Andreas: On Mar 27, 2012, at 6:41 PM, Andreas Mayer wrote:
> The scale value is the same as set in > UIGraphicsBeginImageContextWithOptions(), as far as I can tell. Right, that was what I meant actually. > But it will be lost when creating PNG data and reading it again. (Since I > don't see a way of creating a PNG file without using > UIImagePNGRepresentation() it doesn't seem to matter if the data was saved to > a file or not.) You have a point here ;) > So either imageWithData does not restore the scale from PNG data or > UIImagePNGRepresentation() does not store it in the first place. > > I see that as a bug, since the PNG format is able to hold that information. Yes, I think it is imageWithData that is the culprit. In this WWDC session, they actually state that they specifically did this because some older applications would get in trouble. I don't remember how they worded it, it was addressed very briefly. I will watch that part again. Edit: I just checked and they say they do this for compatibility reasons. It's around the 9'40'' mark, session 134 - Optimize your iPhone App for the Retina Display (WWDC 2010, I assume you have access)... _______________________________________________ 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
