Re: bug of display-table & make-glyph-code

[martin rudalics]

> The problem is related to the way we encode face numbers in
> glyph codes (as an integer).
>
> The number of bits left over in a glyph code for the face number
> is vastly reduced on the unicode-2 branch, so as soon as we
> merge that to the trunk, the problem will certainly be
> visible on trunk.
>
> The solution is to find some other way to merge a face with a
> char-code to make a glyph code.  We have discussed this some
> time ago.
>
> One suggestion was to use a cons (CHAR . FACE_ID).
>
> Hiding such details was the main rationale for introducting the
> make-glyph-code function in 22.1

We should make sure that this is resolved before merging in the Unicode
branch.  What would you suggest to do?