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authorAkira Kakuto <kakuto@fuk.kindai.ac.jp>2018-09-11 04:13:36 +0000
committerAkira Kakuto <kakuto@fuk.kindai.ac.jp>2018-09-11 04:13:36 +0000
commit683672628fe7bb6a6c5e71735942eb1b5fcae0a6 (patch)
treeb01fc67059d533445d1bc8826f03c5055af389c2 /Build/source/libs/harfbuzz/harfbuzz-src/src/hb-open-file.hh
parentc9d2cebb0c8eac1a2f3f6aac9031c9957cf956aa (diff)
harfbuzz 1.9.0
git-svn-id: svn://tug.org/texlive/trunk@48641 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-src/src/hb-open-file.hh')
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diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-open-file.hh b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-open-file.hh
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+/*
+ * Copyright © 2007,2008,2009 Red Hat, Inc.
+ * Copyright © 2012 Google, Inc.
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Red Hat Author(s): Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_OPEN_FILE_HH
+#define HB_OPEN_FILE_HH
+
+#include "hb-open-type.hh"
+#include "hb-ot-head-table.hh"
+
+
+namespace OT {
+
+
+/*
+ *
+ * The OpenType Font File
+ *
+ */
+
+
+/*
+ * Organization of an OpenType Font
+ */
+
+struct OpenTypeFontFile;
+struct OffsetTable;
+struct TTCHeader;
+
+
+typedef struct TableRecord
+{
+ int cmp (Tag t) const
+ { return -t.cmp (tag); }
+
+ static int cmp (const void *pa, const void *pb)
+ {
+ const TableRecord *a = (const TableRecord *) pa;
+ const TableRecord *b = (const TableRecord *) pb;
+ return b->cmp (a->tag);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this));
+ }
+
+ Tag tag; /* 4-byte identifier. */
+ CheckSum checkSum; /* CheckSum for this table. */
+ Offset32 offset; /* Offset from beginning of TrueType font
+ * file. */
+ HBUINT32 length; /* Length of this table. */
+ public:
+ DEFINE_SIZE_STATIC (16);
+} OpenTypeTable;
+
+typedef struct OffsetTable
+{
+ friend struct OpenTypeFontFile;
+
+ inline unsigned int get_table_count (void) const
+ { return tables.len; }
+ inline const TableRecord& get_table (unsigned int i) const
+ {
+ 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.arrayZ + 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);
+ /* 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 ? (unsigned) Index::NOT_FOUND_INDEX : (unsigned) i;
+ return i != -1;
+ }
+ inline const TableRecord& get_table_by_tag (hb_tag_t tag) const
+ {
+ unsigned int table_index;
+ find_table_index (tag, &table_index);
+ return get_table (table_index);
+ }
+
+ public:
+
+ inline bool serialize (hb_serialize_context_t *c,
+ hb_tag_t sfnt_tag,
+ Supplier<hb_tag_t> &tags,
+ Supplier<hb_blob_t *> &blobs,
+ unsigned int table_count)
+ {
+ TRACE_SERIALIZE (this);
+ /* Alloc 12 for the OTHeader. */
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ /* Write sfntVersion (bytes 0..3). */
+ sfnt_version.set (sfnt_tag);
+ /* Take space for numTables, searchRange, entrySelector, RangeShift
+ * and the TableRecords themselves. */
+ if (unlikely (!tables.serialize (c, table_count))) return_trace (false);
+
+ const char *dir_end = (const char *) c->head;
+ HBUINT32 *checksum_adjustment = nullptr;
+
+ /* Write OffsetTables, alloc for and write actual table blobs. */
+ for (unsigned int i = 0; i < table_count; i++)
+ {
+ TableRecord &rec = tables.arrayZ[i];
+ hb_blob_t *blob = blobs[i];
+ rec.tag.set (tags[i]);
+ rec.length.set (hb_blob_get_length (blob));
+ rec.offset.serialize (c, this);
+
+ /* Allocate room for the table and copy it. */
+ char *start = (char *) c->allocate_size<void> (rec.length);
+ if (unlikely (!start)) {return false;}
+
+ memcpy (start, hb_blob_get_data (blob, nullptr), rec.length);
+
+ /* 4-byte allignment. */
+ c->align (4);
+ const char *end = (const char *) c->head;
+
+ if (tags[i] == HB_OT_TAG_head && end - start >= head::static_size)
+ {
+ head *h = (head *) start;
+ checksum_adjustment = &h->checkSumAdjustment;
+ checksum_adjustment->set (0);
+ }
+
+ rec.checkSum.set_for_data (start, end - start);
+ }
+ tags += table_count;
+ blobs += table_count;
+
+ tables.qsort ();
+
+ if (checksum_adjustment)
+ {
+ CheckSum checksum;
+
+ /* The following line is a slower version of the following block. */
+ //checksum.set_for_data (this, (const char *) c->head - (const char *) this);
+ checksum.set_for_data (this, dir_end - (const char *) this);
+ for (unsigned int i = 0; i < table_count; i++)
+ {
+ TableRecord &rec = tables.arrayZ[i];
+ checksum.set (checksum + rec.checkSum);
+ }
+
+ checksum_adjustment->set (0xB1B0AFBAu - checksum);
+ }
+
+ return_trace (true);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this) && tables.sanitize (c));
+ }
+
+ protected:
+ Tag sfnt_version; /* '\0\001\0\00' if TrueType / 'OTTO' if CFF */
+ BinSearchArrayOf<TableRecord>
+ tables;
+ public:
+ DEFINE_SIZE_ARRAY (12, tables);
+} OpenTypeFontFace;
+
+
+/*
+ * TrueType Collections
+ */
+
+struct TTCHeaderVersion1
+{
+ friend struct TTCHeader;
+
+ inline unsigned int get_face_count (void) const { return table.len; }
+ inline const OpenTypeFontFace& get_face (unsigned int i) const { return this+table[i]; }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (table.sanitize (c, this));
+ }
+
+ protected:
+ Tag ttcTag; /* TrueType Collection ID string: 'ttcf' */
+ FixedVersion<>version; /* Version of the TTC Header (1.0),
+ * 0x00010000u */
+ LArrayOf<LOffsetTo<OffsetTable> >
+ table; /* Array of offsets to the OffsetTable for each font
+ * from the beginning of the file */
+ public:
+ DEFINE_SIZE_ARRAY (12, table);
+};
+
+struct TTCHeader
+{
+ friend struct OpenTypeFontFile;
+
+ private:
+
+ inline unsigned int get_face_count (void) const
+ {
+ switch (u.header.version.major) {
+ case 2: /* version 2 is compatible with version 1 */
+ case 1: return u.version1.get_face_count ();
+ default:return 0;
+ }
+ }
+ inline const OpenTypeFontFace& get_face (unsigned int i) const
+ {
+ switch (u.header.version.major) {
+ case 2: /* version 2 is compatible with version 1 */
+ case 1: return u.version1.get_face (i);
+ default:return Null(OpenTypeFontFace);
+ }
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ if (unlikely (!u.header.version.sanitize (c))) return_trace (false);
+ switch (u.header.version.major) {
+ case 2: /* version 2 is compatible with version 1 */
+ case 1: return_trace (u.version1.sanitize (c));
+ default:return_trace (true);
+ }
+ }
+
+ protected:
+ union {
+ struct {
+ Tag ttcTag; /* TrueType Collection ID string: 'ttcf' */
+ FixedVersion<>version; /* Version of the TTC Header (1.0 or 2.0),
+ * 0x00010000u or 0x00020000u */
+ } header;
+ TTCHeaderVersion1 version1;
+ } u;
+};
+
+/*
+ * Mac Resource Fork
+ */
+
+struct ResourceRefItem
+{
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ // actual data sanitization is done on ResourceForkHeader sanitizer
+ return_trace (likely (c->check_struct (this)));
+ }
+
+ HBINT16 id; /* Resource ID, is really should be signed? */
+ HBINT16 nameOffset; /* Offset from beginning of resource name list
+ * to resource name, minus means there is no */
+ HBUINT8 attr; /* Resource attributes */
+ HBUINT24 dataOffset; /* Offset from beginning of resource data to
+ * data for this resource */
+ HBUINT32 reserved; /* Reserved for handle to resource */
+ public:
+ DEFINE_SIZE_STATIC (12);
+};
+
+struct ResourceTypeItem
+{
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ // RefList sanitization is done on ResourceMap sanitizer
+ return_trace (likely (c->check_struct (this)));
+ }
+
+ inline unsigned int get_resource_count () const
+ {
+ return numRes + 1;
+ }
+
+ inline bool is_sfnt () const
+ {
+ return type == HB_TAG ('s','f','n','t');
+ }
+
+ inline const ResourceRefItem& get_ref_item (const void *base,
+ unsigned int i) const
+ {
+ return (base+refList)[i];
+ }
+
+ protected:
+ Tag type; /* Resource type */
+ HBUINT16 numRes; /* Number of resource this type in map minus 1 */
+ OffsetTo<UnsizedArrayOf<ResourceRefItem> >
+ refList; /* Offset from beginning of resource type list
+ * to reference list for this type */
+ public:
+ DEFINE_SIZE_STATIC (8);
+};
+
+struct ResourceMap
+{
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ if (unlikely (!c->check_struct (this)))
+ return_trace (false);
+ for (unsigned int i = 0; i < get_types_count (); ++i)
+ {
+ const ResourceTypeItem& type = get_type (i);
+ if (unlikely (!type.sanitize (c)))
+ return_trace (false);
+ for (unsigned int j = 0; j < type.get_resource_count (); ++j)
+ if (unlikely (!get_ref_item (type, j).sanitize (c)))
+ return_trace (false);
+ }
+ return_trace (true);
+ }
+
+ inline const ResourceTypeItem& get_type (unsigned int i) const
+ {
+ // Why offset from the second byte of the object? I'm not sure
+ return ((&reserved[2])+typeList)[i];
+ }
+
+ inline unsigned int get_types_count () const
+ {
+ return nTypes + 1;
+ }
+
+ inline const ResourceRefItem &get_ref_item (const ResourceTypeItem &type,
+ unsigned int i) const
+ {
+ return type.get_ref_item (&(this+typeList), i);
+ }
+
+ inline const PString& get_name (const ResourceRefItem &item,
+ unsigned int i) const
+ {
+ if (item.nameOffset == -1)
+ return Null (PString);
+
+ return StructAtOffset<PString> (this, nameList + item.nameOffset);
+ }
+
+ protected:
+ HBUINT8 reserved[16]; /* Reserved for copy of resource header */
+ LOffsetTo<ResourceMap>
+ reserved1; /* Reserved for handle to next resource map */
+ HBUINT16 reserved2; /* Reserved for file reference number */
+ HBUINT16 attr; /* Resource fork attribute */
+ OffsetTo<UnsizedArrayOf<ResourceTypeItem> >
+ typeList; /* Offset from beginning of map to
+ * resource type list */
+ HBUINT16 nameList; /* Offset from beginning of map to
+ * resource name list */
+ HBUINT16 nTypes; /* Number of types in the map minus 1 */
+ public:
+ DEFINE_SIZE_STATIC (30);
+};
+
+struct ResourceForkHeader
+{
+ inline unsigned int get_face_count () const
+ {
+ const ResourceMap &resource_map = this+map;
+ for (unsigned int i = 0; i < resource_map.get_types_count (); ++i)
+ {
+ const ResourceTypeItem& type = resource_map.get_type (i);
+ if (type.is_sfnt ())
+ return type.get_resource_count ();
+ }
+ return 0;
+ }
+
+ inline const LArrayOf<HBUINT8>& get_data (const ResourceTypeItem& type,
+ unsigned int idx) const
+ {
+ const ResourceMap &resource_map = this+map;
+ unsigned int offset = dataOffset;
+ offset += resource_map.get_ref_item (type, idx).dataOffset;
+ return StructAtOffset<LArrayOf<HBUINT8> > (this, offset);
+ }
+
+ inline const OpenTypeFontFace& get_face (unsigned int idx) const
+ {
+ const ResourceMap &resource_map = this+map;
+ for (unsigned int i = 0; i < resource_map.get_types_count (); ++i)
+ {
+ const ResourceTypeItem& type = resource_map.get_type (i);
+ if (type.is_sfnt () && idx < type.get_resource_count ())
+ return (OpenTypeFontFace&) get_data (type, idx).arrayZ;
+ }
+ return Null (OpenTypeFontFace);
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ if (unlikely (!c->check_struct (this)))
+ return_trace (false);
+
+ const ResourceMap &resource_map = this+map;
+ if (unlikely (!resource_map.sanitize (c)))
+ return_trace (false);
+
+ for (unsigned int i = 0; i < resource_map.get_types_count (); ++i)
+ {
+ const ResourceTypeItem& type = resource_map.get_type (i);
+ for (unsigned int j = 0; j < type.get_resource_count (); ++j)
+ {
+ const LArrayOf<HBUINT8>& data = get_data (type, j);
+ if (unlikely (!(data.sanitize (c) &&
+ ((OpenTypeFontFace&) data.arrayZ).sanitize (c))))
+ return_trace (false);
+ }
+ }
+
+ return_trace (true);
+ }
+
+ protected:
+ HBUINT32 dataOffset; /* Offset from beginning of resource fork
+ * to resource data */
+ LOffsetTo<ResourceMap>
+ map; /* Offset from beginning of resource fork
+ * to resource map */
+ HBUINT32 dataLen; /* Length of resource data */
+ HBUINT32 mapLen; /* Length of resource map */
+ public:
+ DEFINE_SIZE_STATIC (16);
+};
+
+/*
+ * OpenType Font File
+ */
+
+struct OpenTypeFontFile
+{
+ enum {
+ CFFTag = HB_TAG ('O','T','T','O'), /* OpenType with Postscript outlines */
+ TrueTypeTag = HB_TAG ( 0 , 1 , 0 , 0 ), /* OpenType with TrueType outlines */
+ TTCTag = HB_TAG ('t','t','c','f'), /* TrueType Collection */
+ DFontTag = HB_TAG ( 0 , 0 , 1 , 0 ), /* DFont Mac Resource Fork */
+ TrueTag = HB_TAG ('t','r','u','e'), /* Obsolete Apple TrueType */
+ Typ1Tag = HB_TAG ('t','y','p','1') /* Obsolete Apple Type1 font in SFNT container */
+ };
+
+ inline hb_tag_t get_tag (void) const { return u.tag; }
+
+ inline unsigned int get_face_count (void) const
+ {
+ switch (u.tag) {
+ case CFFTag: /* All the non-collection tags */
+ case TrueTag:
+ case Typ1Tag:
+ case TrueTypeTag: return 1;
+ case TTCTag: return u.ttcHeader.get_face_count ();
+// case DFontTag: return u.rfHeader.get_face_count ();
+ default: return 0;
+ }
+ }
+ inline const OpenTypeFontFace& get_face (unsigned int i) const
+ {
+ switch (u.tag) {
+ /* Note: for non-collection SFNT data we ignore index. This is because
+ * Apple dfont container is a container of SFNT's. So each SFNT is a
+ * non-TTC, but the index is more than zero. */
+ case CFFTag: /* All the non-collection tags */
+ case TrueTag:
+ case Typ1Tag:
+ case TrueTypeTag: return u.fontFace;
+ case TTCTag: return u.ttcHeader.get_face (i);
+// case DFontTag: return u.rfHeader.get_face (i);
+ default: return Null(OpenTypeFontFace);
+ }
+ }
+
+ inline bool serialize_single (hb_serialize_context_t *c,
+ hb_tag_t sfnt_tag,
+ Supplier<hb_tag_t> &tags,
+ Supplier<hb_blob_t *> &blobs,
+ unsigned int table_count)
+ {
+ TRACE_SERIALIZE (this);
+ assert (sfnt_tag != TTCTag);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ return_trace (u.fontFace.serialize (c, sfnt_tag, tags, blobs, table_count));
+ }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ if (unlikely (!u.tag.sanitize (c))) return_trace (false);
+ switch (u.tag) {
+ case CFFTag: /* All the non-collection tags */
+ case TrueTag:
+ case Typ1Tag:
+ case TrueTypeTag: return_trace (u.fontFace.sanitize (c));
+ case TTCTag: return_trace (u.ttcHeader.sanitize (c));
+// case DFontTag: return_trace (u.rfHeader.sanitize (c));
+ default: return_trace (true);
+ }
+ }
+
+ protected:
+ union {
+ Tag tag; /* 4-byte identifier. */
+ OpenTypeFontFace fontFace;
+ TTCHeader ttcHeader;
+ ResourceForkHeader rfHeader;
+ } u;
+ public:
+ DEFINE_SIZE_UNION (4, tag);
+};
+
+
+} /* namespace OT */
+
+
+#endif /* HB_OPEN_FILE_HH */