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jarek-foksa/gist:5035863

Created February 26, 2013 04:25
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gistfile1.txt
NSDictionary *dictionary = [NSDictionary dictionaryWithObjects:@[@"1.0"] forKeys:@[@"NSImageCompressionFactor"]];
NSBitmapImageRep *imageRep = [[NSBitmapImageRep alloc] initWithData:[img TIFFRepresentation]];
NSData *png = [imageRep representationUsingType:NSPNGFileType properties:dictionary];
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