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_with_negative_values(GLenum type
)
60 case GL_HALF_FLOAT_ARB
:
69 * glGetTexImage for depth/Z pixels.
72 get_tex_depth(struct gl_context
*ctx
, GLuint dimensions
,
73 GLenum format
, GLenum type
, GLvoid
*pixels
,
74 struct gl_texture_image
*texImage
)
76 const GLint width
= texImage
->Width
;
77 const GLint height
= texImage
->Height
;
78 const GLint depth
= texImage
->Depth
;
80 GLfloat
*depthRow
= (GLfloat
*) malloc(width
* sizeof(GLfloat
));
83 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
87 for (img
= 0; img
< depth
; img
++) {
91 /* map src texture buffer */
92 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
93 0, 0, width
, height
, GL_MAP_READ_BIT
,
94 &srcMap
, &srcRowStride
);
96 for (row
= 0; row
< height
; row
++) {
97 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
98 width
, height
, format
, type
,
100 const GLubyte
*src
= srcMap
+ row
* srcRowStride
;
101 _mesa_unpack_float_z_row(texImage
->TexFormat
, width
, src
, depthRow
);
102 _mesa_pack_depth_span(ctx
, width
, dest
, type
, depthRow
, &ctx
->Pack
);
105 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
113 * glGetTexImage for depth/stencil pixels.
116 get_tex_depth_stencil(struct gl_context
*ctx
, GLuint dimensions
,
117 GLenum format
, GLenum type
, GLvoid
*pixels
,
118 struct gl_texture_image
*texImage
)
120 const GLint width
= texImage
->Width
;
121 const GLint height
= texImage
->Height
;
122 const GLint depth
= texImage
->Depth
;
125 for (img
= 0; img
< depth
; img
++) {
129 /* map src texture buffer */
130 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
131 0, 0, width
, height
, GL_MAP_READ_BIT
,
132 &srcMap
, &rowstride
);
134 for (row
= 0; row
< height
; row
++) {
135 const GLubyte
*src
= srcMap
+ row
* rowstride
;
136 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
137 width
, height
, format
, type
,
139 /* XXX Z24_S8 vs. S8_Z24??? */
140 memcpy(dest
, src
, width
* sizeof(GLuint
));
141 if (ctx
->Pack
.SwapBytes
) {
142 _mesa_swap4((GLuint
*) dest
, width
);
146 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
152 * glGetTexImage for YCbCr pixels.
155 get_tex_ycbcr(struct gl_context
*ctx
, GLuint dimensions
,
156 GLenum format
, GLenum type
, GLvoid
*pixels
,
157 struct gl_texture_image
*texImage
)
159 const GLint width
= texImage
->Width
;
160 const GLint height
= texImage
->Height
;
161 const GLint depth
= texImage
->Depth
;
164 for (img
= 0; img
< depth
; img
++) {
168 /* map src texture buffer */
169 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
170 0, 0, width
, height
, GL_MAP_READ_BIT
,
171 &srcMap
, &rowstride
);
173 for (row
= 0; row
< height
; row
++) {
174 const GLubyte
*src
= srcMap
+ row
* rowstride
;
175 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
176 width
, height
, format
, type
,
178 memcpy(dest
, src
, width
* sizeof(GLushort
));
180 /* check for byte swapping */
181 if ((texImage
->TexFormat
== MESA_FORMAT_YCBCR
182 && type
== GL_UNSIGNED_SHORT_8_8_REV_MESA
) ||
183 (texImage
->TexFormat
== MESA_FORMAT_YCBCR_REV
184 && type
== GL_UNSIGNED_SHORT_8_8_MESA
)) {
185 if (!ctx
->Pack
.SwapBytes
)
186 _mesa_swap2((GLushort
*) dest
, width
);
188 else if (ctx
->Pack
.SwapBytes
) {
189 _mesa_swap2((GLushort
*) dest
, width
);
193 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
199 * glGetTexImage for color formats (RGBA, RGB, alpha, LA, etc).
200 * Compressed textures are handled here as well.
203 get_tex_rgba(struct gl_context
*ctx
, GLuint dimensions
,
204 GLenum format
, GLenum type
, GLvoid
*pixels
,
205 struct gl_texture_image
*texImage
)
207 /* don't want to apply sRGB -> RGB conversion here so override the format */
208 const gl_format texFormat
= _mesa_get_srgb_format_linear(texImage
->TexFormat
);
209 const GLuint width
= texImage
->Width
;
210 const GLuint height
= texImage
->Height
;
211 const GLuint depth
= texImage
->Depth
;
212 const GLenum dataType
= _mesa_get_format_datatype(texFormat
);
213 const GLenum baseFormat
= _mesa_get_format_base_format(texFormat
);
214 /* Normally, no pixel transfer ops are performed during glGetTexImage.
215 * The only possible exception is component clamping to [0,1].
217 GLbitfield transferOps
= 0x0;
219 /* In general, clamping does not apply to glGetTexImage, except when
220 * the returned type of the image can't hold negative values.
222 if (!type_with_negative_values(type
)) {
223 /* the returned image type can't have negative values */
224 if (dataType
== GL_FLOAT
||
225 dataType
== GL_SIGNED_NORMALIZED
||
226 format
== GL_LUMINANCE
||
227 format
== GL_LUMINANCE_ALPHA
) {
228 transferOps
|= IMAGE_CLAMP_BIT
;
232 if (_mesa_is_format_compressed(texFormat
)) {
233 /* Decompress into temp buffer, then pack into user buffer */
234 GLfloat
*tempImage
, *srcRow
;
237 tempImage
= (GLfloat
*) malloc(texImage
->Width
* texImage
->Height
*
238 texImage
->Depth
* 4 * sizeof(GLfloat
));
240 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage()");
244 /* Decompress the texture image - results in 'tempImage' */
248 GLuint bytes
, bw
, bh
;
250 bytes
= _mesa_get_format_bytes(texImage
->TexFormat
);
251 _mesa_get_format_block_size(texImage
->TexFormat
, &bw
, &bh
);
253 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
256 &srcMap
, &srcRowStride
);
258 /* XXX This line is a bit of a hack to work around the
259 * mismatch of compressed row strides as returned by
260 * MapTextureImage() vs. what the texture decompression code
261 * uses. This will be fixed in the future.
263 srcRowStride
= srcRowStride
* bh
/ bytes
;
265 _mesa_decompress_image(texFormat
, width
, height
,
266 srcMap
, srcRowStride
, tempImage
);
268 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
271 if (baseFormat
== GL_LUMINANCE
||
272 baseFormat
== GL_LUMINANCE_ALPHA
) {
273 /* Set green and blue to zero since the pack function here will
277 for (i
= 0; i
< width
* height
; i
++) {
278 tempImage
[i
* 4 + GCOMP
] = tempImage
[i
* 4 + BCOMP
] = 0.0f
;
283 for (row
= 0; row
< height
; row
++) {
284 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
285 width
, height
, format
, type
,
288 _mesa_pack_rgba_span_float(ctx
, width
, (GLfloat (*)[4]) srcRow
,
289 format
, type
, dest
, &ctx
->Pack
, transferOps
);
296 /* No decompression needed */
300 rgba
= (GLfloat (*)[4]) malloc(4 * width
* sizeof(GLfloat
));
302 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage()");
306 for (img
= 0; img
< depth
; img
++) {
310 /* map src texture buffer */
311 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
312 0, 0, width
, height
, GL_MAP_READ_BIT
,
313 &srcMap
, &rowstride
);
315 for (row
= 0; row
< height
; row
++) {
316 const GLubyte
*src
= srcMap
+ row
* rowstride
;
317 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
318 width
, height
, format
, type
,
321 _mesa_unpack_rgba_row(texFormat
, width
, src
, rgba
);
323 if (texImage
->_BaseFormat
== GL_ALPHA
) {
325 for (col
= 0; col
< width
; col
++) {
326 rgba
[col
][RCOMP
] = 0.0F
;
327 rgba
[col
][GCOMP
] = 0.0F
;
328 rgba
[col
][BCOMP
] = 0.0F
;
331 else if (texImage
->_BaseFormat
== GL_LUMINANCE
) {
333 for (col
= 0; col
< width
; col
++) {
334 rgba
[col
][GCOMP
] = 0.0F
;
335 rgba
[col
][BCOMP
] = 0.0F
;
336 rgba
[col
][ACOMP
] = 1.0F
;
339 else if (texImage
->_BaseFormat
== GL_LUMINANCE_ALPHA
) {
341 for (col
= 0; col
< width
; col
++) {
342 rgba
[col
][GCOMP
] = 0.0F
;
343 rgba
[col
][BCOMP
] = 0.0F
;
346 else if (texImage
->_BaseFormat
== GL_INTENSITY
) {
348 for (col
= 0; col
< width
; col
++) {
349 rgba
[col
][GCOMP
] = 0.0F
;
350 rgba
[col
][BCOMP
] = 0.0F
;
351 rgba
[col
][ACOMP
] = 1.0F
;
355 _mesa_pack_rgba_span_float(ctx
, width
, (GLfloat (*)[4]) rgba
,
357 &ctx
->Pack
, transferOps
);
360 /* Unmap the src texture buffer */
361 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
370 * Try to do glGetTexImage() with simple memcpy().
371 * \return GL_TRUE if done, GL_FALSE otherwise
374 get_tex_memcpy(struct gl_context
*ctx
, GLenum format
, GLenum type
,
376 struct gl_texture_image
*texImage
)
378 const GLenum target
= texImage
->TexObject
->Target
;
379 GLboolean memCopy
= GL_FALSE
;
382 * Check if the src/dst formats are compatible.
383 * Also note that GL's pixel transfer ops don't apply to glGetTexImage()
384 * so we don't have to worry about those.
385 * XXX more format combinations could be supported here.
387 if ((target
== GL_TEXTURE_1D
||
388 target
== GL_TEXTURE_2D
||
389 target
== GL_TEXTURE_RECTANGLE
||
390 (target
>= GL_TEXTURE_CUBE_MAP_POSITIVE_X
&&
391 target
<= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z
))) {
392 if ((texImage
->TexFormat
== MESA_FORMAT_ARGB8888
||
393 texImage
->TexFormat
== MESA_FORMAT_SARGB8
) &&
395 (type
== GL_UNSIGNED_BYTE
|| type
== GL_UNSIGNED_INT_8_8_8_8_REV
) &&
396 !ctx
->Pack
.SwapBytes
&&
397 _mesa_little_endian()) {
400 else if ((texImage
->TexFormat
== MESA_FORMAT_AL88
||
401 texImage
->TexFormat
== MESA_FORMAT_SLA8
) &&
402 format
== GL_LUMINANCE_ALPHA
&&
403 type
== GL_UNSIGNED_BYTE
&&
404 !ctx
->Pack
.SwapBytes
&&
405 _mesa_little_endian()) {
408 else if ((texImage
->TexFormat
== MESA_FORMAT_L8
||
409 texImage
->TexFormat
== MESA_FORMAT_SL8
) &&
410 format
== GL_LUMINANCE
&&
411 type
== GL_UNSIGNED_BYTE
) {
414 else if (texImage
->TexFormat
== MESA_FORMAT_L16
&&
415 format
== GL_LUMINANCE
&&
416 type
== GL_UNSIGNED_SHORT
) {
419 else if (texImage
->TexFormat
== MESA_FORMAT_A8
&&
420 format
== GL_ALPHA
&&
421 type
== GL_UNSIGNED_BYTE
) {
424 else if (texImage
->TexFormat
== MESA_FORMAT_A16
&&
425 format
== GL_ALPHA
&&
426 type
== GL_UNSIGNED_SHORT
) {
432 const GLuint bpp
= _mesa_get_format_bytes(texImage
->TexFormat
);
433 const GLuint bytesPerRow
= texImage
->Width
* bpp
;
435 _mesa_image_address2d(&ctx
->Pack
, pixels
, texImage
->Width
,
436 texImage
->Height
, format
, type
, 0, 0);
437 const GLint dstRowStride
=
438 _mesa_image_row_stride(&ctx
->Pack
, texImage
->Width
, format
, type
);
442 /* map src texture buffer */
443 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
444 0, 0, texImage
->Width
, texImage
->Height
,
445 GL_MAP_READ_BIT
, &src
, &srcRowStride
);
447 if (bytesPerRow
== dstRowStride
&& bytesPerRow
== srcRowStride
) {
448 memcpy(dst
, src
, bytesPerRow
* texImage
->Height
);
452 for (row
= 0; row
< texImage
->Height
; row
++) {
453 memcpy(dst
, src
, bytesPerRow
);
459 /* unmap src texture buffer */
460 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
468 * This is the software fallback for Driver.GetTexImage().
469 * All error checking will have been done before this routine is called.
470 * We'll call ctx->Driver.MapTextureImage() to access the data, then
471 * unmap with ctx->Driver.UnmapTextureImage().
474 _mesa_get_teximage(struct gl_context
*ctx
,
475 GLenum format
, GLenum type
, GLvoid
*pixels
,
476 struct gl_texture_image
*texImage
)
480 switch (texImage
->TexObject
->Target
) {
491 /* map dest buffer, if PBO */
492 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
493 /* Packing texture image into a PBO.
494 * Map the (potentially) VRAM-based buffer into our process space so
495 * we can write into it with the code below.
496 * A hardware driver might use a sophisticated blit to move the
497 * texture data to the PBO if the PBO is in VRAM along with the texture.
499 GLubyte
*buf
= (GLubyte
*)
500 ctx
->Driver
.MapBufferRange(ctx
, 0, ctx
->Pack
.BufferObj
->Size
,
501 GL_MAP_WRITE_BIT
, ctx
->Pack
.BufferObj
);
503 /* out of memory or other unexpected error */
504 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage(map PBO failed)");
507 /* <pixels> was an offset into the PBO.
508 * Now make it a real, client-side pointer inside the mapped region.
510 pixels
= ADD_POINTERS(buf
, pixels
);
513 if (get_tex_memcpy(ctx
, format
, type
, pixels
, texImage
)) {
516 else if (format
== GL_DEPTH_COMPONENT
) {
517 get_tex_depth(ctx
, dimensions
, format
, type
, pixels
, texImage
);
519 else if (format
== GL_DEPTH_STENCIL_EXT
) {
520 get_tex_depth_stencil(ctx
, dimensions
, format
, type
, pixels
, texImage
);
522 else if (format
== GL_YCBCR_MESA
) {
523 get_tex_ycbcr(ctx
, dimensions
, format
, type
, pixels
, texImage
);
526 get_tex_rgba(ctx
, dimensions
, format
, type
, pixels
, texImage
);
529 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
530 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Pack
.BufferObj
);
537 * This is the software fallback for Driver.GetCompressedTexImage().
538 * All error checking will have been done before this routine is called.
541 _mesa_get_compressed_teximage(struct gl_context
*ctx
, GLenum target
, GLint level
,
543 struct gl_texture_object
*texObj
,
544 struct gl_texture_image
*texImage
)
546 const GLuint row_stride
=
547 _mesa_format_row_stride(texImage
->TexFormat
, texImage
->Width
);
552 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
553 /* pack texture image into a PBO */
554 GLubyte
*buf
= (GLubyte
*)
555 ctx
->Driver
.MapBufferRange(ctx
, 0, ctx
->Pack
.BufferObj
->Size
,
556 GL_MAP_WRITE_BIT
, ctx
->Pack
.BufferObj
);
558 /* out of memory or other unexpected error */
559 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
560 "glGetCompresssedTexImage(map PBO failed)");
563 img
= ADD_POINTERS(buf
, img
);
566 /* map src texture buffer */
567 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
568 0, 0, texImage
->Width
, texImage
->Height
,
569 GL_MAP_READ_BIT
, &src
, &srcRowStride
);
571 /* no pixelstore or pixel transfer, but respect stride */
573 if (row_stride
== srcRowStride
) {
574 const GLuint size
= _mesa_format_image_size(texImage
->TexFormat
,
578 memcpy(img
, src
, size
);
582 _mesa_get_format_block_size(texImage
->TexFormat
, &bw
, &bh
);
583 for (i
= 0; i
< (texImage
->Height
+ bh
- 1) / bh
; i
++) {
584 memcpy((GLubyte
*)img
+ i
* row_stride
,
585 (GLubyte
*)src
+ i
* srcRowStride
,
590 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
592 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
593 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Pack
.BufferObj
);
600 * Do error checking for a glGetTexImage() call.
601 * \return GL_TRUE if any error, GL_FALSE if no errors.
604 getteximage_error_check(struct gl_context
*ctx
, GLenum target
, GLint level
,
605 GLenum format
, GLenum type
, GLsizei clientMemSize
,
608 struct gl_texture_object
*texObj
;
609 struct gl_texture_image
*texImage
;
610 const GLint maxLevels
= _mesa_max_texture_levels(ctx
, target
);
611 const GLuint dimensions
= (target
== GL_TEXTURE_3D
) ? 3 : 2;
614 if (maxLevels
== 0) {
615 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(target=0x%x)", target
);
619 if (level
< 0 || level
>= maxLevels
) {
620 _mesa_error( ctx
, GL_INVALID_VALUE
, "glGetTexImage(level)" );
624 if (_mesa_sizeof_packed_type(type
) <= 0) {
625 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexImage(type)" );
629 if (_mesa_components_in_format(format
) <= 0 ||
630 format
== GL_STENCIL_INDEX
||
631 format
== GL_COLOR_INDEX
) {
632 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)" );
636 if (!ctx
->Extensions
.ARB_depth_texture
&& _mesa_is_depth_format(format
)) {
637 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
641 if (!ctx
->Extensions
.MESA_ycbcr_texture
&& _mesa_is_ycbcr_format(format
)) {
642 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
646 if (!ctx
->Extensions
.EXT_packed_depth_stencil
647 && _mesa_is_depthstencil_format(format
)) {
648 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
652 if (!ctx
->Extensions
.ATI_envmap_bumpmap
653 && _mesa_is_dudv_format(format
)) {
654 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
658 texObj
= _mesa_get_current_tex_object(ctx
, target
);
660 if (!texObj
|| _mesa_is_proxy_texture(target
)) {
661 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(target)");
665 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
671 baseFormat
= _mesa_get_format_base_format(texImage
->TexFormat
);
673 /* Make sure the requested image format is compatible with the
676 if (_mesa_is_color_format(format
)
677 && !_mesa_is_color_format(baseFormat
)) {
678 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
681 else if (_mesa_is_depth_format(format
)
682 && !_mesa_is_depth_format(baseFormat
)
683 && !_mesa_is_depthstencil_format(baseFormat
)) {
684 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
687 else if (_mesa_is_ycbcr_format(format
)
688 && !_mesa_is_ycbcr_format(baseFormat
)) {
689 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
692 else if (_mesa_is_depthstencil_format(format
)
693 && !_mesa_is_depthstencil_format(baseFormat
)) {
694 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
697 else if (_mesa_is_dudv_format(format
)
698 && !_mesa_is_dudv_format(baseFormat
)) {
699 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
703 if (!_mesa_validate_pbo_access(dimensions
, &ctx
->Pack
, texImage
->Width
,
704 texImage
->Height
, texImage
->Depth
,
705 format
, type
, clientMemSize
, pixels
)) {
706 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
707 _mesa_error(ctx
, GL_INVALID_OPERATION
,
708 "glGetTexImage(out of bounds PBO access)");
710 _mesa_error(ctx
, GL_INVALID_OPERATION
,
711 "glGetnTexImageARB(out of bounds access:"
712 " bufSize (%d) is too small)", clientMemSize
);
717 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
718 /* PBO should not be mapped */
719 if (_mesa_bufferobj_mapped(ctx
->Pack
.BufferObj
)) {
720 _mesa_error(ctx
, GL_INVALID_OPERATION
,
721 "glGetTexImage(PBO is mapped)");
732 * Get texture image. Called by glGetTexImage.
734 * \param target texture target.
735 * \param level image level.
736 * \param format pixel data format for returned image.
737 * \param type pixel data type for returned image.
738 * \param bufSize size of the pixels data buffer.
739 * \param pixels returned pixel data.
742 _mesa_GetnTexImageARB( GLenum target
, GLint level
, GLenum format
,
743 GLenum type
, GLsizei bufSize
, GLvoid
*pixels
)
745 struct gl_texture_object
*texObj
;
746 struct gl_texture_image
*texImage
;
747 GET_CURRENT_CONTEXT(ctx
);
748 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
750 if (getteximage_error_check(ctx
, target
, level
, format
, type
,
755 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !pixels
) {
756 /* not an error, do nothing */
760 texObj
= _mesa_get_current_tex_object(ctx
, target
);
761 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
763 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
764 _mesa_debug(ctx
, "glGetTexImage(tex %u) format = %s, w=%d, h=%d,"
765 " dstFmt=0x%x, dstType=0x%x\n",
767 _mesa_get_format_name(texImage
->TexFormat
),
768 texImage
->Width
, texImage
->Height
,
772 _mesa_lock_texture(ctx
, texObj
);
774 ctx
->Driver
.GetTexImage(ctx
, format
, type
, pixels
, texImage
);
776 _mesa_unlock_texture(ctx
, texObj
);
781 _mesa_GetTexImage( GLenum target
, GLint level
, GLenum format
,
782 GLenum type
, GLvoid
*pixels
)
784 _mesa_GetnTexImageARB(target
, level
, format
, type
, INT_MAX
, pixels
);
789 * Do error checking for a glGetCompressedTexImage() call.
790 * \return GL_TRUE if any error, GL_FALSE if no errors.
793 getcompressedteximage_error_check(struct gl_context
*ctx
, GLenum target
,
794 GLint level
, GLsizei clientMemSize
, GLvoid
*img
)
796 struct gl_texture_object
*texObj
;
797 struct gl_texture_image
*texImage
;
798 const GLint maxLevels
= _mesa_max_texture_levels(ctx
, target
);
799 GLuint compressedSize
;
801 if (maxLevels
== 0) {
802 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetCompressedTexImage(target=0x%x)",
807 if (level
< 0 || level
>= maxLevels
) {
808 _mesa_error(ctx
, GL_INVALID_VALUE
,
809 "glGetCompressedTexImageARB(bad level = %d)", level
);
813 if (_mesa_is_proxy_texture(target
)) {
814 _mesa_error(ctx
, GL_INVALID_ENUM
,
815 "glGetCompressedTexImageARB(bad target = %s)",
816 _mesa_lookup_enum_by_nr(target
));
820 texObj
= _mesa_get_current_tex_object(ctx
, target
);
822 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetCompressedTexImageARB(target)");
826 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
829 /* probably invalid mipmap level */
830 _mesa_error(ctx
, GL_INVALID_VALUE
,
831 "glGetCompressedTexImageARB(level)");
835 if (!_mesa_is_format_compressed(texImage
->TexFormat
)) {
836 _mesa_error(ctx
, GL_INVALID_OPERATION
,
837 "glGetCompressedTexImageARB(texture is not compressed)");
841 compressedSize
= _mesa_format_image_size(texImage
->TexFormat
,
846 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
847 /* do bounds checking on writing to client memory */
848 if (clientMemSize
< compressedSize
) {
849 _mesa_error(ctx
, GL_INVALID_OPERATION
,
850 "glGetnCompressedTexImageARB(out of bounds access:"
851 " bufSize (%d) is too small)", clientMemSize
);
854 /* do bounds checking on PBO write */
855 if ((const GLubyte
*) img
+ compressedSize
>
856 (const GLubyte
*) ctx
->Pack
.BufferObj
->Size
) {
857 _mesa_error(ctx
, GL_INVALID_OPERATION
,
858 "glGetCompressedTexImage(out of bounds PBO access)");
862 /* make sure PBO is not mapped */
863 if (_mesa_bufferobj_mapped(ctx
->Pack
.BufferObj
)) {
864 _mesa_error(ctx
, GL_INVALID_OPERATION
,
865 "glGetCompressedTexImage(PBO is mapped)");
875 _mesa_GetnCompressedTexImageARB(GLenum target
, GLint level
, GLsizei bufSize
,
878 struct gl_texture_object
*texObj
;
879 struct gl_texture_image
*texImage
;
880 GET_CURRENT_CONTEXT(ctx
);
881 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
883 if (getcompressedteximage_error_check(ctx
, target
, level
, bufSize
, img
)) {
887 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !img
) {
888 /* not an error, do nothing */
892 texObj
= _mesa_get_current_tex_object(ctx
, target
);
893 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
895 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
897 "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n",
899 _mesa_get_format_name(texImage
->TexFormat
),
900 texImage
->Width
, texImage
->Height
);
903 _mesa_lock_texture(ctx
, texObj
);
905 ctx
->Driver
.GetCompressedTexImage(ctx
, target
, level
, img
,
908 _mesa_unlock_texture(ctx
, texObj
);
912 _mesa_GetCompressedTexImageARB(GLenum target
, GLint level
, GLvoid
*img
)
914 _mesa_GetnCompressedTexImageARB(target
, level
, INT_MAX
, img
);