[cairo] fractional positioning + glyph caching

[Behdad Esfahbod]

On 13-06-16 06:51 AM, Cosmin Apreutesei wrote:
> Hi,
> 
> Does the cairo glyph cache support fractional positioning?

No.


> I tried:
>   - cairo_show_glyphs()  - caching but no frac. positioning
>   - cairo_glyph_path() / cairo_fill() - fact. positioning but no caching
>   - _cairo_font_options_set_round_glyph_positions(CAIRO_ROUND_GLYPH_POS_OFF)
> with both functions above - it has no effect.

Correct.


> A related question. I tried:
> 
> cairo_set_antialias(CAIRO_ANTIALIAS_SUBPIXEL)
> font_options:set_antialias(CAIRO_ANTIALIAS_SUBPIXEL)
> cairo_set_font_options(font_options)
> 
> but it does not affect cairo_show_glyphs(), which always renders in
> grayscale, but it does work with cairo_show_text() - a bug?

Not expected.  Test case?


> Also, I noticed that CAIRO_ANTIALIAS_BEST makes cairo_show_glyphs() to
> render each glyph horizontally stretched 3x - a bug?

Wow.  Definitely.

> Any hits appreciated,
> Cosmin.


-- 
behdad
http://behdad.org/