diff options
Diffstat (limited to 'mesalib/src/mesa/main/texgetimage.c')
| -rw-r--r-- | mesalib/src/mesa/main/texgetimage.c | 1836 |
1 files changed, 918 insertions, 918 deletions
diff --git a/mesalib/src/mesa/main/texgetimage.c b/mesalib/src/mesa/main/texgetimage.c index 21d9140c5..fe5ac0a89 100644 --- a/mesalib/src/mesa/main/texgetimage.c +++ b/mesalib/src/mesa/main/texgetimage.c @@ -1,918 +1,918 @@ -/* - * Mesa 3-D graphics library - * Version: 7.7 - * - * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. - * Copyright (c) 2009 VMware, Inc. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -/** - * Code for glGetTexImage() and glGetCompressedTexImage(). - */ - - -#include "glheader.h" -#include "bufferobj.h" -#include "enums.h" -#include "context.h" -#include "formats.h" -#include "image.h" -#include "mfeatures.h" -#include "mtypes.h" -#include "pack.h" -#include "pbo.h" -#include "texgetimage.h" -#include "teximage.h" - - - -/** - * Can the given type represent negative values? - */ -static INLINE GLboolean -type_with_negative_values(GLenum type) -{ - switch (type) { - case GL_BYTE: - case GL_SHORT: - case GL_INT: - case GL_FLOAT: - case GL_HALF_FLOAT_ARB: - return GL_TRUE; - default: - return GL_FALSE; - } -} - - -/** - * glGetTexImage for color index pixels. - */ -static void -get_tex_color_index(struct gl_context *ctx, GLuint dimensions, - GLenum format, GLenum type, GLvoid *pixels, - const struct gl_texture_image *texImage) -{ - const GLint width = texImage->Width; - const GLint height = texImage->Height; - const GLint depth = texImage->Depth; - const GLuint indexBits = - _mesa_get_format_bits(texImage->TexFormat, GL_TEXTURE_INDEX_SIZE_EXT); - const GLbitfield transferOps = 0x0; - GLint img, row, col; - - for (img = 0; img < depth; img++) { - for (row = 0; row < height; row++) { - GLuint indexRow[MAX_WIDTH] = { 0 }; - void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, - width, height, format, type, - img, row, 0); - assert(dest); - - if (indexBits == 8) { - const GLubyte *src = (const GLubyte *) texImage->Data; - src += width * (img * texImage->Height + row); - for (col = 0; col < width; col++) { - indexRow[col] = src[col]; - } - } - else if (indexBits == 16) { - const GLushort *src = (const GLushort *) texImage->Data; - src += width * (img * texImage->Height + row); - for (col = 0; col < width; col++) { - indexRow[col] = src[col]; - } - } - else { - _mesa_problem(ctx, "Color index problem in _mesa_GetTexImage"); - } - _mesa_pack_index_span(ctx, width, type, dest, - indexRow, &ctx->Pack, transferOps); - } - } -} - - -/** - * glGetTexImage for depth/Z pixels. - */ -static void -get_tex_depth(struct gl_context *ctx, GLuint dimensions, - GLenum format, GLenum type, GLvoid *pixels, - const struct gl_texture_image *texImage) -{ - const GLint width = texImage->Width; - const GLint height = texImage->Height; - const GLint depth = texImage->Depth; - GLint img, row, col; - GLfloat *depthRow = (GLfloat *) malloc(width * sizeof(GLfloat)); - - if (!depthRow) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); - return; - } - - for (img = 0; img < depth; img++) { - for (row = 0; row < height; row++) { - void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, - width, height, format, type, - img, row, 0); - assert(dest); - - for (col = 0; col < width; col++) { - texImage->FetchTexelf(texImage, col, row, img, depthRow + col); - } - _mesa_pack_depth_span(ctx, width, dest, type, depthRow, &ctx->Pack); - } - } - - free(depthRow); -} - - -/** - * glGetTexImage for depth/stencil pixels. - */ -static void -get_tex_depth_stencil(struct gl_context *ctx, GLuint dimensions, - GLenum format, GLenum type, GLvoid *pixels, - const struct gl_texture_image *texImage) -{ - const GLint width = texImage->Width; - const GLint height = texImage->Height; - const GLint depth = texImage->Depth; - const GLuint *src = (const GLuint *) texImage->Data; - GLint img, row; - - for (img = 0; img < depth; img++) { - for (row = 0; row < height; row++) { - void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, - width, height, format, type, - img, row, 0); - memcpy(dest, src, width * sizeof(GLuint)); - if (ctx->Pack.SwapBytes) { - _mesa_swap4((GLuint *) dest, width); - } - - src += width * row + width * height * img; - } - } -} - - -/** - * glGetTexImage for YCbCr pixels. - */ -static void -get_tex_ycbcr(struct gl_context *ctx, GLuint dimensions, - GLenum format, GLenum type, GLvoid *pixels, - const struct gl_texture_image *texImage) -{ - const GLint width = texImage->Width; - const GLint height = texImage->Height; - const GLint depth = texImage->Depth; - const GLint rowstride = texImage->RowStride; - const GLushort *src = (const GLushort *) texImage->Data; - GLint img, row; - - for (img = 0; img < depth; img++) { - for (row = 0; row < height; row++) { - void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, - width, height, format, type, - img, row, 0); - memcpy(dest, src, width * sizeof(GLushort)); - - /* check for byte swapping */ - if ((texImage->TexFormat == MESA_FORMAT_YCBCR - && type == GL_UNSIGNED_SHORT_8_8_REV_MESA) || - (texImage->TexFormat == MESA_FORMAT_YCBCR_REV - && type == GL_UNSIGNED_SHORT_8_8_MESA)) { - if (!ctx->Pack.SwapBytes) - _mesa_swap2((GLushort *) dest, width); - } - else if (ctx->Pack.SwapBytes) { - _mesa_swap2((GLushort *) dest, width); - } - - src += rowstride; - } - } -} - - -#if FEATURE_EXT_texture_sRGB - - -/** - * Convert a float value from linear space to a - * non-linear sRGB value in [0, 255]. - * Not terribly efficient. - */ -static INLINE GLfloat -linear_to_nonlinear(GLfloat cl) -{ - /* can't have values outside [0, 1] */ - GLfloat cs; - if (cl < 0.0031308f) { - cs = 12.92f * cl; - } - else { - cs = (GLfloat)(1.055 * pow(cl, 0.41666) - 0.055); - } - return cs; -} - - -/** - * glGetTexImagefor sRGB pixels; - */ -static void -get_tex_srgb(struct gl_context *ctx, GLuint dimensions, - GLenum format, GLenum type, GLvoid *pixels, - const struct gl_texture_image *texImage) -{ - const GLint width = texImage->Width; - const GLint height = texImage->Height; - const GLint depth = texImage->Depth; - const GLbitfield transferOps = 0x0; - GLint img, row; - GLfloat (*rgba)[4] = (GLfloat (*)[4]) malloc(4 * width * sizeof(GLfloat)); - - if (!rgba) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); - return; - } - - for (img = 0; img < depth; img++) { - for (row = 0; row < height; row++) { - void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, - width, height, format, type, - img, row, 0); - - GLint col; - - /* convert row to RGBA format */ - for (col = 0; col < width; col++) { - texImage->FetchTexelf(texImage, col, row, img, rgba[col]); - if (texImage->_BaseFormat == GL_LUMINANCE) { - rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]); - rgba[col][GCOMP] = 0.0; - rgba[col][BCOMP] = 0.0; - } - else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) { - rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]); - rgba[col][GCOMP] = 0.0; - rgba[col][BCOMP] = 0.0; - } - else if (texImage->_BaseFormat == GL_RGB || - texImage->_BaseFormat == GL_RGBA) { - rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]); - rgba[col][GCOMP] = linear_to_nonlinear(rgba[col][GCOMP]); - rgba[col][BCOMP] = linear_to_nonlinear(rgba[col][BCOMP]); - } - } - _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba, - format, type, dest, - &ctx->Pack, transferOps); - } - } - - free(rgba); -} - - -#else /* FEATURE_EXT_texture_sRGB */ - - -static INLINE void -get_tex_srgb(struct gl_context *ctx, GLuint dimensions, - GLenum format, GLenum type, GLvoid *pixels, - const struct gl_texture_image *texImage) -{ - ASSERT_NO_FEATURE(); -} - - -#endif /* FEATURE_EXT_texture_sRGB */ - - -/** - * glGetTexImagefor RGBA, Luminance, etc. pixels. - * This is the slow way since we use texture sampling. - */ -static void -get_tex_rgba(struct gl_context *ctx, GLuint dimensions, - GLenum format, GLenum type, GLvoid *pixels, - const struct gl_texture_image *texImage) -{ - const GLint width = texImage->Width; - const GLint height = texImage->Height; - const GLint depth = texImage->Depth; - /* Normally, no pixel transfer ops are performed during glGetTexImage. - * The only possible exception is component clamping to [0,1]. - */ - GLbitfield transferOps = 0x0; - GLint img, row; - GLfloat (*rgba)[4] = (GLfloat (*)[4]) malloc(4 * width * sizeof(GLfloat)); - - if (!rgba) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); - return; - } - - for (img = 0; img < depth; img++) { - for (row = 0; row < height; row++) { - void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, - width, height, format, type, - img, row, 0); - GLint col; - GLenum dataType = _mesa_get_format_datatype(texImage->TexFormat); - - /* clamp does not apply to GetTexImage (final conversion)? - * Looks like we need clamp though when going from format - * containing negative values to unsigned format. - */ - if (format == GL_LUMINANCE || format == GL_LUMINANCE_ALPHA) { - transferOps |= IMAGE_CLAMP_BIT; - } - else if (!type_with_negative_values(type) && - (dataType == GL_FLOAT || - dataType == GL_SIGNED_NORMALIZED)) { - transferOps |= IMAGE_CLAMP_BIT; - } - - for (col = 0; col < width; col++) { - texImage->FetchTexelf(texImage, col, row, img, rgba[col]); - if (texImage->_BaseFormat == GL_ALPHA) { - rgba[col][RCOMP] = 0.0F; - rgba[col][GCOMP] = 0.0F; - rgba[col][BCOMP] = 0.0F; - } - else if (texImage->_BaseFormat == GL_LUMINANCE) { - rgba[col][GCOMP] = 0.0F; - rgba[col][BCOMP] = 0.0F; - rgba[col][ACOMP] = 1.0F; - } - else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) { - rgba[col][GCOMP] = 0.0F; - rgba[col][BCOMP] = 0.0F; - } - else if (texImage->_BaseFormat == GL_INTENSITY) { - rgba[col][GCOMP] = 0.0F; - rgba[col][BCOMP] = 0.0F; - rgba[col][ACOMP] = 1.0F; - } - } - _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba, - format, type, dest, - &ctx->Pack, transferOps); - } - } - - free(rgba); -} - - -/** - * Try to do glGetTexImage() with simple memcpy(). - * \return GL_TRUE if done, GL_FALSE otherwise - */ -static GLboolean -get_tex_memcpy(struct gl_context *ctx, GLenum format, GLenum type, GLvoid *pixels, - const struct gl_texture_object *texObj, - const struct gl_texture_image *texImage) -{ - GLboolean memCopy = GL_FALSE; - - /* Texture image should have been mapped already */ - assert(texImage->Data); - - /* - * Check if the src/dst formats are compatible. - * Also note that GL's pixel transfer ops don't apply to glGetTexImage() - * so we don't have to worry about those. - * XXX more format combinations could be supported here. - */ - if ((texObj->Target == GL_TEXTURE_1D || - texObj->Target == GL_TEXTURE_2D || - texObj->Target == GL_TEXTURE_RECTANGLE || - (texObj->Target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && - texObj->Target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z))) { - if (texImage->TexFormat == MESA_FORMAT_ARGB8888 && - format == GL_BGRA && - type == GL_UNSIGNED_BYTE && - !ctx->Pack.SwapBytes && - _mesa_little_endian()) { - memCopy = GL_TRUE; - } - else if (texImage->TexFormat == MESA_FORMAT_AL88 && - format == GL_LUMINANCE_ALPHA && - type == GL_UNSIGNED_BYTE && - !ctx->Pack.SwapBytes && - _mesa_little_endian()) { - memCopy = GL_TRUE; - } - else if (texImage->TexFormat == MESA_FORMAT_L8 && - format == GL_LUMINANCE && - type == GL_UNSIGNED_BYTE) { - memCopy = GL_TRUE; - } - else if (texImage->TexFormat == MESA_FORMAT_L16 && - format == GL_LUMINANCE && - type == GL_UNSIGNED_SHORT) { - memCopy = GL_TRUE; - } - else if (texImage->TexFormat == MESA_FORMAT_A8 && - format == GL_ALPHA && - type == GL_UNSIGNED_BYTE) { - memCopy = GL_TRUE; - } - else if (texImage->TexFormat == MESA_FORMAT_A16 && - format == GL_ALPHA && - type == GL_UNSIGNED_SHORT) { - memCopy = GL_TRUE; - } - } - - if (memCopy) { - const GLuint bpp = _mesa_get_format_bytes(texImage->TexFormat); - const GLuint bytesPerRow = texImage->Width * bpp; - GLubyte *dst = - _mesa_image_address2d(&ctx->Pack, pixels, texImage->Width, - texImage->Height, format, type, 0, 0); - const GLint dstRowStride = - _mesa_image_row_stride(&ctx->Pack, texImage->Width, format, type); - const GLubyte *src = texImage->Data; - const GLint srcRowStride = texImage->RowStride * bpp; - GLuint row; - - if (bytesPerRow == dstRowStride && bytesPerRow == srcRowStride) { - memcpy(dst, src, bytesPerRow * texImage->Height); - } - else { - for (row = 0; row < texImage->Height; row++) { - memcpy(dst, src, bytesPerRow); - dst += dstRowStride; - src += srcRowStride; - } - } - } - - return memCopy; -} - - -/** - * This is the software fallback for Driver.GetTexImage(). - * All error checking will have been done before this routine is called. - * The texture image must be mapped. - */ -void -_mesa_get_teximage(struct gl_context *ctx, GLenum target, GLint level, - GLenum format, GLenum type, GLvoid *pixels, - struct gl_texture_object *texObj, - struct gl_texture_image *texImage) -{ - GLuint dimensions; - - /* If we get here, the texture image should be mapped */ - assert(texImage->Data); - - switch (target) { - case GL_TEXTURE_1D: - dimensions = 1; - break; - case GL_TEXTURE_3D: - dimensions = 3; - break; - default: - dimensions = 2; - } - - if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { - /* Packing texture image into a PBO. - * Map the (potentially) VRAM-based buffer into our process space so - * we can write into it with the code below. - * A hardware driver might use a sophisticated blit to move the - * texture data to the PBO if the PBO is in VRAM along with the texture. - */ - GLubyte *buf = (GLubyte *) - ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT, - GL_WRITE_ONLY_ARB, ctx->Pack.BufferObj); - if (!buf) { - /* out of memory or other unexpected error */ - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage(map PBO failed)"); - return; - } - /* <pixels> was an offset into the PBO. - * Now make it a real, client-side pointer inside the mapped region. - */ - pixels = ADD_POINTERS(buf, pixels); - } - - if (get_tex_memcpy(ctx, format, type, pixels, texObj, texImage)) { - /* all done */ - } - else if (format == GL_COLOR_INDEX) { - get_tex_color_index(ctx, dimensions, format, type, pixels, texImage); - } - else if (format == GL_DEPTH_COMPONENT) { - get_tex_depth(ctx, dimensions, format, type, pixels, texImage); - } - else if (format == GL_DEPTH_STENCIL_EXT) { - get_tex_depth_stencil(ctx, dimensions, format, type, pixels, texImage); - } - else if (format == GL_YCBCR_MESA) { - get_tex_ycbcr(ctx, dimensions, format, type, pixels, texImage); - } - else if (_mesa_get_format_color_encoding(texImage->TexFormat) == GL_SRGB) { - get_tex_srgb(ctx, dimensions, format, type, pixels, texImage); - } - else { - get_tex_rgba(ctx, dimensions, format, type, pixels, texImage); - } - - if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { - ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT, - ctx->Pack.BufferObj); - } -} - - - -/** - * This is the software fallback for Driver.GetCompressedTexImage(). - * All error checking will have been done before this routine is called. - */ -void -_mesa_get_compressed_teximage(struct gl_context *ctx, GLenum target, GLint level, - GLvoid *img, - struct gl_texture_object *texObj, - struct gl_texture_image *texImage) -{ - const GLuint row_stride = _mesa_format_row_stride(texImage->TexFormat, - texImage->Width); - const GLuint row_stride_stored = _mesa_format_row_stride(texImage->TexFormat, - texImage->RowStride); - GLuint i; - - if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { - /* pack texture image into a PBO */ - GLubyte *buf = (GLubyte *) - ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT, - GL_WRITE_ONLY_ARB, ctx->Pack.BufferObj); - if (!buf) { - /* out of memory or other unexpected error */ - _mesa_error(ctx, GL_OUT_OF_MEMORY, - "glGetCompresssedTexImage(map PBO failed)"); - return; - } - img = ADD_POINTERS(buf, img); - } - - /* no pixelstore or pixel transfer, but respect stride */ - - if (row_stride == row_stride_stored) { - const GLuint size = _mesa_format_image_size(texImage->TexFormat, - texImage->Width, - texImage->Height, - texImage->Depth); - memcpy(img, texImage->Data, size); - } - else { - GLuint bw, bh; - _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh); - for (i = 0; i < (texImage->Height + bh - 1) / bh; i++) { - memcpy((GLubyte *)img + i * row_stride, - (GLubyte *)texImage->Data + i * row_stride_stored, - row_stride); - } - } - - if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { - ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT, - ctx->Pack.BufferObj); - } -} - - - -/** - * Do error checking for a glGetTexImage() call. - * \return GL_TRUE if any error, GL_FALSE if no errors. - */ -static GLboolean -getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level, - GLenum format, GLenum type, GLvoid *pixels ) -{ - struct gl_texture_object *texObj; - struct gl_texture_image *texImage; - const GLint maxLevels = _mesa_max_texture_levels(ctx, target); - GLenum baseFormat; - - if (maxLevels == 0) { - _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target=0x%x)", target); - return GL_TRUE; - } - - if (level < 0 || level >= maxLevels) { - _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" ); - return GL_TRUE; - } - - if (_mesa_sizeof_packed_type(type) <= 0) { - _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(type)" ); - return GL_TRUE; - } - - if (_mesa_components_in_format(format) <= 0 || - format == GL_STENCIL_INDEX) { - _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(format)" ); - return GL_TRUE; - } - - if (!ctx->Extensions.EXT_paletted_texture && _mesa_is_index_format(format)) { - _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)"); - return GL_TRUE; - } - - if (!ctx->Extensions.ARB_depth_texture && _mesa_is_depth_format(format)) { - _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)"); - return GL_TRUE; - } - - if (!ctx->Extensions.MESA_ycbcr_texture && _mesa_is_ycbcr_format(format)) { - _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)"); - return GL_TRUE; - } - - if (!ctx->Extensions.EXT_packed_depth_stencil - && _mesa_is_depthstencil_format(format)) { - _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)"); - return GL_TRUE; - } - - if (!ctx->Extensions.ATI_envmap_bumpmap - && _mesa_is_dudv_format(format)) { - _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)"); - return GL_TRUE; - } - - texObj = _mesa_get_current_tex_object(ctx, target); - - if (!texObj || _mesa_is_proxy_texture(target)) { - _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target)"); - return GL_TRUE; - } - - texImage = _mesa_select_tex_image(ctx, texObj, target, level); - if (!texImage) { - /* out of memory */ - return GL_TRUE; - } - - baseFormat = _mesa_get_format_base_format(texImage->TexFormat); - - /* Make sure the requested image format is compatible with the - * texture's format. Note that a color index texture can be converted - * to RGBA so that combo is allowed. - */ - if (_mesa_is_color_format(format) - && !_mesa_is_color_format(baseFormat) - && !_mesa_is_index_format(baseFormat)) { - _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)"); - return GL_TRUE; - } - else if (_mesa_is_index_format(format) - && !_mesa_is_index_format(baseFormat)) { - _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)"); - return GL_TRUE; - } - else if (_mesa_is_depth_format(format) - && !_mesa_is_depth_format(baseFormat) - && !_mesa_is_depthstencil_format(baseFormat)) { - _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)"); - return GL_TRUE; - } - else if (_mesa_is_ycbcr_format(format) - && !_mesa_is_ycbcr_format(baseFormat)) { - _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)"); - return GL_TRUE; - } - else if (_mesa_is_depthstencil_format(format) - && !_mesa_is_depthstencil_format(baseFormat)) { - _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)"); - return GL_TRUE; - } - else if (_mesa_is_dudv_format(format) - && !_mesa_is_dudv_format(baseFormat)) { - _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)"); - return GL_TRUE; - } - - if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { - /* packing texture image into a PBO */ - const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2; - if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width, - texImage->Height, texImage->Depth, - format, type, pixels)) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glGetTexImage(out of bounds PBO write)"); - return GL_TRUE; - } - - /* PBO should not be mapped */ - if (_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glGetTexImage(PBO is mapped)"); - return GL_TRUE; - } - } - - return GL_FALSE; -} - - - -/** - * Get texture image. Called by glGetTexImage. - * - * \param target texture target. - * \param level image level. - * \param format pixel data format for returned image. - * \param type pixel data type for returned image. - * \param pixels returned pixel data. - */ -void GLAPIENTRY -_mesa_GetTexImage( GLenum target, GLint level, GLenum format, - GLenum type, GLvoid *pixels ) -{ - struct gl_texture_object *texObj; - struct gl_texture_image *texImage; - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); - - if (getteximage_error_check(ctx, target, level, format, type, pixels)) { - return; - } - - if (!_mesa_is_bufferobj(ctx->Pack.BufferObj) && !pixels) { - /* not an error, do nothing */ - return; - } - - texObj = _mesa_get_current_tex_object(ctx, target); - texImage = _mesa_select_tex_image(ctx, texObj, target, level); - - if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) { - _mesa_debug(ctx, "glGetTexImage(tex %u) format = %s, w=%d, h=%d," - " dstFmt=0x%x, dstType=0x%x\n", - texObj->Name, - _mesa_get_format_name(texImage->TexFormat), - texImage->Width, texImage->Height, - format, type); - } - - _mesa_lock_texture(ctx, texObj); - { - ctx->Driver.GetTexImage(ctx, target, level, format, type, pixels, - texObj, texImage); - } - _mesa_unlock_texture(ctx, texObj); -} - - - -/** - * Do error checking for a glGetCompressedTexImage() call. - * \return GL_TRUE if any error, GL_FALSE if no errors. - */ -static GLboolean -getcompressedteximage_error_check(struct gl_context *ctx, GLenum target, - GLint level, GLvoid *img) -{ - struct gl_texture_object *texObj; - struct gl_texture_image *texImage; - const GLint maxLevels = _mesa_max_texture_levels(ctx, target); - - if (maxLevels == 0) { - _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImage(target=0x%x)", - target); - return GL_TRUE; - } - - if (level < 0 || level >= maxLevels) { - _mesa_error(ctx, GL_INVALID_VALUE, - "glGetCompressedTexImageARB(bad level = %d)", level); - return GL_TRUE; - } - - if (_mesa_is_proxy_texture(target)) { - _mesa_error(ctx, GL_INVALID_ENUM, - "glGetCompressedTexImageARB(bad target = %s)", - _mesa_lookup_enum_by_nr(target)); - return GL_TRUE; - } - - texObj = _mesa_get_current_tex_object(ctx, target); - if (!texObj) { - _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImageARB(target)"); - return GL_TRUE; - } - - texImage = _mesa_select_tex_image(ctx, texObj, target, level); - - if (!texImage) { - /* probably invalid mipmap level */ - _mesa_error(ctx, GL_INVALID_VALUE, - "glGetCompressedTexImageARB(level)"); - return GL_TRUE; - } - - if (!_mesa_is_format_compressed(texImage->TexFormat)) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glGetCompressedTexImageARB(texture is not compressed)"); - return GL_TRUE; - } - - if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { - GLuint compressedSize; - - /* make sure PBO is not mapped */ - if (_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glGetCompressedTexImage(PBO is mapped)"); - return GL_TRUE; - } - - compressedSize = _mesa_format_image_size(texImage->TexFormat, - texImage->Width, - texImage->Height, - texImage->Depth); - - /* do bounds checking on PBO write */ - if ((const GLubyte *) img + compressedSize > - (const GLubyte *) ctx->Pack.BufferObj->Size) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glGetCompressedTexImage(out of bounds PBO write)"); - return GL_TRUE; - } - } - - return GL_FALSE; -} - - -void GLAPIENTRY -_mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img) -{ - struct gl_texture_object *texObj; - struct gl_texture_image *texImage; - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); - - if (getcompressedteximage_error_check(ctx, target, level, img)) { - return; - } - - if (_mesa_is_bufferobj(ctx->Pack.BufferObj) && !img) { - /* not an error, do nothing */ - return; - } - - texObj = _mesa_get_current_tex_object(ctx, target); - texImage = _mesa_select_tex_image(ctx, texObj, target, level); - - if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) { - _mesa_debug(ctx, - "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n", - texObj->Name, - _mesa_get_format_name(texImage->TexFormat), - texImage->Width, texImage->Height); - } - - _mesa_lock_texture(ctx, texObj); - { - ctx->Driver.GetCompressedTexImage(ctx, target, level, img, - texObj, texImage); - } - _mesa_unlock_texture(ctx, texObj); -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.7
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ * Copyright (c) 2009 VMware, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * Code for glGetTexImage() and glGetCompressedTexImage().
+ */
+
+
+#include "glheader.h"
+#include "bufferobj.h"
+#include "enums.h"
+#include "context.h"
+#include "formats.h"
+#include "image.h"
+#include "mfeatures.h"
+#include "mtypes.h"
+#include "pack.h"
+#include "pbo.h"
+#include "texgetimage.h"
+#include "teximage.h"
+
+
+
+/**
+ * Can the given type represent negative values?
+ */
+static INLINE GLboolean
+type_with_negative_values(GLenum type)
+{
+ switch (type) {
+ case GL_BYTE:
+ case GL_SHORT:
+ case GL_INT:
+ case GL_FLOAT:
+ case GL_HALF_FLOAT_ARB:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * glGetTexImage for color index pixels.
+ */
+static void
+get_tex_color_index(struct gl_context *ctx, GLuint dimensions,
+ GLenum format, GLenum type, GLvoid *pixels,
+ const struct gl_texture_image *texImage)
+{
+ const GLint width = texImage->Width;
+ const GLint height = texImage->Height;
+ const GLint depth = texImage->Depth;
+ const GLuint indexBits =
+ _mesa_get_format_bits(texImage->TexFormat, GL_TEXTURE_INDEX_SIZE_EXT);
+ const GLbitfield transferOps = 0x0;
+ GLint img, row, col;
+
+ for (img = 0; img < depth; img++) {
+ for (row = 0; row < height; row++) {
+ GLuint indexRow[MAX_WIDTH] = { 0 };
+ void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
+ width, height, format, type,
+ img, row, 0);
+ assert(dest);
+
+ if (indexBits == 8) {
+ const GLubyte *src = (const GLubyte *) texImage->Data;
+ src += width * (img * texImage->Height + row);
+ for (col = 0; col < width; col++) {
+ indexRow[col] = src[col];
+ }
+ }
+ else if (indexBits == 16) {
+ const GLushort *src = (const GLushort *) texImage->Data;
+ src += width * (img * texImage->Height + row);
+ for (col = 0; col < width; col++) {
+ indexRow[col] = src[col];
+ }
+ }
+ else {
+ _mesa_problem(ctx, "Color index problem in _mesa_GetTexImage");
+ }
+ _mesa_pack_index_span(ctx, width, type, dest,
+ indexRow, &ctx->Pack, transferOps);
+ }
+ }
+}
+
+
+/**
+ * glGetTexImage for depth/Z pixels.
+ */
+static void
+get_tex_depth(struct gl_context *ctx, GLuint dimensions,
+ GLenum format, GLenum type, GLvoid *pixels,
+ const struct gl_texture_image *texImage)
+{
+ const GLint width = texImage->Width;
+ const GLint height = texImage->Height;
+ const GLint depth = texImage->Depth;
+ GLint img, row, col;
+ GLfloat *depthRow = (GLfloat *) malloc(width * sizeof(GLfloat));
+
+ if (!depthRow) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
+ return;
+ }
+
+ for (img = 0; img < depth; img++) {
+ for (row = 0; row < height; row++) {
+ void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
+ width, height, format, type,
+ img, row, 0);
+ assert(dest);
+
+ for (col = 0; col < width; col++) {
+ texImage->FetchTexelf(texImage, col, row, img, depthRow + col);
+ }
+ _mesa_pack_depth_span(ctx, width, dest, type, depthRow, &ctx->Pack);
+ }
+ }
+
+ free(depthRow);
+}
+
+
+/**
+ * glGetTexImage for depth/stencil pixels.
+ */
+static void
+get_tex_depth_stencil(struct gl_context *ctx, GLuint dimensions,
+ GLenum format, GLenum type, GLvoid *pixels,
+ const struct gl_texture_image *texImage)
+{
+ const GLint width = texImage->Width;
+ const GLint height = texImage->Height;
+ const GLint depth = texImage->Depth;
+ const GLuint *src = (const GLuint *) texImage->Data;
+ GLint img, row;
+
+ for (img = 0; img < depth; img++) {
+ for (row = 0; row < height; row++) {
+ void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
+ width, height, format, type,
+ img, row, 0);
+ memcpy(dest, src, width * sizeof(GLuint));
+ if (ctx->Pack.SwapBytes) {
+ _mesa_swap4((GLuint *) dest, width);
+ }
+
+ src += width * row + width * height * img;
+ }
+ }
+}
+
+
+/**
+ * glGetTexImage for YCbCr pixels.
+ */
+static void
+get_tex_ycbcr(struct gl_context *ctx, GLuint dimensions,
+ GLenum format, GLenum type, GLvoid *pixels,
+ const struct gl_texture_image *texImage)
+{
+ const GLint width = texImage->Width;
+ const GLint height = texImage->Height;
+ const GLint depth = texImage->Depth;
+ const GLint rowstride = texImage->RowStride;
+ const GLushort *src = (const GLushort *) texImage->Data;
+ GLint img, row;
+
+ for (img = 0; img < depth; img++) {
+ for (row = 0; row < height; row++) {
+ void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
+ width, height, format, type,
+ img, row, 0);
+ memcpy(dest, src, width * sizeof(GLushort));
+
+ /* check for byte swapping */
+ if ((texImage->TexFormat == MESA_FORMAT_YCBCR
+ && type == GL_UNSIGNED_SHORT_8_8_REV_MESA) ||
+ (texImage->TexFormat == MESA_FORMAT_YCBCR_REV
+ && type == GL_UNSIGNED_SHORT_8_8_MESA)) {
+ if (!ctx->Pack.SwapBytes)
+ _mesa_swap2((GLushort *) dest, width);
+ }
+ else if (ctx->Pack.SwapBytes) {
+ _mesa_swap2((GLushort *) dest, width);
+ }
+
+ src += rowstride;
+ }
+ }
+}
+
+
+#if FEATURE_EXT_texture_sRGB
+
+
+/**
+ * Convert a float value from linear space to a
+ * non-linear sRGB value in [0, 255].
+ * Not terribly efficient.
+ */
+static INLINE GLfloat
+linear_to_nonlinear(GLfloat cl)
+{
+ /* can't have values outside [0, 1] */
+ GLfloat cs;
+ if (cl < 0.0031308f) {
+ cs = 12.92f * cl;
+ }
+ else {
+ cs = (GLfloat)(1.055 * pow(cl, 0.41666) - 0.055);
+ }
+ return cs;
+}
+
+
+/**
+ * glGetTexImagefor sRGB pixels;
+ */
+static void
+get_tex_srgb(struct gl_context *ctx, GLuint dimensions,
+ GLenum format, GLenum type, GLvoid *pixels,
+ const struct gl_texture_image *texImage)
+{
+ const GLint width = texImage->Width;
+ const GLint height = texImage->Height;
+ const GLint depth = texImage->Depth;
+ const GLbitfield transferOps = 0x0;
+ GLint img, row;
+ GLfloat (*rgba)[4] = (GLfloat (*)[4]) malloc(4 * width * sizeof(GLfloat));
+
+ if (!rgba) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
+ return;
+ }
+
+ for (img = 0; img < depth; img++) {
+ for (row = 0; row < height; row++) {
+ void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
+ width, height, format, type,
+ img, row, 0);
+
+ GLint col;
+
+ /* convert row to RGBA format */
+ for (col = 0; col < width; col++) {
+ texImage->FetchTexelf(texImage, col, row, img, rgba[col]);
+ if (texImage->_BaseFormat == GL_LUMINANCE) {
+ rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]);
+ rgba[col][GCOMP] = 0.0;
+ rgba[col][BCOMP] = 0.0;
+ }
+ else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) {
+ rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]);
+ rgba[col][GCOMP] = 0.0;
+ rgba[col][BCOMP] = 0.0;
+ }
+ else if (texImage->_BaseFormat == GL_RGB ||
+ texImage->_BaseFormat == GL_RGBA) {
+ rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]);
+ rgba[col][GCOMP] = linear_to_nonlinear(rgba[col][GCOMP]);
+ rgba[col][BCOMP] = linear_to_nonlinear(rgba[col][BCOMP]);
+ }
+ }
+ _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba,
+ format, type, dest,
+ &ctx->Pack, transferOps);
+ }
+ }
+
+ free(rgba);
+}
+
+
+#else /* FEATURE_EXT_texture_sRGB */
+
+
+static INLINE void
+get_tex_srgb(struct gl_context *ctx, GLuint dimensions,
+ GLenum format, GLenum type, GLvoid *pixels,
+ const struct gl_texture_image *texImage)
+{
+ ASSERT_NO_FEATURE();
+}
+
+
+#endif /* FEATURE_EXT_texture_sRGB */
+
+
+/**
+ * glGetTexImagefor RGBA, Luminance, etc. pixels.
+ * This is the slow way since we use texture sampling.
+ */
+static void
+get_tex_rgba(struct gl_context *ctx, GLuint dimensions,
+ GLenum format, GLenum type, GLvoid *pixels,
+ const struct gl_texture_image *texImage)
+{
+ const GLint width = texImage->Width;
+ const GLint height = texImage->Height;
+ const GLint depth = texImage->Depth;
+ /* Normally, no pixel transfer ops are performed during glGetTexImage.
+ * The only possible exception is component clamping to [0,1].
+ */
+ GLbitfield transferOps = 0x0;
+ GLint img, row;
+ GLfloat (*rgba)[4] = (GLfloat (*)[4]) malloc(4 * width * sizeof(GLfloat));
+
+ if (!rgba) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
+ return;
+ }
+
+ for (img = 0; img < depth; img++) {
+ for (row = 0; row < height; row++) {
+ void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels,
+ width, height, format, type,
+ img, row, 0);
+ GLint col;
+ GLenum dataType = _mesa_get_format_datatype(texImage->TexFormat);
+
+ /* clamp does not apply to GetTexImage (final conversion)?
+ * Looks like we need clamp though when going from format
+ * containing negative values to unsigned format.
+ */
+ if (format == GL_LUMINANCE || format == GL_LUMINANCE_ALPHA) {
+ transferOps |= IMAGE_CLAMP_BIT;
+ }
+ else if (!type_with_negative_values(type) &&
+ (dataType == GL_FLOAT ||
+ dataType == GL_SIGNED_NORMALIZED)) {
+ transferOps |= IMAGE_CLAMP_BIT;
+ }
+
+ for (col = 0; col < width; col++) {
+ texImage->FetchTexelf(texImage, col, row, img, rgba[col]);
+ if (texImage->_BaseFormat == GL_ALPHA) {
+ rgba[col][RCOMP] = 0.0F;
+ rgba[col][GCOMP] = 0.0F;
+ rgba[col][BCOMP] = 0.0F;
+ }
+ else if (texImage->_BaseFormat == GL_LUMINANCE) {
+ rgba[col][GCOMP] = 0.0F;
+ rgba[col][BCOMP] = 0.0F;
+ rgba[col][ACOMP] = 1.0F;
+ }
+ else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) {
+ rgba[col][GCOMP] = 0.0F;
+ rgba[col][BCOMP] = 0.0F;
+ }
+ else if (texImage->_BaseFormat == GL_INTENSITY) {
+ rgba[col][GCOMP] = 0.0F;
+ rgba[col][BCOMP] = 0.0F;
+ rgba[col][ACOMP] = 1.0F;
+ }
+ }
+ _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba,
+ format, type, dest,
+ &ctx->Pack, transferOps);
+ }
+ }
+
+ free(rgba);
+}
+
+
+/**
+ * Try to do glGetTexImage() with simple memcpy().
+ * \return GL_TRUE if done, GL_FALSE otherwise
+ */
+static GLboolean
+get_tex_memcpy(struct gl_context *ctx, GLenum format, GLenum type, GLvoid *pixels,
+ const struct gl_texture_object *texObj,
+ const struct gl_texture_image *texImage)
+{
+ GLboolean memCopy = GL_FALSE;
+
+ /* Texture image should have been mapped already */
+ assert(texImage->Data);
+
+ /*
+ * Check if the src/dst formats are compatible.
+ * Also note that GL's pixel transfer ops don't apply to glGetTexImage()
+ * so we don't have to worry about those.
+ * XXX more format combinations could be supported here.
+ */
+ if ((texObj->Target == GL_TEXTURE_1D ||
+ texObj->Target == GL_TEXTURE_2D ||
+ texObj->Target == GL_TEXTURE_RECTANGLE ||
+ (texObj->Target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
+ texObj->Target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z))) {
+ if (texImage->TexFormat == MESA_FORMAT_ARGB8888 &&
+ format == GL_BGRA &&
+ type == GL_UNSIGNED_BYTE &&
+ !ctx->Pack.SwapBytes &&
+ _mesa_little_endian()) {
+ memCopy = GL_TRUE;
+ }
+ else if (texImage->TexFormat == MESA_FORMAT_AL88 &&
+ format == GL_LUMINANCE_ALPHA &&
+ type == GL_UNSIGNED_BYTE &&
+ !ctx->Pack.SwapBytes &&
+ _mesa_little_endian()) {
+ memCopy = GL_TRUE;
+ }
+ else if (texImage->TexFormat == MESA_FORMAT_L8 &&
+ format == GL_LUMINANCE &&
+ type == GL_UNSIGNED_BYTE) {
+ memCopy = GL_TRUE;
+ }
+ else if (texImage->TexFormat == MESA_FORMAT_L16 &&
+ format == GL_LUMINANCE &&
+ type == GL_UNSIGNED_SHORT) {
+ memCopy = GL_TRUE;
+ }
+ else if (texImage->TexFormat == MESA_FORMAT_A8 &&
+ format == GL_ALPHA &&
+ type == GL_UNSIGNED_BYTE) {
+ memCopy = GL_TRUE;
+ }
+ else if (texImage->TexFormat == MESA_FORMAT_A16 &&
+ format == GL_ALPHA &&
+ type == GL_UNSIGNED_SHORT) {
+ memCopy = GL_TRUE;
+ }
+ }
+
+ if (memCopy) {
+ const GLuint bpp = _mesa_get_format_bytes(texImage->TexFormat);
+ const GLuint bytesPerRow = texImage->Width * bpp;
+ GLubyte *dst =
+ _mesa_image_address2d(&ctx->Pack, pixels, texImage->Width,
+ texImage->Height, format, type, 0, 0);
+ const GLint dstRowStride =
+ _mesa_image_row_stride(&ctx->Pack, texImage->Width, format, type);
+ const GLubyte *src = texImage->Data;
+ const GLint srcRowStride = texImage->RowStride * bpp;
+ GLuint row;
+
+ if (bytesPerRow == dstRowStride && bytesPerRow == srcRowStride) {
+ memcpy(dst, src, bytesPerRow * texImage->Height);
+ }
+ else {
+ for (row = 0; row < texImage->Height; row++) {
+ memcpy(dst, src, bytesPerRow);
+ dst += dstRowStride;
+ src += srcRowStride;
+ }
+ }
+ }
+
+ return memCopy;
+}
+
+
+/**
+ * This is the software fallback for Driver.GetTexImage().
+ * All error checking will have been done before this routine is called.
+ * The texture image must be mapped.
+ */
+void
+_mesa_get_teximage(struct gl_context *ctx, GLenum target, GLint level,
+ GLenum format, GLenum type, GLvoid *pixels,
+ struct gl_texture_object *texObj,
+ struct gl_texture_image *texImage)
+{
+ GLuint dimensions;
+
+ /* If we get here, the texture image should be mapped */
+ assert(texImage->Data);
+
+ switch (target) {
+ case GL_TEXTURE_1D:
+ dimensions = 1;
+ break;
+ case GL_TEXTURE_3D:
+ dimensions = 3;
+ break;
+ default:
+ dimensions = 2;
+ }
+
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+ /* Packing texture image into a PBO.
+ * Map the (potentially) VRAM-based buffer into our process space so
+ * we can write into it with the code below.
+ * A hardware driver might use a sophisticated blit to move the
+ * texture data to the PBO if the PBO is in VRAM along with the texture.
+ */
+ GLubyte *buf = (GLubyte *)
+ ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+ GL_WRITE_ONLY_ARB, ctx->Pack.BufferObj);
+ if (!buf) {
+ /* out of memory or other unexpected error */
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage(map PBO failed)");
+ return;
+ }
+ /* <pixels> was an offset into the PBO.
+ * Now make it a real, client-side pointer inside the mapped region.
+ */
+ pixels = ADD_POINTERS(buf, pixels);
+ }
+
+ if (get_tex_memcpy(ctx, format, type, pixels, texObj, texImage)) {
+ /* all done */
+ }
+ else if (format == GL_COLOR_INDEX) {
+ get_tex_color_index(ctx, dimensions, format, type, pixels, texImage);
+ }
+ else if (format == GL_DEPTH_COMPONENT) {
+ get_tex_depth(ctx, dimensions, format, type, pixels, texImage);
+ }
+ else if (format == GL_DEPTH_STENCIL_EXT) {
+ get_tex_depth_stencil(ctx, dimensions, format, type, pixels, texImage);
+ }
+ else if (format == GL_YCBCR_MESA) {
+ get_tex_ycbcr(ctx, dimensions, format, type, pixels, texImage);
+ }
+ else if (_mesa_get_format_color_encoding(texImage->TexFormat) == GL_SRGB) {
+ get_tex_srgb(ctx, dimensions, format, type, pixels, texImage);
+ }
+ else {
+ get_tex_rgba(ctx, dimensions, format, type, pixels, texImage);
+ }
+
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+ ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+ ctx->Pack.BufferObj);
+ }
+}
+
+
+
+/**
+ * This is the software fallback for Driver.GetCompressedTexImage().
+ * All error checking will have been done before this routine is called.
+ */
+void
+_mesa_get_compressed_teximage(struct gl_context *ctx, GLenum target, GLint level,
+ GLvoid *img,
+ struct gl_texture_object *texObj,
+ struct gl_texture_image *texImage)
+{
+ const GLuint row_stride = _mesa_format_row_stride(texImage->TexFormat,
+ texImage->Width);
+ const GLuint row_stride_stored = _mesa_format_row_stride(texImage->TexFormat,
+ texImage->RowStride);
+ GLuint i;
+
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+ /* pack texture image into a PBO */
+ GLubyte *buf = (GLubyte *)
+ ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+ GL_WRITE_ONLY_ARB, ctx->Pack.BufferObj);
+ if (!buf) {
+ /* out of memory or other unexpected error */
+ _mesa_error(ctx, GL_OUT_OF_MEMORY,
+ "glGetCompresssedTexImage(map PBO failed)");
+ return;
+ }
+ img = ADD_POINTERS(buf, img);
+ }
+
+ /* no pixelstore or pixel transfer, but respect stride */
+
+ if (row_stride == row_stride_stored) {
+ const GLuint size = _mesa_format_image_size(texImage->TexFormat,
+ texImage->Width,
+ texImage->Height,
+ texImage->Depth);
+ memcpy(img, texImage->Data, size);
+ }
+ else {
+ GLuint bw, bh;
+ _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh);
+ for (i = 0; i < (texImage->Height + bh - 1) / bh; i++) {
+ memcpy((GLubyte *)img + i * row_stride,
+ (GLubyte *)texImage->Data + i * row_stride_stored,
+ row_stride);
+ }
+ }
+
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+ ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+ ctx->Pack.BufferObj);
+ }
+}
+
+
+
+/**
+ * Do error checking for a glGetTexImage() call.
+ * \return GL_TRUE if any error, GL_FALSE if no errors.
+ */
+static GLboolean
+getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,
+ GLenum format, GLenum type, GLvoid *pixels )
+{
+ struct gl_texture_object *texObj;
+ struct gl_texture_image *texImage;
+ const GLint maxLevels = _mesa_max_texture_levels(ctx, target);
+ GLenum baseFormat;
+
+ if (maxLevels == 0) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target=0x%x)", target);
+ return GL_TRUE;
+ }
+
+ if (level < 0 || level >= maxLevels) {
+ _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" );
+ return GL_TRUE;
+ }
+
+ if (_mesa_sizeof_packed_type(type) <= 0) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(type)" );
+ return GL_TRUE;
+ }
+
+ if (_mesa_components_in_format(format) <= 0 ||
+ format == GL_STENCIL_INDEX) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexImage(format)" );
+ return GL_TRUE;
+ }
+
+ if (!ctx->Extensions.EXT_paletted_texture && _mesa_is_index_format(format)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+ return GL_TRUE;
+ }
+
+ if (!ctx->Extensions.ARB_depth_texture && _mesa_is_depth_format(format)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+ return GL_TRUE;
+ }
+
+ if (!ctx->Extensions.MESA_ycbcr_texture && _mesa_is_ycbcr_format(format)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+ return GL_TRUE;
+ }
+
+ if (!ctx->Extensions.EXT_packed_depth_stencil
+ && _mesa_is_depthstencil_format(format)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+ return GL_TRUE;
+ }
+
+ if (!ctx->Extensions.ATI_envmap_bumpmap
+ && _mesa_is_dudv_format(format)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format)");
+ return GL_TRUE;
+ }
+
+ texObj = _mesa_get_current_tex_object(ctx, target);
+
+ if (!texObj || _mesa_is_proxy_texture(target)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target)");
+ return GL_TRUE;
+ }
+
+ texImage = _mesa_select_tex_image(ctx, texObj, target, level);
+ if (!texImage) {
+ /* out of memory */
+ return GL_TRUE;
+ }
+
+ baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
+
+ /* Make sure the requested image format is compatible with the
+ * texture's format. Note that a color index texture can be converted
+ * to RGBA so that combo is allowed.
+ */
+ if (_mesa_is_color_format(format)
+ && !_mesa_is_color_format(baseFormat)
+ && !_mesa_is_index_format(baseFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+ return GL_TRUE;
+ }
+ else if (_mesa_is_index_format(format)
+ && !_mesa_is_index_format(baseFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+ return GL_TRUE;
+ }
+ else if (_mesa_is_depth_format(format)
+ && !_mesa_is_depth_format(baseFormat)
+ && !_mesa_is_depthstencil_format(baseFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+ return GL_TRUE;
+ }
+ else if (_mesa_is_ycbcr_format(format)
+ && !_mesa_is_ycbcr_format(baseFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+ return GL_TRUE;
+ }
+ else if (_mesa_is_depthstencil_format(format)
+ && !_mesa_is_depthstencil_format(baseFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+ return GL_TRUE;
+ }
+ else if (_mesa_is_dudv_format(format)
+ && !_mesa_is_dudv_format(baseFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+ return GL_TRUE;
+ }
+
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+ /* packing texture image into a PBO */
+ const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
+ if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width,
+ texImage->Height, texImage->Depth,
+ format, type, pixels)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetTexImage(out of bounds PBO write)");
+ return GL_TRUE;
+ }
+
+ /* PBO should not be mapped */
+ if (_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetTexImage(PBO is mapped)");
+ return GL_TRUE;
+ }
+ }
+
+ return GL_FALSE;
+}
+
+
+
+/**
+ * Get texture image. Called by glGetTexImage.
+ *
+ * \param target texture target.
+ * \param level image level.
+ * \param format pixel data format for returned image.
+ * \param type pixel data type for returned image.
+ * \param pixels returned pixel data.
+ */
+void GLAPIENTRY
+_mesa_GetTexImage( GLenum target, GLint level, GLenum format,
+ GLenum type, GLvoid *pixels )
+{
+ struct gl_texture_object *texObj;
+ struct gl_texture_image *texImage;
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+ if (getteximage_error_check(ctx, target, level, format, type, pixels)) {
+ return;
+ }
+
+ if (!_mesa_is_bufferobj(ctx->Pack.BufferObj) && !pixels) {
+ /* not an error, do nothing */
+ return;
+ }
+
+ texObj = _mesa_get_current_tex_object(ctx, target);
+ texImage = _mesa_select_tex_image(ctx, texObj, target, level);
+
+ if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {
+ _mesa_debug(ctx, "glGetTexImage(tex %u) format = %s, w=%d, h=%d,"
+ " dstFmt=0x%x, dstType=0x%x\n",
+ texObj->Name,
+ _mesa_get_format_name(texImage->TexFormat),
+ texImage->Width, texImage->Height,
+ format, type);
+ }
+
+ _mesa_lock_texture(ctx, texObj);
+ {
+ ctx->Driver.GetTexImage(ctx, target, level, format, type, pixels,
+ texObj, texImage);
+ }
+ _mesa_unlock_texture(ctx, texObj);
+}
+
+
+
+/**
+ * Do error checking for a glGetCompressedTexImage() call.
+ * \return GL_TRUE if any error, GL_FALSE if no errors.
+ */
+static GLboolean
+getcompressedteximage_error_check(struct gl_context *ctx, GLenum target,
+ GLint level, GLvoid *img)
+{
+ struct gl_texture_object *texObj;
+ struct gl_texture_image *texImage;
+ const GLint maxLevels = _mesa_max_texture_levels(ctx, target);
+
+ if (maxLevels == 0) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImage(target=0x%x)",
+ target);
+ return GL_TRUE;
+ }
+
+ if (level < 0 || level >= maxLevels) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glGetCompressedTexImageARB(bad level = %d)", level);
+ return GL_TRUE;
+ }
+
+ if (_mesa_is_proxy_texture(target)) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetCompressedTexImageARB(bad target = %s)",
+ _mesa_lookup_enum_by_nr(target));
+ return GL_TRUE;
+ }
+
+ texObj = _mesa_get_current_tex_object(ctx, target);
+ if (!texObj) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImageARB(target)");
+ return GL_TRUE;
+ }
+
+ texImage = _mesa_select_tex_image(ctx, texObj, target, level);
+
+ if (!texImage) {
+ /* probably invalid mipmap level */
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glGetCompressedTexImageARB(level)");
+ return GL_TRUE;
+ }
+
+ if (!_mesa_is_format_compressed(texImage->TexFormat)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetCompressedTexImageARB(texture is not compressed)");
+ return GL_TRUE;
+ }
+
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+ GLuint compressedSize;
+
+ /* make sure PBO is not mapped */
+ if (_mesa_bufferobj_mapped(ctx->Pack.BufferObj)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetCompressedTexImage(PBO is mapped)");
+ return GL_TRUE;
+ }
+
+ compressedSize = _mesa_format_image_size(texImage->TexFormat,
+ texImage->Width,
+ texImage->Height,
+ texImage->Depth);
+
+ /* do bounds checking on PBO write */
+ if ((const GLubyte *) img + compressedSize >
+ (const GLubyte *) ctx->Pack.BufferObj->Size) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetCompressedTexImage(out of bounds PBO write)");
+ return GL_TRUE;
+ }
+ }
+
+ return GL_FALSE;
+}
+
+
+void GLAPIENTRY
+_mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img)
+{
+ struct gl_texture_object *texObj;
+ struct gl_texture_image *texImage;
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+ if (getcompressedteximage_error_check(ctx, target, level, img)) {
+ return;
+ }
+
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj) && !img) {
+ /* not an error, do nothing */
+ return;
+ }
+
+ texObj = _mesa_get_current_tex_object(ctx, target);
+ texImage = _mesa_select_tex_image(ctx, texObj, target, level);
+
+ if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {
+ _mesa_debug(ctx,
+ "glGetCompressedTexImage(tex %u) format = %s, w=%d, h=%d\n",
+ texObj->Name,
+ _mesa_get_format_name(texImage->TexFormat),
+ texImage->Width, texImage->Height);
+ }
+
+ _mesa_lock_texture(ctx, texObj);
+ {
+ ctx->Driver.GetCompressedTexImage(ctx, target, level, img,
+ texObj, texImage);
+ }
+ _mesa_unlock_texture(ctx, texObj);
+}
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