src/mesa/pipe/softpipe/sp_clear.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /* Author:
  29  *    Brian Paul
  30  */
  31
  32
  33 #include "pipe/p_defines.h"
  34 #include "sp_clear.h"
  35 #include "sp_context.h"
  36 #include "sp_surface.h"
  37 #include "sp_state.h"
  38
  39
  40 /**
  41  * Clear the given surface to the specified value.
  42  * No masking, no scissor (clear entire buffer).
  43  */
  44 void
  45 softpipe_clear(struct pipe_context *pipe, struct pipe_surface *ps,
  46                unsigned clearValue)
  47 {
  48    struct softpipe_context *softpipe = softpipe_context(pipe);
  49    unsigned x, y, w, h;
  50
  51    softpipe_update_derived(softpipe); /* not needed?? */
  52
  53    w = softpipe->framebuffer.cbufs[0]->width;
  54    h = softpipe->framebuffer.cbufs[0]->height;
  55
  56    /* Use the X coord to trick region_fill() into filling at an offset
  57     * from the start of the region.  Perhaps pipe_region should have the
  58     * 'offset' field, not pipe_surface???
  59     */
  60    assert(ps->offset % ps->region->cpp == 0);
  61    x = ps->offset / ps->region->cpp;
  62    y = 0;
  63
  64    assert(w <= ps->region->pitch);
  65    assert(h <= ps->region->height);
  66
  67    pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearValue);
  68 }