The launch of Adobe's 'Source Sans' type family has allowed me to run some 'like for like' tests of ttfautohint instructions against proffesional-level manual instructions. Source Sans seems very well instructed, so it's a great tool for testing ttfautohint.
One difference i notice (again) is that at small size ranges (eg. 8-12pts) the ttfautohinted font renders the x-height 1 pixel higher than the pro-level manually hinted font. I have posted screenshots & a brief explanation at http://goo.gl/hsxZr I would like to suggest that ttfautohint should be able to produce x-heights at the height same as the manually hinted font. I think this difference is due to ttfautohint/freetype snapping the x-height 'up' to the nearest pixel edge, whereas when manually hinting the designer as allowed the x-height to snap 'down' to the nearest pixel edge? At the moment ttfautohint can increase the x-height by using the -x argument, but switching this feature off (-x 0) still increases x-height compared to the original instructions. Would it be possible for ttfautohint to decrease the x-height snapping by 1px at particular size range? :) -vern _______________________________________________ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
