From 93b231c69366563ba441dc4907bfb036fe3b4c55 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Thu, 12 Sep 2002 13:33:59 +0000
Subject: Greg Haerr's new loadable font. No more #ifdef font-style, removed
 old propfont and loadable font code. New font file format.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2269 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/font.h | 126 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 firmware/font.h

(limited to 'firmware/font.h')

diff --git a/firmware/font.h b/firmware/font.h
new file mode 100644
index 0000000000..13d60e560b
--- /dev/null
+++ b/firmware/font.h
@@ -0,0 +1,126 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (c) 2002 by Greg Haerr <greg@censoft.com>
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+/*
+ * Incore font and image definitions
+ */
+#include "config.h"
+
+#if defined(HAVE_LCD_BITMAP) || defined(SIMULATOR)
+
+/* max static loadable fonts buffer*/
+#ifndef MAX_FONT_SIZE
+#define MAX_FONT_SIZE	9000	/* max total fontsize allocation*/
+#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.
+ */
+#define FONT_SYSFIXED	0	/* system fixed pitch font*/
+#define FONT_UI		1	/* system porportional font*/
+#define FONT_MP3	2	/* font used for mp3 info*/
+#define MAXFONTS	3	/* max # fonts*/
+
+/*
+ * .fnt (.rbf) loadable font file format definition
+ *
+ * format		      len	description
+ * -------------------------  ----	------------------------------
+ * UCHAR version[4]		4	magic number and version bytes
+ * UCHAR name[64]	       64	font name, space padded
+ * UCHAR copyright[256]	      256	copyright info, space padded
+ * USHORT maxwidth		2	font max width in pixels
+ * USHORT height		2	font height in pixels
+ * USHORT ascent		2	font ascent (baseline) in pixels
+ * 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	# words imagebits data in file
+ * ULONG noffset		4	# longs offset data in file
+ * ULONG nwidth			4	# bytes width data in file
+ * MWIMAGEBITS bits	  nbits*2	image bits variable data
+ * ULONG offset         noffset*4	offset variable data
+ * UCHAR width		 nwidth*1	width variable data
+ */
+
+/* loadable font magic and version #*/
+#define VERSION		"RB10"
+
+/* MWIMAGEBITS helper macros*/
+#define MWIMAGE_WORDS(x)	(((x)+15)/16)	/* image size in words*/
+#define MWIMAGE_BYTES(x)	(((x)+7)/8)	/* image size in bytes*/
+#define	MWIMAGE_BITSPERIMAGE	(sizeof(MWIMAGEBITS) * 8)
+#define	MWIMAGE_BITVALUE(n)	((MWIMAGEBITS) (((MWIMAGEBITS) 1) << (n)))
+#define	MWIMAGE_FIRSTBIT	(MWIMAGE_BITVALUE(MWIMAGE_BITSPERIMAGE - 1))
+#define	MWIMAGE_TESTBIT(m)	((m) & MWIMAGE_FIRSTBIT)
+#define	MWIMAGE_SHIFTBIT(m)	((MWIMAGEBITS) ((m) << 1))
+
+typedef unsigned short	MWIMAGEBITS;	/* bitmap image unit size*/
+
+/* builtin C-based proportional/fixed font structure */
+/* based on The Microwindows Project http://microwindows.org */
+typedef struct {
+    char *	name;		/* font name*/
+    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*/
+    MWIMAGEBITS *bits;		/* 16-bit right-padded bitmap data*/
+    unsigned long *offset;	/* offsets into bitmap data*/
+    unsigned char *width;	/* character widths or NULL if fixed*/
+    int		defaultchar;	/* default char (not glyph index)*/
+    long	bits_size;	/* # words of MWIMAGEBITS bits*/
+#if 0
+    char *	facename;	/* facename of font*/
+    char *	copyright;	/* copyright info for loadable fonts*/
+#endif
+} MWCFONT, *PMWCFONT;
+
+/* structure for rockbox startup font selection*/
+struct corefont {
+    PMWCFONT pf;		/* compiled-in or loaded font*/
+    char *diskname;		/* diskname if not compiled-in*/
+};
+
+extern struct corefont sysfonts[MAXFONTS];
+
+/* font routines*/
+PMWCFONT getfont(int font);
+PMWCFONT rbf_load_font(char *path, PMWCFONT pf);
+
+void font_init(void);
+
+#else /* HAVE_LCD_BITMAP */
+
+#define font_init()
+
+#endif
+
+/* -----------------------------------------------------------------
+ * local variables:
+ * eval: (load-file "rockbox-mode.el")
+ * end:
+ */
-- 
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