Examples of java.awt.image.ByteLookupTable

java.awt.image.ByteLookupTable
This class defines a lookup table object. The output of a lookup operation using an object of this class is interpreted as an unsigned byte quantity. The lookup table contains byte data arrays for one or more bands (or components) of an image, and it contains an offset which will be subtracted from the input values before indexing the arrays. This allows an array smaller than the native data size to be provided for a constrained input. If there is only one array in the lookup table, it will be applied to all bands. @see ShortLookupTable @see LookupOp @version 10 Feb 1997

  
  public void testMethod2(TestHarness harness)
  {
    harness.checkPoint("(Raster)");    
    byte[] bytes = new byte[] {(byte) 0xAA, (byte) 0xBB};
    ByteLookupTable t = new ByteLookupTable(0, bytes);
    LookupOp op = new LookupOp(t, null);
    Raster raster = Raster.createWritableRaster(
            new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE, 10, 20, 8), 
            null);
    Rectangle2D bounds = op.getBounds2D(raster);

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    // Create an image to work on
    BufferedImage img = new BufferedImage(20, 20, BufferedImage.TYPE_USHORT_GRAY);
    
    byte[] bytes = new byte[] {(byte) 0xAA, (byte) 0xBB};
    ByteLookupTable t = new ByteLookupTable(0, bytes);
    LookupOp op = new LookupOp(t, null);
    
    // Simple tests
    BufferedImage dst = op.filter(img, null);
    harness.check(dst.getType(), op.createCompatibleDestImage(img, null).getType());

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    else
      img = new BufferedImage(5, 5, BufferedImage.TYPE_INT_ARGB);
    createImage(img);
    
    byte[] bytes = new byte[] {12, 23, 14, 35, 48, 2};
    ByteLookupTable t = new ByteLookupTable(0, bytes);
    LookupOp op = new LookupOp(t, null);
    
    BufferedImage dst = new BufferedImage(5, 5, BufferedImage.TYPE_INT_ARGB);
    dst = op.filter(img, dst);
    WritableRaster dest = dst.getRaster();

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    }


    // But a ByteLookupTable will give us undetermined results
    // (is a native array overflowing in sun's implementation?)
    byte[] bytes = new byte[] {0, 1, 2, 3, 4, 5, 6, 7, 8};
    ByteLookupTable t2 = new ByteLookupTable(0, bytes);
    op = new LookupOp(t2, null);
    
    try
    {
      op.filter(img, null);

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public class getPoint2D implements Testlet
{
  public void test(TestHarness harness)
  {
    byte[] bytes = new byte[] {(byte) 0xAA, (byte) 0xBB};
    ByteLookupTable t = new ByteLookupTable(0, bytes);
    LookupOp op = new LookupOp(t, null);
    Point2D p = new Point2D.Double(1.0, 2.0);
    Point2D pp = new Point2D.Double();
    Point2D p1 = op.getPoint2D(p, pp);
    harness.check(p1, p);

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        // For what ever reason this makes the Op work correctly.
        // If you remove this, it seems to get the color channels messed
        // up.  The downside is that I suspect that this means we are
        // falling into a more general, and hence slower case, but
        // at least it works....
        operation  =  new LookupOp(new ByteLookupTable(0, tableData), hints) 
            { };
    }

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        for ( int counter = 0; counter < 256; counter++ )
           invertArray[ counter ] = ( byte )( 255 - counter );   
        
        // create filter to invert colors
        BufferedImageOp invertFilter = new LookupOp(
           new ByteLookupTable( 0, invertArray ), null );
        
        // apply filter to displayImage
        return invertFilter.filter( buff, null );


    }

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        for ( int counter = 0; counter < 256; counter++ )
           invertArray[ counter ] = ( byte )( 255 - counter );   
        
        // create filter to invert colors
        BufferedImageOp invertFilter = new LookupOp(
           new ByteLookupTable( 0, invertArray ), null );
        
        // apply filter to displayImage
        return invertFilter.filter( buff, null );


    }

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        for ( int counter = 0; counter < 256; counter++ )
           invertArray[ counter ] = ( byte )( 255 - counter );   
        
        // create filter to invert colors
        BufferedImageOp invertFilter = new LookupOp(
           new ByteLookupTable( 0, invertArray ), null );
        
        // apply filter to displayImage
        return invertFilter.filter( buff, null );


    }

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        // For what ever reason this makes the Op work correctly.
        // If you remove this, it seems to get the color channels messed
        // up.  The downside is that I suspect that this means we are
        // falling into a more general, and hence slower case, but
        // at least it works....
        operation  =  new LookupOp(new ByteLookupTable(0, tableData), hints) 
            { };
    }

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Related Classes of java.awt.image.ByteLookupTable

DisplayProject.UIutils

gnu.testlet.java.awt.image.ByteLookupTable.constructors

gnu.testlet.java.awt.image.ByteLookupTable.getTable

gnu.testlet.java.awt.image.ByteLookupTable.lookupPixel

gnu.testlet.java.awt.image.LookupOp.constructor

gnu.testlet.java.awt.image.LookupOp.createCompatibleDestImage

gnu.testlet.java.awt.image.LookupOp.createCompatibleDestRaster

gnu.testlet.java.awt.image.LookupOp.filterImage

gnu.testlet.java.awt.image.LookupOp.filterRaster

gnu.testlet.java.awt.image.LookupOp.getBounds2D

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