After DEFINE_SCRIPT_ARRAY
This commit is contained in:
Behdad Esfahbod
parent
01e4fcb032
commit
b6e62bc5db
|
|
@ -1,6 +1,96 @@
|
|||
#include <stdint.h>
|
||||
#include <assert.h>
|
||||
#include <glib.h>
|
||||
|
||||
|
||||
|
||||
/* Macros to convert to/from BigEndian */
|
||||
#define hb_be_uint8_t
|
||||
#define hb_be_int8_t
|
||||
#define hb_be_uint16_t GUINT16_TO_BE
|
||||
#define hb_be_int16_t GINT16_TO_BE
|
||||
#define hb_be_uint32_t GUINT32_TO_BE
|
||||
#define hb_be_int32_t GINT32_TO_BE
|
||||
#define hb_be_uint64_t GUINT64_TO_BE
|
||||
#define hb_be_int64_t GINT64_TO_BE
|
||||
|
||||
/*
|
||||
* Int types
|
||||
*/
|
||||
|
||||
#define DEFINE_INT_TYPE1(NAME, TYPE, BIG_ENDIAN) \
|
||||
struct NAME { \
|
||||
inline NAME (TYPE i) { v = BIG_ENDIAN(i); } \
|
||||
inline NAME& operator = (TYPE i) { v = BIG_ENDIAN(i); return *this; } \
|
||||
inline operator TYPE(void) const { return BIG_ENDIAN(v); } \
|
||||
inline bool operator== (NAME o) const { return v == o.v; } \
|
||||
private: TYPE v; \
|
||||
}
|
||||
#define DEFINE_INT_TYPE0(NAME, type) DEFINE_INT_TYPE1 (NAME, type, hb_be_##type)
|
||||
#define DEFINE_INT_TYPE(NAME, u, w) DEFINE_INT_TYPE0 (NAME, u##int##w##_t)
|
||||
|
||||
|
||||
/*
|
||||
* Array types
|
||||
*/
|
||||
|
||||
/* get_len() is a method returning the number of items in an array-like object */
|
||||
#define DEFINE_LEN(Type, array, num) \
|
||||
inline unsigned int get_len(void) const { return num; } \
|
||||
|
||||
/* get_size() is a method returning the size in bytes of an array-like object */
|
||||
#define DEFINE_SIZE(Type, array, num) \
|
||||
inline unsigned int get_size(void) const { return sizeof (*this) + sizeof (Type) * num; }
|
||||
|
||||
#define DEFINE_LEN_AND_SIZE(Type, array, num) \
|
||||
DEFINE_LEN(Type, array, num) \
|
||||
DEFINE_SIZE(Type, array, num)
|
||||
|
||||
/* An array type is one that contains a variable number of objects
|
||||
* as its last item. An array object is extended with len() and size()
|
||||
* methods, as well as overloaded [] operator. */
|
||||
#define DEFINE_ARRAY_TYPE(Type, array, num) \
|
||||
DEFINE_INDEX_OPERATOR(const, Type, array, num) \
|
||||
DEFINE_INDEX_OPERATOR( , Type, array, num) \
|
||||
DEFINE_LEN_AND_SIZE(Type, array, num)
|
||||
#define DEFINE_INDEX_OPERATOR(const, Type, array, num) \
|
||||
inline const Type& operator[] (unsigned int i) const { \
|
||||
assert (i < num); \
|
||||
return array[i]; \
|
||||
}
|
||||
|
||||
/* An offset array type is like an array type, but it contains a table
|
||||
* of offsets to the objects, relative to the beginning of the current
|
||||
* object. */
|
||||
#define DEFINE_OFFSET_ARRAY_TYPE(Type, array, num) \
|
||||
DEFINE_OFFSET_INDEX_OPERATOR(const, Type, array, num) \
|
||||
DEFINE_OFFSET_INDEX_OPERATOR( , Type, array, num) \
|
||||
DEFINE_LEN_AND_SIZE(Offset, array, num)
|
||||
#define DEFINE_OFFSET_INDEX_OPERATOR(const, Type, array, num) \
|
||||
inline const Type& operator[] (unsigned int i) const { \
|
||||
assert (i < num); \
|
||||
assert (array[i]); \
|
||||
return *(const Type *)((const char*)this + array[i]); \
|
||||
}
|
||||
|
||||
#define DEFINE_RECORD_ARRAY_TYPE(Type, array, num) \
|
||||
DEFINE_RECORD_ACCESSOR(const, Type, array, num) \
|
||||
DEFINE_RECORD_ACCESSOR( , Type, array, num) \
|
||||
DEFINE_LEN_AND_SIZE(Record, array, num)
|
||||
#define DEFINE_RECORD_ACCESSOR(const, Type, array, num) \
|
||||
inline const Type& operator[] (unsigned int i) const { \
|
||||
assert (i < num); \
|
||||
assert (array[i].offset); \
|
||||
return *(const Type *)((const char*)this + array[i].offset); \
|
||||
} \
|
||||
inline const Tag& get_tag (unsigned int i) const { \
|
||||
assert (i < num); \
|
||||
return array[i].tag; \
|
||||
} \
|
||||
/* TODO: implement find_tag() */
|
||||
|
||||
|
||||
|
||||
/*
|
||||
*
|
||||
* The OpenType Font File
|
||||
|
|
@ -18,26 +108,6 @@
|
|||
* All OpenType fonts use Motorola-style byte ordering (Big Endian):" */
|
||||
|
||||
|
||||
/* Macros to convert to/from BigEndian */
|
||||
#define hb_be_uint8_t
|
||||
#define hb_be_int8_t
|
||||
#define hb_be_uint16_t GUINT16_TO_BE
|
||||
#define hb_be_int16_t GINT16_TO_BE
|
||||
#define hb_be_uint32_t GUINT32_TO_BE
|
||||
#define hb_be_int32_t GINT32_TO_BE
|
||||
#define hb_be_uint64_t GUINT64_TO_BE
|
||||
#define hb_be_int64_t GINT64_TO_BE
|
||||
|
||||
#define DEFINE_INT_TYPE1(NAME, TYPE, BIG_ENDIAN) \
|
||||
struct NAME { \
|
||||
inline NAME (TYPE i) { v = BIG_ENDIAN(i); } \
|
||||
inline TYPE operator = (TYPE i) { v = BIG_ENDIAN(i); return i; } \
|
||||
inline operator TYPE(void) { return BIG_ENDIAN(v); } \
|
||||
private: TYPE v; \
|
||||
}
|
||||
#define DEFINE_INT_TYPE0(NAME, type) DEFINE_INT_TYPE1 (NAME, type, hb_be_##type)
|
||||
#define DEFINE_INT_TYPE(NAME, u, w) DEFINE_INT_TYPE0 (NAME, u##int##w##_t)
|
||||
|
||||
DEFINE_INT_TYPE (BYTE, u, 8); /* 8-bit unsigned integer. */
|
||||
DEFINE_INT_TYPE (CHAR, , 8); /* 8-bit signed integer. */
|
||||
DEFINE_INT_TYPE (USHORT, u, 16); /* 16-bit unsigned integer. */
|
||||
|
|
@ -51,9 +121,9 @@ DEFINE_INT_TYPE (LONGDATETIME, , 64);
|
|||
|
||||
/* 32-bit signed fixed-point number (16.16) */
|
||||
struct Fixed : LONG {
|
||||
inline operator double(void) { return (uint32_t) this / 65536.; }
|
||||
inline int16_t int_part (void) { return (uint32_t) this >> 16; }
|
||||
inline int16_t frac_part (void) { return (uint32_t) this & 0xffff; }
|
||||
inline operator double(void) const { return (uint32_t) this / 65536.; }
|
||||
inline int16_t int_part (void) const { return (uint32_t) this >> 16; }
|
||||
inline int16_t frac_part (void) const { return (uint32_t) this & 0xffff; }
|
||||
};
|
||||
|
||||
/* Smallest measurable distance in the em space. */
|
||||
|
|
@ -69,13 +139,16 @@ struct UFWORD : USHORT {
|
|||
|
||||
/* 16-bit signed fixed number with the low 14 bits of fraction (2.14). */
|
||||
struct F2DOT14 : SHORT {
|
||||
inline operator double() { return (uint32_t) this / 16384.; }
|
||||
inline operator double() const { return (uint32_t) this / 16384.; }
|
||||
};
|
||||
|
||||
/* Array of four uint8s (length = 32 bits) used to identify a script, language
|
||||
* system, feature, or baseline */
|
||||
struct Tag : public ULONG {
|
||||
inline Tag (char *c) : ULONG(c ? *(uint32_t*)c : 0) {}
|
||||
struct Tag {
|
||||
inline Tag (void) { v[0] = v[1] = v[2] = v[3] = 0; }
|
||||
inline Tag (char *c) { v[0] = c[0]; v[1] = c[1]; v[2] = c[2]; v[3] = c[3]; }
|
||||
inline operator uint32_t(void) const { return (v[0]<<24)+(v[1]<<16) +(v[2]<<8)+v[3]; } \
|
||||
private: char v[4];
|
||||
};
|
||||
|
||||
/* Glyph index number, same as uint16 (length = 16 bits) */
|
||||
|
|
@ -99,38 +172,23 @@ struct CheckSum : ULONG {
|
|||
};
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* Version Numbers
|
||||
*/
|
||||
|
||||
|
||||
struct USHORT_Version : USHORT {
|
||||
};
|
||||
|
||||
struct Fixed_Version : Fixed {
|
||||
inline int16_t major (void) { return this->int_part(); }
|
||||
inline int16_t minor (void) { return this->frac_part(); }
|
||||
inline int16_t major (void) const { return this->int_part(); }
|
||||
inline int16_t minor (void) const { return this->frac_part(); }
|
||||
};
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* Organization of an OpenType Font
|
||||
*/
|
||||
|
||||
|
||||
/* Offset Table */
|
||||
struct OffsetTable {
|
||||
Fixed_Version sfnt_version; /* 0x00010000 for version 1.0. */
|
||||
USHORT numTables; /* Number of tables. */
|
||||
USHORT searchRange; /* (Maximum power of 2 <= numTables) x 16 */
|
||||
USHORT entrySelector; /* Log2(maximum power of 2 <= numTables). */
|
||||
USHORT rangeShift; /* NumTables x 16-searchRange. */
|
||||
};
|
||||
|
||||
|
||||
/* Table Directory */
|
||||
struct TableDirectory {
|
||||
Tag tag; /* 4-byte identifier. */
|
||||
CheckSum checkSum; /* CheckSum for this table. */
|
||||
|
|
@ -139,41 +197,38 @@ struct TableDirectory {
|
|||
ULONG length; /* Length of this table. */
|
||||
};
|
||||
|
||||
struct OffsetTable {
|
||||
DEFINE_ARRAY_TYPE (TableDirectory, tableDir, numTables);
|
||||
|
||||
Tag sfnt_version; /* '\0\001\0\00' if TrueType / 'OTTO' if CFF */
|
||||
USHORT numTables; /* Number of tables. */
|
||||
USHORT searchRange; /* (Maximum power of 2 <= numTables) x 16 */
|
||||
USHORT entrySelector; /* Log2(maximum power of 2 <= numTables). */
|
||||
USHORT rangeShift; /* NumTables x 16-searchRange. */
|
||||
TableDirectory tableDir[]; /* TableDirectory entries. numTables items */
|
||||
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
* TrueType Collections
|
||||
*/
|
||||
|
||||
|
||||
/* TTC Header Version 1.0 */
|
||||
struct TTCHeader {
|
||||
/* This works as an array type because TTCHeader is always located at the
|
||||
* beginning of the file */
|
||||
DEFINE_OFFSET_ARRAY_TYPE (OffsetTable, offsetTable, numFonts);
|
||||
|
||||
Tag TTCTag; /* TrueType Collection ID string: 'ttcf' */
|
||||
ULONG version; /* Version of the TTC Header (1.0 or 2.0),
|
||||
* 0x00010000 or 0x00020000 */
|
||||
ULONG numFonts; /* Number of fonts in TTC */
|
||||
ULONG offsetTable[0]; /* Array of offsets to the OffsetTable for each font
|
||||
ULONG offsetTable[]; /* Array of offsets to the OffsetTable for each font
|
||||
* from the beginning of the file.
|
||||
* numFonts entries long. */
|
||||
|
||||
inline int len(void) { return sizeof (TTCHeader)
|
||||
+ sizeof (ULONG) * numFonts; }
|
||||
};
|
||||
|
||||
|
||||
/* TTC Header Version 2.0 tail
|
||||
* Follows after TTCHeader with appropriate size for the offsetTable. */
|
||||
struct TTCHeaderVersion2Tail {
|
||||
ULONG ulDsigTag; /* Tag indicating that a DSIG table exists,
|
||||
* 0x44534947 ('DSIG') (null if no signature) */
|
||||
ULONG ulDsigLength; /* The length (in bytes) of the DSIG table (null if
|
||||
* no signature) */
|
||||
ULONG ulDsigOffset; /* The offset (in bytes) of the DSIG table from the
|
||||
* beginning of the TTC file (null if no signature) */
|
||||
};
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
|
@ -183,30 +238,40 @@ struct TTCHeaderVersion2Tail {
|
|||
*
|
||||
*/
|
||||
|
||||
struct Script;
|
||||
struct LangSys;
|
||||
|
||||
/*
|
||||
* Script List Table and Script Record
|
||||
*/
|
||||
|
||||
struct ScriptRecord {
|
||||
Tag scriptTag; /* 4-byte ScriptTag identifier */
|
||||
Offset scriptOffset; /* Offset to Script table--from beginning of
|
||||
* ScriptList */
|
||||
};
|
||||
typedef struct Record {
|
||||
Tag tag; /* 4-byte Tag identifier */
|
||||
Offset offset; /* Offset from beginning of object holding
|
||||
* the Record */
|
||||
} ScriptRecord, LangSysRecord, FeatureRecord;
|
||||
|
||||
struct Script;
|
||||
|
||||
struct ScriptList {
|
||||
DEFINE_RECORD_ARRAY_TYPE (Script, scriptRecord, scriptCount);
|
||||
|
||||
USHORT scriptCount; /* Number of ScriptRecords */
|
||||
ScriptRecord scriptRecord[]; /* Array of ScriptRecords--listed alphabetically
|
||||
* by ScriptTag. scriptCount entries long */
|
||||
|
||||
inline int len(void) { return sizeof (ScriptList)
|
||||
+ sizeof (ScriptRecord) * scriptCount; }
|
||||
};
|
||||
|
||||
struct Script {
|
||||
DEFINE_RECORD_ARRAY_TYPE (LangSys, langSysRecord, langSysCount);
|
||||
|
||||
Offset defaultLangSys; /* Offset to DefaultLangSys table--from
|
||||
* beginning of Script table--may be NULL */
|
||||
USHORT langSysCount; /* Number of LangSysRecords for this script--
|
||||
* excluding the DefaultLangSys */
|
||||
LangSysRecord langSysRecord[];/* Array of LangSysRecords--listed
|
||||
* alphabetically by LangSysTag */
|
||||
};
|
||||
|
||||
struct LangSys {
|
||||
|
||||
|
||||
};
|
||||
|
||||
|
||||
#include <stdio.h>
|
||||
|
|
@ -214,10 +279,10 @@ struct ScriptList {
|
|||
int
|
||||
main (void)
|
||||
{
|
||||
Tag y("abcd");
|
||||
Tag &x = y;
|
||||
BYTE b(0);
|
||||
// Tag y("abcd");
|
||||
// Tag &x = y;
|
||||
// BYTE b(0);
|
||||
|
||||
printf ("%d %04x %04x\n", sizeof (x), x+0, y+0);
|
||||
printf ("%d\n", sizeof (ScriptList));//, x+0, y+0);
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue