axmol/cocos2dx/CCConfiguration.h

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2010      Ricardo Quesada

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
in the Software without restriction, including without limitation the rights
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furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#ifndef __CCCONFIGURATION_H__
#define __CCCONFIGURATION_H__

#include "cocoa/CCObject.h"
#include "CCGL.h"
#include "cocoa/CCString.h"
#include <string>



NS_CC_BEGIN

typedef enum _ccConfigurationType {
    ConfigurationError,
    ConfigurationString,
    ConfigurationInt,
    ConfigurationDouble,
    ConfigurationBoolean
} ccConfigurationType;


/**
 * @addtogroup global
 * @{
 */
/**
 @brief CCConfiguration contains some openGL variables
 @since v0.99.0
 */
class CC_DLL CCConfiguration : public CCObject
{
public:
    /** returns a shared instance of CCConfiguration */
    static CCConfiguration *sharedConfiguration(void);
    /** purge the shared instance of CCConfiguration */
    static void purgeConfiguration(void);
public:    

	virtual ~CCConfiguration(void);

    /** OpenGL Max texture size. */
	int getMaxTextureSize(void) const;

    /** OpenGL Max Modelview Stack Depth. */
	int getMaxModelviewStackDepth(void) const;

    /** returns the maximum texture units
     @since v2.0.0
     */
	int getMaxTextureUnits(void) const;

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

    /** Whether or not PVR Texture Compressed is supported */
	bool supportsPVRTC(void) const;

    /** Whether or not BGRA8888 textures are supported.
     @since v0.99.2
     */
	bool supportsBGRA8888(void) const;

    /** Whether or not glDiscardFramebufferEXT is supported
     @since v0.99.2
     */
	bool supportsDiscardFramebuffer(void) const;

    /** Whether or not shareable VAOs are supported.
     @since v2.0.0
     */
	bool supportsShareableVAO(void) const;

    /** returns whether or not an OpenGL is supported */
    bool checkForGLExtension(const std::string &searchName) const;

    bool init(void);

	/** returns the value of a given key as a string */
	const char* getCString( const char *key ) const;

	/** returns the value of a given key as a boolean */
	bool getBool( const char *key ) const;

	/** returns the value of a given key as a double */
	double getNumber( const char *key ) const;

	/** returns the value of a given key as a double */
	CCObject * getObject( const char *key ) const;

	/** returns the type of a given key */
	ccConfigurationType getType( const char *key ) const;

	/** dumps the current configuration on the console */
	void dumpInfo(void) const;

	/** loads JSON config file in the configuration */
	void loadConfigFile( char *filename );

	/** gathers OpenGL / GPU information */
	void gatherGPUInfo( void );

private:
    CCConfiguration(void);
    static CCConfiguration *s_gSharedConfiguration;
    
protected:
    GLint           m_nMaxTextureSize;
    GLint           m_nMaxModelviewStackDepth;
    bool            m_bSupportsPVRTC;
    bool            m_bSupportsNPOT;
    bool            m_bSupportsBGRA8888;
    bool            m_bSupportsDiscardFramebuffer;
    bool            m_bSupportsShareableVAO;
    GLint           m_nMaxSamplesAllowed;
    GLint           m_nMaxTextureUnits;
    char *          m_pGlExtensions;
	CCDictionary	*m_pDefaults;
};

// end of global group
/// @}

NS_CC_END

#endif // __CCCONFIGURATION_H__