diff options
Diffstat (limited to 'src/mesa/main/texcompress_s3tc.c')
| -rw-r--r-- | src/mesa/main/texcompress_s3tc.c | 238 |
1 files changed, 215 insertions, 23 deletions
diff --git a/src/mesa/main/texcompress_s3tc.c b/src/mesa/main/texcompress_s3tc.c index a19c161b2c..754cb33cc0 100644 --- a/src/mesa/main/texcompress_s3tc.c +++ b/src/mesa/main/texcompress_s3tc.c @@ -3,6 +3,7 @@ * Version: 6.5.3 * * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. + * Copyright (c) 2008 VMware, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), @@ -54,6 +55,38 @@ #endif +#if FEATURE_texture_s3tc + + +#if FEATURE_EXT_texture_sRGB +/** + * Convert an 8-bit sRGB value from non-linear space to a + * linear RGB value in [0, 1]. + * Implemented with a 256-entry lookup table. + */ +static INLINE GLfloat +nonlinear_to_linear(GLubyte cs8) +{ + static GLfloat table[256]; + static GLboolean tableReady = GL_FALSE; + if (!tableReady) { + /* compute lookup table now */ + GLuint i; + for (i = 0; i < 256; i++) { + const GLfloat cs = UBYTE_TO_FLOAT(i); + if (cs <= 0.04045) { + table[i] = cs / 12.92f; + } + else { + table[i] = (GLfloat) _mesa_pow((cs + 0.055) / 1.055, 2.4); + } + } + tableReady = GL_TRUE; + } + return table[cs8]; +} +#endif /* FEATURE_EXT_texture_sRGB */ + typedef void (*dxtFetchTexelFuncExt)( GLint srcRowstride, GLubyte *pixdata, GLint col, GLint row, GLvoid *texelOut ); dxtFetchTexelFuncExt fetch_ext_rgb_dxt1 = NULL; @@ -176,7 +209,7 @@ texstore_rgb_dxt1(TEXSTORE_PARAMS) dst, dstRowStride); } else { - _mesa_warning(ctx, "external dxt library not available"); + _mesa_warning(ctx, "external dxt library not available: texstore_rgb_dxt1"); } if (tempImage) @@ -238,7 +271,7 @@ texstore_rgba_dxt1(TEXSTORE_PARAMS) dst, dstRowStride); } else { - _mesa_warning(ctx, "external dxt library not available"); + _mesa_warning(ctx, "external dxt library not available: texstore_rgba_dxt1"); } if (tempImage) @@ -299,7 +332,7 @@ texstore_rgba_dxt3(TEXSTORE_PARAMS) dst, dstRowStride); } else { - _mesa_warning(ctx, "external dxt library not available"); + _mesa_warning(ctx, "external dxt library not available: texstore_rgba_dxt3"); } if (tempImage) @@ -360,7 +393,7 @@ texstore_rgba_dxt5(TEXSTORE_PARAMS) dst, dstRowStride); } else { - _mesa_warning(ctx, "external dxt library not available"); + _mesa_warning(ctx, "external dxt library not available: texstore_rgba_dxt5"); } if (tempImage) @@ -381,7 +414,7 @@ fetch_texel_2d_rgb_dxt1( const struct gl_texture_image *texImage, (GLubyte *)(texImage)->Data, i, j, texel); } else - _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n"); + _mesa_debug(NULL, "attempted to decode s3tc texture without library available: fetch_texel_2d_rgb_dxt1"); } @@ -409,7 +442,7 @@ fetch_texel_2d_rgba_dxt1( const struct gl_texture_image *texImage, (GLubyte *)(texImage)->Data, i, j, texel); } else - _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n"); + _mesa_debug(NULL, "attempted to decode s3tc texture without library available: fetch_texel_2d_rgba_dxt1\n"); } @@ -438,7 +471,7 @@ fetch_texel_2d_rgba_dxt3( const struct gl_texture_image *texImage, i, j, texel); } else - _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n"); + _mesa_debug(NULL, "attempted to decode s3tc texture without library available: fetch_texel_2d_rgba_dxt3\n"); } @@ -466,7 +499,7 @@ fetch_texel_2d_rgba_dxt5( const struct gl_texture_image *texImage, i, j, texel); } else - _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n"); + _mesa_debug(NULL, "attempted to decode s3tc texture without library available: fetch_texel_2d_rgba_dxt5\n"); } @@ -483,6 +516,73 @@ fetch_texel_2d_f_rgba_dxt5( const struct gl_texture_image *texImage, texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); } +#if FEATURE_EXT_texture_sRGB +static void +fetch_texel_2d_f_srgb_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] = nonlinear_to_linear(rgba[RCOMP]); + texel[GCOMP] = nonlinear_to_linear(rgba[GCOMP]); + texel[BCOMP] = nonlinear_to_linear(rgba[BCOMP]); + texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); +} + +static void +fetch_texel_2d_f_srgba_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] = nonlinear_to_linear(rgba[RCOMP]); + texel[GCOMP] = nonlinear_to_linear(rgba[GCOMP]); + texel[BCOMP] = nonlinear_to_linear(rgba[BCOMP]); + texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); +} + +static void +fetch_texel_2d_f_srgba_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] = nonlinear_to_linear(rgba[RCOMP]); + texel[GCOMP] = nonlinear_to_linear(rgba[GCOMP]); + texel[BCOMP] = nonlinear_to_linear(rgba[BCOMP]); + texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); +} + +static void +fetch_texel_2d_f_srgba_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] = nonlinear_to_linear(rgba[RCOMP]); + texel[GCOMP] = nonlinear_to_linear(rgba[GCOMP]); + texel[BCOMP] = nonlinear_to_linear(rgba[BCOMP]); + texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); +} +#endif /* FEATURE_EXT_texture_sRGB */ + + +#else /* FEATURE_texture_s3tc */ + + +void +_mesa_init_texture_s3tc( GLcontext *ctx ) +{ + (void) ctx; +} + + +#endif /* FEATURE_texture_s3tc */ + const struct gl_texture_format _mesa_texformat_rgb_dxt1 = { MESA_FORMAT_RGB_DXT1, /* MesaFormat */ @@ -498,6 +598,7 @@ const struct gl_texture_format _mesa_texformat_rgb_dxt1 = { 0, /* DepthBits */ 0, /* StencilBits */ 0, /* TexelBytes */ +#if FEATURE_texture_s3tc texstore_rgb_dxt1, /* StoreTexImageFunc */ NULL, /*impossible*/ /* FetchTexel1D */ fetch_texel_2d_rgb_dxt1, /* FetchTexel2D */ @@ -506,6 +607,97 @@ const struct gl_texture_format _mesa_texformat_rgb_dxt1 = { fetch_texel_2d_f_rgb_dxt1, /* FetchTexel2Df */ NULL, /*impossible*/ /* FetchTexel3Df */ NULL /* StoreTexel */ +#else + _mesa_texstore_null, + _MESA_TEXFORMAT_NULL_OPS +#endif +}; + +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, /* StencilBits */ + 0, /* TexelBytes */ +#if FEATURE_texture_s3tc + 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 */ + NULL /* StoreTexel */ +#else + _mesa_texstore_null, + _MESA_TEXFORMAT_NULL_OPS +#endif +}; + +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, /* StencilBits */ + 0, /* TexelBytes */ +#if FEATURE_texture_s3tc + 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 */ + NULL /* StoreTexel */ +#else + _mesa_texstore_null, + _MESA_TEXFORMAT_NULL_OPS +#endif +}; + +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, /* StencilBits */ + 0, /* TexelBytes */ +#if FEATURE_texture_s3tc + 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 */ + NULL /* StoreTexel */ +#else + _mesa_texstore_null, + _MESA_TEXFORMAT_NULL_OPS +#endif }; #if FEATURE_EXT_texture_sRGB @@ -525,17 +717,16 @@ const struct gl_texture_format _mesa_texformat_srgb_dxt1 = { 0, /* TexelBytes */ texstore_rgb_dxt1, /* StoreTexImageFunc */ NULL, /*impossible*/ /* FetchTexel1D */ - fetch_texel_2d_rgb_dxt1, /* FetchTexel2D */ + NULL, /* FetchTexel2D */ NULL, /*impossible*/ /* FetchTexel3D */ NULL, /*impossible*/ /* FetchTexel1Df */ - fetch_texel_2d_f_rgb_dxt1, /* FetchTexel2Df */ + fetch_texel_2d_f_srgb_dxt1, /* FetchTexel2Df */ NULL, /*impossible*/ /* FetchTexel3Df */ NULL /* StoreTexel */ }; -#endif -const struct gl_texture_format _mesa_texformat_rgba_dxt1 = { - MESA_FORMAT_RGBA_DXT1, /* MesaFormat */ +const struct gl_texture_format _mesa_texformat_srgba_dxt1 = { + MESA_FORMAT_SRGBA_DXT1, /* MesaFormat */ GL_RGBA, /* BaseFormat */ GL_UNSIGNED_NORMALIZED_ARB, /* DataType */ 4, /*approx*/ /* RedBits */ @@ -550,16 +741,16 @@ const struct gl_texture_format _mesa_texformat_rgba_dxt1 = { 0, /* TexelBytes */ texstore_rgba_dxt1, /* StoreTexImageFunc */ NULL, /*impossible*/ /* FetchTexel1D */ - fetch_texel_2d_rgba_dxt1, /* FetchTexel2D */ + NULL, /* FetchTexel2D */ NULL, /*impossible*/ /* FetchTexel3D */ NULL, /*impossible*/ /* FetchTexel1Df */ - fetch_texel_2d_f_rgba_dxt1, /* FetchTexel2Df */ + fetch_texel_2d_f_srgba_dxt1, /* FetchTexel2Df */ NULL, /*impossible*/ /* FetchTexel3Df */ NULL /* StoreTexel */ }; -const struct gl_texture_format _mesa_texformat_rgba_dxt3 = { - MESA_FORMAT_RGBA_DXT3, /* MesaFormat */ +const struct gl_texture_format _mesa_texformat_srgba_dxt3 = { + MESA_FORMAT_SRGBA_DXT3, /* MesaFormat */ GL_RGBA, /* BaseFormat */ GL_UNSIGNED_NORMALIZED_ARB, /* DataType */ 4, /*approx*/ /* RedBits */ @@ -574,16 +765,16 @@ const struct gl_texture_format _mesa_texformat_rgba_dxt3 = { 0, /* TexelBytes */ texstore_rgba_dxt3, /* StoreTexImageFunc */ NULL, /*impossible*/ /* FetchTexel1D */ - fetch_texel_2d_rgba_dxt3, /* FetchTexel2D */ + NULL, /* FetchTexel2D */ NULL, /*impossible*/ /* FetchTexel3D */ NULL, /*impossible*/ /* FetchTexel1Df */ - fetch_texel_2d_f_rgba_dxt3, /* FetchTexel2Df */ + fetch_texel_2d_f_srgba_dxt3, /* FetchTexel2Df */ NULL, /*impossible*/ /* FetchTexel3Df */ NULL /* StoreTexel */ }; -const struct gl_texture_format _mesa_texformat_rgba_dxt5 = { - MESA_FORMAT_RGBA_DXT5, /* MesaFormat */ +const struct gl_texture_format _mesa_texformat_srgba_dxt5 = { + MESA_FORMAT_SRGBA_DXT5, /* MesaFormat */ GL_RGBA, /* BaseFormat */ GL_UNSIGNED_NORMALIZED_ARB, /* DataType */ 4,/*approx*/ /* RedBits */ @@ -598,10 +789,11 @@ const struct gl_texture_format _mesa_texformat_rgba_dxt5 = { 0, /* TexelBytes */ texstore_rgba_dxt5, /* StoreTexImageFunc */ NULL, /*impossible*/ /* FetchTexel1D */ - fetch_texel_2d_rgba_dxt5, /* FetchTexel2D */ + NULL, /* FetchTexel2D */ NULL, /*impossible*/ /* FetchTexel3D */ NULL, /*impossible*/ /* FetchTexel1Df */ - fetch_texel_2d_f_rgba_dxt5, /* FetchTexel2Df */ + fetch_texel_2d_f_srgba_dxt5, /* FetchTexel2Df */ NULL, /*impossible*/ /* FetchTexel3Df */ NULL /* StoreTexel */ }; +#endif |