root/font/font_face.cc

/*
 * Copyright (c) 2000, 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.
 */

#include <stdlib.h>
#include <stdio.h>
#include "font.h"
#include "font_peer.h"
#include <map>
#include <string>
#include <iostream>

namespace XKFont {

        class Cache : public std::map<unsigned int, Glyph*> {
                public:
                        Cache() {}
                        ~Cache() {
                                iterator it;
                                for (it = begin(); it != end(); it++)
                                        delete (it->second);
                        }
        };

        Face::Face(const char *name_orig, int index, int hsize, int vsize)
        {
                cache = new Cache;

                /* name: ';' 区切りで耇数指定可胜 */
                char* name = new char[strlen(name_orig)+1];
                while(*name_orig != 0) {
                        const char* next_name = strchr(name_orig, ';');
                        if (next_name) {
                                strncpy(name, name_orig, next_name - name_orig);
                                name[next_name-name_orig] = 0;
                                name_orig = next_name + 1;
                        } else {
                                strcpy(name, name_orig);
                                name_orig += strlen(name_orig);
                        }
                        if (strstr(name, "fn.dat")) {
                                peer.push_back(new PeerFn(name, index, hsize, vsize));
                        } else if (strstr(name, ".ttf") || strstr(name, ".ttc")) {
                                peer.push_back(new PeerFt2(name, index, hsize, vsize));
#if USE_X11
                        } else {
                                peer.push_back(new PeerX11(name, index, hsize, vsize));
#endif
                        }
                }
                delete[] name;
                return;
        }

        Face::~Face() {
                delete cache;
        }

        Glyph* Face::GlyphLoad(unsigned int code) {
                if (cache->count(code))
                        return (*cache)[code];

                Glyph* g = new Glyph;
                iterator it;
                for (it=peer.begin(); it != peer.end(); it++) {
                        if ( (*it)->GlyphCreate(code, g)) break;
                }
                if (it == peer.end()) {
                        fprintf(stderr,"Cannot find glyph, code %04x\n",code);
                        g->bitmap_left = 0;
                        g->bitmap_top = 0;
                        g->bitmap.width = 0;
                        g->bitmap.rows = 0;
                        g->bitmap.buffer = new unsigned char[1];
                        g->bitmap.buffer[0] = 0;
                        g->advance.x = 0;
                        g->advance.y = 0;
                }
                (*cache)[code] = g;
                return g;
        }

        class FontImpl {
                public:
                        std::map<int, Face*> cache;
                        std::string fontname;
                        int size;
                        ~FontImpl();
        };

        FontImpl::~FontImpl() {
                std::map<int,Face*>::iterator it;
                for (it=cache.begin(); it!=cache.end(); it++) delete it->second;
        }

        Font::Font(const char* name, int size) {
                pimpl = new FontImpl;
                pimpl->fontname = name;
                pimpl->size = size;
                vsize = size;
        };

        Font::~Font() {
                delete pimpl;
        }

        Face* Font::FaceLoad(double scale) {
                std::map<int, Face*>& cache = pimpl->cache;
                int size = int(scale * pimpl->size);
                if (cache.find(size) != cache.end()) return cache[size];
                try {
                        Face* face = new Face(pimpl->fontname.c_str(), 0, size, size);
                        cache[size] = face;
                        return face;
                } catch(...) {
                        std::cerr << "Cannot create font face; font "<<pimpl->fontname<<", size "<<size<<std::endl;
                        /* 別の倧きさを探す */
                        int i;
                        for (i=0; i<size; i++) {
                                if (cache.find(size-i) != cache.end()) return cache[size-i];
                                if (cache.find(size+i) != cache.end()) return cache[size+i];
                                try {
                                        Face* face = new Face(pimpl->fontname.c_str(), 0, size-i, size-i);
                                        cache[size-i] = face;
                                        return face;
                                } catch(...) {};
                                try {
                                        Face* face = new Face(pimpl->fontname.c_str(), 0, size+i, size+i);
                                        cache[size+i] = face;
                                        return face;
                                } catch(...) {};
                        }
                        /* 芋぀からない */
                        throw;
                }
        }

} /* namespace XKFont */