Right now default scale is 0,0 when a new font is created. Should I change that to upem,upem? That sounds like a more useful default.
Specifically, this pattern is becoming more common: parent_font = hb_font_create (face); hb_ot_font_set_funcs (parent_font); font = hb_font_create_sub_font (parent_font); hb_font_set_funcs(font, custom_funcs...); hb_font_set_scale(font, ...); This way custom funcs can provide only a few (say, hinted h_advance) function and everything else comes from parent_font. For size-related things (like glyph_extents()) that do come from parent_font, they are scaled properly to match the scale of the new font, but that will only work if the scale of parent_font is NOT zero, otherwise the extents will be converted to a scale of zero (ie, they all become zero), then go through a division by zero! Changing the default scale addresses that, and plus, make "shape at font units" the default behavior. Objections? Cheers, -- behdad http://behdad.org/ _______________________________________________ HarfBuzz mailing list HarfBuzz@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/harfbuzz
