| /* |
| * Copyright 2021 Google LLC |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SKSL_CONSTRUCTOR_DIAGONAL_MATRIX |
| #define SKSL_CONSTRUCTOR_DIAGONAL_MATRIX |
| |
| #include "include/private/SkSLDefines.h" |
| #include "src/sksl/SkSLContext.h" |
| #include "src/sksl/ir/SkSLConstructor.h" |
| #include "src/sksl/ir/SkSLExpression.h" |
| |
| #include <memory> |
| |
| namespace SkSL { |
| |
| /** |
| * Represents the construction of a diagonal matrix, such as `half3x3(n)`. |
| * |
| * These always contain exactly 1 scalar. |
| */ |
| class ConstructorDiagonalMatrix final : public SingleArgumentConstructor { |
| public: |
| static constexpr Kind kExpressionKind = Kind::kConstructorDiagonalMatrix; |
| |
| ConstructorDiagonalMatrix(int offset, const Type& type, std::unique_ptr<Expression> arg) |
| : INHERITED(offset, kExpressionKind, &type, std::move(arg)) |
| , fZeroLiteral(offset, /*value=*/0.0f, &type.componentType()) {} |
| |
| static std::unique_ptr<Expression> Make(const Context& context, |
| int offset, |
| const Type& type, |
| std::unique_ptr<Expression> arg); |
| |
| std::unique_ptr<Expression> clone() const override { |
| return std::make_unique<ConstructorDiagonalMatrix>(fOffset, this->type(), |
| argument()->clone()); |
| } |
| |
| bool allowsConstantSubexpressions() const override { return true; } |
| const Expression* getConstantSubexpression(int n) const override; |
| |
| private: |
| const FloatLiteral fZeroLiteral; |
| using INHERITED = SingleArgumentConstructor; |
| }; |
| |
| } // namespace SkSL |
| |
| #endif |