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+/* modified for MDVI -- some names changed to avoid conflicts with T1lib */
+/*
+ * (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
+ */
+#ifndef _MDVI_PARSEAFM_H
+#define _MDVI_PARSEAFM_H 1
+
+#include "sysdeps.h"
+
+#include <stdio.h>
+
+/* your basic constants */
+#define TRUE 1
+#define FALSE 0
+#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;
+
+/************************* PROCEDURES ****************************/
+
+/* Call this procedure to do the grunt work of parsing an AFM file.
+ *
+ * "fp" should be a valid file pointer to an AFM file.
+ *
+ * "fi" is a pointer to a pointer to a FontInfo record sturcture
+ * (defined above). Storage for the FontInfo structure will be
+ * allocated in parseFile and the structure will be filled in
+ * with the requested data from the AFM File.
+ *
+ * "flags" is a mask with bits set representing what data should
+ * be saved. Defined above are valid flags that can be used to set
+ * the mask, as well as a few commonly used masks.
+ *
+ * The possible return codes from parseFile are defined above.
+ */
+
+extern int afm_parse_file __PROTO((FILE *, FontInfo **, FLAGS));
+extern void afm_free_fontinfo __PROTO((FontInfo *));
+
+#endif /* _MDVI_PARSEAFM_H */