#ifndef _GLUCONTEXTINFO_HPP
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#define _GLUCONTEXTINFO_HPP
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/*-------------------------------------------------------------------------
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* drawElements Quality Program OpenGL ES Utilities
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* ------------------------------------------------
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*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*//*!
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* \file
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* \brief Context Info Class.
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*//*--------------------------------------------------------------------*/
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#include "gluDefs.hpp"
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#include <vector>
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#include <string>
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#include <set>
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namespace glu
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{
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class RenderContext;
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template <typename T, class ComputeValue>
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class CachedValue
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{
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public:
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CachedValue (ComputeValue compute = ComputeValue(), const T& defaultValue = T())
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: m_compute (compute)
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, m_value (defaultValue)
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, m_isComputed (false)
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{
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}
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const T& getValue (const RenderContext& context) const
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{
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if (!m_isComputed)
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{
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m_value = m_compute(context);
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m_isComputed = true;
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}
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return m_value;
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}
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private:
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ComputeValue m_compute;
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mutable T m_value;
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mutable bool m_isComputed;
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};
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class GetCompressedTextureFormats
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{
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public:
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std::set<int> operator() (const RenderContext& context) const;
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};
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typedef CachedValue<std::set<int>, GetCompressedTextureFormats> CompressedTextureFormats;
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/*--------------------------------------------------------------------*//*!
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* \brief Context information & limit query.
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*//*--------------------------------------------------------------------*/
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class ContextInfo
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{
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public:
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virtual ~ContextInfo (void);
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virtual int getInt (int param) const;
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virtual bool getBool (int param) const;
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virtual const char* getString (int param) const;
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virtual bool isVertexUniformLoopSupported (void) const { return true; }
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virtual bool isVertexDynamicLoopSupported (void) const { return true; }
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virtual bool isFragmentHighPrecisionSupported (void) const { return true; }
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virtual bool isFragmentUniformLoopSupported (void) const { return true; }
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virtual bool isFragmentDynamicLoopSupported (void) const { return true; }
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virtual bool isCompressedTextureFormatSupported (int format) const;
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const std::vector<std::string>& getExtensions (void) const { return m_extensions; }
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bool isExtensionSupported (const char* extName) const;
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static ContextInfo* create (const RenderContext& context);
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protected:
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ContextInfo (const RenderContext& context);
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const RenderContext& m_context;
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private:
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ContextInfo (const ContextInfo& other);
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ContextInfo& operator= (const ContextInfo& other);
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std::vector<std::string> m_extensions;
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CompressedTextureFormats m_compressedTextureFormats;
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};
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} // glu
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#endif // _GLUCONTEXTINFO_HPP
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