/*
 * 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_fxt1.c
 * GL_EXT_texture_compression_fxt1 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_fxt1( GLcontext *ctx )
{
   /* called during context initialization */
}


static GLboolean
texstore_rgb_fxt1(STORE_PARAMS)
{
   /* XXX to do */
   return GL_FALSE;
}


static GLboolean
texstore_rgba_fxt1(STORE_PARAMS)
{
   /* XXX to do */
   return GL_FALSE;
}



static void
fetch_texel_2d_rgba_fxt1( const struct gl_texture_image *texImage,
                          GLint i, GLint j, GLint k, GLchan *texel )
{
   /* XXX to do */
}


static void
fetch_texel_2d_f_rgba_fxt1( 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_fxt1(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_rgb_fxt1( const struct gl_texture_image *texImage,
                         GLint i, GLint j, GLint k, GLchan *texel )
{
   /* XXX to do */
}


static void
fetch_texel_2d_f_rgb_fxt1( 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_fxt1(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_fxt1 = {
   MESA_FORMAT_RGB_FXT1,		/* 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_fxt1,			/* StoreTexImageFunc */
   NULL, /*impossible*/ 		/* FetchTexel1D */
   fetch_texel_2d_rgb_fxt1, 		/* FetchTexel2D */
   NULL, /*impossible*/ 		/* FetchTexel3D */
   NULL, /*impossible*/ 		/* FetchTexel1Df */
   fetch_texel_2d_f_rgb_fxt1, 		/* FetchTexel2Df */
   NULL, /*impossible*/ 		/* FetchTexel3Df */
};

const struct gl_texture_format _mesa_texformat_rgba_fxt1 = {
   MESA_FORMAT_RGBA_FXT1,		/* 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_fxt1,			/* StoreTexImageFunc */
   NULL, /*impossible*/ 		/* FetchTexel1D */
   fetch_texel_2d_rgba_fxt1, 		/* FetchTexel2D */
   NULL, /*impossible*/ 		/* FetchTexel3D */
   NULL, /*impossible*/ 		/* FetchTexel1Df */
   fetch_texel_2d_f_rgba_fxt1, 		/* FetchTexel2Df */
   NULL, /*impossible*/ 		/* FetchTexel3Df */
};