diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-open-file-private.hh')
-rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-open-file-private.hh | 56 |
1 files changed, 34 insertions, 22 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-open-file-private.hh b/src/3rdparty/harfbuzz-ng/src/hb-open-file-private.hh index 5357ddcf5b..644e0b40f6 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-open-file-private.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-open-file-private.hh @@ -53,6 +53,9 @@ struct TTCHeader; typedef struct TableRecord { + int cmp (Tag t) const + { return t.cmp (tag); } + inline bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); @@ -61,9 +64,9 @@ typedef struct TableRecord Tag tag; /* 4-byte identifier. */ CheckSum checkSum; /* CheckSum for this table. */ - ULONG offset; /* Offset from beginning of TrueType font + UINT32 offset; /* Offset from beginning of TrueType font * file. */ - ULONG length; /* Length of this table. */ + UINT32 length; /* Length of this table. */ public: DEFINE_SIZE_STATIC (16); } OpenTypeTable; @@ -73,27 +76,39 @@ typedef struct OffsetTable friend struct OpenTypeFontFile; inline unsigned int get_table_count (void) const - { return numTables; } + { return tables.len; } inline const TableRecord& get_table (unsigned int i) const { - if (unlikely (i >= numTables)) return Null(TableRecord); return tables[i]; } + inline unsigned int get_table_tags (unsigned int start_offset, + unsigned int *table_count, /* IN/OUT */ + hb_tag_t *table_tags /* OUT */) const + { + if (table_count) + { + if (start_offset >= tables.len) + *table_count = 0; + else + *table_count = MIN<unsigned int> (*table_count, tables.len - start_offset); + + const TableRecord *sub_tables = tables.array + start_offset; + unsigned int count = *table_count; + for (unsigned int i = 0; i < count; i++) + table_tags[i] = sub_tables[i].tag; + } + return tables.len; + } inline bool find_table_index (hb_tag_t tag, unsigned int *table_index) const { Tag t; t.set (tag); - unsigned int count = numTables; - for (unsigned int i = 0; i < count; i++) - { - if (t == tables[i].tag) - { - if (table_index) *table_index = i; - return true; - } - } - if (table_index) *table_index = Index::NOT_FOUND_INDEX; - return false; + /* Linear-search for small tables to work around fonts with unsorted + * table list. */ + int i = tables.len < 64 ? tables.lsearch (t) : tables.bsearch (t); + if (table_index) + *table_index = i == -1 ? Index::NOT_FOUND_INDEX : (unsigned int) i; + return i != -1; } inline const TableRecord& get_table_by_tag (hb_tag_t tag) const { @@ -106,16 +121,13 @@ typedef struct OffsetTable inline bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && c->check_array (tables, TableRecord::static_size, numTables)); + return_trace (c->check_struct (this) && tables.sanitize (c)); } protected: Tag sfnt_version; /* '\0\001\0\00' if TrueType / 'OTTO' if CFF */ - USHORT numTables; /* Number of tables. */ - USHORT searchRangeZ; /* (Maximum power of 2 <= numTables) x 16 */ - USHORT entrySelectorZ; /* Log2(maximum power of 2 <= numTables). */ - USHORT rangeShiftZ; /* NumTables x 16-searchRange. */ - TableRecord tables[VAR]; /* TableRecord entries. numTables items */ + BinSearchArrayOf<TableRecord> + tables; public: DEFINE_SIZE_ARRAY (12, tables); } OpenTypeFontFace; @@ -142,7 +154,7 @@ struct TTCHeaderVersion1 Tag ttcTag; /* TrueType Collection ID string: 'ttcf' */ FixedVersion<>version; /* Version of the TTC Header (1.0), * 0x00010000u */ - ArrayOf<OffsetTo<OffsetTable, ULONG>, ULONG> + ArrayOf<LOffsetTo<OffsetTable>, UINT32> table; /* Array of offsets to the OffsetTable for each font * from the beginning of the file */ public: |