StackOverflow2013

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12911400
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2012-10-16T09:20:19.950
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2012-10-16T09:20:19.950
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text
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@Julius: Your code is way too complicated and contains several bugs. I will make a correction for only the first lines: <pre><code>- (NSBitmapImageRep *)bitmapImageRepresentation { NSArray *ret =[self representations]; for( NSImageRep *rep in [self representations] ) if( [rep isKindOfClass:[NSBitmapImageRep class]] ) return rep; return nil; } </code></pre> This will extract the first <code>NSBitmapImageRep</code> if it is member in the representations or will return nil, if there is no <code>NSBitmapImageRep</code>. I'll give you another solution which will always work whatever <code>NSImageReps</code> are in the representations: <code>NSBitmapImageRep</code>, <code>NSPDFImageRep</code> or <code>NSCGImageSnapshotRep</code> or ... <pre><code>- (NSBitmapImageRep *)bitmapImageRepresentation { CGImageRef CGImage = [self CGImageForProposedRect:nil context:nil hints:nil]; return [[[NSBitmapImageRep alloc] initWithCGImage:CGImage] autorelease]; } </code></pre> Or to avoid subclassing of NSImage you may write: <pre><code>NSImage *img = [[[NSImage alloc] initWithContentsOfFile:filename] autorelease]; CGImageRef CGImage = [img CGImageForProposedRect:nil context:nil hints:nil]; NSBitmapImageRep *rep = [[[NSBitmapImageRep alloc] initWithCGImage:CGImage] autorelease]; </code></pre> This will only return a single <code>NSBitmapImageRep</code> which maybe not good enough if the image contains more than one representation (e.g. a lot of <code>NSBitmapImageRep</code>s from TIFF files). But adding some code is straightforward.
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1. PONSImage to NSBitmapImageRep
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1. USHeinrich Giesen
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1. COAs an additional suggestion, you might want to replace the second `[self representations]` with `ret` in the iteration, because right now `ret` is unused.
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 USBrad Larson
2. CO@Brad, good suggestion! Thanks.
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