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/* psf.h */
/*
* Format of a psf font file:
*
* 1. The header
* 2. The font
* 3. Unicode information
*/
/*
* Format of the Unicode information:
*
* For each font position <uc>*<seq>*<term>
* where <uc> is a 2-byte little endian Unicode value,
* <seq> = <ss><uc><uc>*, <ss> = psf1 ? 0xFFFE : 0xFE,
* <term> = psf1 ? 0xFFFF : 0xFF.
* and * denotes zero or more occurrences of the preceding item.
*
* Semantics:
* The leading <uc>* part gives Unicode symbols that are all
* represented by this font position. The following sequences
* are sequences of Unicode symbols - probably a symbol
* together with combining accents - also represented by
* this font position.
*
* Example:
* At the font position for a capital A-ring glyph, we
* may have:
* 00C5,212B,FFFE,0041,030A,FFFF
* Some font positions may be described by sequences only,
* namely when there is no precomposed Unicode value for the glyph.
*/
#ifndef _PSF_H
#define _PSF_H
#define PSF1_MAGIC0 0x36
#define PSF1_MAGIC1 0x04
#define PSF1_MODE512 0x01
#define PSF1_MODEHASTAB 0x02
#define PSF1_MODEHASSEQ 0x04
#define PSF1_MAXMODE 0x05
#define PSF1_SEPARATOR 0xFFFF
#define PSF1_STARTSEQ 0xFFFE
struct psf1_header {
unsigned char magic[2]; /* Magic number */
unsigned char mode; /* PSF font mode */
unsigned char charsize; /* Character size */
};
/*
* Format and semantics of psf2 version 0 are as psf (with PSF_MAXMODE == 5).
* However, this allows one to specify the length.
* It turns out to be very useful to be able to work with fonts
* with a few symbols or even only one (like the Euro), and
* with very large fonts (like several thousand Unicode symbols
* done in the same style).
* Following hpa's suggestion, psf2 uses UTF-8 rather than UCS-2,
* and has 32-bit magic 0x864ab572.
* The integers here are little endian 4-byte integers.
*/
#define PSF2_MAGIC0 0x72
#define PSF2_MAGIC1 0xb5
#define PSF2_MAGIC2 0x4a
#define PSF2_MAGIC3 0x86
struct psf2_header {
unsigned char magic[4];
unsigned int version;
unsigned int headersize; /* offset of bitmaps in file */
unsigned int flags;
unsigned int length; /* number of glyphs */
unsigned int charsize; /* number of bytes for each character */
unsigned int height, width; /* max dimensions of glyphs */
/* charsize = height * ((width + 7) / 8) */
};
/* bits used in flags */
#define PSF2_HAS_UNICODE_TABLE 0x01
/* max version recognized so far */
#define PSF2_MAXVERSION 0
/* UTF8 separators */
#define PSF2_SEPARATOR 0xFF
#define PSF2_STARTSEQ 0xFE
#define PSF1_MAGIC_OK(x) ((x)[0] == PSF1_MAGIC0 && (x)[1] == PSF1_MAGIC1)
#define PSF2_MAGIC_OK(x) ((x)[0] == PSF2_MAGIC0 && (x)[1] == PSF2_MAGIC1 && (x)[2] == PSF2_MAGIC2 && (x)[3] == PSF2_MAGIC3)
#endif /* _PSF_H */