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kc3-lang/angle/src/compiler/Initialize.cpp
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Author :
daniel@transgaming.com
Date : 2010-09-22 17:13:50
Hash : ecd7cf35
Message : Define vertex texture sampling intrinsics only when supported TRAC #12245 This ensures that the shader will fail to compile when using VTF when it's not supported. Previously an error was generated only at link time and it was not very descriptive. Signed-off-by: Daniel Koch Author: Nicolas Capens git-svn-id: https://angleproject.googlecode.com/svn/trunk@433 736b8ea6-26fd-11df-bfd4-992fa37f6226
- src/compiler/Initialize.cpp
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// // Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // // // Create strings that declare built-in definitions, add built-ins that // cannot be expressed in the files, and establish mappings between // built-in functions and operators. // #include "compiler/Initialize.h" #include "compiler/intermediate.h" //============================================================================ // // Prototypes for built-in functions seen by both vertex and fragment shaders. // //============================================================================ static TString BuiltInFunctionsCommon() { TString s; // // Angle and Trigonometric Functions. // s.append(TString("float radians(float degrees);")); s.append(TString("vec2 radians(vec2 degrees);")); s.append(TString("vec3 radians(vec3 degrees);")); s.append(TString("vec4 radians(vec4 degrees);")); s.append(TString("float degrees(float radians);")); s.append(TString("vec2 degrees(vec2 radians);")); s.append(TString("vec3 degrees(vec3 radians);")); s.append(TString("vec4 degrees(vec4 radians);")); s.append(TString("float sin(float angle);")); s.append(TString("vec2 sin(vec2 angle);")); s.append(TString("vec3 sin(vec3 angle);")); s.append(TString("vec4 sin(vec4 angle);")); s.append(TString("float cos(float angle);")); s.append(TString("vec2 cos(vec2 angle);")); s.append(TString("vec3 cos(vec3 angle);")); s.append(TString("vec4 cos(vec4 angle);")); s.append(TString("float tan(float angle);")); s.append(TString("vec2 tan(vec2 angle);")); s.append(TString("vec3 tan(vec3 angle);")); s.append(TString("vec4 tan(vec4 angle);")); s.append(TString("float asin(float x);")); s.append(TString("vec2 asin(vec2 x);")); s.append(TString("vec3 asin(vec3 x);")); s.append(TString("vec4 asin(vec4 x);")); s.append(TString("float acos(float x);")); s.append(TString("vec2 acos(vec2 x);")); s.append(TString("vec3 acos(vec3 x);")); s.append(TString("vec4 acos(vec4 x);")); s.append(TString("float atan(float y, float x);")); s.append(TString("vec2 atan(vec2 y, vec2 x);")); s.append(TString("vec3 atan(vec3 y, vec3 x);")); s.append(TString("vec4 atan(vec4 y, vec4 x);")); s.append(TString("float atan(float y_over_x);")); s.append(TString("vec2 atan(vec2 y_over_x);")); s.append(TString("vec3 atan(vec3 y_over_x);")); s.append(TString("vec4 atan(vec4 y_over_x);")); // // Exponential Functions. // s.append(TString("float pow(float x, float y);")); s.append(TString("vec2 pow(vec2 x, vec2 y);")); s.append(TString("vec3 pow(vec3 x, vec3 y);")); s.append(TString("vec4 pow(vec4 x, vec4 y);")); s.append(TString("float exp(float x);")); s.append(TString("vec2 exp(vec2 x);")); s.append(TString("vec3 exp(vec3 x);")); s.append(TString("vec4 exp(vec4 x);")); s.append(TString("float log(float x);")); s.append(TString("vec2 log(vec2 x);")); s.append(TString("vec3 log(vec3 x);")); s.append(TString("vec4 log(vec4 x);")); s.append(TString("float exp2(float x);")); s.append(TString("vec2 exp2(vec2 x);")); s.append(TString("vec3 exp2(vec3 x);")); s.append(TString("vec4 exp2(vec4 x);")); s.append(TString("float log2(float x);")); s.append(TString("vec2 log2(vec2 x);")); s.append(TString("vec3 log2(vec3 x);")); s.append(TString("vec4 log2(vec4 x);")); s.append(TString("float sqrt(float x);")); s.append(TString("vec2 sqrt(vec2 x);")); s.append(TString("vec3 sqrt(vec3 x);")); s.append(TString("vec4 sqrt(vec4 x);")); s.append(TString("float inversesqrt(float x);")); s.append(TString("vec2 inversesqrt(vec2 x);")); s.append(TString("vec3 inversesqrt(vec3 x);")); s.append(TString("vec4 inversesqrt(vec4 x);")); // // Common Functions. // s.append(TString("float abs(float x);")); s.append(TString("vec2 abs(vec2 x);")); s.append(TString("vec3 abs(vec3 x);")); s.append(TString("vec4 abs(vec4 x);")); s.append(TString("float sign(float x);")); s.append(TString("vec2 sign(vec2 x);")); s.append(TString("vec3 sign(vec3 x);")); s.append(TString("vec4 sign(vec4 x);")); s.append(TString("float floor(float x);")); s.append(TString("vec2 floor(vec2 x);")); s.append(TString("vec3 floor(vec3 x);")); s.append(TString("vec4 floor(vec4 x);")); s.append(TString("float ceil(float x);")); s.append(TString("vec2 ceil(vec2 x);")); s.append(TString("vec3 ceil(vec3 x);")); s.append(TString("vec4 ceil(vec4 x);")); s.append(TString("float fract(float x);")); s.append(TString("vec2 fract(vec2 x);")); s.append(TString("vec3 fract(vec3 x);")); s.append(TString("vec4 fract(vec4 x);")); s.append(TString("float mod(float x, float y);")); s.append(TString("vec2 mod(vec2 x, float y);")); s.append(TString("vec3 mod(vec3 x, float y);")); s.append(TString("vec4 mod(vec4 x, float y);")); s.append(TString("vec2 mod(vec2 x, vec2 y);")); s.append(TString("vec3 mod(vec3 x, vec3 y);")); s.append(TString("vec4 mod(vec4 x, vec4 y);")); s.append(TString("float min(float x, float y);")); s.append(TString("vec2 min(vec2 x, float y);")); s.append(TString("vec3 min(vec3 x, float y);")); s.append(TString("vec4 min(vec4 x, float y);")); s.append(TString("vec2 min(vec2 x, vec2 y);")); s.append(TString("vec3 min(vec3 x, vec3 y);")); s.append(TString("vec4 min(vec4 x, vec4 y);")); s.append(TString("float max(float x, float y);")); s.append(TString("vec2 max(vec2 x, float y);")); s.append(TString("vec3 max(vec3 x, float y);")); s.append(TString("vec4 max(vec4 x, float y);")); s.append(TString("vec2 max(vec2 x, vec2 y);")); s.append(TString("vec3 max(vec3 x, vec3 y);")); s.append(TString("vec4 max(vec4 x, vec4 y);")); s.append(TString("float clamp(float x, float minVal, float maxVal);")); s.append(TString("vec2 clamp(vec2 x, float minVal, float maxVal);")); s.append(TString("vec3 clamp(vec3 x, float minVal, float maxVal);")); s.append(TString("vec4 clamp(vec4 x, float minVal, float maxVal);")); s.append(TString("vec2 clamp(vec2 x, vec2 minVal, vec2 maxVal);")); s.append(TString("vec3 clamp(vec3 x, vec3 minVal, vec3 maxVal);")); s.append(TString("vec4 clamp(vec4 x, vec4 minVal, vec4 maxVal);")); s.append(TString("float mix(float x, float y, float a);")); s.append(TString("vec2 mix(vec2 x, vec2 y, float a);")); s.append(TString("vec3 mix(vec3 x, vec3 y, float a);")); s.append(TString("vec4 mix(vec4 x, vec4 y, float a);")); s.append(TString("vec2 mix(vec2 x, vec2 y, vec2 a);")); s.append(TString("vec3 mix(vec3 x, vec3 y, vec3 a);")); s.append(TString("vec4 mix(vec4 x, vec4 y, vec4 a);")); s.append(TString("float step(float edge, float x);")); s.append(TString("vec2 step(vec2 edge, vec2 x);")); s.append(TString("vec3 step(vec3 edge, vec3 x);")); s.append(TString("vec4 step(vec4 edge, vec4 x);")); s.append(TString("vec2 step(float edge, vec2 x);")); s.append(TString("vec3 step(float edge, vec3 x);")); s.append(TString("vec4 step(float edge, vec4 x);")); s.append(TString("float smoothstep(float edge0, float edge1, float x);")); s.append(TString("vec2 smoothstep(vec2 edge0, vec2 edge1, vec2 x);")); s.append(TString("vec3 smoothstep(vec3 edge0, vec3 edge1, vec3 x);")); s.append(TString("vec4 smoothstep(vec4 edge0, vec4 edge1, vec4 x);")); s.append(TString("vec2 smoothstep(float edge0, float edge1, vec2 x);")); s.append(TString("vec3 smoothstep(float edge0, float edge1, vec3 x);")); s.append(TString("vec4 smoothstep(float edge0, float edge1, vec4 x);")); // // Geometric Functions. // s.append(TString("float length(float x);")); s.append(TString("float length(vec2 x);")); s.append(TString("float length(vec3 x);")); s.append(TString("float length(vec4 x);")); s.append(TString("float distance(float p0, float p1);")); s.append(TString("float distance(vec2 p0, vec2 p1);")); s.append(TString("float distance(vec3 p0, vec3 p1);")); s.append(TString("float distance(vec4 p0, vec4 p1);")); s.append(TString("float dot(float x, float y);")); s.append(TString("float dot(vec2 x, vec2 y);")); s.append(TString("float dot(vec3 x, vec3 y);")); s.append(TString("float dot(vec4 x, vec4 y);")); s.append(TString("vec3 cross(vec3 x, vec3 y);")); s.append(TString("float normalize(float x);")); s.append(TString("vec2 normalize(vec2 x);")); s.append(TString("vec3 normalize(vec3 x);")); s.append(TString("vec4 normalize(vec4 x);")); s.append(TString("float faceforward(float N, float I, float Nref);")); s.append(TString("vec2 faceforward(vec2 N, vec2 I, vec2 Nref);")); s.append(TString("vec3 faceforward(vec3 N, vec3 I, vec3 Nref);")); s.append(TString("vec4 faceforward(vec4 N, vec4 I, vec4 Nref);")); s.append(TString("float reflect(float I, float N);")); s.append(TString("vec2 reflect(vec2 I, vec2 N);")); s.append(TString("vec3 reflect(vec3 I, vec3 N);")); s.append(TString("vec4 reflect(vec4 I, vec4 N);")); s.append(TString("float refract(float I, float N, float eta);")); s.append(TString("vec2 refract(vec2 I, vec2 N, float eta);")); s.append(TString("vec3 refract(vec3 I, vec3 N, float eta);")); s.append(TString("vec4 refract(vec4 I, vec4 N, float eta);")); // // Matrix Functions. // s.append(TString("mat2 matrixCompMult(mat2 x, mat2 y);")); s.append(TString("mat3 matrixCompMult(mat3 x, mat3 y);")); s.append(TString("mat4 matrixCompMult(mat4 x, mat4 y);")); // // Vector relational functions. // s.append(TString("bvec2 lessThan(vec2 x, vec2 y);")); s.append(TString("bvec3 lessThan(vec3 x, vec3 y);")); s.append(TString("bvec4 lessThan(vec4 x, vec4 y);")); s.append(TString("bvec2 lessThan(ivec2 x, ivec2 y);")); s.append(TString("bvec3 lessThan(ivec3 x, ivec3 y);")); s.append(TString("bvec4 lessThan(ivec4 x, ivec4 y);")); s.append(TString("bvec2 lessThanEqual(vec2 x, vec2 y);")); s.append(TString("bvec3 lessThanEqual(vec3 x, vec3 y);")); s.append(TString("bvec4 lessThanEqual(vec4 x, vec4 y);")); s.append(TString("bvec2 lessThanEqual(ivec2 x, ivec2 y);")); s.append(TString("bvec3 lessThanEqual(ivec3 x, ivec3 y);")); s.append(TString("bvec4 lessThanEqual(ivec4 x, ivec4 y);")); s.append(TString("bvec2 greaterThan(vec2 x, vec2 y);")); s.append(TString("bvec3 greaterThan(vec3 x, vec3 y);")); s.append(TString("bvec4 greaterThan(vec4 x, vec4 y);")); s.append(TString("bvec2 greaterThan(ivec2 x, ivec2 y);")); s.append(TString("bvec3 greaterThan(ivec3 x, ivec3 y);")); s.append(TString("bvec4 greaterThan(ivec4 x, ivec4 y);")); s.append(TString("bvec2 greaterThanEqual(vec2 x, vec2 y);")); s.append(TString("bvec3 greaterThanEqual(vec3 x, vec3 y);")); s.append(TString("bvec4 greaterThanEqual(vec4 x, vec4 y);")); s.append(TString("bvec2 greaterThanEqual(ivec2 x, ivec2 y);")); s.append(TString("bvec3 greaterThanEqual(ivec3 x, ivec3 y);")); s.append(TString("bvec4 greaterThanEqual(ivec4 x, ivec4 y);")); s.append(TString("bvec2 equal(vec2 x, vec2 y);")); s.append(TString("bvec3 equal(vec3 x, vec3 y);")); s.append(TString("bvec4 equal(vec4 x, vec4 y);")); s.append(TString("bvec2 equal(ivec2 x, ivec2 y);")); s.append(TString("bvec3 equal(ivec3 x, ivec3 y);")); s.append(TString("bvec4 equal(ivec4 x, ivec4 y);")); s.append(TString("bvec2 equal(bvec2 x, bvec2 y);")); s.append(TString("bvec3 equal(bvec3 x, bvec3 y);")); s.append(TString("bvec4 equal(bvec4 x, bvec4 y);")); s.append(TString("bvec2 notEqual(vec2 x, vec2 y);")); s.append(TString("bvec3 notEqual(vec3 x, vec3 y);")); s.append(TString("bvec4 notEqual(vec4 x, vec4 y);")); s.append(TString("bvec2 notEqual(ivec2 x, ivec2 y);")); s.append(TString("bvec3 notEqual(ivec3 x, ivec3 y);")); s.append(TString("bvec4 notEqual(ivec4 x, ivec4 y);")); s.append(TString("bvec2 notEqual(bvec2 x, bvec2 y);")); s.append(TString("bvec3 notEqual(bvec3 x, bvec3 y);")); s.append(TString("bvec4 notEqual(bvec4 x, bvec4 y);")); s.append(TString("bool any(bvec2 x);")); s.append(TString("bool any(bvec3 x);")); s.append(TString("bool any(bvec4 x);")); s.append(TString("bool all(bvec2 x);")); s.append(TString("bool all(bvec3 x);")); s.append(TString("bool all(bvec4 x);")); s.append(TString("bvec2 not(bvec2 x);")); s.append(TString("bvec3 not(bvec3 x);")); s.append(TString("bvec4 not(bvec4 x);")); // // Noise functions. // //s.append(TString("float noise1(float x);")); //s.append(TString("float noise1(vec2 x);")); //s.append(TString("float noise1(vec3 x);")); //s.append(TString("float noise1(vec4 x);")); //s.append(TString("vec2 noise2(float x);")); //s.append(TString("vec2 noise2(vec2 x);")); //s.append(TString("vec2 noise2(vec3 x);")); //s.append(TString("vec2 noise2(vec4 x);")); //s.append(TString("vec3 noise3(float x);")); //s.append(TString("vec3 noise3(vec2 x);")); //s.append(TString("vec3 noise3(vec3 x);")); //s.append(TString("vec3 noise3(vec4 x);")); //s.append(TString("vec4 noise4(float x);")); //s.append(TString("vec4 noise4(vec2 x);")); //s.append(TString("vec4 noise4(vec3 x);")); //s.append(TString("vec4 noise4(vec4 x);")); return s; } //============================================================================ // // Prototypes for built-in functions seen by vertex shaders only. // //============================================================================ static TString BuiltInFunctionsVertex(const TBuiltInResource& resources) { TString s; // // Geometric Functions. // //s.append(TString("vec4 ftransform();")); // // Texture Functions. // if (resources.MaxVertexTextureImageUnits > 0) { s.append(TString("vec4 texture2D(sampler2D sampler, vec2 coord);")); s.append(TString("vec4 texture2DProj(sampler2D sampler, vec3 coord);")); s.append(TString("vec4 texture2DProj(sampler2D sampler, vec4 coord);")); s.append(TString("vec4 textureCube(samplerCube sampler, vec3 coord);")); s.append(TString("vec4 texture2DLod(sampler2D sampler, vec2 coord, float lod);")); s.append(TString("vec4 texture2DProjLod(sampler2D sampler, vec3 coord, float lod);")); s.append(TString("vec4 texture2DProjLod(sampler2D sampler, vec4 coord, float lod);")); s.append(TString("vec4 textureCubeLod(samplerCube sampler, vec3 coord, float lod);")); } return s; } //============================================================================ // // Prototypes for built-in functions seen by fragment shaders only. // //============================================================================ static TString BuiltInFunctionsFragment(const TBuiltInResource& resources) { TString s; // // Texture Functions. // s.append(TString("vec4 texture2D(sampler2D sampler, vec2 coord);")); s.append(TString("vec4 texture2DProj(sampler2D sampler, vec3 coord);")); s.append(TString("vec4 texture2DProj(sampler2D sampler, vec4 coord);")); s.append(TString("vec4 textureCube(samplerCube sampler, vec3 coord);")); s.append(TString("vec4 texture2D(sampler2D sampler, vec2 coord, float bias);")); s.append(TString("vec4 texture2DProj(sampler2D sampler, vec3 coord, float bias);")); s.append(TString("vec4 texture2DProj(sampler2D sampler, vec4 coord, float bias);")); s.append(TString("vec4 textureCube(samplerCube sampler, vec3 coord, float bias);")); if (resources.OES_standard_derivatives) { s.append(TString("float dFdx(float p);")); s.append(TString("vec2 dFdx(vec2 p);")); s.append(TString("vec3 dFdx(vec3 p);")); s.append(TString("vec4 dFdx(vec4 p);")); s.append(TString("float dFdy(float p);")); s.append(TString("vec2 dFdy(vec2 p);")); s.append(TString("vec3 dFdy(vec3 p);")); s.append(TString("vec4 dFdy(vec4 p);")); s.append(TString("float fwidth(float p);")); s.append(TString("vec2 fwidth(vec2 p);")); s.append(TString("vec3 fwidth(vec3 p);")); s.append(TString("vec4 fwidth(vec4 p);")); } return s; } //============================================================================ // // Standard uniforms. // //============================================================================ static TString StandardUniforms() { TString s; // // Depth range in window coordinates // s.append(TString("struct gl_DepthRangeParameters {")); s.append(TString(" highp float near;")); // n s.append(TString(" highp float far;")); // f s.append(TString(" highp float diff;")); // f - n s.append(TString("};")); s.append(TString("uniform gl_DepthRangeParameters gl_DepthRange;")); return s; } //============================================================================ // // Default precision for vertex shaders. // //============================================================================ static TString DefaultPrecisionVertex() { TString s; s.append(TString("precision highp int;")); s.append(TString("precision highp float;")); return s; } //============================================================================ // // Default precision for fragment shaders. // //============================================================================ static TString DefaultPrecisionFragment() { TString s; s.append(TString("precision mediump int;")); // No default precision for float in fragment shaders return s; } //============================================================================ // // Implementation dependent built-in constants. // //============================================================================ static TString BuiltInConstants(const TBuiltInResource &resources) { TStringStream s; s << "const int gl_MaxVertexAttribs = " << resources.MaxVertexAttribs << ";"; s << "const int gl_MaxVertexUniformVectors = " << resources.MaxVertexUniformVectors << ";"; s << "const int gl_MaxVaryingVectors = " << resources.MaxVaryingVectors << ";"; s << "const int gl_MaxVertexTextureImageUnits = " << resources.MaxVertexTextureImageUnits << ";"; s << "const int gl_MaxCombinedTextureImageUnits = " << resources.MaxCombinedTextureImageUnits << ";"; s << "const int gl_MaxTextureImageUnits = " << resources.MaxTextureImageUnits << ";"; s << "const int gl_MaxFragmentUniformVectors = " << resources.MaxFragmentUniformVectors << ";"; s << "const int gl_MaxDrawBuffers = " << resources.MaxDrawBuffers << ";"; return s.str(); } void TBuiltIns::initialize(EShLanguage language, EShSpec spec, const TBuiltInResource& resources) { switch (language) { case EShLangFragment: builtInStrings.push_back(DefaultPrecisionFragment()); builtInStrings.push_back(BuiltInFunctionsCommon()); builtInStrings.push_back(BuiltInFunctionsFragment(resources)); builtInStrings.push_back(StandardUniforms()); break; case EShLangVertex: builtInStrings.push_back(DefaultPrecisionVertex()); builtInStrings.push_back(BuiltInFunctionsCommon()); builtInStrings.push_back(BuiltInFunctionsVertex(resources)); builtInStrings.push_back(StandardUniforms()); break; default: assert(false && "Language not supported"); } builtInStrings.push_back(BuiltInConstants(resources)); } void IdentifyBuiltIns(EShLanguage language, EShSpec spec, const TBuiltInResource& resources, TSymbolTable& symbolTable) { // // First, insert some special built-in variables that are not in // the built-in header files. // switch(language) { case EShLangFragment: symbolTable.insert(*new TVariable(NewPoolTString("gl_FragCoord"), TType(EbtFloat, EbpMedium, EvqFragCoord, 4))); symbolTable.insert(*new TVariable(NewPoolTString("gl_FrontFacing"), TType(EbtBool, EbpUndefined, EvqFrontFacing, 1))); symbolTable.insert(*new TVariable(NewPoolTString("gl_FragColor"), TType(EbtFloat, EbpMedium, EvqFragColor, 4))); symbolTable.insert(*new TVariable(NewPoolTString("gl_FragData[gl_MaxDrawBuffers]"), TType(EbtFloat, EbpMedium, EvqFragData, 4))); symbolTable.insert(*new TVariable(NewPoolTString("gl_PointCoord"), TType(EbtFloat, EbpMedium, EvqPointCoord, 2))); break; case EShLangVertex: symbolTable.insert(*new TVariable(NewPoolTString("gl_Position"), TType(EbtFloat, EbpHigh, EvqPosition, 4))); symbolTable.insert(*new TVariable(NewPoolTString("gl_PointSize"), TType(EbtFloat, EbpMedium, EvqPointSize, 1))); break; default: assert(false && "Language not supported"); } // // Next, identify which built-ins from the already loaded headers have // a mapping to an operator. Those that are not identified as such are // expected to be resolved through a library of functions, versus as // operations. // symbolTable.relateToOperator("not", EOpVectorLogicalNot); symbolTable.relateToOperator("matrixCompMult", EOpMul); symbolTable.relateToOperator("equal", EOpVectorEqual); symbolTable.relateToOperator("notEqual", EOpVectorNotEqual); symbolTable.relateToOperator("lessThan", EOpLessThan); symbolTable.relateToOperator("greaterThan", EOpGreaterThan); symbolTable.relateToOperator("lessThanEqual", EOpLessThanEqual); symbolTable.relateToOperator("greaterThanEqual", EOpGreaterThanEqual); symbolTable.relateToOperator("radians", EOpRadians); symbolTable.relateToOperator("degrees", EOpDegrees); symbolTable.relateToOperator("sin", EOpSin); symbolTable.relateToOperator("cos", EOpCos); symbolTable.relateToOperator("tan", EOpTan); symbolTable.relateToOperator("asin", EOpAsin); symbolTable.relateToOperator("acos", EOpAcos); symbolTable.relateToOperator("atan", EOpAtan); symbolTable.relateToOperator("pow", EOpPow); symbolTable.relateToOperator("exp2", EOpExp2); symbolTable.relateToOperator("log", EOpLog); symbolTable.relateToOperator("exp", EOpExp); symbolTable.relateToOperator("log2", EOpLog2); symbolTable.relateToOperator("sqrt", EOpSqrt); symbolTable.relateToOperator("inversesqrt", EOpInverseSqrt); symbolTable.relateToOperator("abs", EOpAbs); symbolTable.relateToOperator("sign", EOpSign); symbolTable.relateToOperator("floor", EOpFloor); symbolTable.relateToOperator("ceil", EOpCeil); symbolTable.relateToOperator("fract", EOpFract); symbolTable.relateToOperator("mod", EOpMod); symbolTable.relateToOperator("min", EOpMin); symbolTable.relateToOperator("max", EOpMax); symbolTable.relateToOperator("clamp", EOpClamp); symbolTable.relateToOperator("mix", EOpMix); symbolTable.relateToOperator("step", EOpStep); symbolTable.relateToOperator("smoothstep", EOpSmoothStep); symbolTable.relateToOperator("length", EOpLength); symbolTable.relateToOperator("distance", EOpDistance); symbolTable.relateToOperator("dot", EOpDot); symbolTable.relateToOperator("cross", EOpCross); symbolTable.relateToOperator("normalize", EOpNormalize); symbolTable.relateToOperator("faceforward", EOpFaceForward); symbolTable.relateToOperator("reflect", EOpReflect); symbolTable.relateToOperator("refract", EOpRefract); symbolTable.relateToOperator("any", EOpAny); symbolTable.relateToOperator("all", EOpAll); // Map language-specific operators. switch(language) { case EShLangVertex: break; case EShLangFragment: if (resources.OES_standard_derivatives) { symbolTable.relateToOperator("dFdx", EOpDFdx); symbolTable.relateToOperator("dFdy", EOpDFdy); symbolTable.relateToOperator("fwidth", EOpFwidth); symbolTable.relateToExtension("dFdx", "GL_OES_standard_derivatives"); symbolTable.relateToExtension("dFdy", "GL_OES_standard_derivatives"); symbolTable.relateToExtension("fwidth", "GL_OES_standard_derivatives"); } break; default: break; } // Finally add resource-specific variables. switch(language) { case EShLangFragment: { // Set up gl_FragData. The array size. TType fragData(EbtFloat, EbpMedium, EvqFragColor, 4, false, true); fragData.setArraySize(resources.MaxDrawBuffers); symbolTable.insert(*new TVariable(NewPoolTString("gl_FragData"), fragData)); } break; default: break; } } void InitExtensionBehavior(const TBuiltInResource& resources, TExtensionBehavior& extBehavior) { if (resources.OES_standard_derivatives) extBehavior["GL_OES_standard_derivatives"] = EBhDisable; }