1 // 2 // Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved. 3 // Use of this source code is governed by a BSD-style license that can be 4 // found in the LICENSE file. 5 // 6 7 #ifndef _BASICTYPES_INCLUDED_ 8 #define _BASICTYPES_INCLUDED_ 9 10 // 11 // Precision qualifiers 12 // 13 enum TPrecision 14 { 15 // These need to be kept sorted 16 EbpUndefined, 17 EbpLow, 18 EbpMedium, 19 EbpHigh 20 }; 21 22 inline const char* getPrecisionString(TPrecision p) 23 { 24 switch(p) 25 { 26 case EbpHigh: return "highp"; break; 27 case EbpMedium: return "mediump"; break; 28 case EbpLow: return "lowp"; break; 29 default: return "mediump"; break; // Safest fallback 30 } 31 } 32 33 // 34 // Basic type. Arrays, vectors, etc., are orthogonal to this. 35 // 36 enum TBasicType 37 { 38 EbtVoid, 39 EbtFloat, 40 EbtInt, 41 EbtBool, 42 EbtGuardSamplerBegin, // non type: see implementation of IsSampler() 43 EbtSampler2D, 44 EbtSamplerCube, 45 EbtSamplerExternalOES, // Only valid if OES_EGL_image_external exists. 46 EbtSampler2DRect, // Only valid if GL_ARB_texture_rectangle exists. 47 EbtGuardSamplerEnd, // non type: see implementation of IsSampler() 48 EbtStruct, 49 EbtAddress, // should be deprecated?? 50 EbtInvariant // used as a type when qualifying a previously declared variable as being invariant 51 }; 52 53 inline const char* getBasicString(TBasicType t) 54 { 55 switch (t) 56 { 57 case EbtVoid: return "void"; break; 58 case EbtFloat: return "float"; break; 59 case EbtInt: return "int"; break; 60 case EbtBool: return "bool"; break; 61 case EbtSampler2D: return "sampler2D"; break; 62 case EbtSamplerCube: return "samplerCube"; break; 63 case EbtSamplerExternalOES: return "samplerExternalOES"; break; 64 case EbtSampler2DRect: return "sampler2DRect"; break; 65 case EbtStruct: return "structure"; break; 66 default: return "unknown type"; 67 } 68 } 69 70 inline bool IsSampler(TBasicType type) 71 { 72 return type > EbtGuardSamplerBegin && type < EbtGuardSamplerEnd; 73 } 74 75 // 76 // Qualifiers and built-ins. These are mainly used to see what can be read 77 // or written, and by the machine dependent translator to know which registers 78 // to allocate variables in. Since built-ins tend to go to different registers 79 // than varying or uniform, it makes sense they are peers, not sub-classes. 80 // 81 enum TQualifier 82 { 83 EvqTemporary, // For temporaries (within a function), read/write 84 EvqGlobal, // For globals read/write 85 EvqConst, // User defined constants and non-output parameters in functions 86 EvqAttribute, // Readonly 87 EvqVaryingIn, // readonly, fragment shaders only 88 EvqVaryingOut, // vertex shaders only read/write 89 EvqInvariantVaryingIn, // readonly, fragment shaders only 90 EvqInvariantVaryingOut, // vertex shaders only read/write 91 EvqUniform, // Readonly, vertex and fragment 92 93 // parameters 94 EvqIn, 95 EvqOut, 96 EvqInOut, 97 EvqConstReadOnly, 98 99 // built-ins written by vertex shader 100 EvqPosition, 101 EvqPointSize, 102 103 // built-ins read by fragment shader 104 EvqFragCoord, 105 EvqFrontFacing, 106 EvqPointCoord, 107 108 // built-ins written by fragment shader 109 EvqFragColor, 110 EvqFragData, 111 EvqFragDepth, 112 113 // end of list 114 EvqLast 115 }; 116 117 // 118 // This is just for debug print out, carried along with the definitions above. 119 // 120 inline const char* getQualifierString(TQualifier q) 121 { 122 switch(q) 123 { 124 case EvqTemporary: return "Temporary"; break; 125 case EvqGlobal: return "Global"; break; 126 case EvqConst: return "const"; break; 127 case EvqConstReadOnly: return "const"; break; 128 case EvqAttribute: return "attribute"; break; 129 case EvqVaryingIn: return "varying"; break; 130 case EvqVaryingOut: return "varying"; break; 131 case EvqInvariantVaryingIn: return "invariant varying"; break; 132 case EvqInvariantVaryingOut:return "invariant varying"; break; 133 case EvqUniform: return "uniform"; break; 134 case EvqIn: return "in"; break; 135 case EvqOut: return "out"; break; 136 case EvqInOut: return "inout"; break; 137 case EvqPosition: return "Position"; break; 138 case EvqPointSize: return "PointSize"; break; 139 case EvqFragCoord: return "FragCoord"; break; 140 case EvqFrontFacing: return "FrontFacing"; break; 141 case EvqFragColor: return "FragColor"; break; 142 case EvqFragData: return "FragData"; break; 143 case EvqFragDepth: return "FragDepth"; break; 144 default: return "unknown qualifier"; 145 } 146 } 147 148 #endif // _BASICTYPES_INCLUDED_ 149
