In my UIView's drawRect: I derive a CGLayer from the current context, draw into it, and then draw the layer into the context (the view). This still works on iPhone with a Retina display, but the drawing is blocky. You can see the problem perfectly with Apple's own example code (DrawFlag) in the CGLayer Drawing page of the Quartz 2D Programming Guide - the stars in the flag are blocky.
I can work around the problem for a double-resolution screen by creating a CGLayer twice the size I need, applying a doubling scale transform, drawing as before into the CGLayer, and then drawing the CGLayer into my view's context scaled back down again. But I feel I shouldn't have to do this. Given that the documentation claims that "a CGLayer has all the characteristics of the graphics context [from which it is derived] - its resolution, colorspace, and graphics state settings," might we call this a bug? m. -- matt neuburg, phd = m...@tidbits.com, http://www.tidbits.com/matt/ pantes anthropoi tou eidenai oregontai phusei Among the 2007 MacTech Top 25, http://tinyurl.com/2rh4pf AppleScript: the Definitive Guide, 2nd edition http://www.tidbits.com/matt/default.html#applescriptthings Take Control of Exploring & Customizing Snow Leopard http://tinyurl.com/kufyy8 RubyFrontier! http://www.apeth.com/RubyFrontierDocs/default.html TidBITS, Mac news and reviews since 1990, http://www.tidbits.com _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
