Re: [ft-devel] How to determine if horizontal hinting is happening?

[Behdad Esfahbod]

Hi Alexei,

Chromium, on many configurations, does do subpixel positioning.  Just because we say that, doesn't mean it doesn't cache bitmaps. I think Skia does, by default, a 4x1 subpixel grid. That's implementation details though.

On Tue, Feb 20, 2018 at 9:01 AM, Alexei Podtelezhnikov <address@hidden> wrote:

> I'm not an expert on how the code works, but my understanding is that
> subpixel positioning is the norm.

I highly doubt that Chromium implements subpixel positioning. This
isn't the norm.

- LCD (subpixel) rendering is about utilizing color channels
separately to improve glyph appearance.
- Subpixel position is freedom of placement of outlines relative to
pixel grid *before* rendering, so it is different.
- Kerning is about spacing of letter pairs like "AV". Again I am not
sure your bug is about that.
- Hinting is about improving contrast, relevant mostly to non-LCD rendering

You mention all of these in the bug report... This is intractable and
confusing. Can you identify specific problem and file bug report with
FreeType if you think it is our problem?

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behdad
http://behdad.org/