GNOME Bugzilla – Bug 561907
Show explicit font coverage
Last modified: 2021-06-02 09:24:34 UTC
There is no easy way in gucharmap to check the actual coverage of a particular font. Sure you can right-click on individual glyphs, but that does not give you a comprehensive view gucharmap should distinguish by default between glyphs provided by a font and glyphs substituted from somewhere else, for example by using a different colour or background colour for substituted glyphs and scripts/unicode blocks that only include substituted glyphs Also there should be a checkbox somewhere that disabled substitution completely and only displayed glyphs and blocks of glyphs corresponding to the actual foint coverage
See also Christian Ohm’s proposition on http://bugs.debian.org/518811 “I'd like to have an option to show only characters from the selected font (or somehow mark those substituted from other fonts, like with a darker background), and in the Unicode Block/Script column show the percentage of the block/script covered by this font (with the option to hide those with 0%).”
*** Bug 578489 has been marked as a duplicate of this bug. ***
See also bug 579900, which says that disabling fallback font display is easy.
I'm a font developer, and I cannot state strongly enough how useful this feature would be. Simply adding an option to disable fallback display would be a decent start. One could then click through the scripts/blocks to find which glyphs actually displayed. If the scripts/blocks were colorized (bug 441196) this would be even easier. Colorizing the cells of substituted glyphs would be great. A "next/previous character in this font" command (maybe Ctrl+Shift+N, Ctrl+Shift+P) would also be great. Another option to display the glyphs without gaps (i.e. compact display) would be extremely helpful, too.
The 'disable fallback' option already exists, btw.
Ah…my system's package was 2.23.x. I built 3.1.x and see that option now.
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