cocos2d - Category on CCTextureCache to allow specification of image scale when adding a texture

CCTextureCache+AddTexture.h

//
//  CCTextureCache+AddTexture.h
//
//
//  Created by Richard Groves on 12/06/2014.
//
//	Extension for Cocos2d to support creating textures from images that are already loaded and have a contentScale != 1.0

#import "CCTextureCache.h"

@interface CCTextureCache (AddTexture)

/**
 * Returns a Texture2D object given an CGImageRef image.
 *
 * If the image was not previously loaded, it will create a new CCTexture2D object and it will return it.
 * Otherwise it will return a reference of a previously loaded image.
 * The "key" parameter will be used as the "key" for the cache.
 * If "key" is nil, then a new texture will be created each time.
 *
 *  @param image		CG image to create texture from.
 *  @param contentScale Content scale.
 *  @param key			Key used to define texture in cache.
 *
 *  @return Texture.
 */
-(CCTexture*) addCGImage: (CGImageRef) image contentScale: (CGFloat)contentScale forKey: (NSString *)key;

@end

CCTextureCache+AddTexture.m

//
//  CCTextureCache+AddTexture.m
//
//
//  Created by Richard Groves on 12/06/2014.
//
//	Extension for Cocos2d to support creating textures from images that are already loaded and have a contentScale != 1.0

#import "CCTextureCache+AddTexture.h"

#import "CCTexture_Private.h"

@implementation CCTextureCache (AddTexture)

-(CCTexture*) addCGImage: (CGImageRef) imageref contentScale: (CGFloat)contentScale forKey: (NSString *)key
{
	NSAssert(imageref != nil, @"TextureCache: image MUST not be nill");
	
	__block CCTexture * tex = nil;
	
	// If key is nil, then create a new texture each time
	if( key ) {
		dispatch_sync(_dictQueue, ^{
			tex = [_textures objectForKey:key];
		});
		if(tex)
			return((id)tex.proxy);
	}
	
	tex = [[CCTexture alloc] initWithCGImage:imageref contentScale:contentScale];
	
	if(tex && key){
		dispatch_sync(_dictQueue, ^{
			[_textures setObject: tex forKey:key];
		});
	}else{
		CCLOG(@"cocos2d: Couldn't add CGImage in CCTextureCache");
	}
	
	return((id)tex.proxy);
}

@end