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#ifndef _GLUCONTEXTINFO_HPP
#define _GLUCONTEXTINFO_HPP
/*-------------------------------------------------------------------------
* drawElements Quality Program OpenGL ES Utilities
* ------------------------------------------------
*
* 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 Context Info Class.
*//*--------------------------------------------------------------------*/
#include "glwFunctions.hpp"
#include "gluDefs.hpp"
#include <vector>
#include <string>
#include <set>
namespace glu
{
class RenderContext;
template <typename T, class ComputeValue>
class CachedValue
{
public:
CachedValue (ComputeValue compute = ComputeValue(), const T& defaultValue = T())
: m_compute (compute)
, m_value (defaultValue)
, m_isComputed (false)
{
}
const T& getValue (const RenderContext& context) const
{
if (!m_isComputed)
{
m_value = m_compute(context);
m_isComputed = true;
}
return m_value;
}
private:
ComputeValue m_compute;
mutable T m_value;
mutable bool m_isComputed;
};
class GetCompressedTextureFormats
{
public:
std::set<int> operator() (const RenderContext& context) const;
};
typedef CachedValue<std::set<int>, GetCompressedTextureFormats> CompressedTextureFormats;
bool IsES3Compatible(const glw::Functions& gl);
/*--------------------------------------------------------------------*//*!
* \brief Context information & limit query.
*//*--------------------------------------------------------------------*/
class ContextInfo
{
public:
virtual ~ContextInfo (void);
virtual int getInt (int param) const;
virtual bool getBool (int param) const;
virtual const char* getString (int param) const;
virtual bool isVertexUniformLoopSupported (void) const { return true; }
virtual bool isVertexDynamicLoopSupported (void) const { return true; }
virtual bool isFragmentHighPrecisionSupported (void) const { return true; }
virtual bool isFragmentUniformLoopSupported (void) const { return true; }
virtual bool isFragmentDynamicLoopSupported (void) const { return true; }
virtual bool isCompressedTextureFormatSupported (int format) const;
const std::vector<std::string>& getExtensions (void) const { return m_extensions; }
bool isExtensionSupported (const char* extName) const;
bool isES3Compatible() const;
static ContextInfo* create (const RenderContext& context);
protected:
ContextInfo (const RenderContext& context);
const RenderContext& m_context;
private:
ContextInfo (const ContextInfo& other);
ContextInfo& operator= (const ContextInfo& other);
std::vector<std::string> m_extensions;
CompressedTextureFormats m_compressedTextureFormats;
};
} // glu
#endif // _GLUCONTEXTINFO_HPP