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
);
98 for (row
= 0; row
< height
; row
++) {
99 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
100 width
, height
, format
, type
,
102 const GLubyte
*src
= srcMap
+ row
* srcRowStride
;
103 _mesa_unpack_float_z_row(texImage
->TexFormat
, width
, src
, depthRow
);
104 _mesa_pack_depth_span(ctx
, width
, dest
, type
, depthRow
, &ctx
->Pack
);
107 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
115 * glGetTexImage for depth/stencil pixels.
118 get_tex_depth_stencil(struct gl_context
*ctx
, GLuint dimensions
,
119 GLenum format
, GLenum type
, GLvoid
*pixels
,
120 struct gl_texture_image
*texImage
)
122 const GLint width
= texImage
->Width
;
123 const GLint height
= texImage
->Height
;
124 const GLint depth
= texImage
->Depth
;
127 for (img
= 0; img
< depth
; img
++) {
131 /* map src texture buffer */
132 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
133 0, 0, width
, height
, GL_MAP_READ_BIT
,
134 &srcMap
, &rowstride
);
136 for (row
= 0; row
< height
; row
++) {
137 const GLubyte
*src
= srcMap
+ row
* rowstride
;
138 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
139 width
, height
, format
, type
,
141 /* XXX Z24_S8 vs. S8_Z24??? */
142 memcpy(dest
, src
, width
* sizeof(GLuint
));
143 if (ctx
->Pack
.SwapBytes
) {
144 _mesa_swap4((GLuint
*) dest
, width
);
148 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
154 * glGetTexImage for YCbCr pixels.
157 get_tex_ycbcr(struct gl_context
*ctx
, GLuint dimensions
,
158 GLenum format
, GLenum type
, GLvoid
*pixels
,
159 struct gl_texture_image
*texImage
)
161 const GLint width
= texImage
->Width
;
162 const GLint height
= texImage
->Height
;
163 const GLint depth
= texImage
->Depth
;
166 for (img
= 0; img
< depth
; img
++) {
170 /* map src texture buffer */
171 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
172 0, 0, width
, height
, GL_MAP_READ_BIT
,
173 &srcMap
, &rowstride
);
175 for (row
= 0; row
< height
; row
++) {
176 const GLubyte
*src
= srcMap
+ row
* rowstride
;
177 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
178 width
, height
, format
, type
,
180 memcpy(dest
, src
, width
* sizeof(GLushort
));
182 /* check for byte swapping */
183 if ((texImage
->TexFormat
== MESA_FORMAT_YCBCR
184 && type
== GL_UNSIGNED_SHORT_8_8_REV_MESA
) ||
185 (texImage
->TexFormat
== MESA_FORMAT_YCBCR_REV
186 && type
== GL_UNSIGNED_SHORT_8_8_MESA
)) {
187 if (!ctx
->Pack
.SwapBytes
)
188 _mesa_swap2((GLushort
*) dest
, width
);
190 else if (ctx
->Pack
.SwapBytes
) {
191 _mesa_swap2((GLushort
*) dest
, width
);
195 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
201 * glGetTexImage for color formats (RGBA, RGB, alpha, LA, etc).
202 * Compressed textures are handled here as well.
205 get_tex_rgba(struct gl_context
*ctx
, GLuint dimensions
,
206 GLenum format
, GLenum type
, GLvoid
*pixels
,
207 struct gl_texture_image
*texImage
)
209 /* don't want to apply sRGB -> RGB conversion here so override the format */
210 const gl_format texFormat
= _mesa_get_srgb_format_linear(texImage
->TexFormat
);
211 const GLuint width
= texImage
->Width
;
212 const GLuint height
= texImage
->Height
;
213 const GLuint depth
= texImage
->Depth
;
214 const GLenum dataType
= _mesa_get_format_datatype(texFormat
);
215 const GLenum baseFormat
= _mesa_get_format_base_format(texFormat
);
216 /* Normally, no pixel transfer ops are performed during glGetTexImage.
217 * The only possible exception is component clamping to [0,1].
219 GLbitfield transferOps
= 0x0;
221 /* In general, clamping does not apply to glGetTexImage, except when
222 * the returned type of the image can't hold negative values.
224 if (type_needs_clamping(type
)) {
225 /* the returned image type can't have negative values */
226 if (dataType
== GL_FLOAT
||
227 dataType
== GL_SIGNED_NORMALIZED
||
228 format
== GL_LUMINANCE
||
229 format
== GL_LUMINANCE_ALPHA
) {
230 transferOps
|= IMAGE_CLAMP_BIT
;
234 if (_mesa_is_format_compressed(texFormat
)) {
235 /* Decompress into temp buffer, then pack into user buffer */
236 GLfloat
*tempImage
, *srcRow
;
239 tempImage
= (GLfloat
*) malloc(texImage
->Width
* texImage
->Height
*
240 texImage
->Depth
* 4 * sizeof(GLfloat
));
242 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage()");
246 /* Decompress the texture image - results in 'tempImage' */
250 GLuint bytes
, bw
, bh
;
252 bytes
= _mesa_get_format_bytes(texImage
->TexFormat
);
253 _mesa_get_format_block_size(texImage
->TexFormat
, &bw
, &bh
);
255 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
258 &srcMap
, &srcRowStride
);
260 /* XXX This line is a bit of a hack to work around the
261 * mismatch of compressed row strides as returned by
262 * MapTextureImage() vs. what the texture decompression code
263 * uses. This will be fixed in the future.
265 srcRowStride
= srcRowStride
* bh
/ bytes
;
267 _mesa_decompress_image(texFormat
, width
, height
,
268 srcMap
, srcRowStride
, tempImage
);
270 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
273 if (baseFormat
== GL_LUMINANCE
||
274 baseFormat
== GL_LUMINANCE_ALPHA
) {
275 /* Set green and blue to zero since the pack function here will
279 for (i
= 0; i
< width
* height
; i
++) {
280 tempImage
[i
* 4 + GCOMP
] = tempImage
[i
* 4 + BCOMP
] = 0.0f
;
285 for (row
= 0; row
< height
; row
++) {
286 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
287 width
, height
, format
, type
,
290 _mesa_pack_rgba_span_float(ctx
, width
, (GLfloat (*)[4]) srcRow
,
291 format
, type
, dest
, &ctx
->Pack
, transferOps
);
298 /* No decompression needed */
302 rgba
= (GLfloat (*)[4]) malloc(4 * width
* sizeof(GLfloat
));
304 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage()");
308 for (img
= 0; img
< depth
; img
++) {
312 /* map src texture buffer */
313 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
314 0, 0, width
, height
, GL_MAP_READ_BIT
,
315 &srcMap
, &rowstride
);
317 for (row
= 0; row
< height
; row
++) {
318 const GLubyte
*src
= srcMap
+ row
* rowstride
;
319 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
320 width
, height
, format
, type
,
323 _mesa_unpack_rgba_row(texFormat
, width
, src
, rgba
);
325 if (texImage
->_BaseFormat
== GL_ALPHA
) {
327 for (col
= 0; col
< width
; col
++) {
328 rgba
[col
][RCOMP
] = 0.0F
;
329 rgba
[col
][GCOMP
] = 0.0F
;
330 rgba
[col
][BCOMP
] = 0.0F
;
333 else if (texImage
->_BaseFormat
== GL_LUMINANCE
) {
335 for (col
= 0; col
< width
; col
++) {
336 rgba
[col
][GCOMP
] = 0.0F
;
337 rgba
[col
][BCOMP
] = 0.0F
;
338 rgba
[col
][ACOMP
] = 1.0F
;
341 else if (texImage
->_BaseFormat
== GL_LUMINANCE_ALPHA
) {
343 for (col
= 0; col
< width
; col
++) {
344 rgba
[col
][GCOMP
] = 0.0F
;
345 rgba
[col
][BCOMP
] = 0.0F
;
348 else if (texImage
->_BaseFormat
== GL_INTENSITY
) {
350 for (col
= 0; col
< width
; col
++) {
351 rgba
[col
][GCOMP
] = 0.0F
;
352 rgba
[col
][BCOMP
] = 0.0F
;
353 rgba
[col
][ACOMP
] = 1.0F
;
357 _mesa_pack_rgba_span_float(ctx
, width
, (GLfloat (*)[4]) rgba
,
359 &ctx
->Pack
, transferOps
);
362 /* Unmap the src texture buffer */
363 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
372 * Try to do glGetTexImage() with simple memcpy().
373 * \return GL_TRUE if done, GL_FALSE otherwise
376 get_tex_memcpy(struct gl_context
*ctx
, GLenum format
, GLenum type
,
378 struct gl_texture_image
*texImage
)
380 const GLenum target
= texImage
->TexObject
->Target
;
381 GLboolean memCopy
= GL_FALSE
;
384 * Check if the src/dst formats are compatible.
385 * Also note that GL's pixel transfer ops don't apply to glGetTexImage()
386 * so we don't have to worry about those.
387 * XXX more format combinations could be supported here.
389 if (target
== GL_TEXTURE_1D
||
390 target
== GL_TEXTURE_2D
||
391 target
== GL_TEXTURE_RECTANGLE
||
392 _mesa_is_cube_face(target
)) {
393 if ((texImage
->TexFormat
== MESA_FORMAT_ARGB8888
||
394 texImage
->TexFormat
== MESA_FORMAT_SARGB8
) &&
396 (type
== GL_UNSIGNED_BYTE
|| type
== GL_UNSIGNED_INT_8_8_8_8_REV
) &&
397 !ctx
->Pack
.SwapBytes
&&
398 _mesa_little_endian()) {
401 else if ((texImage
->TexFormat
== MESA_FORMAT_AL88
||
402 texImage
->TexFormat
== MESA_FORMAT_SLA8
) &&
403 format
== GL_LUMINANCE_ALPHA
&&
404 type
== GL_UNSIGNED_BYTE
&&
405 !ctx
->Pack
.SwapBytes
&&
406 _mesa_little_endian()) {
409 else if ((texImage
->TexFormat
== MESA_FORMAT_L8
||
410 texImage
->TexFormat
== MESA_FORMAT_SL8
) &&
411 format
== GL_LUMINANCE
&&
412 type
== GL_UNSIGNED_BYTE
) {
415 else if (texImage
->TexFormat
== MESA_FORMAT_L16
&&
416 format
== GL_LUMINANCE
&&
417 type
== GL_UNSIGNED_SHORT
) {
420 else if (texImage
->TexFormat
== MESA_FORMAT_A8
&&
421 format
== GL_ALPHA
&&
422 type
== GL_UNSIGNED_BYTE
) {
425 else if (texImage
->TexFormat
== MESA_FORMAT_A16
&&
426 format
== GL_ALPHA
&&
427 type
== GL_UNSIGNED_SHORT
) {
433 const GLuint bpp
= _mesa_get_format_bytes(texImage
->TexFormat
);
434 const GLuint bytesPerRow
= texImage
->Width
* bpp
;
436 _mesa_image_address2d(&ctx
->Pack
, pixels
, texImage
->Width
,
437 texImage
->Height
, format
, type
, 0, 0);
438 const GLint dstRowStride
=
439 _mesa_image_row_stride(&ctx
->Pack
, texImage
->Width
, format
, type
);
443 /* map src texture buffer */
444 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
445 0, 0, texImage
->Width
, texImage
->Height
,
446 GL_MAP_READ_BIT
, &src
, &srcRowStride
);
448 if (bytesPerRow
== dstRowStride
&& bytesPerRow
== srcRowStride
) {
449 memcpy(dst
, src
, bytesPerRow
* texImage
->Height
);
453 for (row
= 0; row
< texImage
->Height
; row
++) {
454 memcpy(dst
, src
, bytesPerRow
);
460 /* unmap src texture buffer */
461 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
469 * This is the software fallback for Driver.GetTexImage().
470 * All error checking will have been done before this routine is called.
471 * We'll call ctx->Driver.MapTextureImage() to access the data, then
472 * unmap with ctx->Driver.UnmapTextureImage().
475 _mesa_get_teximage(struct gl_context
*ctx
,
476 GLenum format
, GLenum type
, GLvoid
*pixels
,
477 struct gl_texture_image
*texImage
)
481 switch (texImage
->TexObject
->Target
) {
492 /* map dest buffer, if PBO */
493 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
494 /* Packing texture image into a PBO.
495 * Map the (potentially) VRAM-based buffer into our process space so
496 * we can write into it with the code below.
497 * A hardware driver might use a sophisticated blit to move the
498 * texture data to the PBO if the PBO is in VRAM along with the texture.
500 GLubyte
*buf
= (GLubyte
*)
501 ctx
->Driver
.MapBufferRange(ctx
, 0, ctx
->Pack
.BufferObj
->Size
,
502 GL_MAP_WRITE_BIT
, ctx
->Pack
.BufferObj
);
504 /* out of memory or other unexpected error */
505 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage(map PBO failed)");
508 /* <pixels> was an offset into the PBO.
509 * Now make it a real, client-side pointer inside the mapped region.
511 pixels
= ADD_POINTERS(buf
, pixels
);
514 if (get_tex_memcpy(ctx
, format
, type
, pixels
, texImage
)) {
517 else if (format
== GL_DEPTH_COMPONENT
) {
518 get_tex_depth(ctx
, dimensions
, format
, type
, pixels
, texImage
);
520 else if (format
== GL_DEPTH_STENCIL_EXT
) {
521 get_tex_depth_stencil(ctx
, dimensions
, format
, type
, pixels
, texImage
);
523 else if (format
== GL_YCBCR_MESA
) {
524 get_tex_ycbcr(ctx
, dimensions
, format
, type
, pixels
, texImage
);
527 get_tex_rgba(ctx
, dimensions
, format
, type
, pixels
, texImage
);
530 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
531 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Pack
.BufferObj
);
538 * This is the software fallback for Driver.GetCompressedTexImage().
539 * All error checking will have been done before this routine is called.
542 _mesa_get_compressed_teximage(struct gl_context
*ctx
, GLenum target
, GLint level
,
544 struct gl_texture_object
*texObj
,
545 struct gl_texture_image
*texImage
)
547 const GLuint row_stride
=
548 _mesa_format_row_stride(texImage
->TexFormat
, texImage
->Width
);
553 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
554 /* pack texture image into a PBO */
555 GLubyte
*buf
= (GLubyte
*)
556 ctx
->Driver
.MapBufferRange(ctx
, 0, ctx
->Pack
.BufferObj
->Size
,
557 GL_MAP_WRITE_BIT
, ctx
->Pack
.BufferObj
);
559 /* out of memory or other unexpected error */
560 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
561 "glGetCompresssedTexImage(map PBO failed)");
564 img
= ADD_POINTERS(buf
, img
);
567 /* map src texture buffer */
568 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
569 0, 0, texImage
->Width
, texImage
->Height
,
570 GL_MAP_READ_BIT
, &src
, &srcRowStride
);
572 /* no pixelstore or pixel transfer, but respect stride */
574 if (row_stride
== srcRowStride
) {
575 const GLuint size
= _mesa_format_image_size(texImage
->TexFormat
,
579 memcpy(img
, src
, size
);
583 _mesa_get_format_block_size(texImage
->TexFormat
, &bw
, &bh
);
584 for (i
= 0; i
< (texImage
->Height
+ bh
- 1) / bh
; i
++) {
585 memcpy((GLubyte
*)img
+ i
* row_stride
,
586 (GLubyte
*)src
+ i
* srcRowStride
,
591 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
593 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
594 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Pack
.BufferObj
);
601 * Do error checking for a glGetTexImage() call.
602 * \return GL_TRUE if any error, GL_FALSE if no errors.
605 getteximage_error_check(struct gl_context
*ctx
, GLenum target
, GLint level
,
606 GLenum format
, GLenum type
, GLsizei clientMemSize
,
609 struct gl_texture_object
*texObj
;
610 struct gl_texture_image
*texImage
;
611 const GLint maxLevels
= _mesa_max_texture_levels(ctx
, target
);
612 const GLuint dimensions
= (target
== GL_TEXTURE_3D
) ? 3 : 2;
615 if (maxLevels
== 0) {
616 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(target=0x%x)", target
);
620 if (level
< 0 || level
>= maxLevels
) {
621 _mesa_error( ctx
, GL_INVALID_VALUE
, "glGetTexImage(level)" );
625 if (_mesa_sizeof_packed_type(type
) <= 0) {
626 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexImage(type)" );
630 if (_mesa_components_in_format(format
) <= 0 ||
631 format
== GL_STENCIL_INDEX
||
632 format
== GL_COLOR_INDEX
) {
633 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)" );
637 if (!ctx
->Extensions
.ARB_depth_texture
&& _mesa_is_depth_format(format
)) {
638 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
642 if (!ctx
->Extensions
.MESA_ycbcr_texture
&& _mesa_is_ycbcr_format(format
)) {
643 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
647 if (!ctx
->Extensions
.EXT_packed_depth_stencil
648 && _mesa_is_depthstencil_format(format
)) {
649 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
653 if (!ctx
->Extensions
.ATI_envmap_bumpmap
654 && _mesa_is_dudv_format(format
)) {
655 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
659 texObj
= _mesa_get_current_tex_object(ctx
, target
);
661 if (!texObj
|| _mesa_is_proxy_texture(target
)) {
662 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(target)");
666 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
672 baseFormat
= _mesa_get_format_base_format(texImage
->TexFormat
);
674 /* Make sure the requested image format is compatible with the
677 if (_mesa_is_color_format(format
)
678 && !_mesa_is_color_format(baseFormat
)) {
679 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
682 else if (_mesa_is_depth_format(format
)
683 && !_mesa_is_depth_format(baseFormat
)
684 && !_mesa_is_depthstencil_format(baseFormat
)) {
685 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
688 else if (_mesa_is_ycbcr_format(format
)
689 && !_mesa_is_ycbcr_format(baseFormat
)) {
690 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
693 else if (_mesa_is_depthstencil_format(format
)
694 && !_mesa_is_depthstencil_format(baseFormat
)) {
695 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
698 else if (_mesa_is_dudv_format(format
)
699 && !_mesa_is_dudv_format(baseFormat
)) {
700 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
704 if (!_mesa_validate_pbo_access(dimensions
, &ctx
->Pack
, texImage
->Width
,
705 texImage
->Height
, texImage
->Depth
,
706 format
, type
, clientMemSize
, pixels
)) {
707 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
708 _mesa_error(ctx
, GL_INVALID_OPERATION
,
709 "glGetTexImage(out of bounds PBO access)");
711 _mesa_error(ctx
, GL_INVALID_OPERATION
,
712 "glGetnTexImageARB(out of bounds access:"
713 " bufSize (%d) is too small)", clientMemSize
);
718 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
719 /* PBO should not be mapped */
720 if (_mesa_bufferobj_mapped(ctx
->Pack
.BufferObj
)) {
721 _mesa_error(ctx
, GL_INVALID_OPERATION
,
722 "glGetTexImage(PBO is mapped)");
733 * Get texture image. Called by glGetTexImage.
735 * \param target texture target.
736 * \param level image level.
737 * \param format pixel data format for returned image.
738 * \param type pixel data type for returned image.
739 * \param bufSize size of the pixels data buffer.
740 * \param pixels returned pixel data.
743 _mesa_GetnTexImageARB( GLenum target
, GLint level
, GLenum format
,
744 GLenum type
, GLsizei bufSize
, GLvoid
*pixels
)
746 struct gl_texture_object
*texObj
;
747 struct gl_texture_image
*texImage
;
748 GET_CURRENT_CONTEXT(ctx
);
749 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
751 if (getteximage_error_check(ctx
, target
, level
, format
, type
,
756 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !pixels
) {
757 /* not an error, do nothing */
761 texObj
= _mesa_get_current_tex_object(ctx
, target
);
762 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
764 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
765 _mesa_debug(ctx
, "glGetTexImage(tex %u) format = %s, w=%d, h=%d,"
766 " dstFmt=0x%x, dstType=0x%x\n",
768 _mesa_get_format_name(texImage
->TexFormat
),
769 texImage
->Width
, texImage
->Height
,
773 _mesa_lock_texture(ctx
, texObj
);
775 ctx
->Driver
.GetTexImage(ctx
, format
, type
, pixels
, texImage
);
777 _mesa_unlock_texture(ctx
, texObj
);
782 _mesa_GetTexImage( GLenum target
, GLint level
, GLenum format
,
783 GLenum type
, GLvoid
*pixels
)
785 _mesa_GetnTexImageARB(target
, level
, format
, type
, INT_MAX
, pixels
);
790 * Do error checking for a glGetCompressedTexImage() call.
791 * \return GL_TRUE if any error, GL_FALSE if no errors.
794 getcompressedteximage_error_check(struct gl_context
*ctx
, GLenum target
,
795 GLint level
, GLsizei clientMemSize
, GLvoid
*img
)
797 struct gl_texture_object
*texObj
;
798 struct gl_texture_image
*texImage
;
799 const GLint maxLevels
= _mesa_max_texture_levels(ctx
, target
);
800 GLuint compressedSize
;
802 if (maxLevels
== 0) {
803 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetCompressedTexImage(target=0x%x)",
808 if (level
< 0 || level
>= maxLevels
) {
809 _mesa_error(ctx
, GL_INVALID_VALUE
,
810 "glGetCompressedTexImageARB(bad level = %d)", level
);
814 if (_mesa_is_proxy_texture(target
)) {
815 _mesa_error(ctx
, GL_INVALID_ENUM
,
816 "glGetCompressedTexImageARB(bad target = %s)",
817 _mesa_lookup_enum_by_nr(target
));
821 texObj
= _mesa_get_current_tex_object(ctx
, target
);
823 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetCompressedTexImageARB(target)");
827 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
830 /* probably invalid mipmap level */
831 _mesa_error(ctx
, GL_INVALID_VALUE
,
832 "glGetCompressedTexImageARB(level)");
836 if (!_mesa_is_format_compressed(texImage
->TexFormat
)) {
837 _mesa_error(ctx
, GL_INVALID_OPERATION
,
838 "glGetCompressedTexImageARB(texture is not compressed)");
842 compressedSize
= _mesa_format_image_size(texImage
->TexFormat
,
847 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
848 /* do bounds checking on writing to client memory */
849 if (clientMemSize
< compressedSize
) {
850 _mesa_error(ctx
, GL_INVALID_OPERATION
,
851 "glGetnCompressedTexImageARB(out of bounds access:"
852 " bufSize (%d) is too small)", clientMemSize
);
856 /* do bounds checking on PBO write */
857 if ((const GLubyte
*) img
+ compressedSize
>
858 (const GLubyte
*) ctx
->Pack
.BufferObj
->Size
) {
859 _mesa_error(ctx
, GL_INVALID_OPERATION
,
860 "glGetCompressedTexImage(out of bounds PBO access)");
864 /* make sure PBO is not mapped */
865 if (_mesa_bufferobj_mapped(ctx
->Pack
.BufferObj
)) {
866 _mesa_error(ctx
, GL_INVALID_OPERATION
,
867 "glGetCompressedTexImage(PBO is mapped)");
877 _mesa_GetnCompressedTexImageARB(GLenum target
, GLint level
, GLsizei bufSize
,
880 struct gl_texture_object
*texObj
;
881 struct gl_texture_image
*texImage
;
882 GET_CURRENT_CONTEXT(ctx
);
883 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
885 if (getcompressedteximage_error_check(ctx
, target
, level
, bufSize
, img
)) {
889 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !img
) {
890 /* not an error, do nothing */
894 texObj
= _mesa_get_current_tex_object(ctx
, target
);
895 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
897 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
899 "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n",
901 _mesa_get_format_name(texImage
->TexFormat
),
902 texImage
->Width
, texImage
->Height
);
905 _mesa_lock_texture(ctx
, texObj
);
907 ctx
->Driver
.GetCompressedTexImage(ctx
, target
, level
, img
,
910 _mesa_unlock_texture(ctx
, texObj
);
914 _mesa_GetCompressedTexImageARB(GLenum target
, GLint level
, GLvoid
*img
)
916 _mesa_GetnCompressedTexImageARB(target
, level
, INT_MAX
, img
);