| /* |
| * 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 "format_unpack.h" |
| #include "glformats.h" |
| #include "image.h" |
| #include "mfeatures.h" |
| #include "mtypes.h" |
| #include "pack.h" |
| #include "pbo.h" |
| #include "texcompress.h" |
| #include "texgetimage.h" |
| #include "teximage.h" |
| |
| |
| |
| /** |
| * Can the given type represent negative values? |
| */ |
| static inline GLboolean |
| type_needs_clamping(GLenum type) |
| { |
| switch (type) { |
| case GL_BYTE: |
| case GL_SHORT: |
| case GL_INT: |
| case GL_FLOAT: |
| case GL_HALF_FLOAT_ARB: |
| case GL_UNSIGNED_INT_10F_11F_11F_REV: |
| case GL_UNSIGNED_INT_5_9_9_9_REV: |
| return GL_FALSE; |
| default: |
| return GL_TRUE; |
| } |
| } |
| |
| |
| /** |
| * glGetTexImage for depth/Z pixels. |
| */ |
| static void |
| get_tex_depth(struct gl_context *ctx, GLuint dimensions, |
| GLenum format, GLenum type, GLvoid *pixels, |
| struct gl_texture_image *texImage) |
| { |
| const GLint width = texImage->Width; |
| const GLint height = texImage->Height; |
| const GLint depth = texImage->Depth; |
| GLint img, row; |
| GLfloat *depthRow = (GLfloat *) malloc(width * sizeof(GLfloat)); |
| |
| if (!depthRow) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); |
| return; |
| } |
| |
| for (img = 0; img < depth; img++) { |
| GLubyte *srcMap; |
| GLint srcRowStride; |
| |
| /* map src texture buffer */ |
| ctx->Driver.MapTextureImage(ctx, texImage, img, |
| 0, 0, width, height, GL_MAP_READ_BIT, |
| &srcMap, &srcRowStride); |
| |
| if (srcMap) { |
| for (row = 0; row < height; row++) { |
| void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, |
| width, height, format, type, |
| img, row, 0); |
| const GLubyte *src = srcMap + row * srcRowStride; |
| _mesa_unpack_float_z_row(texImage->TexFormat, width, src, depthRow); |
| _mesa_pack_depth_span(ctx, width, dest, type, depthRow, &ctx->Pack); |
| } |
| |
| ctx->Driver.UnmapTextureImage(ctx, texImage, img); |
| } |
| else { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); |
| break; |
| } |
| } |
| |
| 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, |
| struct gl_texture_image *texImage) |
| { |
| const GLint width = texImage->Width; |
| const GLint height = texImage->Height; |
| const GLint depth = texImage->Depth; |
| GLint img, row; |
| |
| for (img = 0; img < depth; img++) { |
| GLubyte *srcMap; |
| GLint rowstride; |
| |
| /* map src texture buffer */ |
| ctx->Driver.MapTextureImage(ctx, texImage, img, |
| 0, 0, width, height, GL_MAP_READ_BIT, |
| &srcMap, &rowstride); |
| |
| if (srcMap) { |
| for (row = 0; row < height; row++) { |
| const GLubyte *src = srcMap + row * rowstride; |
| void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, |
| width, height, format, type, |
| img, row, 0); |
| /* XXX Z24_S8 vs. S8_Z24??? */ |
| memcpy(dest, src, width * sizeof(GLuint)); |
| if (ctx->Pack.SwapBytes) { |
| _mesa_swap4((GLuint *) dest, width); |
| } |
| } |
| |
| ctx->Driver.UnmapTextureImage(ctx, texImage, img); |
| } |
| else { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); |
| break; |
| } |
| } |
| } |
| |
| |
| /** |
| * glGetTexImage for YCbCr pixels. |
| */ |
| static void |
| get_tex_ycbcr(struct gl_context *ctx, GLuint dimensions, |
| GLenum format, GLenum type, GLvoid *pixels, |
| struct gl_texture_image *texImage) |
| { |
| const GLint width = texImage->Width; |
| const GLint height = texImage->Height; |
| const GLint depth = texImage->Depth; |
| GLint img, row; |
| |
| for (img = 0; img < depth; img++) { |
| GLubyte *srcMap; |
| GLint rowstride; |
| |
| /* map src texture buffer */ |
| ctx->Driver.MapTextureImage(ctx, texImage, img, |
| 0, 0, width, height, GL_MAP_READ_BIT, |
| &srcMap, &rowstride); |
| |
| if (srcMap) { |
| for (row = 0; row < height; row++) { |
| const GLubyte *src = srcMap + row * rowstride; |
| 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); |
| } |
| } |
| |
| ctx->Driver.UnmapTextureImage(ctx, texImage, img); |
| } |
| else { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); |
| break; |
| } |
| } |
| } |
| |
| |
| /** |
| * Get a color texture image with decompression. |
| */ |
| static void |
| get_tex_rgba_compressed(struct gl_context *ctx, GLuint dimensions, |
| GLenum format, GLenum type, GLvoid *pixels, |
| struct gl_texture_image *texImage, |
| GLbitfield transferOps) |
| { |
| /* don't want to apply sRGB -> RGB conversion here so override the format */ |
| const gl_format texFormat = |
| _mesa_get_srgb_format_linear(texImage->TexFormat); |
| const GLenum baseFormat = _mesa_get_format_base_format(texFormat); |
| const GLenum destBaseFormat = _mesa_base_tex_format(ctx, format); |
| GLenum rebaseFormat = GL_NONE; |
| const GLuint width = texImage->Width; |
| const GLuint height = texImage->Height; |
| const GLuint depth = texImage->Depth; |
| GLfloat *tempImage, *srcRow; |
| GLuint row; |
| |
| /* Decompress into temp float buffer, then pack into user buffer */ |
| tempImage = (GLfloat *) malloc(width * height * depth |
| * 4 * sizeof(GLfloat)); |
| if (!tempImage) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()"); |
| return; |
| } |
| |
| /* Decompress the texture image - results in 'tempImage' */ |
| { |
| GLubyte *srcMap; |
| GLint srcRowStride; |
| |
| ctx->Driver.MapTextureImage(ctx, texImage, 0, |
| 0, 0, width, height, |
| GL_MAP_READ_BIT, |
| &srcMap, &srcRowStride); |
| if (srcMap) { |
| _mesa_decompress_image(texFormat, width, height, |
| srcMap, srcRowStride, tempImage); |
| |
| ctx->Driver.UnmapTextureImage(ctx, texImage, 0); |
| } |
| else { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); |
| free(tempImage); |
| return; |
| } |
| } |
| |
| if (baseFormat == GL_LUMINANCE || |
| baseFormat == GL_INTENSITY || |
| baseFormat == GL_LUMINANCE_ALPHA) { |
| /* If a luminance (or intensity) texture is read back as RGB(A), the |
| * returned value should be (L,0,0,1), not (L,L,L,1). Set rebaseFormat |
| * here to get G=B=0. |
| */ |
| rebaseFormat = texImage->_BaseFormat; |
| } |
| else if ((baseFormat == GL_RGBA || |
| baseFormat == GL_RGB || |
| baseFormat == GL_RG) && |
| (destBaseFormat == GL_LUMINANCE || |
| destBaseFormat == GL_LUMINANCE_ALPHA || |
| destBaseFormat == GL_LUMINANCE_INTEGER_EXT || |
| destBaseFormat == GL_LUMINANCE_ALPHA_INTEGER_EXT)) { |
| /* If we're reading back an RGB(A) texture as luminance then we need |
| * to return L=tex(R). Note, that's different from glReadPixels which |
| * returns L=R+G+B. |
| */ |
| rebaseFormat = GL_LUMINANCE_ALPHA; /* this covers GL_LUMINANCE too */ |
| } |
| |
| if (rebaseFormat) { |
| _mesa_rebase_rgba_float(width * height, (GLfloat (*)[4]) tempImage, |
| rebaseFormat); |
| } |
| |
| srcRow = tempImage; |
| for (row = 0; row < height; row++) { |
| void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, |
| width, height, format, type, |
| 0, row, 0); |
| |
| _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) srcRow, |
| format, type, dest, &ctx->Pack, transferOps); |
| srcRow += width * 4; |
| } |
| |
| free(tempImage); |
| } |
| |
| |
| /** |
| * Get an uncompressed color texture image. |
| */ |
| static void |
| get_tex_rgba_uncompressed(struct gl_context *ctx, GLuint dimensions, |
| GLenum format, GLenum type, GLvoid *pixels, |
| struct gl_texture_image *texImage, |
| GLbitfield transferOps) |
| { |
| /* don't want to apply sRGB -> RGB conversion here so override the format */ |
| const gl_format texFormat = |
| _mesa_get_srgb_format_linear(texImage->TexFormat); |
| const GLuint width = texImage->Width; |
| const GLenum destBaseFormat = _mesa_base_tex_format(ctx, format); |
| GLenum rebaseFormat = GL_NONE; |
| GLuint height = texImage->Height; |
| GLuint depth = texImage->Depth; |
| GLuint img, row; |
| GLfloat (*rgba)[4]; |
| GLuint (*rgba_uint)[4]; |
| GLboolean tex_is_integer = _mesa_is_format_integer_color(texImage->TexFormat); |
| GLboolean tex_is_uint = _mesa_is_format_unsigned(texImage->TexFormat); |
| |
| /* Allocate buffer for one row of texels */ |
| rgba = (GLfloat (*)[4]) malloc(4 * width * sizeof(GLfloat)); |
| rgba_uint = (GLuint (*)[4]) rgba; |
| if (!rgba) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()"); |
| return; |
| } |
| |
| if (texImage->TexObject->Target == GL_TEXTURE_1D_ARRAY) { |
| depth = height; |
| height = 1; |
| } |
| |
| if (texImage->_BaseFormat == GL_LUMINANCE || |
| texImage->_BaseFormat == GL_INTENSITY || |
| texImage->_BaseFormat == GL_LUMINANCE_ALPHA) { |
| /* If a luminance (or intensity) texture is read back as RGB(A), the |
| * returned value should be (L,0,0,1), not (L,L,L,1). Set rebaseFormat |
| * here to get G=B=0. |
| */ |
| rebaseFormat = texImage->_BaseFormat; |
| } |
| else if ((texImage->_BaseFormat == GL_RGBA || |
| texImage->_BaseFormat == GL_RGB || |
| texImage->_BaseFormat == GL_RG) && |
| (destBaseFormat == GL_LUMINANCE || |
| destBaseFormat == GL_LUMINANCE_ALPHA || |
| destBaseFormat == GL_LUMINANCE_INTEGER_EXT || |
| destBaseFormat == GL_LUMINANCE_ALPHA_INTEGER_EXT)) { |
| /* If we're reading back an RGB(A) texture as luminance then we need |
| * to return L=tex(R). Note, that's different from glReadPixels which |
| * returns L=R+G+B. |
| */ |
| rebaseFormat = GL_LUMINANCE_ALPHA; /* this covers GL_LUMINANCE too */ |
| } |
| |
| for (img = 0; img < depth; img++) { |
| GLubyte *srcMap; |
| GLint rowstride; |
| |
| /* map src texture buffer */ |
| ctx->Driver.MapTextureImage(ctx, texImage, img, |
| 0, 0, width, height, GL_MAP_READ_BIT, |
| &srcMap, &rowstride); |
| if (srcMap) { |
| for (row = 0; row < height; row++) { |
| const GLubyte *src = srcMap + row * rowstride; |
| void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, |
| width, height, format, type, |
| img, row, 0); |
| |
| if (tex_is_integer) { |
| _mesa_unpack_uint_rgba_row(texFormat, width, src, rgba_uint); |
| if (rebaseFormat) |
| _mesa_rebase_rgba_uint(width, rgba_uint, rebaseFormat); |
| if (tex_is_uint) { |
| _mesa_pack_rgba_span_from_uints(ctx, width, |
| (GLuint (*)[4]) rgba_uint, |
| format, type, dest); |
| } else { |
| _mesa_pack_rgba_span_from_ints(ctx, width, |
| (GLint (*)[4]) rgba_uint, |
| format, type, dest); |
| } |
| } else { |
| _mesa_unpack_rgba_row(texFormat, width, src, rgba); |
| if (rebaseFormat) |
| _mesa_rebase_rgba_float(width, rgba, rebaseFormat); |
| _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba, |
| format, type, dest, |
| &ctx->Pack, transferOps); |
| } |
| } |
| |
| /* Unmap the src texture buffer */ |
| ctx->Driver.UnmapTextureImage(ctx, texImage, img); |
| } |
| else { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); |
| break; |
| } |
| } |
| |
| free(rgba); |
| } |
| |
| |
| /** |
| * glGetTexImage for color formats (RGBA, RGB, alpha, LA, etc). |
| * Compressed textures are handled here as well. |
| */ |
| static void |
| get_tex_rgba(struct gl_context *ctx, GLuint dimensions, |
| GLenum format, GLenum type, GLvoid *pixels, |
| struct gl_texture_image *texImage) |
| { |
| const GLenum dataType = _mesa_get_format_datatype(texImage->TexFormat); |
| GLbitfield transferOps = 0x0; |
| |
| /* In general, clamping does not apply to glGetTexImage, except when |
| * the returned type of the image can't hold negative values. |
| */ |
| if (type_needs_clamping(type)) { |
| /* the returned image type can't have negative values */ |
| if (dataType == GL_FLOAT || |
| dataType == GL_SIGNED_NORMALIZED || |
| format == GL_LUMINANCE || |
| format == GL_LUMINANCE_ALPHA) { |
| transferOps |= IMAGE_CLAMP_BIT; |
| } |
| } |
| |
| if (_mesa_is_format_compressed(texImage->TexFormat)) { |
| get_tex_rgba_compressed(ctx, dimensions, format, type, |
| pixels, texImage, transferOps); |
| } |
| else { |
| get_tex_rgba_uncompressed(ctx, dimensions, format, type, |
| pixels, texImage, transferOps); |
| } |
| } |
| |
| |
| /** |
| * 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, |
| struct gl_texture_image *texImage) |
| { |
| const GLenum target = texImage->TexObject->Target; |
| GLboolean memCopy = GL_FALSE; |
| |
| /* |
| * Check if we can use memcpy to copy from the hardware texture |
| * format to the user's format/type. |
| * Note that GL's pixel transfer ops don't apply to glGetTexImage() |
| */ |
| if (target == GL_TEXTURE_1D || |
| target == GL_TEXTURE_2D || |
| target == GL_TEXTURE_RECTANGLE || |
| _mesa_is_cube_face(target)) { |
| memCopy = _mesa_format_matches_format_and_type(texImage->TexFormat, |
| format, type, |
| ctx->Pack.SwapBytes); |
| } |
| |
| 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); |
| GLubyte *src; |
| GLint srcRowStride; |
| |
| /* map src texture buffer */ |
| ctx->Driver.MapTextureImage(ctx, texImage, 0, |
| 0, 0, texImage->Width, texImage->Height, |
| GL_MAP_READ_BIT, &src, &srcRowStride); |
| |
| if (src) { |
| if (bytesPerRow == dstRowStride && bytesPerRow == srcRowStride) { |
| memcpy(dst, src, bytesPerRow * texImage->Height); |
| } |
| else { |
| GLuint row; |
| for (row = 0; row < texImage->Height; row++) { |
| memcpy(dst, src, bytesPerRow); |
| dst += dstRowStride; |
| src += srcRowStride; |
| } |
| } |
| |
| /* unmap src texture buffer */ |
| ctx->Driver.UnmapTextureImage(ctx, texImage, 0); |
| } |
| else { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); |
| } |
| } |
| |
| return memCopy; |
| } |
| |
| |
| /** |
| * This is the software fallback for Driver.GetTexImage(). |
| * All error checking will have been done before this routine is called. |
| * We'll call ctx->Driver.MapTextureImage() to access the data, then |
| * unmap with ctx->Driver.UnmapTextureImage(). |
| */ |
| void |
| _mesa_get_teximage(struct gl_context *ctx, |
| GLenum format, GLenum type, GLvoid *pixels, |
| struct gl_texture_image *texImage) |
| { |
| GLuint dimensions; |
| |
| switch (texImage->TexObject->Target) { |
| case GL_TEXTURE_1D: |
| dimensions = 1; |
| break; |
| case GL_TEXTURE_3D: |
| dimensions = 3; |
| break; |
| default: |
| dimensions = 2; |
| } |
| |
| /* map dest buffer, if PBO */ |
| 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.MapBufferRange(ctx, 0, ctx->Pack.BufferObj->Size, |
| GL_MAP_WRITE_BIT, 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, texImage)) { |
| /* all done */ |
| } |
| 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 { |
| get_tex_rgba(ctx, dimensions, format, type, pixels, texImage); |
| } |
| |
| if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { |
| ctx->Driver.UnmapBuffer(ctx, 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, |
| struct gl_texture_image *texImage, |
| GLvoid *img) |
| { |
| const GLuint row_stride = |
| _mesa_format_row_stride(texImage->TexFormat, texImage->Width); |
| GLuint i; |
| GLubyte *src; |
| GLint srcRowStride; |
| |
| if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { |
| /* pack texture image into a PBO */ |
| GLubyte *buf = (GLubyte *) |
| ctx->Driver.MapBufferRange(ctx, 0, ctx->Pack.BufferObj->Size, |
| GL_MAP_WRITE_BIT, 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); |
| } |
| |
| /* map src texture buffer */ |
| ctx->Driver.MapTextureImage(ctx, texImage, 0, |
| 0, 0, texImage->Width, texImage->Height, |
| GL_MAP_READ_BIT, &src, &srcRowStride); |
| |
| if (src) { |
| /* no pixelstore or pixel transfer, but respect stride */ |
| |
| if (row_stride == srcRowStride) { |
| const GLuint size = _mesa_format_image_size(texImage->TexFormat, |
| texImage->Width, |
| texImage->Height, |
| texImage->Depth); |
| memcpy(img, src, 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 *)src + i * srcRowStride, |
| row_stride); |
| } |
| } |
| |
| ctx->Driver.UnmapTextureImage(ctx, texImage, 0); |
| } |
| else { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetCompresssedTexImage"); |
| } |
| |
| if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { |
| ctx->Driver.UnmapBuffer(ctx, ctx->Pack.BufferObj); |
| } |
| } |
| |
| |
| /** |
| * Validate the texture target enum supplied to glTexImage or |
| * glCompressedTexImage. |
| */ |
| static GLboolean |
| legal_getteximage_target(struct gl_context *ctx, GLenum target) |
| { |
| switch (target) { |
| case GL_TEXTURE_1D: |
| case GL_TEXTURE_2D: |
| case GL_TEXTURE_3D: |
| return GL_TRUE; |
| case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB: |
| case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB: |
| case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB: |
| case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB: |
| case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB: |
| case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB: |
| return ctx->Extensions.ARB_texture_cube_map; |
| case GL_TEXTURE_RECTANGLE_NV: |
| return ctx->Extensions.NV_texture_rectangle; |
| case GL_TEXTURE_1D_ARRAY_EXT: |
| case GL_TEXTURE_2D_ARRAY_EXT: |
| return (ctx->Extensions.MESA_texture_array || |
| ctx->Extensions.EXT_texture_array); |
| default: |
| return GL_FALSE; |
| } |
| } |
| |
| |
| /** |
| * 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, GLsizei clientMemSize, |
| GLvoid *pixels ) |
| { |
| struct gl_texture_object *texObj; |
| struct gl_texture_image *texImage; |
| const GLint maxLevels = _mesa_max_texture_levels(ctx, target); |
| const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2; |
| GLenum baseFormat, err; |
| |
| if (!legal_getteximage_target(ctx, target)) { |
| _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target=0x%x)", target); |
| return GL_TRUE; |
| } |
| |
| assert(maxLevels != 0); |
| if (level < 0 || level >= maxLevels) { |
| _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexImage(level)" ); |
| return GL_TRUE; |
| } |
| |
| err = _mesa_error_check_format_and_type(ctx, format, type); |
| if (err != GL_NO_ERROR) { |
| _mesa_error(ctx, err, "glGetTexImage(format/type)"); |
| return GL_TRUE; |
| } |
| |
| texObj = _mesa_get_current_tex_object(ctx, target); |
| |
| if (!texObj) { |
| _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(target)"); |
| return GL_TRUE; |
| } |
| |
| texImage = _mesa_select_tex_image(ctx, texObj, target, level); |
| if (!texImage) { |
| /* non-existant texture image */ |
| return GL_TRUE; |
| } |
| |
| baseFormat = _mesa_get_format_base_format(texImage->TexFormat); |
| |
| /* Make sure the requested image format is compatible with the |
| * texture's format. |
| */ |
| if (_mesa_is_color_format(format) |
| && !_mesa_is_color_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_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width, |
| texImage->Height, texImage->Depth, |
| format, type, clientMemSize, pixels)) { |
| if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glGetTexImage(out of bounds PBO access)"); |
| } else { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glGetnTexImageARB(out of bounds access:" |
| " bufSize (%d) is too small)", clientMemSize); |
| } |
| return GL_TRUE; |
| } |
| |
| if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { |
| /* 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 bufSize size of the pixels data buffer. |
| * \param pixels returned pixel data. |
| */ |
| void GLAPIENTRY |
| _mesa_GetnTexImageARB( GLenum target, GLint level, GLenum format, |
| GLenum type, GLsizei bufSize, 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, |
| bufSize, 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_is_zero_size_texture(texImage)) |
| return; |
| |
| 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, format, type, pixels, texImage); |
| } |
| _mesa_unlock_texture(ctx, texObj); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_GetTexImage( GLenum target, GLint level, GLenum format, |
| GLenum type, GLvoid *pixels ) |
| { |
| _mesa_GetnTexImageARB(target, level, format, type, INT_MAX, pixels); |
| } |
| |
| |
| /** |
| * 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, GLsizei clientMemSize, GLvoid *img) |
| { |
| struct gl_texture_object *texObj; |
| struct gl_texture_image *texImage; |
| const GLint maxLevels = _mesa_max_texture_levels(ctx, target); |
| GLuint compressedSize; |
| |
| if (!legal_getteximage_target(ctx, target)) { |
| _mesa_error(ctx, GL_INVALID_ENUM, "glGetCompressedTexImage(target=0x%x)", |
| target); |
| return GL_TRUE; |
| } |
| |
| assert(maxLevels != 0); |
| if (level < 0 || level >= maxLevels) { |
| _mesa_error(ctx, GL_INVALID_VALUE, |
| "glGetCompressedTexImageARB(bad level = %d)", level); |
| 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; |
| } |
| |
| compressedSize = _mesa_format_image_size(texImage->TexFormat, |
| texImage->Width, |
| texImage->Height, |
| texImage->Depth); |
| |
| if (!_mesa_is_bufferobj(ctx->Pack.BufferObj)) { |
| /* do bounds checking on writing to client memory */ |
| if (clientMemSize < compressedSize) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glGetnCompressedTexImageARB(out of bounds access:" |
| " bufSize (%d) is too small)", clientMemSize); |
| return GL_TRUE; |
| } |
| } else { |
| /* 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 access)"); |
| return GL_TRUE; |
| } |
| |
| /* 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; |
| } |
| } |
| |
| return GL_FALSE; |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_GetnCompressedTexImageARB(GLenum target, GLint level, GLsizei bufSize, |
| 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, bufSize, 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_is_zero_size_texture(texImage)) |
| return; |
| |
| 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, texImage, img); |
| } |
| _mesa_unlock_texture(ctx, texObj); |
| } |
| |
| void GLAPIENTRY |
| _mesa_GetCompressedTexImageARB(GLenum target, GLint level, GLvoid *img) |
| { |
| _mesa_GetnCompressedTexImageARB(target, level, INT_MAX, img); |
| } |
