/*

File: PVRTexture.h
Abstract: The PVRTexture class is responsible for loading .pvr files.

Version: 1.0

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*/

#import <Foundation/Foundation.h>

#import "Platforms/CCGL.h"
#import "CCTexture2D.h"


#pragma mark -
#pragma mark CCTexturePVR

struct CCPVRMipmap {
	unsigned char *address;
	unsigned int len;
};

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).
 */
@interface CCTexturePVR : NSObject
{
	struct CCPVRMipmap	mipmaps_[CC_PVRMIPMAP_MAX];	// pointer to mipmap images
	int		numberOfMipmaps_;					// number of mipmap used
	
	unsigned int	tableFormatIndex_;
	uint32_t width_, height_;
	GLuint	name_;
	BOOL hasAlpha_;
	
	// cocos2d integration
	BOOL retainName_;
	CCTexture2DPixelFormat format_;
}

/** initializes a CCTexturePVR with a path */
- (id)initWithContentsOfFile:(NSString *)path;
/** initializes a CCTexturePVR with an URL */
- (id)initWithContentsOfURL:(NSURL *)url;
/** creates and initializes a CCTexturePVR with a path */
+ (id)pvrTextureWithContentsOfFile:(NSString *)path;
/** creates and initializes a CCTexturePVR with an URL */
+ (id)pvrTextureWithContentsOfURL:(NSURL *)url;

/** texture id name */
@property (nonatomic,readonly) GLuint name;
/** texture width */
@property (nonatomic,readonly) uint32_t width;
/** texture height */
@property (nonatomic,readonly) uint32_t height;
/** whether or not the texture has alpha */
@property (nonatomic,readonly) BOOL hasAlpha;

// cocos2d integration
@property (nonatomic,readwrite) BOOL retainName;
@property (nonatomic,readonly) CCTexture2DPixelFormat format;

@end