summaryrefslogtreecommitdiffstats
path: root/firmware/export/font.h
blob: da8c85155c653c143d82b00c4c9aa6da4a69eae0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (c) 2002 by Greg Haerr <greg@censoft.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#ifndef _FONT_H
#define _FONT_H

#include <stdlib.h>
#include "inttypes.h"
#include "stdbool.h"

/*
 * Incore font and image definitions
 */
#include "config.h"

#if defined(HAVE_LCD_BITMAP) || (CONFIG_PLATFORM & PLATFORM_HOSTED)
#ifndef __PCTOOL__
#include "font_cache.h"
#include "sysfont.h"
#endif


/*
 * Fonts are specified by number, and used for display
 * of menu information as well as mp3 filename data.
 * At system startup, up to MAXFONTS fonts are initialized,
 * either by being compiled-in, or loaded from disk.
 * If the font asked for does not exist, then the
 * system uses the next lower font number.  Font 0
 * must be available at system startup.
 * Fonts are specified in firmware/font.c.
 */
enum {
    FONT_SYSFIXED = -1, /* system fixed pitch font*/
    FONT_FIRSTUSERFONT = 0, /* first id for the user fonts */
};
#define MAXUSERFONTS 8

/* SYSFONT, FONT_UI, FONT_UI_REMOTE + MAXUSERFONTS fonts in skins */
#define MAXFONTS (FONT_FIRSTUSERFONT + MAXUSERFONTS)
#define FONT_UI MAXFONTS

/*
 * .fnt loadable font file format definition
 *
 * format                     len  description
 * -------------------------  ---- ------------------------------
 * UCHAR version[4]              4   magic number and version bytes
 * USHORT maxwidth               2   font max width in pixels
 * USHORT height                 2   font height in pixels
 * USHORT ascent                 2   font ascent (baseline) in pixels
 * USHORT depth                  2   depth of the font, 0=1bit and 1=4bit
 * ULONG firstchar               4   first character code in font
 * ULONG defaultchar             4   default character code in font
 * ULONG size                    4   # characters in font
 * ULONG nbits                   4   # bytes imagebits data in file
 * ULONG noffset                 4   # longs offset data in file
 * ULONG nwidth                  4   # bytes width data in file
 * MWIMAGEBITS bits          nbits   image bits variable data
 * [MWIMAGEBITS padded to 16-bit boundary]
 * USHORT offset         noffset*2   offset variable data
 * UCHAR width            nwidth*1   width variable data
 */

/* loadable font magic and version #*/
#define VERSION "RB12"

/* builtin C-based proportional/fixed font structure */
/* based on The Microwindows Project http://microwindows.org */
struct font {
    int          maxwidth;        /* max width in pixels*/
    unsigned int height;          /* height in pixels*/
    int          ascent;          /* ascent (baseline) height*/
    int          firstchar;       /* first character in bitmap*/
    int          size;            /* font size in glyphs*/
    int          depth;           /* depth of the font, 0=1bit and 1=4bit */
    const unsigned char *bits;    /* 8-bit column bitmap data*/
    const void *offset;           /* offsets into bitmap data,
                                     uint16_t if bits_size < 0xFFDB else uint32_t*/
    const unsigned char *width;   /* character widths or NULL if fixed*/
    int          defaultchar;     /* default char (not glyph index)*/
    int32_t      bits_size;       /* # bytes of glyph bits*/
    
    /* file, buffer and cache management */
    int          fd;              /* fd for the font file. >= 0 if cached */
    unsigned char *buffer_start;    /* buffer to store the font in */       
    unsigned char *buffer_position; /* position in the buffer */    
    unsigned char *buffer_end;      /* end of the buffer */
    size_t         buffer_size;     /* size of the buffer in bytes */
#ifndef __PCTOOL__    
    struct font_cache cache;
    uint32_t file_width_offset;    /* offset to file width data    */
    uint32_t file_offset_offset;   /* offset to file offset data   */
    int long_offset;
#endif    
    
};

/* font routines*/
void font_init(void) INIT_ATTR;
const char* font_filename(int font_id);
int font_load(const char *path);
int font_load_ex(const char *path, size_t buffer_size);
int font_glyphs_to_bufsize(const char *path, int glyphs);
void font_unload(int font_id);

struct font* font_get(int font);

int font_getstringsize(const unsigned char *str, int *w, int *h, int fontnumber);
int font_get_width(struct font* ft, unsigned short ch);
const unsigned char * font_get_bits(struct font* ft, unsigned short ch);
void glyph_cache_save(int font_id);

#else /* HAVE_LCD_BITMAP */

#define font_init()
#define font_load(x)

#endif

#endif