diff options
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/main/texcompress_s3tc.c')
| -rw-r--r-- | nx-X11/extras/Mesa/src/mesa/main/texcompress_s3tc.c | 555 |
1 files changed, 555 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/main/texcompress_s3tc.c b/nx-X11/extras/Mesa/src/mesa/main/texcompress_s3tc.c new file mode 100644 index 000000000..44ab9e2ac --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/main/texcompress_s3tc.c @@ -0,0 +1,555 @@ +/* + * 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. + */ + +#ifndef USE_EXTERNAL_DXTN_LIB +#define USE_EXTERNAL_DXTN_LIB 0 +#endif + +#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" + +#if USE_EXTERNAL_DXTN_LIB +#ifdef __MINGW32__ +/* no dlopen */ +#define DXTN_EXT "dxtn.dll" +#define DXTN_PREFIX "" +#define dlopen(name, mode) LoadLibrary(name) +#define dlsym(hndl, proc) GetProcAddress(hndl, proc) +#define dlclose(hndl) FreeLibrary(hndl) +#elif defined(__DJGPP__) +/* has dlopen, but doesn't like the names */ +#include <dlfcn.h> +#define DXTN_EXT "dxtn.dxe" +#define DXTN_PREFIX "_" +#else +/* happiness */ +#include <dlfcn.h> +#define DXTN_EXT "libtxc_dxtn.so" +#define DXTN_PREFIX "" +#endif +#endif /* USE_EXTERNAL_DXTN_LIB */ + +typedef void (*dxtFetchTexelFuncExt)( GLint srcRowstride, GLubyte *pixdata, GLint col, GLint row, GLvoid *texelOut ); +dxtFetchTexelFuncExt fetch_ext_rgb_dxt1 = NULL; +dxtFetchTexelFuncExt fetch_ext_rgba_dxt1 = NULL; +dxtFetchTexelFuncExt fetch_ext_rgba_dxt3 = NULL; +dxtFetchTexelFuncExt fetch_ext_rgba_dxt5 = NULL; + +typedef void (*dxtCompressTexFuncExt)(GLint srccomps, GLint width, GLint height, const GLubyte *srcPixData, GLenum destformat, GLubyte *dest, GLint dstRowStride); +dxtCompressTexFuncExt ext_tx_compress_dxtn = NULL; + +void *dxtlibhandle = NULL; + +void +_mesa_init_texture_s3tc( GLcontext *ctx ) +{ + /* called during context initialization */ + ctx->Mesa_DXTn = GL_FALSE; +#if USE_EXTERNAL_DXTN_LIB + if (!dxtlibhandle) { + dxtlibhandle = dlopen (DXTN_EXT, RTLD_LAZY | RTLD_GLOBAL); + if (!dxtlibhandle) { + _mesa_warning(ctx, "couldn't open " DXTN_EXT ", software DXTn " + "compression/decompression unavailable\n"); + } + else { + /* the fetch functions are not per context! Might be problematic... */ + fetch_ext_rgb_dxt1 = (dxtFetchTexelFuncExt)dlsym(dxtlibhandle, DXTN_PREFIX "fetch_2d_texel_rgb_dxt1"); + if (fetch_ext_rgb_dxt1 != NULL) { + fetch_ext_rgba_dxt1 = (dxtFetchTexelFuncExt)dlsym(dxtlibhandle, DXTN_PREFIX "fetch_2d_texel_rgba_dxt1"); + } + if (fetch_ext_rgba_dxt1 != NULL) { + fetch_ext_rgba_dxt3 = (dxtFetchTexelFuncExt)dlsym(dxtlibhandle, DXTN_PREFIX "fetch_2d_texel_rgba_dxt3"); + } + if (fetch_ext_rgba_dxt3 != NULL) { + fetch_ext_rgba_dxt5 = (dxtFetchTexelFuncExt)dlsym(dxtlibhandle, DXTN_PREFIX "fetch_2d_texel_rgba_dxt5"); + } + if (fetch_ext_rgba_dxt5 != NULL) { + ext_tx_compress_dxtn = (dxtCompressTexFuncExt)dlsym(dxtlibhandle, DXTN_PREFIX "tx_compress_dxtn"); + } + + if (ext_tx_compress_dxtn == NULL) { + _mesa_warning(ctx, "couldn't reference all symbols in " + DXTN_EXT ", software DXTn compression/decompression " + "unavailable\n"); + fetch_ext_rgb_dxt1 = NULL; + fetch_ext_rgba_dxt1 = NULL; + fetch_ext_rgba_dxt3 = NULL; + fetch_ext_rgba_dxt5 = NULL; + ext_tx_compress_dxtn = NULL; + dlclose(dxtlibhandle); + dxtlibhandle = NULL; + } + } + } + if (dxtlibhandle) { + ctx->Mesa_DXTn = GL_TRUE; + _mesa_warning(ctx, "software DXTn compression/decompression available\n"); + } +#else + (void) ctx; +#endif +} + +/** + * 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 (ext_tx_compress_dxtn) { + (*ext_tx_compress_dxtn)(3, srcWidth, srcHeight, pixels, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, dst, dstRowStride); + } + else { + _mesa_problem(ctx, "external dxt library not available"); + } + + 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 (ext_tx_compress_dxtn) { + (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, dst, dstRowStride); + } + else { + _mesa_problem(ctx, "external dxt library not available"); + } + + 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 (ext_tx_compress_dxtn) { + (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, dst, dstRowStride); + } + else { + _mesa_problem(ctx, "external dxt library not available"); + } + + 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 (ext_tx_compress_dxtn) { + (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, dst, dstRowStride); + } + else { + _mesa_problem(ctx, "external dxt library not available"); + } + + 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) k; + if (fetch_ext_rgb_dxt1) { + ASSERT (sizeof(GLchan) == sizeof(GLubyte)); + (*fetch_ext_rgb_dxt1)((texImage)->RowStride, (GLubyte *)(texImage)->Data, i, j, texel); + } + else _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n"); +} + + +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) k; + if (fetch_ext_rgba_dxt1) { + (*fetch_ext_rgba_dxt1)((texImage)->RowStride, (GLubyte *)(texImage)->Data, i, j, texel); + } + else _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n"); +} + + +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) k; + if (fetch_ext_rgba_dxt3) { + ASSERT (sizeof(GLchan) == sizeof(GLubyte)); + (*fetch_ext_rgba_dxt3)((texImage)->RowStride, (GLubyte *)(texImage)->Data, i, j, texel); + } + else _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n"); +} + + +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) k; + if (fetch_ext_rgba_dxt5) { + (*fetch_ext_rgba_dxt5)((texImage)->RowStride, (GLubyte *)(texImage)->Data, i, j, texel); + } + else _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n"); +} + + +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 */ +}; |