/**************************************************************************
 * 
 * Copyright 2007 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.
 * 
 **************************************************************************/

/**
 * \brief  quad colormask stage
 * \author Brian Paul
 */

#include "main/glheader.h"
#include "main/imports.h"
#include "main/macros.h"
#include "pipe/p_defines.h"
#include "sp_context.h"
#include "sp_headers.h"
#include "sp_surface.h"
#include "sp_quad.h"



static void
colormask_quad(struct quad_stage *qs, struct quad_header *quad)
{
   struct softpipe_context *softpipe = qs->softpipe;
   struct softpipe_surface *sps = softpipe_surface(softpipe->cbuf);
   GLfloat dest[4][QUAD_SIZE];
   
   sps->read_quad_f_swz(sps, quad->x0, quad->y0, dest);

   /* R */
   if (!(softpipe->blend.colormask & PIPE_MASK_R))
       COPY_4FV(quad->outputs.color[0], dest[0]);

   /* G */
   if (!(softpipe->blend.colormask & PIPE_MASK_G))
       COPY_4FV(quad->outputs.color[1], dest[1]);

   /* B */
   if (!(softpipe->blend.colormask & PIPE_MASK_B))
       COPY_4FV(quad->outputs.color[2], dest[2]);

   /* A */
   if (!(softpipe->blend.colormask & PIPE_MASK_A))
       COPY_4FV(quad->outputs.color[3], dest[3]);

   /* pass quad to next stage */
   qs->next->run(qs->next, quad);
}




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

   stage->softpipe = softpipe;
   stage->run = colormask_quad;

   return stage;
}