axmol/cocos2dx/textures/CCTexturePVR.h

/****************************************************************************
Copyright (c) 2011 Jirka Fajfr for cocos2d-x
Copyright (c) 2010 cocos2d-x.org

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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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
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#ifndef __CCPVRTEXTURE_H__
#define __CCPVRTEXTURE_H__

#include "CCStdC.h"
#include "CCGL.h"
#include "CCObject.h"
#include "CCArray.h"

NS_CC_BEGIN

/**
 @brief Structure which can tell where mimap begins and how long is it
*/
struct CCPVRMipmap {
    unsigned char *address;
    unsigned int len;
};

/**
 @brief Detemine how many mipmaps can we have. 
 Its same as define but it respects namespaces
*/
enum {
    CC_PVRMIPMAP_MAX = 16,
};


/** CCTexturePVR
     
 Object that loads PVR images.

 Supported PVR formats:
    - RGBA8888
    - BGRA8888
    - RGBA4444
    - RGBA5551
    - RGB565
    - A8
    - I8
    - AI88
    - PVRTC 4BPP
    - PVRTC 2BPP
     
 Limitations:
    Pre-generated mipmaps, such as PVR textures with mipmap levels embedded in file,
    are only supported if all individual sprites are of _square_ size. 
    To use mipmaps with non-square textures, instead call CCTexture2D#generateMipmap on the sheet texture itself
    (and to save space, save the PVR sprite sheet without mip maps included).
*/
class CCTexturePVR : public CCObject
{
public:
    CCTexturePVR();
    virtual ~CCTexturePVR();

    /** initializes a CCTexturePVR with a path */
    bool initWithContentsOfFile(const char* path);

    /** creates and initializes a CCTexturePVR with a path */
    static CCTexturePVR* pvrTextureWithContentsOfFile(const char* path);
    
    // properties 
    
    inline unsigned int getName() { return m_uName; }
    inline unsigned int getWidth() { return m_uWidth; }
    inline unsigned int getHeight() { return m_uHeight; }
    inline bool hasAlpha() { return m_bHasAlpha; }
    inline unsigned int getNumberOfMipmaps() { return m_uNumberOfMipmaps; }
    inline CCTexture2DPixelFormat getFormat() { return m_eFormat; }
    inline bool isRetainName() { return m_bRetainName; }
    inline void setRetainName(bool retainName) { m_bRetainName = retainName; }

private:
    bool unpackPVRData(unsigned char* data, unsigned int len);
    bool createGLTexture();
    
protected:
    struct CCPVRMipmap m_asMipmaps[CC_PVRMIPMAP_MAX];   // pointer to mipmap images    
    unsigned int m_uNumberOfMipmaps;                    // number of mipmap used
    
    unsigned int m_uTableFormatIndex;
    unsigned int m_uWidth, m_uHeight;
    GLuint m_uName;
    bool m_bHasAlpha;
    
    // cocos2d integration
    bool m_bRetainName;
    CCTexture2DPixelFormat m_eFormat;
};

NS_CC_END


#endif //__CCPVRTEXTURE_H__