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[unsafe-to-break] Allocate public bits from 0

This commit is contained in:
Behdad Esfahbod 2017-08-10 14:25:53 -07:00
parent 91ce0c45d6
commit 5287ccc935
2 changed files with 12 additions and 8 deletions
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5
src/hb-buffer.h
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@ -72,8 +72,9 @@ typedef struct hb_glyph_info_t {
} hb_glyph_info_t;
typedef enum { /*< flags >*/
HB_GLYPH_FLAG_UNSAFE_TO_BREAK = 0x00000002,
HB_GLYPH_FLAG_DEFINED = 0x00000002 /* OR of all defined flags */
HB_GLYPH_FLAG_UNSAFE_TO_BREAK = 0x00000001,
HB_GLYPH_FLAG_DEFINED = 0x00000001 /* OR of all defined flags */
} hb_glyph_flags_t;
/**

15
src/hb-ot-map.cc
View File

@ -138,7 +138,11 @@ hb_ot_map_builder_t::compile (hb_ot_map_t &m,
const int *coords,
unsigned int num_coords)
{
m.global_mask = 1;
ASSERT_STATIC (!(HB_GLYPH_FLAG_DEFINED & (HB_GLYPH_FLAG_DEFINED + 1)));
unsigned int global_bit_mask = HB_GLYPH_FLAG_DEFINED + 1;
unsigned int global_bit_shift = _hb_popcount32 (HB_GLYPH_FLAG_DEFINED);
m.global_mask = global_bit_mask;
unsigned int required_feature_index[2];
hb_tag_t required_feature_tag[2];
@ -190,8 +194,7 @@ hb_ot_map_builder_t::compile (hb_ot_map_t &m,
/* Allocate bits now */
unsigned int next_bit = 1;
next_bit++; /* Allocate for HB_GLYPH_FLAG_UNSAFE_TO_BREAK */
unsigned int next_bit = global_bit_shift + 1;
for (unsigned int i = 0; i < feature_infos.len; i++)
{
@ -251,8 +254,8 @@ hb_ot_map_builder_t::compile (hb_ot_map_t &m,
map->auto_zwj = !(info->flags & F_MANUAL_ZWJ);
if ((info->flags & F_GLOBAL) && info->max_value == 1) {
/* Uses the global bit */
map->shift = 0;
map->mask = 1;
map->shift = global_bit_shift;
map->mask = global_bit_mask;
} else {
map->shift = next_bit;
map->mask = (1u << (next_bit + bits_needed)) - (1u << next_bit);
@ -289,7 +292,7 @@ hb_ot_map_builder_t::compile (hb_ot_map_t &m,
add_lookups (m, face, table_index,
required_feature_index[table_index],
variations_index,
1 /* mask */);
global_bit_mask);
for (unsigned i = 0; i < m.features.len; i++)
if (m.features[i].stage[table_index] == stage)