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truetypefs: fall back to width if advance is zero

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combining marks will have zero advance, but it results in zero-width
glyphs in subfonts.  fall back to width so something meaningful is
rendered even if its not combined properly.
This commit is contained in:
mischief 2018-10-12 08:34:17 -07:00
parent 3a41ce3bf3
commit aec4240c0c
1 changed files with 4 additions and 1 deletions
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5
sys/src/cmd/truetypefs.c
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@ -186,7 +186,10 @@ compilesub(TFont *f, TSubfont *s)
*p++ = 0;
*p++ = h;
*p++ = gs[i]->xminpx;
*p++ = gs[i]->advanceWidthpx;
if(gs[i]->advanceWidthpx != 0)
*p++ = gs[i]->advanceWidthpx;
else
*p++ = gs[i]->width;
x += gs[i]->width;
}
*p++ = x;