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#ifndef LIBFBF_H
#define LIBFBF_Hx
typedef struct {
unsigned int magic;
unsigned int version;
unsigned int nb_glyphs;
unsigned int compressed_segment_size;
unsigned int flags;
unsigned short max_width;
unsigned short max_height;
unsigned short x_res;
unsigned short y_res;
unsigned short pt_size;
unsigned short ascent;
unsigned short descent;
unsigned short line_height;
short underline_position;
unsigned short underline_thickness;
unsigned short nb_segments;
unsigned char family_type;
unsigned char dummy; /* align */
} UnifontHeader;
#define UNIFONT_MAGIC (('U' << 24) | ('N' << 16) | ('F' << 8) | ('T'))
/* interval compression model parameters */
#define NB_CTX ((1 << 12) * 3 * 3)
#define NB_CTX1 (1 << 10)
#define MAXDIST 4
#define MAXWIDTH 128
#define MAXHEIGHT 128
#define MAXWRAP ((MAXWIDTH+7)/8)
#define WRAP (MAXWIDTH + 2 * MAXDIST)
/* arith coder parameters */
#define RANGE_MIN (1 << 10)
/* flags */
#define UF_FLAG_HANGUL 0x0001 /* use ad hoc hangul compression */
/* family type */
#define UF_FAMILY_FIXED 0
#define UF_FAMILY_SERIF 1
#define UF_FAMILY_SANS 2
#define JOHAB_BASE 0x20000
/* segment cache */
typedef struct {
short w, h;
short x, y, xincr;
unsigned char *bitmap;
} GlyphEntry;
struct UniFontData;
typedef struct UniFontData UniFontData;
#define CSEG_CACHE_SIZE 8
typedef struct SegData {
unsigned int start;
unsigned short glyph;
unsigned short size;
} SegData;
struct UniFontData {
struct UniFontData *next_font; /* can be used by the user to link
to next font */
int nb_glyphs; /* real number of glyphs */
int nb_glyphs_total; /* total number, including algorithmically
generated ones */
unsigned int flags;
int compressed_segment_size;
int max_width, max_height; /* maximum dimensions of bitmaps */
int x_res, y_res, pt_size;
int ascent, descent, line_height;
int underline_position; /* in 64th pixel */
int underline_thickness; /* in 64th pixel */
char family_name[64];
int family_type;
/* compressed segments offsets */
int nb_csegs;
int *csegs_offsets;
int *msegs_offsets;
/* compressed segment cache */
struct GlyphSegment *cseg_cache[CSEG_CACHE_SIZE];
/* segments */
/* XXX: allocation */
int nb_segs;
SegData *seg_table;
/* memory functions */
void *mem_opaque;
void *(*fbf_malloc)(void *mem_opaque, int size);
void (*fbf_free)(void *mem_opaque, void *ptr);
/* file input handlings */
void *infile;
int (*fbf_seek)(void *infile, long pos);
int (*fbf_read)(void *infile, unsigned char *buf, int len);
int (*fbf_getc)(void *infile);
/* bit buffer handling */
int bitbuf;
int bitcnt;
unsigned char ctx1[NB_CTX1];
/* arithmetic decoder */
unsigned int alow, arange, adata;
/* temporary bitmap for composite glyph decoding */
unsigned char tmp_buffer[MAXWRAP * MAXHEIGHT];
GlyphEntry tmp_glyph_entry;
};
typedef struct GlyphSegment {
int first_glyph;
int nb_glyphs;
int use_count;
unsigned char *bitmap_table;
GlyphEntry metrics[1];
} GlyphSegment;
int fbf_load_font(UniFontData *uf);
void fbf_free_font(UniFontData *uf);
int fbf_unicode_to_glyph(UniFontData *uf, int code);
int fbf_decode_glyph(UniFontData *uf,
GlyphEntry **glyph_entry_ptr,
int index);
#endif
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