On Oct 31, 2011, at 6:44 PM, Arbit Richardi wrote: > I'm looking for tips to speed image drawing on OS X — this is a > primary function of my application. I started out naively with > NSImage, switched to CGImage, tried layer backing, and now draw > directly into a hosted layer with Quartz. I have an implementation > using CATiledLayers but it doesn't add speed in common cases. > > At this point, large images still draw significantly slower than in > Preview. For example, I can display a 25MB test JPEG (~9k x 9k pixels) > in ~2 seconds while Preview can display it in ~1 second on the same > machine.
Well, your multiple approaches make me wonder what you mean by "draw" but take a look at the graphics context's interpolation quality for scaling. It makes a huge difference. -- Seth Willits _______________________________________________ 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
