On 04/09/2012 09:23 PM, Alexei Podtelezhnikov wrote: > In memory of Paul Alexi > > As a way of ping, I going to throw in a much simpler > FT_Outline_Get_Orientation patch. So the whole collection of three > patches now looks like the attached. Comments, suggestions?
I like the area-based algorithm. I had to implement outline orientation code recently and I wish I had remembered that algorithm! What I found in testing my implementation was that fonts don't have consistent contour orientation. From what I understand: - TrueType fonts have even-odd fill rule and fill-right orientation, - Type1 fonts have zero-winding fill rule and fill-left orientation. Now *if* TrueType outlines are really fill-right, then even-odd and zero-winding rules are the same. But I've came across many fonts where TrueType outlines are even-odd, not fill-right. I'm guessing that you want to return ORIENTATION_NONE in those cases. But finding them is not easy with your algorithm. Maybe we don't care really. What I ended up doing was implement both even-odd rule and winding rule and compare the results. I was doing this on arc splines though, not Beziers. behdad _______________________________________________ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
