X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Ftexcompress.c;h=0fd1a3683d1ffacf4cbaeb4ac1f4fb872c8f5df9;hb=512aa0647f328fff69b3ce328b6466f2da8b7c4d;hp=5045aef06cc1db820569e481351ff02b4d6c3aee;hpb=d4a38e86d4b4d66cca20ee63222f940cb73fa709;p=mesa.git diff --git a/src/mesa/main/texcompress.c b/src/mesa/main/texcompress.c index 5045aef06cc..0fd1a3683d1 100644 --- a/src/mesa/main/texcompress.c +++ b/src/mesa/main/texcompress.c @@ -1,6 +1,5 @@ /* * Mesa 3-D graphics library - * Version: 6.5.1 * * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. * Copyright (c) 2008 VMware, Inc. @@ -18,9 +17,10 @@ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * 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. */ @@ -32,16 +32,16 @@ #include "glheader.h" #include "imports.h" -#include "colormac.h" +#include "context.h" #include "formats.h" -#include "mfeatures.h" #include "mtypes.h" +#include "context.h" #include "texcompress.h" #include "texcompress_fxt1.h" #include "texcompress_rgtc.h" #include "texcompress_s3tc.h" #include "texcompress_etc.h" -#include "swrast/s_context.h" +#include "texcompress_bptc.h" /** @@ -77,29 +77,35 @@ _mesa_gl_compressed_format_base_format(GLenum format) { switch (format) { case GL_COMPRESSED_RED: + case GL_COMPRESSED_R11_EAC: case GL_COMPRESSED_RED_RGTC1: + case GL_COMPRESSED_SIGNED_R11_EAC: case GL_COMPRESSED_SIGNED_RED_RGTC1: return GL_RED; case GL_COMPRESSED_RG: + case GL_COMPRESSED_RG11_EAC: case GL_COMPRESSED_RG_RGTC2: + case GL_COMPRESSED_SIGNED_RG11_EAC: case GL_COMPRESSED_SIGNED_RG_RGTC2: return GL_RG; case GL_COMPRESSED_RGB: case GL_COMPRESSED_SRGB: + case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_ARB: + case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_ARB: case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: case GL_COMPRESSED_RGB_FXT1_3DFX: case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT: case GL_ETC1_RGB8_OES: + case GL_COMPRESSED_RGB8_ETC2: + case GL_COMPRESSED_SRGB8_ETC2: return GL_RGB; case GL_COMPRESSED_RGBA: case GL_COMPRESSED_SRGB_ALPHA: case GL_COMPRESSED_RGBA_BPTC_UNORM_ARB: case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_ARB: - case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_ARB: - case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_ARB: case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT: case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT: @@ -107,6 +113,10 @@ _mesa_gl_compressed_format_base_format(GLenum format) case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT: case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT: case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT: + case GL_COMPRESSED_RGBA8_ETC2_EAC: + case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC: + case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2: + case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2: return GL_RGBA; case GL_COMPRESSED_ALPHA: @@ -225,6 +235,12 @@ _mesa_gl_compressed_format_base_format(GLenum format) * GL_EXT_texture_compression_latc. At the very least, Catalyst 11.6 does not * expose the 3dc formats through this mechanism. * + * The spec for GL_ARB_texture_compression_bptc doesn't mention whether it + * should be included in GL_COMPRESSED_TEXTURE_FORMATS. However as it takes a + * very long time to compress the textures in this format it's probably not + * very useful as a general format where the GL will have to compress it on + * the fly. + * * \param ctx the GL context * \param formats the resulting format list (may be NULL). * @@ -253,20 +269,54 @@ _mesa_get_compressed_formats(struct gl_context *ctx, GLint *formats) else { n += 3; } - } - if (ctx->Extensions.S3_s3tc) { - if (formats) { - formats[n++] = GL_RGB_S3TC; - formats[n++] = GL_RGB4_S3TC; - formats[n++] = GL_RGBA_S3TC; - formats[n++] = GL_RGBA4_S3TC; - } - else { - n += 4; + + /* The ES and desktop GL specs diverge here. + * + * In desktop OpenGL, the driver can perform online compression of + * uncompressed texture data. GL_NUM_COMPRESSED_TEXTURE_FORMATS and + * GL_COMPRESSED_TEXTURE_FORMATS give the application a list of + * formats that it could ask the driver to compress with some + * expectation of quality. The GL_ARB_texture_compression spec + * calls this "suitable for general-purpose usage." As noted + * above, this means GL_COMPRESSED_RGBA_S3TC_DXT1_EXT is not + * included in the list. + * + * In OpenGL ES, the driver never performs compression. + * GL_NUM_COMPRESSED_TEXTURE_FORMATS and + * GL_COMPRESSED_TEXTURE_FORMATS give the application a list of + * formats that the driver can receive from the application. It + * is the *complete* list of formats. The + * GL_EXT_texture_compression_s3tc spec says: + * + * "New State for OpenGL ES 2.0.25 and 3.0.2 Specifications + * + * The queries for NUM_COMPRESSED_TEXTURE_FORMATS and + * COMPRESSED_TEXTURE_FORMATS include + * COMPRESSED_RGB_S3TC_DXT1_EXT, + * COMPRESSED_RGBA_S3TC_DXT1_EXT, + * COMPRESSED_RGBA_S3TC_DXT3_EXT, and + * COMPRESSED_RGBA_S3TC_DXT5_EXT." + * + * Note that the addition is only to the OpenGL ES specification! + */ + if (_mesa_is_gles(ctx)) { + if (formats) { + formats[n++] = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT; + } else { + n += 1; + } } } - if (ctx->Extensions.OES_compressed_ETC1_RGB8_texture) { + /* The GL_OES_compressed_ETC1_RGB8_texture spec says: + * + * "New State + * + * The queries for NUM_COMPRESSED_TEXTURE_FORMATS and + * COMPRESSED_TEXTURE_FORMATS include ETC1_RGB8_OES." + */ + if (_mesa_is_gles(ctx) + && ctx->Extensions.OES_compressed_ETC1_RGB8_texture) { if (formats) { formats[n++] = GL_ETC1_RGB8_OES; } @@ -275,7 +325,6 @@ _mesa_get_compressed_formats(struct gl_context *ctx, GLint *formats) } } -#if FEATURE_ES1 if (ctx->API == API_OPENGLES) { if (formats) { formats[n++] = GL_PALETTE4_RGB8_OES; @@ -293,8 +342,24 @@ _mesa_get_compressed_formats(struct gl_context *ctx, GLint *formats) n += 10; } } -#endif + if (_mesa_is_gles3(ctx)) { + if (formats) { + formats[n++] = GL_COMPRESSED_RGB8_ETC2; + formats[n++] = GL_COMPRESSED_SRGB8_ETC2; + formats[n++] = GL_COMPRESSED_RGBA8_ETC2_EAC; + formats[n++] = GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC; + formats[n++] = GL_COMPRESSED_R11_EAC; + formats[n++] = GL_COMPRESSED_RG11_EAC; + formats[n++] = GL_COMPRESSED_SIGNED_R11_EAC; + formats[n++] = GL_COMPRESSED_SIGNED_RG11_EAC; + formats[n++] = GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2; + formats[n++] = GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2; + } + else { + n += 10; + } + } return n; } @@ -302,7 +367,7 @@ _mesa_get_compressed_formats(struct gl_context *ctx, GLint *formats) /** * Convert a compressed MESA_FORMAT_x to a GLenum. */ -gl_format +mesa_format _mesa_glenum_to_compressed_format(GLenum format) { switch (format) { @@ -334,26 +399,55 @@ _mesa_glenum_to_compressed_format(GLenum format) return MESA_FORMAT_SRGBA_DXT5; case GL_COMPRESSED_RED_RGTC1: - return MESA_FORMAT_RED_RGTC1; + return MESA_FORMAT_R_RGTC1_UNORM; case GL_COMPRESSED_SIGNED_RED_RGTC1: - return MESA_FORMAT_SIGNED_RED_RGTC1; + return MESA_FORMAT_R_RGTC1_SNORM; case GL_COMPRESSED_RG_RGTC2: - return MESA_FORMAT_RG_RGTC2; + return MESA_FORMAT_RG_RGTC2_UNORM; case GL_COMPRESSED_SIGNED_RG_RGTC2: - return MESA_FORMAT_SIGNED_RG_RGTC2; + return MESA_FORMAT_RG_RGTC2_SNORM; case GL_COMPRESSED_LUMINANCE_LATC1_EXT: - return MESA_FORMAT_L_LATC1; + return MESA_FORMAT_L_LATC1_UNORM; case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT: - return MESA_FORMAT_SIGNED_L_LATC1; + return MESA_FORMAT_L_LATC1_SNORM; case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT: case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI: - return MESA_FORMAT_LA_LATC2; + return MESA_FORMAT_LA_LATC2_UNORM; case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT: - return MESA_FORMAT_SIGNED_LA_LATC2; + return MESA_FORMAT_LA_LATC2_SNORM; case GL_ETC1_RGB8_OES: return MESA_FORMAT_ETC1_RGB8; + case GL_COMPRESSED_RGB8_ETC2: + return MESA_FORMAT_ETC2_RGB8; + case GL_COMPRESSED_SRGB8_ETC2: + return MESA_FORMAT_ETC2_SRGB8; + case GL_COMPRESSED_RGBA8_ETC2_EAC: + return MESA_FORMAT_ETC2_RGBA8_EAC; + case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC: + return MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC; + case GL_COMPRESSED_R11_EAC: + return MESA_FORMAT_ETC2_R11_EAC; + case GL_COMPRESSED_RG11_EAC: + return MESA_FORMAT_ETC2_RG11_EAC; + case GL_COMPRESSED_SIGNED_R11_EAC: + return MESA_FORMAT_ETC2_SIGNED_R11_EAC; + case GL_COMPRESSED_SIGNED_RG11_EAC: + return MESA_FORMAT_ETC2_SIGNED_RG11_EAC; + case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2: + return MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1; + case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2: + return MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1; + + case GL_COMPRESSED_RGBA_BPTC_UNORM: + return MESA_FORMAT_BPTC_RGBA_UNORM; + case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM: + return MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM; + case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT: + return MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT; + case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT: + return MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT; default: return MESA_FORMAT_NONE; @@ -372,16 +466,13 @@ _mesa_glenum_to_compressed_format(GLenum format) * internal format unchanged. */ GLenum -_mesa_compressed_format_to_glenum(struct gl_context *ctx, GLuint mesaFormat) +_mesa_compressed_format_to_glenum(struct gl_context *ctx, mesa_format mesaFormat) { switch (mesaFormat) { -#if FEATURE_texture_fxt1 case MESA_FORMAT_RGB_FXT1: return GL_COMPRESSED_RGB_FXT1_3DFX; case MESA_FORMAT_RGBA_FXT1: return GL_COMPRESSED_RGBA_FXT1_3DFX; -#endif -#if FEATURE_texture_s3tc case MESA_FORMAT_RGB_DXT1: return GL_COMPRESSED_RGB_S3TC_DXT1_EXT; case MESA_FORMAT_RGBA_DXT1: @@ -390,7 +481,6 @@ _mesa_compressed_format_to_glenum(struct gl_context *ctx, GLuint mesaFormat) return GL_COMPRESSED_RGBA_S3TC_DXT3_EXT; case MESA_FORMAT_RGBA_DXT5: return GL_COMPRESSED_RGBA_S3TC_DXT5_EXT; -#if FEATURE_EXT_texture_sRGB case MESA_FORMAT_SRGB_DXT1: return GL_COMPRESSED_SRGB_S3TC_DXT1_EXT; case MESA_FORMAT_SRGBA_DXT1: @@ -399,29 +489,55 @@ _mesa_compressed_format_to_glenum(struct gl_context *ctx, GLuint mesaFormat) return GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT; case MESA_FORMAT_SRGBA_DXT5: return GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT; -#endif -#endif - - case MESA_FORMAT_RED_RGTC1: + case MESA_FORMAT_R_RGTC1_UNORM: return GL_COMPRESSED_RED_RGTC1; - case MESA_FORMAT_SIGNED_RED_RGTC1: + case MESA_FORMAT_R_RGTC1_SNORM: return GL_COMPRESSED_SIGNED_RED_RGTC1; - case MESA_FORMAT_RG_RGTC2: + case MESA_FORMAT_RG_RGTC2_UNORM: return GL_COMPRESSED_RG_RGTC2; - case MESA_FORMAT_SIGNED_RG_RGTC2: + case MESA_FORMAT_RG_RGTC2_SNORM: return GL_COMPRESSED_SIGNED_RG_RGTC2; - case MESA_FORMAT_L_LATC1: + case MESA_FORMAT_L_LATC1_UNORM: return GL_COMPRESSED_LUMINANCE_LATC1_EXT; - case MESA_FORMAT_SIGNED_L_LATC1: + case MESA_FORMAT_L_LATC1_SNORM: return GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT; - case MESA_FORMAT_LA_LATC2: + case MESA_FORMAT_LA_LATC2_UNORM: return GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT; - case MESA_FORMAT_SIGNED_LA_LATC2: + case MESA_FORMAT_LA_LATC2_SNORM: return GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT; case MESA_FORMAT_ETC1_RGB8: return GL_ETC1_RGB8_OES; + case MESA_FORMAT_ETC2_RGB8: + return GL_COMPRESSED_RGB8_ETC2; + case MESA_FORMAT_ETC2_SRGB8: + return GL_COMPRESSED_SRGB8_ETC2; + case MESA_FORMAT_ETC2_RGBA8_EAC: + return GL_COMPRESSED_RGBA8_ETC2_EAC; + case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC: + return GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC; + case MESA_FORMAT_ETC2_R11_EAC: + return GL_COMPRESSED_R11_EAC; + case MESA_FORMAT_ETC2_RG11_EAC: + return GL_COMPRESSED_RG11_EAC; + case MESA_FORMAT_ETC2_SIGNED_R11_EAC: + return GL_COMPRESSED_SIGNED_R11_EAC; + case MESA_FORMAT_ETC2_SIGNED_RG11_EAC: + return GL_COMPRESSED_SIGNED_RG11_EAC; + case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1: + return GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2; + case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: + return GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2; + + case MESA_FORMAT_BPTC_RGBA_UNORM: + return GL_COMPRESSED_RGBA_BPTC_UNORM; + case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM: + return GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM; + case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT: + return GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT; + case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT: + return GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT; default: _mesa_problem(ctx, "Unexpected mesa texture format in" @@ -443,7 +559,7 @@ _mesa_compressed_format_to_glenum(struct gl_context *ctx, GLuint mesaFormat) */ GLubyte * _mesa_compressed_image_address(GLint col, GLint row, GLint img, - gl_format mesaFormat, + mesa_format mesaFormat, GLsizei width, const GLubyte *image) { /* XXX only 2D images implemented, not 3D */ @@ -453,8 +569,8 @@ _mesa_compressed_image_address(GLint col, GLint row, GLint img, _mesa_get_format_block_size(mesaFormat, &bw, &bh); - ASSERT(col % bw == 0); - ASSERT(row % bh == 0); + assert(col % bw == 0); + assert(row % bh == 0); offset = ((width + bw - 1) / bw) * (row / bh) + col / bw; offset *= blockSize; @@ -464,87 +580,76 @@ _mesa_compressed_image_address(GLint col, GLint row, GLint img, /** - * Decompress a compressed texture image, returning a GL_RGBA/GL_FLOAT image. + * Return a texel-fetch function for the given format, or NULL if + * invalid format. */ -void -_mesa_decompress_image(gl_format format, GLuint width, GLuint height, - const GLubyte *src, GLint srcRowStride, - GLfloat *dest) +compressed_fetch_func +_mesa_get_compressed_fetch_func(mesa_format format) { - void (*fetch)(const struct swrast_texture_image *texImage, - GLint i, GLint j, GLint k, GLfloat *texel); - struct swrast_texture_image texImage; /* dummy teximage */ - GLuint i, j; - - /* setup dummy texture image info */ - memset(&texImage, 0, sizeof(texImage)); - texImage.Data = (void *) src; - texImage.RowStride = srcRowStride; - switch (format) { - /* DXT formats */ case MESA_FORMAT_RGB_DXT1: - fetch = _mesa_fetch_texel_2d_f_rgb_dxt1; - break; case MESA_FORMAT_RGBA_DXT1: - fetch = _mesa_fetch_texel_2d_f_rgba_dxt1; - break; case MESA_FORMAT_RGBA_DXT3: - fetch = _mesa_fetch_texel_2d_f_rgba_dxt3; - break; case MESA_FORMAT_RGBA_DXT5: - fetch = _mesa_fetch_texel_2d_f_rgba_dxt5; - break; - - /* FXT1 formats */ + case MESA_FORMAT_SRGB_DXT1: + case MESA_FORMAT_SRGBA_DXT1: + case MESA_FORMAT_SRGBA_DXT3: + case MESA_FORMAT_SRGBA_DXT5: + return _mesa_get_dxt_fetch_func(format); case MESA_FORMAT_RGB_FXT1: - fetch = _mesa_fetch_texel_2d_f_rgb_fxt1; - break; case MESA_FORMAT_RGBA_FXT1: - fetch = _mesa_fetch_texel_2d_f_rgba_fxt1; - break; - - /* Red/RG formats */ - case MESA_FORMAT_RED_RGTC1: - fetch = _mesa_fetch_texel_2d_f_red_rgtc1; - break; - case MESA_FORMAT_SIGNED_RED_RGTC1: - fetch = _mesa_fetch_texel_2d_f_signed_red_rgtc1; - break; - case MESA_FORMAT_RG_RGTC2: - fetch = _mesa_fetch_texel_2d_f_rg_rgtc2; - break; - case MESA_FORMAT_SIGNED_RG_RGTC2: - fetch = _mesa_fetch_texel_2d_f_signed_rg_rgtc2; - break; - - /* L/LA formats */ - case MESA_FORMAT_L_LATC1: - fetch = _mesa_fetch_texel_2d_f_l_latc1; - break; - case MESA_FORMAT_SIGNED_L_LATC1: - fetch = _mesa_fetch_texel_2d_f_signed_l_latc1; - break; - case MESA_FORMAT_LA_LATC2: - fetch = _mesa_fetch_texel_2d_f_la_latc2; - break; - case MESA_FORMAT_SIGNED_LA_LATC2: - fetch = _mesa_fetch_texel_2d_f_signed_la_latc2; - break; - - /* ETC1 formats */ + return _mesa_get_fxt_fetch_func(format); + case MESA_FORMAT_R_RGTC1_UNORM: + case MESA_FORMAT_L_LATC1_UNORM: + case MESA_FORMAT_R_RGTC1_SNORM: + case MESA_FORMAT_L_LATC1_SNORM: + case MESA_FORMAT_RG_RGTC2_UNORM: + case MESA_FORMAT_LA_LATC2_UNORM: + case MESA_FORMAT_RG_RGTC2_SNORM: + case MESA_FORMAT_LA_LATC2_SNORM: + return _mesa_get_compressed_rgtc_func(format); case MESA_FORMAT_ETC1_RGB8: - fetch = _mesa_fetch_texel_2d_f_etc1_rgb8; - break; - + return _mesa_get_etc_fetch_func(format); + case MESA_FORMAT_BPTC_RGBA_UNORM: + case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM: + case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT: + case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT: + return _mesa_get_bptc_fetch_func(format); default: + return NULL; + } +} + + +/** + * Decompress a compressed texture image, returning a GL_RGBA/GL_FLOAT image. + * \param srcRowStride stride in bytes between rows of blocks in the + * compressed source image. + */ +void +_mesa_decompress_image(mesa_format format, GLuint width, GLuint height, + const GLubyte *src, GLint srcRowStride, + GLfloat *dest) +{ + compressed_fetch_func fetch; + GLuint i, j; + GLuint bytes, bw, bh; + GLint stride; + + bytes = _mesa_get_format_bytes(format); + _mesa_get_format_block_size(format, &bw, &bh); + + fetch = _mesa_get_compressed_fetch_func(format); + if (!fetch) { _mesa_problem(NULL, "Unexpected format in _mesa_decompress_image()"); return; } + + stride = srcRowStride * bh / bytes; for (j = 0; j < height; j++) { for (i = 0; i < width; i++) { - fetch(&texImage, i, j, 0, dest); + fetch(src, stride, i, j, dest); dest += 4; } }