Re: [ngl-devel] nglFontLayout perfs

[Vincent Caron]

Sebastien Metrot wrote:
> Going from nglFont1 to nglFont have been quite a perf hit for nui. Maybe 
> we are not using it correctly and you could advise us after a quick look 
> at the code?

  nuiLabel code looks alright. Maybe it would be simpler if the layout 
was actually a non-dynamic member, but you could not change the font in 
a single lifecycle of the widget. Maybe we could add font switching in 
nglFontLayout (I remember I had one good reason not to do it, but forgot 
it :)).

  Otherwise, there is something really odd in nglFontBase : the 
FreeType cache is set to 2KB! nglFontLayout::GetMetrics _will_ be slow 
as hell since it will rasterize glyphs everytime. I must have postponed 
this problem and set an horrible number to make sure it would not be 
forgotten. Rats, missed.

  I really don't know what number will do. Will depends on the target. 
I'll put a good megabyte and wait for complaints about heavy memory 
usage by nglFontBase. It's only a limit, it will eat less if you require 
less (growing buffer).

  Fix commited.