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      1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
      2 //
      3 // Licensed under the Apache License, Version 2.0 (the "License");
      4 // you may not use this file except in compliance with the License.
      5 // You may obtain a copy of the License at
      6 //
      7 //    http://www.apache.org/licenses/LICENSE-2.0
      8 //
      9 // Unless required by applicable law or agreed to in writing, software
     10 // distributed under the License is distributed on an "AS IS" BASIS,
     11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 // See the License for the specific language governing permissions and
     13 // limitations under the License.
     14 
     15 //
     16 // Create strings that declare built-in definitions, add built-ins that
     17 // cannot be expressed in the files, and establish mappings between
     18 // built-in functions and operators.
     19 //
     20 
     21 #include "Initialize.h"
     22 
     23 #include "intermediate.h"
     24 
     25 void InsertBuiltInFunctions(GLenum type, const ShBuiltInResources &resources, TSymbolTable &symbolTable)
     26 {
     27 	TType *float1 = new TType(EbtFloat);
     28 	TType *float2 = new TType(EbtFloat, 2);
     29 	TType *float3 = new TType(EbtFloat, 3);
     30 	TType *float4 = new TType(EbtFloat, 4);
     31 	TType *genType = new TType(EbtGenType);
     32 
     33 	TType *int1 = new TType(EbtInt);
     34 	TType *int2 = new TType(EbtInt, 2);
     35 	TType *int3 = new TType(EbtInt, 3);
     36 	TType *uint1 = new TType(EbtUInt);
     37 	TType *genIType = new TType(EbtGenIType);
     38 	TType *genUType = new TType(EbtGenUType);
     39 	TType *genBType = new TType(EbtGenBType);
     40 
     41 	//
     42 	// Angle and Trigonometric Functions.
     43 	//
     44 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpRadians, genType, "radians", genType);
     45 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpDegrees, genType, "degrees", genType);
     46 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpSin, genType, "sin", genType);
     47 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpCos, genType, "cos", genType);
     48 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpTan, genType, "tan", genType);
     49 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpAsin, genType, "asin", genType);
     50 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpAcos, genType, "acos", genType);
     51 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpAtan, genType, "atan", genType, genType);
     52 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpAtan, genType, "atan", genType);
     53 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpSinh, genType, "sinh", genType);
     54 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpCosh, genType, "cosh", genType);
     55 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpTanh, genType, "tanh", genType);
     56 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpAsinh, genType, "asinh", genType);
     57 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpAcosh, genType, "acosh", genType);
     58 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpAtanh, genType, "atanh", genType);
     59 
     60 	//
     61 	// Exponential Functions.
     62 	//
     63 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpPow, genType, "pow", genType, genType);
     64 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpExp, genType, "exp", genType);
     65 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpLog, genType, "log", genType);
     66 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpExp2, genType, "exp2", genType);
     67 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpLog2, genType, "log2", genType);
     68 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpSqrt, genType, "sqrt", genType);
     69 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpInverseSqrt, genType, "inversesqrt", genType);
     70 
     71 	//
     72 	// Common Functions.
     73 	//
     74 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpAbs, genType, "abs", genType);
     75 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpAbs, genIType, "abs", genIType);
     76 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpSign, genType, "sign", genType);
     77 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpSign, genIType, "sign", genIType);
     78 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpFloor, genType, "floor", genType);
     79 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpTrunc, genType, "trunc", genType);
     80 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpRound, genType, "round", genType);
     81 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpRoundEven, genType, "roundEven", genType);
     82 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpCeil, genType, "ceil", genType);
     83 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpFract, genType, "fract", genType);
     84 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpMod, genType, "mod", genType, float1);
     85 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpMod, genType, "mod", genType, genType);
     86 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpMin, genType, "min", genType, float1);
     87 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpMin, genType, "min", genType, genType);
     88 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMin, genIType, "min", genIType, genIType);
     89 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMin, genIType, "min", genIType, int1);
     90 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMin, genUType, "min", genUType, genUType);
     91 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMin, genUType, "min", genUType, uint1);
     92 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpMax, genType, "max", genType, float1);
     93 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpMax, genType, "max", genType, genType);
     94 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMax, genIType, "max", genIType, genIType);
     95 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMax, genIType, "max", genIType, int1);
     96 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMax, genUType, "max", genUType, genUType);
     97 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMax, genUType, "max", genUType, uint1);
     98 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpClamp, genType, "clamp", genType, float1, float1);
     99 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpClamp, genType, "clamp", genType, genType, genType);
    100 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpClamp, genIType, "clamp", genIType, int1, int1);
    101 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpClamp, genIType, "clamp", genIType, genIType, genIType);
    102 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpClamp, genUType, "clamp", genUType, uint1, uint1);
    103 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpClamp, genUType, "clamp", genUType, genUType, genUType);
    104 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpMix, genType, "mix", genType, genType, float1);
    105 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpMix, genType, "mix", genType, genType, genType);
    106 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpMix, genType, "mix", genType, genType, genBType);
    107 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpStep, genType, "step", genType, genType);
    108 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpStep, genType, "step", float1, genType);
    109 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpSmoothStep, genType, "smoothstep", genType, genType, genType);
    110 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpSmoothStep, genType, "smoothstep", float1, float1, genType);
    111 
    112 	TType *outFloat1 = new TType(EbtFloat, EbpUndefined, EvqOut);
    113 	TType *outFloat2 = new TType(EbtFloat, EbpUndefined, EvqOut, 2);
    114 	TType *outFloat3 = new TType(EbtFloat, EbpUndefined, EvqOut, 3);
    115 	TType *outFloat4 = new TType(EbtFloat, EbpUndefined, EvqOut, 4);
    116 
    117 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpModf, float1, "modf", float1, outFloat1);
    118 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpModf, float2, "modf", float2, outFloat2);
    119 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpModf, float3, "modf", float3, outFloat3);
    120 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpModf, float4, "modf", float4, outFloat4);
    121 
    122 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpIsNan, genBType, "isnan", genType);
    123 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpIsInf, genBType, "isinf", genType);
    124 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpFloatBitsToInt, genIType, "floatBitsToInt", genType);
    125 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpFloatBitsToUint, genUType, "floatBitsToUint", genType);
    126 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpIntBitsToFloat, genType, "intBitsToFloat", genIType);
    127 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpUintBitsToFloat, genType, "uintBitsToFloat", genUType);
    128 
    129 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpPackSnorm2x16, uint1, "packSnorm2x16", float2);
    130 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpPackUnorm2x16, uint1, "packUnorm2x16", float2);
    131 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpPackHalf2x16, uint1, "packHalf2x16", float2);
    132 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpUnpackSnorm2x16, float2, "unpackSnorm2x16", uint1);
    133 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpUnpackUnorm2x16, float2, "unpackUnorm2x16", uint1);
    134 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpUnpackHalf2x16, float2, "unpackHalf2x16", uint1);
    135 
    136 	//
    137 	// Geometric Functions.
    138 	//
    139 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpLength, float1, "length", genType);
    140 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpDistance, float1, "distance", genType, genType);
    141 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpDot, float1, "dot", genType, genType);
    142 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpCross, float3, "cross", float3, float3);
    143 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpNormalize, genType, "normalize", genType);
    144 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpFaceForward, genType, "faceforward", genType, genType, genType);
    145 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpReflect, genType, "reflect", genType, genType);
    146 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpRefract, genType, "refract", genType, genType, float1);
    147 
    148 	TType *mat2 = new TType(EbtFloat, 2, 2);
    149 	TType *mat2x3 = new TType(EbtFloat, 2, 3);
    150 	TType *mat2x4 = new TType(EbtFloat, 2, 4);
    151 	TType *mat3x2 = new TType(EbtFloat, 3, 2);
    152 	TType *mat3 = new TType(EbtFloat, 3, 3);
    153 	TType *mat3x4 = new TType(EbtFloat, 3, 4);
    154 	TType *mat4x2 = new TType(EbtFloat, 4, 2);
    155 	TType *mat4x3 = new TType(EbtFloat, 4, 3);
    156 	TType *mat4 = new TType(EbtFloat, 4, 4);
    157 
    158 	//
    159 	// Matrix Functions.
    160 	//
    161 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpMul, mat2, "matrixCompMult", mat2, mat2);
    162 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpMul, mat3, "matrixCompMult", mat3, mat3);
    163 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpMul, mat4, "matrixCompMult", mat4, mat4);
    164 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMul, mat2x3, "matrixCompMult", mat2x3, mat2x3);
    165 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMul, mat3x2, "matrixCompMult", mat3x2, mat3x2);
    166 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMul, mat2x4, "matrixCompMult", mat2x4, mat2x4);
    167 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMul, mat4x2, "matrixCompMult", mat4x2, mat4x2);
    168 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMul, mat3x4, "matrixCompMult", mat3x4, mat3x4);
    169 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpMul, mat4x3, "matrixCompMult", mat4x3, mat4x3);
    170 
    171 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpOuterProduct, mat2, "outerProduct", float2, float2);
    172 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpOuterProduct, mat3, "outerProduct", float3, float3);
    173 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpOuterProduct, mat4, "outerProduct", float4, float4);
    174 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpOuterProduct, mat2x3, "outerProduct", float3, float2);
    175 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpOuterProduct, mat3x2, "outerProduct", float2, float3);
    176 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpOuterProduct, mat2x4, "outerProduct", float4, float2);
    177 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpOuterProduct, mat4x2, "outerProduct", float2, float4);
    178 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpOuterProduct, mat3x4, "outerProduct", float4, float3);
    179 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpOuterProduct, mat4x3, "outerProduct", float3, float4);
    180 
    181 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpTranspose, mat2, "transpose", mat2);
    182 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpTranspose, mat3, "transpose", mat3);
    183 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpTranspose, mat4, "transpose", mat4);
    184 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpTranspose, mat2x3, "transpose", mat3x2);
    185 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpTranspose, mat3x2, "transpose", mat2x3);
    186 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpTranspose, mat2x4, "transpose", mat4x2);
    187 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpTranspose, mat4x2, "transpose", mat2x4);
    188 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpTranspose, mat3x4, "transpose", mat4x3);
    189 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpTranspose, mat4x3, "transpose", mat3x4);
    190 
    191 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpDeterminant, float1, "determinant", mat2);
    192 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpDeterminant, float1, "determinant", mat3);
    193 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpDeterminant, float1, "determinant", mat4);
    194 
    195 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpInverse, mat2, "inverse", mat2);
    196 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpInverse, mat3, "inverse", mat3);
    197 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpInverse, mat4, "inverse", mat4);
    198 
    199 
    200 	TType *bool1 = new TType(EbtBool);
    201 	TType *vec = new TType(EbtVec);
    202 	TType *ivec = new TType(EbtIVec);
    203 	TType *uvec = new TType(EbtUVec);
    204 	TType *bvec = new TType(EbtBVec);
    205 
    206 	//
    207 	// Vector relational functions.
    208 	//
    209 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpLessThan, bvec, "lessThan", vec, vec);
    210 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpLessThan, bvec, "lessThan", ivec, ivec);
    211 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpLessThan, bvec, "lessThan", uvec, uvec);
    212 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpLessThanEqual, bvec, "lessThanEqual", vec, vec);
    213 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpLessThanEqual, bvec, "lessThanEqual", ivec, ivec);
    214 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpLessThanEqual, bvec, "lessThanEqual", uvec, uvec);
    215 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpGreaterThan, bvec, "greaterThan", vec, vec);
    216 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpGreaterThan, bvec, "greaterThan", ivec, ivec);
    217 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpGreaterThan, bvec, "greaterThan", uvec, uvec);
    218 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpGreaterThanEqual, bvec, "greaterThanEqual", vec, vec);
    219 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpGreaterThanEqual, bvec, "greaterThanEqual", ivec, ivec);
    220 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpGreaterThanEqual, bvec, "greaterThanEqual", uvec, uvec);
    221 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpVectorEqual, bvec, "equal", vec, vec);
    222 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpVectorEqual, bvec, "equal", ivec, ivec);
    223 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpVectorEqual, bvec, "equal", uvec, uvec);
    224 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpVectorEqual, bvec, "equal", bvec, bvec);
    225 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpVectorNotEqual, bvec, "notEqual", vec, vec);
    226 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpVectorNotEqual, bvec, "notEqual", ivec, ivec);
    227 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpVectorNotEqual, bvec, "notEqual", uvec, uvec);
    228 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpVectorNotEqual, bvec, "notEqual", bvec, bvec);
    229 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpAny, bool1, "any", bvec);
    230 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpAll, bool1, "all", bvec);
    231 	symbolTable.insertBuiltIn(COMMON_BUILTINS, EOpVectorLogicalNot, bvec, "not", bvec);
    232 
    233 	TType *sampler2D = new TType(EbtSampler2D);
    234 	TType *samplerCube = new TType(EbtSamplerCube);
    235 	TType *sampler3D = new TType(EbtSampler3D);
    236 
    237 	//
    238 	// Texture Functions for GLSL ES 1.0
    239 	//
    240 	symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2D", sampler2D, float2);
    241 	symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2DProj", sampler2D, float3);
    242 	symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2DProj", sampler2D, float4);
    243 	symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "textureCube", samplerCube, float3);
    244 	symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture3D", sampler3D, float3);
    245 
    246 	if(resources.ARB_texture_rectangle)
    247 	{
    248 		TType *sampler2DRect = new TType(EbtSampler2DRect);
    249 
    250 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2DRect", sampler2DRect, float2);
    251 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2DRectProj", sampler2DRect, float3);
    252 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2DRectProj", sampler2DRect, float4);
    253 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, float4, "texture", sampler2DRect, float2);
    254 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, float4, "textureProj", sampler2DRect, float3);
    255 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, float4, "textureProj", sampler2DRect, float4);
    256 	}
    257 
    258 	if(resources.OES_EGL_image_external)
    259 	{
    260 		TType *samplerExternalOES = new TType(EbtSamplerExternalOES);
    261 
    262 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2D", samplerExternalOES, float2);
    263 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2DProj", samplerExternalOES, float3);
    264 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2DProj", samplerExternalOES, float4);
    265 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture3D", samplerExternalOES, float3);
    266 	}
    267 
    268 	if(resources.OES_EGL_image_external_essl3)
    269     {
    270         TType *samplerExternalOES = new TType(EbtSamplerExternalOES);
    271 
    272         symbolTable.insertBuiltIn(ESSL3_BUILTINS, float4, "texture", samplerExternalOES, float2);
    273         symbolTable.insertBuiltIn(ESSL3_BUILTINS, float4, "textureProj", samplerExternalOES, float3);
    274         symbolTable.insertBuiltIn(ESSL3_BUILTINS, float4, "textureProj", samplerExternalOES, float4);
    275 
    276         symbolTable.insertBuiltIn(ESSL3_BUILTINS, int2, "textureSize", samplerExternalOES, int1);
    277         symbolTable.insertBuiltIn(ESSL3_BUILTINS, float4, "texelFetch", samplerExternalOES, int2, int1);
    278     }
    279 
    280 	if(type == GL_FRAGMENT_SHADER)
    281 	{
    282 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2D", sampler2D, float2, float1);
    283 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2DProj", sampler2D, float3, float1);
    284 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2DProj", sampler2D, float4, float1);
    285 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "textureCube", samplerCube, float3, float1);
    286 
    287 		if(resources.OES_standard_derivatives)
    288 		{
    289 			symbolTable.insertBuiltIn(ESSL1_BUILTINS, EOpDFdx, "GL_OES_standard_derivatives", genType, "dFdx", genType);
    290 			symbolTable.insertBuiltIn(ESSL1_BUILTINS, EOpDFdy, "GL_OES_standard_derivatives", genType, "dFdy", genType);
    291 			symbolTable.insertBuiltIn(ESSL1_BUILTINS, EOpFwidth,"GL_OES_standard_derivatives", genType, "fwidth", genType);
    292 		}
    293 	}
    294 
    295 	if(type == GL_VERTEX_SHADER)
    296 	{
    297 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2DLod", sampler2D, float2, float1);
    298 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2DProjLod", sampler2D, float3, float1);
    299 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture2DProjLod", sampler2D, float4, float1);
    300 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "textureCubeLod", samplerCube, float3, float1);
    301 		symbolTable.insertBuiltIn(ESSL1_BUILTINS, float4, "texture3DLod", sampler3D, float3, float1);
    302 	}
    303 
    304 	TType *gvec4 = new TType(EbtGVec4);
    305 
    306 	TType *gsampler2D = new TType(EbtGSampler2D);
    307 	TType *gsamplerCube = new TType(EbtGSamplerCube);
    308 	TType *gsampler3D = new TType(EbtGSampler3D);
    309 	TType *gsampler2DArray = new TType(EbtGSampler2DArray);
    310 
    311 	//
    312 	// Texture Functions for GLSL ES 3.0
    313 	//
    314 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texture", gsampler2D, float2);
    315 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texture", gsampler3D, float3);
    316 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texture", gsamplerCube, float3);
    317 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texture", gsampler2DArray, float3);
    318 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProj", gsampler2D, float3);
    319 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProj", gsampler2D, float4);
    320 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProj", gsampler3D, float4);
    321 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureLod", gsampler2D, float2, float1);
    322 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureLod", gsampler3D, float3, float1);
    323 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureLod", gsamplerCube, float3, float1);
    324 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureLod", gsampler2DArray, float3, float1);
    325 
    326 	if(type == GL_FRAGMENT_SHADER)
    327 	{
    328 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texture", gsampler2D, float2, float1);
    329 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texture", gsampler3D, float3, float1);
    330 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texture", gsamplerCube, float3, float1);
    331 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texture", gsampler2DArray, float3, float1);
    332 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProj", gsampler2D, float3, float1);
    333 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProj", gsampler2D, float4, float1);
    334 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProj", gsampler3D, float4, float1);
    335 	}
    336 
    337 	TType *sampler2DShadow = new TType(EbtSampler2DShadow);
    338 	TType *samplerCubeShadow = new TType(EbtSamplerCubeShadow);
    339 	TType *sampler2DArrayShadow = new TType(EbtSampler2DArrayShadow);
    340 
    341 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "texture", sampler2DShadow, float3);
    342 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "texture", samplerCubeShadow, float4);
    343 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "texture", sampler2DArrayShadow, float4);
    344 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureProj", sampler2DShadow, float4);
    345 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureLod", sampler2DShadow, float3, float1);
    346 
    347 	if(type == GL_FRAGMENT_SHADER)
    348 	{
    349 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "texture", sampler2DShadow, float3, float1);
    350 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "texture", samplerCubeShadow, float4, float1);
    351 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureProj", sampler2DShadow, float4, float1);
    352 	}
    353 
    354 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, int2, "textureSize", gsampler2D, int1);
    355 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, int3, "textureSize", gsampler3D, int1);
    356 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, int2, "textureSize", gsamplerCube, int1);
    357 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, int3, "textureSize", gsampler2DArray, int1);
    358 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, int2, "textureSize", sampler2DShadow, int1);
    359 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, int2, "textureSize", samplerCubeShadow, int1);
    360 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, int3, "textureSize", sampler2DArrayShadow, int1);
    361 
    362 	if(type == GL_FRAGMENT_SHADER)
    363 	{
    364 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpDFdx, genType, "dFdx", genType);
    365 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpDFdy, genType, "dFdy", genType);
    366 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, EOpFwidth, genType, "fwidth", genType);
    367 	}
    368 
    369 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureOffset", gsampler2D, float2, int2);
    370 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureOffset", gsampler3D, float3, int3);
    371 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureOffset", sampler2DShadow, float3, int2);
    372 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureOffset", gsampler2DArray, float3, int2);
    373 
    374 	if(type == GL_FRAGMENT_SHADER)
    375 	{
    376 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureOffset", gsampler2D, float2, int2, float1);
    377 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureOffset", gsampler3D, float3, int3, float1);
    378 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureOffset", sampler2DShadow, float3, int2, float1);
    379 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureOffset", gsampler2DArray, float3, int2, float1);
    380 	}
    381 
    382 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjOffset", gsampler2D, float3, int2);
    383 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjOffset", gsampler2D, float4, int2);
    384 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjOffset", gsampler3D, float4, int3);
    385 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureProjOffset", sampler2DShadow, float4, int2);
    386 
    387 	if(type == GL_FRAGMENT_SHADER)
    388 	{
    389 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjOffset", gsampler2D, float3, int2, float1);
    390 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjOffset", gsampler2D, float4, int2, float1);
    391 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjOffset", gsampler3D, float4, int3, float1);
    392 		symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureProjOffset", sampler2DShadow, float4, int2, float1);
    393 	}
    394 
    395 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureLodOffset", gsampler2D, float2, float1, int2);
    396 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureLodOffset", gsampler3D, float3, float1, int3);
    397 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureLodOffset", sampler2DShadow, float3, float1, int2);
    398 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureLodOffset", gsampler2DArray, float3, float1, int2);
    399 
    400 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjLod", gsampler2D, float3, float1);
    401 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjLod", gsampler2D, float4, float1);
    402 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjLod", gsampler3D, float4, float1);
    403 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureProjLod", sampler2DShadow, float4, float1);
    404 
    405 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjLodOffset", gsampler2D, float3, float1, int2);
    406 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjLodOffset", gsampler2D, float4, float1, int2);
    407 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjLodOffset", gsampler3D, float4, float1, int3);
    408 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureProjLodOffset", sampler2DShadow, float4, float1, int2);
    409 
    410 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texelFetch", gsampler2D, int2, int1);
    411 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texelFetch", gsampler3D, int3, int1);
    412 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texelFetch", gsampler2DArray, int3, int1);
    413 
    414 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texelFetchOffset", gsampler2D, int2, int1, int2);
    415 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texelFetchOffset", gsampler3D, int3, int1, int3);
    416 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texelFetchOffset", gsampler2DArray, int3, int1, int2);
    417 
    418 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureGrad", gsampler2D, float2, float2, float2);
    419 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureGrad", gsampler3D, float3, float3, float3);
    420 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureGrad", gsamplerCube, float3, float3, float3);
    421 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureGrad", sampler2DShadow, float3, float2, float2);
    422 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureGrad", samplerCubeShadow, float4, float3, float3);
    423 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureGrad", gsampler2DArray, float3, float2, float2);
    424 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureGrad", sampler2DArrayShadow, float4, float2, float2);
    425 
    426 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureGradOffset", gsampler2D, float2, float2, float2, int2);
    427 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureGradOffset", gsampler3D, float3, float3, float3, int3);
    428 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureGradOffset", sampler2DShadow, float3, float2, float2, int2);
    429 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureGradOffset", gsampler2DArray, float3, float2, float2, int2);
    430 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureGradOffset", sampler2DArrayShadow, float4, float2, float2, int2);
    431 
    432 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjGrad", gsampler2D, float3, float2, float2);
    433 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjGrad", gsampler2D, float4, float2, float2);
    434 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjGrad", gsampler3D, float4, float3, float3);
    435 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureProjGrad", sampler2DShadow, float4, float2, float2);
    436 
    437 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjGradOffset", gsampler2D, float3, float2, float2, int2);
    438 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjGradOffset", gsampler2D, float4, float2, float2, int2);
    439 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "textureProjGradOffset", gsampler3D, float4, float3, float3, int3);
    440 	symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "textureProjGradOffset", sampler2DShadow, float4, float2, float2, int2);
    441 
    442 	//
    443 	// Depth range in window coordinates
    444 	//
    445 	TFieldList *fields = NewPoolTFieldList();
    446 	TSourceLoc zeroSourceLoc = { 0, 0, 0, 0 };
    447 	TField *near = new TField(new TType(EbtFloat, EbpHigh, EvqGlobal, 1), NewPoolTString("near"), zeroSourceLoc);
    448 	TField *far = new TField(new TType(EbtFloat, EbpHigh, EvqGlobal, 1), NewPoolTString("far"), zeroSourceLoc);
    449 	TField *diff = new TField(new TType(EbtFloat, EbpHigh, EvqGlobal, 1), NewPoolTString("diff"), zeroSourceLoc);
    450 	fields->push_back(near);
    451 	fields->push_back(far);
    452 	fields->push_back(diff);
    453 	TStructure *depthRangeStruct = new TStructure(NewPoolTString("gl_DepthRangeParameters"), fields);
    454 	TVariable *depthRangeParameters = new TVariable(&depthRangeStruct->name(), depthRangeStruct, true);
    455 	symbolTable.insert(COMMON_BUILTINS, depthRangeParameters);
    456 	TVariable *depthRange = new TVariable(NewPoolTString("gl_DepthRange"), TType(depthRangeStruct));
    457 	depthRange->setQualifier(EvqUniform);
    458 	symbolTable.insert(COMMON_BUILTINS, depthRange);
    459 
    460 	//
    461 	// Implementation dependent built-in constants.
    462 	//
    463 	symbolTable.insertConstInt(COMMON_BUILTINS, "gl_MaxVertexAttribs", resources.MaxVertexAttribs);
    464 	symbolTable.insertConstInt(COMMON_BUILTINS, "gl_MaxVertexUniformVectors", resources.MaxVertexUniformVectors);
    465 	symbolTable.insertConstInt(COMMON_BUILTINS, "gl_MaxVertexTextureImageUnits", resources.MaxVertexTextureImageUnits);
    466 	symbolTable.insertConstInt(COMMON_BUILTINS, "gl_MaxCombinedTextureImageUnits", resources.MaxCombinedTextureImageUnits);
    467 	symbolTable.insertConstInt(COMMON_BUILTINS, "gl_MaxTextureImageUnits", resources.MaxTextureImageUnits);
    468 	symbolTable.insertConstInt(COMMON_BUILTINS, "gl_MaxFragmentUniformVectors", resources.MaxFragmentUniformVectors);
    469 	symbolTable.insertConstInt(COMMON_BUILTINS, "gl_MaxDrawBuffers", resources.MaxDrawBuffers);
    470 	symbolTable.insertConstInt(ESSL1_BUILTINS, "gl_MaxVaryingVectors", resources.MaxVaryingVectors);
    471 	symbolTable.insertConstInt(ESSL3_BUILTINS, "gl_MaxVertexOutputVectors", resources.MaxVertexOutputVectors);
    472 	symbolTable.insertConstInt(ESSL3_BUILTINS, "gl_MaxFragmentInputVectors", resources.MaxFragmentInputVectors);
    473 	symbolTable.insertConstInt(ESSL3_BUILTINS, "gl_MinProgramTexelOffset", resources.MinProgramTexelOffset);
    474 	symbolTable.insertConstInt(ESSL3_BUILTINS, "gl_MaxProgramTexelOffset", resources.MaxProgramTexelOffset);
    475 }
    476 
    477 void IdentifyBuiltIns(GLenum shaderType,
    478                       const ShBuiltInResources &resources,
    479                       TSymbolTable &symbolTable)
    480 {
    481 	//
    482 	// First, insert some special built-in variables that are not in
    483 	// the built-in header files.
    484 	//
    485 	switch(shaderType)
    486 	{
    487 	case GL_FRAGMENT_SHADER:
    488 		symbolTable.insert(COMMON_BUILTINS, new TVariable(NewPoolTString("gl_FragCoord"), TType(EbtFloat, EbpMedium, EvqFragCoord,   4)));
    489 		symbolTable.insert(COMMON_BUILTINS, new TVariable(NewPoolTString("gl_FrontFacing"), TType(EbtBool,  EbpUndefined, EvqFrontFacing, 1)));
    490 		symbolTable.insert(COMMON_BUILTINS, new TVariable(NewPoolTString("gl_PointCoord"), TType(EbtFloat, EbpMedium, EvqPointCoord,  2)));
    491 		symbolTable.insert(ESSL1_BUILTINS, new TVariable(NewPoolTString("gl_FragColor"), TType(EbtFloat, EbpMedium, EvqFragColor,   4)));
    492 		symbolTable.insert(ESSL1_BUILTINS, new TVariable(NewPoolTString("gl_FragData[gl_MaxDrawBuffers]"), TType(EbtFloat, EbpMedium, EvqFragData,    4)));
    493 		symbolTable.insert(ESSL3_BUILTINS, new TVariable(NewPoolTString("gl_FragDepth"), TType(EbtFloat, EbpHigh, EvqFragDepth, 1)));
    494 		break;
    495 	case GL_VERTEX_SHADER:
    496 		symbolTable.insert(COMMON_BUILTINS, new TVariable(NewPoolTString("gl_Position"), TType(EbtFloat, EbpHigh, EvqPosition,    4)));
    497 		symbolTable.insert(COMMON_BUILTINS, new TVariable(NewPoolTString("gl_PointSize"), TType(EbtFloat, EbpMedium, EvqPointSize,   1)));
    498 		symbolTable.insert(ESSL3_BUILTINS, new TVariable(NewPoolTString("gl_InstanceID"), TType(EbtInt, EbpHigh, EvqInstanceID, 1)));
    499 		symbolTable.insert(ESSL3_BUILTINS, new TVariable(NewPoolTString("gl_VertexID"), TType(EbtInt, EbpHigh, EvqVertexID, 1)));
    500 		break;
    501 	default: assert(false && "Language not supported");
    502 	}
    503 
    504 	// Finally add resource-specific variables.
    505 	switch(shaderType)
    506 	{
    507 	case GL_FRAGMENT_SHADER:
    508 		{
    509 			// Set up gl_FragData.  The array size.
    510 			TType fragData(EbtFloat, EbpMedium, EvqFragData, 4, 1, true);
    511 			fragData.setArraySize(resources.MaxDrawBuffers);
    512 			symbolTable.insert(ESSL1_BUILTINS, new TVariable(NewPoolTString("gl_FragData"), fragData));
    513 		}
    514 		break;
    515 	default: break;
    516 	}
    517 }
    518 
    519 void InitExtensionBehavior(const ShBuiltInResources& resources,
    520                            TExtensionBehavior& extBehavior)
    521 {
    522 	if(resources.OES_standard_derivatives)
    523 		extBehavior["GL_OES_standard_derivatives"] = EBhUndefined;
    524 	if(resources.OES_fragment_precision_high)
    525 		extBehavior["GL_FRAGMENT_PRECISION_HIGH"] = EBhUndefined;
    526 	if(resources.OES_EGL_image_external)
    527 		extBehavior["GL_OES_EGL_image_external"] = EBhUndefined;
    528 	if(resources.OES_EGL_image_external_essl3)
    529 		extBehavior["GL_OES_EGL_image_external_essl3"] = EBhUndefined;
    530 	if(resources.EXT_draw_buffers)
    531 		extBehavior["GL_EXT_draw_buffers"] = EBhUndefined;
    532 	if(resources.ARB_texture_rectangle)
    533 		extBehavior["GL_ARB_texture_rectangle"] = EBhUndefined;
    534 }
    535