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 27 #include "glheader.h" 28 #include "enums.h" 29 #include "context.h" 30 #include "hint.h" 31 #include "imports.h" 32 #include "mtypes.h" 33 34 35 36 void GLAPIENTRY 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 %s\n", 44 _mesa_lookup_enum_by_nr(target), 45 _mesa_lookup_enum_by_nr(mode)); 46 47 if (mode != GL_NICEST && mode != GL_FASTEST && mode != GL_DONT_CARE) { 48 _mesa_error(ctx, GL_INVALID_ENUM, "glHint(mode)"); 49 return; 50 } 51 52 switch (target) { 53 case GL_FOG_HINT: 54 if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES) 55 goto invalid_target; 56 if (ctx->Hint.Fog == mode) 57 return; 58 FLUSH_VERTICES(ctx, _NEW_HINT); 59 ctx->Hint.Fog = mode; 60 break; 61 case GL_LINE_SMOOTH_HINT: 62 if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES) 63 goto invalid_target; 64 if (ctx->Hint.LineSmooth == mode) 65 return; 66 FLUSH_VERTICES(ctx, _NEW_HINT); 67 ctx->Hint.LineSmooth = mode; 68 break; 69 case GL_PERSPECTIVE_CORRECTION_HINT: 70 if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES) 71 goto invalid_target; 72 if (ctx->Hint.PerspectiveCorrection == mode) 73 return; 74 FLUSH_VERTICES(ctx, _NEW_HINT); 75 ctx->Hint.PerspectiveCorrection = mode; 76 break; 77 case GL_POINT_SMOOTH_HINT: 78 if (ctx->API != API_OPENGL && ctx->API != API_OPENGLES) 79 goto invalid_target; 80 if (ctx->Hint.PointSmooth == mode) 81 return; 82 FLUSH_VERTICES(ctx, _NEW_HINT); 83 ctx->Hint.PointSmooth = mode; 84 break; 85 case GL_POLYGON_SMOOTH_HINT: 86 if (!_mesa_is_desktop_gl(ctx)) 87 goto invalid_target; 88 if (ctx->Hint.PolygonSmooth == mode) 89 return; 90 FLUSH_VERTICES(ctx, _NEW_HINT); 91 ctx->Hint.PolygonSmooth = mode; 92 break; 93 94 /* GL_EXT_clip_volume_hint */ 95 case GL_CLIP_VOLUME_CLIPPING_HINT_EXT: 96 if (ctx->API != API_OPENGL) 97 goto invalid_target; 98 if (ctx->Hint.ClipVolumeClipping == mode) 99 return; 100 FLUSH_VERTICES(ctx, _NEW_HINT); 101 ctx->Hint.ClipVolumeClipping = mode; 102 break; 103 104 /* GL_ARB_texture_compression */ 105 case GL_TEXTURE_COMPRESSION_HINT_ARB: 106 if (!_mesa_is_desktop_gl(ctx)) 107 goto invalid_target; 108 if (ctx->Hint.TextureCompression == mode) 109 return; 110 FLUSH_VERTICES(ctx, _NEW_HINT); 111 ctx->Hint.TextureCompression = mode; 112 break; 113 114 /* GL_SGIS_generate_mipmap */ 115 case GL_GENERATE_MIPMAP_HINT_SGIS: 116 if (ctx->API == API_OPENGL_CORE) 117 goto invalid_target; 118 if (ctx->Hint.GenerateMipmap == mode) 119 return; 120 FLUSH_VERTICES(ctx, _NEW_HINT); 121 ctx->Hint.GenerateMipmap = mode; 122 break; 123 124 /* GL_ARB_fragment_shader */ 125 case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_ARB: 126 if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_fragment_shader) 127 goto invalid_target; 128 if (ctx->Hint.FragmentShaderDerivative == mode) 129 return; 130 FLUSH_VERTICES(ctx, _NEW_HINT); 131 ctx->Hint.FragmentShaderDerivative = mode; 132 break; 133 134 default: 135 goto invalid_target; 136 } 137 138 if (ctx->Driver.Hint) { 139 (*ctx->Driver.Hint)( ctx, target, mode ); 140 } 141 142 return; 143 144 invalid_target: 145 _mesa_error(ctx, GL_INVALID_ENUM, "glHint(target)"); 146 return; 147 } 148 149 150 /**********************************************************************/ 151 /***** Initialization *****/ 152 /**********************************************************************/ 153 154 void _mesa_init_hint( struct gl_context * ctx ) 155 { 156 /* Hint group */ 157 ctx->Hint.PerspectiveCorrection = GL_DONT_CARE; 158 ctx->Hint.PointSmooth = GL_DONT_CARE; 159 ctx->Hint.LineSmooth = GL_DONT_CARE; 160 ctx->Hint.PolygonSmooth = GL_DONT_CARE; 161 ctx->Hint.Fog = GL_DONT_CARE; 162 ctx->Hint.ClipVolumeClipping = GL_DONT_CARE; 163 ctx->Hint.TextureCompression = GL_DONT_CARE; 164 ctx->Hint.GenerateMipmap = GL_DONT_CARE; 165 ctx->Hint.FragmentShaderDerivative = GL_DONT_CARE; 166 } 167
