/**

  * 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 org.apidesign.bck2brwsr.htmlpage;

 import net.java.html.canvas.ImageData;

 import org.apidesign.bck2brwsr.core.JavaScriptBody;

 /**

  *

  * @author Anton Epple <toni.epple@eppleton.de>

  */

 public class ImageDataWrapper implements ImageData {

     private double width, height = -1;

     private Object imageData;

     private Data data;

     public ImageDataWrapper(Object imageData) {

         this.imageData = imageData;

     }

     private Data getData() {

         if (data == null) {

             data = new Data(getDataImpl(imageData));

         }

         return data;

     }

     @JavaScriptBody(args = {"imageData"}, body = "return imageData.data")

     public native Object getDataImpl(Object imageData);

     public double getWidth() {

         if (width == -1) {

             width = getWidthImpl(imageData);

         }

         return width;

     }

     @JavaScriptBody(args = {"imageData"}, body = "return imagedata.width;")

     private static native int getWidthImpl(Object imageData);

     public double getHeight() {

         if (height == -1) {

             height = getHeightImpl(imageData);

         }

         return height;

     }

     @JavaScriptBody(args = {"imageData"}, body = "return imagedata.height;")

     private static native int getHeightImpl(Object imageData);

     Object object() {

         return imageData;

     }

     @Override

     public int getR(int x, int y) {

         int idx = (x + y * (int)width) * 4;

         return getData().get(idx);

     }

     @Override

     public int getG(int x, int y) {

         int idx = (x + y * (int)width) * 4;

         return getData().get(idx + 1);

     }

     @Override

     public int getB(int x, int y) {

         int idx = (x + y * (int)width) * 4;

         return getData().get(idx + 2);

     }

     @Override

     public int getA(int x, int y) {

         int idx = (x + y * (int)width) * 4;

         return getData().get(idx + 3);

     }

     @Override

     public void setR(int x, int y, int value) {

         int idx = (x + y * (int)width) * 4;

         getData().set(idx, value);

     }

     @Override

     public void setG(int x, int y, int value) {

         int idx = (x + y * (int)width) * 4;

         getData().set(idx + 1, value);

     }

     @Override

     public void setB(int x, int y, int value) {

         int idx = (x + y * (int)width) * 4;

         getData().set(idx + 2, value);

     }

     @Override

     public void setA(int x, int y, int value) {

         int idx = (x + y * (int)width) * 4;

         getData().set(idx + 3, value);

     }

     private static class Data {

         Object data;

         public Data(Object data) {

             this.data = data;

         }

         public int get(int index) {

             return getImpl(data, index);

         }

         public void set(int index, int value) {

             setImpl(data, index, value);

         }

         @JavaScriptBody(args = {"data", "index", "value"}, body = "data[index]=value;")

         private static native void setImpl(Object data, int index, int value);

         @JavaScriptBody(args = {"imagedata", "index"}, body = "return data[index];")

         private static native int getImpl(Object data, int index);

     }

 }