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//
// Copyright (c) 2013 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.
//
// FlagStd140Structs.cpp: Find structs in std140 blocks, where the padding added in the translator
// conflicts with the "natural" unpadded type.
#include "compiler/translator/FlagStd140Structs.h"
#include "compiler/translator/SymbolTable.h"
#include "compiler/translator/tree_util/IntermTraverse.h"
namespace sh
{
namespace
{
class FlagStd140StructsTraverser : public TIntermTraverser
{
public:
FlagStd140StructsTraverser() : TIntermTraverser(true, false, false) {}
const std::vector<MappedStruct> getMappedStructs() const { return mMappedStructs; }
protected:
bool visitDeclaration(Visit visit, TIntermDeclaration *node) override;
private:
void mapBlockStructMembers(TIntermSymbol *blockDeclarator, const TInterfaceBlock *block);
std::vector<MappedStruct> mMappedStructs;
};
void FlagStd140StructsTraverser::mapBlockStructMembers(TIntermSymbol *blockDeclarator,
const TInterfaceBlock *block)
{
for (auto *field : block->fields())
{
if (field->type()->getBasicType() == EbtStruct)
{
MappedStruct mappedStruct;
mappedStruct.blockDeclarator = blockDeclarator;
mappedStruct.field = field;
mMappedStructs.push_back(mappedStruct);
}
}
}
bool FlagStd140StructsTraverser::visitDeclaration(Visit visit, TIntermDeclaration *node)
{
TIntermTyped *declarator = node->getSequence()->back()->getAsTyped();
if (declarator->getBasicType() == EbtInterfaceBlock)
{
const TInterfaceBlock *block = declarator->getType().getInterfaceBlock();
if (block->blockStorage() == EbsStd140)
{
mapBlockStructMembers(declarator->getAsSymbolNode(), block);
}
}
return false;
}
} // anonymous namespace
std::vector<MappedStruct> FlagStd140Structs(TIntermNode *node)
{
FlagStd140StructsTraverser flaggingTraversal;
node->traverse(&flaggingTraversal);
return flaggingTraversal.getMappedStructs();
}
} // namespace sh
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