2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (c) 2009 VMware, Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
28 * Code for glGetTexImage() and glGetCompressedTexImage().
33 #include "bufferobj.h"
37 #include "format_unpack.h"
38 #include "glformats.h"
43 #include "pixelstore.h"
44 #include "texcompress.h"
45 #include "texgetimage.h"
49 #include "format_utils.h"
50 #include "pixeltransfer.h"
53 * Can the given type represent negative values?
55 static inline GLboolean
56 type_needs_clamping(GLenum type
)
63 case GL_HALF_FLOAT_ARB
:
64 case GL_UNSIGNED_INT_10F_11F_11F_REV
:
65 case GL_UNSIGNED_INT_5_9_9_9_REV
:
74 * glGetTexImage for depth/Z pixels.
77 get_tex_depth(struct gl_context
*ctx
, GLuint dimensions
,
78 GLint xoffset
, GLint yoffset
, GLint zoffset
,
79 GLsizei width
, GLsizei height
, GLint depth
,
80 GLenum format
, GLenum type
, GLvoid
*pixels
,
81 struct gl_texture_image
*texImage
)
84 GLfloat
*depthRow
= malloc(width
* sizeof(GLfloat
));
87 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
91 for (img
= 0; img
< depth
; img
++) {
95 /* map src texture buffer */
96 ctx
->Driver
.MapTextureImage(ctx
, texImage
, zoffset
+ img
,
97 xoffset
, yoffset
, width
, height
,
98 GL_MAP_READ_BIT
, &srcMap
, &srcRowStride
);
101 for (row
= 0; row
< height
; row
++) {
102 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
103 width
, height
, format
, type
,
105 const GLubyte
*src
= srcMap
+ row
* srcRowStride
;
106 _mesa_unpack_float_z_row(texImage
->TexFormat
, width
, src
, depthRow
);
107 _mesa_pack_depth_span(ctx
, width
, dest
, type
, depthRow
, &ctx
->Pack
);
110 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, zoffset
+ img
);
113 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
123 * glGetTexImage for depth/stencil pixels.
126 get_tex_depth_stencil(struct gl_context
*ctx
, GLuint dimensions
,
127 GLint xoffset
, GLint yoffset
, GLint zoffset
,
128 GLsizei width
, GLsizei height
, GLint depth
,
129 GLenum format
, GLenum type
, GLvoid
*pixels
,
130 struct gl_texture_image
*texImage
)
134 assert(format
== GL_DEPTH_STENCIL
);
135 assert(type
== GL_UNSIGNED_INT_24_8
||
136 type
== GL_FLOAT_32_UNSIGNED_INT_24_8_REV
);
138 for (img
= 0; img
< depth
; img
++) {
142 /* map src texture buffer */
143 ctx
->Driver
.MapTextureImage(ctx
, texImage
, zoffset
+ img
,
144 xoffset
, yoffset
, width
, height
,
145 GL_MAP_READ_BIT
, &srcMap
, &rowstride
);
148 for (row
= 0; row
< height
; row
++) {
149 const GLubyte
*src
= srcMap
+ row
* rowstride
;
150 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
151 width
, height
, format
, type
,
153 _mesa_unpack_depth_stencil_row(texImage
->TexFormat
,
155 (const GLuint
*) src
,
157 if (ctx
->Pack
.SwapBytes
) {
158 _mesa_swap4((GLuint
*) dest
, width
);
162 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, zoffset
+ img
);
165 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
172 * glGetTexImage for stencil pixels.
175 get_tex_stencil(struct gl_context
*ctx
, GLuint dimensions
,
176 GLint xoffset
, GLint yoffset
, GLint zoffset
,
177 GLsizei width
, GLsizei height
, GLint depth
,
178 GLenum format
, GLenum type
, GLvoid
*pixels
,
179 struct gl_texture_image
*texImage
)
183 assert(format
== GL_STENCIL_INDEX
);
185 for (img
= 0; img
< depth
; img
++) {
189 /* map src texture buffer */
190 ctx
->Driver
.MapTextureImage(ctx
, texImage
, zoffset
+ img
,
191 xoffset
, yoffset
, width
, height
,
193 &srcMap
, &rowstride
);
196 for (row
= 0; row
< height
; row
++) {
197 const GLubyte
*src
= srcMap
+ row
* rowstride
;
198 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
199 width
, height
, format
, type
,
201 _mesa_unpack_ubyte_stencil_row(texImage
->TexFormat
,
203 (const GLuint
*) src
,
207 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, zoffset
+ img
);
210 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
218 * glGetTexImage for YCbCr pixels.
221 get_tex_ycbcr(struct gl_context
*ctx
, GLuint dimensions
,
222 GLint xoffset
, GLint yoffset
, GLint zoffset
,
223 GLsizei width
, GLsizei height
, GLint depth
,
224 GLenum format
, GLenum type
, GLvoid
*pixels
,
225 struct gl_texture_image
*texImage
)
229 for (img
= 0; img
< depth
; img
++) {
233 /* map src texture buffer */
234 ctx
->Driver
.MapTextureImage(ctx
, texImage
, zoffset
+ img
,
235 xoffset
, yoffset
, width
, height
,
236 GL_MAP_READ_BIT
, &srcMap
, &rowstride
);
239 for (row
= 0; row
< height
; row
++) {
240 const GLubyte
*src
= srcMap
+ row
* rowstride
;
241 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
242 width
, height
, format
, type
,
244 memcpy(dest
, src
, width
* sizeof(GLushort
));
246 /* check for byte swapping */
247 if ((texImage
->TexFormat
== MESA_FORMAT_YCBCR
248 && type
== GL_UNSIGNED_SHORT_8_8_REV_MESA
) ||
249 (texImage
->TexFormat
== MESA_FORMAT_YCBCR_REV
250 && type
== GL_UNSIGNED_SHORT_8_8_MESA
)) {
251 if (!ctx
->Pack
.SwapBytes
)
252 _mesa_swap2((GLushort
*) dest
, width
);
254 else if (ctx
->Pack
.SwapBytes
) {
255 _mesa_swap2((GLushort
*) dest
, width
);
259 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, zoffset
+ img
);
262 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
270 * Get a color texture image with decompression.
273 get_tex_rgba_compressed(struct gl_context
*ctx
, GLuint dimensions
,
274 GLint xoffset
, GLint yoffset
, GLint zoffset
,
275 GLsizei width
, GLsizei height
, GLint depth
,
276 GLenum format
, GLenum type
, GLvoid
*pixels
,
277 struct gl_texture_image
*texImage
,
278 GLbitfield transferOps
)
280 /* don't want to apply sRGB -> RGB conversion here so override the format */
281 const mesa_format texFormat
=
282 _mesa_get_srgb_format_linear(texImage
->TexFormat
);
283 const GLenum baseFormat
= _mesa_get_format_base_format(texFormat
);
284 GLfloat
*tempImage
, *tempSlice
;
286 int srcStride
, dstStride
;
289 uint8_t rebaseSwizzle
[4];
291 /* Decompress into temp float buffer, then pack into user buffer */
292 tempImage
= malloc(width
* height
* depth
* 4 * sizeof(GLfloat
));
294 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage()");
298 /* Decompress the texture image slices - results in 'tempImage' */
299 for (slice
= 0; slice
< depth
; slice
++) {
303 tempSlice
= tempImage
+ slice
* 4 * width
* height
;
305 ctx
->Driver
.MapTextureImage(ctx
, texImage
, zoffset
+ slice
,
306 xoffset
, yoffset
, width
, height
,
308 &srcMap
, &srcRowStride
);
310 _mesa_decompress_image(texFormat
, width
, height
,
311 srcMap
, srcRowStride
, tempSlice
);
313 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, zoffset
+ slice
);
316 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
322 /* Depending on the base format involved we may need to apply a rebase
323 * transform (for example: if we download to a Luminance format we want
326 if (baseFormat
== GL_LUMINANCE
||
327 baseFormat
== GL_INTENSITY
) {
329 rebaseSwizzle
[0] = MESA_FORMAT_SWIZZLE_X
;
330 rebaseSwizzle
[1] = MESA_FORMAT_SWIZZLE_ZERO
;
331 rebaseSwizzle
[2] = MESA_FORMAT_SWIZZLE_ZERO
;
332 rebaseSwizzle
[3] = MESA_FORMAT_SWIZZLE_ONE
;
333 } else if (baseFormat
== GL_LUMINANCE_ALPHA
) {
335 rebaseSwizzle
[0] = MESA_FORMAT_SWIZZLE_X
;
336 rebaseSwizzle
[1] = MESA_FORMAT_SWIZZLE_ZERO
;
337 rebaseSwizzle
[2] = MESA_FORMAT_SWIZZLE_ZERO
;
338 rebaseSwizzle
[3] = MESA_FORMAT_SWIZZLE_W
;
343 srcStride
= 4 * width
* sizeof(GLfloat
);
344 dstStride
= _mesa_image_row_stride(&ctx
->Pack
, width
, format
, type
);
345 dstFormat
= _mesa_format_from_format_and_type(format
, type
);
346 tempSlice
= tempImage
;
347 for (slice
= 0; slice
< depth
; slice
++) {
348 void *dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
349 width
, height
, format
, type
,
351 _mesa_format_convert(dest
, dstFormat
, dstStride
,
352 tempSlice
, RGBA32_FLOAT
, srcStride
,
354 needsRebase
? rebaseSwizzle
: NULL
);
356 /* Handle byte swapping if required */
357 if (ctx
->Pack
.SwapBytes
) {
358 _mesa_swap_bytes_2d_image(format
, type
, &ctx
->Pack
,
359 width
, height
, dest
, dest
);
362 tempSlice
+= 4 * width
* height
;
370 * Return a base GL format given the user-requested format
371 * for glGetTexImage().
374 _mesa_base_pack_format(GLenum format
)
379 case GL_BGRA_INTEGER
:
380 case GL_RGBA_INTEGER
:
388 case GL_GREEN_INTEGER
:
390 case GL_BLUE_INTEGER
:
392 case GL_ALPHA_INTEGER
:
394 case GL_LUMINANCE_INTEGER_EXT
:
396 case GL_LUMINANCE_ALPHA_INTEGER_EXT
:
397 return GL_LUMINANCE_ALPHA
;
405 * Get an uncompressed color texture image.
408 get_tex_rgba_uncompressed(struct gl_context
*ctx
, GLuint dimensions
,
409 GLint xoffset
, GLint yoffset
, GLint zoffset
,
410 GLsizei width
, GLsizei height
, GLint depth
,
411 GLenum format
, GLenum type
, GLvoid
*pixels
,
412 struct gl_texture_image
*texImage
,
413 GLbitfield transferOps
)
415 /* don't want to apply sRGB -> RGB conversion here so override the format */
416 const mesa_format texFormat
=
417 _mesa_get_srgb_format_linear(texImage
->TexFormat
);
419 GLboolean dst_is_integer
;
422 uint8_t rebaseSwizzle
[4];
426 /* Depending on the base format involved we may need to apply a rebase
427 * transform (for example: if we download to a Luminance format we want
430 if (texImage
->_BaseFormat
== GL_LUMINANCE
||
431 texImage
->_BaseFormat
== GL_INTENSITY
) {
433 rebaseSwizzle
[0] = MESA_FORMAT_SWIZZLE_X
;
434 rebaseSwizzle
[1] = MESA_FORMAT_SWIZZLE_ZERO
;
435 rebaseSwizzle
[2] = MESA_FORMAT_SWIZZLE_ZERO
;
436 rebaseSwizzle
[3] = MESA_FORMAT_SWIZZLE_ONE
;
437 } else if (texImage
->_BaseFormat
== GL_LUMINANCE_ALPHA
) {
439 rebaseSwizzle
[0] = MESA_FORMAT_SWIZZLE_X
;
440 rebaseSwizzle
[1] = MESA_FORMAT_SWIZZLE_ZERO
;
441 rebaseSwizzle
[2] = MESA_FORMAT_SWIZZLE_ZERO
;
442 rebaseSwizzle
[3] = MESA_FORMAT_SWIZZLE_W
;
443 } else if (texImage
->_BaseFormat
!=
444 _mesa_get_format_base_format(texFormat
)) {
446 _mesa_compute_rgba2base2rgba_component_mapping(texImage
->_BaseFormat
,
452 /* Describe the dst format */
453 dst_is_integer
= _mesa_is_enum_format_integer(format
);
454 dst_format
= _mesa_format_from_format_and_type(format
, type
);
455 dst_stride
= _mesa_image_row_stride(&ctx
->Pack
, width
, format
, type
);
457 /* Since _mesa_format_convert does not handle transferOps we need to handle
458 * them before we call the function. This requires to convert to RGBA float
459 * first so we can call _mesa_apply_rgba_transfer_ops. If the dst format is
460 * integer then transferOps do not apply.
462 assert(!transferOps
|| (transferOps
&& !dst_is_integer
));
463 (void) dst_is_integer
; /* silence unused var warning */
465 for (img
= 0; img
< depth
; img
++) {
474 /* map src texture buffer */
475 ctx
->Driver
.MapTextureImage(ctx
, texImage
, zoffset
+ img
,
476 xoffset
, yoffset
, width
, height
,
478 &srcMap
, &rowstride
);
480 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
485 dest
= _mesa_image_address(dimensions
, &ctx
->Pack
, pixels
,
486 width
, height
, format
, type
,
490 uint32_t rgba_format
;
492 bool need_convert
= false;
494 /* We will convert to RGBA float */
495 rgba_format
= RGBA32_FLOAT
;
496 rgba_stride
= width
* 4 * sizeof(GLfloat
);
498 /* If we are lucky and the dst format matches the RGBA format we need
499 * to convert to, then we can convert directly into the dst buffer
500 * and avoid the final conversion/copy from the rgba buffer to the dst
503 if (format
== rgba_format
) {
505 } else if (rgba
== NULL
) { /* Allocate the RGBA buffer only once */
507 rgba
= malloc(height
* rgba_stride
);
509 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage()");
510 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, img
);
515 _mesa_format_convert(rgba
, rgba_format
, rgba_stride
,
516 img_src
, texFormat
, rowstride
,
518 needsRebase
? rebaseSwizzle
: NULL
);
520 /* Handle transfer ops now */
521 _mesa_apply_rgba_transfer_ops(ctx
, transferOps
, width
* height
, rgba
);
523 /* If we had to rebase, we have already handled that */
526 /* If we were lucky and our RGBA conversion matches the dst format,
532 /* Otherwise, we need to convert from RGBA to dst next */
534 src_format
= rgba_format
;
535 src_stride
= rgba_stride
;
537 /* No RGBA conversion needed, convert directly to dst */
539 src_format
= texFormat
;
540 src_stride
= rowstride
;
543 /* Do the conversion to destination format */
544 _mesa_format_convert(dest
, dst_format
, dst_stride
,
545 src
, src_format
, src_stride
,
547 needsRebase
? rebaseSwizzle
: NULL
);
550 /* Handle byte swapping if required */
551 if (ctx
->Pack
.SwapBytes
)
552 _mesa_swap_bytes_2d_image(format
, type
, &ctx
->Pack
,
553 width
, height
, dest
, dest
);
555 /* Unmap the src texture buffer */
556 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, zoffset
+ img
);
566 * glGetTexImage for color formats (RGBA, RGB, alpha, LA, etc).
567 * Compressed textures are handled here as well.
570 get_tex_rgba(struct gl_context
*ctx
, GLuint dimensions
,
571 GLint xoffset
, GLint yoffset
, GLint zoffset
,
572 GLsizei width
, GLsizei height
, GLint depth
,
573 GLenum format
, GLenum type
, GLvoid
*pixels
,
574 struct gl_texture_image
*texImage
)
576 const GLenum dataType
= _mesa_get_format_datatype(texImage
->TexFormat
);
577 GLbitfield transferOps
= 0x0;
579 /* In general, clamping does not apply to glGetTexImage, except when
580 * the returned type of the image can't hold negative values.
582 if (type_needs_clamping(type
)) {
583 /* the returned image type can't have negative values */
584 if (dataType
== GL_FLOAT
||
585 dataType
== GL_HALF_FLOAT
||
586 dataType
== GL_SIGNED_NORMALIZED
||
587 format
== GL_LUMINANCE
||
588 format
== GL_LUMINANCE_ALPHA
) {
589 transferOps
|= IMAGE_CLAMP_BIT
;
593 if (_mesa_is_format_compressed(texImage
->TexFormat
)) {
594 get_tex_rgba_compressed(ctx
, dimensions
,
595 xoffset
, yoffset
, zoffset
,
596 width
, height
, depth
,
598 pixels
, texImage
, transferOps
);
601 get_tex_rgba_uncompressed(ctx
, dimensions
,
602 xoffset
, yoffset
, zoffset
,
603 width
, height
, depth
,
605 pixels
, texImage
, transferOps
);
611 * Try to do glGetTexImage() with simple memcpy().
612 * \return GL_TRUE if done, GL_FALSE otherwise
615 get_tex_memcpy(struct gl_context
*ctx
,
616 GLint xoffset
, GLint yoffset
, GLint zoffset
,
617 GLsizei width
, GLsizei height
, GLint depth
,
618 GLenum format
, GLenum type
, GLvoid
*pixels
,
619 struct gl_texture_image
*texImage
)
621 const GLenum target
= texImage
->TexObject
->Target
;
622 GLboolean memCopy
= GL_FALSE
;
623 GLenum texBaseFormat
= _mesa_get_format_base_format(texImage
->TexFormat
);
626 * Check if we can use memcpy to copy from the hardware texture
627 * format to the user's format/type.
628 * Note that GL's pixel transfer ops don't apply to glGetTexImage()
630 if ((target
== GL_TEXTURE_1D
||
631 target
== GL_TEXTURE_2D
||
632 target
== GL_TEXTURE_RECTANGLE
||
633 _mesa_is_cube_face(target
)) &&
634 texBaseFormat
== texImage
->_BaseFormat
) {
635 memCopy
= _mesa_format_matches_format_and_type(texImage
->TexFormat
,
637 ctx
->Pack
.SwapBytes
, NULL
);
641 /* only a single slice is supported at this time */
646 const GLuint bpp
= _mesa_get_format_bytes(texImage
->TexFormat
);
647 const GLint bytesPerRow
= width
* bpp
;
649 _mesa_image_address2d(&ctx
->Pack
, pixels
, width
, height
,
651 const GLint dstRowStride
=
652 _mesa_image_row_stride(&ctx
->Pack
, width
, format
, type
);
656 /* map src texture buffer */
657 ctx
->Driver
.MapTextureImage(ctx
, texImage
, zoffset
,
658 xoffset
, yoffset
, width
, height
,
659 GL_MAP_READ_BIT
, &src
, &srcRowStride
);
662 if (bytesPerRow
== dstRowStride
&& bytesPerRow
== srcRowStride
) {
663 memcpy(dst
, src
, bytesPerRow
* texImage
->Height
);
667 for (row
= 0; row
< height
; row
++) {
668 memcpy(dst
, src
, bytesPerRow
);
674 /* unmap src texture buffer */
675 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, zoffset
);
678 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage");
687 * This is the software fallback for Driver.GetTexSubImage().
688 * All error checking will have been done before this routine is called.
689 * We'll call ctx->Driver.MapTextureImage() to access the data, then
690 * unmap with ctx->Driver.UnmapTextureImage().
693 _mesa_GetTexSubImage_sw(struct gl_context
*ctx
,
694 GLint xoffset
, GLint yoffset
, GLint zoffset
,
695 GLsizei width
, GLsizei height
, GLint depth
,
696 GLenum format
, GLenum type
, GLvoid
*pixels
,
697 struct gl_texture_image
*texImage
)
699 const GLuint dimensions
=
700 _mesa_get_texture_dimensions(texImage
->TexObject
->Target
);
702 /* map dest buffer, if PBO */
703 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
704 /* Packing texture image into a PBO.
705 * Map the (potentially) VRAM-based buffer into our process space so
706 * we can write into it with the code below.
707 * A hardware driver might use a sophisticated blit to move the
708 * texture data to the PBO if the PBO is in VRAM along with the texture.
710 GLubyte
*buf
= (GLubyte
*)
711 ctx
->Driver
.MapBufferRange(ctx
, 0, ctx
->Pack
.BufferObj
->Size
,
712 GL_MAP_WRITE_BIT
, ctx
->Pack
.BufferObj
,
715 /* out of memory or other unexpected error */
716 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetTexImage(map PBO failed)");
719 /* <pixels> was an offset into the PBO.
720 * Now make it a real, client-side pointer inside the mapped region.
722 pixels
= ADD_POINTERS(buf
, pixels
);
725 /* for all array textures, the Z axis selects the layer */
726 if (texImage
->TexObject
->Target
== GL_TEXTURE_1D_ARRAY
) {
731 assert(zoffset
+ depth
<= texImage
->Height
);
733 assert(zoffset
+ depth
<= texImage
->Depth
);
736 if (get_tex_memcpy(ctx
, xoffset
, yoffset
, zoffset
, width
, height
, depth
,
737 format
, type
, pixels
, texImage
)) {
740 else if (format
== GL_DEPTH_COMPONENT
) {
741 get_tex_depth(ctx
, dimensions
, xoffset
, yoffset
, zoffset
,
742 width
, height
, depth
, format
, type
, pixels
, texImage
);
744 else if (format
== GL_DEPTH_STENCIL_EXT
) {
745 get_tex_depth_stencil(ctx
, dimensions
, xoffset
, yoffset
, zoffset
,
746 width
, height
, depth
, format
, type
, pixels
,
749 else if (format
== GL_STENCIL_INDEX
) {
750 get_tex_stencil(ctx
, dimensions
, xoffset
, yoffset
, zoffset
,
751 width
, height
, depth
, format
, type
, pixels
, texImage
);
753 else if (format
== GL_YCBCR_MESA
) {
754 get_tex_ycbcr(ctx
, dimensions
, xoffset
, yoffset
, zoffset
,
755 width
, height
, depth
, format
, type
, pixels
, texImage
);
758 get_tex_rgba(ctx
, dimensions
, xoffset
, yoffset
, zoffset
,
759 width
, height
, depth
, format
, type
, pixels
, texImage
);
762 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
763 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Pack
.BufferObj
, MAP_INTERNAL
);
770 * This is the software fallback for Driver.GetCompressedTexSubImage().
771 * All error checking will have been done before this routine is called.
774 _mesa_GetCompressedTexSubImage_sw(struct gl_context
*ctx
,
775 struct gl_texture_image
*texImage
,
776 GLint xoffset
, GLint yoffset
,
777 GLint zoffset
, GLsizei width
,
778 GLint height
, GLint depth
,
781 const GLuint dimensions
=
782 _mesa_get_texture_dimensions(texImage
->TexObject
->Target
);
783 struct compressed_pixelstore store
;
787 _mesa_compute_compressed_pixelstore(dimensions
, texImage
->TexFormat
,
788 width
, height
, depth
,
791 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
792 /* pack texture image into a PBO */
794 ctx
->Driver
.MapBufferRange(ctx
, 0, ctx
->Pack
.BufferObj
->Size
,
795 GL_MAP_WRITE_BIT
, ctx
->Pack
.BufferObj
,
798 /* out of memory or other unexpected error */
799 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
800 "glGetCompresssedTexImage(map PBO failed)");
803 dest
= ADD_POINTERS(dest
, img
);
808 dest
+= store
.SkipBytes
;
810 for (slice
= 0; slice
< store
.CopySlices
; slice
++) {
814 /* map src texture buffer */
815 ctx
->Driver
.MapTextureImage(ctx
, texImage
, zoffset
+ slice
,
816 xoffset
, yoffset
, width
, height
,
817 GL_MAP_READ_BIT
, &src
, &srcRowStride
);
821 for (i
= 0; i
< store
.CopyRowsPerSlice
; i
++) {
822 memcpy(dest
, src
, store
.CopyBytesPerRow
);
823 dest
+= store
.TotalBytesPerRow
;
827 ctx
->Driver
.UnmapTextureImage(ctx
, texImage
, zoffset
+ slice
);
829 /* Advance to next slice */
830 dest
+= store
.TotalBytesPerRow
* (store
.TotalRowsPerSlice
-
831 store
.CopyRowsPerSlice
);
834 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glGetCompresssedTexImage");
838 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
839 ctx
->Driver
.UnmapBuffer(ctx
, ctx
->Pack
.BufferObj
, MAP_INTERNAL
);
845 * Validate the texture target enum supplied to glGetTex(ture)Image or
846 * glGetCompressedTex(ture)Image.
849 legal_getteximage_target(struct gl_context
*ctx
, GLenum target
, bool dsa
)
856 case GL_TEXTURE_RECTANGLE_NV
:
857 return ctx
->Extensions
.NV_texture_rectangle
;
858 case GL_TEXTURE_1D_ARRAY_EXT
:
859 case GL_TEXTURE_2D_ARRAY_EXT
:
860 return ctx
->Extensions
.EXT_texture_array
;
861 case GL_TEXTURE_CUBE_MAP_ARRAY
:
862 return ctx
->Extensions
.ARB_texture_cube_map_array
;
864 /* Section 8.11 (Texture Queries) of the OpenGL 4.5 core profile spec
866 * "An INVALID_ENUM error is generated if the effective target is not
867 * one of TEXTURE_1D, TEXTURE_2D, TEXTURE_3D, TEXTURE_1D_ARRAY,
868 * TEXTURE_2D_ARRAY, TEXTURE_CUBE_MAP_ARRAY, TEXTURE_RECTANGLE, one of
869 * the targets from table 8.19 (for GetTexImage and GetnTexImage *only*),
870 * or TEXTURE_CUBE_MAP (for GetTextureImage *only*)." (Emphasis added.)
872 case GL_TEXTURE_CUBE_MAP_POSITIVE_X
:
873 case GL_TEXTURE_CUBE_MAP_NEGATIVE_X
:
874 case GL_TEXTURE_CUBE_MAP_POSITIVE_Y
:
875 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y
:
876 case GL_TEXTURE_CUBE_MAP_POSITIVE_Z
:
877 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z
:
878 return dsa
? GL_FALSE
: ctx
->Extensions
.ARB_texture_cube_map
;
879 case GL_TEXTURE_CUBE_MAP
:
880 return dsa
? GL_TRUE
: GL_FALSE
;
888 * Wrapper for _mesa_select_tex_image() which can handle target being
889 * GL_TEXTURE_CUBE_MAP in which case we use zoffset to select a cube face.
890 * This can happen for glGetTextureImage and glGetTextureSubImage (DSA
893 static struct gl_texture_image
*
894 select_tex_image(const struct gl_texture_object
*texObj
, GLenum target
,
895 GLint level
, GLint zoffset
)
898 assert(level
< MAX_TEXTURE_LEVELS
);
899 if (target
== GL_TEXTURE_CUBE_MAP
) {
900 assert(zoffset
>= 0);
902 target
= GL_TEXTURE_CUBE_MAP_POSITIVE_X
+ zoffset
;
904 return _mesa_select_tex_image(texObj
, target
, level
);
909 * Error-check the offset and size arguments to
910 * glGet[Compressed]TextureSubImage(). Also checks if the specified
911 * texture image is missing.
912 * \return true if error, false if no error.
915 dimensions_error_check(struct gl_context
*ctx
,
916 struct gl_texture_object
*texObj
,
917 GLenum target
, GLint level
,
918 GLint xoffset
, GLint yoffset
, GLint zoffset
,
919 GLsizei width
, GLsizei height
, GLsizei depth
,
922 const struct gl_texture_image
*texImage
;
926 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(xoffset = %d)", caller
, xoffset
);
931 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(yoffset = %d)", caller
, yoffset
);
936 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(zoffset = %d)", caller
, zoffset
);
941 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(width = %d)", caller
, width
);
946 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(height = %d)", caller
, height
);
951 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(depth = %d)", caller
, depth
);
955 /* do special per-target checks */
959 _mesa_error(ctx
, GL_INVALID_VALUE
,
960 "%s(1D, yoffset = %d)", caller
, yoffset
);
964 _mesa_error(ctx
, GL_INVALID_VALUE
,
965 "%s(1D, height = %d)", caller
, height
);
969 case GL_TEXTURE_1D_ARRAY
:
971 case GL_TEXTURE_RECTANGLE
:
973 _mesa_error(ctx
, GL_INVALID_VALUE
,
974 "%s(zoffset = %d)", caller
, zoffset
);
978 _mesa_error(ctx
, GL_INVALID_VALUE
,
979 "%s(depth = %d)", caller
, depth
);
983 case GL_TEXTURE_CUBE_MAP
:
984 /* Non-array cube maps are special because we have a gl_texture_image
987 if (zoffset
+ depth
> 6) {
988 _mesa_error(ctx
, GL_INVALID_VALUE
,
989 "%s(zoffset + depth = %d)", caller
, zoffset
+ depth
);
992 /* check that the range of faces exist */
993 for (i
= 0; i
< depth
; i
++) {
994 GLenum face
= GL_TEXTURE_CUBE_MAP_POSITIVE_X
+ zoffset
+ i
;
995 if (!_mesa_select_tex_image(texObj
, face
, level
)) {
996 /* non-existant face */
997 _mesa_error(ctx
, GL_INVALID_OPERATION
,
998 "%s(missing cube face)", caller
);
1007 texImage
= select_tex_image(texObj
, target
, level
, zoffset
);
1009 /* missing texture image */
1010 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(missing image)", caller
);
1014 if (xoffset
+ width
> texImage
->Width
) {
1015 _mesa_error(ctx
, GL_INVALID_VALUE
,
1016 "%s(xoffset %d + width %d > %u)",
1017 caller
, xoffset
, width
, texImage
->Width
);
1021 if (yoffset
+ height
> texImage
->Height
) {
1022 _mesa_error(ctx
, GL_INVALID_VALUE
,
1023 "%s(yoffset %d + height %d > %u)",
1024 caller
, yoffset
, height
, texImage
->Height
);
1028 if (target
!= GL_TEXTURE_CUBE_MAP
) {
1029 /* Cube map error checking was done above */
1030 if (zoffset
+ depth
> texImage
->Depth
) {
1031 _mesa_error(ctx
, GL_INVALID_VALUE
,
1032 "%s(zoffset %d + depth %d > %u)",
1033 caller
, zoffset
, depth
, texImage
->Depth
);
1038 /* Extra checks for compressed textures */
1041 _mesa_get_format_block_size(texImage
->TexFormat
, &bw
, &bh
);
1042 if (bw
> 1 || bh
> 1) {
1043 /* offset must be multiple of block size */
1044 if (xoffset
% bw
!= 0) {
1045 _mesa_error(ctx
, GL_INVALID_VALUE
,
1046 "%s(xoffset = %d)", caller
, xoffset
);
1049 if (target
!= GL_TEXTURE_1D
&& target
!= GL_TEXTURE_1D_ARRAY
) {
1050 if (yoffset
% bh
!= 0) {
1051 _mesa_error(ctx
, GL_INVALID_VALUE
,
1052 "%s(yoffset = %d)", caller
, yoffset
);
1057 /* The size must be a multiple of bw x bh, or we must be using a
1058 * offset+size that exactly hits the edge of the image.
1060 if ((width
% bw
!= 0) &&
1061 (xoffset
+ width
!= (GLint
) texImage
->Width
)) {
1062 _mesa_error(ctx
, GL_INVALID_VALUE
,
1063 "%s(width = %d)", caller
, width
);
1067 if ((height
% bh
!= 0) &&
1068 (yoffset
+ height
!= (GLint
) texImage
->Height
)) {
1069 _mesa_error(ctx
, GL_INVALID_VALUE
,
1070 "%s(height = %d)", caller
, height
);
1076 if (width
== 0 || height
== 0 || depth
== 0) {
1077 /* Not an error, but nothing to do. Return 'true' so that the
1078 * caller simply returns.
1088 * Do PBO-related error checking for getting uncompressed images.
1089 * \return true if there was an error (or the GetTexImage is to be a no-op)
1092 pbo_error_check(struct gl_context
*ctx
, GLenum target
,
1093 GLsizei width
, GLsizei height
, GLsizei depth
,
1094 GLenum format
, GLenum type
, GLsizei clientMemSize
,
1098 const GLuint dimensions
= (target
== GL_TEXTURE_3D
) ? 3 : 2;
1100 if (!_mesa_validate_pbo_access(dimensions
, &ctx
->Pack
, width
, height
, depth
,
1101 format
, type
, clientMemSize
, pixels
)) {
1102 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
1103 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1104 "%s(out of bounds PBO access)", caller
);
1106 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1107 "%s(out of bounds access: bufSize (%d) is too small)",
1108 caller
, clientMemSize
);
1113 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
1114 /* PBO should not be mapped */
1115 if (_mesa_check_disallowed_mapping(ctx
->Pack
.BufferObj
)) {
1116 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1117 "%s(PBO is mapped)", caller
);
1122 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !pixels
) {
1123 /* not an error, do nothing */
1132 * Do error checking for all (non-compressed) get-texture-image functions.
1133 * \return true if any error, false if no errors.
1136 getteximage_error_check(struct gl_context
*ctx
,
1137 struct gl_texture_object
*texObj
,
1138 GLenum target
, GLint level
,
1139 GLint xoffset
, GLint yoffset
, GLint zoffset
,
1140 GLsizei width
, GLsizei height
, GLsizei depth
,
1141 GLenum format
, GLenum type
, GLsizei bufSize
,
1142 GLvoid
*pixels
, const char *caller
)
1144 struct gl_texture_image
*texImage
;
1145 GLenum baseFormat
, err
;
1150 if (texObj
->Target
== 0) {
1151 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(invalid texture)", caller
);
1155 maxLevels
= _mesa_max_texture_levels(ctx
, target
);
1156 if (level
< 0 || level
>= maxLevels
) {
1157 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(level = %d)", caller
, level
);
1161 err
= _mesa_error_check_format_and_type(ctx
, format
, type
);
1162 if (err
!= GL_NO_ERROR
) {
1163 _mesa_error(ctx
, err
, "%s(format/type)", caller
);
1167 if (dimensions_error_check(ctx
, texObj
, target
, level
,
1168 xoffset
, yoffset
, zoffset
,
1169 width
, height
, depth
, caller
)) {
1173 if (pbo_error_check(ctx
, target
, width
, height
, depth
,
1174 format
, type
, bufSize
, pixels
, caller
)) {
1178 texImage
= select_tex_image(texObj
, target
, level
, zoffset
);
1182 * Format and type checking has been moved up to GetnTexImage and
1183 * GetTextureImage so that it happens before getting the texImage object.
1186 baseFormat
= _mesa_get_format_base_format(texImage
->TexFormat
);
1188 /* Make sure the requested image format is compatible with the
1191 if (_mesa_is_color_format(format
)
1192 && !_mesa_is_color_format(baseFormat
)) {
1193 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1194 "%s(format mismatch)", caller
);
1197 else if (_mesa_is_depth_format(format
)
1198 && !_mesa_is_depth_format(baseFormat
)
1199 && !_mesa_is_depthstencil_format(baseFormat
)) {
1200 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1201 "%s(format mismatch)", caller
);
1204 else if (_mesa_is_stencil_format(format
)
1205 && !ctx
->Extensions
.ARB_texture_stencil8
) {
1206 _mesa_error(ctx
, GL_INVALID_ENUM
,
1207 "%s(format=GL_STENCIL_INDEX)", caller
);
1210 else if (_mesa_is_stencil_format(format
)
1211 && !_mesa_is_depthstencil_format(baseFormat
)
1212 && !_mesa_is_stencil_format(baseFormat
)) {
1213 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1214 "%s(format mismatch)", caller
);
1217 else if (_mesa_is_ycbcr_format(format
)
1218 && !_mesa_is_ycbcr_format(baseFormat
)) {
1219 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1220 "%s(format mismatch)", caller
);
1223 else if (_mesa_is_depthstencil_format(format
)
1224 && !_mesa_is_depthstencil_format(baseFormat
)) {
1225 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1226 "%s(format mismatch)", caller
);
1229 else if (!_mesa_is_stencil_format(format
) &&
1230 _mesa_is_enum_format_integer(format
) !=
1231 _mesa_is_format_integer(texImage
->TexFormat
)) {
1232 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1233 "%s(format mismatch)", caller
);
1242 * Return the width, height and depth of a texture image.
1243 * This function must be resilient to bad parameter values since
1244 * this is called before full error checking.
1247 get_texture_image_dims(const struct gl_texture_object
*texObj
,
1248 GLenum target
, GLint level
,
1249 GLsizei
*width
, GLsizei
*height
, GLsizei
*depth
)
1251 const struct gl_texture_image
*texImage
= NULL
;
1253 if (level
>= 0 && level
< MAX_TEXTURE_LEVELS
) {
1254 texImage
= _mesa_select_tex_image(texObj
, target
, level
);
1258 *width
= texImage
->Width
;
1259 *height
= texImage
->Height
;
1260 if (target
== GL_TEXTURE_CUBE_MAP
) {
1264 *depth
= texImage
->Depth
;
1268 *width
= *height
= *depth
= 0;
1274 * Common code for all (uncompressed) get-texture-image functions.
1275 * \param texObj the texture object (should not be null)
1276 * \param target user-provided target, or 0 for DSA
1277 * \param level image level.
1278 * \param format pixel data format for returned image.
1279 * \param type pixel data type for returned image.
1280 * \param bufSize size of the pixels data buffer.
1281 * \param pixels returned pixel data.
1282 * \param caller name of calling function
1285 get_texture_image(struct gl_context
*ctx
,
1286 struct gl_texture_object
*texObj
,
1287 GLenum target
, GLint level
,
1288 GLint xoffset
, GLint yoffset
, GLint zoffset
,
1289 GLsizei width
, GLsizei height
, GLint depth
,
1290 GLenum format
, GLenum type
,
1291 GLvoid
*pixels
, const char *caller
)
1293 struct gl_texture_image
*texImage
;
1294 unsigned firstFace
, numFaces
, i
;
1297 FLUSH_VERTICES(ctx
, 0);
1299 texImage
= select_tex_image(texObj
, target
, level
, zoffset
);
1300 assert(texImage
); /* should have been error checked already */
1302 if (_mesa_is_zero_size_texture(texImage
)) {
1303 /* no image data to return */
1307 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
1308 _mesa_debug(ctx
, "%s(tex %u) format = %s, w=%d, h=%d,"
1309 " dstFmt=0x%x, dstType=0x%x\n",
1310 caller
, texObj
->Name
,
1311 _mesa_get_format_name(texImage
->TexFormat
),
1312 texImage
->Width
, texImage
->Height
,
1316 if (target
== GL_TEXTURE_CUBE_MAP
) {
1317 /* Compute stride between cube faces */
1318 imageStride
= _mesa_image_image_stride(&ctx
->Pack
, width
, height
,
1320 firstFace
= zoffset
;
1327 firstFace
= _mesa_tex_target_to_face(target
);
1331 _mesa_lock_texture(ctx
, texObj
);
1333 for (i
= 0; i
< numFaces
; i
++) {
1334 texImage
= texObj
->Image
[firstFace
+ i
][level
];
1337 ctx
->Driver
.GetTexSubImage(ctx
, xoffset
, yoffset
, zoffset
,
1338 width
, height
, depth
,
1339 format
, type
, pixels
, texImage
);
1341 /* next cube face */
1342 pixels
= (GLubyte
*) pixels
+ imageStride
;
1345 _mesa_unlock_texture(ctx
, texObj
);
1350 _mesa_GetnTexImageARB(GLenum target
, GLint level
, GLenum format
, GLenum type
,
1351 GLsizei bufSize
, GLvoid
*pixels
)
1353 GET_CURRENT_CONTEXT(ctx
);
1354 static const char *caller
= "glGetnTexImageARB";
1355 GLsizei width
, height
, depth
;
1356 struct gl_texture_object
*texObj
;
1358 if (!legal_getteximage_target(ctx
, target
, false)) {
1359 _mesa_error(ctx
, GL_INVALID_ENUM
, "%s", caller
);
1363 texObj
= _mesa_get_current_tex_object(ctx
, target
);
1366 get_texture_image_dims(texObj
, target
, level
, &width
, &height
, &depth
);
1368 if (getteximage_error_check(ctx
, texObj
, target
, level
,
1369 0, 0, 0, width
, height
, depth
,
1370 format
, type
, bufSize
, pixels
, caller
)) {
1374 get_texture_image(ctx
, texObj
, target
, level
,
1375 0, 0, 0, width
, height
, depth
,
1376 format
, type
, pixels
, caller
);
1381 _mesa_GetTexImage(GLenum target
, GLint level
, GLenum format
, GLenum type
,
1384 GET_CURRENT_CONTEXT(ctx
);
1385 static const char *caller
= "glGetTexImage";
1386 GLsizei width
, height
, depth
;
1387 struct gl_texture_object
*texObj
;
1389 if (!legal_getteximage_target(ctx
, target
, false)) {
1390 _mesa_error(ctx
, GL_INVALID_ENUM
, "%s", caller
);
1394 texObj
= _mesa_get_current_tex_object(ctx
, target
);
1397 get_texture_image_dims(texObj
, target
, level
, &width
, &height
, &depth
);
1399 if (getteximage_error_check(ctx
, texObj
, target
, level
,
1400 0, 0, 0, width
, height
, depth
,
1401 format
, type
, INT_MAX
, pixels
, caller
)) {
1405 get_texture_image(ctx
, texObj
, target
, level
,
1406 0, 0, 0, width
, height
, depth
,
1407 format
, type
, pixels
, caller
);
1412 _mesa_GetTextureImage(GLuint texture
, GLint level
, GLenum format
, GLenum type
,
1413 GLsizei bufSize
, GLvoid
*pixels
)
1415 GET_CURRENT_CONTEXT(ctx
);
1416 GLsizei width
, height
, depth
;
1417 static const char *caller
= "glGetTextureImage";
1418 struct gl_texture_object
*texObj
=
1419 _mesa_lookup_texture_err(ctx
, texture
, caller
);
1425 get_texture_image_dims(texObj
, texObj
->Target
, level
,
1426 &width
, &height
, &depth
);
1428 if (getteximage_error_check(ctx
, texObj
, texObj
->Target
, level
,
1429 0, 0, 0, width
, height
, depth
,
1430 format
, type
, bufSize
, pixels
, caller
)) {
1434 get_texture_image(ctx
, texObj
, texObj
->Target
, level
,
1435 0, 0, 0, width
, height
, depth
,
1436 format
, type
, pixels
, caller
);
1441 _mesa_GetTextureSubImage(GLuint texture
, GLint level
,
1442 GLint xoffset
, GLint yoffset
, GLint zoffset
,
1443 GLsizei width
, GLsizei height
, GLsizei depth
,
1444 GLenum format
, GLenum type
, GLsizei bufSize
,
1447 GET_CURRENT_CONTEXT(ctx
);
1448 static const char *caller
= "glGetTextureSubImage";
1449 struct gl_texture_object
*texObj
=
1450 _mesa_lookup_texture_err(ctx
, texture
, caller
);
1456 if (getteximage_error_check(ctx
, texObj
, texObj
->Target
, level
,
1457 xoffset
, yoffset
, zoffset
, width
, height
, depth
,
1458 format
, type
, bufSize
, pixels
, caller
)) {
1462 get_texture_image(ctx
, texObj
, texObj
->Target
, level
,
1463 xoffset
, yoffset
, zoffset
, width
, height
, depth
,
1464 format
, type
, pixels
, caller
);
1470 * Compute the number of bytes which will be written when retrieving
1471 * a sub-region of a compressed texture.
1474 packed_compressed_size(GLuint dimensions
, mesa_format format
,
1475 GLsizei width
, GLsizei height
, GLsizei depth
,
1476 const struct gl_pixelstore_attrib
*packing
)
1478 struct compressed_pixelstore st
;
1481 _mesa_compute_compressed_pixelstore(dimensions
, format
,
1482 width
, height
, depth
,
1485 (st
.CopySlices
- 1) * st
.TotalRowsPerSlice
* st
.TotalBytesPerRow
+
1487 (st
.CopyRowsPerSlice
- 1) * st
.TotalBytesPerRow
+
1495 * Do error checking for getting compressed texture images.
1496 * \return true if any error, false if no errors.
1499 getcompressedteximage_error_check(struct gl_context
*ctx
,
1500 struct gl_texture_object
*texObj
,
1501 GLenum target
, GLint level
,
1502 GLint xoffset
, GLint yoffset
, GLint zoffset
,
1503 GLsizei width
, GLsizei height
, GLsizei depth
,
1504 GLsizei bufSize
, GLvoid
*pixels
,
1507 struct gl_texture_image
*texImage
;
1514 if (texObj
->Target
== 0) {
1515 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(invalid texture)", caller
);
1519 maxLevels
= _mesa_max_texture_levels(ctx
, target
);
1520 if (level
< 0 || level
>= maxLevels
) {
1521 _mesa_error(ctx
, GL_INVALID_VALUE
,
1522 "%s(bad level = %d)", caller
, level
);
1526 if (dimensions_error_check(ctx
, texObj
, target
, level
,
1527 xoffset
, yoffset
, zoffset
,
1528 width
, height
, depth
, caller
)) {
1532 texImage
= select_tex_image(texObj
, target
, level
, zoffset
);
1535 if (!_mesa_is_format_compressed(texImage
->TexFormat
)) {
1536 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1537 "%s(texture is not compressed)", caller
);
1541 /* Check for invalid pixel storage modes */
1542 dimensions
= _mesa_get_texture_dimensions(texObj
->Target
);
1543 if (!_mesa_compressed_pixel_storage_error_check(ctx
, dimensions
,
1549 /* Compute number of bytes that may be touched in the dest buffer */
1550 totalBytes
= packed_compressed_size(dimensions
, texImage
->TexFormat
,
1551 width
, height
, depth
,
1554 /* Do dest buffer bounds checking */
1555 if (_mesa_is_bufferobj(ctx
->Pack
.BufferObj
)) {
1556 /* do bounds checking on PBO write */
1557 if ((GLubyte
*) pixels
+ totalBytes
>
1558 (GLubyte
*) ctx
->Pack
.BufferObj
->Size
) {
1559 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1560 "%s(out of bounds PBO access)", caller
);
1564 /* make sure PBO is not mapped */
1565 if (_mesa_check_disallowed_mapping(ctx
->Pack
.BufferObj
)) {
1566 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(PBO is mapped)", caller
);
1571 /* do bounds checking on writing to client memory */
1572 if (totalBytes
> bufSize
) {
1573 _mesa_error(ctx
, GL_INVALID_OPERATION
,
1574 "%s(out of bounds access: bufSize (%d) is too small)",
1580 if (!_mesa_is_bufferobj(ctx
->Pack
.BufferObj
) && !pixels
) {
1581 /* not an error, but do nothing */
1590 * Common helper for all glGetCompressed-teximage functions.
1593 get_compressed_texture_image(struct gl_context
*ctx
,
1594 struct gl_texture_object
*texObj
,
1595 GLenum target
, GLint level
,
1596 GLint xoffset
, GLint yoffset
, GLint zoffset
,
1597 GLsizei width
, GLsizei height
, GLint depth
,
1601 struct gl_texture_image
*texImage
;
1602 unsigned firstFace
, numFaces
, i
, imageStride
;
1604 FLUSH_VERTICES(ctx
, 0);
1606 texImage
= select_tex_image(texObj
, target
, level
, zoffset
);
1607 assert(texImage
); /* should have been error checked already */
1609 if (_mesa_is_zero_size_texture(texImage
))
1612 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
)) {
1614 "%s(tex %u) format = %s, w=%d, h=%d\n",
1615 caller
, texObj
->Name
,
1616 _mesa_get_format_name(texImage
->TexFormat
),
1617 texImage
->Width
, texImage
->Height
);
1620 if (target
== GL_TEXTURE_CUBE_MAP
) {
1621 struct compressed_pixelstore store
;
1623 /* Compute image stride between cube faces */
1624 _mesa_compute_compressed_pixelstore(2, texImage
->TexFormat
,
1625 width
, height
, depth
,
1626 &ctx
->Pack
, &store
);
1627 imageStride
= store
.TotalBytesPerRow
* store
.TotalRowsPerSlice
;
1629 firstFace
= zoffset
;
1636 firstFace
= _mesa_tex_target_to_face(target
);
1640 _mesa_lock_texture(ctx
, texObj
);
1642 for (i
= 0; i
< numFaces
; i
++) {
1643 texImage
= texObj
->Image
[firstFace
+ i
][level
];
1646 ctx
->Driver
.GetCompressedTexSubImage(ctx
, texImage
,
1647 xoffset
, yoffset
, zoffset
,
1648 width
, height
, depth
, pixels
);
1650 /* next cube face */
1651 pixels
= (GLubyte
*) pixels
+ imageStride
;
1654 _mesa_unlock_texture(ctx
, texObj
);
1659 _mesa_GetnCompressedTexImageARB(GLenum target
, GLint level
, GLsizei bufSize
,
1662 GET_CURRENT_CONTEXT(ctx
);
1663 static const char *caller
= "glGetnCompressedTexImageARB";
1664 GLsizei width
, height
, depth
;
1665 struct gl_texture_object
*texObj
;
1667 if (!legal_getteximage_target(ctx
, target
, false)) {
1668 _mesa_error(ctx
, GL_INVALID_ENUM
, "%s", caller
);
1672 texObj
= _mesa_get_current_tex_object(ctx
, target
);
1675 get_texture_image_dims(texObj
, target
, level
, &width
, &height
, &depth
);
1677 if (getcompressedteximage_error_check(ctx
, texObj
, target
, level
,
1678 0, 0, 0, width
, height
, depth
,
1679 INT_MAX
, pixels
, caller
)) {
1683 get_compressed_texture_image(ctx
, texObj
, target
, level
,
1684 0, 0, 0, width
, height
, depth
,
1690 _mesa_GetCompressedTexImage(GLenum target
, GLint level
, GLvoid
*pixels
)
1692 GET_CURRENT_CONTEXT(ctx
);
1693 static const char *caller
= "glGetCompressedTexImage";
1694 GLsizei width
, height
, depth
;
1695 struct gl_texture_object
*texObj
;
1697 if (!legal_getteximage_target(ctx
, target
, false)) {
1698 _mesa_error(ctx
, GL_INVALID_ENUM
, "%s", caller
);
1702 texObj
= _mesa_get_current_tex_object(ctx
, target
);
1705 get_texture_image_dims(texObj
, target
, level
,
1706 &width
, &height
, &depth
);
1708 if (getcompressedteximage_error_check(ctx
, texObj
, target
, level
,
1709 0, 0, 0, width
, height
, depth
,
1710 INT_MAX
, pixels
, caller
)) {
1714 get_compressed_texture_image(ctx
, texObj
, target
, level
,
1715 0, 0, 0, width
, height
, depth
,
1721 _mesa_GetCompressedTextureImage(GLuint texture
, GLint level
,
1722 GLsizei bufSize
, GLvoid
*pixels
)
1724 GET_CURRENT_CONTEXT(ctx
);
1725 static const char *caller
= "glGetCompressedTextureImage";
1726 GLsizei width
, height
, depth
;
1727 struct gl_texture_object
*texObj
=
1728 _mesa_lookup_texture_err(ctx
, texture
, caller
);
1734 get_texture_image_dims(texObj
, texObj
->Target
, level
,
1735 &width
, &height
, &depth
);
1737 if (getcompressedteximage_error_check(ctx
, texObj
, texObj
->Target
, level
,
1738 0, 0, 0, width
, height
, depth
,
1739 bufSize
, pixels
, caller
)) {
1743 get_compressed_texture_image(ctx
, texObj
, texObj
->Target
, level
,
1744 0, 0, 0, width
, height
, depth
,
1750 _mesa_GetCompressedTextureSubImage(GLuint texture
, GLint level
,
1751 GLint xoffset
, GLint yoffset
,
1752 GLint zoffset
, GLsizei width
,
1753 GLsizei height
, GLsizei depth
,
1754 GLsizei bufSize
, void *pixels
)
1756 GET_CURRENT_CONTEXT(ctx
);
1757 static const char *caller
= "glGetCompressedTextureImage";
1758 struct gl_texture_object
*texObj
;
1760 texObj
= _mesa_lookup_texture_err(ctx
, texture
, caller
);
1765 if (getcompressedteximage_error_check(ctx
, texObj
, texObj
->Target
, level
,
1766 xoffset
, yoffset
, zoffset
,
1767 width
, height
, depth
,
1768 bufSize
, pixels
, caller
)) {
1772 get_compressed_texture_image(ctx
, texObj
, texObj
->Target
, level
,
1773 xoffset
, yoffset
, zoffset
,
1774 width
, height
, depth
,