src/mesa/main/hint.c

   1 /* $Id: hint.c,v 1.13 2002/06/15 02:54:02 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 #ifdef PC_HEADER
  29 #include "all.h"
  30 #else
  31 #include "glheader.h"
  32 #include "enums.h"
  33 #include "context.h"
  34 #include "hint.h"
  35 #include "state.h"
  36 #endif
  37
  38
  39
  40 void
  41 _mesa_Hint( GLenum target, GLenum mode )
  42 {
  43    GET_CURRENT_CONTEXT(ctx);
  44    ASSERT_OUTSIDE_BEGIN_END(ctx);
  45
  46    if (MESA_VERBOSE & VERBOSE_API)
  47       _mesa_debug(ctx, "glHint %s %d\n",
  48                   _mesa_lookup_enum_by_nr(target), mode);
  49
  50    if (mode != GL_NICEST && mode != GL_FASTEST && mode != GL_DONT_CARE) {
  51       _mesa_error(ctx, GL_INVALID_ENUM, "glHint(mode)");
  52       return;
  53    }
  54
  55    switch (target) {
  56       case GL_FOG_HINT:
  57          if (ctx->Hint.Fog == mode)
  58             return;
  59          FLUSH_VERTICES(ctx, _NEW_HINT);
  60          ctx->Hint.Fog = mode;
  61          break;
  62       case GL_LINE_SMOOTH_HINT:
  63          if (ctx->Hint.LineSmooth == mode)
  64             return;
  65          FLUSH_VERTICES(ctx, _NEW_HINT);
  66          ctx->Hint.LineSmooth = mode;
  67          break;
  68       case GL_PERSPECTIVE_CORRECTION_HINT:
  69          if (ctx->Hint.PerspectiveCorrection == mode)
  70             return;
  71          FLUSH_VERTICES(ctx, _NEW_HINT);
  72          ctx->Hint.PerspectiveCorrection = mode;
  73          break;
  74       case GL_POINT_SMOOTH_HINT:
  75          if (ctx->Hint.PointSmooth == mode)
  76             return;
  77          FLUSH_VERTICES(ctx, _NEW_HINT);
  78          ctx->Hint.PointSmooth = mode;
  79          break;
  80       case GL_POLYGON_SMOOTH_HINT:
  81          if (ctx->Hint.PolygonSmooth == mode)
  82             return;
  83          FLUSH_VERTICES(ctx, _NEW_HINT);
  84          ctx->Hint.PolygonSmooth = mode;
  85          break;
  86
  87       /* GL_EXT_clip_volume_hint */
  88       case GL_CLIP_VOLUME_CLIPPING_HINT_EXT:
  89          if (ctx->Hint.ClipVolumeClipping == mode)
  90             return;
  91          FLUSH_VERTICES(ctx, _NEW_HINT);
  92          ctx->Hint.ClipVolumeClipping = mode;
  93          break;
  94
  95       /* GL_ARB_texture_compression */
  96       case GL_TEXTURE_COMPRESSION_HINT_ARB:
  97          if (!ctx->Extensions.ARB_texture_compression) {
  98             _mesa_error(ctx, GL_INVALID_ENUM, "glHint(target)");
  99             return;
 100          }
 101          if (ctx->Hint.TextureCompression == mode)
 102             return;
 103          FLUSH_VERTICES(ctx, _NEW_HINT);
 104          ctx->Hint.TextureCompression = mode;
 105          break;
 106
 107       /* GL_SGIS_generate_mipmap */
 108       case GL_GENERATE_MIPMAP_HINT_SGIS:
 109          if (!ctx->Extensions.SGIS_generate_mipmap) {
 110             _mesa_error(ctx, GL_INVALID_ENUM, "glHint(target)");
 111             return;
 112          }
 113          if (ctx->Hint.GenerateMipmap == mode)
 114             return;
 115          FLUSH_VERTICES(ctx, _NEW_HINT);
 116          ctx->Hint.GenerateMipmap = mode;
 117          break;
 118
 119       default:
 120          _mesa_error(ctx, GL_INVALID_ENUM, "glHint(target)");
 121          return;
 122    }
 123
 124    if (ctx->Driver.Hint) {
 125       (*ctx->Driver.Hint)( ctx, target, mode );
 126    }
 127 }