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[kerx] Clean up Format0

This commit is contained in:
Behdad Esfahbod 2018-10-07 22:33:41 -04:00
parent 4c3b19d52e
commit ed2a404272
1 changed files with 14 additions and 38 deletions
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52
src/hb-aat-layout-kerx-table.hh
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@ -30,6 +30,7 @@
#include "hb-open-type.hh"
#include "hb-aat-layout-common.hh"
#include "hb-ot-kern-table.hh"
/*
* kerx -- Extended Kerning
@ -43,33 +44,17 @@ namespace AAT {
using namespace OT;
struct KerxFormat0Records
{
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this)));
}
protected:
GlyphID left;
GlyphID right;
FWORD value;
public:
DEFINE_SIZE_STATIC (6);
};
struct KerxSubTableFormat0
{
// TODO(ebraminio) Enable when we got suitable BinSearchArrayOf
// inline int get_kerning (hb_codepoint_t left, hb_codepoint_t right) const
// {
// hb_glyph_pair_t pair = {left, right};
// int i = pairs.bsearch (pair);
// if (i == -1)
// return 0;
// return pairs[i].get_kerning ();
// }
inline int get_kerning (hb_codepoint_t left, hb_codepoint_t right) const
{
hb_glyph_pair_t pair = {left, right};
int i = pairs.bsearch (pair);
if (i == -1)
return 0;
return pairs[i].get_kerning ();
}
inline bool apply (hb_aat_apply_context_t *c) const
{
TRACE_APPLY (this);
@ -82,23 +67,14 @@ struct KerxSubTableFormat0
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) &&
recordsZ.sanitize (c, nPairs)));
return_trace (likely (pairs.sanitize (c)));
}
protected:
// TODO(ebraminio): A custom version of "BinSearchArrayOf<KerxPair> pairs;" is
// needed here to use HBUINT32 instead
HBUINT32 nPairs; /* The number of kerning pairs in this subtable */
HBUINT32 searchRange; /* The largest power of two less than or equal to the value of nPairs,
* multiplied by the size in bytes of an entry in the subtable. */
HBUINT32 entrySelector; /* This is calculated as log2 of the largest power of two less
* than or equal to the value of nPairs. */
HBUINT32 rangeShift; /* The value of nPairs minus the largest power of two less than or equal to nPairs. */
UnsizedArrayOf<KerxFormat0Records>
recordsZ; /* VAR=nPairs */
BinSearchArrayOf<KernPair, HBUINT32>
pairs; /* Sorted kern records. */
public:
DEFINE_SIZE_ARRAY (16, recordsZ);
DEFINE_SIZE_ARRAY (16, pairs);
};
struct KerxSubTableFormat1