> On May 27, 2020, at 3:03 PM, Steve Mills via Cocoa-dev > <cocoa-dev@lists.apple.com> wrote: > >> I can't recall/reproduce, but it was definitely *inside* >> CGImageSourceCreateThumbnailAtIndex(). >> >> If there is no image a tinder 0, shouldn't it just return NULL gracefully? > > We don’t know that. There are many routines that throw exceptions when the > index is out of bounds. You should be calling CGImageSourceGetCount first to > make sure there’s an image at 0.
Right. If you look at the docs <https://developer.apple.com/documentation/imageio/1465099-cgimagesourcecreatethumbnailatin>, it says that the result is “A CGImage object. …”. It doesn’t say “A CGImage object or NULL. …”. That suggests that you need to provide a valid index. _______________________________________________ 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
