/*
 * 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: ';' 区切りで複数指定可能 */
		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;
			/* 別の大きさを探す */
			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(...) {};
			}
			/* 見つからない */
			throw;
		}
	}

} /* namespace XKFont */