Prepare for MetaFont/PK font support. #30514
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QuLogic
reviewed
Sep 6, 2025
TeX MetaFont (.mf) fonts (e.g., from `\usepackage{concmath}`) need to be
converted to raster (.pk) fonts before usage. In dvipng or pdftex this
is done by invoking mktexpk via kpsewhich.
This patch ensures that our calls to kpsewhich likewise also generate
and finds the raster files (in Matplotlib's own temporary cache) when
needed. The resolution (600dpi) is the documented default (see e.g. the
-D option in `man kpsewhich`). Note that this is only a preliminary
step towards full MF/PK font support, which would also require parsing
the PK file and embedding the glyphs into our final output.
QuLogic
approved these changes
Sep 10, 2025
timhoffm
approved these changes
Sep 10, 2025
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| return ({} if self.resolve_path().match("*.600pk") else | ||
| PsfontsMap(find_tex_file("pdftex.map"))[self.texname].effects) |
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Very optional: I would not use a ternary operator here because that makes it harder to read. It's rather a return-early situation.
Suggested change
| return ({} if self.resolve_path().match("*.600pk") else | |
| PsfontsMap(find_tex_file("pdftex.map"))[self.texname].effects) | |
| if self.resolve_path().match("*.600pk"): | |
| return {} | |
| return PsfontsMap(find_tex_file("pdftex.map"))[self.texname].effects |
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TeX MetaFont (.mf) fonts (e.g., from
\usepackage{concmath}) need to be converted to raster (.pk) fonts before usage. In dvipng or pdftex this is done by invoking mktexpk via kpsewhich.This patch ensures that our calls to kpsewhich likewise also generate and finds the raster files (in Matplotlib's own temporary cache) when needed. The resolution (600dpi) is the documented default (see e.g. the -D option in
man kpsewhich). Note that this is only a preliminary step towards full MF/PK font support, which would also require parsing the PK file (which I have implemented elsewhere) and embedding the glyphs into our final output (for which I have a preliminary version in mplcairo).Work towards fixing #20469.
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