[HarfBuzz] Arabic and diacritics: problems with Arial and Arial Unicode

Evan Martin evan at chromium.org
Mon Jul 11 15:20:04 PDT 2011

This is the hack we did in Chrome (to the old Harfbuzz):

On Mon, Jul 11, 2011 at 3:09 PM, Grigori Goronzy <greg at chown.ath.cx> wrote:
> Hi,
> I'm having some odd issues with Arial and Arial Unicode. When I use
> these fonts to render Arabic text with diacritics, there are "gaps"
> inside the words. The diacritics have non-zero advance, this seems to
> cause it. Are these fonts just buggy or am I doing something wrong?
> There are no such problems with other fonts, such as DejaVu Sans.
> What is the correct way to render all glyphs that belong to a certain
> cluster? I'm a bit at loss at the moment.
> Best regards,
> Grigori
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