear(texImage
->TexFormat
);
230 const GLenum baseFormat
= _mesa_get_format_base_format(texFormat
);
231 const GLuint width
= texImage
->Width
;
232 const GLuint height
= texImage
->Height
;
233 const GLuint depth
= texImage
->Depth
;
234 GLfloat
*tempImage
, *srcRow
;
237 /* Decompress into temp float buffer, then pack into user buffer */
238 tempImage
= (GLfloat
*) malloc(width
* height
* depth
239 * 4 * sizeof(GLfloat
));
241 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage()");
245 /* Decompress the texture image - results in 'tempImage' */
250 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
253 &srcMap
, &srcRowStride
);
255 _mesa_decompress_image(texFormat
, width
, height
,
256 srcMap
, srcRowStride
, tempImage
);
258 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
261 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
267 if (baseFormat
== GL_LUMINANCE
||
268 baseFormat
== GL_LUMINANCE_ALPHA
) {
269 _mesa_rebase_rgba_float(width
* height
, (GLfloat (*)[4]) tempImage
,
274 for (row
= 0; row
< height
; row
++) {
275 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
276 width
, height
, format
, type
,
279 _mesa_pack_rgba_span_float(ctx
, width
, (GLfloat (*)[4]) srcRow
,
280 format
, type
, dest
, &ctx
->Pack
, transferOps
);
289 * Get an uncompressed color texture image.
292 get_tex_rgba_uncompressed(struct gl_context
*ctx
, GLuint dimensions
,
293 GLenum format
, GLenum type
, GLvoid
*pixels
,
294 struct gl_texture_image
*texImage
,
295 GLbitfield transferOps
)
297 /* don't want to apply sRGB -> RGB conversion here so override the format */
298 const gl_format texFormat
=
299 _mesa_get_srgb_format_linear(texImage
->TexFormat
);
300 const GLuint width
= texImage
->Width
;
301 const GLenum destBaseFormat
= _mesa_base_tex_format(ctx
, format
);
302 GLenum rebaseFormat
= GL_NONE
;
303 GLuint height
= texImage
->Height
;
304 GLuint depth
= texImage
->Depth
;
307 GLuint (*rgba_uint
)[4];
308 GLboolean is_integer
= _mesa_is_format_integer_color(texImage
->TexFormat
);
310 /* Allocate buffer for one row of texels */
311 rgba
= (GLfloat (*)[4]) malloc(4 * width
* sizeof(GLfloat
));
312 rgba_uint
= (GLuint (*)[4]) rgba
;
314 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage()");
318 if (texImage
->TexObject
->Target
== GL_TEXTURE_1D_ARRAY
) {
323 if (texImage
->_BaseFormat
== GL_LUMINANCE
||
324 texImage
->_BaseFormat
== GL_INTENSITY
||
325 texImage
->_BaseFormat
== GL_LUMINANCE_ALPHA
) {
326 /* If a luminance (or intensity) texture is read back as RGB(A), the
327 * returned value should be (L,0,0,1), not (L,L,L,1). Set rebaseFormat
330 rebaseFormat
= texImage
->_BaseFormat
;
332 else if ((texImage
->_BaseFormat
== GL_RGBA
||
333 texImage
->_BaseFormat
== GL_RGB
) &&
334 (destBaseFormat
== GL_LUMINANCE
||
335 destBaseFormat
== GL_LUMINANCE_ALPHA
||
336 destBaseFormat
== GL_LUMINANCE_INTEGER_EXT
||
337 destBaseFormat
== GL_LUMINANCE_ALPHA_INTEGER_EXT
)) {
338 /* If we're reading back an RGB(A) texture as luminance then we need
339 * to return L=tex(R). Note, that's different from glReadPixels which
342 rebaseFormat
= GL_LUMINANCE_ALPHA
; /* this covers GL_LUMINANCE too */
345 for (img
= 0; img
< depth
; img
++) {
349 /* map src texture buffer */
350 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
351 0, 0, width
, height
, GL_MAP_READ_BIT
,
352 &srcMap
, &rowstride
);
354 for (row
= 0; row
< height
; row
++) {
355 const GLubyte
*src
= srcMap
+ row
* rowstride
;
356 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
357 width
, height
, format
, type
,
361 _mesa_unpack_uint_rgba_row(texFormat
, width
, src
, rgba_uint
);
363 _mesa_rebase_rgba_uint(width
, rgba_uint
, rebaseFormat
);
364 _mesa_pack_rgba_span_int(ctx
, width
, rgba_uint
,
367 _mesa_unpack_rgba_row(texFormat
, width
, src
, rgba
);
369 _mesa_rebase_rgba_float(width
, rgba
, rebaseFormat
);
370 _mesa_pack_rgba_span_float(ctx
, width
, (GLfloat (*)[4]) rgba
,
372 &ctx
->Pack
, transferOps
);
376 /* Unmap the src texture buffer */
377 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
380 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
390 * glGetTexImage for color formats (RGBA, RGB, alpha, LA, etc).
391 * Compressed textures are handled here as well.
394 get_tex_rgba(struct gl_context
*ctx
, GLuint dimensions
,
395 GLenum format
, GLenum type
, GLvoid
*pixels
,
396 struct gl_texture_image
*texImage
)
398 const GLenum dataType
= _mesa_get_format_datatype(texImage
->TexFormat
);
399 GLbitfield transferOps
= 0x0;
401 /* In general, clamping does not apply to glGetTexImage, except when
402 * the returned type of the image can't hold negative values.
404 if (type_needs_clamping(type
)) {
405 /* the returned image type can't have negative values */
406 if (dataType
== GL_FLOAT
||
407 dataType
== GL_SIGNED_NORMALIZED
||
408 format
== GL_LUMINANCE
||
409 format
== GL_LUMINANCE_ALPHA
) {
410 transferOps
|= IMAGE_CLAMP_BIT
;
413 /* This applies to RGB, RGBA textures. if the format is either LUMINANCE
414 * or LUMINANCE ALPHA, luminance (L) is computed as L=R+G+B .we need to
415 * clamp the sum to [0,1].
417 else if ((format
== GL_LUMINANCE
||
418 format
== GL_LUMINANCE_ALPHA
) &&
419 dataType
== GL_UNSIGNED_NORMALIZED
) {
420 transferOps
|= IMAGE_CLAMP_BIT
;
423 if (_mesa_is_format_compressed(texImage
->TexFormat
)) {
424 get_tex_rgba_compressed(ctx
, dimensions
, format
, type
,
425 pixels
, texImage
, transferOps
);
428 get_tex_rgba_uncompressed(ctx
, dimensions
, format
, type
,
429 pixels
, texImage
, transferOps
);
435 * Try to do glGetTexImage() with simple memcpy().
436 * \return GL_TRUE if done, GL_FALSE otherwise
439 get_tex_memcpy(struct gl_context
*ctx
, GLenum format
, GLenum type
,
441 struct gl_texture_image
*texImage
)
443 const GLenum target
= texImage
->TexObject
->Target
;
444 GLboolean memCopy
= GL_FALSE
;
447 * Check if we can use memcpy to copy from the hardware texture
448 * format to the user's format/type.
449 * Note that GL's pixel transfer ops don't apply to glGetTexImage()
451 if (target
== GL_TEXTURE_1D
||
452 target
== GL_TEXTURE_2D
||
453 target
== GL_TEXTURE_RECTANGLE
||
454 _mesa_is_cube_face(target
)) {
455 memCopy
= _mesa_format_matches_format_and_type(texImage
->TexFormat
,
457 ctx
->Pack
.SwapBytes
);
461 const GLuint bpp
= _mesa_get_format_bytes(texImage
->TexFormat
);
462 const GLuint bytesPerRow
= texImage
->Width
* bpp
;
464 _mesa_image_address2d(&ctx
->Pack
, pixels
, texImage
->Width
,
465 texImage
->Height
, format
, type
, 0, 0);
466 const GLint dstRowStride
=
467 _mesa_image_row_stride(&ctx
->Pack
, texImage
->Width
, format
, type
);
471 /* map src texture buffer */
472 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
473 0, 0, texImage
->Width
, texImage
->Height
,
474 GL_MAP_READ_BIT
, &src
, &srcRowStride
);
477 if (bytesPerRow
== dstRowStride
&& bytesPerRow
== srcRowStride
) {
478 memcpy(dst
, src
, bytesPerRow
* texImage
->Height
);
482 for (row
= 0; row
< texImage
->Height
; row
++) {
483 memcpy(dst
, src
, bytesPerRow
);
489 /* unmap src texture buffer */
490 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
493 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
502 * This is the software fallback for Driver.GetTexImage().
503 * All error checking will have been done before this routine is called.
504 * We'll call ctx->Driver.MapTextureImage() to access the data, then
505 * unmap with ctx->Driver.UnmapTextureImage().
508 _mesa_get_teximage(struct gl_context
*ctx
,
509 GLenum format
, GLenum type
, GLvoid
*pixels
,
510 struct gl_texture_image
*texImage
)
514 switch (texImage
->TexObject
->Target
) {
525 /* map dest buffer, if PBO */
526 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
527 /* Packing texture image into a PBO.
528 * Map the (potentially) VRAM-based buffer into our process space so
529 * we can write into it with the code below.
530 * A hardware driver might use a sophisticated blit to move the
531 * texture data to the PBO if the PBO is in VRAM along with the texture.
533 GLubyte
*buf
= (GLubyte
*)
534 ctx
->Driver
.MapBufferRange(ctx
, 0, ctx
->Pack
.BufferObj
->Size
,
535 GL_MAP_WRITE_BIT
, ctx
->Pack
.BufferObj
);
537 /* out of memory or other unexpected error */
538 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage(map PBO failed)");
541 /* <pixels> was an offset into the PBO.
542 * Now make it a real, client-side pointer inside the mapped region.
544 pixels
= ADD_POINTERS(buf
, pixels
);
547 if (get_tex_memcpy(ctx
, format
, type
, pixels
, texImage
)) {
550 else if (format
== GL_DEPTH_COMPONENT
) {
551 get_tex_depth(ctx
, dimensions
, format
, type
, pixels
, texImage
);
553 else if (format
== GL_DEPTH_STENCIL_EXT
) {
554 get_tex_depth_stencil(ctx
, dimensions
, format
, type
, pixels
, texImage
);
556 else if (format
== GL_YCBCR_MESA
) {
557 get_tex_ycbcr(ctx
, dimensions
, format
, type
, pixels
, texImage
);
560 get_tex_rgba(ctx
, dimensions
, format
, type
, pixels
, texImage
);
563 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
564 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Pack
.BufferObj
);
571 * This is the software fallback for Driver.GetCompressedTexImage().
572 * All error checking will have been done before this routine is called.
575 _mesa_get_compressed_teximage(struct gl_context
*ctx
,
576 struct gl_texture_image
*texImage
,
579 const GLuint row_stride
=
580 _mesa_format_row_stride(texImage
->TexFormat
, texImage
->Width
);
585 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
586 /* pack texture image into a PBO */
587 GLubyte
*buf
= (GLubyte
*)
588 ctx
->Driver
.MapBufferRange(ctx
, 0, ctx
->Pack
.BufferObj
->Size
,
589 GL_MAP_WRITE_BIT
, ctx
->Pack
.BufferObj
);
591 /* out of memory or other unexpected error */
592 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
593 "glGetCompresssedTexImage(map PBO failed)");
596 img
= ADD_POINTERS(buf
, img
);
599 /* map src texture buffer */
600 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
601 0, 0, texImage
->Width
, texImage
->Height
,
602 GL_MAP_READ_BIT
, &src
, &srcRowStride
);
605 /* no pixelstore or pixel transfer, but respect stride */
607 if (row_stride
== srcRowStride
) {
608 const GLuint size
= _mesa_format_image_size(texImage
->TexFormat
,
612 memcpy(img
, src
, size
);
616 _mesa_get_format_block_size(texImage
->TexFormat
, &bw
, &bh
);
617 for (i
= 0; i
< (texImage
->Height
+ bh
- 1) / bh
; i
++) {
618 memcpy((GLubyte
*)img
+ i
* row_stride
,
619 (GLubyte
*)src
+ i
* srcRowStride
,
624 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
627 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetCompresssedTexImage");
630 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
631 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Pack
.BufferObj
);
638 * Do error checking for a glGetTexImage() call.
639 * \return GL_TRUE if any error, GL_FALSE if no errors.
642 getteximage_error_check(struct gl_context
*ctx
, GLenum target
, GLint level
,
643 GLenum format
, GLenum type
, GLsizei clientMemSize
,
646 struct gl_texture_object
*texObj
;
647 struct gl_texture_image
*texImage
;
648 const GLint maxLevels
= _mesa_max_texture_levels(ctx
, target
);
649 const GLuint dimensions
= (target
== GL_TEXTURE_3D
) ? 3 : 2;
650 GLenum baseFormat
, err
;
652 if (maxLevels
== 0) {
653 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(target=0x%x)", target
);
657 if (level
< 0 || level
>= maxLevels
) {
658 _mesa_error( ctx
, GL_INVALID_VALUE
, "glGetTexImage(level)" );
662 err
= _mesa_error_check_format_and_type(ctx
, format
, type
);
663 if (err
!= GL_NO_ERROR
) {
664 _mesa_error(ctx
, err
, "glGetTexImage(format/type)");
668 texObj
= _mesa_get_current_tex_object(ctx
, target
);
670 if (!texObj
|| _mesa_is_proxy_texture(target
)) {
671 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(target)");
675 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
677 /* non-existant texture image */
681 baseFormat
= _mesa_get_format_base_format(texImage
->TexFormat
);
683 /* Make sure the requested image format is compatible with the
686 if (_mesa_is_color_format(format
)
687 && !_mesa_is_color_format(baseFormat
)) {
688 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
691 else if (_mesa_is_depth_format(format
)
692 && !_mesa_is_depth_format(baseFormat
)
693 && !_mesa_is_depthstencil_format(baseFormat
)) {
694 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
697 else if (_mesa_is_ycbcr_format(format
)
698 && !_mesa_is_ycbcr_format(baseFormat
)) {
699 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
702 else if (_mesa_is_depthstencil_format(format
)
703 && !_mesa_is_depthstencil_format(baseFormat
)) {
704 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
707 else if (_mesa_is_dudv_format(format
)
708 && !_mesa_is_dudv_format(baseFormat
)) {
709 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
713 if (!_mesa_validate_pbo_access(dimensions
, &ctx
->Pack
, texImage
->Width
,
714 texImage
->Height
, texImage
->Depth
,
715 format
, type
, clientMemSize
, pixels
)) {
716 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
717 _mesa_error(ctx
, GL_INVALID_OPERATION
,
718 "glGetTexImage(out of bounds PBO access)");
720 _mesa_error(ctx
, GL_INVALID_OPERATION
,
721 "glGetnTexImageARB(out of bounds access:"
722 " bufSize (%d) is too small)", clientMemSize
);
727 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
728 /* PBO should not be mapped */
729 if (_mesa_bufferobj_mapped(ctx
->Pack
.BufferObj
)) {
730 _mesa_error(ctx
, GL_INVALID_OPERATION
,
731 "glGetTexImage(PBO is mapped)");
742 * Get texture image. Called by glGetTexImage.
744 * \param target texture target.
745 * \param level image level.
746 * \param format pixel data format for returned image.
747 * \param type pixel data type for returned image.
748 * \param bufSize size of the pixels data buffer.
749 * \param pixels returned pixel data.
752 _mesa_GetnTexImageARB( GLenum target
, GLint level
, GLenum format
,
753 GLenum type
, GLsizei bufSize
, GLvoid
*pixels
)
755 struct gl_texture_object
*texObj
;
756 struct gl_texture_image
*texImage
;
757 GET_CURRENT_CONTEXT(ctx
);
758 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
760 if (getteximage_error_check(ctx
, target
, level
, format
, type
,
765 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !pixels
) {
766 /* not an error, do nothing */
770 texObj
= _mesa_get_current_tex_object(ctx
, target
);
771 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
773 if (_mesa_is_zero_size_texture(texImage
))
776 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
777 _mesa_debug(ctx
, "glGetTexImage(tex %u) format = %s, w=%d, h=%d,"
778 " dstFmt=0x%x, dstType=0x%x\n",
780 _mesa_get_format_name(texImage
->TexFormat
),
781 texImage
->Width
, texImage
->Height
,
785 _mesa_lock_texture(ctx
, texObj
);
787 ctx
->Driver
.GetTexImage(ctx
, format
, type
, pixels
, texImage
);
789 _mesa_unlock_texture(ctx
, texObj
);
794 _mesa_GetTexImage( GLenum target
, GLint level
, GLenum format
,
795 GLenum type
, GLvoid
*pixels
)
797 _mesa_GetnTexImageARB(target
, level
, format
, type
, INT_MAX
, pixels
);
802 * Do error checking for a glGetCompressedTexImage() call.
803 * \return GL_TRUE if any error, GL_FALSE if no errors.
806 getcompressedteximage_error_check(struct gl_context
*ctx
, GLenum target
,
807 GLint level
, GLsizei clientMemSize
, GLvoid
*img
)
809 struct gl_texture_object
*texObj
;
810 struct gl_texture_image
*texImage
;
811 const GLint maxLevels
= _mesa_max_texture_levels(ctx
, target
);
812 GLuint compressedSize
;
814 if (maxLevels
== 0) {
815 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetCompressedTexImage(target=0x%x)",
820 if (level
< 0 || level
>= maxLevels
) {
821 _mesa_error(ctx
, GL_INVALID_VALUE
,
822 "glGetCompressedTexImageARB(bad level = %d)", level
);
826 if (_mesa_is_proxy_texture(target
)) {
827 _mesa_error(ctx
, GL_INVALID_ENUM
,
828 "glGetCompressedTexImageARB(bad target = %s)",
829 _mesa_lookup_enum_by_nr(target
));
833 texObj
= _mesa_get_current_tex_object(ctx
, target
);
835 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetCompressedTexImageARB(target)");
839 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
842 /* probably invalid mipmap level */
843 _mesa_error(ctx
, GL_INVALID_VALUE
,
844 "glGetCompressedTexImageARB(level)");
848 if (!_mesa_is_format_compressed(texImage
->TexFormat
)) {
849 _mesa_error(ctx
, GL_INVALID_OPERATION
,
850 "glGetCompressedTexImageARB(texture is not compressed)");
854 compressedSize
= _mesa_format_image_size(texImage
->TexFormat
,
859 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
860 /* do bounds checking on writing to client memory */
861 if (clientMemSize
< compressedSize
) {
862 _mesa_error(ctx
, GL_INVALID_OPERATION
,
863 "glGetnCompressedTexImageARB(out of bounds access:"
864 " bufSize (%d) is too small)", clientMemSize
);
868 /* do bounds checking on PBO write */
869 if ((const GLubyte
*) img
+ compressedSize
>
870 (const GLubyte
*) ctx
->Pack
.BufferObj
->Size
) {
871 _mesa_error(ctx
, GL_INVALID_OPERATION
,
872 "glGetCompressedTexImage(out of bounds PBO access)");
876 /* make sure PBO is not mapped */
877 if (_mesa_bufferobj_mapped(ctx
->Pack
.BufferObj
)) {
878 _mesa_error(ctx
, GL_INVALID_OPERATION
,
879 "glGetCompressedTexImage(PBO is mapped)");
889 _mesa_GetnCompressedTexImageARB(GLenum target
, GLint level
, GLsizei bufSize
,
892 struct gl_texture_object
*texObj
;
893 struct gl_texture_image
*texImage
;
894 GET_CURRENT_CONTEXT(ctx
);
895 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
897 if (getcompressedteximage_error_check(ctx
, target
, level
, bufSize
, img
)) {
901 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !img
) {
902 /* not an error, do nothing */
906 texObj
= _mesa_get_current_tex_object(ctx
, target
);
907 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
909 if (_mesa_is_zero_size_texture(texImage
))
912 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
914 "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n",
916 _mesa_get_format_name(texImage
->TexFormat
),
917 texImage
->Width
, texImage
->Height
);
920 _mesa_lock_texture(ctx
, texObj
);
922 ctx
->Driver
.GetCompressedTexImage(ctx
, texImage
, img
);
924 _mesa_unlock_texture(ctx
, texObj
);
928 _mesa_GetCompressedTexImageARB(GLenum target
, GLint level
, GLvoid
*img
)
930 _mesa_GetnCompressedTexImageARB(target
, level
, INT_MAX
, img
);