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 * glGetTexImage for color formats (RGBA, RGB, alpha, LA, etc).
220 * Compressed textures are handled here as well.
223 get_tex_rgba(struct gl_context
*ctx
, GLuint dimensions
,
224 GLenum format
, GLenum type
, GLvoid
*pixels
,
225 struct gl_texture_image
*texImage
)
227 /* don't want to apply sRGB -> RGB conversion here so override the format */
228 const gl_format texFormat
= _mesa_get_srgb_format_linear(texImage
->TexFormat
);
229 const GLuint width
= texImage
->Width
;
230 const GLuint height
= texImage
->Height
;
231 const GLuint depth
= texImage
->Depth
;
232 const GLenum dataType
= _mesa_get_format_datatype(texFormat
);
233 const GLenum baseFormat
= _mesa_get_format_base_format(texFormat
);
234 /* Normally, no pixel transfer ops are performed during glGetTexImage.
235 * The only possible exception is component clamping to [0,1].
237 GLbitfield transferOps
= 0x0;
239 /* In general, clamping does not apply to glGetTexImage, except when
240 * the returned type of the image can't hold negative values.
242 if (type_needs_clamping(type
)) {
243 /* the returned image type can't have negative values */
244 if (dataType
== GL_FLOAT
||
245 dataType
== GL_SIGNED_NORMALIZED
||
246 format
== GL_LUMINANCE
||
247 format
== GL_LUMINANCE_ALPHA
) {
248 transferOps
|= IMAGE_CLAMP_BIT
;
252 if (_mesa_is_format_compressed(texFormat
)) {
253 /* Decompress into temp buffer, then pack into user buffer */
254 GLfloat
*tempImage
, *srcRow
;
257 tempImage
= (GLfloat
*) malloc(texImage
->Width
* texImage
->Height
*
258 texImage
->Depth
* 4 * sizeof(GLfloat
));
260 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage()");
264 /* Decompress the texture image - results in 'tempImage' */
268 GLuint bytes
, bw
, bh
;
270 bytes
= _mesa_get_format_bytes(texImage
->TexFormat
);
271 _mesa_get_format_block_size(texImage
->TexFormat
, &bw
, &bh
);
273 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
276 &srcMap
, &srcRowStride
);
279 /* XXX This line is a bit of a hack to work around the
280 * mismatch of compressed row strides as returned by
281 * MapTextureImage() vs. what the texture decompression code
282 * uses. This will be fixed in the future.
284 srcRowStride
= srcRowStride
* bh
/ bytes
;
286 _mesa_decompress_image(texFormat
, width
, height
,
287 srcMap
, srcRowStride
, tempImage
);
289 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
292 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
296 if (baseFormat
== GL_LUMINANCE
||
297 baseFormat
== GL_LUMINANCE_ALPHA
) {
298 /* Set green and blue to zero since the pack function here will
302 for (i
= 0; i
< width
* height
; i
++) {
303 tempImage
[i
* 4 + GCOMP
] = tempImage
[i
* 4 + BCOMP
] = 0.0f
;
308 for (row
= 0; row
< height
; row
++) {
309 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
310 width
, height
, format
, type
,
313 _mesa_pack_rgba_span_float(ctx
, width
, (GLfloat (*)[4]) srcRow
,
314 format
, type
, dest
, &ctx
->Pack
, transferOps
);
321 /* No decompression needed */
325 rgba
= (GLfloat (*)[4]) malloc(4 * width
* sizeof(GLfloat
));
327 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage()");
331 for (img
= 0; img
< depth
; img
++) {
335 /* map src texture buffer */
336 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
337 0, 0, width
, height
, GL_MAP_READ_BIT
,
338 &srcMap
, &rowstride
);
341 for (row
= 0; row
< height
; row
++) {
342 const GLubyte
*src
= srcMap
+ row
* rowstride
;
343 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
344 width
, height
, format
, type
,
347 _mesa_unpack_rgba_row(texFormat
, width
, src
, rgba
);
349 if (texImage
->_BaseFormat
== GL_ALPHA
) {
351 for (col
= 0; col
< width
; col
++) {
352 rgba
[col
][RCOMP
] = 0.0F
;
353 rgba
[col
][GCOMP
] = 0.0F
;
354 rgba
[col
][BCOMP
] = 0.0F
;
357 else if (texImage
->_BaseFormat
== GL_LUMINANCE
) {
359 for (col
= 0; col
< width
; col
++) {
360 rgba
[col
][GCOMP
] = 0.0F
;
361 rgba
[col
][BCOMP
] = 0.0F
;
362 rgba
[col
][ACOMP
] = 1.0F
;
365 else if (texImage
->_BaseFormat
== GL_LUMINANCE_ALPHA
) {
367 for (col
= 0; col
< width
; col
++) {
368 rgba
[col
][GCOMP
] = 0.0F
;
369 rgba
[col
][BCOMP
] = 0.0F
;
372 else if (texImage
->_BaseFormat
== GL_INTENSITY
) {
374 for (col
= 0; col
< width
; col
++) {
375 rgba
[col
][GCOMP
] = 0.0F
;
376 rgba
[col
][BCOMP
] = 0.0F
;
377 rgba
[col
][ACOMP
] = 1.0F
;
381 _mesa_pack_rgba_span_float(ctx
, width
, (GLfloat (*)[4]) rgba
,
383 &ctx
->Pack
, transferOps
);
386 /* Unmap the src texture buffer */
387 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
390 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
401 * Try to do glGetTexImage() with simple memcpy().
402 * \return GL_TRUE if done, GL_FALSE otherwise
405 get_tex_memcpy(struct gl_context
*ctx
, GLenum format
, GLenum type
,
407 struct gl_texture_image
*texImage
)
409 const GLenum target
= texImage
->TexObject
->Target
;
410 GLboolean memCopy
= GL_FALSE
;
413 * Check if the src/dst formats are compatible.
414 * Also note that GL's pixel transfer ops don't apply to glGetTexImage()
415 * so we don't have to worry about those.
416 * XXX more format combinations could be supported here.
418 if (target
== GL_TEXTURE_1D
||
419 target
== GL_TEXTURE_2D
||
420 target
== GL_TEXTURE_RECTANGLE
||
421 _mesa_is_cube_face(target
)) {
422 if ((texImage
->TexFormat
== MESA_FORMAT_ARGB8888
||
423 texImage
->TexFormat
== MESA_FORMAT_SARGB8
) &&
425 (type
== GL_UNSIGNED_BYTE
|| type
== GL_UNSIGNED_INT_8_8_8_8_REV
) &&
426 !ctx
->Pack
.SwapBytes
&&
427 _mesa_little_endian()) {
430 else if ((texImage
->TexFormat
== MESA_FORMAT_AL88
||
431 texImage
->TexFormat
== MESA_FORMAT_SLA8
) &&
432 format
== GL_LUMINANCE_ALPHA
&&
433 type
== GL_UNSIGNED_BYTE
&&
434 !ctx
->Pack
.SwapBytes
&&
435 _mesa_little_endian()) {
438 else if ((texImage
->TexFormat
== MESA_FORMAT_L8
||
439 texImage
->TexFormat
== MESA_FORMAT_SL8
) &&
440 format
== GL_LUMINANCE
&&
441 type
== GL_UNSIGNED_BYTE
) {
444 else if (texImage
->TexFormat
== MESA_FORMAT_L16
&&
445 format
== GL_LUMINANCE
&&
446 type
== GL_UNSIGNED_SHORT
) {
449 else if (texImage
->TexFormat
== MESA_FORMAT_A8
&&
450 format
== GL_ALPHA
&&
451 type
== GL_UNSIGNED_BYTE
) {
454 else if (texImage
->TexFormat
== MESA_FORMAT_A16
&&
455 format
== GL_ALPHA
&&
456 type
== GL_UNSIGNED_SHORT
) {
462 const GLuint bpp
= _mesa_get_format_bytes(texImage
->TexFormat
);
463 const GLuint bytesPerRow
= texImage
->Width
* bpp
;
465 _mesa_image_address2d(&ctx
->Pack
, pixels
, texImage
->Width
,
466 texImage
->Height
, format
, type
, 0, 0);
467 const GLint dstRowStride
=
468 _mesa_image_row_stride(&ctx
->Pack
, texImage
->Width
, format
, type
);
472 /* map src texture buffer */
473 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
474 0, 0, texImage
->Width
, texImage
->Height
,
475 GL_MAP_READ_BIT
, &src
, &srcRowStride
);
478 if (bytesPerRow
== dstRowStride
&& bytesPerRow
== srcRowStride
) {
479 memcpy(dst
, src
, bytesPerRow
* texImage
->Height
);
483 for (row
= 0; row
< texImage
->Height
; row
++) {
484 memcpy(dst
, src
, bytesPerRow
);
490 /* unmap src texture buffer */
491 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
494 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
503 * This is the software fallback for Driver.GetTexImage().
504 * All error checking will have been done before this routine is called.
505 * We'll call ctx->Driver.MapTextureImage() to access the data, then
506 * unmap with ctx->Driver.UnmapTextureImage().
509 _mesa_get_teximage(struct gl_context
*ctx
,
510 GLenum format
, GLenum type
, GLvoid
*pixels
,
511 struct gl_texture_image
*texImage
)
515 switch (texImage
->TexObject
->Target
) {
526 /* map dest buffer, if PBO */
527 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
528 /* Packing texture image into a PBO.
529 * Map the (potentially) VRAM-based buffer into our process space so
530 * we can write into it with the code below.
531 * A hardware driver might use a sophisticated blit to move the
532 * texture data to the PBO if the PBO is in VRAM along with the texture.
534 GLubyte
*buf
= (GLubyte
*)
535 ctx
->Driver
.MapBufferRange(ctx
, 0, ctx
->Pack
.BufferObj
->Size
,
536 GL_MAP_WRITE_BIT
, ctx
->Pack
.BufferObj
);
538 /* out of memory or other unexpected error */
539 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage(map PBO failed)");
542 /* <pixels> was an offset into the PBO.
543 * Now make it a real, client-side pointer inside the mapped region.
545 pixels
= ADD_POINTERS(buf
, pixels
);
548 if (get_tex_memcpy(ctx
, format
, type
, pixels
, texImage
)) {
551 else if (format
== GL_DEPTH_COMPONENT
) {
552 get_tex_depth(ctx
, dimensions
, format
, type
, pixels
, texImage
);
554 else if (format
== GL_DEPTH_STENCIL_EXT
) {
555 get_tex_depth_stencil(ctx
, dimensions
, format
, type
, pixels
, texImage
);
557 else if (format
== GL_YCBCR_MESA
) {
558 get_tex_ycbcr(ctx
, dimensions
, format
, type
, pixels
, texImage
);
561 get_tex_rgba(ctx
, dimensions
, format
, type
, pixels
, texImage
);
564 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
565 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Pack
.BufferObj
);
572 * This is the software fallback for Driver.GetCompressedTexImage().
573 * All error checking will have been done before this routine is called.
576 _mesa_get_compressed_teximage(struct gl_context
*ctx
, GLenum target
, GLint level
,
578 struct gl_texture_object
*texObj
,
579 struct gl_texture_image
*texImage
)
581 const GLuint row_stride
=
582 _mesa_format_row_stride(texImage
->TexFormat
, texImage
->Width
);
587 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
588 /* pack texture image into a PBO */
589 GLubyte
*buf
= (GLubyte
*)
590 ctx
->Driver
.MapBufferRange(ctx
, 0, ctx
->Pack
.BufferObj
->Size
,
591 GL_MAP_WRITE_BIT
, ctx
->Pack
.BufferObj
);
593 /* out of memory or other unexpected error */
594 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
595 "glGetCompresssedTexImage(map PBO failed)");
598 img
= ADD_POINTERS(buf
, img
);
601 /* map src texture buffer */
602 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
603 0, 0, texImage
->Width
, texImage
->Height
,
604 GL_MAP_READ_BIT
, &src
, &srcRowStride
);
607 /* no pixelstore or pixel transfer, but respect stride */
609 if (row_stride
== srcRowStride
) {
610 const GLuint size
= _mesa_format_image_size(texImage
->TexFormat
,
614 memcpy(img
, src
, size
);
618 _mesa_get_format_block_size(texImage
->TexFormat
, &bw
, &bh
);
619 for (i
= 0; i
< (texImage
->Height
+ bh
- 1) / bh
; i
++) {
620 memcpy((GLubyte
*)img
+ i
* row_stride
,
621 (GLubyte
*)src
+ i
* srcRowStride
,
626 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
629 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetCompresssedTexImage");
632 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
633 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Pack
.BufferObj
);
640 * Do error checking for a glGetTexImage() call.
641 * \return GL_TRUE if any error, GL_FALSE if no errors.
644 getteximage_error_check(struct gl_context
*ctx
, GLenum target
, GLint level
,
645 GLenum format
, GLenum type
, GLsizei clientMemSize
,
648 struct gl_texture_object
*texObj
;
649 struct gl_texture_image
*texImage
;
650 const GLint maxLevels
= _mesa_max_texture_levels(ctx
, target
);
651 const GLuint dimensions
= (target
== GL_TEXTURE_3D
) ? 3 : 2;
654 if (maxLevels
== 0) {
655 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(target=0x%x)", target
);
659 if (level
< 0 || level
>= maxLevels
) {
660 _mesa_error( ctx
, GL_INVALID_VALUE
, "glGetTexImage(level)" );
664 if (_mesa_sizeof_packed_type(type
) <= 0) {
665 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexImage(type)" );
669 if (_mesa_components_in_format(format
) <= 0 ||
670 format
== GL_STENCIL_INDEX
||
671 format
== GL_COLOR_INDEX
) {
672 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)" );
676 if (!ctx
->Extensions
.ARB_depth_texture
&& _mesa_is_depth_format(format
)) {
677 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
681 if (!ctx
->Extensions
.MESA_ycbcr_texture
&& _mesa_is_ycbcr_format(format
)) {
682 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
686 if (!ctx
->Extensions
.EXT_packed_depth_stencil
687 && _mesa_is_depthstencil_format(format
)) {
688 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
692 if (!ctx
->Extensions
.ATI_envmap_bumpmap
693 && _mesa_is_dudv_format(format
)) {
694 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
698 texObj
= _mesa_get_current_tex_object(ctx
, target
);
700 if (!texObj
|| _mesa_is_proxy_texture(target
)) {
701 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(target)");
705 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
711 if (!_mesa_is_legal_format_and_type(ctx
, format
, type
)) {
712 /*GL_INVALID_OPERATION is generated by a format/type
713 * mismatch (see the 1.2 spec page 94, sec 3.6.4.)
715 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(target)");
719 baseFormat
= _mesa_get_format_base_format(texImage
->TexFormat
);
721 /* Make sure the requested image format is compatible with the
724 if (_mesa_is_color_format(format
)
725 && !_mesa_is_color_format(baseFormat
)) {
726 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
729 else if (_mesa_is_depth_format(format
)
730 && !_mesa_is_depth_format(baseFormat
)
731 && !_mesa_is_depthstencil_format(baseFormat
)) {
732 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
735 else if (_mesa_is_ycbcr_format(format
)
736 && !_mesa_is_ycbcr_format(baseFormat
)) {
737 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
740 else if (_mesa_is_depthstencil_format(format
)
741 && !_mesa_is_depthstencil_format(baseFormat
)) {
742 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
745 else if (_mesa_is_dudv_format(format
)
746 && !_mesa_is_dudv_format(baseFormat
)) {
747 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
751 if (!_mesa_validate_pbo_access(dimensions
, &ctx
->Pack
, texImage
->Width
,
752 texImage
->Height
, texImage
->Depth
,
753 format
, type
, clientMemSize
, pixels
)) {
754 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
755 _mesa_error(ctx
, GL_INVALID_OPERATION
,
756 "glGetTexImage(out of bounds PBO access)");
758 _mesa_error(ctx
, GL_INVALID_OPERATION
,
759 "glGetnTexImageARB(out of bounds access:"
760 " bufSize (%d) is too small)", clientMemSize
);
765 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
766 /* PBO should not be mapped */
767 if (_mesa_bufferobj_mapped(ctx
->Pack
.BufferObj
)) {
768 _mesa_error(ctx
, GL_INVALID_OPERATION
,
769 "glGetTexImage(PBO is mapped)");
780 * Get texture image. Called by glGetTexImage.
782 * \param target texture target.
783 * \param level image level.
784 * \param format pixel data format for returned image.
785 * \param type pixel data type for returned image.
786 * \param bufSize size of the pixels data buffer.
787 * \param pixels returned pixel data.
790 _mesa_GetnTexImageARB( GLenum target
, GLint level
, GLenum format
,
791 GLenum type
, GLsizei bufSize
, GLvoid
*pixels
)
793 struct gl_texture_object
*texObj
;
794 struct gl_texture_image
*texImage
;
795 GET_CURRENT_CONTEXT(ctx
);
796 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
798 if (getteximage_error_check(ctx
, target
, level
, format
, type
,
803 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !pixels
) {
804 /* not an error, do nothing */
808 texObj
= _mesa_get_current_tex_object(ctx
, target
);
809 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
811 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
812 _mesa_debug(ctx
, "glGetTexImage(tex %u) format = %s, w=%d, h=%d,"
813 " dstFmt=0x%x, dstType=0x%x\n",
815 _mesa_get_format_name(texImage
->TexFormat
),
816 texImage
->Width
, texImage
->Height
,
820 _mesa_lock_texture(ctx
, texObj
);
822 ctx
->Driver
.GetTexImage(ctx
, format
, type
, pixels
, texImage
);
824 _mesa_unlock_texture(ctx
, texObj
);
829 _mesa_GetTexImage( GLenum target
, GLint level
, GLenum format
,
830 GLenum type
, GLvoid
*pixels
)
832 _mesa_GetnTexImageARB(target
, level
, format
, type
, INT_MAX
, pixels
);
837 * Do error checking for a glGetCompressedTexImage() call.
838 * \return GL_TRUE if any error, GL_FALSE if no errors.
841 getcompressedteximage_error_check(struct gl_context
*ctx
, GLenum target
,
842 GLint level
, GLsizei clientMemSize
, GLvoid
*img
)
844 struct gl_texture_object
*texObj
;
845 struct gl_texture_image
*texImage
;
846 const GLint maxLevels
= _mesa_max_texture_levels(ctx
, target
);
847 GLuint compressedSize
;
849 if (maxLevels
== 0) {
850 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetCompressedTexImage(target=0x%x)",
855 if (level
< 0 || level
>= maxLevels
) {
856 _mesa_error(ctx
, GL_INVALID_VALUE
,
857 "glGetCompressedTexImageARB(bad level = %d)", level
);
861 if (_mesa_is_proxy_texture(target
)) {
862 _mesa_error(ctx
, GL_INVALID_ENUM
,
863 "glGetCompressedTexImageARB(bad target = %s)",
864 _mesa_lookup_enum_by_nr(target
));
868 texObj
= _mesa_get_current_tex_object(ctx
, target
);
870 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetCompressedTexImageARB(target)");
874 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
877 /* probably invalid mipmap level */
878 _mesa_error(ctx
, GL_INVALID_VALUE
,
879 "glGetCompressedTexImageARB(level)");
883 if (!_mesa_is_format_compressed(texImage
->TexFormat
)) {
884 _mesa_error(ctx
, GL_INVALID_OPERATION
,
885 "glGetCompressedTexImageARB(texture is not compressed)");
889 compressedSize
= _mesa_format_image_size(texImage
->TexFormat
,
894 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
895 /* do bounds checking on writing to client memory */
896 if (clientMemSize
< compressedSize
) {
897 _mesa_error(ctx
, GL_INVALID_OPERATION
,
898 "glGetnCompressedTexImageARB(out of bounds access:"
899 " bufSize (%d) is too small)", clientMemSize
);
903 /* do bounds checking on PBO write */
904 if ((const GLubyte
*) img
+ compressedSize
>
905 (const GLubyte
*) ctx
->Pack
.BufferObj
->Size
) {
906 _mesa_error(ctx
, GL_INVALID_OPERATION
,
907 "glGetCompressedTexImage(out of bounds PBO access)");
911 /* make sure PBO is not mapped */
912 if (_mesa_bufferobj_mapped(ctx
->Pack
.BufferObj
)) {
913 _mesa_error(ctx
, GL_INVALID_OPERATION
,
914 "glGetCompressedTexImage(PBO is mapped)");
924 _mesa_GetnCompressedTexImageARB(GLenum target
, GLint level
, GLsizei bufSize
,
927 struct gl_texture_object
*texObj
;
928 struct gl_texture_image
*texImage
;
929 GET_CURRENT_CONTEXT(ctx
);
930 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
932 if (getcompressedteximage_error_check(ctx
, target
, level
, bufSize
, img
)) {
936 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !img
) {
937 /* not an error, do nothing */
941 texObj
= _mesa_get_current_tex_object(ctx
, target
);
942 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
944 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
946 "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n",
948 _mesa_get_format_name(texImage
->TexFormat
),
949 texImage
->Width
, texImage
->Height
);
952 _mesa_lock_texture(ctx
, texObj
);
954 ctx
->Driver
.GetCompressedTexImage(ctx
, target
, level
, img
,
957 _mesa_unlock_texture(ctx
, texObj
);
961 _mesa_GetCompressedTexImageARB(GLenum target
, GLint level
, GLvoid
*img
)
963 _mesa_GetnCompressedTexImageARB(target
, level
, INT_MAX
, img
);