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