toni@1144: /**
toni@1302:  * Back 2 Browser Bytecode Translator
toni@1302:  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
toni@1144:  *
toni@1302:  * This program is free software: you can redistribute it and/or modify
toni@1302:  * it under the terms of the GNU General Public License as published by
toni@1302:  * the Free Software Foundation, version 2 of the License.
toni@1144:  *
toni@1302:  * This program is distributed in the hope that it will be useful,
toni@1302:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
toni@1302:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
toni@1302:  * GNU General Public License for more details.
toni@1144:  *
toni@1302:  * You should have received a copy of the GNU General Public License
toni@1302:  * along with this program. Look for COPYING file in the top folder.
toni@1302:  * If not, see http://opensource.org/licenses/GPL-2.0.
toni@1144:  */
toni@1144: package net.java.html.canvas;
toni@1144: 
toni@1144: import java.util.Objects;
toni@1263: import java.util.ServiceLoader;
toni@1263: import net.java.html.canvas.spi.GraphicsEnvironment;
toni@1144: 
toni@1144: /**
toni@1154:  * Image represents an Image Resource defined by a path.
toni@1144:  *
toni@1144:  * @author antonepple
toni@1144:  */
toni@1304: public final class Image {
toni@1144: 
toni@1144:     private String src;
toni@1308:     private int cacheHash;
toni@1144:     private Object cached;
toni@1144: 
toni@1263:     public static Image create(String src) {
toni@1263:         return new Image(src);
toni@1263:     }
toni@1263: 
toni@1263:     private Image(String src) {
toni@1144:         this.src = src;
toni@1144:     }
toni@1144: 
toni@1144:     void cache(Object toCache) {
toni@1263:         this.cached = toCache;
toni@1144:         cacheHash = hashCode();
toni@1144:     }
toni@1144: 
toni@1144:     private boolean isCached() {
toni@1144:         return cacheHash == hashCode();
toni@1144:     }
toni@1144: 
toni@1144:     Object getCached() {
toni@1144:         return isCached() ? cached : null;
toni@1144:     }
toni@1144: 
toni@1144:     public String getSrc() {
toni@1144:         return src;
toni@1144:     }
toni@1144: 
toni@1263:     public int getWidth() {
toni@1263:         ServiceLoader<GraphicsEnvironment> loader = ServiceLoader.load(GraphicsEnvironment.class);
toni@1263:         GraphicsEnvironment ge = null;
toni@1263:         for (GraphicsEnvironment graphicsEnvironment : loader) {
toni@1263:             ge = graphicsEnvironment;
toni@1263:             break;
toni@1263:         }
toni@1263:         return ge.getWidth(this, cached);
toni@1263:     }
toni@1263: 
toni@1304:     
toni@1263:     public int getHeight() {
toni@1263:         ServiceLoader<GraphicsEnvironment> loader = ServiceLoader.load(GraphicsEnvironment.class);
toni@1263:         GraphicsEnvironment ge = null;
toni@1263:         for (GraphicsEnvironment graphicsEnvironment : loader) {
toni@1263:             ge = graphicsEnvironment;
toni@1263:             break;
toni@1263:         }
toni@1263:         return ge.getHeight(this, cached);
toni@1263:     }
toni@1263: 
toni@1144:     @Override
toni@1144:     public int hashCode() {
toni@1144:         int hash = 7;
toni@1263:         hash = 59 * hash + Objects.hashCode(this.src) ^ (cached == null ? 1231 : 1237);
toni@1144:         return hash;
toni@1144:     }
toni@1144: 
toni@1144:     @Override
toni@1144:     public boolean equals(Object obj) {
toni@1144:         if (obj == null) {
toni@1144:             return false;
toni@1144:         }
toni@1144:         if (getClass() != obj.getClass()) {
toni@1144:             return false;
toni@1144:         }
toni@1144:         final Image other = (Image) obj;
toni@1144:         if (!Objects.equals(this.src, other.src)) {
toni@1144:             return false;
toni@1144:         }
toni@1263:         if ((cached == null) != (other.getCached() == null)) {
toni@1153:             return false;
toni@1153:         }
toni@1144:         return true;
toni@1144:     }
toni@1144: }