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[dfont] Some renaming, plus add link to reference doc

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This commit is contained in:
Behdad Esfahbod 2018-09-11 18:12:26 +02:00
parent 4134ec1307
commit bd75fd45cd
1 changed files with 35 additions and 44 deletions
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79
src/hb-open-file.hh
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@ -287,9 +287,11 @@ struct TTCHeader
/*
* Mac Resource Fork
*
* http://mirror.informatimago.com/next/developer.apple.com/documentation/mac/MoreToolbox/MoreToolbox-99.html
*/
struct ResourceRefItem
struct ResourceRecord
{
inline bool sanitize (hb_sanitize_context_t *c) const
{
@ -298,10 +300,10 @@ struct ResourceRefItem
return_trace (likely (c->check_struct (this)));
}
HBINT16 id; /* Resource ID, is really should be signed? */
HBUINT16 id; /* Resource ID, is really should be signed? */
HBINT16 nameOffset; /* Offset from beginning of resource name list
* to resource name, -1 means there is none. */
HBUINT8 attr; /* Resource attributes */
HBUINT8 attrs; /* Resource attributes */
HBUINT24 dataOffset; /* Offset from beginning of resource data to
* data for this resource */
HBUINT32 reserved; /* Reserved for handle to resource */
@ -309,7 +311,7 @@ struct ResourceRefItem
DEFINE_SIZE_STATIC (12);
};
struct ResourceTypeItem
struct ResourceTypeRecord
{
inline bool sanitize (hb_sanitize_context_t *c) const
{
@ -318,20 +320,20 @@ struct ResourceTypeItem
return_trace (likely (c->check_struct (this)));
}
inline unsigned int get_resource_count () const { return numRes + 1; }
inline unsigned int get_resource_count () const { return resCountM1 + 1; }
inline bool is_sfnt () const { return type == HB_TAG ('s','f','n','t'); }
inline bool is_sfnt () const { return tag == HB_TAG ('s','f','n','t'); }
inline const ResourceRefItem& get_ref_item (const void *base,
unsigned int i) const
inline const ResourceRecord& get_resource_record (const void *base,
unsigned int i) const
{
return (base+refList)[i];
}
protected:
Tag type; /* Resource type. */
HBUINT16 numRes; /* Number of resources minus 1. */
OffsetTo<UnsizedArrayOf<ResourceRefItem> >
Tag tag; /* Resource type. */
HBUINT16 resCountM1; /* Number of resources minus 1. */
OffsetTo<UnsizedArrayOf<ResourceRecord> >
refList; /* Offset from beginning of resource type list
* to reference item list for this type. */
public:
@ -347,51 +349,41 @@ struct ResourceMap
return_trace (false);
for (unsigned int i = 0; i < get_types_count (); ++i)
{
const ResourceTypeItem& type = get_type (i);
const ResourceTypeRecord& type = get_type_record (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)))
if (unlikely (!get_resource_record (type, j).sanitize (c)))
return_trace (false);
}
return_trace (true);
}
inline const ResourceTypeItem& get_type (unsigned int i) const
inline const ResourceTypeRecord& get_type_record (unsigned int i) const
{
// Why offset from the second byte of the object? I'm not sure
return ((&reserved[2])+typeList)[i];
// Why offset from the third byte of the object? I'm not sure
return (((const char *) this + 2)+typeListZ)[i];
}
inline unsigned int get_types_count () const { return nTypes + 1; }
inline unsigned int get_types_count () const { return typeCountM1 + 1; }
inline const ResourceRefItem &get_ref_item (const ResourceTypeItem &type,
unsigned int i) const
inline const ResourceRecord &get_resource_record (const ResourceTypeRecord &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 < 0)
return Null (PString);
return StructAtOffset<PString> (this, nameList + item.nameOffset);
return type.get_resource_record (&(this+typeListZ), i);
}
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
HBUINT8 reserved0[16]; /* Reserved for copy of resource header */
HBUINT32 reserved1; /* Reserved for handle to next resource map */
HBUINT16 resreved2; /* Reserved for file reference number */
HBUINT16 attrs; /* Resource fork attribute */
OffsetTo<UnsizedArrayOf<ResourceTypeRecord> >
typeListZ; /* Offset from beginning of map to
* resource type list */
Offset16 nameList; /* Offset from beginning of map to
* resource name list */
HBUINT16 nTypes; /* Number of types in the map minus 1 */
HBUINT16 typeCountM1; /* Number of types in the map minus 1 */
public:
DEFINE_SIZE_STATIC (30);
};
@ -403,19 +395,18 @@ struct ResourceForkHeader
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);
const ResourceTypeRecord& type = resource_map.get_type_record (i);
if (type.is_sfnt ())
return type.get_resource_count ();
}
return 0;
}
inline const LArrayOf<HBUINT8>& get_data (const ResourceTypeItem& type,
inline const LArrayOf<HBUINT8>& get_data (const ResourceTypeRecord& type,
unsigned int idx) const
{
const ResourceMap &resource_map = this+map;
unsigned int offset = dataOffset;
offset += resource_map.get_ref_item (type, idx).dataOffset;
unsigned int offset = dataOffset + resource_map.get_resource_record (type, idx).dataOffset;
return StructAtOffset<LArrayOf<HBUINT8> > (this, offset);
}
@ -424,7 +415,7 @@ struct ResourceForkHeader
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);
const ResourceTypeRecord& type = resource_map.get_type_record (i);
if (type.is_sfnt () && idx < type.get_resource_count ())
{
const OpenTypeFontFace &face = (OpenTypeFontFace&) get_data (type, idx).arrayZ;
@ -448,7 +439,7 @@ struct ResourceForkHeader
for (unsigned int i = 0; i < resource_map.get_types_count (); ++i)
{
const ResourceTypeItem& type = resource_map.get_type (i);
const ResourceTypeRecord& type = resource_map.get_type_record (i);
for (unsigned int j = 0; j < type.get_resource_count (); ++j)
{
const LArrayOf<HBUINT8>& data = get_data (type, j);
@ -465,7 +456,7 @@ struct ResourceForkHeader
}
protected:
HBUINT32 dataOffset; /* Offset from beginning of resource fork
Offset32 dataOffset; /* Offset from beginning of resource fork
* to resource data */
LOffsetTo<ResourceMap>
map; /* Offset from beginning of resource fork