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Diffstat (limited to 'src/3rdparty/angle/src/compiler/translator/BuiltInFunctionEmulator.h')
-rw-r--r-- | src/3rdparty/angle/src/compiler/translator/BuiltInFunctionEmulator.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/translator/BuiltInFunctionEmulator.h b/src/3rdparty/angle/src/compiler/translator/BuiltInFunctionEmulator.h new file mode 100644 index 0000000000..cfb71a803a --- /dev/null +++ b/src/3rdparty/angle/src/compiler/translator/BuiltInFunctionEmulator.h @@ -0,0 +1,93 @@ +// +// Copyright (c) 2011 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. +// + +#ifndef COMPILIER_BUILT_IN_FUNCTION_EMULATOR_H_ +#define COMPILIER_BUILT_IN_FUNCTION_EMULATOR_H_ + +#include "GLSLANG/ShaderLang.h" + +#include "compiler/translator/InfoSink.h" +#include "compiler/translator/intermediate.h" + +// +// This class decides which built-in functions need to be replaced with the +// emulated ones. +// It's only a workaround for OpenGL driver bugs, and isn't needed in general. +// +class BuiltInFunctionEmulator { +public: + BuiltInFunctionEmulator(ShShaderType shaderType); + // Records that a function is called by the shader and might needs to be + // emulated. If the function's group is not in mFunctionGroupFilter, this + // becomes an no-op. + // Returns true if the function call needs to be replaced with an emulated + // one. + bool SetFunctionCalled(TOperator op, const TType& param); + bool SetFunctionCalled( + TOperator op, const TType& param1, const TType& param2); + + // Output function emulation definition. This should be before any other + // shader source. + void OutputEmulatedFunctionDefinition(TInfoSinkBase& out, bool withPrecision) const; + + void MarkBuiltInFunctionsForEmulation(TIntermNode* root); + + void Cleanup(); + + // "name(" becomes "webgl_name_emu(". + static TString GetEmulatedFunctionName(const TString& name); + +private: + // + // Built-in functions. + // + enum TBuiltInFunction { + TFunctionCos1 = 0, // float cos(float); + TFunctionCos2, // vec2 cos(vec2); + TFunctionCos3, // vec3 cos(vec3); + TFunctionCos4, // vec4 cos(vec4); + + TFunctionDistance1_1, // float distance(float, float); + TFunctionDistance2_2, // vec2 distance(vec2, vec2); + TFunctionDistance3_3, // vec3 distance(vec3, vec3); + TFunctionDistance4_4, // vec4 distance(vec4, vec4); + + TFunctionDot1_1, // float dot(float, float); + TFunctionDot2_2, // vec2 dot(vec2, vec2); + TFunctionDot3_3, // vec3 dot(vec3, vec3); + TFunctionDot4_4, // vec4 dot(vec4, vec4); + + TFunctionLength1, // float length(float); + TFunctionLength2, // float length(vec2); + TFunctionLength3, // float length(vec3); + TFunctionLength4, // float length(vec4); + + TFunctionNormalize1, // float normalize(float); + TFunctionNormalize2, // vec2 normalize(vec2); + TFunctionNormalize3, // vec3 normalize(vec3); + TFunctionNormalize4, // vec4 normalize(vec4); + + TFunctionReflect1_1, // float reflect(float, float); + TFunctionReflect2_2, // vec2 reflect(vec2, vec2); + TFunctionReflect3_3, // vec3 reflect(vec3, vec3); + TFunctionReflect4_4, // vec4 reflect(vec4, vec4); + + TFunctionUnknown + }; + + TBuiltInFunction IdentifyFunction(TOperator op, const TType& param); + TBuiltInFunction IdentifyFunction( + TOperator op, const TType& param1, const TType& param2); + + bool SetFunctionCalled(TBuiltInFunction function); + + std::vector<TBuiltInFunction> mFunctions; + + const bool* mFunctionMask; // a boolean flag for each function. + const char** mFunctionSource; +}; + +#endif // COMPILIER_BUILT_IN_FUNCTION_EMULATOR_H_ |