/* * Mesa 3-D graphics library * Version: 6.1 * * Copyright (C) 1999-2004 Brian Paul All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /** * \file texcompress_s3tc.c * GL_EXT_texture_compression_s3tc support. */ #include "glheader.h" #include "imports.h" #include "colormac.h" #include "context.h" #include "convolve.h" #include "image.h" #include "texcompress.h" #include "texformat.h" #include "texstore.h" void _mesa_init_texture_s3tc( GLcontext *ctx ) { /* called during context initialization */ (void) ctx; } /** * Called via TexFormat->StoreImage to store an RGB_DXT1 texture. */ static GLboolean texstore_rgb_dxt1(STORE_PARAMS) { const GLchan *pixels; GLint srcRowStride; GLubyte *dst; const GLint texWidth = dstRowStride * 4 / 8; /* a bit of a hack */ const GLchan *tempImage = NULL; ASSERT(dstFormat == &_mesa_texformat_rgb_dxt1); ASSERT(dstXoffset % 4 == 0); ASSERT(dstYoffset % 4 == 0); ASSERT(dstZoffset % 4 == 0); (void) dstZoffset; (void) dstImageStride; if (srcFormat != GL_RGB || srcType != CHAN_TYPE || ctx->_ImageTransferState || srcPacking->SwapBytes) { /* convert image to RGB/GLchan */ tempImage = _mesa_make_temp_chan_image(ctx, dims, baseInternalFormat, dstFormat->BaseFormat, srcWidth, srcHeight, srcDepth, srcFormat, srcType, srcAddr, srcPacking); if (!tempImage) return GL_FALSE; /* out of memory */ _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight); pixels = tempImage; srcRowStride = 3 * srcWidth; srcFormat = GL_RGB; } else { pixels = (const GLchan *) srcAddr; srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType) / sizeof(GLchan); } dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, texWidth, (GLubyte *) dstAddr); #if 0 compress_dxt1(ctx, srcWidth, srcHeight, srcFormat, pixels, srcRowStride, dst, dstRowStride); #endif if (tempImage) _mesa_free((void *) tempImage); return GL_TRUE; } /** * Called via TexFormat->StoreImage to store an RGBA_DXT1 texture. */ static GLboolean texstore_rgba_dxt1(STORE_PARAMS) { const GLchan *pixels; GLint srcRowStride; GLubyte *dst; const GLint texWidth = dstRowStride * 4 / 8; /* a bit of a hack */ const GLchan *tempImage = NULL; ASSERT(dstFormat == &_mesa_texformat_rgba_dxt1); ASSERT(dstXoffset % 4 == 0); ASSERT(dstYoffset % 4 == 0); ASSERT(dstZoffset % 4 == 0); (void) dstZoffset; (void) dstImageStride; if (srcFormat != GL_RGBA || srcType != CHAN_TYPE || ctx->_ImageTransferState || srcPacking->SwapBytes) { /* convert image to RGBA/GLchan */ tempImage = _mesa_make_temp_chan_image(ctx, dims, baseInternalFormat, dstFormat->BaseFormat, srcWidth, srcHeight, srcDepth, srcFormat, srcType, srcAddr, srcPacking); if (!tempImage) return GL_FALSE; /* out of memory */ _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight); pixels = tempImage; srcRowStride = 4 * srcWidth; srcFormat = GL_RGBA; } else { pixels = (const GLchan *) srcAddr; srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType) / sizeof(GLchan); } dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, texWidth, (GLubyte *) dstAddr); #if 0 compress_dxt1(ctx, srcWidth, srcHeight, srcFormat, pixels, srcRowStride, dst, dstRowStride); #endif if (tempImage) _mesa_free((void*) tempImage); return GL_TRUE; } /** * Called via TexFormat->StoreImage to store an RGBA_DXT3 texture. */ static GLboolean texstore_rgba_dxt3(STORE_PARAMS) { const GLchan *pixels; GLint srcRowStride; GLubyte *dst; const GLint texWidth = dstRowStride * 4 / 16; /* a bit of a hack */ const GLchan *tempImage = NULL; ASSERT(dstFormat == &_mesa_texformat_rgba_dxt3); ASSERT(dstXoffset % 4 == 0); ASSERT(dstYoffset % 4 == 0); ASSERT(dstZoffset % 4 == 0); (void) dstZoffset; (void) dstImageStride; if (srcFormat != GL_RGBA || srcType != CHAN_TYPE || ctx->_ImageTransferState || srcPacking->SwapBytes) { /* convert image to RGBA/GLchan */ tempImage = _mesa_make_temp_chan_image(ctx, dims, baseInternalFormat, dstFormat->BaseFormat, srcWidth, srcHeight, srcDepth, srcFormat, srcType, srcAddr, srcPacking); if (!tempImage) return GL_FALSE; /* out of memory */ _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight); pixels = tempImage; srcRowStride = 4 * srcWidth; } else { pixels = (const GLchan *) srcAddr; srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType) / sizeof(GLchan); } dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, texWidth, (GLubyte *) dstAddr); #if 0 compress_rgba_dxt3(ctx, srcWidth, srcHeight, pixels, srcRowStride, dst, dstRowStride); #endif if (tempImage) _mesa_free((void *) tempImage); return GL_TRUE; } /** * Called via TexFormat->StoreImage to store an RGBA_DXT5 texture. */ static GLboolean texstore_rgba_dxt5(STORE_PARAMS) { const GLchan *pixels; GLint srcRowStride; GLubyte *dst; const GLint texWidth = dstRowStride * 4 / 16; /* a bit of a hack */ const GLchan *tempImage = NULL; ASSERT(dstFormat == &_mesa_texformat_rgba_dxt5); ASSERT(dstXoffset % 4 == 0); ASSERT(dstYoffset % 4 == 0); ASSERT(dstZoffset % 4 == 0); (void) dstZoffset; (void) dstImageStride; if (srcFormat != GL_RGBA || srcType != CHAN_TYPE || ctx->_ImageTransferState || srcPacking->SwapBytes) { /* convert image to RGBA/GLchan */ tempImage = _mesa_make_temp_chan_image(ctx, dims, baseInternalFormat, dstFormat->BaseFormat, srcWidth, srcHeight, srcDepth, srcFormat, srcType, srcAddr, srcPacking); if (!tempImage) return GL_FALSE; /* out of memory */ _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight); pixels = tempImage; srcRowStride = 4 * srcWidth; } else { pixels = (const GLchan *) srcAddr; srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType) / sizeof(GLchan); } dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, texWidth, (GLubyte *) dstAddr); #if 0 compress_rgba_dxt5(ctx, srcWidth, srcHeight, pixels, srcRowStride, dst, dstRowStride); #endif if (tempImage) _mesa_free((void *) tempImage); return GL_TRUE; } static void fetch_texel_2d_rgb_dxt1( const struct gl_texture_image *texImage, GLint i, GLint j, GLint k, GLchan *texel ) { (void) texImage; (void) i; (void) j; (void) k; (void) texel; } static void fetch_texel_2d_f_rgb_dxt1( const struct gl_texture_image *texImage, GLint i, GLint j, GLint k, GLfloat *texel ) { /* just sample as GLchan and convert to float here */ GLchan rgba[4]; fetch_texel_2d_rgb_dxt1(texImage, i, j, k, rgba); texel[RCOMP] = CHAN_TO_FLOAT(rgba[RCOMP]); texel[GCOMP] = CHAN_TO_FLOAT(rgba[GCOMP]); texel[BCOMP] = CHAN_TO_FLOAT(rgba[BCOMP]); texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); } static void fetch_texel_2d_rgba_dxt1( const struct gl_texture_image *texImage, GLint i, GLint j, GLint k, GLchan *texel ) { (void) texImage; (void) i; (void) j; (void) k; (void) texel; } static void fetch_texel_2d_f_rgba_dxt1( const struct gl_texture_image *texImage, GLint i, GLint j, GLint k, GLfloat *texel ) { /* just sample as GLchan and convert to float here */ GLchan rgba[4]; fetch_texel_2d_rgba_dxt1(texImage, i, j, k, rgba); texel[RCOMP] = CHAN_TO_FLOAT(rgba[RCOMP]); texel[GCOMP] = CHAN_TO_FLOAT(rgba[GCOMP]); texel[BCOMP] = CHAN_TO_FLOAT(rgba[BCOMP]); texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); } static void fetch_texel_2d_rgba_dxt3( const struct gl_texture_image *texImage, GLint i, GLint j, GLint k, GLchan *texel ) { (void) texImage; (void) i; (void) j; (void) k; (void) texel; } static void fetch_texel_2d_f_rgba_dxt3( const struct gl_texture_image *texImage, GLint i, GLint j, GLint k, GLfloat *texel ) { /* just sample as GLchan and convert to float here */ GLchan rgba[4]; fetch_texel_2d_rgba_dxt3(texImage, i, j, k, rgba); texel[RCOMP] = CHAN_TO_FLOAT(rgba[RCOMP]); texel[GCOMP] = CHAN_TO_FLOAT(rgba[GCOMP]); texel[BCOMP] = CHAN_TO_FLOAT(rgba[BCOMP]); texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); } static void fetch_texel_2d_rgba_dxt5( const struct gl_texture_image *texImage, GLint i, GLint j, GLint k, GLchan *texel ) { (void) texImage; (void) i; (void) j; (void) k; (void) texel; } static void fetch_texel_2d_f_rgba_dxt5( const struct gl_texture_image *texImage, GLint i, GLint j, GLint k, GLfloat *texel ) { /* just sample as GLchan and convert to float here */ GLchan rgba[4]; fetch_texel_2d_rgba_dxt5(texImage, i, j, k, rgba); texel[RCOMP] = CHAN_TO_FLOAT(rgba[RCOMP]); texel[GCOMP] = CHAN_TO_FLOAT(rgba[GCOMP]); texel[BCOMP] = CHAN_TO_FLOAT(rgba[BCOMP]); texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); } const struct gl_texture_format _mesa_texformat_rgb_dxt1 = { MESA_FORMAT_RGB_DXT1, /* MesaFormat */ GL_RGB, /* BaseFormat */ GL_UNSIGNED_NORMALIZED_ARB, /* DataType */ 4, /*approx*/ /* RedBits */ 4, /*approx*/ /* GreenBits */ 4, /*approx*/ /* BlueBits */ 0, /* AlphaBits */ 0, /* LuminanceBits */ 0, /* IntensityBits */ 0, /* IndexBits */ 0, /* DepthBits */ 0, /* TexelBytes */ texstore_rgb_dxt1, /* StoreTexImageFunc */ NULL, /*impossible*/ /* FetchTexel1D */ fetch_texel_2d_rgb_dxt1, /* FetchTexel2D */ NULL, /*impossible*/ /* FetchTexel3D */ NULL, /*impossible*/ /* FetchTexel1Df */ fetch_texel_2d_f_rgb_dxt1, /* FetchTexel2Df */ NULL, /*impossible*/ /* FetchTexel3Df */ }; const struct gl_texture_format _mesa_texformat_rgba_dxt1 = { MESA_FORMAT_RGBA_DXT1, /* MesaFormat */ GL_RGBA, /* BaseFormat */ GL_UNSIGNED_NORMALIZED_ARB, /* DataType */ 4, /*approx*/ /* RedBits */ 4, /*approx*/ /* GreenBits */ 4, /*approx*/ /* BlueBits */ 1, /*approx*/ /* AlphaBits */ 0, /* LuminanceBits */ 0, /* IntensityBits */ 0, /* IndexBits */ 0, /* DepthBits */ 0, /* TexelBytes */ texstore_rgba_dxt1, /* StoreTexImageFunc */ NULL, /*impossible*/ /* FetchTexel1D */ fetch_texel_2d_rgba_dxt1, /* FetchTexel2D */ NULL, /*impossible*/ /* FetchTexel3D */ NULL, /*impossible*/ /* FetchTexel1Df */ fetch_texel_2d_f_rgba_dxt1, /* FetchTexel2Df */ NULL, /*impossible*/ /* FetchTexel3Df */ }; const struct gl_texture_format _mesa_texformat_rgba_dxt3 = { MESA_FORMAT_RGBA_DXT3, /* MesaFormat */ GL_RGBA, /* BaseFormat */ GL_UNSIGNED_NORMALIZED_ARB, /* DataType */ 4, /*approx*/ /* RedBits */ 4, /*approx*/ /* GreenBits */ 4, /*approx*/ /* BlueBits */ 4, /*approx*/ /* AlphaBits */ 0, /* LuminanceBits */ 0, /* IntensityBits */ 0, /* IndexBits */ 0, /* DepthBits */ 0, /* TexelBytes */ texstore_rgba_dxt3, /* StoreTexImageFunc */ NULL, /*impossible*/ /* FetchTexel1D */ fetch_texel_2d_rgba_dxt3, /* FetchTexel2D */ NULL, /*impossible*/ /* FetchTexel3D */ NULL, /*impossible*/ /* FetchTexel1Df */ fetch_texel_2d_f_rgba_dxt3, /* FetchTexel2Df */ NULL, /*impossible*/ /* FetchTexel3Df */ }; const struct gl_texture_format _mesa_texformat_rgba_dxt5 = { MESA_FORMAT_RGBA_DXT5, /* MesaFormat */ GL_RGBA, /* BaseFormat */ GL_UNSIGNED_NORMALIZED_ARB, /* DataType */ 4,/*approx*/ /* RedBits */ 4,/*approx*/ /* GreenBits */ 4,/*approx*/ /* BlueBits */ 4,/*approx*/ /* AlphaBits */ 0, /* LuminanceBits */ 0, /* IntensityBits */ 0, /* IndexBits */ 0, /* DepthBits */ 0, /* TexelBytes */ texstore_rgba_dxt5, /* StoreTexImageFunc */ NULL, /*impossible*/ /* FetchTexel1D */ fetch_texel_2d_rgba_dxt5, /* FetchTexel2D */ NULL, /*impossible*/ /* FetchTexel3D */ NULL, /*impossible*/ /* FetchTexel1Df */ fetch_texel_2d_f_rgba_dxt5, /* FetchTexel2Df */ NULL, /*impossible*/ /* FetchTexel3Df */ };