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Sparrow+SI.h

//
//  Sparrow+SI.h
//

#import <UIKit/UIKit.h>

@interface SPUtils (DeviceAdditions)
+ (BOOL)isDevicePad;
+ (BOOL)isDeviceRetina;
@end

@implementation SPUtils (DeviceAdditions)
+ (BOOL)isDevicePad
{
	static int result = -1;
	if (result == -1)
	{
		result = ([[UIDevice currentDevice] respondsToSelector:@selector(userInterfaceIdiom)] && [[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad);
	}
	return (BOOL)result;
}

+ (BOOL)isDeviceRetina
{
	static int result = -1;
	if (result == -1)
	{
		result = ([[UIScreen mainScreen] respondsToSelector:@selector(scale)] && [[UIScreen mainScreen] scale] == 2.0);
	}
	return (BOOL)result;
}
@end

@interface SPDisplayObject (Centering)
@property (nonatomic, assign) SPPoint *center;
@end

@implementation SPDisplayObject (Centering)
- (SPPoint *)center
{
	return [SPPoint	pointWithX:self.x+self.width/2 y:self.y+self.height/2];
}
- (void)setCenter:(SPPoint *)center
{
	self.x = center.x-self.width/2;
	self.y = center.y-self.height/2;
}
@end

@implementation SPGLTexture (NearestNeighbor)
- (void)setFilter:(SPTextureFilter)filterType
{
	mFilter = SPTextureFilterNearestNeighbor;
	glBindTexture(GL_TEXTURE_2D, mTextureID); 
	
	int magFilter = GL_NEAREST;
	int minFilter = mMipmaps ? GL_NEAREST_MIPMAP_NEAREST : GL_NEAREST;
	
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilter); 
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilter);
}
@end