| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SKSL_CONSTRUCTOR |
| #define SKSL_CONSTRUCTOR |
| |
| #include "include/private/SkTArray.h" |
| #include "src/sksl/SkSLIRGenerator.h" |
| #include "src/sksl/ir/SkSLExpression.h" |
| #include "src/sksl/ir/SkSLFloatLiteral.h" |
| #include "src/sksl/ir/SkSLIntLiteral.h" |
| #include "src/sksl/ir/SkSLPrefixExpression.h" |
| |
| namespace SkSL { |
| |
| /** |
| * Represents the construction of a compound type, such as "float2(x, y)". |
| * |
| * Vector constructors will always consist of either exactly 1 scalar, or a collection of vectors |
| * and scalars totalling exactly the right number of scalar components. |
| * |
| * Matrix constructors will always consist of either exactly 1 scalar, exactly 1 matrix, or a |
| * collection of vectors and scalars totalling exactly the right number of scalar components. |
| */ |
| class Constructor : public Expression { |
| public: |
| static constexpr Kind kExpressionKind = Kind::kConstructor; |
| |
| Constructor(int offset, const Type* type, ExpressionArray arguments) |
| : INHERITED(offset, kExpressionKind, type) { |
| fExpressionChildren = std::move(arguments); |
| } |
| |
| ExpressionArray& arguments() { |
| return fExpressionChildren; |
| } |
| |
| const ExpressionArray& arguments() const { |
| return fExpressionChildren; |
| } |
| |
| std::unique_ptr<Expression> constantPropagate(const IRGenerator& irGenerator, |
| const DefinitionMap& definitions) override; |
| |
| bool hasProperty(Property property) const override { |
| for (const std::unique_ptr<Expression>& arg: this->arguments()) { |
| if (arg->hasProperty(property)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| std::unique_ptr<Expression> clone() const override { |
| ExpressionArray cloned; |
| cloned.reserve_back(this->arguments().size()); |
| for (const std::unique_ptr<Expression>& arg: this->arguments()) { |
| cloned.push_back(arg->clone()); |
| } |
| return std::make_unique<Constructor>(fOffset, &this->type(), std::move(cloned)); |
| } |
| |
| String description() const override { |
| String result = this->type().description() + "("; |
| const char* separator = ""; |
| for (const std::unique_ptr<Expression>& arg: this->arguments()) { |
| result += separator; |
| result += arg->description(); |
| separator = ", "; |
| } |
| result += ")"; |
| return result; |
| } |
| |
| bool isCompileTimeConstant() const override { |
| for (const std::unique_ptr<Expression>& arg: this->arguments()) { |
| if (!arg->isCompileTimeConstant()) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool isConstantOrUniform() const override { |
| for (const std::unique_ptr<Expression>& arg: this->arguments()) { |
| if (!arg->isConstantOrUniform()) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool compareConstant(const Context& context, const Expression& other) const override; |
| |
| template <typename resultType> |
| resultType getVecComponent(int index) const; |
| |
| SKSL_FLOAT getFVecComponent(int n) const override { |
| return this->getVecComponent<SKSL_FLOAT>(n); |
| } |
| |
| /** |
| * For a literal vector expression, return the integer value of the n'th vector component. It is |
| * an error to call this method on an expression which is not a literal vector. |
| */ |
| SKSL_INT getIVecComponent(int n) const override { |
| return this->getVecComponent<SKSL_INT>(n); |
| } |
| |
| SKSL_FLOAT getMatComponent(int col, int row) const override; |
| |
| private: |
| using INHERITED = Expression; |
| }; |
| |
| } // namespace SkSL |
| |
| #endif |