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//
// Copyright (c) 2013-2014 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.
//
// ShaderVars.h:
// Types to represent GL variables (varyings, uniforms, etc)
//
#ifndef _COMPILER_INTERFACE_VARIABLES_
#define _COMPILER_INTERFACE_VARIABLES_
#include <string>
#include <vector>
#include <algorithm>
// Assume ShaderLang.h is included before ShaderVars.h, for sh::GLenum
namespace sh
{
// Varying interpolation qualifier, see section 4.3.9 of the ESSL 3.00.4 spec
enum InterpolationType
{
INTERPOLATION_SMOOTH,
INTERPOLATION_CENTROID,
INTERPOLATION_FLAT
};
// Uniform block layout qualifier, see section 4.3.8.3 of the ESSL 3.00.4 spec
enum BlockLayoutType
{
BLOCKLAYOUT_STANDARD,
BLOCKLAYOUT_PACKED,
BLOCKLAYOUT_SHARED
};
// Base class for all variables defined in shaders, including Varyings, Uniforms, etc
// Note: we must override the copy constructor and assignment operator so we can
// work around excessive GCC binary bloating:
// See https://code.google.com/p/angleproject/issues/detail?id=697
struct ShaderVariable
{
ShaderVariable();
ShaderVariable(GLenum typeIn, unsigned int arraySizeIn);
~ShaderVariable();
ShaderVariable(const ShaderVariable &other);
ShaderVariable &operator=(const ShaderVariable &other);
bool isArray() const { return arraySize > 0; }
unsigned int elementCount() const { return std::max(1u, arraySize); }
GLenum type;
GLenum precision;
std::string name;
std::string mappedName;
unsigned int arraySize;
bool staticUse;
};
struct Uniform : public ShaderVariable
{
Uniform();
~Uniform();
Uniform(const Uniform &other);
Uniform &operator=(const Uniform &other);
bool isStruct() const { return !fields.empty(); }
std::vector<Uniform> fields;
};
struct Attribute : public ShaderVariable
{
Attribute();
~Attribute();
Attribute(const Attribute &other);
Attribute &operator=(const Attribute &other);
int location;
};
struct InterfaceBlockField : public ShaderVariable
{
InterfaceBlockField();
~InterfaceBlockField();
InterfaceBlockField(const InterfaceBlockField &other);
InterfaceBlockField &operator=(const InterfaceBlockField &other);
bool isStruct() const { return !fields.empty(); }
bool isRowMajorMatrix;
std::vector<InterfaceBlockField> fields;
};
struct Varying : public ShaderVariable
{
Varying();
~Varying();
Varying(const Varying &other);
Varying &operator=(const Varying &other);
bool isStruct() const { return !fields.empty(); }
InterpolationType interpolation;
std::vector<Varying> fields;
std::string structName;
};
struct InterfaceBlock
{
InterfaceBlock();
~InterfaceBlock();
InterfaceBlock(const InterfaceBlock &other);
InterfaceBlock &operator=(const InterfaceBlock &other);
std::string name;
std::string mappedName;
unsigned int arraySize;
BlockLayoutType layout;
bool isRowMajorLayout;
bool staticUse;
std::vector<InterfaceBlockField> fields;
};
}
#endif // _COMPILER_INTERFACE_VARIABLES_
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