chromium/third_party/angle/src/compiler/translator/tree_ops/RemoveInactiveInterfaceVariables.cpp

//
// Copyright 2019 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.
//
// RemoveInactiveInterfaceVariables.h:
//  Drop shader interface variable declarations for those that are inactive.
//

#include "compiler/translator/tree_ops/RemoveInactiveInterfaceVariables.h"

#include "compiler/translator/SymbolTable.h"
#include "compiler/translator/tree_util/IntermTraverse.h"
#include "compiler/translator/util.h"

namespace sh
{

namespace
{

// Traverser that removes all declarations that correspond to inactive variables.
class RemoveInactiveInterfaceVariablesTraverser : public TIntermTraverser
{ … };

RemoveInactiveInterfaceVariablesTraverser::RemoveInactiveInterfaceVariablesTraverser(
    TSymbolTable *symbolTable,
    const std::vector<sh::ShaderVariable> &attributes,
    const std::vector<sh::ShaderVariable> &inputVaryings,
    const std::vector<sh::ShaderVariable> &outputVariables,
    const std::vector<sh::ShaderVariable> &uniforms,
    const std::vector<sh::InterfaceBlock> &interfaceBlocks,
    bool removeFragmentOutputs)
    : … { … }

template <typename Variable>
bool IsVariableActive(const std::vector<Variable> &mVars, const ImmutableString &name)
{ … }

bool RemoveInactiveInterfaceVariablesTraverser::visitDeclaration(Visit visit,
                                                                 TIntermDeclaration *node)
{ … }

bool RemoveInactiveInterfaceVariablesTraverser::visitBinary(Visit visit, TIntermBinary *node)
{ … }

}  // namespace

bool RemoveInactiveInterfaceVariables(TCompiler *compiler,
                                      TIntermBlock *root,
                                      TSymbolTable *symbolTable,
                                      const std::vector<sh::ShaderVariable> &attributes,
                                      const std::vector<sh::ShaderVariable> &inputVaryings,
                                      const std::vector<sh::ShaderVariable> &outputVariables,
                                      const std::vector<sh::ShaderVariable> &uniforms,
                                      const std::vector<sh::InterfaceBlock> &interfaceBlocks,
                                      bool removeFragmentOutputs)
{ … }

}  // namespace sh