Soft Light Rendering Example

gistfile1.m

CGImageRef imageRef = CGImageCreateWithImageInRect([rootViewController.gradientImage CGImage], CGRectMake(point.x, self.minY + self.superview.frame.origin.y, size.width, self.maxY - self.minY));
UIImage *img = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);

UIGraphicsBeginImageContext(self.backgroundImage.frame.size);
[img drawAtPoint:CGPointZero blendMode:kCGBlendModeSoftLight alpha:1];
[aImage drawAtPoint:CGPointZero blendMode:kCGBlendModeSoftLight alpha:alpha];

UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

self.backgroundImage.image = image;