2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (c) 2009 VMware, Inc.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * Code for glGetTexImage() and glGetCompressedTexImage().
33 #include "bufferobj.h"
37 #include "format_unpack.h"
39 #include "mfeatures.h"
43 #include "texcompress.h"
44 #include "texgetimage.h"
50 * Can the given type represent negative values?
52 static inline GLboolean
53 type_needs_clamping(GLenum type
)
60 case GL_HALF_FLOAT_ARB
:
61 case GL_UNSIGNED_INT_10F_11F_11F_REV
:
62 case GL_UNSIGNED_INT_5_9_9_9_REV
:
71 * glGetTexImage for depth/Z pixels.
74 get_tex_depth(struct gl_context
*ctx
, GLuint dimensions
,
75 GLenum format
, GLenum type
, GLvoid
*pixels
,
76 struct gl_texture_image
*texImage
)
78 const GLint width
= texImage
->Width
;
79 const GLint height
= texImage
->Height
;
80 const GLint depth
= texImage
->Depth
;
82 GLfloat
*depthRow
= (GLfloat
*) malloc(width
* sizeof(GLfloat
));
85 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
89 for (img
= 0; img
< depth
; img
++) {
93 /* map src texture buffer */
94 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
95 0, 0, width
, height
, GL_MAP_READ_BIT
,
96 &srcMap
, &srcRowStride
);
99 for (row
= 0; row
< height
; row
++) {
100 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
101 width
, height
, format
, type
,
103 const GLubyte
*src
= srcMap
+ row
* srcRowStride
;
104 _mesa_unpack_float_z_row(texImage
->TexFormat
, width
, src
, depthRow
);
105 _mesa_pack_depth_span(ctx
, width
, dest
, type
, depthRow
, &ctx
->Pack
);
108 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
111 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
121 * glGetTexImage for depth/stencil pixels.
124 get_tex_depth_stencil(struct gl_context
*ctx
, GLuint dimensions
,
125 GLenum format
, GLenum type
, GLvoid
*pixels
,
126 struct gl_texture_image
*texImage
)
128 const GLint width
= texImage
->Width
;
129 const GLint height
= texImage
->Height
;
130 const GLint depth
= texImage
->Depth
;
133 for (img
= 0; img
< depth
; img
++) {
137 /* map src texture buffer */
138 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
139 0, 0, width
, height
, GL_MAP_READ_BIT
,
140 &srcMap
, &rowstride
);
143 for (row
= 0; row
< height
; row
++) {
144 const GLubyte
*src
= srcMap
+ row
* rowstride
;
145 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
146 width
, height
, format
, type
,
148 /* XXX Z24_S8 vs. S8_Z24??? */
149 memcpy(dest
, src
, width
* sizeof(GLuint
));
150 if (ctx
->Pack
.SwapBytes
) {
151 _mesa_swap4((GLuint
*) dest
, width
);
155 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
158 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
166 * glGetTexImage for YCbCr pixels.
169 get_tex_ycbcr(struct gl_context
*ctx
, GLuint dimensions
,
170 GLenum format
, GLenum type
, GLvoid
*pixels
,
171 struct gl_texture_image
*texImage
)
173 const GLint width
= texImage
->Width
;
174 const GLint height
= texImage
->Height
;
175 const GLint depth
= texImage
->Depth
;
178 for (img
= 0; img
< depth
; img
++) {
182 /* map src texture buffer */
183 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
184 0, 0, width
, height
, GL_MAP_READ_BIT
,
185 &srcMap
, &rowstride
);
188 for (row
= 0; row
< height
; row
++) {
189 const GLubyte
*src
= srcMap
+ row
* rowstride
;
190 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
191 width
, height
, format
, type
,
193 memcpy(dest
, src
, width
* sizeof(GLushort
));
195 /* check for byte swapping */
196 if ((texImage
->TexFormat
== MESA_FORMAT_YCBCR
197 && type
== GL_UNSIGNED_SHORT_8_8_REV_MESA
) ||
198 (texImage
->TexFormat
== MESA_FORMAT_YCBCR_REV
199 && type
== GL_UNSIGNED_SHORT_8_8_MESA
)) {
200 if (!ctx
->Pack
.SwapBytes
)
201 _mesa_swap2((GLushort
*) dest
, width
);
203 else if (ctx
->Pack
.SwapBytes
) {
204 _mesa_swap2((GLushort
*) dest
, width
);
208 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
211 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
219 * Get a color texture image with decompression.
222 get_tex_rgba_compressed(struct gl_context
*ctx
, GLuint dimensions
,
223 GLenum format
, GLenum type
, GLvoid
*pixels
,
224 struct gl_texture_image
*texImage
,
225 GLbitfield transferOps
)
227 /* don't want to apply sRGB -> RGB conversion here so override the format */
228 const gl_format texFormat
=
229 _mesa_get_srgb_format_linear(texImage
->TexFormat
);
230 const GLenum baseFormat
= _mesa_get_format_base_format(texFormat
);
231 const GLuint width
= texImage
->Width
;
232 const GLuint height
= texImage
->Height
;
233 const GLuint depth
= texImage
->Depth
;
234 GLfloat
*tempImage
, *srcRow
;
237 /* Decompress into temp float buffer, then pack into user buffer */
238 tempImage
= (GLfloat
*) malloc(width
* height
* depth
239 * 4 * sizeof(GLfloat
));
241 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage()");
245 /* Decompress the texture image - results in 'tempImage' */
249 GLuint bytes
, bw
, bh
;
251 bytes
= _mesa_get_format_bytes(texFormat
);
252 _mesa_get_format_block_size(texFormat
, &bw
, &bh
);
254 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
257 &srcMap
, &srcRowStride
);
259 /* XXX This line is a bit of a hack to work around the
260 * mismatch of compressed row strides as returned by
261 * MapTextureImage() vs. what the texture decompression code
262 * uses. This will be fixed in the future.
264 srcRowStride
= srcRowStride
* bh
/ bytes
;
266 _mesa_decompress_image(texFormat
, width
, height
,
267 srcMap
, srcRowStride
, tempImage
);
269 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
272 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
276 if (baseFormat
== GL_LUMINANCE
||
277 baseFormat
== GL_LUMINANCE_ALPHA
) {
278 _mesa_rebase_rgba_float(width
* height
, (GLfloat (*)[4]) tempImage
,
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
);
298 * Get an uncompressed color texture image.
301 get_tex_rgba_uncompressed(struct gl_context
*ctx
, GLuint dimensions
,
302 GLenum format
, GLenum type
, GLvoid
*pixels
,
303 struct gl_texture_image
*texImage
,
304 GLbitfield transferOps
)
306 /* don't want to apply sRGB -> RGB conversion here so override the format */
307 const gl_format texFormat
=
308 _mesa_get_srgb_format_linear(texImage
->TexFormat
);
309 const GLuint width
= texImage
->Width
;
310 const GLenum destBaseFormat
= _mesa_base_tex_format(ctx
, format
);
311 GLenum rebaseFormat
= GL_NONE
;
312 GLuint height
= texImage
->Height
;
313 GLuint depth
= texImage
->Depth
;
316 GLuint (*rgba_uint
)[4];
317 GLboolean is_integer
= _mesa_is_format_integer_color(texImage
->TexFormat
);
319 /* Allocate buffer for one row of texels */
320 rgba
= (GLfloat (*)[4]) malloc(4 * width
* sizeof(GLfloat
));
321 rgba_uint
= (GLuint (*)[4]) rgba
;
323 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage()");
327 if (texImage
->TexObject
->Target
== GL_TEXTURE_1D_ARRAY
) {
332 if (texImage
->_BaseFormat
== GL_LUMINANCE
||
333 texImage
->_BaseFormat
== GL_INTENSITY
||
334 texImage
->_BaseFormat
== GL_LUMINANCE_ALPHA
) {
335 /* If a luminance (or intensity) texture is read back as RGB(A), the
336 * returned value should be (L,0,0,1), not (L,L,L,1). Set rebaseFormat
339 rebaseFormat
= texImage
->_BaseFormat
;
341 else if ((texImage
->_BaseFormat
== GL_RGBA
||
342 texImage
->_BaseFormat
== GL_RGB
) &&
343 (destBaseFormat
== GL_LUMINANCE
||
344 destBaseFormat
== GL_LUMINANCE_ALPHA
||
345 destBaseFormat
== GL_LUMINANCE_INTEGER_EXT
||
346 destBaseFormat
== GL_LUMINANCE_ALPHA_INTEGER_EXT
)) {
347 /* If we're reading back an RGB(A) texture as luminance then we need
348 * to return L=tex(R). Note, that's different from glReadPixels which
351 rebaseFormat
= GL_LUMINANCE_ALPHA
; /* this covers GL_LUMINANCE too */
354 for (img
= 0; img
< depth
; img
++) {
358 /* map src texture buffer */
359 ctx
->Driver
.MapTextureImage(ctx
, texImage
, img
,
360 0, 0, width
, height
, GL_MAP_READ_BIT
,
361 &srcMap
, &rowstride
);
363 for (row
= 0; row
< height
; row
++) {
364 const GLubyte
*src
= srcMap
+ row
* rowstride
;
365 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
366 width
, height
, format
, type
,
370 _mesa_unpack_uint_rgba_row(texFormat
, width
, src
, rgba_uint
);
372 _mesa_rebase_rgba_uint(width
, rgba_uint
, rebaseFormat
);
373 _mesa_pack_rgba_span_int(ctx
, width
, rgba_uint
,
376 _mesa_unpack_rgba_row(texFormat
, width
, src
, rgba
);
378 _mesa_rebase_rgba_float(width
, rgba
, rebaseFormat
);
379 _mesa_pack_rgba_span_float(ctx
, width
, (GLfloat (*)[4]) rgba
,
381 &ctx
->Pack
, transferOps
);
385 /* Unmap the src texture buffer */
386 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
389 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
399 * glGetTexImage for color formats (RGBA, RGB, alpha, LA, etc).
400 * Compressed textures are handled here as well.
403 get_tex_rgba(struct gl_context
*ctx
, GLuint dimensions
,
404 GLenum format
, GLenum type
, GLvoid
*pixels
,
405 struct gl_texture_image
*texImage
)
407 const GLenum dataType
= _mesa_get_format_datatype(texImage
->TexFormat
);
408 GLbitfield transferOps
= 0x0;
410 /* In general, clamping does not apply to glGetTexImage, except when
411 * the returned type of the image can't hold negative values.
413 if (type_needs_clamping(type
)) {
414 /* the returned image type can't have negative values */
415 if (dataType
== GL_FLOAT
||
416 dataType
== GL_SIGNED_NORMALIZED
||
417 format
== GL_LUMINANCE
||
418 format
== GL_LUMINANCE_ALPHA
) {
419 transferOps
|= IMAGE_CLAMP_BIT
;
422 /* This applies to RGB, RGBA textures. if the format is either LUMINANCE
423 * or LUMINANCE ALPHA, luminance (L) is computed as L=R+G+B .we need to
424 * clamp the sum to [0,1].
426 else if ((format
== GL_LUMINANCE
||
427 format
== GL_LUMINANCE_ALPHA
) &&
428 dataType
== GL_UNSIGNED_NORMALIZED
) {
429 transferOps
|= IMAGE_CLAMP_BIT
;
432 if (_mesa_is_format_compressed(texImage
->TexFormat
)) {
433 get_tex_rgba_compressed(ctx
, dimensions
, format
, type
,
434 pixels
, texImage
, transferOps
);
437 get_tex_rgba_uncompressed(ctx
, dimensions
, format
, type
,
438 pixels
, texImage
, transferOps
);
444 * Try to do glGetTexImage() with simple memcpy().
445 * \return GL_TRUE if done, GL_FALSE otherwise
448 get_tex_memcpy(struct gl_context
*ctx
, GLenum format
, GLenum type
,
450 struct gl_texture_image
*texImage
)
452 const GLenum target
= texImage
->TexObject
->Target
;
453 GLboolean memCopy
= GL_FALSE
;
456 * Check if the src/dst formats are compatible.
457 * Also note that GL's pixel transfer ops don't apply to glGetTexImage()
458 * so we don't have to worry about those.
459 * XXX more format combinations could be supported here.
461 if (target
== GL_TEXTURE_1D
||
462 target
== GL_TEXTURE_2D
||
463 target
== GL_TEXTURE_RECTANGLE
||
464 _mesa_is_cube_face(target
)) {
465 if ((texImage
->TexFormat
== MESA_FORMAT_ARGB8888
||
466 texImage
->TexFormat
== MESA_FORMAT_SARGB8
) &&
468 (type
== GL_UNSIGNED_BYTE
|| type
== GL_UNSIGNED_INT_8_8_8_8_REV
) &&
469 !ctx
->Pack
.SwapBytes
&&
470 _mesa_little_endian()) {
473 else if ((texImage
->TexFormat
== MESA_FORMAT_AL88
||
474 texImage
->TexFormat
== MESA_FORMAT_SLA8
) &&
475 format
== GL_LUMINANCE_ALPHA
&&
476 type
== GL_UNSIGNED_BYTE
&&
477 !ctx
->Pack
.SwapBytes
&&
478 _mesa_little_endian()) {
481 else if ((texImage
->TexFormat
== MESA_FORMAT_L8
||
482 texImage
->TexFormat
== MESA_FORMAT_SL8
) &&
483 format
== GL_LUMINANCE
&&
484 type
== GL_UNSIGNED_BYTE
) {
487 else if (texImage
->TexFormat
== MESA_FORMAT_L16
&&
488 format
== GL_LUMINANCE
&&
489 type
== GL_UNSIGNED_SHORT
) {
492 else if (texImage
->TexFormat
== MESA_FORMAT_A8
&&
493 format
== GL_ALPHA
&&
494 type
== GL_UNSIGNED_BYTE
) {
497 else if (texImage
->TexFormat
== MESA_FORMAT_A16
&&
498 format
== GL_ALPHA
&&
499 type
== GL_UNSIGNED_SHORT
) {
505 const GLuint bpp
= _mesa_get_format_bytes(texImage
->TexFormat
);
506 const GLuint bytesPerRow
= texImage
->Width
* bpp
;
508 _mesa_image_address2d(&ctx
->Pack
, pixels
, texImage
->Width
,
509 texImage
->Height
, format
, type
, 0, 0);
510 const GLint dstRowStride
=
511 _mesa_image_row_stride(&ctx
->Pack
, texImage
->Width
, format
, type
);
515 /* map src texture buffer */
516 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
517 0, 0, texImage
->Width
, texImage
->Height
,
518 GL_MAP_READ_BIT
, &src
, &srcRowStride
);
521 if (bytesPerRow
== dstRowStride
&& bytesPerRow
== srcRowStride
) {
522 memcpy(dst
, src
, bytesPerRow
* texImage
->Height
);
526 for (row
= 0; row
< texImage
->Height
; row
++) {
527 memcpy(dst
, src
, bytesPerRow
);
533 /* unmap src texture buffer */
534 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
537 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
546 * This is the software fallback for Driver.GetTexImage().
547 * All error checking will have been done before this routine is called.
548 * We'll call ctx->Driver.MapTextureImage() to access the data, then
549 * unmap with ctx->Driver.UnmapTextureImage().
552 _mesa_get_teximage(struct gl_context
*ctx
,
553 GLenum format
, GLenum type
, GLvoid
*pixels
,
554 struct gl_texture_image
*texImage
)
558 switch (texImage
->TexObject
->Target
) {
569 /* map dest buffer, if PBO */
570 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
571 /* Packing texture image into a PBO.
572 * Map the (potentially) VRAM-based buffer into our process space so
573 * we can write into it with the code below.
574 * A hardware driver might use a sophisticated blit to move the
575 * texture data to the PBO if the PBO is in VRAM along with the texture.
577 GLubyte
*buf
= (GLubyte
*)
578 ctx
->Driver
.MapBufferRange(ctx
, 0, ctx
->Pack
.BufferObj
->Size
,
579 GL_MAP_WRITE_BIT
, ctx
->Pack
.BufferObj
);
581 /* out of memory or other unexpected error */
582 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage(map PBO failed)");
585 /* <pixels> was an offset into the PBO.
586 * Now make it a real, client-side pointer inside the mapped region.
588 pixels
= ADD_POINTERS(buf
, pixels
);
591 if (get_tex_memcpy(ctx
, format
, type
, pixels
, texImage
)) {
594 else if (format
== GL_DEPTH_COMPONENT
) {
595 get_tex_depth(ctx
, dimensions
, format
, type
, pixels
, texImage
);
597 else if (format
== GL_DEPTH_STENCIL_EXT
) {
598 get_tex_depth_stencil(ctx
, dimensions
, format
, type
, pixels
, texImage
);
600 else if (format
== GL_YCBCR_MESA
) {
601 get_tex_ycbcr(ctx
, dimensions
, format
, type
, pixels
, texImage
);
604 get_tex_rgba(ctx
, dimensions
, format
, type
, pixels
, texImage
);
607 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
608 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Pack
.BufferObj
);
615 * This is the software fallback for Driver.GetCompressedTexImage().
616 * All error checking will have been done before this routine is called.
619 _mesa_get_compressed_teximage(struct gl_context
*ctx
,
620 struct gl_texture_image
*texImage
,
623 const GLuint row_stride
=
624 _mesa_format_row_stride(texImage
->TexFormat
, texImage
->Width
);
629 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
630 /* pack texture image into a PBO */
631 GLubyte
*buf
= (GLubyte
*)
632 ctx
->Driver
.MapBufferRange(ctx
, 0, ctx
->Pack
.BufferObj
->Size
,
633 GL_MAP_WRITE_BIT
, ctx
->Pack
.BufferObj
);
635 /* out of memory or other unexpected error */
636 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
637 "glGetCompresssedTexImage(map PBO failed)");
640 img
= ADD_POINTERS(buf
, img
);
643 /* map src texture buffer */
644 ctx
->Driver
.MapTextureImage(ctx
, texImage
, 0,
645 0, 0, texImage
->Width
, texImage
->Height
,
646 GL_MAP_READ_BIT
, &src
, &srcRowStride
);
649 /* no pixelstore or pixel transfer, but respect stride */
651 if (row_stride
== srcRowStride
) {
652 const GLuint size
= _mesa_format_image_size(texImage
->TexFormat
,
656 memcpy(img
, src
, size
);
660 _mesa_get_format_block_size(texImage
->TexFormat
, &bw
, &bh
);
661 for (i
= 0; i
< (texImage
->Height
+ bh
- 1) / bh
; i
++) {
662 memcpy((GLubyte
*)img
+ i
* row_stride
,
663 (GLubyte
*)src
+ i
* srcRowStride
,
668 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, 0);
671 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetCompresssedTexImage");
674 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
675 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Pack
.BufferObj
);
682 * Do error checking for a glGetTexImage() call.
683 * \return GL_TRUE if any error, GL_FALSE if no errors.
686 getteximage_error_check(struct gl_context
*ctx
, GLenum target
, GLint level
,
687 GLenum format
, GLenum type
, GLsizei clientMemSize
,
690 struct gl_texture_object
*texObj
;
691 struct gl_texture_image
*texImage
;
692 const GLint maxLevels
= _mesa_max_texture_levels(ctx
, target
);
693 const GLuint dimensions
= (target
== GL_TEXTURE_3D
) ? 3 : 2;
694 GLenum baseFormat
, err
;
696 if (maxLevels
== 0) {
697 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(target=0x%x)", target
);
701 if (level
< 0 || level
>= maxLevels
) {
702 _mesa_error( ctx
, GL_INVALID_VALUE
, "glGetTexImage(level)" );
706 if (_mesa_sizeof_packed_type(type
) <= 0) {
707 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexImage(type)" );
711 if (_mesa_components_in_format(format
) <= 0 ||
712 format
== GL_STENCIL_INDEX
||
713 format
== GL_COLOR_INDEX
) {
714 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)" );
718 if (!ctx
->Extensions
.ARB_depth_texture
&& _mesa_is_depth_format(format
)) {
719 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
723 if (!ctx
->Extensions
.MESA_ycbcr_texture
&& _mesa_is_ycbcr_format(format
)) {
724 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
728 if (!ctx
->Extensions
.EXT_packed_depth_stencil
729 && _mesa_is_depthstencil_format(format
)) {
730 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
734 if (!ctx
->Extensions
.ATI_envmap_bumpmap
735 && _mesa_is_dudv_format(format
)) {
736 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(format)");
740 err
= _mesa_error_check_format_and_type(ctx
, format
, type
);
741 if (err
!= GL_NO_ERROR
) {
742 _mesa_error(ctx
, err
, "glGetTexImage(format/type)");
746 texObj
= _mesa_get_current_tex_object(ctx
, target
);
748 if (!texObj
|| _mesa_is_proxy_texture(target
)) {
749 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexImage(target)");
753 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
755 /* non-existant texture image */
759 baseFormat
= _mesa_get_format_base_format(texImage
->TexFormat
);
761 /* Make sure the requested image format is compatible with the
764 if (_mesa_is_color_format(format
)
765 && !_mesa_is_color_format(baseFormat
)) {
766 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
769 else if (_mesa_is_depth_format(format
)
770 && !_mesa_is_depth_format(baseFormat
)
771 && !_mesa_is_depthstencil_format(baseFormat
)) {
772 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
775 else if (_mesa_is_ycbcr_format(format
)
776 && !_mesa_is_ycbcr_format(baseFormat
)) {
777 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
780 else if (_mesa_is_depthstencil_format(format
)
781 && !_mesa_is_depthstencil_format(baseFormat
)) {
782 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
785 else if (_mesa_is_dudv_format(format
)
786 && !_mesa_is_dudv_format(baseFormat
)) {
787 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexImage(format mismatch)");
791 if (!_mesa_validate_pbo_access(dimensions
, &ctx
->Pack
, texImage
->Width
,
792 texImage
->Height
, texImage
->Depth
,
793 format
, type
, clientMemSize
, pixels
)) {
794 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
795 _mesa_error(ctx
, GL_INVALID_OPERATION
,
796 "glGetTexImage(out of bounds PBO access)");
798 _mesa_error(ctx
, GL_INVALID_OPERATION
,
799 "glGetnTexImageARB(out of bounds access:"
800 " bufSize (%d) is too small)", clientMemSize
);
805 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
806 /* PBO should not be mapped */
807 if (_mesa_bufferobj_mapped(ctx
->Pack
.BufferObj
)) {
808 _mesa_error(ctx
, GL_INVALID_OPERATION
,
809 "glGetTexImage(PBO is mapped)");
820 * Get texture image. Called by glGetTexImage.
822 * \param target texture target.
823 * \param level image level.
824 * \param format pixel data format for returned image.
825 * \param type pixel data type for returned image.
826 * \param bufSize size of the pixels data buffer.
827 * \param pixels returned pixel data.
830 _mesa_GetnTexImageARB( GLenum target
, GLint level
, GLenum format
,
831 GLenum type
, GLsizei bufSize
, GLvoid
*pixels
)
833 struct gl_texture_object
*texObj
;
834 struct gl_texture_image
*texImage
;
835 GET_CURRENT_CONTEXT(ctx
);
836 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
838 if (getteximage_error_check(ctx
, target
, level
, format
, type
,
843 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !pixels
) {
844 /* not an error, do nothing */
848 texObj
= _mesa_get_current_tex_object(ctx
, target
);
849 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
851 if (_mesa_is_zero_size_texture(texImage
))
854 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
855 _mesa_debug(ctx
, "glGetTexImage(tex %u) format = %s, w=%d, h=%d,"
856 " dstFmt=0x%x, dstType=0x%x\n",
858 _mesa_get_format_name(texImage
->TexFormat
),
859 texImage
->Width
, texImage
->Height
,
863 _mesa_lock_texture(ctx
, texObj
);
865 ctx
->Driver
.GetTexImage(ctx
, format
, type
, pixels
, texImage
);
867 _mesa_unlock_texture(ctx
, texObj
);
872 _mesa_GetTexImage( GLenum target
, GLint level
, GLenum format
,
873 GLenum type
, GLvoid
*pixels
)
875 _mesa_GetnTexImageARB(target
, level
, format
, type
, INT_MAX
, pixels
);
880 * Do error checking for a glGetCompressedTexImage() call.
881 * \return GL_TRUE if any error, GL_FALSE if no errors.
884 getcompressedteximage_error_check(struct gl_context
*ctx
, GLenum target
,
885 GLint level
, GLsizei clientMemSize
, GLvoid
*img
)
887 struct gl_texture_object
*texObj
;
888 struct gl_texture_image
*texImage
;
889 const GLint maxLevels
= _mesa_max_texture_levels(ctx
, target
);
890 GLuint compressedSize
;
892 if (maxLevels
== 0) {
893 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetCompressedTexImage(target=0x%x)",
898 if (level
< 0 || level
>= maxLevels
) {
899 _mesa_error(ctx
, GL_INVALID_VALUE
,
900 "glGetCompressedTexImageARB(bad level = %d)", level
);
904 if (_mesa_is_proxy_texture(target
)) {
905 _mesa_error(ctx
, GL_INVALID_ENUM
,
906 "glGetCompressedTexImageARB(bad target = %s)",
907 _mesa_lookup_enum_by_nr(target
));
911 texObj
= _mesa_get_current_tex_object(ctx
, target
);
913 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetCompressedTexImageARB(target)");
917 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
920 /* probably invalid mipmap level */
921 _mesa_error(ctx
, GL_INVALID_VALUE
,
922 "glGetCompressedTexImageARB(level)");
926 if (!_mesa_is_format_compressed(texImage
->TexFormat
)) {
927 _mesa_error(ctx
, GL_INVALID_OPERATION
,
928 "glGetCompressedTexImageARB(texture is not compressed)");
932 compressedSize
= _mesa_format_image_size(texImage
->TexFormat
,
937 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
938 /* do bounds checking on writing to client memory */
939 if (clientMemSize
< compressedSize
) {
940 _mesa_error(ctx
, GL_INVALID_OPERATION
,
941 "glGetnCompressedTexImageARB(out of bounds access:"
942 " bufSize (%d) is too small)", clientMemSize
);
946 /* do bounds checking on PBO write */
947 if ((const GLubyte
*) img
+ compressedSize
>
948 (const GLubyte
*) ctx
->Pack
.BufferObj
->Size
) {
949 _mesa_error(ctx
, GL_INVALID_OPERATION
,
950 "glGetCompressedTexImage(out of bounds PBO access)");
954 /* make sure PBO is not mapped */
955 if (_mesa_bufferobj_mapped(ctx
->Pack
.BufferObj
)) {
956 _mesa_error(ctx
, GL_INVALID_OPERATION
,
957 "glGetCompressedTexImage(PBO is mapped)");
967 _mesa_GetnCompressedTexImageARB(GLenum target
, GLint level
, GLsizei bufSize
,
970 struct gl_texture_object
*texObj
;
971 struct gl_texture_image
*texImage
;
972 GET_CURRENT_CONTEXT(ctx
);
973 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
975 if (getcompressedteximage_error_check(ctx
, target
, level
, bufSize
, img
)) {
979 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !img
) {
980 /* not an error, do nothing */
984 texObj
= _mesa_get_current_tex_object(ctx
, target
);
985 texImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
987 if (_mesa_is_zero_size_texture(texImage
))
990 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
992 "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n",
994 _mesa_get_format_name(texImage
->TexFormat
),
995 texImage
->Width
, texImage
->Height
);
998 _mesa_lock_texture(ctx
, texObj
);
1000 ctx
->Driver
.GetCompressedTexImage(ctx
, texImage
, img
);
1002 _mesa_unlock_texture(ctx
, texObj
);
1006 _mesa_GetCompressedTexImageARB(GLenum target
, GLint level
, GLvoid
*img
)
1008 _mesa_GetnCompressedTexImageARB(target
, level
, INT_MAX
, img
);