NSViewからNSVIewへのトランジションをCoreImageで/ ３

追記(2008/10/06): サンプルプロジェクトを作った．エントリーと異なる部分もあるが許してください．

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でTransitionクラス．NSViewの画像キャプチャー部

    …
@class CIImage;
    …
@interface Transition : NSObject {
    … 
    CIImage *_finalImage;
    CIImage *_initialImage;
    …
}
@end
@implementation Transition
    …
- (void)captureViewForInitialView:(NSView*)view {
    CIImage * image = [self createCoreImage:view];
    [_initialImage release];
    _initialImage = [image retain];
}
- (void)captureViewForFinalView:(NSView*)view {
    CIImage * image = [self createCoreImage:view];
    [_finalImage release];
    _finalImage = [image retain];
}
- (CIImage *)createCoreImage:(NSView *)view {
    NSBitmapImageRep *bitmap= [view bitmapImageRepForCachingDisplayInRect:[view bounds]];
    [view cacheDisplayInRect:[view bounds] toBitmapImageRep:bitmap]; //important
    CIImage *img= [[CIImage alloc] initWithBitmapImageRep:bitmap];
    return img;
}
   …
@end