On Fri, 06 Apr 2018 08:40:03 +0200 (CEST), Werner LEMBERG wrote: > Of course there will be stair-stepping! Just have a look into the > additional documentation files that accompany the old TrueType > specification (both Apple and MS versions). You'll see rectangles > everywhere talking about B/W rasterization.
I know, I used Macs in those days. Most of them still had only one-bit-per-pixel screens, and people didn’t really know any better. > A graphics system might apply filters to display such bitmaps on > screens, but this is not covered by the TT specification. If you are going to be filtering out frequencies above the Nyquist limit (antialiasing), then a rectangular shape is the wrong thing to start from, since you have already thrown away even harmonics below the limit. You start from a dimensionless point, i.e. an “ideally-sampled” pixel. _______________________________________________ Freetype mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/freetype
