root/font/font_peer_fn.cc

/*
 * Copyright (c) 2001 Yuki Sawada
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This code uses some parts of AVG32 for Macintosh by Kenjo.
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdexcept>
#include <string>

using namespace std;

#include "codeconv.h"
#include "font.h"
#include "font_peer.h"

namespace XKFont {

#define FN_DAT_SIZE  2544768

PeerFn::PeerFn(const char *name, int index, int hsize, int vsize) : buffer(0)
{
        FILE *fp = 0;

        buffer = new unsigned char[FN_DAT_SIZE];
        fp = fopen(name, "rb");
        if (!fp) {
                delete[] buffer;
                buffer = 0;
                string err = string("XKFont::PeerFn::PeerFn : Cannot open font file ")+name;
                throw std::invalid_argument(err);
        }
        fread(buffer, 1, FN_DAT_SIZE, fp);
        fclose(fp);

        return;
}


PeerFn::~PeerFn() {
        delete[] buffer;
}

bool
PeerFn::GlyphCreate(unsigned int code, Glyph* glyph)
{
        unsigned char *p1, *p2;
        unsigned int h, l, offset;
        int x, y;

        l = codeconv_euc_to_jis(code);
        l -= 0x2121;
        h = l >> 8;
        l &= 0xff;
        offset = (h * 0x5e + l) * 12 * 24;
        if (offset > FN_DAT_SIZE - 12 * 24)
                 offset = 0;

        glyph->bitmap_left = 0;
        glyph->bitmap_top = 21;
        glyph->bitmap.width = 24;
        glyph->bitmap.rows = 24;

#if 0
        glyph->metrics.ascender = private->vsize - 4;
        glyph->metrics.descender = -4;
#endif
        glyph->advance.x = 24 + 1;
        glyph->advance.y = 24 + 1;

        glyph->bitmap.buffer = new unsigned char[24*24];

        p1 = glyph->bitmap.buffer;
        p2 = buffer + offset;
        for (y = 0; y < 24; y++) {
                for (x = 0; x < 12; x++) {
                        unsigned char c = ~*p2++;
                        unsigned char c1;
                        c1 = (c)   & 0x0f;
                        *p1++ = (c1<<4) | c1;
                        c1 = (c>>4)& 0x0f;
                        *p1++ = (c1<<4) | c1;
                }
        }
        return true;
}

} /* end of namespace XKFont */