| /* |
| * 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; |
| } |
| /* <pixels> 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); |
| } |
