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Fix the computation of unitsPerEm when the fontMatrix has some negative coefficients

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It's a follow-up of #18253.
This commit is contained in:
Calixte Denizet 2024-06-24 16:38:17 +02:00
parent 6784124a74
commit 42bb2b0737
4 changed files with 10 additions and 2 deletions
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4
src/core/fonts.js
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@ -799,7 +799,7 @@ function createOS2Table(properties, charstrings, override) {
const unitsPerEm =
override.unitsPerEm ||
(properties.fontMatrix
? 1 / Math.max(...properties.fontMatrix.slice(0, 4))
? 1 / Math.max(...properties.fontMatrix.slice(0, 4).map(Math.abs))
: 1000);
// if the font units differ to the PDF glyph space units
@ -3199,7 +3199,7 @@ class Font {
}
const unitsPerEm = properties.fontMatrix
? 1 / Math.max(...properties.fontMatrix.slice(0, 4))
? 1 / Math.max(...properties.fontMatrix.slice(0, 4).map(Math.abs))
: 1000;
const builder = new OpenTypeFileBuilder("\x4F\x54\x54\x4F");