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[layout] Fix comparison of GlyphID and hb_codepoint_t 

Before, the IntType::cmp functions providing this and was truncating
the hb_codepoint_t to 16bits before comparison.  I have no idea how
this was never discovered, and I'm too lazy to try to reproduce this
with Pango (which uses non-16bit codepoint numbers for missing glyphs).
This commit is contained in:
Behdad Esfahbod 2015-02-21 12:50:01 +03:00
parent 7cce809cb1
commit 5175300fba
1 changed files with 4 additions and 1 deletions
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5
src/hb-open-type-private.hh
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@ -660,7 +660,10 @@ struct Tag : ULONG
DEFINE_NULL_DATA (Tag, " ");
/* Glyph index number, same as uint16 (length = 16 bits) */
typedef USHORT GlyphID;
struct GlyphID : USHORT {
static inline int cmp (const GlyphID *a, const GlyphID *b) { return b->USHORT::cmp (*a); }
inline int cmp (hb_codepoint_t a) const { return (int) a - (int) *this; }
};
/* Script/language-system/feature index */
struct Index : USHORT {