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[autofit] Prevent signed integer overflow.

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Reported as

  https://issues.oss-fuzz.com/issues/473582304

* src/autofit/afloader.c (af_loader_load_glyph): Use `ADD_LONG`.
This commit is contained in:
Werner Lemberg 2026-01-06 05:36:16 +01:00
parent 26adb9ff98
commit 4553f1c396
1 changed files with 4 additions and 2 deletions
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6
src/autofit/afloader.c
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@ -532,8 +532,10 @@
slot->metrics.horiBearingX = bbox.xMin;
slot->metrics.horiBearingY = bbox.yMax;
slot->metrics.vertBearingX = FT_PIX_FLOOR( bbox.xMin + vvector.x );
slot->metrics.vertBearingY = FT_PIX_FLOOR( bbox.yMax + vvector.y );
slot->metrics.vertBearingX = FT_PIX_FLOOR( ADD_LONG( bbox.xMin,
vvector.x ) );
slot->metrics.vertBearingY = FT_PIX_FLOOR( ADD_LONG( bbox.yMax,
vvector.y ) );
/* for mono-width fonts (like Andale, Courier, etc.) we need */
/* to keep the original rounded advance width; ditto for */