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//
// Copyright (c) 2002-2010 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_UTIL_H_
#define COMPILER_TRANSLATOR_UTIL_H_
#include <stack>
#include "angle_gl.h"
#include <GLSLANG/ShaderLang.h>
#include "compiler/translator/Operator.h"
#include "compiler/translator/Types.h"
// strtof_clamp is like strtof but
// 1. it forces C locale, i.e. forcing '.' as decimal point.
// 2. it clamps the value to -FLT_MAX or FLT_MAX if overflow happens.
// Return false if overflow happens.
bool strtof_clamp(const std::string &str, float *value);
// If overflow happens, clamp the value to UINT_MIN or UINT_MAX.
// Return false if overflow happens.
bool atoi_clamp(const char *str, unsigned int *value);
namespace sh
{
class TSymbolTable;
GLenum GLVariableType(const TType &type);
GLenum GLVariablePrecision(const TType &type);
bool IsVaryingIn(TQualifier qualifier);
bool IsVaryingOut(TQualifier qualifier);
bool IsVarying(TQualifier qualifier);
InterpolationType GetInterpolationType(TQualifier qualifier);
TString ArrayString(const TType &type);
TType GetShaderVariableBasicType(const sh::ShaderVariable &var);
TOperator TypeToConstructorOperator(const TType &type);
class GetVariableTraverser : angle::NonCopyable
{
public:
GetVariableTraverser(const TSymbolTable &symbolTable);
virtual ~GetVariableTraverser() {}
template <typename VarT>
void traverse(const TType &type, const TString &name, std::vector<VarT> *output);
protected:
// May be overloaded
virtual void visitVariable(ShaderVariable *newVar) {}
private:
// Helper function called by traverse() to fill specific fields
// for attributes/varyings/uniforms.
template <typename VarT>
void setTypeSpecificInfo(
const TType &type, const TString &name, VarT *variable) {}
const TSymbolTable &mSymbolTable;
};
bool IsBuiltinOutputVariable(TQualifier qualifier);
bool IsBuiltinFragmentInputVariable(TQualifier qualifier);
bool CanBeInvariantESSL1(TQualifier qualifier);
bool CanBeInvariantESSL3OrGreater(TQualifier qualifier);
} // namespace sh
#endif // COMPILER_TRANSLATOR_UTIL_H_
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