/** \file
* Internal bitmap font representation
*
*/
/*
* Copyright (C) 2009 Trammell Hudson <hudson+ml@osresearch.net>
*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef _font_h_
#define _font_h_
#include <stdint.h>
/** Raw in ROM representation of a Canon font.
*
* Stored in memory as;
* canon_font_t header
* uint32_t charmap[charmap_size/4]; (header + charmap_offset)
* uint32_t offsets[charmap_size/4]; (header + 2 * charmap_offset)
* canon_char_t chars[]; (header + 3 * charmap_offset)
*
* To find a character (slow way):
* Search charmap for matching value to find index
* Retrieve offset = offsets[index]
* Retrieve char at chars + index;
*
* Fast way for ASCII: index == c - 0x20;
*
*/
typedef struct
{
uint32_t magic;
uint16_t off_0x4; // 0xffe2 in most of them?
uint16_t height; // in pixels, off_0x8;
uint32_t charmap_offset; // off_0x8, typicaly 0x24
uint32_t charmap_size; // off_0xc
uint32_t bitmap_size; //
const char name[16];
} __attribute__((packed))
canon_font_t;
#define CANON_FONT_MAGIC ((uint32_t) 0x544e46) // "FNT\0"
/** Raw in ROM representation of a Canon font bitmap */
typedef struct
{
uint16_t width; // bitmap width in bits (round up to nearest byte)
uint16_t height; // bitmap height in rows
uint16_t display_width; // display width
uint16_t xoff; // x offset
uint16_t yoff; // y offset
uint8_t bitmap[]; // ((w + 7) & ~7) * h bytes long
} __attribute__((packed))
canon_char_t;
/** Four fonts in the ROM1.bin file */
extern const canon_font_t font_gothic_24;
extern const canon_font_t font_gothic_30;
extern const canon_font_t font_gothic_36;
extern const canon_font_t font_mono_24;
extern const canon_font_t font_small;
extern const canon_font_t font_med;
extern void
canon_font_puts(
const canon_font_t * font,
unsigned * x,
unsigned * y,
const char * s
);
#endif