/* * Mesa 3-D graphics library * * 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 * THE AUTHORS OR COPYRIGHT HOLDERS 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 "mtypes.h" #include "pack.h" #include "pbo.h" #include "pixelstore.h" #include "texcompress.h" #include "texgetimage.h" #include "teximage.h" #include "texobj.h" #include "texstore.h" #include "format_utils.h" #include "pixeltransfer.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, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLint depth, GLenum format, GLenum type, GLvoid *pixels, struct gl_texture_image *texImage) { GLint img, row; GLfloat *depthRow = 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, zoffset + img, xoffset, yoffset, 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, zoffset + 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, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLint depth, GLenum format, GLenum type, GLvoid *pixels, struct gl_texture_image *texImage) { GLint img, row; assert(format == GL_DEPTH_STENCIL); for (img = 0; img < depth; img++) { GLubyte *srcMap; GLint rowstride; /* map src texture buffer */ ctx->Driver.MapTextureImage(ctx, texImage, zoffset + img, xoffset, yoffset, 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); switch (type) { case GL_UNSIGNED_INT_24_8: _mesa_unpack_uint_24_8_depth_stencil_row(texImage->TexFormat, width, src, dest); break; case GL_FLOAT_32_UNSIGNED_INT_24_8_REV: _mesa_unpack_float_32_uint_24_8_depth_stencil_row(texImage->TexFormat, width, src, dest); break; default: unreachable("bad type in get_tex_depth_stencil()"); } if (ctx->Pack.SwapBytes) { _mesa_swap4((GLuint *) dest, width); } } ctx->Driver.UnmapTextureImage(ctx, texImage, zoffset + img); } else { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); break; } } } /** * glGetTexImage for stencil pixels. */ static void get_tex_stencil(struct gl_context *ctx, GLuint dimensions, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLint depth, GLenum format, GLenum type, GLvoid *pixels, struct gl_texture_image *texImage) { GLint img, row; assert(format == GL_STENCIL_INDEX); for (img = 0; img < depth; img++) { GLubyte *srcMap; GLint rowstride; /* map src texture buffer */ ctx->Driver.MapTextureImage(ctx, texImage, zoffset + img, xoffset, yoffset, 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); _mesa_unpack_ubyte_stencil_row(texImage->TexFormat, width, (const GLuint *) src, dest); } ctx->Driver.UnmapTextureImage(ctx, texImage, zoffset + 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, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLint depth, GLenum format, GLenum type, GLvoid *pixels, struct gl_texture_image *texImage) { GLint img, row; for (img = 0; img < depth; img++) { GLubyte *srcMap; GLint rowstride; /* map src texture buffer */ ctx->Driver.MapTextureImage(ctx, texImage, zoffset + img, xoffset, yoffset, 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, zoffset + img); } else { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); break; } } } /** * Depending on the base format involved we may need to apply a rebase * transform (for example: if we download to a Luminance format we want * G=0 and B=0). */ static bool teximage_needs_rebase(mesa_format texFormat, GLenum baseFormat, bool is_compressed, uint8_t *rebaseSwizzle) { bool needsRebase = false; if (baseFormat == GL_LUMINANCE || baseFormat == GL_INTENSITY) { needsRebase = true; rebaseSwizzle[0] = MESA_FORMAT_SWIZZLE_X; rebaseSwizzle[1] = MESA_FORMAT_SWIZZLE_ZERO; rebaseSwizzle[2] = MESA_FORMAT_SWIZZLE_ZERO; rebaseSwizzle[3] = MESA_FORMAT_SWIZZLE_ONE; } else if (baseFormat == GL_LUMINANCE_ALPHA) { needsRebase = true; rebaseSwizzle[0] = MESA_FORMAT_SWIZZLE_X; rebaseSwizzle[1] = MESA_FORMAT_SWIZZLE_ZERO; rebaseSwizzle[2] = MESA_FORMAT_SWIZZLE_ZERO; rebaseSwizzle[3] = MESA_FORMAT_SWIZZLE_W; } else if (!is_compressed && (baseFormat != _mesa_get_format_base_format(texFormat))) { needsRebase = _mesa_compute_rgba2base2rgba_component_mapping(baseFormat, rebaseSwizzle); } return needsRebase; } /** * Get a color texture image with decompression. */ static void get_tex_rgba_compressed(struct gl_context *ctx, GLuint dimensions, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLint depth, 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 mesa_format texFormat = _mesa_get_srgb_format_linear(texImage->TexFormat); const GLenum baseFormat = _mesa_get_format_base_format(texFormat); GLfloat *tempImage, *tempSlice; GLuint slice; int srcStride, dstStride; uint32_t dstFormat; bool needsRebase; uint8_t rebaseSwizzle[4]; /* Decompress into temp float buffer, then pack into user buffer */ tempImage = malloc(width * height * depth * 4 * sizeof(GLfloat)); if (!tempImage) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()"); return; } /* Decompress the texture image slices - results in 'tempImage' */ for (slice = 0; slice < depth; slice++) { GLubyte *srcMap; GLint srcRowStride; tempSlice = tempImage + slice * 4 * width * height; ctx->Driver.MapTextureImage(ctx, texImage, zoffset + slice, xoffset, yoffset, width, height, GL_MAP_READ_BIT, &srcMap, &srcRowStride); if (srcMap) { _mesa_decompress_image(texFormat, width, height, srcMap, srcRowStride, tempSlice); ctx->Driver.UnmapTextureImage(ctx, texImage, zoffset + slice); } else { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); free(tempImage); return; } } needsRebase = teximage_needs_rebase(texFormat, baseFormat, true, rebaseSwizzle); srcStride = 4 * width * sizeof(GLfloat); dstStride = _mesa_image_row_stride(&ctx->Pack, width, format, type); dstFormat = _mesa_format_from_format_and_type(format, type); tempSlice = tempImage; for (slice = 0; slice < depth; slice++) { void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, width, height, format, type, slice, 0, 0); _mesa_format_convert(dest, dstFormat, dstStride, tempSlice, RGBA32_FLOAT, srcStride, width, height, needsRebase ? rebaseSwizzle : NULL); /* Handle byte swapping if required */ if (ctx->Pack.SwapBytes) { _mesa_swap_bytes_2d_image(format, type, &ctx->Pack, width, height, dest, dest); } tempSlice += 4 * width * height; } free(tempImage); } /** * Return a base GL format given the user-requested format * for glGetTexImage(). */ GLenum _mesa_base_pack_format(GLenum format) { switch (format) { case GL_ABGR_EXT: case GL_BGRA: case GL_BGRA_INTEGER: case GL_RGBA_INTEGER: return GL_RGBA; case GL_BGR: case GL_BGR_INTEGER: case GL_RGB_INTEGER: return GL_RGB; case GL_RED_INTEGER: return GL_RED; case GL_GREEN_INTEGER: return GL_GREEN; case GL_BLUE_INTEGER: return GL_BLUE; case GL_ALPHA_INTEGER: return GL_ALPHA; case GL_LUMINANCE_INTEGER_EXT: return GL_LUMINANCE; case GL_LUMINANCE_ALPHA_INTEGER_EXT: return GL_LUMINANCE_ALPHA; default: return format; } } /** * Get an uncompressed color texture image. */ static void get_tex_rgba_uncompressed(struct gl_context *ctx, GLuint dimensions, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLint depth, 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 mesa_format texFormat = _mesa_get_srgb_format_linear(texImage->TexFormat); GLuint img; GLboolean dst_is_integer; uint32_t dst_format; int dst_stride; uint8_t rebaseSwizzle[4]; bool needsRebase; void *rgba = NULL; needsRebase = teximage_needs_rebase(texFormat, texImage->_BaseFormat, false, rebaseSwizzle); /* Describe the dst format */ dst_is_integer = _mesa_is_enum_format_integer(format); dst_format = _mesa_format_from_format_and_type(format, type); dst_stride = _mesa_image_row_stride(&ctx->Pack, width, format, type); /* Since _mesa_format_convert does not handle transferOps we need to handle * them before we call the function. This requires to convert to RGBA float * first so we can call _mesa_apply_rgba_transfer_ops. If the dst format is * integer then transferOps do not apply. */ assert(!transferOps || (transferOps && !dst_is_integer)); (void) dst_is_integer; /* silence unused var warning */ for (img = 0; img < depth; img++) { GLubyte *srcMap; GLint rowstride; GLubyte *img_src; void *dest; void *src; int src_stride; uint32_t src_format; /* map src texture buffer */ ctx->Driver.MapTextureImage(ctx, texImage, zoffset + img, xoffset, yoffset, width, height, GL_MAP_READ_BIT, &srcMap, &rowstride); if (!srcMap) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); goto done; } img_src = srcMap; dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, width, height, format, type, img, 0, 0); if (transferOps) { uint32_t rgba_format; int rgba_stride; bool need_convert = false; /* We will convert to RGBA float */ rgba_format = RGBA32_FLOAT; rgba_stride = width * 4 * sizeof(GLfloat); /* If we are lucky and the dst format matches the RGBA format we need * to convert to, then we can convert directly into the dst buffer * and avoid the final conversion/copy from the rgba buffer to the dst * buffer. */ if (format == rgba_format) { rgba = dest; } else { need_convert = true; if (rgba == NULL) { /* Allocate the RGBA buffer only once */ rgba = malloc(height * rgba_stride); if (!rgba) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()"); ctx->Driver.UnmapTextureImage(ctx, texImage, img); return; } } } _mesa_format_convert(rgba, rgba_format, rgba_stride, img_src, texFormat, rowstride, width, height, needsRebase ? rebaseSwizzle : NULL); /* Handle transfer ops now */ _mesa_apply_rgba_transfer_ops(ctx, transferOps, width * height, rgba); /* If we had to rebase, we have already handled that */ needsRebase = false; /* If we were lucky and our RGBA conversion matches the dst format, * then we are done. */ if (!need_convert) goto do_swap; /* Otherwise, we need to convert from RGBA to dst next */ src = rgba; src_format = rgba_format; src_stride = rgba_stride; } else { /* No RGBA conversion needed, convert directly to dst */ src = img_src; src_format = texFormat; src_stride = rowstride; } /* Do the conversion to destination format */ _mesa_format_convert(dest, dst_format, dst_stride, src, src_format, src_stride, width, height, needsRebase ? rebaseSwizzle : NULL); do_swap: /* Handle byte swapping if required */ if (ctx->Pack.SwapBytes) _mesa_swap_bytes_2d_image(format, type, &ctx->Pack, width, height, dest, dest); /* Unmap the src texture buffer */ ctx->Driver.UnmapTextureImage(ctx, texImage, zoffset + img); } done: 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, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLint depth, 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_HALF_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, xoffset, yoffset, zoffset, width, height, depth, format, type, pixels, texImage, transferOps); } else { get_tex_rgba_uncompressed(ctx, dimensions, xoffset, yoffset, zoffset, width, height, depth, 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, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLint depth, GLenum format, GLenum type, GLvoid *pixels, struct gl_texture_image *texImage) { const GLenum target = texImage->TexObject->Target; GLboolean memCopy = GL_FALSE; GLenum texBaseFormat = _mesa_get_format_base_format(texImage->TexFormat); /* * 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)) && texBaseFormat == texImage->_BaseFormat) { memCopy = _mesa_format_matches_format_and_type(texImage->TexFormat, format, type, ctx->Pack.SwapBytes, NULL); } if (depth > 1) { /* only a single slice is supported at this time */ memCopy = GL_FALSE; } if (memCopy) { const GLuint bpp = _mesa_get_format_bytes(texImage->TexFormat); const GLint bytesPerRow = width * bpp; GLubyte *dst = _mesa_image_address2d(&ctx->Pack, pixels, width, height, format, type, 0, 0); const GLint dstRowStride = _mesa_image_row_stride(&ctx->Pack, width, format, type); GLubyte *src; GLint srcRowStride; /* map src texture buffer */ ctx->Driver.MapTextureImage(ctx, texImage, zoffset, xoffset, yoffset, width, height, GL_MAP_READ_BIT, &src, &srcRowStride); if (src) { if (bytesPerRow == dstRowStride && bytesPerRow == srcRowStride) { memcpy(dst, src, bytesPerRow * height); } else { GLuint row; for (row = 0; row < height; row++) { memcpy(dst, src, bytesPerRow); dst += dstRowStride; src += srcRowStride; } } /* unmap src texture buffer */ ctx->Driver.UnmapTextureImage(ctx, texImage, zoffset); } else { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); } } return memCopy; } /** * This is the software fallback for Driver.GetTexSubImage(). * 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_GetTexSubImage_sw(struct gl_context *ctx, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLint depth, GLenum format, GLenum type, GLvoid *pixels, struct gl_texture_image *texImage) { const GLuint dimensions = _mesa_get_texture_dimensions(texImage->TexObject->Target); /* map dest buffer, if PBO */ if (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, MAP_INTERNAL); if (!buf) { /* out of memory or other unexpected error */ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage(map PBO failed)"); return; } /* was an offset into the PBO. * Now make it a real, client-side pointer inside the mapped region. */ pixels = ADD_POINTERS(buf, pixels); } /* for all array textures, the Z axis selects the layer */ if (texImage->TexObject->Target == GL_TEXTURE_1D_ARRAY) { depth = height; height = 1; zoffset = yoffset; yoffset = 0; assert(zoffset + depth <= texImage->Height); } else { assert(zoffset + depth <= texImage->Depth); } if (get_tex_memcpy(ctx, xoffset, yoffset, zoffset, width, height, depth, format, type, pixels, texImage)) { /* all done */ } else if (format == GL_DEPTH_COMPONENT) { get_tex_depth(ctx, dimensions, xoffset, yoffset, zoffset, width, height, depth, format, type, pixels, texImage); } else if (format == GL_DEPTH_STENCIL_EXT) { get_tex_depth_stencil(ctx, dimensions, xoffset, yoffset, zoffset, width, height, depth, format, type, pixels, texImage); } else if (format == GL_STENCIL_INDEX) { get_tex_stencil(ctx, dimensions, xoffset, yoffset, zoffset, width, height, depth, format, type, pixels, texImage); } else if (format == GL_YCBCR_MESA) { get_tex_ycbcr(ctx, dimensions, xoffset, yoffset, zoffset, width, height, depth, format, type, pixels, texImage); } else { get_tex_rgba(ctx, dimensions, xoffset, yoffset, zoffset, width, height, depth, format, type, pixels, texImage); } if (ctx->Pack.BufferObj) { ctx->Driver.UnmapBuffer(ctx, ctx->Pack.BufferObj, MAP_INTERNAL); } } /** * This function assumes that all error checking has been done. */ static void get_compressed_texsubimage_sw(struct gl_context *ctx, struct gl_texture_image *texImage, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLint height, GLint depth, GLvoid *img) { const GLuint dimensions = _mesa_get_texture_dimensions(texImage->TexObject->Target); struct compressed_pixelstore store; GLint slice; GLubyte *dest; _mesa_compute_compressed_pixelstore(dimensions, texImage->TexFormat, width, height, depth, &ctx->Pack, &store); if (ctx->Pack.BufferObj) { /* pack texture image into a PBO */ dest = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, ctx->Pack.BufferObj->Size, GL_MAP_WRITE_BIT, ctx->Pack.BufferObj, MAP_INTERNAL); if (!dest) { /* out of memory or other unexpected error */ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetCompresssedTexImage(map PBO failed)"); return; } dest = ADD_POINTERS(dest, img); } else { dest = img; } dest += store.SkipBytes; for (slice = 0; slice < store.CopySlices; slice++) { GLint srcRowStride; GLubyte *src; /* map src texture buffer */ ctx->Driver.MapTextureImage(ctx, texImage, zoffset + slice, xoffset, yoffset, width, height, GL_MAP_READ_BIT, &src, &srcRowStride); if (src) { GLint i; for (i = 0; i < store.CopyRowsPerSlice; i++) { memcpy(dest, src, store.CopyBytesPerRow); dest += store.TotalBytesPerRow; src += srcRowStride; } ctx->Driver.UnmapTextureImage(ctx, texImage, zoffset + slice); /* Advance to next slice */ dest += store.TotalBytesPerRow * (store.TotalRowsPerSlice - store.CopyRowsPerSlice); } else { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetCompresssedTexImage"); } } if (ctx->Pack.BufferObj) { ctx->Driver.UnmapBuffer(ctx, ctx->Pack.BufferObj, MAP_INTERNAL); } } /** * Validate the texture target enum supplied to glGetTex(ture)Image or * glGetCompressedTex(ture)Image. */ static GLboolean legal_getteximage_target(struct gl_context *ctx, GLenum target, bool dsa) { switch (target) { case GL_TEXTURE_1D: case GL_TEXTURE_2D: case GL_TEXTURE_3D: return GL_TRUE; 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.EXT_texture_array; case GL_TEXTURE_CUBE_MAP_ARRAY: return ctx->Extensions.ARB_texture_cube_map_array; /* Section 8.11 (Texture Queries) of the OpenGL 4.5 core profile spec * (30.10.2014) says: * "An INVALID_ENUM error is generated if the effective target is not * one of TEXTURE_1D, TEXTURE_2D, TEXTURE_3D, TEXTURE_1D_ARRAY, * TEXTURE_2D_ARRAY, TEXTURE_CUBE_MAP_ARRAY, TEXTURE_RECTANGLE, one of * the targets from table 8.19 (for GetTexImage and GetnTexImage *only*), * or TEXTURE_CUBE_MAP (for GetTextureImage *only*)." (Emphasis added.) */ case GL_TEXTURE_CUBE_MAP_POSITIVE_X: case GL_TEXTURE_CUBE_MAP_NEGATIVE_X: case GL_TEXTURE_CUBE_MAP_POSITIVE_Y: case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y: case GL_TEXTURE_CUBE_MAP_POSITIVE_Z: case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z: return dsa ? GL_FALSE : ctx->Extensions.ARB_texture_cube_map; case GL_TEXTURE_CUBE_MAP: return dsa ? GL_TRUE : GL_FALSE; default: return GL_FALSE; } } /** * Wrapper for _mesa_select_tex_image() which can handle target being * GL_TEXTURE_CUBE_MAP in which case we use zoffset to select a cube face. * This can happen for glGetTextureImage and glGetTextureSubImage (DSA * functions). */ static struct gl_texture_image * select_tex_image(const struct gl_texture_object *texObj, GLenum target, GLint level, GLint zoffset) { assert(level >= 0); assert(level < MAX_TEXTURE_LEVELS); if (target == GL_TEXTURE_CUBE_MAP) { assert(zoffset >= 0); assert(zoffset < 6); target = GL_TEXTURE_CUBE_MAP_POSITIVE_X + zoffset; } return _mesa_select_tex_image(texObj, target, level); } /** * Error-check the offset and size arguments to * glGet[Compressed]TextureSubImage(). * \return true if error, false if no error. */ static bool dimensions_error_check(struct gl_context *ctx, struct gl_texture_object *texObj, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, const char *caller) { const struct gl_texture_image *texImage; GLuint imageWidth = 0, imageHeight = 0, imageDepth = 0; if (xoffset < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(xoffset = %d)", caller, xoffset); return true; } if (yoffset < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(yoffset = %d)", caller, yoffset); return true; } if (zoffset < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(zoffset = %d)", caller, zoffset); return true; } if (width < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(width = %d)", caller, width); return true; } if (height < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(height = %d)", caller, height); return true; } if (depth < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(depth = %d)", caller, depth); return true; } /* do special per-target checks */ switch (target) { case GL_TEXTURE_1D: if (yoffset != 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(1D, yoffset = %d)", caller, yoffset); return true; } if (height != 1) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(1D, height = %d)", caller, height); return true; } /* fall-through */ case GL_TEXTURE_1D_ARRAY: case GL_TEXTURE_2D: case GL_TEXTURE_RECTANGLE: if (zoffset != 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(zoffset = %d)", caller, zoffset); return true; } if (depth != 1) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(depth = %d)", caller, depth); return true; } break; case GL_TEXTURE_CUBE_MAP: /* Non-array cube maps are special because we have a gl_texture_image * per face. */ if (zoffset + depth > 6) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(zoffset + depth = %d)", caller, zoffset + depth); return true; } break; default: ; /* nothing */ } texImage = select_tex_image(texObj, target, level, zoffset); if (texImage) { imageWidth = texImage->Width; imageHeight = texImage->Height; imageDepth = texImage->Depth; } if (xoffset + width > imageWidth) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(xoffset %d + width %d > %u)", caller, xoffset, width, imageWidth); return true; } if (yoffset + height > imageHeight) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(yoffset %d + height %d > %u)", caller, yoffset, height, imageHeight); return true; } if (target != GL_TEXTURE_CUBE_MAP) { /* Cube map error checking was done above */ if (zoffset + depth > imageDepth) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(zoffset %d + depth %d > %u)", caller, zoffset, depth, imageDepth); return true; } } /* Extra checks for compressed textures */ if (texImage) { GLuint bw, bh, bd; _mesa_get_format_block_size_3d(texImage->TexFormat, &bw, &bh, &bd); if (bw > 1 || bh > 1 || bd > 1) { /* offset must be multiple of block size */ if (xoffset % bw != 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(xoffset = %d)", caller, xoffset); return true; } if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) { if (yoffset % bh != 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(yoffset = %d)", caller, yoffset); return true; } } if (zoffset % bd != 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(zoffset = %d)", caller, zoffset); return true; } /* The size must be a multiple of bw x bh x bd, or we must be using a * offset+size that exactly hits the edge of the image. */ if ((width % bw != 0) && (xoffset + width != (GLint) texImage->Width)) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(width = %d)", caller, width); return true; } if ((height % bh != 0) && (yoffset + height != (GLint) texImage->Height)) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(height = %d)", caller, height); return true; } if ((depth % bd != 0) && (zoffset + depth != (GLint) texImage->Depth)) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(depth = %d)", caller, depth); return true; } } } if (width == 0 || height == 0 || depth == 0) { /* Not an error, but nothing to do. Return 'true' so that the * caller simply returns. */ return true; } return false; } /** * Do PBO-related error checking for getting uncompressed images. * \return true if there was an error (or the GetTexImage is to be a no-op) */ static bool pbo_error_check(struct gl_context *ctx, GLenum target, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, GLsizei clientMemSize, GLvoid *pixels, const char *caller) { const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2; if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, width, height, depth, format, type, clientMemSize, pixels)) { if (ctx->Pack.BufferObj) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(out of bounds PBO access)", caller); } else { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(out of bounds access: bufSize (%d) is too small)", caller, clientMemSize); } return true; } if (ctx->Pack.BufferObj) { /* PBO should not be mapped */ if (_mesa_check_disallowed_mapping(ctx->Pack.BufferObj)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(PBO is mapped)", caller); return true; } } if (!ctx->Pack.BufferObj && !pixels) { /* not an error, do nothing */ return true; } return false; } /** * Do teximage-related error checking for getting uncompressed images. * \return true if there was an error */ static bool teximage_error_check(struct gl_context *ctx, struct gl_texture_image *texImage, GLenum format, const char *caller) { GLenum baseFormat; assert(texImage); /* * Format and type checking has been moved up to GetnTexImage and * GetTextureImage so that it happens before getting the texImage object. */ 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, "%s(format mismatch)", caller); return true; } else if (_mesa_is_depth_format(format) && !_mesa_is_depth_format(baseFormat) && !_mesa_is_depthstencil_format(baseFormat)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(format mismatch)", caller); return true; } else if (_mesa_is_stencil_format(format) && !ctx->Extensions.ARB_texture_stencil8) { _mesa_error(ctx, GL_INVALID_ENUM, "%s(format=GL_STENCIL_INDEX)", caller); return true; } else if (_mesa_is_stencil_format(format) && !_mesa_is_depthstencil_format(baseFormat) && !_mesa_is_stencil_format(baseFormat)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(format mismatch)", caller); return true; } else if (_mesa_is_ycbcr_format(format) && !_mesa_is_ycbcr_format(baseFormat)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(format mismatch)", caller); return true; } else if (_mesa_is_depthstencil_format(format) && !_mesa_is_depthstencil_format(baseFormat)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(format mismatch)", caller); return true; } else if (!_mesa_is_stencil_format(format) && _mesa_is_enum_format_integer(format) != _mesa_is_format_integer(texImage->TexFormat)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(format mismatch)", caller); return true; } return false; } /** * Do common teximage-related error checking for getting uncompressed images. * \return true if there was an error */ static bool common_error_check(struct gl_context *ctx, struct gl_texture_object *texObj, GLenum target, GLint level, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, GLsizei bufSize, GLvoid *pixels, const char *caller) { GLenum err; GLint maxLevels; if (texObj->Target == 0) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(invalid texture)", caller); return true; } maxLevels = _mesa_max_texture_levels(ctx, target); if (level < 0 || level >= maxLevels) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(level = %d)", caller, level); return true; } err = _mesa_error_check_format_and_type(ctx, format, type); if (err != GL_NO_ERROR) { _mesa_error(ctx, err, "%s(format/type)", caller); return true; } /* According to OpenGL 4.6 spec, section 8.11.4 ("Texture Image Queries"): * * "An INVALID_OPERATION error is generated by GetTextureImage if the * effective target is TEXTURE_CUBE_MAP or TEXTURE_CUBE_MAP_ARRAY , * and the texture object is not cube complete or cube array complete, * respectively." * * This applies also to GetTextureSubImage, GetCompressedTexImage, * GetCompressedTextureImage, and GetnCompressedTexImage. */ if (target == GL_TEXTURE_CUBE_MAP && !_mesa_cube_complete(texObj)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(cube incomplete)", caller); return true; } return false; } /** * Do error checking for all (non-compressed) get-texture-image functions. * \return true if any error, false if no errors. */ static bool getteximage_error_check(struct gl_context *ctx, struct gl_texture_object *texObj, GLenum target, GLint level, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, GLsizei bufSize, GLvoid *pixels, const char *caller) { struct gl_texture_image *texImage; assert(texObj); if (common_error_check(ctx, texObj, target, level, width, height, depth, format, type, bufSize, pixels, caller)) { return true; } if (width == 0 || height == 0 || depth == 0) { /* Not an error, but nothing to do. Return 'true' so that the * caller simply returns. */ return true; } if (pbo_error_check(ctx, target, width, height, depth, format, type, bufSize, pixels, caller)) { return true; } texImage = select_tex_image(texObj, target, level, 0); if (teximage_error_check(ctx, texImage, format, caller)) { return true; } return false; } /** * Do error checking for all (non-compressed) get-texture-image functions. * \return true if any error, false if no errors. */ static bool gettexsubimage_error_check(struct gl_context *ctx, struct gl_texture_object *texObj, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, GLsizei bufSize, GLvoid *pixels, const char *caller) { struct gl_texture_image *texImage; assert(texObj); if (common_error_check(ctx, texObj, target, level, width, height, depth, format, type, bufSize, pixels, caller)) { return true; } if (dimensions_error_check(ctx, texObj, target, level, xoffset, yoffset, zoffset, width, height, depth, caller)) { return true; } if (pbo_error_check(ctx, target, width, height, depth, format, type, bufSize, pixels, caller)) { return true; } texImage = select_tex_image(texObj, target, level, zoffset); if (teximage_error_check(ctx, texImage, format, caller)) { return true; } return false; } /** * Return the width, height and depth of a texture image. * This function must be resilient to bad parameter values since * this is called before full error checking. */ static void get_texture_image_dims(const struct gl_texture_object *texObj, GLenum target, GLint level, GLsizei *width, GLsizei *height, GLsizei *depth) { const struct gl_texture_image *texImage = NULL; if (level >= 0 && level < MAX_TEXTURE_LEVELS) { texImage = _mesa_select_tex_image(texObj, target, level); } if (texImage) { *width = texImage->Width; *height = texImage->Height; if (target == GL_TEXTURE_CUBE_MAP) { *depth = 6; } else { *depth = texImage->Depth; } } else { *width = *height = *depth = 0; } } /** * Common code for all (uncompressed) get-texture-image functions. * \param texObj the texture object (should not be null) * \param target user-provided target, or 0 for DSA * \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. * \param caller name of calling function */ static void get_texture_image(struct gl_context *ctx, struct gl_texture_object *texObj, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLint depth, GLenum format, GLenum type, GLvoid *pixels, const char *caller) { struct gl_texture_image *texImage; unsigned firstFace, numFaces, i; GLint imageStride; FLUSH_VERTICES(ctx, 0); texImage = select_tex_image(texObj, target, level, zoffset); assert(texImage); /* should have been error checked already */ if (_mesa_is_zero_size_texture(texImage)) { /* no image data to return */ return; } if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) { _mesa_debug(ctx, "%s(tex %u) format = %s, w=%d, h=%d," " dstFmt=0x%x, dstType=0x%x\n", caller, texObj->Name, _mesa_get_format_name(texImage->TexFormat), texImage->Width, texImage->Height, format, type); } if (target == GL_TEXTURE_CUBE_MAP) { /* Compute stride between cube faces */ imageStride = _mesa_image_image_stride(&ctx->Pack, width, height, format, type); firstFace = zoffset; numFaces = depth; zoffset = 0; depth = 1; } else { imageStride = 0; firstFace = _mesa_tex_target_to_face(target); numFaces = 1; } _mesa_lock_texture(ctx, texObj); for (i = 0; i < numFaces; i++) { texImage = texObj->Image[firstFace + i][level]; assert(texImage); ctx->Driver.GetTexSubImage(ctx, xoffset, yoffset, zoffset, width, height, depth, format, type, pixels, texImage); /* next cube face */ pixels = (GLubyte *) pixels + imageStride; } _mesa_unlock_texture(ctx, texObj); } static void _get_texture_image(struct gl_context *ctx, struct gl_texture_object *texObj, GLenum target, GLint level, GLenum format, GLenum type, GLsizei bufSize, GLvoid *pixels, const char *caller) { GLsizei width, height, depth; /* EXT/ARB direct_state_access variants don't call _get_texture_image * with a NULL texObj */ bool is_dsa = texObj != NULL; if (!is_dsa) { texObj = _mesa_get_current_tex_object(ctx, target); assert(texObj); } get_texture_image_dims(texObj, target, level, &width, &height, &depth); if (getteximage_error_check(ctx, texObj, target, level, width, height, depth, format, type, bufSize, pixels, caller)) { return; } get_texture_image(ctx, texObj, target, level, 0, 0, 0, width, height, depth, format, type, pixels, caller); } void GLAPIENTRY _mesa_GetnTexImageARB(GLenum target, GLint level, GLenum format, GLenum type, GLsizei bufSize, GLvoid *pixels) { GET_CURRENT_CONTEXT(ctx); static const char *caller = "glGetnTexImageARB"; if (!legal_getteximage_target(ctx, target, false)) { _mesa_error(ctx, GL_INVALID_ENUM, "%s", caller); return; } _get_texture_image(ctx, NULL, target, level, format, type, bufSize, pixels, caller); } void GLAPIENTRY _mesa_GetTexImage(GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels ) { GET_CURRENT_CONTEXT(ctx); static const char *caller = "glGetTexImage"; if (!legal_getteximage_target(ctx, target, false)) { _mesa_error(ctx, GL_INVALID_ENUM, "%s", caller); return; } _get_texture_image(ctx, NULL, target, level, format, type, INT_MAX, pixels, caller); } void GLAPIENTRY _mesa_GetTextureImage(GLuint texture, GLint level, GLenum format, GLenum type, GLsizei bufSize, GLvoid *pixels) { GET_CURRENT_CONTEXT(ctx); static const char *caller = "glGetTextureImage"; struct gl_texture_object *texObj = _mesa_lookup_texture_err(ctx, texture, caller); if (!texObj) { return; } if (!legal_getteximage_target(ctx, texObj->Target, true)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller); return; } _get_texture_image(ctx, texObj, texObj->Target, level, format, type, bufSize, pixels, caller); } void GLAPIENTRY _mesa_GetTextureImageEXT(GLuint texture, GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels) { GET_CURRENT_CONTEXT(ctx); static const char *caller = "glGetTextureImageEXT"; struct gl_texture_object *texObj = _mesa_lookup_or_create_texture(ctx, target, texture, false, true, caller); if (!texObj) { return; } if (!legal_getteximage_target(ctx, target, true)) { _mesa_error(ctx, GL_INVALID_ENUM, "%s", caller); return; } _get_texture_image(ctx, texObj, target, level, format, type, INT_MAX, pixels, caller); } void GLAPIENTRY _mesa_GetMultiTexImageEXT(GLenum texunit, GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels) { GET_CURRENT_CONTEXT(ctx); GLsizei width, height, depth; static const char *caller = "glGetMultiTexImageEXT"; struct gl_texture_object *texObj = _mesa_get_texobj_by_target_and_texunit(ctx, target, texunit - GL_TEXTURE0, false, caller); if (!texObj) { return; } if (!legal_getteximage_target(ctx, texObj->Target, true)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller); return; } get_texture_image_dims(texObj, texObj->Target, level, &width, &height, &depth); if (getteximage_error_check(ctx, texObj, texObj->Target, level, width, height, depth, format, type, INT_MAX, pixels, caller)) { return; } get_texture_image(ctx, texObj, texObj->Target, level, 0, 0, 0, width, height, depth, format, type, pixels, caller); } void GLAPIENTRY _mesa_GetTextureSubImage(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, GLsizei bufSize, void *pixels) { GET_CURRENT_CONTEXT(ctx); static const char *caller = "glGetTextureSubImage"; struct gl_texture_object *texObj = _mesa_lookup_texture_err(ctx, texture, caller); if (!texObj) { return; } if (!legal_getteximage_target(ctx, texObj->Target, true)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(buffer/multisample texture)", caller); return; } if (gettexsubimage_error_check(ctx, texObj, texObj->Target, level, xoffset, yoffset, zoffset, width, height, depth, format, type, bufSize, pixels, caller)) { return; } get_texture_image(ctx, texObj, texObj->Target, level, xoffset, yoffset, zoffset, width, height, depth, format, type, pixels, caller); } /** * Compute the number of bytes which will be written when retrieving * a sub-region of a compressed texture. */ static GLsizei packed_compressed_size(GLuint dimensions, mesa_format format, GLsizei width, GLsizei height, GLsizei depth, const struct gl_pixelstore_attrib *packing) { struct compressed_pixelstore st; GLsizei totalBytes; _mesa_compute_compressed_pixelstore(dimensions, format, width, height, depth, packing, &st); totalBytes = (st.CopySlices - 1) * st.TotalRowsPerSlice * st.TotalBytesPerRow + st.SkipBytes + (st.CopyRowsPerSlice - 1) * st.TotalBytesPerRow + st.CopyBytesPerRow; return totalBytes; } /** * Do error checking for getting compressed texture images. * \return true if any error, false if no errors. */ static bool getcompressedteximage_error_check(struct gl_context *ctx, struct gl_texture_object *texObj, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLsizei bufSize, GLvoid *pixels, const char *caller) { struct gl_texture_image *texImage; GLint maxLevels; GLsizei totalBytes; GLuint dimensions; assert(texObj); if (texObj->Target == 0) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(invalid texture)", caller); return true; } maxLevels = _mesa_max_texture_levels(ctx, target); if (level < 0 || level >= maxLevels) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(bad level = %d)", caller, level); return true; } if (dimensions_error_check(ctx, texObj, target, level, xoffset, yoffset, zoffset, width, height, depth, caller)) { return true; } texImage = select_tex_image(texObj, target, level, zoffset); assert(texImage); if (!_mesa_is_format_compressed(texImage->TexFormat)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(texture is not compressed)", caller); return true; } /* Check for invalid pixel storage modes */ dimensions = _mesa_get_texture_dimensions(texObj->Target); if (!_mesa_compressed_pixel_storage_error_check(ctx, dimensions, &ctx->Pack, caller)) { return true; } /* Compute number of bytes that may be touched in the dest buffer */ totalBytes = packed_compressed_size(dimensions, texImage->TexFormat, width, height, depth, &ctx->Pack); /* Do dest buffer bounds checking */ if (ctx->Pack.BufferObj) { /* do bounds checking on PBO write */ if ((GLubyte *) pixels + totalBytes > (GLubyte *) ctx->Pack.BufferObj->Size) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(out of bounds PBO access)", caller); return true; } /* make sure PBO is not mapped */ if (_mesa_check_disallowed_mapping(ctx->Pack.BufferObj)) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(PBO is mapped)", caller); return true; } } else { /* do bounds checking on writing to client memory */ if (totalBytes > bufSize) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(out of bounds access: bufSize (%d) is too small)", caller, bufSize); return true; } } if (!ctx->Pack.BufferObj && !pixels) { /* not an error, but do nothing */ return true; } return false; } /** * Common helper for all glGetCompressed-teximage functions. */ static void get_compressed_texture_image(struct gl_context *ctx, struct gl_texture_object *texObj, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLint depth, GLvoid *pixels, const char *caller) { struct gl_texture_image *texImage; unsigned firstFace, numFaces, i, imageStride; FLUSH_VERTICES(ctx, 0); texImage = select_tex_image(texObj, target, level, zoffset); assert(texImage); /* should have been error checked already */ if (_mesa_is_zero_size_texture(texImage)) return; if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) { _mesa_debug(ctx, "%s(tex %u) format = %s, w=%d, h=%d\n", caller, texObj->Name, _mesa_get_format_name(texImage->TexFormat), texImage->Width, texImage->Height); } if (target == GL_TEXTURE_CUBE_MAP) { struct compressed_pixelstore store; /* Compute image stride between cube faces */ _mesa_compute_compressed_pixelstore(2, texImage->TexFormat, width, height, depth, &ctx->Pack, &store); imageStride = store.TotalBytesPerRow * store.TotalRowsPerSlice; firstFace = zoffset; numFaces = depth; zoffset = 0; depth = 1; } else { imageStride = 0; firstFace = _mesa_tex_target_to_face(target); numFaces = 1; } _mesa_lock_texture(ctx, texObj); for (i = 0; i < numFaces; i++) { texImage = texObj->Image[firstFace + i][level]; assert(texImage); get_compressed_texsubimage_sw(ctx, texImage, xoffset, yoffset, zoffset, width, height, depth, pixels); /* next cube face */ pixels = (GLubyte *) pixels + imageStride; } _mesa_unlock_texture(ctx, texObj); } void GLAPIENTRY _mesa_GetnCompressedTexImageARB(GLenum target, GLint level, GLsizei bufSize, GLvoid *pixels) { GET_CURRENT_CONTEXT(ctx); static const char *caller = "glGetnCompressedTexImageARB"; GLsizei width, height, depth; struct gl_texture_object *texObj; if (!legal_getteximage_target(ctx, target, false)) { _mesa_error(ctx, GL_INVALID_ENUM, "%s", caller); return; } texObj = _mesa_get_current_tex_object(ctx, target); assert(texObj); get_texture_image_dims(texObj, target, level, &width, &height, &depth); if (getcompressedteximage_error_check(ctx, texObj, target, level, 0, 0, 0, width, height, depth, INT_MAX, pixels, caller)) { return; } get_compressed_texture_image(ctx, texObj, target, level, 0, 0, 0, width, height, depth, pixels, caller); } void GLAPIENTRY _mesa_GetCompressedTexImage(GLenum target, GLint level, GLvoid *pixels) { GET_CURRENT_CONTEXT(ctx); static const char *caller = "glGetCompressedTexImage"; GLsizei width, height, depth; struct gl_texture_object *texObj; if (!legal_getteximage_target(ctx, target, false)) { _mesa_error(ctx, GL_INVALID_ENUM, "%s", caller); return; } texObj = _mesa_get_current_tex_object(ctx, target); assert(texObj); get_texture_image_dims(texObj, target, level, &width, &height, &depth); if (getcompressedteximage_error_check(ctx, texObj, target, level, 0, 0, 0, width, height, depth, INT_MAX, pixels, caller)) { return; } get_compressed_texture_image(ctx, texObj, target, level, 0, 0, 0, width, height, depth, pixels, caller); } void GLAPIENTRY _mesa_GetCompressedTextureImageEXT(GLuint texture, GLenum target, GLint level, GLvoid *pixels) { GET_CURRENT_CONTEXT(ctx); struct gl_texture_object* texObj; GLsizei width, height, depth; static const char *caller = "glGetCompressedTextureImageEXT"; texObj = _mesa_lookup_or_create_texture(ctx, target, texture, false, true, caller); get_texture_image_dims(texObj, texObj->Target, level, &width, &height, &depth); if (getcompressedteximage_error_check(ctx, texObj, texObj->Target, level, 0, 0, 0, width, height, depth, INT_MAX, pixels, caller)) { return; } get_compressed_texture_image(ctx, texObj, texObj->Target, level, 0, 0, 0, width, height, depth, pixels, caller); } void GLAPIENTRY _mesa_GetCompressedMultiTexImageEXT(GLenum texunit, GLenum target, GLint level, GLvoid *pixels) { GET_CURRENT_CONTEXT(ctx); struct gl_texture_object* texObj; GLsizei width, height, depth; static const char *caller = "glGetCompressedMultiTexImageEXT"; texObj = _mesa_get_texobj_by_target_and_texunit(ctx, target, texunit - GL_TEXTURE0, false, caller); get_texture_image_dims(texObj, texObj->Target, level, &width, &height, &depth); if (getcompressedteximage_error_check(ctx, texObj, texObj->Target, level, 0, 0, 0, width, height, depth, INT_MAX, pixels, caller)) { return; } get_compressed_texture_image(ctx, texObj, texObj->Target, level, 0, 0, 0, width, height, depth, pixels, caller); } void GLAPIENTRY _mesa_GetCompressedTextureImage(GLuint texture, GLint level, GLsizei bufSize, GLvoid *pixels) { GET_CURRENT_CONTEXT(ctx); static const char *caller = "glGetCompressedTextureImage"; GLsizei width, height, depth; struct gl_texture_object *texObj = _mesa_lookup_texture_err(ctx, texture, caller); if (!texObj) { return; } get_texture_image_dims(texObj, texObj->Target, level, &width, &height, &depth); if (getcompressedteximage_error_check(ctx, texObj, texObj->Target, level, 0, 0, 0, width, height, depth, bufSize, pixels, caller)) { return; } get_compressed_texture_image(ctx, texObj, texObj->Target, level, 0, 0, 0, width, height, depth, pixels, caller); } void GLAPIENTRY _mesa_GetCompressedTextureSubImage(GLuint texture, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLsizei bufSize, void *pixels) { GET_CURRENT_CONTEXT(ctx); static const char *caller = "glGetCompressedTextureImage"; struct gl_texture_object *texObj = NULL; texObj = _mesa_lookup_texture_err(ctx, texture, caller); if (!texObj) { return; } if (getcompressedteximage_error_check(ctx, texObj, texObj->Target, level, xoffset, yoffset, zoffset, width, height, depth, bufSize, pixels, caller)) { return; } get_compressed_texture_image(ctx, texObj, texObj->Target, level, xoffset, yoffset, zoffset, width, height, depth, pixels, caller); }