Sorry for touching this old thread. I just want to be sure. If I am using Core Text (CTLineDraw(line, bitmapDrawContext);) to draw my text into bitmap context, there is no way to get sub-pixels antialiasing if resulting image has transparent background? Currently it looks: http://db.tt/Rtiu7B1
Regards, Rimas M. On Sun, Jun 27, 2010 at 11:47 PM, Ken Ferry <kenfe...@gmail.com> wrote: > I don't think this is likely to be the problem in this case. Text looks > good no matter where you draw it. > > In this case, I think the problem is more likely either > (1) A lack of what Quartz calls font smoothing, more popularly known > as subpixel > rendering <http://en.wikipedia.org/wiki/Subpixel_rendering>. > (2) The resulting image being drawn non-pixel aligned, incurring double > anti-aliasing effects. > > We would be able to tell from a screenshot. > > I would guess (1) is more likely. Dave, if you were to read that wikipedia > article and think about it carefully, you would realize that doing full > featured transparency with font smoothing would require six channels (red, > red alpha, green, green alpha, blue, blue alpha) instead of the usual ARGB > backing stores bitmaps use. The easiest fix when applicable is to make sure > the image isn't transparent. Fill the NSImage with an opaque color before > doing the text drawing. > _______________________________________________ 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
