/*
	This file is part of the OdinMS Maple Story Server
    Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
		       Matthias Butz <matze@odinms.de>
		       Jan Christian Meyer <vimes@odinms.de>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as
    published by the Free Software Foundation version 3 as published by
    the Free Software Foundation. You may not use, modify or distribute
    this program under any other version of the GNU Affero General Public
    License.

    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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package provider.wz;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import provider.MapleCanvas;

public class FileStoredPngMapleCanvas implements MapleCanvas {
    private File file;
    private int width;
    private int height;
    private BufferedImage image;

    public FileStoredPngMapleCanvas(int width, int height, File fileIn) {
        this.width = width;
        this.height = height;
        this.file = fileIn;
    }

    @Override
    public int getHeight() {
        return height;
    }

    @Override
    public int getWidth() {
        return width;
    }

    @Override
    public BufferedImage getImage() {
        loadImageIfNecessary();
        return image;
    }

    private void loadImageIfNecessary() {
        if (image == null) {
            try {
                image = ImageIO.read(file);
                // replace the dimensions loaded from the wz by the REAL dimensions from the image - should be equal tho
                width = image.getWidth();
                height = image.getHeight();
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
    }
}
