/*
 * Mesa 3-D graphics library
 * Version:  6.5
 *
 * Copyright (C) 1999-2005  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.
 */

/**
 * quad blending
 */

#include "glheader.h"
#include "imports.h"
#include "sp_context.h"
#include "sp_headers.h"
#include "sp_surface.h"
#include "sp_tile.h"



static void
depth_test_quad(struct quad_stage *qs, struct quad_header *quad)
{
#if 0
   struct softpipe_context *softpipe = qs->softpipe;
   GLfloat dest[4][QUAD_SIZE], result[4][QUAD_SIZE];
   GLuint i;

   /* XXX we're also looping in output_quad() !?! */

   for (i = 0; i < softpipe->framebuffer.num_cbufs; i++) {
      struct softpipe_surface *sps
         = softpipe_surface(softpipe->framebuffer.cbufs[i]);
   
      sps->read_quad_f_swz(sps, quad->x0, quad->y0, dest);

      /* XXX do blend here */

   }
#endif

   qs->next->run(qs->next, quad);
}




struct quad_stage *sp_quad_depth_test_stage( struct softpipe_context *softpipe )
{
   struct quad_stage *stage = CALLOC_STRUCT(quad_stage);

   stage->softpipe = softpipe;
   stage->run = depth_test_quad;

   return stage;
}