// // Copyright 2002 The ANGLE Project Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // #ifndef COMPILER_TRANSLATOR_TREEOPS_INITIALIZEVARIABLES_H_ #define COMPILER_TRANSLATOR_TREEOPS_INITIALIZEVARIABLES_H_ #include <GLSLANG/ShaderLang.h> #include "compiler/translator/ExtensionBehavior.h" #include "compiler/translator/IntermNode.h" namespace sh { class TCompiler; class TSymbolTable; InitVariableList; // For all of the functions below: If canUseLoopsToInitialize is set, for loops are used instead of // a large number of initializers where it can make sense, such as for initializing large arrays. // Populate a sequence of assignment operations to initialize "initializedSymbol". initializedSymbol // may be an array, struct or any combination of these, as long as it contains only basic types. void CreateInitCode(const TIntermTyped *initializedSymbol, bool canUseLoopsToInitialize, bool highPrecisionSupported, TIntermSequence *initCode, TSymbolTable *symbolTable); // Initialize all uninitialized local variables, so that undefined behavior is avoided. [[nodiscard]] bool InitializeUninitializedLocals(TCompiler *compiler, TIntermBlock *root, int shaderVersion, bool canUseLoopsToInitialize, bool highPrecisionSupported, TSymbolTable *symbolTable); // This function can initialize all the types that CreateInitCode is able to initialize. All // variables must be globals which can be found in the symbol table. For now it is used for the // following two scenarios: // 1. Initializing gl_Position; // 2. Initializing output variables referred to in the shader source. // Note: The type of each lvalue in an initializer is retrieved from the symbol table. gl_FragData // requires special handling because the number of indices which can be initialized is determined by // enabled extensions. [[nodiscard]] bool InitializeVariables(TCompiler *compiler, TIntermBlock *root, const InitVariableList &vars, TSymbolTable *symbolTable, int shaderVersion, const TExtensionBehavior &extensionBehavior, bool canUseLoopsToInitialize, bool highPrecisionSupported); } // namespace sh #endif // COMPILER_TRANSLATOR_TREEOPS_INITIALIZEVARIABLES_H_