src/mesa/main/hint.c

   1 /* $Id: hint.c,v 1.14 2002/10/24 23:57:21 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  4.1
   6  *
   7  * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 #include "glheader.h"
  29 #include "enums.h"
  30 #include "context.h"
  31 #include "hint.h"
  32 #include "imports.h"
  33
  34
  35
  36 void
  37 _mesa_Hint( GLenum target, GLenum mode )
  38 {
  39    GET_CURRENT_CONTEXT(ctx);
  40    ASSERT_OUTSIDE_BEGIN_END(ctx);
  41
  42    if (MESA_VERBOSE & VERBOSE_API)
  43       _mesa_debug(ctx, "glHint %s %d\n",
  44                   _mesa_lookup_enum_by_nr(target), mode);
  45
  46    if (mode != GL_NICEST && mode != GL_FASTEST && mode != GL_DONT_CARE) {
  47       _mesa_error(ctx, GL_INVALID_ENUM, "glHint(mode)");
  48       return;
  49    }
  50
  51    switch (target) {
  52       case GL_FOG_HINT:
  53          if (ctx->Hint.Fog == mode)
  54             return;
  55          FLUSH_VERTICES(ctx, _NEW_HINT);
  56          ctx->Hint.Fog = mode;
  57          break;
  58       case GL_LINE_SMOOTH_HINT:
  59          if (ctx->Hint.LineSmooth == mode)
  60             return;
  61          FLUSH_VERTICES(ctx, _NEW_HINT);
  62          ctx->Hint.LineSmooth = mode;
  63          break;
  64       case GL_PERSPECTIVE_CORRECTION_HINT:
  65          if (ctx->Hint.PerspectiveCorrection == mode)
  66             return;
  67          FLUSH_VERTICES(ctx, _NEW_HINT);
  68          ctx->Hint.PerspectiveCorrection = mode;
  69          break;
  70       case GL_POINT_SMOOTH_HINT:
  71          if (ctx->Hint.PointSmooth == mode)
  72             return;
  73          FLUSH_VERTICES(ctx, _NEW_HINT);
  74          ctx->Hint.PointSmooth = mode;
  75          break;
  76       case GL_POLYGON_SMOOTH_HINT:
  77          if (ctx->Hint.PolygonSmooth == mode)
  78             return;
  79          FLUSH_VERTICES(ctx, _NEW_HINT);
  80          ctx->Hint.PolygonSmooth = mode;
  81          break;
  82
  83       /* GL_EXT_clip_volume_hint */
  84       case GL_CLIP_VOLUME_CLIPPING_HINT_EXT:
  85          if (ctx->Hint.ClipVolumeClipping == mode)
  86             return;
  87          FLUSH_VERTICES(ctx, _NEW_HINT);
  88          ctx->Hint.ClipVolumeClipping = mode;
  89          break;
  90
  91       /* GL_ARB_texture_compression */
  92       case GL_TEXTURE_COMPRESSION_HINT_ARB:
  93          if (!ctx->Extensions.ARB_texture_compression) {
  94             _mesa_error(ctx, GL_INVALID_ENUM, "glHint(target)");
  95             return;
  96          }
  97          if (ctx->Hint.TextureCompression == mode)
  98             return;
  99          FLUSH_VERTICES(ctx, _NEW_HINT);
 100          ctx->Hint.TextureCompression = mode;
 101          break;
 102
 103       /* GL_SGIS_generate_mipmap */
 104       case GL_GENERATE_MIPMAP_HINT_SGIS:
 105          if (!ctx->Extensions.SGIS_generate_mipmap) {
 106             _mesa_error(ctx, GL_INVALID_ENUM, "glHint(target)");
 107             return;
 108          }
 109          if (ctx->Hint.GenerateMipmap == mode)
 110             return;
 111          FLUSH_VERTICES(ctx, _NEW_HINT);
 112          ctx->Hint.GenerateMipmap = mode;
 113          break;
 114
 115       default:
 116          _mesa_error(ctx, GL_INVALID_ENUM, "glHint(target)");
 117          return;
 118    }
 119
 120    if (ctx->Driver.Hint) {
 121       (*ctx->Driver.Hint)( ctx, target, mode );
 122    }
 123 }