font-patcher: Fix crash on some custom sets #1006
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[why] When a custom set is to be patched and that set contains the .notdef glyph the script crashes. [how] The glyphs has an unicode codepoint of -1, a code that we explicitely not patch. That leads to confusion when we try to determine the codepoint to be used for that glyph, because it has none. Exclude negative codepoint glyphs when we determine the selection of to-be-patched glyphs. As last resort for broken custom sets skip over glyphs that come out of order (which should be impossible). Fixes: #1005 Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>
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Description
[why]
When a custom set is to be patched and that set contains the
.notdefglyph the script crashes.[how]
The glyphs has an unicode codepoint of -1, a code that we explicitely not patch. That leads to confusion when we try to determine the codepoint to be used for that glyph, because it has none.
Exclude negative codepoint glyphs when we determine the selection of to-be-patched glyphs.
As last resort for broken custom sets skip over glyphs that come out of order (which should be impossible).
Fixes: #1005
Requirements / Checklist
What does this Pull Request (PR) do?
Allow patching with custom sets that contain the
notdefglyph.How should this be manually tested?
Any background context you can provide?
What are the relevant tickets (if any)?
Screenshots (if appropriate or helpful)