Thank you Behdad, that is important information to me. It seems I will need a mix of pango+harfbuzz. pango to itemzime+font-fallback and harfbuzz for shaping (with font features support, linear layout).
Do you happen to know what the browsers (firefox, webkit) are doing ? Back to rendering, as far as glyph rasterization goes, is there anything I can do with cairo/pangocairo that I can't do directly with freetype ? Basically I need 8bpp grayscale and 24bpp LCD masks (which I'll upload to an opengl texture). Ideally I need to produce subpixel text positioned glyphs (at 0, .33, .66). Thanks Felipe On Tue, Jun 11, 2013 at 5:41 PM, Behdad Esfahbod <[email protected]> wrote: > On 13-06-10 06:04 PM, Felipe Heidrich wrote: > > Hello, > > > > I'm evaluating pango and harfbuzz to use with javafx and I have a couple > > questions: > > > > 1) Advance typographic features (i.e > > http://dev.w3.org/csswg/css-fonts/#font-rend-props) > > In pango I was only able to find support for small caps (in PangoVariant) > > Correct. Pango doesn't currently have API to enable those. Though, it's > straightforward to add. > > > > In harfbuzz, hb_shape() takes an array of hb_features_t. I suppose any > feature > > available in the font can be selected using harfbuzz ? > > Yes. > > > > 2) glyph advances > > Is there any difference between glyph advances produced harfbuzz and > pango ? > > I would like, if possible, to use linear (non-hinted) advances. > > No. With HarfBuzz you have more control over things, but if you disable > hinting and request a font at a large size you are good to go. > > > > Note that I started with pango since it provides a complete solution > including > > -itemizer (not mandatory for me) > > -shaper > > -font fallback (I think) > > -glyph metrics (xMax, yMax, xMin, yMin) > > -glyph images > > -glyph outlines > > Correct. > > > > Turns out that for most of what I'm doing I also need either cairo or > freetype > > to work with pango. > > I'm not 100% on this one, but using cairo does not provide anything > extra (as > > it seems cairo uses freetype). > > So instead of using pango+cairo or (pango+freetype) I could directly use > > freetype (for glyph images/outlines/metrics) and harfbuzz (for shaping > complex > > text). > > You can. But you have to deal with itemizing, bidi, font fallback, etc, > yourself. > > behdad > > > > Please advise. > > > > Thank you > > Felipe > > > > > > > > _______________________________________________ > > HarfBuzz mailing list > > [email protected] > > http://lists.freedesktop.org/mailman/listinfo/harfbuzz > > > > -- > behdad > http://behdad.org/ >
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