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Allowing Compound Glyphs with numberOfContours < -1

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While it is recommended that the numberOfContours are set to -1 for compound glyphs, it is allowed to have any negative value. Source: https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6glyf.html

However, I don't know if this happens in practice.
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Brotcrunsher 2019-04-30 16:30:03 +02:00 committed by GitHub
parent 2c2908f505
commit f7d1cd581e
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1 changed files with 1 additions and 4 deletions
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stb_truetype.h
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@ -1757,7 +1757,7 @@ static int stbtt__GetGlyphShapeTT(const stbtt_fontinfo *info, int glyph_index, s
} }
} }
num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy); num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy);
} else if (numberOfContours == -1) { } else if (numberOfContours < 0) {
// Compound shapes. // Compound shapes.
int more = 1; int more = 1;
stbtt_uint8 *comp = data + g + 10; stbtt_uint8 *comp = data + g + 10;
@ -1834,9 +1834,6 @@ static int stbtt__GetGlyphShapeTT(const stbtt_fontinfo *info, int glyph_index, s
// More components ? // More components ?
more = flags & (1<<5); more = flags & (1<<5);
} }
} else if (numberOfContours < 0) {
// @TODO other compound variations?
STBTT_assert(0);
} else { } else {
// numberOfCounters == 0, do nothing // numberOfCounters == 0, do nothing
} }