| /* |
| * 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_DSL_FUNCTION |
| #define SKSL_DSL_FUNCTION |
| |
| #include "src/sksl/SkSLIRGenerator.h" |
| #include "src/sksl/SkSLString.h" |
| #include "src/sksl/dsl/DSLBlock.h" |
| #include "src/sksl/dsl/DSLType.h" |
| #include "src/sksl/dsl/priv/DSLWriter.h" |
| #include "src/sksl/ir/SkSLBlock.h" |
| #include "src/sksl/ir/SkSLFunctionDefinition.h" |
| |
| namespace SkSL { |
| |
| class Block; |
| class Variable; |
| |
| namespace dsl { |
| |
| class DSLType; |
| |
| class DSLFunction { |
| public: |
| template<class... Parameters> |
| DSLFunction(const DSLType& returnType, const char* name, Parameters&... parameters) |
| : fReturnType(&returnType.skslType()) { |
| std::vector<const Variable*> parameterArray; |
| parameterArray.reserve(sizeof...(parameters)); |
| (parameterArray.push_back(&DSLWriter::Var(parameters)), ...); |
| SkSL::SymbolTable& symbols = *DSLWriter::SymbolTable(); |
| fDecl = symbols.add(std::make_unique<SkSL::FunctionDeclaration>( |
| /*offset=*/-1, |
| DSLWriter::Modifiers(SkSL::Modifiers()), |
| DSLWriter::Name(name), |
| std::move(parameterArray), fReturnType, |
| /*builtin=*/false)); |
| } |
| |
| virtual ~DSLFunction() = default; |
| |
| template<class... Stmt> |
| void define(Stmt... stmts) { |
| DSLBlock block = DSLBlock(DSLStatement(std::move(stmts))...); |
| this->define(std::move(block)); |
| } |
| |
| void define(DSLBlock block); |
| |
| template<class... Args> |
| DSLExpression operator()(Args... args) { |
| ExpressionArray argArray; |
| argArray.reserve_back(sizeof...(args)); |
| int unused[] = {0, (DSLWriter::Ignore(argArray.push_back(args.release())), 0)...}; |
| static_cast<void>(unused); |
| return DSLWriter::IRGenerator().call(/*offset=*/-1, *fDecl, std::move(argArray)); |
| } |
| |
| protected: |
| const SkSL::Type* fReturnType; |
| const SkSL::FunctionDeclaration* fDecl; |
| }; |
| |
| } // namespace dsl |
| |
| } // namespace SkSL |
| |
| #endif |