Re: NSImage TIFFRepresentation crashes
Re: NSImage TIFFRepresentation crashes
- Subject: Re: NSImage TIFFRepresentation crashes
- From: Markus Spoettl <email@hidden>
- Date: Sun, 10 Mar 2013 14:04:25 +0100
On 3/10/13 1:09 PM, Mike Abdullah wrote:
NSData *tiff = [image TIFFRepresentation];
NSBitmapImageRep *bmprep = [NSBitmapImageRep imageRepWithData:tiff];
NSDictionary *props = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:NO], NSImageInterlaced, nil];
NSData *pngData = [bmprep representationUsingType:NSPNGFileType properties:props];
This is a massively wasteful approach. Likely the best compromise for your
needs is to grab a CGImage from the NSImage, and then generate the PNG from
that (either using NSBitmapImageRep or CGImageDestination). This takes care
of only creating a fresh CGImage instance if actually needed.
OK, I'll look into that, thanks. Since performance is not really a concern and
if the implementation doesn't have any other weak spots that could cause
legitimate trouble, it's a bit academic, though.
The point of the original question was to find out if -TIFFRepresentation is
"allowed" to crash on special images and if there was a way to predict such a
crash or avoid it.
Avoiding -TIFFRepresentation altogether would be a solution I guess.
Thanks all for the input on this!
Regards
Markus
--
__________________________________________
Markus Spoettl
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