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) || defined(SIMULATOR)
  32 #ifndef __PCTOOL__
  33 #include "sysfont.h"
  34 #endif
  35
  36
  37 /*
  38  * Fonts are specified by number, and used for display
  39  * of menu information as well as mp3 filename data.
  40  * At system startup, up to MAXFONTS fonts are initialized,
  41  * either by being compiled-in, or loaded from disk.
  42  * If the font asked for does not exist, then the
  43  * system uses the next lower font number.  Font 0
  44  * must be available at system startup.
  45  * Fonts are specified in firmware/font.c.
  46  */
  47 enum {
  48     FONT_SYSFIXED, /* system fixed pitch font*/
  49     FONT_UI,       /* system porportional font*/
  50     MAXFONTS
  51 };
  52
  53 /*
  54  * .fnt loadable font file format definition
  55  *
  56  * format                     len  description
  57  * -------------------------  ---- ------------------------------
  58  * UCHAR version[4]              4   magic number and version bytes
  59  * USHORT maxwidth               2   font max width in pixels
  60  * USHORT height                 2   font height in pixels
  61  * USHORT ascent                 2   font ascent (baseline) in pixels
  62  * USHORT pad                    2   unused, pad to 32-bit boundary
  63  * ULONG firstchar               4   first character code in font
  64  * ULONG defaultchar             4   default character code in font
  65  * ULONG size                    4   # characters in font
  66  * ULONG nbits                   4   # bytes imagebits data in file
  67  * ULONG noffset                 4   # longs offset data in file
  68  * ULONG nwidth                  4   # bytes width data in file
  69  * MWIMAGEBITS bits          nbits   image bits variable data
  70  * [MWIMAGEBITS padded to 16-bit boundary]
  71  * USHORT offset         noffset*2   offset variable data
  72  * UCHAR width            nwidth*1   width variable data
  73  */
  74
  75 /* loadable font magic and version #*/
  76 #define VERSION "RB12"
  77
  78 /* builtin C-based proportional/fixed font structure */
  79 /* based on The Microwindows Project http://microwindows.org */
  80 struct font {
  81     int          maxwidth;        /* max width in pixels*/
  82     unsigned int height;          /* height in pixels*/
  83     int          ascent;          /* ascent (baseline) height*/
  84     int          firstchar;       /* first character in bitmap*/
  85     int          size;            /* font size in glyphs*/
  86     const unsigned char *bits;    /* 8-bit column bitmap data*/
  87     const void *offset;           /* offsets into bitmap data,
  88                                      uint16_t if bits_size < 0xFFDB else uint32_t*/
  89     const unsigned char *width;   /* character widths or NULL if fixed*/
  90     int          defaultchar;     /* default char (not glyph index)*/
  91     int32_t      bits_size;       /* # bytes of glyph bits*/
  92 };
  93
  94 /* font routines*/
  95 void font_init(void);
  96 struct font* font_load(const char *path);
  97 struct font* font_get(int font);
  98 void font_reset(void);
  99 int font_getstringsize(const unsigned char *str, int *w, int *h, int fontnumber);
 100 int font_get_width(struct font* ft, unsigned short ch);
 101 const unsigned char * font_get_bits(struct font* ft, unsigned short ch);
 102 void glyph_cache_save(void);
 103
 104 #else /* HAVE_LCD_BITMAP */
 105
 106 #define font_init()
 107 #define font_load(x)
 108
 109 #endif
 110
 111 #endif