src/mesa/state_tracker/st_atom_clear_color.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  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   *   Brian Paul
  32   */
  33
  34 #include "st_context.h"
  35 #include "st_atom.h"
  36 #include "pipe/p_context.h"
  37
  38
  39 static void
  40 update_clear_color_state( struct st_context *st )
  41 {
  42    struct pipe_clear_color_state clear;
  43
  44    clear.color[0] = st->ctx->Color.ClearColor[0];
  45    clear.color[1] = st->ctx->Color.ClearColor[1];
  46    clear.color[2] = st->ctx->Color.ClearColor[2];
  47    clear.color[3] = st->ctx->Color.ClearColor[3];
  48
  49    if (memcmp(&clear, &st->state.clear_color, sizeof(clear)) != 0) {
  50       st->state.clear_color = clear;
  51       st->pipe->set_clear_color_state( st->pipe, &clear );
  52    }
  53 }
  54
  55
  56 const struct st_tracked_state st_update_clear_color = {
  57    .name = "st_update_clear_color",
  58    .dirty = {
  59       .mesa = _NEW_COLOR,
  60       .st  = 0,
  61    },
  62    .update = update_clear_color_state
  63 };