I've been wrestling with this all day and nothing is working. This code: NSImage* nsImage = [[NSImage alloc] initWithCGImage:cgImage size:NSZeroSize]; NSBitmapImageRep* biRep = [[NSBitmapImageRep alloc] initWithCGImage:cgImage]; NSData* nsImageData = [biRep TIFFRepresentationUsingCompression:NSTIFFCompressionPackBits factor:0];
Produces this error on the call to TIFFRepresentationUsingCompression: CGImageDestinationFinalize failed for output type 'public.tiff' I've also tried NSTIFFCompressionNone and NSTIFFCompressionLZW for the compression type. Hmm, after working some more, I was able to get it to work be forcing the image rep to copy the pixels rather than simply glomming onto the CGImageRef: NSImage* nsImage = [[NSImage alloc] initWithCGImage:cgImage size:NSMakeSize(CGImageGetWidth(cgImage), CGImageGetHeight(cgImage))]; NSBitmapImageRep* bitmapImageRep; [nsImage lockFocus]; bitmapImageRep = [[NSBitmapImageRep alloc] initWithFocusedViewRect:NSMakeRect(0, 0, nsImage.size.width, nsImage.size.height)]; [nsImage unlockFocus]; This gives me an image rep I can pass to CGImageDestinationAddImage to actually get the tiff data into the file. But I'm still curious why I can't get a CGImageRef, create an NSImage from it, and create a tiff from that. -- Steve Mills office: 952-818-3871 home: 952-401-6255 _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
