firmware/export/font.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (c) 2002 by Greg Haerr <greg@censoft.com>
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #ifndef _FONT_H
  22 #define _FONT_H
  23
  24 #include "inttypes.h"
  25
  26 /*
  27  * Incore font and image definitions
  28  */
  29 #include "config.h"
  30
  31 #if defined(HAVE_LCD_BITMAP) || (CONFIG_PLATFORM & PLATFORM_HOSTED)
  32 #ifndef __PCTOOL__
  33 #include "font_cache.h"
  34 #include "sysfont.h"
  35 #endif
  36
  37
  38 /*
  39  * Fonts are specified by number, and used for display
  40  * of menu information as well as mp3 filename data.
  41  * At system startup, up to MAXFONTS fonts are initialized,
  42  * either by being compiled-in, or loaded from disk.
  43  * If the font asked for does not exist, then the
  44  * system uses the next lower font number.  Font 0
  45  * must be available at system startup.
  46  * Fonts are specified in firmware/font.c.
  47  */
  48 enum {
  49     FONT_SYSFIXED, /* system fixed pitch font*/
  50     FONT_UI,       /* system porportional font*/
  51 #ifdef HAVE_REMOTE_LCD
  52     FONT_UI_REMOTE, /* UI font for remote LCD */
  53 #endif
  54     SYSTEMFONTCOUNT, /* Number of fonts reserved for the system and ui */
  55     FONT_FIRSTUSERFONT = 2
  56 };
  57 #define MAXUSERFONTS 8
  58
  59 /* SYSFONT, FONT_UI, FONT_UI_REMOTE + MAXUSERFONTS fonts in skins */
  60 #define MAXFONTS (SYSTEMFONTCOUNT + MAXUSERFONTS)
  61
  62 /*
  63  * .fnt loadable font file format definition
  64  *
  65  * format                     len  description
  66  * -------------------------  ---- ------------------------------
  67  * UCHAR version[4]              4   magic number and version bytes
  68  * USHORT maxwidth               2   font max width in pixels
  69  * USHORT height                 2   font height in pixels
  70  * USHORT ascent                 2   font ascent (baseline) in pixels
  71  * USHORT pad                    2   unused, pad to 32-bit boundary
  72  * ULONG firstchar               4   first character code in font
  73  * ULONG defaultchar             4   default character code in font
  74  * ULONG size                    4   # characters in font
  75  * ULONG nbits                   4   # bytes imagebits data in file
  76  * ULONG noffset                 4   # longs offset data in file
  77  * ULONG nwidth                  4   # bytes width data in file
  78  * MWIMAGEBITS bits          nbits   image bits variable data
  79  * [MWIMAGEBITS padded to 16-bit boundary]
  80  * USHORT offset         noffset*2   offset variable data
  81  * UCHAR width            nwidth*1   width variable data
  82  */
  83
  84 /* loadable font magic and version #*/
  85 #define VERSION "RB12"
  86
  87 /* builtin C-based proportional/fixed font structure */
  88 /* based on The Microwindows Project http://microwindows.org */
  89 struct font {
  90     int          maxwidth;        /* max width in pixels*/
  91     unsigned int height;          /* height in pixels*/
  92     int          ascent;          /* ascent (baseline) height*/
  93     int          firstchar;       /* first character in bitmap*/
  94     int          size;            /* font size in glyphs*/
  95     const unsigned char *bits;    /* 8-bit column bitmap data*/
  96     const void *offset;           /* offsets into bitmap data,
  97                                      uint16_t if bits_size < 0xFFDB else uint32_t*/
  98     const unsigned char *width;   /* character widths or NULL if fixed*/
  99     int          defaultchar;     /* default char (not glyph index)*/
 100     int32_t      bits_size;       /* # bytes of glyph bits*/
 101
 102     /* file, buffer and cache management */
 103     int          fd;              /* fd for the font file. >= 0 if cached */
 104     unsigned char *buffer_start;    /* buffer to store the font in */
 105     unsigned char *buffer_position; /* position in the buffer */
 106     unsigned char *buffer_end;      /* end of the buffer */
 107     int          buffer_size;       /* size of the buffer in bytes */
 108 #ifndef __PCTOOL__
 109     struct font_cache cache;
 110     uint32_t file_width_offset;    /* offset to file width data    */
 111     uint32_t file_offset_offset;   /* offset to file offset data   */
 112     int long_offset;
 113 #endif
 114
 115 };
 116
 117 /* font routines*/
 118 void font_init(void) INIT_ATTR;
 119 #ifdef HAVE_REMOTE_LCD
 120 /* Load a font into the special remote ui font slot */
 121 int font_load_remoteui(const char* path);
 122 #endif
 123 int font_load(struct font* pf, const char *path);
 124 void font_unload(int font_id);
 125
 126 struct font* font_get(int font);
 127
 128 void font_reset(struct font *pf);
 129 int font_getstringsize(const unsigned char *str, int *w, int *h, int fontnumber);
 130 int font_get_width(struct font* ft, unsigned short ch);
 131 const unsigned char * font_get_bits(struct font* ft, unsigned short ch);
 132 void glyph_cache_save(struct font* pf);
 133
 134 #else /* HAVE_LCD_BITMAP */
 135
 136 #define font_init()
 137 #define font_load(x)
 138
 139 #endif
 140
 141 #endif