revFontUnload Fail

[Roger Eller]

Thank you both for the research and actioning a plan to fix this problem.
I'm thinking that I only had my standalone running.  Possibly LiveCode too
in some cases, but I usually close it after building.

One thing I considered, but haven't tested is to set the font of the
objects which use it to empty in the standalone.  This would eliminate that
potential claim on the font before unloading it.

~Roger
On Aug 20, 2013 7:27 PM, "Trevor DeVore" <lists at mangomultimedia.com> wrote:

> On Tue, Aug 20, 2013 at 6:51 PM, Roger Eller <roger.e.eller at sealedair.com
> >wrote:
>
> > On Aug 20, 2013 5:53 PM, "J. Landman Gay" wrote:
> > >
> > > On 8/20/13 4:33 PM, Monte Goulding wrote:
> > >>
> > >> Do you have any other apps open that might be using the font?
> >
> > Nope.  I even made sure that the font is not installed on my system, so
> my
> > system is the same as the end users systems.
>
>
> Roger,
>
> What can happen (and what Monte is alluding to) is that any other
> application that is open and gets a list of available fonts may get a lock
> on the font file. Since revLoadFont loads the font into the global space,
> all applications will see it listed when asking the OS for a list of
> available fonts.
>
> I've seen this issue every so often with customers when they try to install
> updates to my application. I have a password font that gets locked by other
> apps on the system. That is what led me to investigate how revFontLoad
> works on Windows. Back when the external Windows 2000 was supported.
> Windows 2000 doesn't have the ability to load a font specifically for an
> app which is why revFontLoad works the way it does.
>
> Soon (hopefully), thanks to the pull request that Monte sent in, we will be
> able to keep the font loading specific to the app, not the entire OS.
>
> --
> Trevor DeVore
> Blue Mango Learning Systems
> www.clarify-it.com    -    www.screensteps.com
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