[HarfBuzz] Adding tracing

[Khaled Hosny]

On Thu, May 13, 2010 at 05:01:32PM -0400, Behdad Esfahbod wrote:
> On 05/11/2010 02:09 PM, Martin Hosken wrote:
> > Dear All,
> > 
> > I've added tracing to harfbuzz-ng. This is to help font developers rather than programmers, figure out what is going on with their fonts. The cost is a simple if() for each lookup. If that is too high, we can probably make tracing optional.
> 
> 
> Thanks Martin,
> 
> I took a look. I'd rather do that as compile-time debugging like I do for
> sanitize and apply currently.  Will get to it when fleshing hb_shape() out.

But I think it would be a very interesting feature for font developers,
I use a similar feature in ConTeXt and it is quite handy in spotting
flawed logic and other hard to find errors.


-- 
 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer