Subject: Re: commit: Fixed the last of the screen artifacts. (fwd)
From: Martin Sevior (msevior@mccubbin.ph.unimelb.edu.au)
Date: Sat Jun 02 2001 - 04:45:25 CDT
On Fri, 1 Jun 2001, Thomas Fletcher wrote:
> On Fri, 1 Jun 2001, Patrick Lam wrote:
> >
> > Fixed the last of on screen dirt. The only remaining dirt comes from bogus
> > fonts like Times-New-Roman italic "f" which extends left underneath the
> > previous character.
> >
> > Martin
>
> Excuse me, but I think that this represents a serious mind
> set problem. There is absolutely nothing "bogus" about
> the fact that some characters and their ligatures may
> extend above/below other characters.
>
> The bogus factor is the mind set that AbiWord was created
> with in that all characters are a fixed width, and as a
> result you end up with very bad clipping when text is
> highlighted and things are not always properly re-drawn
> because the engine doesn't have enough information to
> properly redraw.
>
> Each character (at a minimum) should have a metric
> associated with it that indicates 1) A base width which
> can be used for highlighting 2) An extention before and
> after this base width which is used to properly re-draw
> characters which might be affected by any draw operations.
>
Ok I agree with you and Dom. I have an idea for a work around that should
fix 99% of the character dirt left by such fonts.
I'll try it out.
Cheers
Martin
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