#ifndef _RSGEXECUTIONCONTEXT_HPP
#define _RSGEXECUTIONCONTEXT_HPP
/*-------------------------------------------------------------------------
 * drawElements Quality Program Random Shader Generator
 * ----------------------------------------------------
 *
 * Copyright 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *//*!
 * \file
 * \brief Shader Execution Context.
 *//*--------------------------------------------------------------------*/

#include "rsgDefs.hpp"
#include "rsgVariable.hpp"
#include "rsgVariableValue.hpp"
#include "rsgSamplers.hpp"

#include <vector>
#include <map>

namespace rsg
{

constexpr int EXEC_VEC_WIDTH = 64;

typedef ConstStridedValueAccess<EXEC_VEC_WIDTH>			ExecConstValueAccess;
typedef StridedValueAccess<EXEC_VEC_WIDTH>				ExecValueAccess;
typedef ValueStorage<EXEC_VEC_WIDTH>					ExecValueStorage;

typedef std::map<const Variable*, ExecValueStorage*>	VarValueMap;

class ExecMaskStorage
{
public:
							ExecMaskStorage	(bool initVal = true);

	ExecValueAccess			getValue		(void);
	ExecConstValueAccess	getValue		(void) const;

private:
	Scalar					m_data[EXEC_VEC_WIDTH];
};

class ExecutionContext
{
public:
									ExecutionContext		(const Sampler2DMap& samplers2D, const SamplerCubeMap& samplersCube);
									~ExecutionContext		(void);

	ExecValueAccess					getValue				(const Variable* variable);
	const Sampler2D&				getSampler2D			(const Variable* variable) const;
	const SamplerCube&				getSamplerCube			(const Variable* variable) const;

	ExecConstValueAccess			getExecutionMask		(void) const;

	void							andExecutionMask		(ExecConstValueAccess value); // Pushes computed value
	void							pushExecutionMask		(ExecConstValueAccess value);

	void							popExecutionMask		(void);

protected:
									ExecutionContext		(const ExecutionContext& other);
	ExecutionContext&				operator=				(const ExecutionContext& other);

	VarValueMap						m_varValues;
	const Sampler2DMap&				m_samplers2D;
	const SamplerCubeMap&			m_samplersCube;
	std::vector<ExecMaskStorage>	m_execMaskStack;
};

void assignMasked (ExecValueAccess dst, ExecConstValueAccess src, ExecConstValueAccess mask);

} // rsg

#endif // _RSGEXECUTIONCONTEXT_HPP