src/mesa/state_tracker/st_atom_stipple.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
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
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  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.
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  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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  26  **************************************************************************/
  27
  28  /*
  29   * \brief polygon stipple state
  30   *
  31   * Authors:
  32   *   Brian Paul
  33   */
  34
  35
  36 #include "st_context.h"
  37 #include "st_atom.h"
  38 #include "pipe/p_context.h"
  39 #include "pipe/p_defines.h"
  40
  41
  42 static void
  43 update_stipple( struct st_context *st )
  44 {
  45    const GLuint sz = sizeof(st->state.poly_stipple.stipple);
  46    assert(sz == sizeof(st->ctx->PolygonStipple));
  47
  48    if (memcmp(&st->state.poly_stipple.stipple, st->ctx->PolygonStipple, sz)) {
  49       /* state has changed */
  50       memcpy(st->state.poly_stipple.stipple, st->ctx->PolygonStipple, sz);
  51       st->pipe->set_polygon_stipple(st->pipe, &st->state.poly_stipple);
  52    }
  53 }
  54
  55
  56 const struct st_tracked_state st_update_polygon_stipple = {
  57    "st_update_polygon_stipple",                         /* name */
  58    {                                                    /* dirty */
  59       (_NEW_POLYGONSTIPPLE),                            /* mesa */
  60       0,                                                /* st */
  61    },
  62    update_stipple                                       /* update */
  63 };