Re: [ft-devel] [ftgrid] Display rendered bitmap (new feature).

[Alexei Podtelezhnikov]

>>> Trying it on arial.ttf, I see some greenish artifacts at the pixel
>>> borders; similarly, the outline partially changes its colour
>>> depending on the zoom.  Is it possible to suppress these effects?
>>
>> I'm pretty sure that those are a graphics system caching bug.  There
>> is a cache of gradients to speed up blending with gamma.  This
>> feature stresses its limits because there is a lot more gradients to
>> cache as we blend on top of blending.
>
> With `graphics system' I assume that you mean FreeType's small
> graphics library, right?  Can you fix this problem?

I took a shot that felt right and it fixed the issue. Please review this:
http://git.savannah.gnu.org/cgit/freetype/freetype2-demos.git/commit/?id=f19f5989a355641617fe7ceadd2f6eabc43f7fa8