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[hmtx] Rename internal num_advances to num_long_metrics

This commit is contained in:
Behdad Esfahbod 2022-02-14 14:12:07 -06:00
parent 622cbc485f
commit be4ddcc30b
1 changed files with 28 additions and 28 deletions
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56
src/hb-ot-hmtx-table.hh
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@ -98,12 +98,12 @@ struct hmtxvmtx
hb_requires (hb_is_iterator (Iterator))>
void serialize (hb_serialize_context_t *c,
Iterator it,
unsigned num_advances)
unsigned num_long_metrics)
{
unsigned idx = 0;
for (auto _ : it)
{
if (idx < num_advances)
if (idx < num_long_metrics)
{
LongMetric lm;
lm.advance = _.first;
@ -128,17 +128,17 @@ struct hmtxvmtx
if (unlikely (!table_prime)) return_trace (false);
accelerator_t _mtx (c->plan->source);
unsigned num_advances;
unsigned num_long_metrics;
{
/* Determine num_advances to encode. */
/* Determine num_long_metrics to encode. */
auto& plan = c->plan;
num_advances = plan->num_output_glyphs ();
num_long_metrics = plan->num_output_glyphs ();
hb_codepoint_t old_gid = 0;
unsigned int last_advance = plan->old_gid_for_new_gid (num_advances - 1, &old_gid) ? _mtx.get_advance (old_gid) : 0;
while (num_advances > 1 &&
last_advance == (plan->old_gid_for_new_gid (num_advances - 2, &old_gid) ? _mtx.get_advance (old_gid) : 0))
unsigned int last_advance = plan->old_gid_for_new_gid (num_long_metrics - 1, &old_gid) ? _mtx.get_advance (old_gid) : 0;
while (num_long_metrics > 1 &&
last_advance == (plan->old_gid_for_new_gid (num_long_metrics - 2, &old_gid) ? _mtx.get_advance (old_gid) : 0))
{
num_advances--;
num_long_metrics--;
}
}
@ -153,13 +153,13 @@ struct hmtxvmtx
})
;
table_prime->serialize (c->serializer, it, num_advances);
table_prime->serialize (c->serializer, it, num_long_metrics);
if (unlikely (c->serializer->in_error ()))
return_trace (false);
// Amend header num hmetrics
if (unlikely (!subset_update_header (c->plan, num_advances)))
if (unlikely (!subset_update_header (c->plan, num_long_metrics)))
return_trace (false);
return_trace (true);
@ -174,28 +174,28 @@ struct hmtxvmtx
{
default_advance = default_advance_ ? default_advance_ : hb_face_get_upem (face);
num_advances = T::is_horizontal ?
face->table.hhea->numberOfLongMetrics :
num_long_metrics = T::is_horizontal ?
face->table.hhea->numberOfLongMetrics :
#ifndef HB_NO_VERTICAL
face->table.vhea->numberOfLongMetrics
face->table.vhea->numberOfLongMetrics
#else
0
0
#endif
;
;
table = hb_sanitize_context_t ().reference_table<hmtxvmtx> (face, T::tableTag);
/* Cap num_bearings and num_advances based on table length. */
/* Cap num_bearings and num_long_metrics based on table length. */
unsigned int len = table.get_length ();
if (unlikely (num_advances * 4 > len))
num_advances = len / 4;
num_bearings = num_advances + (len - 4 * num_advances) / 2;
if (unlikely (num_long_metrics * 4 > len))
num_long_metrics = len / 4;
num_bearings = num_long_metrics + (len - 4 * num_long_metrics) / 2;
/* We MUST set num_bearings to zero if num_advances is zero.
/* We MUST set num_bearings to zero if num_long_metrics is zero.
* Our get_advance() depends on that. */
if (unlikely (!num_advances))
if (unlikely (!num_long_metrics))
{
num_bearings = num_advances = 0;
num_bearings = num_long_metrics = 0;
table.destroy ();
table = hb_blob_get_empty ();
}
@ -210,14 +210,14 @@ struct hmtxvmtx
int get_side_bearing (hb_codepoint_t glyph) const
{
if (glyph < num_advances)
if (glyph < num_long_metrics)
return table->longMetricZ[glyph].sb;
if (unlikely (glyph >= num_bearings))
return 0;
const FWORD *bearings = (const FWORD *) &table->longMetricZ[num_advances];
return bearings[glyph - num_advances];
const FWORD *bearings = (const FWORD *) &table->longMetricZ[num_long_metrics];
return bearings[glyph - num_long_metrics];
}
int get_side_bearing (hb_font_t *font, hb_codepoint_t glyph) const
@ -250,7 +250,7 @@ struct hmtxvmtx
return default_advance;
}
return table->longMetricZ[hb_min (glyph, (uint32_t) num_advances - 1)].advance;
return table->longMetricZ[hb_min (glyph, (uint32_t) num_long_metrics - 1)].advance;
}
unsigned int get_advance (hb_codepoint_t glyph,
@ -272,7 +272,7 @@ struct hmtxvmtx
}
protected:
unsigned int num_advances;
unsigned int num_long_metrics;
unsigned int num_bearings;
unsigned int default_advance;