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/***********************************************************************************************************************
 *
 * Mistral - open source imaging engine
 * Copyright (C) 2003-2012 by Tidalwave s.a.s.
 *
 ***********************************************************************************************************************
 *
 * Licensed 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.
 *
 ***********************************************************************************************************************
 *
 * WWW: http://mistral.imajine.org
 * SCM: https://bitbucket.org/tidalwave/mistral-src
 *
 **********************************************************************************************************************/
package org.imajine.image.jai;

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.ImageObserver;
import javax.media.jai.PlanarImage;
import org.imajine.image.EditableImage;
import org.imajine.image.render.PreviewSettings;
import org.imajine.image.op.OperationImplementation;
import org.imajine.image.op.PaintOp;
import lombok.extern.slf4j.Slf4j;

/***********************************************************************************************************************
 *
 * @author  Emmanuele Sordini
 * @author  Fabrizio Giudici
 * @version $Id: PaintJAIOp.java,v 20e39e8c9fac 2012/02/02 16:35:02 fabrizio $
 *
 **********************************************************************************************************************/
@Slf4j
public class PaintJAIOp extends OperationImplementation
  {
    @Override
    protected PlanarImage execute (PaintOp operation, final EditableImage image, PlanarImage planarImage)
      {
        int x = operation.getX();
        int y = operation.getY();
        int w = operation.getW();
        int h = operation.getH();
        Graphics2D g2 = operation.getGraphics2D();
        PreviewSettings previewSettings = operation.getPreviewSettings();
        ImageObserver imageObserver = operation.getImageObserver();
        
        // TODO: doesn't manage tiles
        
        if (w != 0)
          {
            // TODO: doesn't deal with quality (resampling)
            // http://www.informit.com/articles/article.asp?p=23668&seqNum=3
            double scaleX = (double)w / planarImage.getWidth();
            double scaleY = (double)h / planarImage.getHeight();
            AffineTransform xform = AffineTransform.getTranslateInstance(x, y); 
            xform.concatenate(AffineTransform.getScaleInstance(scaleX, scaleY));
            g2.drawRenderedImage(planarImage, xform);
          }
        
        else
          {
            // http://www.informit.com/articles/article.asp?p=23668&seqNum=3
            AffineTransform xform = AffineTransform.getTranslateInstance(x, y);
            g2.drawRenderedImage(planarImage, xform);
          }
        
        return planarImage;
      }
  }