* 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"),
*/
#ifndef USE_EXTERNAL_DXTN_LIB
-#define USE_EXTERNAL_DXTN_LIB 0
+#define USE_EXTERNAL_DXTN_LIB 1
#endif
#include "glheader.h"
#include "colormac.h"
#include "context.h"
#include "convolve.h"
+#include "dlopen.h"
#include "image.h"
#include "texcompress.h"
#include "texformat.h"
#include "texstore.h"
-#if USE_EXTERNAL_DXTN_LIB && !defined(__MINGW32__)
-#include <dlfcn.h>
-#endif
-
#ifdef __MINGW32__
#define DXTN_LIBNAME "dxtn.dll"
#define RTLD_LAZY 0
#define DXTN_LIBNAME "libtxc_dxtn.so"
#endif
+#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 );
static void *dxtlibhandle = NULL;
-typedef void (*GenericFunc)(void);
-
-
-/**
- * Wrapper for dlopen().
- * XXX Probably move this and the following wrappers into imports.h someday.
- */
-static void *
-_mesa_dlopen(const char *libname, int flags)
-{
-#if USE_EXTERNAL_DXTN_LIB
-#ifdef __MINGW32__
- return LoadLibrary(libname);
-#else
- return dlopen(libname, flags);
-#endif
-#else
- return NULL;
-#endif /* USE_EXTERNAL_DXTN_LIB */
-}
-
-
-/**
- * Wrapper for dlsym() that does a cast to a generic function type,
- * rather than a void *. This reduces the number of warnings that are
- * generated.
- */
-static GenericFunc
-_mesa_dlsym(void *handle, const char *fname)
-{
-#if USE_EXTERNAL_DXTN_LIB
-#ifdef __MINGW32__
- return (GenericFunc) GetProcAddress(handle, fname);
-#elif defined(__DJGPP__)
- /* need '_' prefix on symbol names */
- char fname2[1000];
- fname2[0] = '_';
- _mesa_strncpy(fname2 + 1, fname, 998);
- fname2[999] = 0;
- return (GenericFunc) dlsym(handle, fname2);
-#else
- return (GenericFunc) dlsym(handle, fname);
-#endif
-#else
- return (GenericFunc) NULL;
-#endif /* USE_EXTERNAL_DXTN_LIB */
-}
-
-
-/**
- * Wrapper for dlclose().
- */
-static void
-_mesa_dlclose(void *handle)
-{
-#if USE_EXTERNAL_DXTN_LIB
-#ifdef __MINGW32__
- FreeLibrary(handle);
-#else
- dlclose(handle);
-#endif
-#endif
-}
-
-
-
void
_mesa_init_texture_s3tc( GLcontext *ctx )
{
ctx->Mesa_DXTn = GL_FALSE;
#if USE_EXTERNAL_DXTN_LIB
if (!dxtlibhandle) {
- dxtlibhandle = _mesa_dlopen(DXTN_LIBNAME, RTLD_LAZY | RTLD_GLOBAL);
+ dxtlibhandle = _mesa_dlopen(DXTN_LIBNAME, 0);
if (!dxtlibhandle) {
_mesa_warning(ctx, "couldn't open " DXTN_LIBNAME ", software DXTn "
"compression/decompression unavailable");
dst, dstRowStride);
}
else {
- _mesa_warning(ctx, "external dxt library not available");
+ _mesa_warning(ctx, "external dxt library not available: texstore_rgb_dxt1");
}
if (tempImage)
dst, dstRowStride);
}
else {
- _mesa_warning(ctx, "external dxt library not available");
+ _mesa_warning(ctx, "external dxt library not available: texstore_rgba_dxt1");
}
if (tempImage)
dst, dstRowStride);
}
else {
- _mesa_warning(ctx, "external dxt library not available");
+ _mesa_warning(ctx, "external dxt library not available: texstore_rgba_dxt3");
}
if (tempImage)
dst, dstRowStride);
}
else {
- _mesa_warning(ctx, "external dxt library not available");
+ _mesa_warning(ctx, "external dxt library not available: texstore_rgba_dxt5");
}
if (tempImage)
(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");
}
(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");
}
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");
}
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");
}
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
const struct gl_texture_format _mesa_texformat_rgb_dxt1 = {
MESA_FORMAT_RGB_DXT1, /* MesaFormat */
NULL /* StoreTexel */
};
+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 */
+ 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 */
+};
+
+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 */
+ 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 */
+};
+
+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 */
+ 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 */
+};
+
#if FEATURE_EXT_texture_sRGB
const struct gl_texture_format _mesa_texformat_srgb_dxt1 = {
MESA_FORMAT_SRGB_DXT1, /* MesaFormat */
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 */
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 */
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 */
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
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