Hello all,
I've been attempting to make sense of Apple's "LightTable" sample code for Core
Animation, and I'm completely lost. Specifically, a couple of calls appear to
be assigning an NSImage to the contents of a CALayer, which, as I previously
understood, (and according to the documentation) should be impossible.
Specifically, the "LTView" class contains the following, in its
-insertSlides:atIndexes: method:
NSImage *image = [[NSImage alloc] initWithData:[slide
valueForKey:kLTViewSlidePropertyPhoto]];
(snip)
LTMaskLayer *slideLayer = [LTMaskLayer layer];
slideLayer.photo = image;
Jumping over to the "LTMaskLayer" class, (keeping in mind that _visiblePhoto is
a plain-vanilla CALayer ivar) we have:
- (void)setPhoto:(id)newContents
{
_visiblePhoto.contents = newContents;
}
Am I crazy? Aren't these calls assigning an NSImage to a CALayer's contents?
For reference, documentation for CALayer -setContents: reads:
A layer can set this property to a CGImageRef to display the image as its
contents.
Can anyone explain what this code is doing?
Thanks in advance,
- Alex_______________________________________________
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