1 /* 2 * Copyright 2021 Google LLC 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_CONSTRUCTOR_DIAGONAL_MATRIX 9 #define SKSL_CONSTRUCTOR_DIAGONAL_MATRIX 10 11 #include "include/private/SkSLIRNode.h" 12 #include "include/sksl/SkSLPosition.h" 13 #include "src/sksl/ir/SkSLConstructor.h" 14 #include "src/sksl/ir/SkSLExpression.h" 15 16 #include <memory> 17 #include <optional> 18 #include <utility> 19 20 namespace SkSL { 21 22 class Context; 23 class Type; 24 25 /** 26 * Represents the construction of a diagonal matrix, such as `half3x3(n)`. 27 * 28 * These always contain exactly 1 scalar. 29 */ 30 class ConstructorDiagonalMatrix final : public SingleArgumentConstructor { 31 public: 32 inline static constexpr Kind kIRNodeKind = Kind::kConstructorDiagonalMatrix; 33 ConstructorDiagonalMatrix(Position pos,const Type & type,std::unique_ptr<Expression> arg)34 ConstructorDiagonalMatrix(Position pos, const Type& type, std::unique_ptr<Expression> arg) 35 : INHERITED(pos, kIRNodeKind, &type, std::move(arg)) {} 36 37 static std::unique_ptr<Expression> Make(const Context& context, 38 Position pos, 39 const Type& type, 40 std::unique_ptr<Expression> arg); 41 clone(Position pos)42 std::unique_ptr<Expression> clone(Position pos) const override { 43 return std::make_unique<ConstructorDiagonalMatrix>(pos, this->type(), argument()->clone()); 44 } 45 supportsConstantValues()46 bool supportsConstantValues() const override { return true; } 47 std::optional<double> getConstantValue(int n) const override; 48 49 private: 50 using INHERITED = SingleArgumentConstructor; 51 }; 52 53 } // namespace SkSL 54 55 #endif 56