1 /* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SKSL_SETTING 9 #define SKSL_SETTING 10 11 #include "SkSLContext.h" 12 #include "SkSLExpression.h" 13 14 namespace SkSL { 15 16 /** 17 * Represents a compile-time constant setting, such as sk_Caps.fbFetchSupport. These are generally 18 * collapsed down to their constant representations during the compilation process. 19 */ 20 struct Setting : public Expression { SettingSetting21 Setting(int offset, String name, std::unique_ptr<Expression> value) 22 : INHERITED(offset, kSetting_Kind, value->fType) 23 , fName(std::move(name)) 24 , fValue(std::move(value)) { 25 SkASSERT(fValue->isConstant()); 26 } 27 28 std::unique_ptr<Expression> constantPropagate(const IRGenerator& irGenerator, 29 const DefinitionMap& definitions) override; 30 cloneSetting31 std::unique_ptr<Expression> clone() const override { 32 return std::unique_ptr<Expression>(new Setting(fOffset, fName, fValue->clone())); 33 } 34 descriptionSetting35 String description() const override { 36 return fName; 37 } 38 hasSideEffectsSetting39 bool hasSideEffects() const override { 40 return false; 41 } 42 isConstantSetting43 bool isConstant() const override { 44 return true; 45 } 46 47 const String fName; 48 std::unique_ptr<Expression> fValue; 49 50 typedef Expression INHERITED; 51 }; 52 53 } // namespace 54 55 #endif 56