iPhone - is it IMPOSSIBLE to grab the contents of a CALayers composition?
- by Mike
I have a CALayer transformed in 3D on a offscreen UIView (much larger than 320x480).
How do I dump what is seen on this UIView to a UIImage?
NOTE: I Have edited the question to include this code...
This is how I create the layer...
CGRect area = CGRectMake (0,0,400,600];
vista3D = [[UIView alloc] initWithFrame:area ];
[self.view addSubview:vista3D];
[vista3D release];
transformed = [CALayer layer];
transformed.frame = area;
[vista3D.layer addSublayer:transformed];
CALayer *imageLayer = [CALayer layer];
imageLayer.doubleSided = YES;
imageLayer.frame = area;
imageLayer.transform = CATransform3DMakeRotation(40 * M_PI / 180.0f, 1.0f, 0.0f, 0.0f);
imageLayer.contents = (id)myRawImage.CGImage;
[transformed addSublayer:imageLayer];
// Add a perspective effect
CATransform3D initialTransform = transformed.sublayerTransform;
initialTransform.m34 = 1.0 / -500;
transformed.sublayerTransform = initialTransform;
// now the layer is in perspective
// my next step is to "flatten" the composition into a UIImage
UIImage *thisIsTheResult = some magic command
thanks for any help!
EDIT 1: I have tried jessecurry solution but it gives me a flat layer without any perspective.
EDIT 2: I discovered a partial solution for this that works, but this solution gives me an image the size of the screen and I was looking for obtaining a higher resolution version, rendering off screen.
