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) {
507 if (rgba == NULL) { /* Allocate the RGBA buffer only once */
508 rgba = malloc(height * rgba_stride);
510 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()");
511 ctx->Driver.UnmapTextureImage(ctx, texImage, img);
517 _mesa_format_convert(rgba, rgba_format, rgba_stride,
518 img_src, texFormat, rowstride,
520 needsRebase ? rebaseSwizzle : NULL);
522 /* Handle transfer ops now */
523 _mesa_apply_rgba_transfer_ops(ctx, transferOps, width * height, rgba);
525 /* If we had to rebase, we have already handled that */
528 /* If we were lucky and our RGBA conversion matches the dst format,
534 /* Otherwise, we need to convert from RGBA to dst next */
536 src_format = rgba_format;
537 src_stride = rgba_stride;
539 /* No RGBA conversion needed, convert directly to dst */
541 src_format = texFormat;
542 src_stride = rowstride;
545 /* Do the conversion to destination format */
546 _mesa_format_convert(dest, dst_format, dst_stride,
547 src, src_format, src_stride,
549 needsRebase ? rebaseSwizzle : NULL);
552 /* Handle byte swapping if required */
553 if (ctx->Pack.SwapBytes)
554 _mesa_swap_bytes_2d_image(format, type, &ctx->Pack,
555 width, height, dest, dest);
557 /* Unmap the src texture buffer */
558 ctx->Driver.UnmapTextureImage(ctx, texImage, zoffset + img);
567 * glGetTexImage for color formats (RGBA, RGB, alpha, LA, etc).
568 * Compressed textures are handled here as well.
571 get_tex_rgba(struct gl_context *ctx, GLuint dimensions,
572 GLint xoffset, GLint yoffset, GLint zoffset,
573 GLsizei width, GLsizei height, GLint depth,
574 GLenum format, GLenum type, GLvoid *pixels,
575 struct gl_texture_image *texImage)
577 const GLenum dataType = _mesa_get_format_datatype(texImage->TexFormat);
578 GLbitfield transferOps = 0x0;
580 /* In general, clamping does not apply to glGetTexImage, except when
581 * the returned type of the image can't hold negative values.
583 if (type_needs_clamping(type)) {
584 /* the returned image type can't have negative values */
585 if (dataType == GL_FLOAT ||
586 dataType == GL_HALF_FLOAT ||
587 dataType == GL_SIGNED_NORMALIZED ||
588 format == GL_LUMINANCE ||
589 format == GL_LUMINANCE_ALPHA) {
590 transferOps |= IMAGE_CLAMP_BIT;
594 if (_mesa_is_format_compressed(texImage->TexFormat)) {
595 get_tex_rgba_compressed(ctx, dimensions,
596 xoffset, yoffset, zoffset,
597 width, height, depth,
599 pixels, texImage, transferOps);
602 get_tex_rgba_uncompressed(ctx, dimensions,
603 xoffset, yoffset, zoffset,
604 width, height, depth,
606 pixels, texImage, transferOps);
612 * Try to do glGetTexImage() with simple memcpy().
613 * \return GL_TRUE if done, GL_FALSE otherwise
616 get_tex_memcpy(struct gl_context *ctx,
617 GLint xoffset, GLint yoffset, GLint zoffset,
618 GLsizei width, GLsizei height, GLint depth,
619 GLenum format, GLenum type, GLvoid *pixels,
620 struct gl_texture_image *texImage)
622 const GLenum target = texImage->TexObject->Target;
623 GLboolean memCopy = GL_FALSE;
624 GLenum texBaseFormat = _mesa_get_format_base_format(texImage->TexFormat);
627 * Check if we can use memcpy to copy from the hardware texture
628 * format to the user's format/type.
629 * Note that GL's pixel transfer ops don't apply to glGetTexImage()
631 if ((target == GL_TEXTURE_1D ||
632 target == GL_TEXTURE_2D ||
633 target == GL_TEXTURE_RECTANGLE ||
634 _mesa_is_cube_face(target)) &&
635 texBaseFormat == texImage->_BaseFormat) {
636 memCopy = _mesa_format_matches_format_and_type(texImage->TexFormat,
638 ctx->Pack.SwapBytes, NULL);
642 /* only a single slice is supported at this time */
647 const GLuint bpp = _mesa_get_format_bytes(texImage->TexFormat);
648 const GLint bytesPerRow = width * bpp;
650 _mesa_image_address2d(&ctx->Pack, pixels, width, height,
652 const GLint dstRowStride =
653 _mesa_image_row_stride(&ctx->Pack, width, format, type);
657 /* map src texture buffer */
658 ctx->Driver.MapTextureImage(ctx, texImage, zoffset,
659 xoffset, yoffset, width, height,
660 GL_MAP_READ_BIT, &src, &srcRowStride);
663 if (bytesPerRow == dstRowStride && bytesPerRow == srcRowStride) {
664 memcpy(dst, src, bytesPerRow * texImage->Height);
668 for (row = 0; row < height; row++) {
669 memcpy(dst, src, bytesPerRow);
675 /* unmap src texture buffer */
676 ctx->Driver.UnmapTextureImage(ctx, texImage, zoffset);
679 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
688 * This is the software fallback for Driver.GetTexSubImage().
689 * All error checking will have been done before this routine is called.
690 * We'll call ctx->Driver.MapTextureImage() to access the data, then
691 * unmap with ctx->Driver.UnmapTextureImage().
694 _mesa_GetTexSubImage_sw(struct gl_context *ctx,
695 GLint xoffset, GLint yoffset, GLint zoffset,
696 GLsizei width, GLsizei height, GLint depth,
697 GLenum format, GLenum type, GLvoid *pixels,
698 struct gl_texture_image *texImage)
700 const GLuint dimensions =
701 _mesa_get_texture_dimensions(texImage->TexObject->Target);
703 /* map dest buffer, if PBO */
704 if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
705 /* Packing texture image into a PBO.
706 * Map the (potentially) VRAM-based buffer into our process space so
707 * we can write into it with the code below.
708 * A hardware driver might use a sophisticated blit to move the
709 * texture data to the PBO if the PBO is in VRAM along with the texture.
711 GLubyte *buf = (GLubyte *)
712 ctx->Driver.MapBufferRange(ctx, 0, ctx->Pack.BufferObj->Size,
713 GL_MAP_WRITE_BIT, ctx->Pack.BufferObj,
716 /* out of memory or other unexpected error */
717 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage(map PBO failed)");
720 /* <pixels> was an offset into the PBO.
721 * Now make it a real, client-side pointer inside the mapped region.
723 pixels = ADD_POINTERS(buf, pixels);
726 /* for all array textures, the Z axis selects the layer */
727 if (texImage->TexObject->Target == GL_TEXTURE_1D_ARRAY) {
732 assert(zoffset + depth <= texImage->Height);
734 assert(zoffset + depth <= texImage->Depth);
737 if (get_tex_memcpy(ctx, xoffset, yoffset, zoffset, width, height, depth,
738 format, type, pixels, texImage)) {
741 else if (format == GL_DEPTH_COMPONENT) {
742 get_tex_depth(ctx, dimensions, xoffset, yoffset, zoffset,
743 width, height, depth, format, type, pixels, texImage);
745 else if (format == GL_DEPTH_STENCIL_EXT) {
746 get_tex_depth_stencil(ctx, dimensions, xoffset, yoffset, zoffset,
747 width, height, depth, format, type, pixels,
750 else if (format == GL_STENCIL_INDEX) {
751 get_tex_stencil(ctx, dimensions, xoffset, yoffset, zoffset,
752 width, height, depth, format, type, pixels, texImage);
754 else if (format == GL_YCBCR_MESA) {
755 get_tex_ycbcr(ctx, dimensions, xoffset, yoffset, zoffset,
756 width, height, depth, format, type, pixels, texImage);
759 get_tex_rgba(ctx, dimensions, xoffset, yoffset, zoffset,
760 width, height, depth, format, type, pixels, texImage);
763 if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
764 ctx->Driver.UnmapBuffer(ctx, ctx->Pack.BufferObj, MAP_INTERNAL);
771 * This is the software fallback for Driver.GetCompressedTexSubImage().
772 * All error checking will have been done before this routine is called.
775 _mesa_GetCompressedTexSubImage_sw(struct gl_context *ctx,
776 struct gl_texture_image *texImage,
777 GLint xoffset, GLint yoffset,
778 GLint zoffset, GLsizei width,
779 GLint height, GLint depth,
782 const GLuint dimensions =
783 _mesa_get_texture_dimensions(texImage->TexObject->Target);
784 struct compressed_pixelstore store;
788 _mesa_compute_compressed_pixelstore(dimensions, texImage->TexFormat,
789 width, height, depth,
792 if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
793 /* pack texture image into a PBO */
795 ctx->Driver.MapBufferRange(ctx, 0, ctx->Pack.BufferObj->Size,
796 GL_MAP_WRITE_BIT, ctx->Pack.BufferObj,
799 /* out of memory or other unexpected error */
800 _mesa_error(ctx, GL_OUT_OF_MEMORY,
801 "glGetCompresssedTexImage(map PBO failed)");
804 dest = ADD_POINTERS(dest, img);
809 dest += store.SkipBytes;
811 for (slice = 0; slice < store.CopySlices; slice++) {
815 /* map src texture buffer */
816 ctx->Driver.MapTextureImage(ctx, texImage, zoffset + slice,
817 xoffset, yoffset, width, height,
818 GL_MAP_READ_BIT, &src, &srcRowStride);
822 for (i = 0; i < store.CopyRowsPerSlice; i++) {
823 memcpy(dest, src, store.CopyBytesPerRow);
824 dest += store.TotalBytesPerRow;
828 ctx->Driver.UnmapTextureImage(ctx, texImage, zoffset + slice);
830 /* Advance to next slice */
831 dest += store.TotalBytesPerRow * (store.TotalRowsPerSlice -
832 store.CopyRowsPerSlice);
835 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetCompresssedTexImage");
839 if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
840 ctx->Driver.UnmapBuffer(ctx, ctx->Pack.BufferObj, MAP_INTERNAL);
846 * Validate the texture target enum supplied to glGetTex(ture)Image or
847 * glGetCompressedTex(ture)Image.
850 legal_getteximage_target(struct gl_context *ctx, GLenum target, bool dsa)
857 case GL_TEXTURE_RECTANGLE_NV:
858 return ctx->Extensions.NV_texture_rectangle;
859 case GL_TEXTURE_1D_ARRAY_EXT:
860 case GL_TEXTURE_2D_ARRAY_EXT:
861 return ctx->Extensions.EXT_texture_array;
862 case GL_TEXTURE_CUBE_MAP_ARRAY:
863 return ctx->Extensions.ARB_texture_cube_map_array;
865 /* Section 8.11 (Texture Queries) of the OpenGL 4.5 core profile spec
867 * "An INVALID_ENUM error is generated if the effective target is not
868 * one of TEXTURE_1D, TEXTURE_2D, TEXTURE_3D, TEXTURE_1D_ARRAY,
869 * TEXTURE_2D_ARRAY, TEXTURE_CUBE_MAP_ARRAY, TEXTURE_RECTANGLE, one of
870 * the targets from table 8.19 (for GetTexImage and GetnTexImage *only*),
871 * or TEXTURE_CUBE_MAP (for GetTextureImage *only*)." (Emphasis added.)
873 case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
874 case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
875 case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
876 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
877 case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
878 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
879 return dsa ? GL_FALSE : ctx->Extensions.ARB_texture_cube_map;
880 case GL_TEXTURE_CUBE_MAP:
881 return dsa ? GL_TRUE : GL_FALSE;
889 * Wrapper for _mesa_select_tex_image() which can handle target being
890 * GL_TEXTURE_CUBE_MAP in which case we use zoffset to select a cube face.
891 * This can happen for glGetTextureImage and glGetTextureSubImage (DSA
894 static struct gl_texture_image *
895 select_tex_image(const struct gl_texture_object *texObj, GLenum target,
896 GLint level, GLint zoffset)
899 assert(level < MAX_TEXTURE_LEVELS);
900 if (target == GL_TEXTURE_CUBE_MAP) {
901 assert(zoffset >= 0);
903 target = GL_TEXTURE_CUBE_MAP_POSITIVE_X + zoffset;
905 return _mesa_select_tex_image(texObj, target, level);
910 * Error-check the offset and size arguments to
911 * glGet[Compressed]TextureSubImage(). Also checks if the specified
912 * texture image is missing.
913 * \return true if error, false if no error.
916 dimensions_error_check(struct gl_context *ctx,
917 struct gl_texture_object *texObj,
918 GLenum target, GLint level,
919 GLint xoffset, GLint yoffset, GLint zoffset,
920 GLsizei width, GLsizei height, GLsizei depth,
923 const struct gl_texture_image *texImage;
927 _mesa_error(ctx, GL_INVALID_VALUE, "%s(xoffset = %d)", caller, xoffset);
932 _mesa_error(ctx, GL_INVALID_VALUE, "%s(yoffset = %d)", caller, yoffset);
937 _mesa_error(ctx, GL_INVALID_VALUE, "%s(zoffset = %d)", caller, zoffset);
942 _mesa_error(ctx, GL_INVALID_VALUE, "%s(width = %d)", caller, width);
947 _mesa_error(ctx, GL_INVALID_VALUE, "%s(height = %d)", caller, height);
952 _mesa_error(ctx, GL_INVALID_VALUE, "%s(depth = %d)", caller, depth);
956 /* do special per-target checks */
960 _mesa_error(ctx, GL_INVALID_VALUE,
961 "%s(1D, yoffset = %d)", caller, yoffset);
965 _mesa_error(ctx, GL_INVALID_VALUE,
966 "%s(1D, height = %d)", caller, height);
970 case GL_TEXTURE_1D_ARRAY:
972 case GL_TEXTURE_RECTANGLE:
974 _mesa_error(ctx, GL_INVALID_VALUE,
975 "%s(zoffset = %d)", caller, zoffset);
979 _mesa_error(ctx, GL_INVALID_VALUE,
980 "%s(depth = %d)", caller, depth);
984 case GL_TEXTURE_CUBE_MAP:
985 /* Non-array cube maps are special because we have a gl_texture_image
988 if (zoffset + depth > 6) {
989 _mesa_error(ctx, GL_INVALID_VALUE,
990 "%s(zoffset + depth = %d)", caller, zoffset + depth);
993 /* check that the range of faces exist */
994 for (i = 0; i < depth; i++) {
995 GLenum face = GL_TEXTURE_CUBE_MAP_POSITIVE_X + zoffset + i;
996 if (!_mesa_select_tex_image(texObj, face, level)) {
997 /* non-existant face */
998 _mesa_error(ctx, GL_INVALID_OPERATION,
999 "%s(missing cube face)", caller);
1008 texImage = select_tex_image(texObj, target, level, zoffset);
1010 /* missing texture image */
1011 _mesa_error(ctx, GL_INVALID_OPERATION, "%s(missing image)", caller);
1015 if (xoffset + width > texImage->Width) {
1016 _mesa_error(ctx, GL_INVALID_VALUE,
1017 "%s(xoffset %d + width %d > %u)",
1018 caller, xoffset, width, texImage->Width);
1022 if (yoffset + height > texImage->Height) {
1023 _mesa_error(ctx, GL_INVALID_VALUE,
1024 "%s(yoffset %d + height %d > %u)",
1025 caller, yoffset, height, texImage->Height);
1029 if (target != GL_TEXTURE_CUBE_MAP) {
1030 /* Cube map error checking was done above */
1031 if (zoffset + depth > texImage->Depth) {
1032 _mesa_error(ctx, GL_INVALID_VALUE,
1033 "%s(zoffset %d + depth %d > %u)",
1034 caller, zoffset, depth, texImage->Depth);
1039 /* Extra checks for compressed textures */
1042 _mesa_get_format_block_size_3d(texImage->TexFormat, &bw, &bh, &bd);
1043 if (bw > 1 || bh > 1 || bd > 1) {
1044 /* offset must be multiple of block size */
1045 if (xoffset % bw != 0) {
1046 _mesa_error(ctx, GL_INVALID_VALUE,
1047 "%s(xoffset = %d)", caller, xoffset);
1050 if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
1051 if (yoffset % bh != 0) {
1052 _mesa_error(ctx, GL_INVALID_VALUE,
1053 "%s(yoffset = %d)", caller, yoffset);
1058 if (zoffset % bd != 0) {
1059 _mesa_error(ctx, GL_INVALID_VALUE,
1060 "%s(zoffset = %d)", caller, zoffset);
1064 /* The size must be a multiple of bw x bh x bd, or we must be using a
1065 * offset+size that exactly hits the edge of the image.
1067 if ((width % bw != 0) &&
1068 (xoffset + width != (GLint) texImage->Width)) {
1069 _mesa_error(ctx, GL_INVALID_VALUE,
1070 "%s(width = %d)", caller, width);
1074 if ((height % bh != 0) &&
1075 (yoffset + height != (GLint) texImage->Height)) {
1076 _mesa_error(ctx, GL_INVALID_VALUE,
1077 "%s(height = %d)", caller, height);
1081 if ((depth % bd != 0) &&
1082 (zoffset + depth != (GLint) texImage->Depth)) {
1083 _mesa_error(ctx, GL_INVALID_VALUE,
1084 "%s(depth = %d)", caller, depth);
1090 if (width == 0 || height == 0 || depth == 0) {
1091 /* Not an error, but nothing to do. Return 'true' so that the
1092 * caller simply returns.
1102 * Do PBO-related error checking for getting uncompressed images.
1103 * \return true if there was an error (or the GetTexImage is to be a no-op)
1106 pbo_error_check(struct gl_context *ctx, GLenum target,
1107 GLsizei width, GLsizei height, GLsizei depth,
1108 GLenum format, GLenum type, GLsizei clientMemSize,
1112 const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
1114 if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, width, height, depth,
1115 format, type, clientMemSize, pixels)) {
1116 if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
1117 _mesa_error(ctx, GL_INVALID_OPERATION,
1118 "%s(out of bounds PBO access)", caller);
1120 _mesa_error(ctx, GL_INVALID_OPERATION,
1121 "%s(out of bounds access: bufSize (%d) is too small)",
1122 caller, clientMemSize);
1127 if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
1128 /* PBO should not be mapped */
1129 if (_mesa_check_disallowed_mapping(ctx->Pack.BufferObj)) {
1130 _mesa_error(ctx, GL_INVALID_OPERATION,
1131 "%s(PBO is mapped)", caller);
1136 if (!_mesa_is_bufferobj(ctx->Pack.BufferObj) && !pixels) {
1137 /* not an error, do nothing */
1146 * Do error checking for all (non-compressed) get-texture-image functions.
1147 * \return true if any error, false if no errors.
1150 getteximage_error_check(struct gl_context *ctx,
1151 struct gl_texture_object *texObj,
1152 GLenum target, GLint level,
1153 GLint xoffset, GLint yoffset, GLint zoffset,
1154 GLsizei width, GLsizei height, GLsizei depth,
1155 GLenum format, GLenum type, GLsizei bufSize,
1156 GLvoid *pixels, const char *caller)
1158 struct gl_texture_image *texImage;
1159 GLenum baseFormat, err;
1164 if (texObj->Target == 0) {
1165 _mesa_error(ctx, GL_INVALID_OPERATION, "%s(invalid texture)", caller);
1169 maxLevels = _mesa_max_texture_levels(ctx, target);
1170 if (level < 0 || level >= maxLevels) {
1171 _mesa_error(ctx, GL_INVALID_VALUE, "%s(level = %d)", caller, level);
1175 err = _mesa_error_check_format_and_type(ctx, format, type);
1176 if (err != GL_NO_ERROR) {
1177 _mesa_error(ctx, err, "%s(format/type)", caller);
1181 if (dimensions_error_check(ctx, texObj, target, level,
1182 xoffset, yoffset, zoffset,
1183 width, height, depth, caller)) {
1187 if (pbo_error_check(ctx, target, width, height, depth,
1188 format, type, bufSize, pixels, caller)) {
1192 texImage = select_tex_image(texObj, target, level, zoffset);
1196 * Format and type checking has been moved up to GetnTexImage and
1197 * GetTextureImage so that it happens before getting the texImage object.
1200 baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
1202 /* Make sure the requested image format is compatible with the
1205 if (_mesa_is_color_format(format)
1206 && !_mesa_is_color_format(baseFormat)) {
1207 _mesa_error(ctx, GL_INVALID_OPERATION,
1208 "%s(format mismatch)", caller);
1211 else if (_mesa_is_depth_format(format)
1212 && !_mesa_is_depth_format(baseFormat)
1213 && !_mesa_is_depthstencil_format(baseFormat)) {
1214 _mesa_error(ctx, GL_INVALID_OPERATION,
1215 "%s(format mismatch)", caller);
1218 else if (_mesa_is_stencil_format(format)
1219 && !ctx->Extensions.ARB_texture_stencil8) {
1220 _mesa_error(ctx, GL_INVALID_ENUM,
1221 "%s(format=GL_STENCIL_INDEX)", caller);
1224 else if (_mesa_is_stencil_format(format)
1225 && !_mesa_is_depthstencil_format(baseFormat)
1226 && !_mesa_is_stencil_format(baseFormat)) {
1227 _mesa_error(ctx, GL_INVALID_OPERATION,
1228 "%s(format mismatch)", caller);
1231 else if (_mesa_is_ycbcr_format(format)
1232 && !_mesa_is_ycbcr_format(baseFormat)) {
1233 _mesa_error(ctx, GL_INVALID_OPERATION,
1234 "%s(format mismatch)", caller);
1237 else if (_mesa_is_depthstencil_format(format)
1238 && !_mesa_is_depthstencil_format(baseFormat)) {
1239 _mesa_error(ctx, GL_INVALID_OPERATION,
1240 "%s(format mismatch)", caller);
1243 else if (!_mesa_is_stencil_format(format) &&
1244 _mesa_is_enum_format_integer(format) !=
1245 _mesa_is_format_integer(texImage->TexFormat)) {
1246 _mesa_error(ctx, GL_INVALID_OPERATION,
1247 "%s(format mismatch)", caller);
1256 * Return the width, height and depth of a texture image.
1257 * This function must be resilient to bad parameter values since
1258 * this is called before full error checking.
1261 get_texture_image_dims(const struct gl_texture_object *texObj,
1262 GLenum target, GLint level,
1263 GLsizei *width, GLsizei *height, GLsizei *depth)
1265 const struct gl_texture_image *texImage = NULL;
1267 if (level >= 0 && level < MAX_TEXTURE_LEVELS) {
1268 texImage = _mesa_select_tex_image(texObj, target, level);
1272 *width = texImage->Width;
1273 *height = texImage->Height;
1274 if (target == GL_TEXTURE_CUBE_MAP) {
1278 *depth = texImage->Depth;
1282 *width = *height = *depth = 0;
1288 * Common code for all (uncompressed) get-texture-image functions.
1289 * \param texObj the texture object (should not be null)
1290 * \param target user-provided target, or 0 for DSA
1291 * \param level image level.
1292 * \param format pixel data format for returned image.
1293 * \param type pixel data type for returned image.
1294 * \param bufSize size of the pixels data buffer.
1295 * \param pixels returned pixel data.
1296 * \param caller name of calling function
1299 get_texture_image(struct gl_context *ctx,
1300 struct gl_texture_object *texObj,
1301 GLenum target, GLint level,
1302 GLint xoffset, GLint yoffset, GLint zoffset,
1303 GLsizei width, GLsizei height, GLint depth,
1304 GLenum format, GLenum type,
1305 GLvoid *pixels, const char *caller)
1307 struct gl_texture_image *texImage;
1308 unsigned firstFace, numFaces, i;
1311 FLUSH_VERTICES(ctx, 0);
1313 texImage = select_tex_image(texObj, target, level, zoffset);
1314 assert(texImage); /* should have been error checked already */
1316 if (_mesa_is_zero_size_texture(texImage)) {
1317 /* no image data to return */
1321 if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {
1322 _mesa_debug(ctx, "%s(tex %u) format = %s, w=%d, h=%d,"
1323 " dstFmt=0x%x, dstType=0x%x\n",
1324 caller, texObj->Name,
1325 _mesa_get_format_name(texImage->TexFormat),
1326 texImage->Width, texImage->Height,
1330 if (target == GL_TEXTURE_CUBE_MAP) {
1331 /* Compute stride between cube faces */
1332 imageStride = _mesa_image_image_stride(&ctx->Pack, width, height,
1334 firstFace = zoffset;
1341 firstFace = _mesa_tex_target_to_face(target);
1345 _mesa_lock_texture(ctx, texObj);
1347 for (i = 0; i < numFaces; i++) {
1348 texImage = texObj->Image[firstFace + i][level];
1351 ctx->Driver.GetTexSubImage(ctx, xoffset, yoffset, zoffset,
1352 width, height, depth,
1353 format, type, pixels, texImage);
1355 /* next cube face */
1356 pixels = (GLubyte *) pixels + imageStride;
1359 _mesa_unlock_texture(ctx, texObj);
1364 _mesa_GetnTexImageARB(GLenum target, GLint level, GLenum format, GLenum type,
1365 GLsizei bufSize, GLvoid *pixels)
1367 GET_CURRENT_CONTEXT(ctx);
1368 static const char *caller = "glGetnTexImageARB";
1369 GLsizei width, height, depth;
1370 struct gl_texture_object *texObj;
1372 if (!legal_getteximage_target(ctx, target, false)) {
1373 _mesa_error(ctx, GL_INVALID_ENUM, "%s", caller);
1377 texObj = _mesa_get_current_tex_object(ctx, target);
1380 get_texture_image_dims(texObj, target, level, &width, &height, &depth);
1382 if (getteximage_error_check(ctx, texObj, target, level,
1383 0, 0, 0, width, height, depth,
1384 format, type, bufSize, pixels, caller)) {
1388 get_texture_image(ctx, texObj, target, level,
1389 0, 0, 0, width, height, depth,
1390 format, type, pixels, caller);
1395 _mesa_GetTexImage(GLenum target, GLint level, GLenum format, GLenum type,
1398 GET_CURRENT_CONTEXT(ctx);
1399 static const char *caller = "glGetTexImage";
1400 GLsizei width, height, depth;
1401 struct gl_texture_object *texObj;
1403 if (!legal_getteximage_target(ctx, target, false)) {
1404 _mesa_error(ctx, GL_INVALID_ENUM, "%s", caller);
1408 texObj = _mesa_get_current_tex_object(ctx, target);
1411 get_texture_image_dims(texObj, target, level, &width, &height, &depth);
1413 if (getteximage_error_check(ctx, texObj, target, level,
1414 0, 0, 0, width, height, depth,
1415 format, type, INT_MAX, pixels, caller)) {
1419 get_texture_image(ctx, texObj, target, level,
1420 0, 0, 0, width, height, depth,
1421 format, type, pixels, caller);
1426 _mesa_GetTextureImage(GLuint texture, GLint level, GLenum format, GLenum type,
1427 GLsizei bufSize, GLvoid *pixels)
1429 GET_CURRENT_CONTEXT(ctx);
1430 GLsizei width, height, depth;
1431 static const char *caller = "glGetTextureImage";
1432 struct gl_texture_object *texObj =
1433 _mesa_lookup_texture_err(ctx, texture, caller);
1439 get_texture_image_dims(texObj, texObj->Target, level,
1440 &width, &height, &depth);
1442 if (getteximage_error_check(ctx, texObj, texObj->Target, level,
1443 0, 0, 0, width, height, depth,
1444 format, type, bufSize, pixels, caller)) {
1448 get_texture_image(ctx, texObj, texObj->Target, level,
1449 0, 0, 0, width, height, depth,
1450 format, type, pixels, caller);
1455 _mesa_GetTextureSubImage(GLuint texture, GLint level,
1456 GLint xoffset, GLint yoffset, GLint zoffset,
1457 GLsizei width, GLsizei height, GLsizei depth,
1458 GLenum format, GLenum type, GLsizei bufSize,
1461 GET_CURRENT_CONTEXT(ctx);
1462 static const char *caller = "glGetTextureSubImage";
1463 struct gl_texture_object *texObj =
1464 _mesa_lookup_texture_err(ctx, texture, caller);
1470 if (getteximage_error_check(ctx, texObj, texObj->Target, level,
1471 xoffset, yoffset, zoffset, width, height, depth,
1472 format, type, bufSize, pixels, caller)) {
1476 get_texture_image(ctx, texObj, texObj->Target, level,
1477 xoffset, yoffset, zoffset, width, height, depth,
1478 format, type, pixels, caller);
1484 * Compute the number of bytes which will be written when retrieving
1485 * a sub-region of a compressed texture.
1488 packed_compressed_size(GLuint dimensions, mesa_format format,
1489 GLsizei width, GLsizei height, GLsizei depth,
1490 const struct gl_pixelstore_attrib *packing)
1492 struct compressed_pixelstore st;
1495 _mesa_compute_compressed_pixelstore(dimensions, format,
1496 width, height, depth,
1499 (st.CopySlices - 1) * st.TotalRowsPerSlice * st.TotalBytesPerRow +
1501 (st.CopyRowsPerSlice - 1) * st.TotalBytesPerRow +
1509 * Do error checking for getting compressed texture images.
1510 * \return true if any error, false if no errors.
1513 getcompressedteximage_error_check(struct gl_context *ctx,
1514 struct gl_texture_object *texObj,
1515 GLenum target, GLint level,
1516 GLint xoffset, GLint yoffset, GLint zoffset,
1517 GLsizei width, GLsizei height, GLsizei depth,
1518 GLsizei bufSize, GLvoid *pixels,
1521 struct gl_texture_image *texImage;
1528 if (texObj->Target == 0) {
1529 _mesa_error(ctx, GL_INVALID_OPERATION, "%s(invalid texture)", caller);
1533 maxLevels = _mesa_max_texture_levels(ctx, target);
1534 if (level < 0 || level >= maxLevels) {
1535 _mesa_error(ctx, GL_INVALID_VALUE,
1536 "%s(bad level = %d)", caller, level);
1540 if (dimensions_error_check(ctx, texObj, target, level,
1541 xoffset, yoffset, zoffset,
1542 width, height, depth, caller)) {
1546 texImage = select_tex_image(texObj, target, level, zoffset);
1549 if (!_mesa_is_format_compressed(texImage->TexFormat)) {
1550 _mesa_error(ctx, GL_INVALID_OPERATION,
1551 "%s(texture is not compressed)", caller);
1555 /* Check for invalid pixel storage modes */
1556 dimensions = _mesa_get_texture_dimensions(texObj->Target);
1557 if (!_mesa_compressed_pixel_storage_error_check(ctx, dimensions,
1563 /* Compute number of bytes that may be touched in the dest buffer */
1564 totalBytes = packed_compressed_size(dimensions, texImage->TexFormat,
1565 width, height, depth,
1568 /* Do dest buffer bounds checking */
1569 if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
1570 /* do bounds checking on PBO write */
1571 if ((GLubyte *) pixels + totalBytes >
1572 (GLubyte *) ctx->Pack.BufferObj->Size) {
1573 _mesa_error(ctx, GL_INVALID_OPERATION,
1574 "%s(out of bounds PBO access)", caller);
1578 /* make sure PBO is not mapped */
1579 if (_mesa_check_disallowed_mapping(ctx->Pack.BufferObj)) {
1580 _mesa_error(ctx, GL_INVALID_OPERATION, "%s(PBO is mapped)", caller);
1585 /* do bounds checking on writing to client memory */
1586 if (totalBytes > bufSize) {
1587 _mesa_error(ctx, GL_INVALID_OPERATION,
1588 "%s(out of bounds access: bufSize (%d) is too small)",
1594 if (!_mesa_is_bufferobj(ctx->Pack.BufferObj) && !pixels) {
1595 /* not an error, but do nothing */
1604 * Common helper for all glGetCompressed-teximage functions.
1607 get_compressed_texture_image(struct gl_context *ctx,
1608 struct gl_texture_object *texObj,
1609 GLenum target, GLint level,
1610 GLint xoffset, GLint yoffset, GLint zoffset,
1611 GLsizei width, GLsizei height, GLint depth,
1615 struct gl_texture_image *texImage;
1616 unsigned firstFace, numFaces, i, imageStride;
1618 FLUSH_VERTICES(ctx, 0);
1620 texImage = select_tex_image(texObj, target, level, zoffset);
1621 assert(texImage); /* should have been error checked already */
1623 if (_mesa_is_zero_size_texture(texImage))
1626 if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {
1628 "%s(tex %u) format = %s, w=%d, h=%d\n",
1629 caller, texObj->Name,
1630 _mesa_get_format_name(texImage->TexFormat),
1631 texImage->Width, texImage->Height);
1634 if (target == GL_TEXTURE_CUBE_MAP) {
1635 struct compressed_pixelstore store;
1637 /* Compute image stride between cube faces */
1638 _mesa_compute_compressed_pixelstore(2, texImage->TexFormat,
1639 width, height, depth,
1640 &ctx->Pack, &store);
1641 imageStride = store.TotalBytesPerRow * store.TotalRowsPerSlice;
1643 firstFace = zoffset;
1650 firstFace = _mesa_tex_target_to_face(target);
1654 _mesa_lock_texture(ctx, texObj);
1656 for (i = 0; i < numFaces; i++) {
1657 texImage = texObj->Image[firstFace + i][level];
1660 ctx->Driver.GetCompressedTexSubImage(ctx, texImage,
1661 xoffset, yoffset, zoffset,
1662 width, height, depth, pixels);
1664 /* next cube face */
1665 pixels = (GLubyte *) pixels + imageStride;
1668 _mesa_unlock_texture(ctx, texObj);
1673 _mesa_GetnCompressedTexImageARB(GLenum target, GLint level, GLsizei bufSize,
1676 GET_CURRENT_CONTEXT(ctx);
1677 static const char *caller = "glGetnCompressedTexImageARB";
1678 GLsizei width, height, depth;
1679 struct gl_texture_object *texObj;
1681 if (!legal_getteximage_target(ctx, target, false)) {
1682 _mesa_error(ctx, GL_INVALID_ENUM, "%s", caller);
1686 texObj = _mesa_get_current_tex_object(ctx, target);
1689 get_texture_image_dims(texObj, target, level, &width, &height, &depth);
1691 if (getcompressedteximage_error_check(ctx, texObj, target, level,
1692 0, 0, 0, width, height, depth,
1693 INT_MAX, pixels, caller)) {
1697 get_compressed_texture_image(ctx, texObj, target, level,
1698 0, 0, 0, width, height, depth,
1704 _mesa_GetCompressedTexImage(GLenum target, GLint level, GLvoid *pixels)
1706 GET_CURRENT_CONTEXT(ctx);
1707 static const char *caller = "glGetCompressedTexImage";
1708 GLsizei width, height, depth;
1709 struct gl_texture_object *texObj;
1711 if (!legal_getteximage_target(ctx, target, false)) {
1712 _mesa_error(ctx, GL_INVALID_ENUM, "%s", caller);
1716 texObj = _mesa_get_current_tex_object(ctx, target);
1719 get_texture_image_dims(texObj, target, level,
1720 &width, &height, &depth);
1722 if (getcompressedteximage_error_check(ctx, texObj, target, level,
1723 0, 0, 0, width, height, depth,
1724 INT_MAX, pixels, caller)) {
1728 get_compressed_texture_image(ctx, texObj, target, level,
1729 0, 0, 0, width, height, depth,
1735 _mesa_GetCompressedTextureImage(GLuint texture, GLint level,
1736 GLsizei bufSize, GLvoid *pixels)
1738 GET_CURRENT_CONTEXT(ctx);
1739 static const char *caller = "glGetCompressedTextureImage";
1740 GLsizei width, height, depth;
1741 struct gl_texture_object *texObj =
1742 _mesa_lookup_texture_err(ctx, texture, caller);
1748 get_texture_image_dims(texObj, texObj->Target, level,
1749 &width, &height, &depth);
1751 if (getcompressedteximage_error_check(ctx, texObj, texObj->Target, level,
1752 0, 0, 0, width, height, depth,
1753 bufSize, pixels, caller)) {
1757 get_compressed_texture_image(ctx, texObj, texObj->Target, level,
1758 0, 0, 0, width, height, depth,
1764 _mesa_GetCompressedTextureSubImage(GLuint texture, GLint level,
1765 GLint xoffset, GLint yoffset,
1766 GLint zoffset, GLsizei width,
1767 GLsizei height, GLsizei depth,
1768 GLsizei bufSize, void *pixels)
1770 GET_CURRENT_CONTEXT(ctx);
1771 static const char *caller = "glGetCompressedTextureImage";
1772 struct gl_texture_object *texObj;
1774 texObj = _mesa_lookup_texture_err(ctx, texture, caller);
1779 if (getcompressedteximage_error_check(ctx, texObj, texObj->Target, level,
1780 xoffset, yoffset, zoffset,
1781 width, height, depth,
1782 bufSize, pixels, caller)) {
1786 get_compressed_texture_image(ctx, texObj, texObj->Target, level,
1787 xoffset, yoffset, zoffset,
1788 width, height, depth,