On 2011-05-08, at 12:47 AM, Fred Kiefer wrote: > > -------- Original-Nachricht -------- >> Datum: Sun, 08 May 2011 01:32:58 +0200 >> Von: Riccardo Mottola <riccardo.mott...@libero.it> >> An: Eric Wasylishen <ewasylis...@gmail.com> >> CC: Developer GNUstep <gnustep-dev@gnu.org> >> Betreff: Re: Image size, DPI (was Re: Gorm is broken) > >> Hi, >>> On a related note, I think the Cairo backend also rounds the coordinates >> of path points - shouldn't we get rid of that as well? >>> >> I think that perhaps we should. But it is a delicate issue. Try >> Graphos:play with it drawing boxes and lines especially, check our >> various backends and check cocoa. Try different line widths. My >> impression is that on cairo everything is always blurred :) Xlib of >> course never since it has no anti-aliasing. But Cocoa isn't as "bad" as >> cairo, it usually looks fine for integer line widths. > > If I remember correctly the code here tries to avoid bluring for lines that > the programmer would expect to be exactly horizontal or vertical oriented. > This is the standard approach used by all cairo applications I know of. We > should add a lot of tests before we change this.
Ok. I agreed it should be well tested if changed. Based on a quick check, however, cairo's and Cocoa's default behaviour are exactly the same , i.e. the examples here: http://www.cairographics.org/FAQ/#sharp_lines produce the same results on Cocoa, so it doesn't appear that cocoa does any rounding below the level of NSView implementations. _______________________________________________ Gnustep-dev mailing list Gnustep-dev@gnu.org https://lists.gnu.org/mailman/listinfo/gnustep-dev
