Revision 2438 org.gvsig.raster/trunk/org.gvsig.raster/org.gvsig.raster.lib/org.gvsig.raster.lib.impl/src/main/java/org/gvsig/raster/impl/provider/fusion/AbstractFusionMethod.java

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AbstractFusionMethod.java
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package org.gvsig.raster.impl.provider.fusion;
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import java.awt.geom.AffineTransform;


  		




  
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import java.awt.geom.NoninvertibleTransformException;


  		




  
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import java.awt.geom.Point2D;


  		




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import java.awt.geom.Rectangle2D;


  		




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import org.gvsig.fmap.dal.coverage.dataset.Buffer;


  		




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import org.gvsig.fmap.dal.coverage.datastruct.Extent;


  		




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import org.gvsig.raster.impl.provider.fusion.BufferListFusion.PixelSquareStructure;


  		




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public abstract class AbstractFusionMethod {


  		




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	protected PixelSquareStructure     pxSquare  = null;


  		




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	public class SubSquare {


  		




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		private int    ulxPxDistance = 0;


  		




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		private int    ulyPxDistance = 0;


  		




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		private int    lrxPxDistance = 0;


  		




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		private int    lryPxDistance = 0;


  		




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		private Buffer buffer        = null;


  		




  
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		private AffineTransform    parentTransform  = null;


  		




  
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		private AffineTransform    squareTransform  = null;


  		




  
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		private Extent             squareExtent     = null;


  		




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		public SubSquare(


  		




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				Extent parentExtent,


  		




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				Rectangle2D squareSize,


  		




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				Buffer buf) {


  		




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			this.buffer = buf;


  		




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			double xDistWc = Math.abs(squareExtent.getULX() - parentExtent.getULX());


  		




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			double yDistWc = Math.abs(squareExtent.getULY() - parentExtent.getULY());


  		




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			double pixelSize = parentExtent.width() / parentSize.getWidth();


  		




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			ulxPxDistance = (int)Math.floor(xDistWc * pixelSize);


  		




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			ulyPxDistance = (int)Math.ceil(yDistWc * pixelSize);


  		




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			lrxPxDistance = (int)(ulxPxDistance + squareSize.getWidth() - 1);


  		




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			lryPxDistance = (int)(ulyPxDistance + squareSize.getHeight() - 1);


  		




  
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			this.squareExtent = squareExtent;


  		




  
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			parentTransform = new AffineTransform(


  		




  
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					parentExtent.width() /  parentSize.getWidth(), 


  		




  
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					0, 0, 


  		




  
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					-(parentExtent.height() /  parentSize.getHeight()), 


  		




  
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					parentExtent.getULX(), 


  		




  
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					parentExtent.getULY());


  		




  
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			squareTransform = new AffineTransform(


  		




  
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					squareExtent.width() /  squareSize.getWidth(), 


  		




  
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					0, 0, 


  		




  
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					-(squareExtent.height() /  squareSize.getHeight()), 


  		




  
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					squareExtent.getULX(), 


  		




  
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					squareExtent.getULY());


  		




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		}


  		




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		private Point2D parentRasterToWorld(Point2D pt) {


  		




  
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			return parentTransform.transform(pt, pt);


  		




  
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		}


  		




  
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		private Point2D squareWorldToRaster(Point2D pt) {


  		




  
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			try {


  		




  
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				return squareTransform.inverseTransform(pt, pt);


  		




  
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			} catch (NoninvertibleTransformException e) {


  		




  
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				return pt;


  		




  
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			}


  		




  
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		}


  		




  
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		/**


  		




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		 * Returns true if the pixel coordinates relative to the parent buffer is inside of this square


  		




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		 * @param row


  		




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		 * @param col


  		




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		 * @return


  		




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		 */


  		




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		public boolean isInside(int row, int col) {


  		




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			return (col >= ulxPxDistance && col <= lrxPxDistance && row >= ulyPxDistance && row <= lryPxDistance);


  		




  
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		public Point2D getLocalCoords(int row, int col) {


  		




  
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			Point2D p = parentRasterToWorld(new Point2D.Double(col, row));


  		




  
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			if (p.getX() >= squareExtent.getULX() && p.getX() <= squareExtent.getLRX() && p.getY() <= squareExtent.getULY()  && p.getY() >= squareExtent.getLRY()) {


  		




  
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				return squareWorldToRaster(p);


  		




  
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			}


  		




  
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			return null;


  		




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		}


  		




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		public void loadLocalCoords(int row, int col, int[] coords) {


  		




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			coords[0] = row - ulyPxDistance;


  		




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			coords[1] = col - ulxPxDistance;


  		




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		}


  		




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		public Buffer getBuffer() {


  		




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			return buffer;


  		




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		}


  		




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		this.pxSquare = pxSquare;


  		




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	}


  		




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	public abstract byte[] getByteValue(int row, int col);


  		




  
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	public abstract Byte getByteValue(int row, int col, int band);


  		




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	public abstract float[] getFloatValue(int row, int col);


  		




  
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	public abstract Float getFloatValue(int row, int col, int band);


  		




  
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	public abstract int getBandCount();


  		




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}


  		












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