Examples of java.awt.image.LookupOp

java.awt.image.LookupOp
This class implements a lookup operation from the source to the destination. The LookupTable object may contain a single array or multiple arrays, subject to the restrictions below.
For Rasters, the lookup operates on bands. The number of lookup arrays may be one, in which case the same array is applied to all bands, or it must equal the number of Source Raster bands.
For BufferedImages, the lookup operates on color and alpha components. The number of lookup arrays may be one, in which case the same array is applied to all color (but not alpha) components. Otherwise, the number of lookup arrays may equal the number of Source color components, in which case no lookup of the alpha component (if present) is performed. If neither of these cases apply, the number of lookup arrays must equal the number of Source color components plus alpha components, in which case lookup is performed for all color and alpha components. This allows non-uniform rescaling of multi-band BufferedImages.
BufferedImage sources with premultiplied alpha data are treated in the same manner as non-premultiplied images for purposes of the lookup. That is, the lookup is done per band on the raw data of the BufferedImage source without regard to whether the data is premultiplied. If a color conversion is required to the destination ColorModel, the premultiplied state of both source and destination will be taken into account for this step.
Images with an IndexColorModel cannot be used.
If a RenderingHints object is specified in the constructor, the color rendering hint and the dithering hint may be used when color conversion is required.
This class allows the Source to be the same as the Destination. @version 10 Feb 1997 @see LookupTable @see java.awt.RenderingHints#KEY_COLOR_RENDERING @see java.awt.RenderingHints#KEY_DITHERING

     */
    public final void test_LookupOp_filter_DifferentDimentionsTest() {
        // regression test for Harmony-1632
        byte[] array0 = new byte[96];
        ByteLookupTable localByteLookupTable = new ByteLookupTable(1, array0);
        LookupOp localLookupOp = new LookupOp(localByteLookupTable, null);


        BufferedImage localBufferedImage = getImage(5069, 19);


        // filter(BI,BI) non-equal widths
        BufferedImage localBufferedImage1 = getImage(6, 19);
        try {
            localLookupOp.filter(localBufferedImage, localBufferedImage1);
            fail("IllegalArgumentException expected!");
        } catch (IllegalArgumentException e) {
            // expected
        }


        // filter(R,WR) non-equal widths


        try {
            localLookupOp.filter(localBufferedImage.getRaster(),
                    localBufferedImage1.getRaster());
            fail("IllegalArgumentException expected!");
        } catch (IllegalArgumentException e) {
            // expected
        }


        // filter(BI,BI) non-equal heights


        localBufferedImage1 = getImage(5069, 5);
        try {
            localLookupOp.filter(localBufferedImage, localBufferedImage1);
            fail("IllegalArgumentException expected!");
        } catch (IllegalArgumentException e) {
            // expected
        }


        // filter(R, WR) non-equal heights
        try {
            localLookupOp.filter(localBufferedImage.getRaster(),
                    localBufferedImage1.getRaster());
            fail("IllegalArgumentException expected!");
        } catch (IllegalArgumentException e) {
            // expected
        }

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     */
    public final void test_LookupOp_LookupTableRenderingHints_NullLookupTable() {
        // regression test for Harmony-1629
        RenderingHints hints = new RenderingHints(null);
        try {
            LookupOp returnValue = new LookupOp((LookupTable)null, hints);
            fail("NullPointerException expected");
        } catch (NullPointerException npe) {
            // expected
        }
    }

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    harness.checkPoint("createCompatibleDestImage");


    // Simple test
    byte[] bytes = new byte[] {(byte) 0xAA, (byte) 0xBB};
    ByteLookupTable t = new ByteLookupTable(0, bytes);
    LookupOp op = new LookupOp(t, null);
    
    BufferedImage img = new BufferedImage(25, 40, BufferedImage.TYPE_INT_RGB);
    
    BufferedImage dest = op.createCompatibleDestImage(img, img.getColorModel());
    
    harness.check(dest.getHeight(), 40);
    harness.check(dest.getWidth(), 25);
    harness.check(dest.getColorModel(), img.getColorModel());
    
    // Try a different colour model
    img = new BufferedImage(25, 40, BufferedImage.TYPE_INT_RGB);
    DirectColorModel cm = new DirectColorModel(16, 0x0f00, 0x00f0, 0x000f);
    dest = op.createCompatibleDestImage(img, cm);
    
    harness.check(dest.getHeight(), 40);
    harness.check(dest.getWidth(), 25);
    harness.check(dest.getColorModel(), cm);
  }

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  // Test all the default color models
  private void colorModelTest(TestHarness harness)
  {
    byte[] bytes = new byte[] {(byte) 0xAA, (byte) 0xBB};
    ByteLookupTable t = new ByteLookupTable(0, bytes);
    LookupOp op = new LookupOp(t, null);


    int[] types = {BufferedImage.TYPE_INT_RGB,
                   BufferedImage.TYPE_INT_ARGB,
                   BufferedImage.TYPE_INT_ARGB_PRE,
                   BufferedImage.TYPE_3BYTE_BGR,
                   BufferedImage.TYPE_4BYTE_ABGR,
                   BufferedImage.TYPE_4BYTE_ABGR_PRE,
                   BufferedImage.TYPE_USHORT_565_RGB,
                   BufferedImage.TYPE_USHORT_555_RGB,
                   BufferedImage.TYPE_BYTE_GRAY,
                   BufferedImage.TYPE_USHORT_GRAY};
    // Skipped types that are not implemented yet:
    // TYPE_CUSTOM, TYPE_INT_BGR, TYPE_BYTE_BINARY, TYPE_BYTE_INDEXED


    for (int i = 0; i < types.length; i++)
      {
        int type = types[i];
        harness.checkPoint("type: " + type);
        
        BufferedImage img = new BufferedImage(25, 40, type);
        BufferedImage dest = op.createCompatibleDestImage(img, null);
        
        // Unlike most Ops, this one creates a clone of the original image
        
        // Except there's a strange exception for TYPE_USHORT_GRAY ???
        if (type == BufferedImage.TYPE_USHORT_GRAY)

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{
  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);
    harness.check(op.getTable() == t);
  }

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  {
    byte[] bytes = new byte[] {(byte) 0xAA, (byte) 0xBB};
    ByteLookupTable t = new ByteLookupTable(0, bytes);
    RenderingHints r = new RenderingHints(RenderingHints.KEY_COLOR_RENDERING,
            RenderingHints.VALUE_COLOR_RENDER_QUALITY);
    LookupOp op = new LookupOp(t, r);
    harness.check(op.getRenderingHints() == r);
    op = new LookupOp(t, null);
    harness.check(op.getRenderingHints() == null);
  }

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  {
    byte[] bytes = new byte[] {(byte) 0xAA, (byte) 0xBB};
    ByteLookupTable t = new ByteLookupTable(0, bytes);
    RenderingHints r = new RenderingHints(RenderingHints.KEY_COLOR_RENDERING,
            RenderingHints.VALUE_COLOR_RENDER_QUALITY);
    LookupOp op = new LookupOp(t, r);
    harness.check(op.getTable() == t);
    harness.check(op.getRenderingHints() == r);


    // try null RenderingHints
    op = new LookupOp(t, null);
    harness.check(op.getRenderingHints(), null);
  }

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    Raster src = createRasterA();
    WritableRaster dest = src.createCompatibleWritableRaster();
    
    byte[] bytes = new byte[] {(byte) 0xAA, (byte) 0xBB};
    ByteLookupTable t = new ByteLookupTable(0, bytes);
    LookupOp op = new LookupOp(t, null);
    
    dest = op.filter(src, dest);
    harness.check(dest.getSample(0, 0, 0), 1);
    harness.check(dest.getSample(1, 0, 0), 2);
    harness.check(dest.getSample(2, 0, 0), 3);
    harness.check(dest.getSample(3, 0, 0), 4);
    harness.check(dest.getSample(4, 0, 0), 5);

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    Raster src = createRasterA();
    WritableRaster dest = src.createCompatibleWritableRaster();
    
    byte[] bytes = new byte[] {(byte) 0xAA, (byte) 0xBB};
    ByteLookupTable t = new ByteLookupTable(0, bytes);
    LookupOp op = new LookupOp(t, null);
    dest = op.filter(src, dest);
    
    harness.check(dest.getSample(0, 0, 0), 0);
    harness.check(dest.getSample(1, 0, 0), 0);
    harness.check(dest.getSample(2, 0, 0), 0);
    harness.check(dest.getSample(3, 0, 0), 0);

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    Raster src = createRasterA();
    WritableRaster dest = src.createCompatibleWritableRaster();
    
    byte[] bytes = new byte[] {(byte) 0xAA, (byte) 0xBB};
    ByteLookupTable t = new ByteLookupTable(0, bytes);
    LookupOp op = new LookupOp(t, null);
    
    dest = op.filter(src, dest);
    harness.check(dest.getSample(0, 0, 0), 1);
    harness.check(dest.getSample(1, 0, 0), 2);
    harness.check(dest.getSample(2, 0, 0), 3);
    harness.check(dest.getSample(3, 0, 0), 4);
    harness.check(dest.getSample(4, 0, 0), 5);

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