mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-30 20:48:52 +00:00
304 lines
11 KiB
C
304 lines
11 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* (C) 1988, 1989 by Adobe Systems Incorporated. All rights reserved.
|
|
*
|
|
* This file may be freely copied and redistributed as long as:
|
|
* 1) This entire notice continues to be included in the file,
|
|
* 2) If the file has been modified in any way, a notice of such
|
|
* modification is conspicuously indicated.
|
|
*
|
|
* PostScript, Display PostScript, and Adobe are registered trademarks of
|
|
* Adobe Systems Incorporated.
|
|
*
|
|
* ************************************************************************
|
|
* THE INFORMATION BELOW IS FURNISHED AS IS, IS SUBJECT TO CHANGE WITHOUT
|
|
* NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ADOBE SYSTEMS
|
|
* INCORPORATED. ADOBE SYSTEMS INCORPORATED ASSUMES NO RESPONSIBILITY OR
|
|
* LIABILITY FOR ANY ERRORS OR INACCURACIES, MAKES NO WARRANTY OF ANY
|
|
* KIND (EXPRESS, IMPLIED OR STATUTORY) WITH RESPECT TO THIS INFORMATION,
|
|
* AND EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR PARTICULAR PURPOSES AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
|
|
* ************************************************************************
|
|
*/
|
|
|
|
/* ParseAFM.h
|
|
*
|
|
* This header file is used in conjuction with the parseAFM.c file.
|
|
* Together these files provide the functionality to parse Adobe Font
|
|
* Metrics files and store the information in predefined data structures.
|
|
* It is intended to work with an application program that needs font metric
|
|
* information. The program can be used as is by making a procedure call to
|
|
* parse an AFM file and have the data stored, or an application developer
|
|
* may wish to customize the code.
|
|
*
|
|
* This header file defines the data structures used as well as the key
|
|
* strings that are currently recognized by this version of the AFM parser.
|
|
* This program is based on the document "Adobe Font Metrics Files,
|
|
* Specification Version 2.0".
|
|
*
|
|
* AFM files are separated into distinct sections of different data. Because
|
|
* of this, the parseAFM program can parse a specified file to only save
|
|
* certain sections of information based on the application's needs. A record
|
|
* containing the requested information will be returned to the application.
|
|
*
|
|
* AFM files are divided into five sections of data:
|
|
* 1) The Global Font Information
|
|
* 2) The Character Metrics Information
|
|
* 3) The Track Kerning Data
|
|
* 4) The Pair-Wise Kerning Data
|
|
* 5) The Composite Character Data
|
|
*
|
|
* Basically, the application can request any of these sections independent
|
|
* of what other sections are requested. In addition, in recognizing that
|
|
* many applications will want ONLY the x-width of characters and not all
|
|
* of the other character metrics information, there is a way to receive
|
|
* only the width information so as not to pay the storage cost for the
|
|
* unwanted data. An application should never request both the
|
|
* "quick and dirty" char metrics (widths only) and the Character Metrics
|
|
* Information since the Character Metrics Information will contain all
|
|
* of the character widths as well.
|
|
*
|
|
* There is a procedure in parseAFM.c, called parseFile, that can be
|
|
* called from any application wishing to get information from the AFM File.
|
|
* This procedure expects 3 parameters: a vaild file descriptor, a pointer
|
|
* to a (FontInfo *) variable (for which space will be allocated and then
|
|
* will be filled in with the data requested), and a mask specifying
|
|
* which data from the AFM File should be saved in the FontInfo structure.
|
|
*
|
|
* The flags that can be used to set the appropriate mask are defined below.
|
|
* In addition, several commonly used masks have already been defined.
|
|
*
|
|
* History:
|
|
* original: DSM Thu Oct 20 17:39:59 PDT 1988
|
|
* modified: DSM Mon Jul 3 14:17:50 PDT 1989
|
|
* - added 'storageProblem' return code
|
|
* - fixed typos
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
/* your basic constants */
|
|
#ifndef TRUE
|
|
#define TRUE 1
|
|
#endif
|
|
#ifndef FALSE
|
|
#define FALSE 0
|
|
#endif
|
|
#define EOL '\n' /* end-of-line indicator */
|
|
#define MAX_NAME 4096 /* max length for identifiers */
|
|
#define BOOL int
|
|
#define FLAGS int
|
|
|
|
|
|
|
|
/* Flags that can be AND'ed together to specify exactly what
|
|
* information from the AFM file should be saved.
|
|
*/
|
|
#define P_G 0x01 /* 0000 0001 */ /* Global Font Info */
|
|
#define P_W 0x02 /* 0000 0010 */ /* Character Widths ONLY */
|
|
#define P_M 0x06 /* 0000 0110 */ /* All Char Metric Info */
|
|
#define P_P 0x08 /* 0000 1000 */ /* Pair Kerning Info */
|
|
#define P_T 0x10 /* 0001 0000 */ /* Track Kerning Info */
|
|
#define P_C 0x20 /* 0010 0000 */ /* Composite Char Info */
|
|
|
|
|
|
/* Commonly used flags
|
|
*/
|
|
#define P_GW (P_G | P_W)
|
|
#define P_GM (P_G | P_M)
|
|
#define P_GMP (P_G | P_M | P_P)
|
|
#define P_GMK (P_G | P_M | P_P | P_T)
|
|
#define P_ALL (P_G | P_M | P_P | P_T | P_C)
|
|
|
|
|
|
|
|
/* Possible return codes from the parseFile procedure.
|
|
*
|
|
* ok means there were no problems parsing the file.
|
|
*
|
|
* parseError means that there was some kind of parsing error, but the
|
|
* parser went on. This could include problems like the count for any given
|
|
* section does not add up to how many entries there actually were, or
|
|
* there was a key that was not recognized. The return record may contain
|
|
* vaild data or it may not.
|
|
*
|
|
* earlyEOF means that an End of File was encountered before expected. This
|
|
* may mean that the AFM file had been truncated, or improperly formed.
|
|
*
|
|
* storageProblem means that there were problems allocating storage for
|
|
* the data structures that would have contained the AFM data.
|
|
*/
|
|
#define ok 0
|
|
#define parseError -1
|
|
#define earlyEOF -2
|
|
#define storageProblem -3
|
|
|
|
|
|
|
|
/************************* TYPES *********************************/
|
|
/* Below are all of the data structure definitions. These structures
|
|
* try to map as closely as possible to grouping and naming of data
|
|
* in the AFM Files.
|
|
*/
|
|
|
|
|
|
/* Bounding box definition. Used for the Font BBox as well as the
|
|
* Character BBox.
|
|
*/
|
|
typedef struct
|
|
{
|
|
int llx; /* lower left x-position */
|
|
int lly; /* lower left y-position */
|
|
int urx; /* upper right x-position */
|
|
int ury; /* upper right y-position */
|
|
} BBox;
|
|
|
|
|
|
/* Global Font information.
|
|
* The key that each field is associated with is in comments. For an
|
|
* explanation about each key and its value please refer to the AFM
|
|
* documentation (full title & version given above).
|
|
*/
|
|
typedef struct
|
|
{
|
|
char *afmVersion; /* key: StartFontMetrics */
|
|
char *fontName; /* key: FontName */
|
|
char *fullName; /* key: FullName */
|
|
char *familyName; /* key: FamilyName */
|
|
char *weight; /* key: Weight */
|
|
float italicAngle; /* key: ItalicAngle */
|
|
BOOL isFixedPitch; /* key: IsFixedPitch */
|
|
BBox fontBBox; /* key: FontBBox */
|
|
int underlinePosition; /* key: UnderlinePosition */
|
|
int underlineThickness; /* key: UnderlineThickness */
|
|
char *version; /* key: Version */
|
|
char *notice; /* key: Notice */
|
|
char *encodingScheme; /* key: EncodingScheme */
|
|
int capHeight; /* key: CapHeight */
|
|
int xHeight; /* key: XHeight */
|
|
int ascender; /* key: Ascender */
|
|
int descender; /* key: Descender */
|
|
} GlobalFontInfo;
|
|
|
|
|
|
/* Ligature definition is a linked list since any character can have
|
|
* any number of ligatures.
|
|
*/
|
|
typedef struct _t_ligature
|
|
{
|
|
char *succ, *lig;
|
|
struct _t_ligature *next;
|
|
} Ligature;
|
|
|
|
|
|
/* Character Metric Information. This structure is used only if ALL
|
|
* character metric information is requested. If only the character
|
|
* widths is requested, then only an array of the character x-widths
|
|
* is returned.
|
|
*
|
|
* The key that each field is associated with is in comments. For an
|
|
* explanation about each key and its value please refer to the
|
|
* Character Metrics section of the AFM documentation (full title
|
|
* & version given above).
|
|
*/
|
|
typedef struct
|
|
{
|
|
int code, /* key: C */
|
|
wx, /* key: WX */
|
|
wy; /* together wx and wy are associated with key: W */
|
|
char *name; /* key: N */
|
|
BBox charBBox; /* key: B */
|
|
Ligature *ligs; /* key: L (linked list; not a fixed number of Ls */
|
|
} CharMetricInfo;
|
|
|
|
|
|
/* Track kerning data structure.
|
|
* The fields of this record are the five values associated with every
|
|
* TrackKern entry.
|
|
*
|
|
* For an explanation about each value please refer to the
|
|
* Track Kerning section of the AFM documentation (full title
|
|
* & version given above).
|
|
*/
|
|
typedef struct
|
|
{
|
|
int degree;
|
|
float minPtSize,
|
|
minKernAmt,
|
|
maxPtSize,
|
|
maxKernAmt;
|
|
} TrackKernData;
|
|
|
|
|
|
/* Pair Kerning data structure.
|
|
* The fields of this record are the four values associated with every
|
|
* KP entry. For KPX entries, the yamt will be zero.
|
|
*
|
|
* For an explanation about each value please refer to the
|
|
* Pair Kerning section of the AFM documentation (full title
|
|
* & version given above).
|
|
*/
|
|
typedef struct
|
|
{
|
|
char *name1;
|
|
char *name2;
|
|
int xamt,
|
|
yamt;
|
|
} PairKernData;
|
|
|
|
|
|
/* PCC is a piece of a composite character. This is a sub structure of a
|
|
* compCharData described below.
|
|
* These fields will be filled in with the values from the key PCC.
|
|
*
|
|
* For an explanation about each key and its value please refer to the
|
|
* Composite Character section of the AFM documentation (full title
|
|
* & version given above).
|
|
*/
|
|
typedef struct
|
|
{
|
|
char *pccName;
|
|
int deltax,
|
|
deltay;
|
|
} Pcc;
|
|
|
|
|
|
/* Composite Character Information data structure.
|
|
* The fields ccName and numOfPieces are filled with the values associated
|
|
* with the key CC. The field pieces points to an array (size = numOfPieces)
|
|
* of information about each of the parts of the composite character. That
|
|
* array is filled in with the values from the key PCC.
|
|
*
|
|
* For an explanation about each key and its value please refer to the
|
|
* Composite Character section of the AFM documentation (full title
|
|
* & version given above).
|
|
*/
|
|
typedef struct
|
|
{
|
|
char *ccName;
|
|
int numOfPieces;
|
|
Pcc *pieces;
|
|
} CompCharData;
|
|
|
|
|
|
/* FontInfo
|
|
* Record type containing pointers to all of the other data
|
|
* structures containing information about a font.
|
|
* A a record of this type is filled with data by the
|
|
* parseFile function.
|
|
*/
|
|
typedef struct
|
|
{
|
|
GlobalFontInfo *gfi; /* ptr to a GlobalFontInfo record */
|
|
int *cwi; /* ptr to 256 element array of just char widths */
|
|
int numOfChars; /* number of entries in char metrics array */
|
|
CharMetricInfo *cmi; /* ptr to char metrics array */
|
|
int numOfTracks; /* number to entries in track kerning array */
|
|
TrackKernData *tkd; /* ptr to track kerning array */
|
|
int numOfPairs; /* number to entries in pair kerning array */
|
|
PairKernData *pkd; /* ptr to pair kerning array */
|
|
int numOfComps; /* number to entries in comp char array */
|
|
CompCharData *ccd; /* ptr to comp char array */
|
|
} FontInfo;
|
|
|