awt/org/apache/harmony/awt/gl/CommonGraphics2DFactory.java

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
/**
 * @author Alexey A. Petrenko, Ilya S. Okomin
 * @version $Revision$
 */
package org.apache.harmony.awt.gl;

import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.peer.FontPeer;

import org.apache.harmony.awt.gl.font.FontMetricsImpl;
import org.apache.harmony.awt.wtk.GraphicsFactory;

/**
 * Common GraphicsFactory implementation
 *
 */
public abstract class CommonGraphics2DFactory implements GraphicsFactory {
    
    // static instance of CommonGraphics2DFactory
    public static CommonGraphics2DFactory inst;

    /**
     * Returns FontMetrics object that keeps metrics of the specified font.
     * 
     * @param font specified Font
     * @return FontMetrics object corresponding to the specified Font object
     */
    public FontMetrics getFontMetrics(Font font) {
        FontMetrics fm;
        for (FontMetrics element : cacheFM) {
            fm = element;
            if (fm == null){
                break;
            }

            if (fm.getFont().equals(font)){
                return fm;
            }
        }
        fm = new FontMetricsImpl(font);

        System.arraycopy(cacheFM, 0, cacheFM, 1, cacheFM.length -1);
        cacheFM[0] = fm;

        return fm;
    }
    // Font methods

    public FontPeer getFontPeer(Font font) {
        return getFontManager().getFontPeer(font.getName(), font.getStyle(), font.getSize());
    }
    
    /**
     * Embeds font from gile with specified path into the system. 
     * 
     * @param fontFilePath path to the font file 
     * @return Font object that was created from the file.
     */
    public abstract Font embedFont(String fontFilePath);

}