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"
38 #include "mfeatures.h"
42 #include "texgetimage.h"
49 * Can the given type represent negative values?
51 static INLINE GLboolean
52 type_with_negative_values(GLenum type
)
59 case GL_HALF_FLOAT_ARB
:
68 * glGetTexImage for color index pixels.
71 get_tex_color_index(struct gl_context
*ctx
, GLuint dimensions
,
72 GLenum format
, GLenum type
, GLvoid
*pixels
,
73 const struct gl_texture_image
*texImage
)
75 const GLint width
= texImage
->Width
;
76 const GLint height
= texImage
->Height
;
77 const GLint depth
= texImage
->Depth
;
78 const GLint rowstride
= texImage
->RowStride
;
79 const GLuint indexBits
=
80 _mesa_get_format_bits(texImage
->TexFormat
, GL_TEXTURE_INDEX_SIZE_EXT
);
81 const GLbitfield transferOps
= 0x0;
84 for (img
= 0; img
< depth
; img
++) {
85 for (row
= 0; row
< height
; row
++) {
86 GLuint indexRow
[MAX_WIDTH
] = { 0 };
87 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
88 width
, height
, format
, type
,
93 const GLubyte
*src
= (const GLubyte
*) texImage
->Data
;
94 src
+= rowstride
* (img
* height
+ row
);
95 for (col
= 0; col
< width
; col
++) {
96 indexRow
[col
] = src
[col
];
99 else if (indexBits
== 16) {
100 const GLushort
*src
= (const GLushort
*) texImage
->Data
;
101 src
+= rowstride
* (img
* height
+ row
);
102 for (col
= 0; col
< width
; col
++) {
103 indexRow
[col
] = src
[col
];
107 _mesa_problem(ctx
, "Color index problem in _mesa_GetTexImage");
109 _mesa_pack_index_span(ctx
, width
, type
, dest
,
110 indexRow
, &ctx
->Pack
, transferOps
);
117 * glGetTexImage for depth/Z pixels.
120 get_tex_depth(struct gl_context
*ctx
, GLuint dimensions
,
121 GLenum format
, GLenum type
, GLvoid
*pixels
,
122 const struct gl_texture_image
*texImage
)
124 const GLint width
= texImage
->Width
;
125 const GLint height
= texImage
->Height
;
126 const GLint depth
= texImage
->Depth
;
128 GLfloat
*depthRow
= (GLfloat
*) malloc(width
* sizeof(GLfloat
));
131 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
135 for (img
= 0; img
< depth
; img
++) {
136 for (row
= 0; row
< height
; row
++) {
137 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
138 width
, height
, format
, type
,
142 for (col
= 0; col
< width
; col
++) {
143 texImage
->FetchTexelf(texImage
, col
, row
, img
, depthRow
+ col
);
145 _mesa_pack_depth_span(ctx
, width
, dest
, type
, depthRow
, &ctx
->Pack
);
154 * glGetTexImage for depth/stencil pixels.
157 get_tex_depth_stencil(struct gl_context
*ctx
, GLuint dimensions
,
158 GLenum format
, GLenum type
, GLvoid
*pixels
,
159 const struct gl_texture_image
*texImage
)
161 const GLint width
= texImage
->Width
;
162 const GLint height
= texImage
->Height
;
163 const GLint depth
= texImage
->Depth
;
164 const GLint rowstride
= texImage
->RowStride
;
165 const GLuint
*src
= (const GLuint
*) texImage
->Data
;
168 for (img
= 0; img
< depth
; img
++) {
169 for (row
= 0; row
< height
; row
++) {
170 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
171 width
, height
, format
, type
,
173 memcpy(dest
, src
, width
* sizeof(GLuint
));
174 if (ctx
->Pack
.SwapBytes
) {
175 _mesa_swap4((GLuint
*) dest
, width
);
185 * glGetTexImage for YCbCr pixels.
188 get_tex_ycbcr(struct gl_context
*ctx
, GLuint dimensions
,
189 GLenum format
, GLenum type
, GLvoid
*pixels
,
190 const struct gl_texture_image
*texImage
)
192 const GLint width
= texImage
->Width
;
193 const GLint height
= texImage
->Height
;
194 const GLint depth
= texImage
->Depth
;
195 const GLint rowstride
= texImage
->RowStride
;
196 const GLushort
*src
= (const GLushort
*) texImage
->Data
;
199 for (img
= 0; img
< depth
; img
++) {
200 for (row
= 0; row
< height
; row
++) {
201 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
202 width
, height
, format
, type
,
204 memcpy(dest
, src
, width
* sizeof(GLushort
));
206 /* check for byte swapping */
207 if ((texImage
->TexFormat
== MESA_FORMAT_YCBCR
208 && type
== GL_UNSIGNED_SHORT_8_8_REV_MESA
) ||
209 (texImage
->TexFormat
== MESA_FORMAT_YCBCR_REV
210 && type
== GL_UNSIGNED_SHORT_8_8_MESA
)) {
211 if (!ctx
->Pack
.SwapBytes
)
212 _mesa_swap2((GLushort
*) dest
, width
);
214 else if (ctx
->Pack
.SwapBytes
) {
215 _mesa_swap2((GLushort
*) dest
, width
);
225 * glGetTexImage for (s)RGBA, Luminance, etc. pixels.
226 * This is the slow way since we use texture sampling.
229 get_tex_rgba(struct gl_context
*ctx
, GLuint dimensions
,
230 GLenum format
, GLenum type
, GLvoid
*pixels
,
231 struct gl_texture_image
*texImage
)
233 const GLint width
= texImage
->Width
;
234 const GLint height
= texImage
->Height
;
235 const GLint depth
= texImage
->Depth
;
236 const GLenum dataType
= _mesa_get_format_datatype(texImage
->TexFormat
);
237 /* Normally, no pixel transfer ops are performed during glGetTexImage.
238 * The only possible exception is component clamping to [0,1].
240 GLbitfield transferOps
= 0x0;
242 GLfloat (*rgba
)[4] = (GLfloat (*)[4]) malloc(4 * width
* sizeof(GLfloat
));
243 const GLboolean is_sampler_srgb_decode
=
244 _mesa_get_format_color_encoding(texImage
->TexFormat
) == GL_SRGB
&&
245 texImage
->TexObject
->Sampler
.sRGBDecode
== GL_DECODE_EXT
;
248 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
252 /* Clamping does not apply to GetTexImage (final conversion)?
253 * Looks like we need clamp though when going from format
254 * containing negative values to unsigned format.
256 if (format
== GL_LUMINANCE
|| format
== GL_LUMINANCE_ALPHA
) {
257 transferOps
|= IMAGE_CLAMP_BIT
;
259 else if (!type_with_negative_values(type
) &&
260 (dataType
== GL_FLOAT
||
261 dataType
== GL_SIGNED_NORMALIZED
)) {
262 transferOps
|= IMAGE_CLAMP_BIT
;
265 /* glGetTexImage always returns sRGB data for sRGB textures. Make sure the
266 * fetch functions return sRGB data without linearizing it.
268 if (is_sampler_srgb_decode
) {
269 texImage
->TexObject
->Sampler
.sRGBDecode
= GL_SKIP_DECODE_EXT
;
270 _mesa_set_fetch_functions(texImage
, dimensions
);
273 for (img
= 0; img
< depth
; img
++) {
274 for (row
= 0; row
< height
; row
++) {
275 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
276 width
, height
, format
, type
,
280 for (col
= 0; col
< width
; col
++) {
281 texImage
->FetchTexelf(texImage
, col
, row
, img
, rgba
[col
]);
282 if (texImage
->_BaseFormat
== GL_ALPHA
) {
283 rgba
[col
][RCOMP
] = 0.0F
;
284 rgba
[col
][GCOMP
] = 0.0F
;
285 rgba
[col
][BCOMP
] = 0.0F
;
287 else if (texImage
->_BaseFormat
== GL_LUMINANCE
) {
288 rgba
[col
][GCOMP
] = 0.0F
;
289 rgba
[col
][BCOMP
] = 0.0F
;
290 rgba
[col
][ACOMP
] = 1.0F
;
292 else if (texImage
->_BaseFormat
== GL_LUMINANCE_ALPHA
) {
293 rgba
[col
][GCOMP
] = 0.0F
;
294 rgba
[col
][BCOMP
] = 0.0F
;
296 else if (texImage
->_BaseFormat
== GL_INTENSITY
) {
297 rgba
[col
][GCOMP
] = 0.0F
;
298 rgba
[col
][BCOMP
] = 0.0F
;
299 rgba
[col
][ACOMP
] = 1.0F
;
302 _mesa_pack_rgba_span_float(ctx
, width
, (GLfloat (*)[4]) rgba
,
304 &ctx
->Pack
, transferOps
);
308 if (is_sampler_srgb_decode
) {
309 texImage
->TexObject
->Sampler
.sRGBDecode
= GL_DECODE_EXT
;
310 _mesa_set_fetch_functions(texImage
, dimensions
);
318 * Try to do glGetTexImage() with simple memcpy().
319 * \return GL_TRUE if done, GL_FALSE otherwise
322 get_tex_memcpy(struct gl_context
*ctx
, GLenum format
, GLenum type
, GLvoid
*pixels
,
323 const struct gl_texture_object
*texObj
,
324 const struct gl_texture_image
*texImage
)
326 GLboolean memCopy
= GL_FALSE
;
328 /* Texture image should have been mapped already */
329 assert(texImage
->Data
);
332 * Check if the src/dst formats are compatible.
333 * Also note that GL's pixel transfer ops don't apply to glGetTexImage()
334 * so we don't have to worry about those.
335 * XXX more format combinations could be supported here.
337 if ((texObj
->Target
== GL_TEXTURE_1D
||
338 texObj
->Target
== GL_TEXTURE_2D
||
339 texObj
->Target
== GL_TEXTURE_RECTANGLE
||
340 (texObj
->Target
>= GL_TEXTURE_CUBE_MAP_POSITIVE_X
&&
341 texObj
->Target
<= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z
))) {
342 if ((texImage
->TexFormat
== MESA_FORMAT_ARGB8888
||
343 texImage
->TexFormat
== MESA_FORMAT_SARGB8
) &&
345 (type
== GL_UNSIGNED_BYTE
|| type
== GL_UNSIGNED_INT_8_8_8_8_REV
) &&
346 !ctx
->Pack
.SwapBytes
&&
347 _mesa_little_endian()) {
350 else if ((texImage
->TexFormat
== MESA_FORMAT_AL88
||
351 texImage
->TexFormat
== MESA_FORMAT_SLA8
) &&
352 format
== GL_LUMINANCE_ALPHA
&&
353 type
== GL_UNSIGNED_BYTE
&&
354 !ctx
->Pack
.SwapBytes
&&
355 _mesa_little_endian()) {
358 else if ((texImage
->TexFormat
== MESA_FORMAT_L8
||
359 texImage
->TexFormat
== MESA_FORMAT_SL8
) &&
360 format
== GL_LUMINANCE
&&
361 type
== GL_UNSIGNED_BYTE
) {
364 else if (texImage
->TexFormat
== MESA_FORMAT_L16
&&
365 format
== GL_LUMINANCE
&&
366 type
== GL_UNSIGNED_SHORT
) {
369 else if (texImage
->TexFormat
== MESA_FORMAT_A8
&&
370 format
== GL_ALPHA
&&
371 type
== GL_UNSIGNED_BYTE
) {
374 else if (texImage
->TexFormat
== MESA_FORMAT_A16
&&
375 format
== GL_ALPHA
&&
376 type
== GL_UNSIGNED_SHORT
) {
382 const GLuint bpp
= _mesa_get_format_bytes(texImage
->TexFormat
);
383 const GLuint bytesPerRow
= texImage
->Width
* bpp
;
385 _mesa_image_address2d(&ctx
->Pack
, pixels
, texImage
->Width
,
386 texImage
->Height
, format
, type
, 0, 0);
387 const GLint dstRowStride
=
388 _mesa_image_row_stride(&ctx
->Pack
, texImage
->Width
, format
, type
);
389 const GLubyte
*src
= texImage
->Data
;
390 const GLint srcRowStride
= texImage
->RowStride
* bpp
;
393 if (bytesPerRow
== dstRowStride
&& bytesPerRow
== srcRowStride
) {
394 memcpy(dst
, src
, bytesPerRow
* texImage
->Height
);
397 for (row
= 0; row
< texImage
->Height
; row
++) {
398 memcpy(dst
, src
, bytesPerRow
);
410 * This is the software fallback for Driver.GetTexImage().
411 * All error checking will have been done before this routine is called.
412 * The texture image must be mapped.
415 _mesa_get_teximage(struct gl_context
*ctx
, GLenum target
, GLint level
,
416 GLenum format
, GLenum type
, GLvoid
*pixels
,
417 struct gl_texture_object
*texObj
,
418 struct gl_texture_image
*texImage
)
422 /* If we get here, the texture image should be mapped */
423 assert(texImage
->Data
);
436 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
437 /* Packing texture image into a PBO.
438 * Map the (potentially) VRAM-based buffer into our process space so
439 * we can write into it with the code below.
440 * A hardware driver might use a sophisticated blit to move the
441 * texture data to the PBO if the PBO is in VRAM along with the texture.
443 GLubyte
*buf
= (GLubyte
*)
444 ctx
->Driver
.MapBuffer(ctx
, GL_PIXEL_PACK_BUFFER_EXT
,
445 GL_WRITE_ONLY_ARB
, ctx
->Pack
.BufferObj
);
447 /* out of memory or other unexpected error */
448 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage(map PBO failed)");
451 /* <pixels> was an offset into the PBO.
452 * Now make it a real, client-side pointer inside the mapped region.
454 pixels
= ADD_POINTERS(buf
, pixels
);
457 if (get_tex_memcpy(ctx
, format
, type
, pixels
, texObj
, texImage
)) {
460 else if (format
== GL_COLOR_INDEX
) {
461 get_tex_color_index(ctx
, dimensions
, format
, type
, pixels
, texImage
);
463 else if (format
== GL_DEPTH_COMPONENT
) {
464 get_tex_depth(ctx
, dimensions
, format
, type
, pixels
, texImage
);
466 else if (format
== GL_DEPTH_STENCIL_EXT
) {
467 get_tex_depth_stencil(ctx
, dimensions
, format
, type
, pixels
, texImage
);
469 else if (format
== GL_YCBCR_MESA
) {
470 get_tex_ycbcr(ctx
, dimensions
, format
, type
, pixels
, texImage
);
473 get_tex_rgba(ctx
, dimensions
, format
, type
, pixels
, texImage
);
476 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
477 ctx
->Driver
.UnmapBuffer(ctx
, GL_PIXEL_PACK_BUFFER_EXT
,
478 ctx
->Pack
.BufferObj
);
485 * This is the software fallback for Driver.GetCompressedTexImage().
486 * All error checking will have been done before this routine is called.
489 _mesa_get_compressed_teximage(struct gl_context
*ctx
, GLenum target
, GLint level
,
491 struct gl_texture_object
*texObj
,
492 struct gl_texture_image
*texImage
)
494 const GLuint row_stride
= _mesa_format_row_stride(texImage
->TexFormat
,
496 const GLuint row_stride_stored
= _mesa_format_row_stride(texImage
->TexFormat
,
497 texImage
->RowStride
);
500 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
501 /* pack texture image into a PBO */
502 GLubyte
*buf
= (GLubyte
*)
503 ctx
->Driver
.MapBuffer(ctx
, GL_PIXEL_PACK_BUFFER_EXT
,
504 GL_WRITE_ONLY_ARB
, ctx
->Pack
.BufferObj
);
506 /* out of memory or other unexpected error */
507 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
508 "glGetCompresssedTexImage(map PBO failed)");
511 img
= ADD_POINTERS(buf
, img
);
514 /* no pixelstore or pixel transfer, but respect stride */
516 if (row_stride
== row_stride_stored
) {
517 const GLuint size
= _mesa_format_image_size(texImage
->TexFormat
,
521 memcpy(img
, texImage
->Data
, size
);
525 _mesa_get_format_block_size(texImage
->TexFormat
, &bw
, &bh
);
526 for (i
= 0; i
< (texImage
->Height
+ bh
- 1) / bh
; i
++) {
527 memcpy((GLubyte
*)img
+ i
* row_stride
,
528 (GLubyte
*)texImage
->Data
+ i
* row_stride_stored
,
533 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
534 ctx
->Driver
.UnmapBuffer(ctx
, GL_PIXEL_PACK_BUFFER_EXT
,
535 ctx
->Pack
.BufferObj
);
542 * Do error checking for a glGetTexImage() call.
543 * \return GL_TRUE if any error, GL_FALSE if no errors.
546 getteximage_error_check(struct gl_context
*ctx
, GLenum target
, GLint level
,
547 GLenum format
, GLenum type
, GLsizei clientMemSize
,
550 struct gl_texture_object
*texObj
;
551 struct gl_texture_image
*texImage
;
552 const GLint maxLevels
= _mesa_max_texture_levels(ctx
, target
);
553 const GLuint dimensions
= (target
== GL_TEXTURE_3D
) ? 3 : 2;
556 if (maxLevels
== 0) {
557 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(target=0x%x)", target
);
561 if (level
< 0 || level
>= maxLevels
) {
562 _mesa_error( ctx
, GL_INVALID_VALUE
, "glGetTexImage(level)" );
566 if (_mesa_sizeof_packed_type(type
) <= 0) {
567 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexImage(type)" );
571 if (_mesa_components_in_format(format
) <= 0 ||
572 format
== GL_STENCIL_INDEX
) {
573 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)" );
577 if (!ctx
->Extensions
.EXT_paletted_texture
&& _mesa_is_index_format(format
)) {
578 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
582 if (!ctx
->Extensions
.ARB_depth_texture
&& _mesa_is_depth_format(format
)) {
583 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
587 if (!ctx
->Extensions
.MESA_ycbcr_texture
&& _mesa_is_ycbcr_format(format
)) {
588 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
592 if (!ctx
->Extensions
.EXT_packed_depth_stencil
593 && _mesa_is_depthstencil_format(format
)) {
594 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
598 if (!ctx
->Extensions
.ATI_envmap_bumpmap
599 && _mesa_is_dudv_format(format
)) {
600 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
604 texObj
= _mesa_get_current_tex_object(ctx
, target
);
606 if (!texObj
|| _mesa_is_proxy_texture(target
)) {
607 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(target)");
611 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
617 baseFormat
= _mesa_get_format_base_format(texImage
->TexFormat
);
619 /* Make sure the requested image format is compatible with the
620 * texture's format. Note that a color index texture can be converted
621 * to RGBA so that combo is allowed.
623 if (_mesa_is_color_format(format
)
624 && !_mesa_is_color_format(baseFormat
)
625 && !_mesa_is_index_format(baseFormat
)) {
626 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
629 else if (_mesa_is_index_format(format
)
630 && !_mesa_is_index_format(baseFormat
)) {
631 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
634 else if (_mesa_is_depth_format(format
)
635 && !_mesa_is_depth_format(baseFormat
)
636 && !_mesa_is_depthstencil_format(baseFormat
)) {
637 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
640 else if (_mesa_is_ycbcr_format(format
)
641 && !_mesa_is_ycbcr_format(baseFormat
)) {
642 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
645 else if (_mesa_is_depthstencil_format(format
)
646 && !_mesa_is_depthstencil_format(baseFormat
)) {
647 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
650 else if (_mesa_is_dudv_format(format
)
651 && !_mesa_is_dudv_format(baseFormat
)) {
652 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
656 if (!_mesa_validate_pbo_access(dimensions
, &ctx
->Pack
, texImage
->Width
,
657 texImage
->Height
, texImage
->Depth
,
658 format
, type
, clientMemSize
, pixels
)) {
659 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
660 _mesa_error(ctx
, GL_INVALID_OPERATION
,
661 "glGetTexImage(out of bounds PBO access)");
663 _mesa_error(ctx
, GL_INVALID_OPERATION
,
664 "glGetnTexImageARB(out of bounds access:"
665 " bufSize (%d) is too small)", clientMemSize
);
670 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
671 /* PBO should not be mapped */
672 if (_mesa_bufferobj_mapped(ctx
->Pack
.BufferObj
)) {
673 _mesa_error(ctx
, GL_INVALID_OPERATION
,
674 "glGetTexImage(PBO is mapped)");
685 * Get texture image. Called by glGetTexImage.
687 * \param target texture target.
688 * \param level image level.
689 * \param format pixel data format for returned image.
690 * \param type pixel data type for returned image.
691 * \param bufSize size of the pixels data buffer.
692 * \param pixels returned pixel data.
695 _mesa_GetnTexImageARB( GLenum target
, GLint level
, GLenum format
,
696 GLenum type
, GLsizei bufSize
, GLvoid
*pixels
)
698 struct gl_texture_object
*texObj
;
699 struct gl_texture_image
*texImage
;
700 GET_CURRENT_CONTEXT(ctx
);
701 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
703 if (getteximage_error_check(ctx
, target
, level
, format
, type
,
708 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !pixels
) {
709 /* not an error, do nothing */
713 texObj
= _mesa_get_current_tex_object(ctx
, target
);
714 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
716 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
717 _mesa_debug(ctx
, "glGetTexImage(tex %u) format = %s, w=%d, h=%d,"
718 " dstFmt=0x%x, dstType=0x%x\n",
720 _mesa_get_format_name(texImage
->TexFormat
),
721 texImage
->Width
, texImage
->Height
,
725 _mesa_lock_texture(ctx
, texObj
);
727 ctx
->Driver
.GetTexImage(ctx
, target
, level
, format
, type
, pixels
,
730 _mesa_unlock_texture(ctx
, texObj
);
735 _mesa_GetTexImage( GLenum target
, GLint level
, GLenum format
,
736 GLenum type
, GLvoid
*pixels
)
738 _mesa_GetnTexImageARB(target
, level
, format
, type
, INT_MAX
, pixels
);
743 * Do error checking for a glGetCompressedTexImage() call.
744 * \return GL_TRUE if any error, GL_FALSE if no errors.
747 getcompressedteximage_error_check(struct gl_context
*ctx
, GLenum target
,
748 GLint level
, GLsizei clientMemSize
, GLvoid
*img
)
750 struct gl_texture_object
*texObj
;
751 struct gl_texture_image
*texImage
;
752 const GLint maxLevels
= _mesa_max_texture_levels(ctx
, target
);
753 GLuint compressedSize
;
755 if (maxLevels
== 0) {
756 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetCompressedTexImage(target=0x%x)",
761 if (level
< 0 || level
>= maxLevels
) {
762 _mesa_error(ctx
, GL_INVALID_VALUE
,
763 "glGetCompressedTexImageARB(bad level = %d)", level
);
767 if (_mesa_is_proxy_texture(target
)) {
768 _mesa_error(ctx
, GL_INVALID_ENUM
,
769 "glGetCompressedTexImageARB(bad target = %s)",
770 _mesa_lookup_enum_by_nr(target
));
774 texObj
= _mesa_get_current_tex_object(ctx
, target
);
776 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetCompressedTexImageARB(target)");
780 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
783 /* probably invalid mipmap level */
784 _mesa_error(ctx
, GL_INVALID_VALUE
,
785 "glGetCompressedTexImageARB(level)");
789 if (!_mesa_is_format_compressed(texImage
->TexFormat
)) {
790 _mesa_error(ctx
, GL_INVALID_OPERATION
,
791 "glGetCompressedTexImageARB(texture is not compressed)");
795 compressedSize
= _mesa_format_image_size(texImage
->TexFormat
,
800 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
801 /* do bounds checking on writing to client memory */
802 if (clientMemSize
< compressedSize
) {
803 _mesa_error(ctx
, GL_INVALID_OPERATION
,
804 "glGetnCompressedTexImageARB(out of bounds access:"
805 " bufSize (%d) is too small)", clientMemSize
);
808 /* do bounds checking on PBO write */
809 if ((const GLubyte
*) img
+ compressedSize
>
810 (const GLubyte
*) ctx
->Pack
.BufferObj
->Size
) {
811 _mesa_error(ctx
, GL_INVALID_OPERATION
,
812 "glGetCompressedTexImage(out of bounds PBO access)");
816 /* make sure PBO is not mapped */
817 if (_mesa_bufferobj_mapped(ctx
->Pack
.BufferObj
)) {
818 _mesa_error(ctx
, GL_INVALID_OPERATION
,
819 "glGetCompressedTexImage(PBO is mapped)");
829 _mesa_GetnCompressedTexImageARB(GLenum target
, GLint level
, GLsizei bufSize
,
832 struct gl_texture_object
*texObj
;
833 struct gl_texture_image
*texImage
;
834 GET_CURRENT_CONTEXT(ctx
);
835 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
837 if (getcompressedteximage_error_check(ctx
, target
, level
, bufSize
, img
)) {
841 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !img
) {
842 /* not an error, do nothing */
846 texObj
= _mesa_get_current_tex_object(ctx
, target
);
847 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
849 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
851 "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n",
853 _mesa_get_format_name(texImage
->TexFormat
),
854 texImage
->Width
, texImage
->Height
);
857 _mesa_lock_texture(ctx
, texObj
);
859 ctx
->Driver
.GetCompressedTexImage(ctx
, target
, level
, img
,
862 _mesa_unlock_texture(ctx
, texObj
);
866 _mesa_GetCompressedTexImageARB(GLenum target
, GLint level
, GLvoid
*img
)
868 _mesa_GetnCompressedTexImageARB(target
, level
, INT_MAX
, img
);