101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
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/***************************************************************************
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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 Alex Gitelman
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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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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#ifdef SIMULATOR
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#include <fcntl.h>
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#endif
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#include <file.h>
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#include "ajf.h"
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#include <string.h>
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#include <errno.h>
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#include <stdbool.h>
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#include "debug.h"
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static unsigned char font_buf[MAX_FONT_BUFLEN];
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unsigned char* ajf_read_font(char* fname)
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{
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int count;
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#ifdef WIN32
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int fd = open(fname, O_RDONLY|O_BINARY);
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#else
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int fd = open(fname, O_RDONLY);
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#endif
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if (fd<0)
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{
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#ifdef SIMULATOR
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#ifdef WIN32
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DEBUGF("Failed opening font file: %d %s. ", _errno(), fname);
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#else
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DEBUGF("Failed opening font file: %d %s. ", errno, fname);
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#endif
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#endif
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return NULL;
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}
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count = read(fd, font_buf, MAX_FONT_BUFLEN);
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if (count==MAX_FONT_BUFLEN) {
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DEBUGF("Font is larger than allocated %d bytes!\n",MAX_FONT_BUFLEN);
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return NULL;
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}
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close(fd);
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if (font_buf[0]!=MAGIC1 || font_buf[1]!=MAGIC2) {
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DEBUGF("Bad magic word in font");
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return NULL;
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}
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return font_buf;
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}
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unsigned char* ajf_get_charbuf(unsigned char c, unsigned char* font,
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int *w, int *h)
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{
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int height = READ_SHORT(&font[HEIGHT_OFFSET]);
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int size = READ_SHORT(&font[SIZE_OFFSET]);
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int chars_offset = LOOKUP_MAP_OFFSET + size*3;
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int rows = (height-1)/8 + 1;
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int first_char = READ_SHORT(&font[FIRST_CHAR_OFFSET]);
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int map_idx = LOOKUP_MAP_OFFSET + (c-first_char)*3;
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int byte_count = font[map_idx];
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int char_idx;
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*h = height;
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*w = byte_count/rows;
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map_idx++;
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char_idx = READ_SHORT(&font[map_idx]);
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return &font[chars_offset + char_idx];
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}
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void ajf_get_charsize(unsigned char c, unsigned char* font,
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int *width, int *height)
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{
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int first_char = READ_SHORT(&font[FIRST_CHAR_OFFSET]);
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int map_idx = LOOKUP_MAP_OFFSET + (c-first_char)*3;
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int rows = 1;
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*height = READ_SHORT(&font[HEIGHT_OFFSET]);
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rows = (*height-1)/8 + 1;
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*width = font[map_idx]/rows;
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}
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int ajf_get_fontheight(unsigned char* font)
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{
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return READ_SHORT(&font[HEIGHT_OFFSET]);
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}
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