Hi Seth. You might want to try putting an autorelease pool around your method. See the "Tip" in this document:
https://developer.apple.com/library/mac/#documentation/GraphicsImaging/Conceptual/CoreImaging/ci_tasks/ci_tasks.html%23//apple_ref/doc/uid/TP30001185-CH203-TPXREF101 I've used this tip before to fix what appeared to be a memory leak in my app. -Jeff On Jan 16, 2011, at 3:03 AM, Seth Willits wrote: > I have a CALayer subclass and I'm drawing into it using Core Image. I'm > taking a CGImage, blurring, and adding a darkened radial gradient on top of > it. Pretty simple. Now the weird thing is, using Core Image for drawing this > image (instead of just drawing with no effects using CGContextDrawImage) > increases my app's memory usage by 30 MB. That almost doubles the entire > usage of my app. > > It's not like I'm leaking any memory here, so why the large permanent > increase? I'd like to avoid it if I can because I'm getting criticized for > "using too much memory" despite it not being my fault. :-p > > > > - (void)drawInContext:(CGContextRef)theContext > { > CIImage * image = [CIImage > imageWithCGImage:(CGImageRef)self.backgroundImage]; > CGRect imageRect = [image extent]; > > CIFilter * blur = [CIFilter filterWithName:@"CIGaussianBlur"]; > [blur setValue:image forKey:@"inputImage"]; > [blur setValue:[NSNumber numberWithInt:2] > forKey:@"inputRadius"]; > > CIFilter * gradient = [CIFilter > filterWithName:@"CIRadialGradient"]; > CGPoint center = CGPointMake(CGRectGetMidX(imageRect), > CGRectGetMidY(imageRect)); > [gradient setValue:[CIVector vectorWithX:center.x Y:center.y] > forKey:@"inputCenter"]; > [gradient setValue:[NSNumber numberWithInt:0.0] > forKey:@"inputRadius0"]; > [gradient setValue:[NSNumber numberWithInt:600.0] > forKey:@"inputRadius1"]; > [gradient setValue:[CIColor colorWithRed:0.0 green:0.0 blue:0.0 > alpha:0.3] forKey:@"inputColor0"]; > [gradient setValue:[CIColor colorWithRed:0.0 green:0.0 blue:0.0 > alpha:0.6] forKey:@"inputColor1"]; > > CIContext * context = [CIContext > contextWithCGContext:theContext options:NULL]; > CGRect extent = [image extent]; > [context drawImage:[blur valueForKey:@"outputImage"] > inRect:self.bounds fromRect:extent]; > [context drawImage:[gradient valueForKey:@"outputImage"] > inRect:self.bounds fromRect:extent]; > } > > > > -- > Seth Willits _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
