On Mon, 2005-12-12 at 20:12 +0100, Juliusz Chroboczek wrote: > Keith, > > I'm not quite sure what you mean by ``round-trip'', but that might be > more difficult than you think: as you've surely noticed, fonttosfnt > crops glyphs by default, as there's no reason to propagate X's ``-c-'' > fonts into the SFNT world.
I hadn't really worried too much about this as it's purely a local optimization within the X server and is invisible to applications. However, if we want to propogate this 'feature', we can have the sfnt->bdf converter application detect 'ink inside' glyphs with constant escapements and convert them to char-cell fonts on the fly. > (This can be disabled, though, with the ``-c'' flag.) This isn't invisible as it affects the metrics seen by applications, a far more important characteristic than the modest speed improvements available for terminal emulators. Thanks for raising the issue though; its important to remember all of the vageries of the BDF format and its usage over the years by X. (/me really wishes he'd never raised the issue of ink vs glyph metrics) -keith
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