India/cocos2d-x/cocos/base/CCConfiguration.h

/****************************************************************************
Copyright (c) 2010      Ricardo Quesada
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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****************************************************************************/

#ifndef __CCCONFIGURATION_H__
#define __CCCONFIGURATION_H__

#include <string>

#include "base/CCRef.h"
#include "base/CCValue.h"
#include "platform/CCGL.h"
#include "3d/CCAnimate3D.h"

/**
 * @addtogroup base
 * @{
 */
NS_CC_BEGIN

class EventCustom;

/** @class Configuration
 * @brief Configuration contains some openGL variables
 * @since v0.99.0
 * @js NA
 */
class CC_DLL Configuration : public Ref
{
public:
    
    /** Returns a shared instance of Configuration.
     * 
     * @return An autoreleased Configuration object.
     */
    static Configuration *getInstance();

    /** Purge the shared instance of Configuration.
     */
    static void destroyInstance();

    /** @deprecated Use getInstance() instead */
    CC_DEPRECATED_ATTRIBUTE static Configuration *sharedConfiguration();

    /** @deprecated Use destroyInstance() instead */
    CC_DEPRECATED_ATTRIBUTE static void purgeConfiguration();

public:
    /** Destructor
     * @js NA
     * @lua NA
     */
	virtual ~Configuration();

    /** OpenGL Max texture size.
     * 
     * @return The OpenGL Max texture size.
     */
	int getMaxTextureSize() const;

    /** OpenGL Max Modelview Stack Depth.
     *
     * @return The OpenGL Max Modelview Stack Depth.
     */
	int getMaxModelviewStackDepth() const;

    /** Returns the maximum texture units.
     *
     * @return The maximum texture units.
     * @since v2.0.0
     */
	int getMaxTextureUnits() const;

    /** Whether or not the GPU supports NPOT (Non Power Of Two) textures.
     OpenGL ES 2.0 already supports NPOT (iOS).
     * 
     * @return Is true if supports NPOT.
     * @since v0.99.2
     */
	bool supportsNPOT() const;

    /** Whether or not PVR Texture Compressed is supported.
     *
     * @return Is true if supports PVR Texture Compressed.
     */
	bool supportsPVRTC() const;
    
    /** Whether or not ETC Texture Compressed is supported.
     * 
     *
     * @return Is true if supports ETC Texture Compressed.
     */
    bool supportsETC() const;
    
    /** Whether or not S3TC Texture Compressed is supported.
     *
     * @return Is true if supports S3TC Texture Compressed.
     */
    bool supportsS3TC() const;
    
    /** Whether or not ATITC Texture Compressed is supported.
     *
     * @return Is true if supports ATITC Texture Compressed.
     */
    bool supportsATITC() const;
    
    /** Whether or not BGRA8888 textures are supported.
     *
     * @return Is true if supports BGRA8888 textures.
     * @since v0.99.2
     */
	bool supportsBGRA8888() const;

    /** Whether or not glDiscardFramebufferEXT is supported.
     * @return Is true if supports glDiscardFramebufferEXT.
     * @since v0.99.2
     */
	bool supportsDiscardFramebuffer() const;

    /** Whether or not shareable VAOs are supported.
     *
     * @return Is true if supports shareable VAOs.
     * @since v2.0.0
     */
	bool supportsShareableVAO() const;

    /** Whether or not OES_depth24 is supported.
     *
     * @return Is true if supports OES_depth24.
     * @since v2.0.0
     */
    bool supportsOESDepth24() const;
    
    /** Whether or not OES_Packed_depth_stencil is supported.
     *
     * @return Is true if supports OES_Packed_depth_stencil.
     * @since v2.0.0
     */
    bool supportsOESPackedDepthStencil() const;

    /** Whether or not glMapBuffer() is supported.
     *
     * On Desktop it returns `true`.
     * On Mobile it checks for the extension `GL_OES_mapbuffer`
     *
     * @return Whether or not `glMapBuffer()` is supported.
     * @since v3.13
     */
    bool supportsMapBuffer() const;

    
    /** Max support directional light in shader, for Sprite3D.
     *
     * @return Maximum supports directional light in shader.
     * @since v3.3
     */
    int getMaxSupportDirLightInShader() const;
    
    /** Max support point light in shader, for Sprite3D.
     *
     * @return Maximum supports point light in shader.
     * @since v3.3
     */
    int getMaxSupportPointLightInShader() const;
    
    /** Max support spot light in shader, for Sprite3D.
     *
     * @return Maximum supports spot light in shader.
     * @since v3.3
     */
    int getMaxSupportSpotLightInShader() const;

    /** get 3d animate quality*/
    Animate3DQuality getAnimate3DQuality() const;
    
    /** Returns whether or not an OpenGL is supported. 
     *
     * @param searchName A given search name.
     * @return Is true if an OpenGL is supported.
     */
    bool checkForGLExtension(const std::string &searchName) const;

    /** Initialize method.
     *
     * @return Is true if initialize success.
     */
    bool init();

	/** Returns the value of a given key as a double.
     *
     * @param key A given key.
     * @param defaultValue if not find the value, return the defaultValue.
     * @return 
     */
	const Value& getValue(const std::string& key, const Value& defaultValue = Value::Null) const;

	/** Sets a new key/value pair  in the configuration dictionary.
     *
     * @param key A given key.
     * @param value A given value.
     */
	void setValue(const std::string& key, const Value& value);

    /** Returns the Configuration info.
     *
     * @return The Configuration info.
     */
    std::string getInfo() const;

	/** Gathers OpenGL / GPU information.
     */
	void gatherGPUInfo();

	/** Loads a config file. If the keys are already present, then they are going to be replaced. Otherwise the new keys are added.
     * 
     * @param filename Config file name.
     */
	void loadConfigFile(const std::string& filename);
    
    static const char* CONFIG_FILE_LOADED;

private:
    Configuration(void);
    static Configuration    *s_sharedConfiguration;
	static std::string		s_configfile;
    
protected:
    GLint           _maxTextureSize;
    GLint           _maxModelviewStackDepth;
    bool            _supportsPVRTC;
    bool            _supportsETC1;
    bool            _supportsS3TC;
    bool            _supportsATITC;
    bool            _supportsNPOT;
    bool            _supportsBGRA8888;
    bool            _supportsDiscardFramebuffer;
    bool            _supportsShareableVAO;
    bool            _supportsOESMapBuffer;
    bool            _supportsOESDepth24;
    bool            _supportsOESPackedDepthStencil;
    
    GLint           _maxSamplesAllowed;
    GLint           _maxTextureUnits;
    char *          _glExtensions;
    int             _maxDirLightInShader; //max support directional light in shader
    int             _maxPointLightInShader; // max support point light in shader
    int             _maxSpotLightInShader; // max support spot light in shader
    Animate3DQuality  _animate3DQuality; // animate 3d quality
	
	ValueMap        _valueDict;
    
    EventCustom*    _loadedEvent;
};


NS_CC_END
// end of base group
/// @}

#endif // __CCCONFIGURATION_H__