src/gallium/drivers/softpipe/sp_clear.c

/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * Copyright 2009 VMware, Inc.  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.
 * 
 **************************************************************************/

/* Author:
 *    Brian Paul
 *    Michel Dänzer
 */


#include "pipe/p_defines.h"
#include "util/u_pack_color.h"
#include "sp_clear.h"
#include "sp_context.h"
#include "sp_tile_cache.h"


/**
 * Clear the given buffers to the specified values.
 * No masking, no scissor (clear entire buffer).
 */
void
softpipe_clear(struct pipe_context *pipe, unsigned buffers, const float *rgba,
               double depth, unsigned stencil)
{
   struct softpipe_context *softpipe = softpipe_context(pipe);
   unsigned cv;
   uint i;

   if (softpipe->no_rast)
      return;

#if 0
   softpipe_update_derived(softpipe); /* not needed?? */
#endif

   if (buffers & PIPE_CLEAR_COLOR) {
      for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++) {
         struct pipe_surface *ps = softpipe->framebuffer.cbufs[i];

         util_pack_color(rgba, ps->format, &cv);
         sp_tile_cache_clear(softpipe->cbuf_cache[i], rgba, cv);

#if !TILE_CLEAR_OPTIMIZATION
         /* non-cached surface */
         pipe->surface_fill(pipe, ps, 0, 0, ps->width, ps->height, cv);
#endif
      }
   }

   if (buffers & PIPE_CLEAR_DEPTHSTENCIL) {
      static const float zero[4] = { 0.0F, 0.0F, 0.0F, 0.0F };
      struct pipe_surface *ps = softpipe->framebuffer.zsbuf;

      cv = util_pack_z_stencil(ps->format, depth, stencil);
      sp_tile_cache_clear(softpipe->zsbuf_cache, zero, cv);

#if !TILE_CLEAR_OPTIMIZATION
      /* non-cached surface */
      pipe->surface_fill(pipe, ps, 0, 0, ps->width, ps->height, cv);
#endif
   }

   softpipe->dirty_render_cache = TRUE;
}