faaf431d32
%Fl now takes an optional 3rd param which is the number of glyphs to cache (default to 256). the smaller the number, the less ram will be used (i.e using 15 for a font which only shown numbers is a good idea) git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27882 a1c6a512-1295-4272-9138-f99709370657
142 lines
5.3 KiB
C
142 lines
5.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (c) 2002 by Greg Haerr <greg@censoft.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _FONT_H
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#define _FONT_H
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#include "inttypes.h"
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/*
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* Incore font and image definitions
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*/
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#include "config.h"
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#if defined(HAVE_LCD_BITMAP) || (CONFIG_PLATFORM & PLATFORM_HOSTED)
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#ifndef __PCTOOL__
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#include "font_cache.h"
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#include "sysfont.h"
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#endif
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/*
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* Fonts are specified by number, and used for display
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* of menu information as well as mp3 filename data.
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* At system startup, up to MAXFONTS fonts are initialized,
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* either by being compiled-in, or loaded from disk.
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* If the font asked for does not exist, then the
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* system uses the next lower font number. Font 0
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* must be available at system startup.
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* Fonts are specified in firmware/font.c.
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*/
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enum {
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FONT_SYSFIXED, /* system fixed pitch font*/
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FONT_UI, /* system porportional font*/
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#ifdef HAVE_REMOTE_LCD
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FONT_UI_REMOTE, /* UI font for remote LCD */
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#endif
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SYSTEMFONTCOUNT, /* Number of fonts reserved for the system and ui */
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FONT_FIRSTUSERFONT = 2
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};
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#define MAXUSERFONTS 8
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/* SYSFONT, FONT_UI, FONT_UI_REMOTE + MAXUSERFONTS fonts in skins */
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#define MAXFONTS (SYSTEMFONTCOUNT + MAXUSERFONTS)
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/*
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* .fnt loadable font file format definition
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*
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* format len description
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* ------------------------- ---- ------------------------------
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* UCHAR version[4] 4 magic number and version bytes
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* USHORT maxwidth 2 font max width in pixels
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* USHORT height 2 font height in pixels
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* USHORT ascent 2 font ascent (baseline) in pixels
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* USHORT pad 2 unused, pad to 32-bit boundary
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* ULONG firstchar 4 first character code in font
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* ULONG defaultchar 4 default character code in font
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* ULONG size 4 # characters in font
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* ULONG nbits 4 # bytes imagebits data in file
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* ULONG noffset 4 # longs offset data in file
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* ULONG nwidth 4 # bytes width data in file
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* MWIMAGEBITS bits nbits image bits variable data
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* [MWIMAGEBITS padded to 16-bit boundary]
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* USHORT offset noffset*2 offset variable data
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* UCHAR width nwidth*1 width variable data
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*/
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/* loadable font magic and version #*/
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#define VERSION "RB12"
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/* builtin C-based proportional/fixed font structure */
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/* based on The Microwindows Project http://microwindows.org */
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struct font {
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int maxwidth; /* max width in pixels*/
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unsigned int height; /* height in pixels*/
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int ascent; /* ascent (baseline) height*/
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int firstchar; /* first character in bitmap*/
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int size; /* font size in glyphs*/
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const unsigned char *bits; /* 8-bit column bitmap data*/
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const void *offset; /* offsets into bitmap data,
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uint16_t if bits_size < 0xFFDB else uint32_t*/
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const unsigned char *width; /* character widths or NULL if fixed*/
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int defaultchar; /* default char (not glyph index)*/
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int32_t bits_size; /* # bytes of glyph bits*/
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/* file, buffer and cache management */
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int fd; /* fd for the font file. >= 0 if cached */
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unsigned char *buffer_start; /* buffer to store the font in */
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unsigned char *buffer_position; /* position in the buffer */
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unsigned char *buffer_end; /* end of the buffer */
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int buffer_size; /* size of the buffer in bytes */
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#ifndef __PCTOOL__
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struct font_cache cache;
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uint32_t file_width_offset; /* offset to file width data */
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uint32_t file_offset_offset; /* offset to file offset data */
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int long_offset;
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#endif
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};
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/* font routines*/
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void font_init(void) INIT_ATTR;
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#ifdef HAVE_REMOTE_LCD
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/* Load a font into the special remote ui font slot */
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int font_load_remoteui(const char* path);
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#endif
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int font_load(struct font* pf, const char *path);
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int get_glyph_size(const char *path);
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void font_unload(int font_id);
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struct font* font_get(int font);
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void font_reset(struct font *pf);
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int font_getstringsize(const unsigned char *str, int *w, int *h, int fontnumber);
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int font_get_width(struct font* ft, unsigned short ch);
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const unsigned char * font_get_bits(struct font* ft, unsigned short ch);
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void glyph_cache_save(struct font* pf);
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#else /* HAVE_LCD_BITMAP */
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#define font_init()
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#define font_load(x)
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#endif
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#endif
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