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Initial work for GL_EXT_texture_sRGB.

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This commit is contained in:
Brian Paul 2006-08-03 03:20:52 +00:00
parent 35fe7cfae4
commit 8d214bc804
9 changed files with 359 additions and 4 deletions
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3
src/mesa/main/config.h
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@ -5,7 +5,7 @@
/*
* Mesa 3-D graphics library
* Version: 6.5
* Version: 6.5.1
*
* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
*
@ -308,6 +308,7 @@
#define FEATURE_ATI_fragment_shader _HAVE_FULL_GL
#define FEATURE_EXT_framebuffer_object _HAVE_FULL_GL
#define FEATURE_EXT_framebuffer_blit _HAVE_FULL_GL
#define FEATURE_EXT_texture_sRGB _HAVE_FULL_GL
/*@}*/

23
src/mesa/main/extensions.c
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@ -1,6 +1,6 @@
/*
* Mesa 3-D graphics library
* Version: 6.5
* Version: 6.5.1
*
* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
*
@ -122,6 +122,7 @@ static const struct {
{ OFF, "GL_EXT_texture_mirror_clamp", F(EXT_texture_mirror_clamp) },
{ ON, "GL_EXT_texture_object", F(EXT_texture_object) },
{ OFF, "GL_EXT_texture_rectangle", F(NV_texture_rectangle) },
{ OFF, "GL_EXT_texture_sRGB", F(EXT_texture_sRGB) },
{ OFF, "GL_EXT_timer_query", F(EXT_timer_query) },
{ ON, "GL_EXT_vertex_array", F(EXT_vertex_array) },
{ OFF, "GL_EXT_vertex_array_set", F(EXT_vertex_array_set) },
@ -253,6 +254,9 @@ _mesa_enable_sw_extensions(GLcontext *ctx)
ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
ctx->Extensions.EXT_texture_mirror_clamp = GL_TRUE;
ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
#if FEATURE_EXT_texture_sRGB
ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
#endif
ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;
ctx->Extensions.MESA_pack_invert = GL_TRUE;
#if FEATURE_MESA_program_debug
@ -387,6 +391,23 @@ _mesa_enable_2_0_extensions(GLcontext *ctx)
}
/**
* Enable all OpenGL 2.1 features and extensions.
* A convenience function to be called by drivers.
*/
void
_mesa_enable_2_1_extensions(GLcontext *ctx)
{
#if FEATURE_EXT_pixel_buffer_object
ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
#endif
#if FEATURE_EXT_texture_sRGB
ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
#endif
/* plus: shading language extensions, non-square uniform matrices */
}
/**
* Either enable or disable the named extension.

6
src/mesa/main/extensions.h
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@ -10,9 +10,9 @@
/*
* Mesa 3-D graphics library
* Version: 6.3
* Version: 6.5.1
*
* Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
* Copyright (C) 1999-2006 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"),
@ -52,6 +52,8 @@ extern void _mesa_enable_1_5_extensions(GLcontext *ctx);
extern void _mesa_enable_2_0_extensions(GLcontext *ctx);
extern void _mesa_enable_2_1_extensions(GLcontext *ctx);
extern void _mesa_enable_extension(GLcontext *ctx, const char *name);
extern void _mesa_disable_extension(GLcontext *ctx, const char *name);

3
src/mesa/main/mtypes.h
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@ -2112,7 +2112,9 @@ struct gl_shared_state
struct _mesa_HashTable *BufferObjects;
#endif
#if FEATURE_ARB_shader_objects
struct _mesa_HashTable *GL2Objects;
#endif
#if FEATURE_EXT_framebuffer_object
struct _mesa_HashTable *RenderBuffers;
@ -2473,6 +2475,7 @@ struct gl_extensions
GLboolean EXT_texture_filter_anisotropic;
GLboolean EXT_texture_lod_bias;
GLboolean EXT_texture_mirror_clamp;
GLboolean EXT_texture_sRGB;
GLboolean EXT_timer_query;
GLboolean EXT_vertex_array;
GLboolean EXT_vertex_array_set;

168
src/mesa/main/texformat.c
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@ -37,6 +37,38 @@
#include "texstore.h"
#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 / 12.92;
}
else {
table[i] = _mesa_pow((cs + 0.055) / 1.055, 2.4);
}
}
tableReady = GL_TRUE;
}
return table[cs8];
}
#endif /* FEATURE_EXT_texture_sRGB */
/* Texel fetch routines for all supported formats
*/
@ -251,6 +283,106 @@ const struct gl_texture_format _mesa_texformat_intensity = {
};
#if FEATURE_EXT_texture_sRGB
const struct gl_texture_format _mesa_texformat_srgb8 = {
MESA_FORMAT_SRGB8, /* MesaFormat */
GL_RGB, /* BaseFormat */
GL_UNSIGNED_NORMALIZED_ARB, /* DataType */
8, /* RedBits */
8, /* GreenBits */
8, /* BlueBits */
0, /* AlphaBits */
0, /* LuminanceBits */
0, /* IntensityBits */
0, /* IndexBits */
0, /* DepthBits */
0, /* StencilBits */
3, /* TexelBytes */
_mesa_texstore_srgb8, /* StoreTexImageFunc */
NULL, /* FetchTexel1D */
NULL, /* FetchTexel2D */
NULL, /* FetchTexel3D */
fetch_texel_1d_srgb8, /* FetchTexel1Df */
fetch_texel_2d_srgb8, /* FetchTexel2Df */
fetch_texel_3d_srgb8, /* FetchTexel3Df */
store_texel_srgb8 /* StoreTexel */
};
const struct gl_texture_format _mesa_texformat_srgba8 = {
MESA_FORMAT_SRGBA8, /* MesaFormat */
GL_RGBA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED_ARB, /* DataType */
8, /* RedBits */
8, /* GreenBits */
8, /* BlueBits */
8, /* AlphaBits */
0, /* LuminanceBits */
0, /* IntensityBits */
0, /* IndexBits */
0, /* DepthBits */
0, /* StencilBits */
4, /* TexelBytes */
_mesa_texstore_srgba8, /* StoreTexImageFunc */
NULL, /* FetchTexel1D */
NULL, /* FetchTexel2D */
NULL, /* FetchTexel3D */
fetch_texel_1d_srgba8, /* FetchTexel1Df */
fetch_texel_2d_srgba8, /* FetchTexel2Df */
fetch_texel_3d_srgba8, /* FetchTexel3Df */
store_texel_srgba8 /* StoreTexel */
};
const struct gl_texture_format _mesa_texformat_sl8 = {
MESA_FORMAT_SL8, /* MesaFormat */
GL_LUMINANCE, /* BaseFormat */
GL_UNSIGNED_NORMALIZED_ARB, /* DataType */
0, /* RedBits */
0, /* GreenBits */
0, /* BlueBits */
0, /* AlphaBits */
8, /* LuminanceBits */
0, /* IntensityBits */
0, /* IndexBits */
0, /* DepthBits */
0, /* StencilBits */
1, /* TexelBytes */
_mesa_texstore_sl8, /* StoreTexImageFunc */
NULL, /* FetchTexel1D */
NULL, /* FetchTexel2D */
NULL, /* FetchTexel3D */
fetch_texel_1d_sl8, /* FetchTexel1Df */
fetch_texel_2d_sl8, /* FetchTexel2Df */
fetch_texel_3d_sl8, /* FetchTexel3Df */
store_texel_sl8 /* StoreTexel */
};
const struct gl_texture_format _mesa_texformat_sla8 = {
MESA_FORMAT_SLA8, /* MesaFormat */
GL_LUMINANCE_ALPHA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED_ARB, /* DataType */
0, /* RedBits */
0, /* GreenBits */
0, /* BlueBits */
8, /* AlphaBits */
8, /* LuminanceBits */
0, /* IntensityBits */
0, /* IndexBits */
0, /* DepthBits */
0, /* StencilBits */
2, /* TexelBytes */
_mesa_texstore_sla8, /* StoreTexImageFunc */
NULL, /* FetchTexel1D */
NULL, /* FetchTexel2D */
NULL, /* FetchTexel3D */
fetch_texel_1d_sla8, /* FetchTexel1Df */
fetch_texel_2d_sla8, /* FetchTexel2Df */
fetch_texel_3d_sla8, /* FetchTexel3Df */
store_texel_sla8 /* StoreTexel */
};
#endif /* FEATURE_EXT_texture_sRGB */
const struct gl_texture_format _mesa_texformat_rgba_float32 = {
MESA_FORMAT_RGBA_FLOAT32, /* MesaFormat */
GL_RGBA, /* BaseFormat */
@ -1398,6 +1530,42 @@ _mesa_choose_tex_format( GLcontext *ctx, GLint internalFormat,
}
}
#if FEATURE_EXT_texture_sRGB
if (ctx->Extensions.EXT_texture_sRGB) {
switch (internalFormat) {
case GL_SRGB_EXT:
case GL_SRGB8_EXT:
return &_mesa_texformat_srgb8;
case GL_SRGB_ALPHA_EXT:
case GL_SRGB8_ALPHA8_EXT:
return &_mesa_texformat_srgba8;
case GL_SLUMINANCE_EXT:
case GL_SLUMINANCE8_EXT:
return &_mesa_texformat_sl8;
case GL_SLUMINANCE_ALPHA_EXT:
case GL_SLUMINANCE8_ALPHA8_EXT:
return &_mesa_texformat_sla8;
/* NOTE: not supporting any compression of sRGB at this time */
case GL_COMPRESSED_SRGB_EXT:
return &_mesa_texformat_srgb8;
case GL_COMPRESSED_SRGB_ALPHA_EXT:
return &_mesa_texformat_srgba8;
case GL_COMPRESSED_SLUMINANCE_EXT:
return &_mesa_texformat_sl8;
case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
return &_mesa_texformat_sla8;
case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
return &_mesa_texformat_srgb8;
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
return &_mesa_texformat_srgba8;
default:
; /* fallthrough */
}
}
#endif /* FEATURE_EXT_texture_sRGB */
_mesa_problem(ctx, "unexpected format in _mesa_choose_tex_format()");
return NULL;
}

22
src/mesa/main/texformat.h
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@ -88,6 +88,18 @@ enum _format {
MESA_FORMAT_Z32, /*ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ */
/*@}*/
#if FEATURE_EXT_texture_sRGB
/**
* \name 8-bit/channel sRGB formats
*/
/*@{*/
MESA_FORMAT_SRGB8,
MESA_FORMAT_SRGBA8,
MESA_FORMAT_SL8,
MESA_FORMAT_SLA8,
/*@}*/
#endif
/**
* \name Compressed texture formats.
*/
@ -149,6 +161,16 @@ extern const struct gl_texture_format _mesa_texformat_luminance_alpha;
extern const struct gl_texture_format _mesa_texformat_intensity;
/*@}*/
#if FEATURE_EXT_texture_sRGB
/** sRGB (nonlinear) formats */
/*@{*/
extern const struct gl_texture_format _mesa_texformat_srgb8;
extern const struct gl_texture_format _mesa_texformat_srgba8;
extern const struct gl_texture_format _mesa_texformat_s8;
extern const struct gl_texture_format _mesa_texformat_sla8;
/*@}*/
#endif
/** Floating point texture formats */
/*@{*/
extern const struct gl_texture_format _mesa_texformat_rgba_float32;

97
src/mesa/main/texformat_tmp.h
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@ -1174,6 +1174,103 @@ static void store_texel_ci8(struct gl_texture_image *texImage,
#endif
#if FEATURE_EXT_texture_sRGB
/* Fetch texel from 1D, 2D or 3D srgb8 texture, return 4 GLfloats */
static void FETCH(srgb8)(const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 3);
texel[RCOMP] = nonlinear_to_linear(src[0]);
texel[GCOMP] = nonlinear_to_linear(src[1]);
texel[BCOMP] = nonlinear_to_linear(src[2]);
texel[ACOMP] = CHAN_MAX;
}
#if DIM == 3
static void store_texel_srgb8(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLubyte *dst = TEXEL_ADDR(GLubyte, texImage, i, j, k, 3);
dst[0] = rgba[RCOMP]; /* no conversion */
dst[1] = rgba[GCOMP];
dst[2] = rgba[BCOMP];
}
#endif
/* Fetch texel from 1D, 2D or 3D srgba8 texture, return 4 GLfloats */
static void FETCH(srgba8)(const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 4);
texel[RCOMP] = nonlinear_to_linear(src[0]);
texel[GCOMP] = nonlinear_to_linear(src[1]);
texel[BCOMP] = nonlinear_to_linear(src[2]);
texel[ACOMP] = UBYTE_TO_FLOAT(src[3]); /* linear! */
}
#if DIM == 3
static void store_texel_srgba8(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLubyte *dst = TEXEL_ADDR(GLubyte, texImage, i, j, k, 4);
dst[0] = rgba[RCOMP];
dst[1] = rgba[GCOMP];
dst[2] = rgba[BCOMP];
}
#endif
/* Fetch texel from 1D, 2D or 3D sl8 texture, return 4 GLfloats */
static void FETCH(sl8)(const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = nonlinear_to_linear(src[0]);
texel[ACOMP] = CHAN_MAX;
}
#if DIM == 3
static void store_texel_sl8(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLubyte *dst = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
dst[0] = rgba[RCOMP];
}
#endif
/* Fetch texel from 1D, 2D or 3D sla8 texture, return 4 GLfloats */
static void FETCH(sla8)(const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel )
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 2);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = nonlinear_to_linear(src[0]);
texel[ACOMP] = UBYTE_TO_FLOAT(src[1]); /* linear */
}
#if DIM == 3
static void store_texel_sla8(struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, const void *texel)
{
const GLubyte *rgba = (const GLubyte *) texel;
GLubyte *dst = TEXEL_ADDR(GLubyte, texImage, i, j, k, 2);
dst[0] = rgba[RCOMP];
dst[1] = rgba[ACOMP];
}
#endif
#endif /* FEATURE_EXT_texture_sRGB */
/* MESA_FORMAT_YCBCR *********************************************************/
/* Fetch texel from 1D, 2D or 3D ycbcr texture, return 4 GLchans */

35
src/mesa/main/texstore.c
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@ -2164,6 +2164,41 @@ _mesa_texstore_rgba_float16(TEXSTORE_PARAMS)
}
#if FEATURE_EXT_texture_sRGB
GLboolean
_mesa_texstore_srgb8(TEXSTORE_PARAMS)
{
/* XXX to do */
_mesa_problem(ctx, "_mesa_texstore_srgb8 not finished");
return GL_FALSE;
}
GLboolean
_mesa_texstore_srgba8(TEXSTORE_PARAMS)
{
/* XXX to do */
_mesa_problem(ctx, "_mesa_texstore_srgb8 not finished");
return GL_FALSE;
}
GLboolean
_mesa_texstore_sl8(TEXSTORE_PARAMS)
{
/* XXX to do */
_mesa_problem(ctx, "_mesa_texstore_srgb8 not finished");
return GL_FALSE;
}
GLboolean
_mesa_texstore_sla8(TEXSTORE_PARAMS)
{
/* XXX to do */
_mesa_problem(ctx, "_mesa_texstore_srgb8 not finished");
return GL_FALSE;
}
#endif /* FEATURE_EXT_texture_sRGB */
/**
* Check if an unpack PBO is active prior to fetching a texture image.

6
src/mesa/main/texstore.h
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@ -67,6 +67,12 @@ extern GLboolean _mesa_texstore_rgb_dxt1(TEXSTORE_PARAMS);
extern GLboolean _mesa_texstore_rgba_dxt1(TEXSTORE_PARAMS);
extern GLboolean _mesa_texstore_rgba_dxt3(TEXSTORE_PARAMS);
extern GLboolean _mesa_texstore_rgba_dxt5(TEXSTORE_PARAMS);
#if FEATURE_EXT_texture_sRGB
extern GLboolean _mesa_texstore_srgb8(TEXSTORE_PARAMS);
extern GLboolean _mesa_texstore_srgba8(TEXSTORE_PARAMS);
extern GLboolean _mesa_texstore_sl8(TEXSTORE_PARAMS);
extern GLboolean _mesa_texstore_sla8(TEXSTORE_PARAMS);
#endif
extern GLchan *