Re: wxt terminal in windows hangs

[Allin C. <cot...@wf...>]

On Mon, 17 Jan 2011, sfeam (Ethan Merritt) wrote:

> On Monday, January 17, 2011, Allin Cottrell wrote:
> > On Mon, 17 Jan 2011, Allin Cottrell wrote:
> >
> > > On Tue, 18 Jan 2011, Mojca Miklavec wrote:
> > > >
> > > > My bet is that fc-cache runs in the background to regenerate font
> > > > index "every now and then", so that one can use any given font on the
> > > > system.
> >
> > (and this can take a looong time).
> >
> > I notice that in gnuplot's cp_cairo.c there's a comment (around
> > line 690) about "working around a bug in the cairo/win32 backend
> > for font rendering": the work-around involves gp_cairo on Windows
> > using the freetype + fontconfig backend by preference to the win32
> > backend.  Following Mojca's lead, this could explain the initial
> > long wait for gnuplot output.
> >
> > I'm wondering, is the cairo bug in question still there?
> > Unfortunately the comment is not specific (no bugzille ID). But if
> > the issue is fixed in current cairo it could be worth making a
> > change. Cairo's win32 backend doesn't have the problem of a long
> > wait on first use.
>
> Here's a link to the original thread reporting the problem
> in cairo's win32 backend:
>
> http://groups.google.com/group/comp.graphics.apps.gnuplot/browse_thread/thread/5742a3d915085f7b/d075063d7da423e9?hl=en&ie=UTF-8&oe=utf-8&q=missing+pixels+for+Windows+PNG+driver&pli=1

Thanks! I had a vague memory of that discussion but had forgotten
the details. There have been a fair number of commits in the
cairo-font-win32 area since then (14 months ago) so this is
probably worth revisiting. I'll try some testing with cairo 1.10.2
on Windows.

Allin Cottrell