Re: [ft-devel] [RFC] FT_LCD_FILTER_HEAVY

[Werner LEMBERG]

> I'm not sure how the details would work (or IF it would work), but I
> think the best thing would be to add an arbitrary "filter" option
> where a string name and a signed int (or float?) value can be passed
> to fontconfig, and it will make a call to freetype using those.

Sounds sensible, but...

> That way, new filters and features (like brightness, contrast,
> gamma, sharpening, etc.) could be added to Freetype without
> requiring a change to fontconfig code (just fontconfig configuration
> files).

... how much of these features must reside within FreeType?  I really
would like to *not* have that stuff at all!

Cf. this thread:

  http://lists.gnu.org/archive/html/freetype/2011-09/msg00018.html

Ideally, the ideas laid out in this message should be handled
similarly, this, using hooks and/or separate modules, probably even in
a separate library.

> This would also require a change to Freetype, which I'd help with.

Great!

> Perhaps it would still have to use explicitly given fontconfig
> parameters like "filter1", "filter2", "filter3", up to 20 or so.
> The meaning of the values would vary depending on the filter chosen.

Here I don't have any opinion since I lack experience.


    Werner