toni@1119: /**
toni@1119:  * Back 2 Browser Bytecode Translator Copyright (C) 2012 Jaroslav Tulach
toni@1119:  * <jaroslav.tulach@apidesign.org>
toni@1119:  *
toni@1119:  * This program is free software: you can redistribute it and/or modify it under
toni@1119:  * the terms of the GNU General Public License as published by the Free Software
toni@1119:  * Foundation, version 2 of the License.
toni@1119:  *
toni@1119:  * This program is distributed in the hope that it will be useful, but WITHOUT
toni@1119:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
toni@1119:  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
toni@1119:  * details.
toni@1119:  *
toni@1119:  * You should have received a copy of the GNU General Public License along with
toni@1119:  * this program. Look for COPYING file in the top folder. If not, see
toni@1119:  * http://opensource.org/licenses/GPL-2.0.
toni@1118:  */
toni@1118: package net.java.html.canvas;
toni@1118: 
toni@1118: import java.util.ServiceLoader;
toni@1118: 
toni@1118: /**
toni@1118:  *
toni@1118:  * @author antonepple
toni@1118:  */
toni@1118: public abstract class GraphicsEnvironment {
toni@1118: 
toni@1118:     private static GraphicsEnvironment DEFAULT;
toni@1118: 
toni@1118:     public GraphicsEnvironment getDefault() {
toni@1118:         if (DEFAULT == null) {
toni@1118:             ServiceLoader<GraphicsEnvironment> loader = ServiceLoader.load(GraphicsEnvironment.class);
toni@1118:             DEFAULT = loader.iterator().next();
toni@1118:         }
toni@1118:         return DEFAULT == null ? getDummyInstance() : DEFAULT;
toni@1118:     }
toni@1118: 
toni@1118:     public abstract Image getImageForPath(String path);
toni@1118:     
toni@1118:     public abstract LinearGradient createLinearGradient();
toni@1118:     
toni@1118:     public abstract Pattern createPattern();
toni@1118:     
toni@1118:     public abstract RadialGradient createRadialGradient();
toni@1118:     
toni@1118:     public abstract TextMetrics createTextMetrics();
toni@1118:     
toni@1118:     private GraphicsEnvironment getDummyInstance() {
toni@1118:         
toni@1118:         return new GraphicsEnvironment() {
toni@1118: 
toni@1118:             @Override
toni@1118:             public Image getImageForPath(String path) {
toni@1118:                return new Image() {
toni@1118: 
toni@1118:                    @Override
toni@1118:                    public int getHeight() {
toni@1118:                      return 0;
toni@1118:                    }
toni@1118: 
toni@1118:                    @Override
toni@1118:                    public int getWidth() {
toni@1118:                        return 0;
toni@1118:                    }
toni@1118:                };
toni@1118:             }
toni@1118: 
toni@1118:             @Override
toni@1118:             public LinearGradient createLinearGradient() {
toni@1118:                 return new LinearGradient() {
toni@1118: 
toni@1118:                     @Override
toni@1118:                     public void addColorStop(double position, String color) {
toni@1118:                       
toni@1118:                     }
toni@1118:                 };
toni@1118:             }
toni@1118: 
toni@1118:             @Override
toni@1118:             public Pattern createPattern() {
toni@1118:                return new Pattern() {
toni@1118: };
toni@1118:             }
toni@1118: 
toni@1118:             @Override
toni@1118:             public RadialGradient createRadialGradient() {
toni@1118:                 return new RadialGradient() {
toni@1118: 
toni@1118:                     @Override
toni@1118:                     public void addColorStop(double position, String color) {
toni@1118:                         
toni@1118:                     }
toni@1118:                 };
toni@1118:             }
toni@1118: 
toni@1118:             @Override
toni@1118:             public TextMetrics createTextMetrics() {
toni@1118:                 return new TextMetrics() {
toni@1118: 
toni@1118:                     @Override
toni@1118:                     public double getHeight() {
toni@1118:                         return 0;
toni@1118:                     }
toni@1118: 
toni@1118:                     @Override
toni@1118:                     public double getWidth() {
toni@1118:                         return 0;
toni@1118:                     }
toni@1118:                 };
toni@1118:             }
toni@1118:         };
toni@1118:     }
toni@1118:     
toni@1118:     
toni@1118: }