[Bug 299158] Re: DejaVu, Liberation Mono, Noto Mono, Tlwg Mono, Oxygen Mono, Bitstream Vera Mono: Combining diacritics out of place

[Nate]

This is a problem even at the desktop level. With the gnome desktop font
set to the default 'Ubuntu 11' if I use an app (gImageReader in my case,
see also https://github.com/manisandro/gImageReader/issues/613) to write
certain decomposed characters (e.g. \u0069\u0300), they are not properly
combined on the screen. This is a bad user experience. I've switched to
'DejaVu Sans 11' as a workaround, as it seems to handle everything
correctly so far. However, the related DejaVu Sans Mono Book still
messes this up (e.g. in gnome-terminal and gedit), but on different
combined characters. So for monospace needs I've found FreeMono to cover
the most ground (pkg: fonts-freefont-ttf). Try this, while switching
between the default gnome-terminal font (Ubuntu Mono?) and DejaVu Sans
Mono Book:

$ echo -e '\u0069\u0300\u0020\u0254\u0327'
ì ɔ̧

The ì renders correctly while the open o + cedilla doesn't, both here
and with the terminal font set to DejaVu Sans Mono Book, but if you
switch to the default font in the terminal the open o + cedilla renders
correctly while the ì renders with both the dot and the grave accent on
top of each other, rather than the dot disappearing like it should.

I would guess that the related font definitions (Ubuntu Regular/Mono,
DejaVu Sans Mono, possibly others) are simply incomplete when it comes
to these less common character combinations.

font-manager has been very helpful for side-by-side comparisons of
sample text in multiple fonts.

** Bug watch added: github.com/manisandro/gImageReader/issues #613
   https://github.com/manisandro/gImageReader/issues/613

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https://bugs.launchpad.net/bugs/299158

Title:
  DejaVu, Liberation Mono, Noto Mono, Tlwg Mono, Oxygen Mono, Bitstream
  Vera Mono: Combining diacritics out of place

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