mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-04 02:57:38 +00:00
128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef WOFF_PRIVATE_H_
|
|
#define WOFF_PRIVATE_H_
|
|
|
|
#include "woff.h"
|
|
|
|
/* private definitions used in the WOFF encoder/decoder functions */
|
|
|
|
/* create an OT tag from 4 characters */
|
|
#define TAG(a,b,c,d) ((a)<<24 | (b)<<16 | (c)<<8 | (d))
|
|
|
|
#define WOFF_SIGNATURE TAG('w','O','F','F')
|
|
|
|
#define SFNT_VERSION_CFF TAG('O','T','T','O')
|
|
#define SFNT_VERSION_TT 0x00010000
|
|
#define SFNT_VERSION_true TAG('t','r','u','e')
|
|
|
|
#define TABLE_TAG_DSIG TAG('D','S','I','G')
|
|
#define TABLE_TAG_head TAG('h','e','a','d')
|
|
#define TABLE_TAG_bhed TAG('b','h','e','d')
|
|
|
|
#define SFNT_CHECKSUM_CALC_CONST 0xB1B0AFBAU /* from the TT/OT spec */
|
|
|
|
#ifdef WOFF_MOZILLA_CLIENT/* Copies of the NS_SWAP16 and NS_SWAP32 macros; they are defined in
|
|
a C++ header in mozilla, so we cannot include that here */
|
|
# include "prtypes.h" /* defines IS_LITTLE_ENDIAN / IS_BIG_ENDIAN */
|
|
# if defined IS_LITTLE_ENDIAN
|
|
# define READ16BE(x) ((((x) & 0xff) << 8) | (((x) >> 8) & 0xff))
|
|
# define READ32BE(x) ((READ16BE((x) & 0xffff) << 16) | (READ16BE((x) >> 16)))
|
|
# elif defined IS_BIG_ENDIAN
|
|
# define READ16BE(x) (x)
|
|
# define READ32BE(x) (x)
|
|
# else
|
|
# error "Unknown byte order"
|
|
# endif
|
|
#else
|
|
/* These macros to read values as big-endian only work on "real" variables,
|
|
not general expressions, because of the use of &(x), but they are
|
|
designed to work on both BE and LE machines without the need for a
|
|
configure check. For production code, we might want to replace this
|
|
with something more efficient. */
|
|
/* read a 32-bit BigEndian value */
|
|
# define READ32BE(x) ( ( (uint32_t) ((uint8_t*)&(x))[0] << 24 ) + \
|
|
( (uint32_t) ((uint8_t*)&(x))[1] << 16 ) + \
|
|
( (uint32_t) ((uint8_t*)&(x))[2] << 8 ) + \
|
|
(uint32_t) ((uint8_t*)&(x))[3] )
|
|
/* read a 16-bit BigEndian value */
|
|
# define READ16BE(x) ( ( (uint16_t) ((uint8_t*)&(x))[0] << 8 ) + \
|
|
(uint16_t) ((uint8_t*)&(x))[1] )
|
|
#endif
|
|
|
|
#pragma pack(push,1)
|
|
|
|
typedef struct {
|
|
uint32_t version;
|
|
uint16_t numTables;
|
|
uint16_t searchRange;
|
|
uint16_t entrySelector;
|
|
uint16_t rangeShift;
|
|
} sfntHeader;
|
|
|
|
typedef struct {
|
|
uint32_t tag;
|
|
uint32_t checksum;
|
|
uint32_t offset;
|
|
uint32_t length;
|
|
} sfntDirEntry;
|
|
|
|
typedef struct {
|
|
uint32_t signature;
|
|
uint32_t flavor;
|
|
uint32_t length;
|
|
uint16_t numTables;
|
|
uint16_t reserved;
|
|
uint32_t totalSfntSize;
|
|
uint16_t majorVersion;
|
|
uint16_t minorVersion;
|
|
uint32_t metaOffset;
|
|
uint32_t metaCompLen;
|
|
uint32_t metaOrigLen;
|
|
uint32_t privOffset;
|
|
uint32_t privLen;
|
|
} woffHeader;
|
|
|
|
typedef struct {
|
|
uint32_t tag;
|
|
uint32_t offset;
|
|
uint32_t compLen;
|
|
uint32_t origLen;
|
|
uint32_t checksum;
|
|
} woffDirEntry;
|
|
|
|
typedef struct {
|
|
uint32_t version;
|
|
uint32_t fontRevision;
|
|
uint32_t checkSumAdjustment;
|
|
uint32_t magicNumber;
|
|
uint16_t flags;
|
|
uint16_t unitsPerEm;
|
|
uint32_t created[2];
|
|
uint32_t modified[2];
|
|
int16_t xMin;
|
|
int16_t yMin;
|
|
int16_t xMax;
|
|
int16_t yMax;
|
|
uint16_t macStyle;
|
|
uint16_t lowestRecPpem;
|
|
int16_t fontDirectionHint;
|
|
int16_t indexToLocFormat;
|
|
int16_t glyphDataFormat;
|
|
} sfntHeadTable;
|
|
|
|
#define HEAD_TABLE_SIZE 54 /* sizeof(sfntHeadTable) may report 56 because of alignment */
|
|
|
|
typedef struct {
|
|
uint32_t offset;
|
|
uint16_t oldIndex;
|
|
uint16_t newIndex;
|
|
} tableOrderRec;
|
|
|
|
#pragma pack(pop)
|
|
|
|
#endif
|