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Re: Font selection weirdness

From: Jason Rumney
Subject: Re: Font selection weirdness
Date: Tue, 27 May 2008 17:10:25 +0100
User-agent: Thunderbird (Windows/20080421)

Juanma Barranquero wrote:
No, it's not reasonable. If you don't have a suitable font, then Emacs
should not be trying to display those characters.

I'll try to debug it. But, are you saying that clear_cached_metrics
should never be called, or that it should not be called for
TrueType/OpenFont fonts?

I thought I'd initialised things so that bitmap fonts would default to using unicode code points without needing to invalidate the metric cache when we change our mind later, but it turns out I hadn't. I made a change today that should mean that the function should never be called on Windows 2000/XP/Vista, unless there is a bug in the font drawing that continues to draw after finding the character is not supported, or a buggy truetype font that uses a glyph index other than 0 to indicate that a character is not supported.

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