[HarfBuzz] No kerning?

[Nikolay Sivov]

On 05.10.2015 22:32, Jamie Dale wrote:
>
> The images below are using the Roboto font, and show the output from
> each implementation.
> The top image is using our "kerning only" implementation, and the bottom
> image is using HarfBuzz. Note that the "T" and "e" characters are
> further apart in the bottom image.

Roboto-Regular.ttf from https://github.com/google/roboto doesn't have 
'kern' table, so the only way to enable kerning for it is to use GPOS 
kern feature.

What does your "kerning only" implementation do? It only applies this 
GPOS feature skipping the rest of shaping/positioning stuff?