reactos/dll/opengl/mesa/main/hint.c

   1
   2 /*
   3  * Mesa 3-D graphics library
   4  * Version:  4.1
   5  *
   6  * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions 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 MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <precomp.h>
  27
  28 void GLAPIENTRY
  29 _mesa_Hint( GLenum target, GLenum mode )
  30 {
  31    GET_CURRENT_CONTEXT(ctx);
  32    ASSERT_OUTSIDE_BEGIN_END(ctx);
  33
  34    if (MESA_VERBOSE & VERBOSE_API)
  35       _mesa_debug(ctx, "glHint %s %s\n",
  36                   _mesa_lookup_enum_by_nr(target),
  37                   _mesa_lookup_enum_by_nr(mode));
  38
  39    if (mode != GL_NICEST && mode != GL_FASTEST && mode != GL_DONT_CARE) {
  40       _mesa_error(ctx, GL_INVALID_ENUM, "glHint(mode)");
  41       return;
  42    }
  43
  44    switch (target) {
  45       case GL_FOG_HINT:
  46          if (ctx->Hint.Fog == mode)
  47             return;
  48          FLUSH_VERTICES(ctx, _NEW_HINT);
  49          ctx->Hint.Fog = mode;
  50          break;
  51       case GL_LINE_SMOOTH_HINT:
  52          if (ctx->Hint.LineSmooth == mode)
  53             return;
  54          FLUSH_VERTICES(ctx, _NEW_HINT);
  55          ctx->Hint.LineSmooth = mode;
  56          break;
  57       case GL_PERSPECTIVE_CORRECTION_HINT:
  58          if (ctx->Hint.PerspectiveCorrection == mode)
  59             return;
  60          FLUSH_VERTICES(ctx, _NEW_HINT);
  61          ctx->Hint.PerspectiveCorrection = mode;
  62          break;
  63       case GL_POINT_SMOOTH_HINT:
  64          if (ctx->Hint.PointSmooth == mode)
  65             return;
  66          FLUSH_VERTICES(ctx, _NEW_HINT);
  67          ctx->Hint.PointSmooth = mode;
  68          break;
  69       case GL_POLYGON_SMOOTH_HINT:
  70          if (ctx->Hint.PolygonSmooth == mode)
  71             return;
  72          FLUSH_VERTICES(ctx, _NEW_HINT);
  73          ctx->Hint.PolygonSmooth = mode;
  74          break;
  75
  76       /* GL_EXT_clip_volume_hint */
  77       case GL_CLIP_VOLUME_CLIPPING_HINT_EXT:
  78          if (ctx->Hint.ClipVolumeClipping == mode)
  79             return;
  80          FLUSH_VERTICES(ctx, _NEW_HINT);
  81          ctx->Hint.ClipVolumeClipping = mode;
  82          break;
  83
  84       default:
  85          _mesa_error(ctx, GL_INVALID_ENUM, "glHint(target)");
  86          return;
  87    }
  88
  89    if (ctx->Driver.Hint) {
  90       (*ctx->Driver.Hint)( ctx, target, mode );
  91    }
  92 }
  93
  94
  95 /**********************************************************************/
  96 /*****                      Initialization                        *****/
  97 /**********************************************************************/
  98
  99 void _mesa_init_hint( struct gl_context * ctx )
 100 {
 101    /* Hint group */
 102    ctx->Hint.PerspectiveCorrection = GL_DONT_CARE;
 103    ctx->Hint.PointSmooth = GL_DONT_CARE;
 104    ctx->Hint.LineSmooth = GL_DONT_CARE;
 105    ctx->Hint.PolygonSmooth = GL_DONT_CARE;
 106    ctx->Hint.Fog = GL_DONT_CARE;
 107    ctx->Hint.ClipVolumeClipping = GL_DONT_CARE;
 108 }