/**

  * Back 2 Browser Bytecode Translator Copyright (C) 2012 Jaroslav Tulach

  * <jaroslav.tulach@apidesign.org>

  *

  * This program is free software: you can redistribute it and/or modify it under

  * the terms of the GNU General Public License as published by the Free Software

  * Foundation, version 2 of the 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 General Public License for more

  * details.

  *

  * You should have received a copy of the GNU General Public License along with

  * this program. Look for COPYING file in the top folder. If not, see

  * http://opensource.org/licenses/GPL-2.0.

  */

 package net.java.html.canvas;

 import java.util.ServiceLoader;

 /**

  *

  * @author antonepple

  */

 public abstract class GraphicsEnvironment {

     private static GraphicsEnvironment DEFAULT;

     public GraphicsEnvironment getDefault() {

         if (DEFAULT == null) {

             ServiceLoader<GraphicsEnvironment> loader = ServiceLoader.load(GraphicsEnvironment.class);

             DEFAULT = loader.iterator().next();

         }

         return DEFAULT == null ? getDummyInstance() : DEFAULT;

     }

     public abstract Image getImageForPath(String path);

     public abstract LinearGradient createLinearGradient();

     public abstract Pattern createPattern();

     public abstract RadialGradient createRadialGradient();

     public abstract TextMetrics createTextMetrics();

     private GraphicsEnvironment getDummyInstance() {

         return new GraphicsEnvironment() {

             @Override

             public Image getImageForPath(String path) {

                return new Image() {

                    @Override

                    public int getHeight() {

                      return 0;

                    }

                    @Override

                    public int getWidth() {

                        return 0;

                    }

                };

             }

             @Override

             public LinearGradient createLinearGradient() {

                 return new LinearGradient() {

                     @Override

                     public void addColorStop(double position, String color) {

                     }

                 };

             }

             @Override

             public Pattern createPattern() {

                return new Pattern() {

 };

             }

             @Override

             public RadialGradient createRadialGradient() {

                 return new RadialGradient() {

                     @Override

                     public void addColorStop(double position, String color) {

                     }

                 };

             }

             @Override

             public TextMetrics createTextMetrics() {

                 return new TextMetrics() {

                     @Override

                     public double getHeight() {

                         return 0;

                     }

                     @Override

                     public double getWidth() {

                         return 0;

                     }

                 };

             }

         };

     }

 }