workbench/libs/mesa/src/gallium/drivers/softpipe/sp_clear.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  * Copyright 2009 VMware, Inc.  All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 /* Author:
  30  *    Brian Paul
  31  *    Michel Dänzer
  32  */
  33
  34
  35 #include "pipe/p_defines.h"
  36 #include "util/u_pack_color.h"
  37 #include "sp_clear.h"
  38 #include "sp_context.h"
  39 #include "sp_query.h"
  40 #include "sp_tile_cache.h"
  41
  42
  43 /**
  44  * Clear the given buffers to the specified values.
  45  * No masking, no scissor (clear entire buffer).
  46  */
  47 void
  48 softpipe_clear(struct pipe_context *pipe, unsigned buffers, const float *rgba,
  49                double depth, unsigned stencil)
  50 {
  51    struct softpipe_context *softpipe = softpipe_context(pipe);
  52    union util_color uc;
  53    unsigned cv;
  54    uint i;
  55
  56    if (softpipe->no_rast)
  57       return;
  58
  59    if (!softpipe_check_render_cond(softpipe))
  60       return;
  61
  62 #if 0
  63    softpipe_update_derived(softpipe); /* not needed?? */
  64 #endif
  65
  66    if (buffers & PIPE_CLEAR_COLOR) {
  67       for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++) {
  68          struct pipe_surface *ps = softpipe->framebuffer.cbufs[i];
  69
  70          util_pack_color(rgba, ps->format, &uc);
  71          sp_tile_cache_clear(softpipe->cbuf_cache[i], rgba, uc.ui);
  72       }
  73    }
  74
  75    if (buffers & PIPE_CLEAR_DEPTHSTENCIL) {
  76       static const float zero[4] = { 0.0F, 0.0F, 0.0F, 0.0F };
  77       struct pipe_surface *ps = softpipe->framebuffer.zsbuf;
  78
  79       cv = util_pack_z_stencil(ps->format, depth, stencil);
  80       sp_tile_cache_clear(softpipe->zsbuf_cache, zero, cv);
  81    }
  82
  83    softpipe->dirty_render_cache = TRUE;
  84 }