1 2 /* 3 * Mesa 3-D graphics library 4 * 5 * Copyright (C) 1999-2002 Brian Paul All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included 15 * in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 * 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 41 if (MESA_VERBOSE & VERBOSE_API) 42 _mesa_debug(ctx, "glHint %s %s\n", 43 _mesa_enum_to_string(target), 44 _mesa_enum_to_string(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->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES) 54 goto invalid_target; 55 if (ctx->Hint.Fog == mode) 56 return; 57 FLUSH_VERTICES(ctx, _NEW_HINT); 58 ctx->Hint.Fog = mode; 59 break; 60 case GL_LINE_SMOOTH_HINT: 61 if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES) 62 goto invalid_target; 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->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES) 70 goto invalid_target; 71 if (ctx->Hint.PerspectiveCorrection == mode) 72 return; 73 FLUSH_VERTICES(ctx, _NEW_HINT); 74 ctx->Hint.PerspectiveCorrection = mode; 75 break; 76 case GL_POINT_SMOOTH_HINT: 77 if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES) 78 goto invalid_target; 79 if (ctx->Hint.PointSmooth == mode) 80 return; 81 FLUSH_VERTICES(ctx, _NEW_HINT); 82 ctx->Hint.PointSmooth = mode; 83 break; 84 case GL_POLYGON_SMOOTH_HINT: 85 if (!_mesa_is_desktop_gl(ctx)) 86 goto invalid_target; 87 if (ctx->Hint.PolygonSmooth == mode) 88 return; 89 FLUSH_VERTICES(ctx, _NEW_HINT); 90 ctx->Hint.PolygonSmooth = mode; 91 break; 92 93 /* GL_ARB_texture_compression */ 94 case GL_TEXTURE_COMPRESSION_HINT_ARB: 95 if (!_mesa_is_desktop_gl(ctx)) 96 goto invalid_target; 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->API == API_OPENGL_CORE) 106 goto invalid_target; 107 if (ctx->Hint.GenerateMipmap == mode) 108 return; 109 FLUSH_VERTICES(ctx, _NEW_HINT); 110 ctx->Hint.GenerateMipmap = mode; 111 break; 112 113 /* GL_ARB_fragment_shader */ 114 case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_ARB: 115 if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_fragment_shader) 116 goto invalid_target; 117 if (ctx->Hint.FragmentShaderDerivative == mode) 118 return; 119 FLUSH_VERTICES(ctx, _NEW_HINT); 120 ctx->Hint.FragmentShaderDerivative = mode; 121 break; 122 123 default: 124 goto invalid_target; 125 } 126 return; 127 128 invalid_target: 129 _mesa_error(ctx, GL_INVALID_ENUM, "glHint(target)"); 130 return; 131 } 132 133 134 /**********************************************************************/ 135 /***** Initialization *****/ 136 /**********************************************************************/ 137 138 void _mesa_init_hint( struct gl_context * ctx ) 139 { 140 /* Hint group */ 141 ctx->Hint.PerspectiveCorrection = GL_DONT_CARE; 142 ctx->Hint.PointSmooth = GL_DONT_CARE; 143 ctx->Hint.LineSmooth = GL_DONT_CARE; 144 ctx->Hint.PolygonSmooth = GL_DONT_CARE; 145 ctx->Hint.Fog = GL_DONT_CARE; 146 ctx->Hint.TextureCompression = GL_DONT_CARE; 147 ctx->Hint.GenerateMipmap = GL_DONT_CARE; 148 ctx->Hint.FragmentShaderDerivative = GL_DONT_CARE; 149 } 150