UIImage_resize_fit_to_screen.cpp

- (UIImage *)resize:(UIImage *)src
{
	UIImage *newImage;
	
	CGFloat width = 0.0;
	CGFloat height = 0.0;
	
	if (src.size.width > SCREEN_BOUNDS.size.width)
	{
		width  = SCREEN_BOUNDS.size.width;
		height = src.size.height * (SCREEN_BOUNDS.size.width / src.size.width);
	}
	
	if (height > SCREEN_BOUNDS.size.height)
	{
		width  = width * (SCREEN_BOUNDS.size.height / height);
		height = SCREEN_BOUNDS.size.height;
	}
	
	CGSize previewSize = CGSizeMake(width, height);
	
	UIGraphicsBeginImageContext(previewSize);
	{
		[src drawInRect:CGRectMake(0, 0, previewSize.width, previewSize.height)];
		newImage = UIGraphicsGetImageFromCurrentImageContext();
	}
	UIGraphicsEndImageContext();
	
	return newImage;
}