Support dfont font files (#949)
diff --git a/src/hb-open-file-private.hh b/src/hb-open-file-private.hh
index 2965b46..f69d5f4 100644
--- a/src/hb-open-file-private.hh
+++ b/src/hb-open-file-private.hh
@@ -286,6 +286,197 @@
} 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
@@ -299,6 +490,7 @@
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 */
};
@@ -313,6 +505,7 @@
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;
}
}
@@ -327,6 +520,7 @@
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);
}
}
@@ -353,6 +547,7 @@
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);
}
}
@@ -362,6 +557,7 @@
Tag tag; /* 4-byte identifier. */
OpenTypeFontFace fontFace;
TTCHeader ttcHeader;
+ ResourceForkHeader rfHeader;
} u;
public:
DEFINE_SIZE_UNION (4, tag);
diff --git a/src/hb-open-type-private.hh b/src/hb-open-type-private.hh
index 8180287..9a4835b 100644
--- a/src/hb-open-type-private.hh
+++ b/src/hb-open-type-private.hh
@@ -1033,6 +1033,7 @@
DEFINE_SIZE_ARRAY (sizeof (LenType), arrayZ);
};
template <typename Type> struct LArrayOf : ArrayOf<Type, HBUINT32> {};
+typedef ArrayOf<HBUINT8, HBUINT8> PString;
/* Array of Offset's */
template <typename Type, typename OffsetType=HBUINT16>
diff --git a/src/main.cc b/src/main.cc
index ca0fcc5..873d240 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -78,6 +78,9 @@
case OpenTypeFontFile::Typ1Tag:
printf ("Obsolete Apple Type1 font in SFNT container\n");
break;
+ case OpenTypeFontFile::DFontTag:
+ printf ("DFont Mac Resource Fork\n");
+ break;
default:
printf ("Unknown font format\n");
break;
