stw_pixelformat.c

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/**************************************************************************
 * 
 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
 * 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, sub license, 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 (including the
 * next paragraph) 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 NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
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 **************************************************************************/

#include "pipe/p_debug.h"
#include "stw_pixelformat.h"

#define MAX_PIXELFORMATS   16

static struct pixelformat_info pixelformats[MAX_PIXELFORMATS];
static uint pixelformat_count = 0;
static uint pixelformat_extended_count = 0;

static void
add_standard_pixelformats(
   struct pixelformat_info **ppf,
   uint flags )
{
   struct pixelformat_info *pf = *ppf;
   struct pixelformat_color_info color24 = { 8, 0, 8, 8, 8, 16 };
   struct pixelformat_alpha_info alpha8 = { 8, 24 };
   struct pixelformat_alpha_info noalpha = { 0, 0 };
   struct pixelformat_depth_info depth24s8 = { 24, 8 };
   struct pixelformat_depth_info depth16 = { 16, 0 };

   pf->flags = PF_FLAG_DOUBLEBUFFER | flags;
   pf->color = color24;
   pf->alpha = alpha8;
   pf->depth = depth16;
   pf++;

   pf->flags = PF_FLAG_DOUBLEBUFFER | flags;
   pf->color = color24;
   pf->alpha = alpha8;
   pf->depth = depth24s8;
   pf++;

   pf->flags = PF_FLAG_DOUBLEBUFFER | flags;
   pf->color = color24;
   pf->alpha = noalpha;
   pf->depth = depth16;
   pf++;

   pf->flags = PF_FLAG_DOUBLEBUFFER | flags;
   pf->color = color24;
   pf->alpha = noalpha;
   pf->depth = depth24s8;
   pf++;

   pf->flags = flags;
   pf->color = color24;
   pf->alpha = noalpha;
   pf->depth = depth16;
   pf++;

   pf->flags = flags;
   pf->color = color24;
   pf->alpha = noalpha;
   pf->depth = depth24s8;
   pf++;

   *ppf = pf;
}

void
pixelformat_init( void )
{
   struct pixelformat_info *pf = pixelformats;

   add_standard_pixelformats( &pf, 0 );
   pixelformat_count = pf - pixelformats;

   add_standard_pixelformats( &pf, PF_FLAG_MULTISAMPLED );
   pixelformat_extended_count = pf - pixelformats;

   assert( pixelformat_extended_count <= MAX_PIXELFORMATS );
}

uint
pixelformat_get_count( void )
{
   return pixelformat_count;
}

uint
pixelformat_get_extended_count( void )
{
   return pixelformat_extended_count;
}

const struct pixelformat_info *
pixelformat_get_info( uint index )
{
   assert( index < pixelformat_extended_count );

   return &pixelformats[index];
}

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