src/mesa/state_tracker/st_atom_cbuf.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   */
  32
  33 #include "st_context.h"
  34 #include "pipe/p_context.h"
  35 #include "st_atom.h"
  36
  37 extern GLboolean xmesa_get_cbuf_details( GLcontext *ctx,
  38                                          void **ptr,
  39                                          GLuint *cpp,
  40                                          GLint *stride,
  41                                          GLuint *format );
  42
  43
  44 /* This is a hack to work with the X11 driver as a test harness
  45  */
  46 static void update_cbuf_state( struct st_context *st )
  47 {
  48    struct pipe_surface cbuf;
  49    GLboolean ok;
  50
  51    ok = xmesa_get_cbuf_details( st->ctx,
  52                                 (void **)&cbuf.ptr,
  53                                 &cbuf.cpp,
  54                                 &cbuf.stride,
  55                                 &cbuf.format );
  56
  57    assert(ok);
  58
  59    if (memcmp(&cbuf, &st->state.cbuf, sizeof(cbuf)) != 0) {
  60       st->state.cbuf = cbuf;
  61       st->pipe->set_cbuf_state( st->pipe, &cbuf );
  62    }
  63 }
  64
  65 const struct st_tracked_state st_update_cbuf = {
  66    .dirty = {
  67       .mesa = _NEW_BUFFERS,
  68       .st  = 0,
  69    },
  70    .update = update_cbuf_state
  71 };
  72