BTW, checkout DejaVuSans at 4pt. I see all kinds of triangular artifacts. On 06/07/2012 12:40 PM, Behdad Esfahbod wrote: > On 06/05/2012 01:56 AM, Werner LEMBERG wrote: >> >>> I was playing with Unicode box characters, and noticed that DejaVu >>> Sans creates the glyph for ▟ out of three quadrant boxes. At >>> different sizes I can see very noticeable seams where the sub-glyphs >>> meet. I thought FreeType would handle these cases better, but seems >>> like I'm wrong. Any ideas? Does FreeType combine all contours >>> together and rasterize them in one pass, or raster them separately >>> and combine? >> >> They are rasterized in a single pass. However, the DejaVu font >> doesn't contain the necessary bytecode to properly handle the rounding >> issues which inevitably happen if subglyphs are combined -- in ftview, >> press key `f' to force autohinting, and you won't see seams. I've >> just confirmed that exactly the same issue is present with the Windows >> rasterizer, so it's not a FreeType problem. > > Thanks Werner for looking into this! Great time for asking then: are subglyph > positions rounded as part of the hinting process? > > behdad > >> Of course, a much simpler (and probably even better) solution is to >> avoid subglyphs if they touch at longer lines. >> >> >> Werner
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