Examples of java.awt.image.ShortLookupTable

java.awt.image.ShortLookupTable
This class defines a lookup table object. The output of a lookup operation using an object of this class is interpreted as an unsigned short quantity. The lookup table contains short 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 ByteLookupTable @see LookupOp @version 10 Feb 1997

  
  public void testConstructor1(TestHarness harness)
  {
    harness.checkPoint("(int, byte[])");
    short[] shorts = new short[] {0xAA, 0xBB};
    ShortLookupTable t = new ShortLookupTable(7, shorts);
    harness.check(t.getOffset(), 7);
    harness.check(t.getNumComponents(), 1);
    short[][] table = t.getTable();
    harness.check(table.length, 1);
    harness.check(table[0] == shorts);
    
    // try negative offset
    boolean pass = false;
    try
    {
      t = new ShortLookupTable(-1, shorts);
    }
    catch (IllegalArgumentException e)
    {
      pass = true;
    }
    harness.check(pass);
    
    // try null data
    pass = false;
    try
    {
      t = new ShortLookupTable(0, (short[]) null);
    }
    catch (NullPointerException e)
    {
      pass = true;
    }

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  {
    harness.checkPoint("(int, byte[][])");
    short[] shortsA = new short[] {0xAA, 0xBB, 0xCC};
    short[] shortsB = new short[] {0xDD, 0xEE, 0xFF};
    short[][] shorts = new short[][] { shortsA, shortsB };
    ShortLookupTable t = new ShortLookupTable(3, shorts);
    harness.check(t.getOffset(), 3);
    harness.check(t.getNumComponents(), 2);
    short[][] table = t.getTable();
    harness.check(table.length, 2);
    harness.check(table[0] == shortsA);
    harness.check(table[1] == shortsB);
    harness.check(table != shorts);
    
    // try negative offset
    boolean pass = false;
    try
    {
      t = new ShortLookupTable(-1, shorts);
    }
    catch (IllegalArgumentException e)
    {
      pass = true;
    }
    harness.check(pass);
    
    // try null data
    pass = false;
    try
    {
      t = new ShortLookupTable(0, (short[][]) null);
    }
    catch (NullPointerException e)
    {
      pass = true;
    }

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  public void test1(TestHarness harness)
  {
    harness.checkPoint("test1()");
    short[] shorts = new short[] {0xAA, 0xBB};
    ShortLookupTable t = new ShortLookupTable(7, shorts);
    short[][] table = t.getTable();
    harness.check(table.length, 1);
    harness.check(table[0] == shorts);
    harness.check(t.getTable() == t.getTable());
  }

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  {
    harness.checkPoint("test2()");
    short[] shortsA = new short[] {0xAA, 0xBB, 0xCC};
    short[] shortsB = new short[] {0xDD, 0xEE, 0xFF};
    short[][] shorts = new short[][] { shortsA, shortsB };
    ShortLookupTable t = new ShortLookupTable(3, shorts);
    short[][] table = t.getTable();
    harness.check(table.length, 2);
    harness.check(table[0] == shortsA);
    harness.check(table[1] == shortsB);
    harness.check(table != shorts);
    harness.check(t.getTable() == t.getTable());
  }

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  private void testInt(TestHarness harness) 
  {
    harness.checkPoint("(int[], int[])");
    short[] data = {105, 104, 103, 102, 101, 100};
    ShortLookupTable t = new ShortLookupTable(100, data);
    
    // check 1-band source with 1-band lookup table
    int[] src = new int[] {100};
    int[] dst = t.lookupPixel(src, null);
    harness.check(dst[0], 105);
    
    src = new int[] {101};
    dst = new int[] {0};
    dst = t.lookupPixel(src, dst);
    harness.check(dst[0], 104);
    
    // check 3-band source with 1-band lookup table
    src = new int[] {100, 101, 102};
    try {
        dst = t.lookupPixel(src, null);
        harness.check(dst[0], 105);
        harness.check(dst[1], 104);
        harness.check(dst[2], 103);
    }
    catch (Exception e) {      // don't allow a failure to 
        harness.check(false);  // disrupt remaining checks
        harness.debug(e);
    }


    src = new int[] {102, 103, 104};
    dst = new int[] {0, 0, 0};
    try {
        dst = t.lookupPixel(src, dst);
        harness.check(dst[0], 103);
        harness.check(dst[1], 102);
        harness.check(dst[2], 101);
    }
    catch (Exception e) {      // don't allow a failure to 
        harness.check(false);  // disrupt remaining checks
        harness.debug(e);
    }


    // check 3-band source with 3-band lookup table
    short[][] data2 = {
      {105, 104, 103, 102, 101, 100},
      {115, 114, 113, 112, 111, 110},
      {125, 124, 123, 122, 121, 120}
    };
    ShortLookupTable t2 = new ShortLookupTable(100, data2);
    
    int[] src2 = {100, 101, 102};
    dst = t2.lookupPixel(src2, null);
    harness.check(dst[0], 105);
    harness.check(dst[1], 114);
    harness.check(dst[2], 123);
    
    src2 = new int[] {103, 104, 105};
    dst = new int[] {0, 0, 0};
    dst = t2.lookupPixel(src2, dst);
    harness.check(dst[0], 102);
    harness.check(dst[1], 111);
    harness.check(dst[2], 120);


    // check 1-band source with 2-band lookup table
    short[][] data3 = {
      {105, 104, 103, 102, 101, 100},
      {115, 114, 113, 112, 111, 110},
    };
    ShortLookupTable t3 = new ShortLookupTable(100, data3);
    src = new int[] {100};
    dst = t3.lookupPixel(src, null);
    harness.check(dst[0], 105);


    src = new int[] {101};
    dst = new int[] {0};
    dst = t3.lookupPixel(src, dst);
    harness.check(dst[0], 104);


    // check 3-band source with 2-band lookup table
    try {
        dst = t3.lookupPixel(src2, null);
        harness.check(false);
    }
    catch (ArrayIndexOutOfBoundsException e) {
        harness.check(true);
    }


    dst = new int[3];
    try {
        dst = t3.lookupPixel(src2, dst);
        harness.check(false);
    }
    catch (ArrayIndexOutOfBoundsException e) {
        harness.check(true);
    }

View Full Code Here


  private void testShort(TestHarness harness)   
  {
    harness.checkPoint("(short[], short[])");
    short[] data = {105, 104, 103, 102, 101, 100};
    ShortLookupTable t = new ShortLookupTable(100, data);
    
    // check 1-band source with 1-band lookup table
    short[] src = new short[] {100};
    short[] dst = t.lookupPixel(src, null);
    harness.check(dst[0], 105);
    
    src = new short[] {101};
    dst = new short[] {0};
    dst = t.lookupPixel(src, dst);
    harness.check(dst[0], 104);


    // check 3-band source with 1-band lookup table
    src = new short[] {100, 101, 102};
    try {
        dst = t.lookupPixel(src, null);
        harness.check(dst[0], 105);
        harness.check(dst[1], 104);
        harness.check(dst[2], 103);
    }
    catch (Exception e) {      // don't allow a failure to 
        harness.check(false);  // disrupt remaining checks
        harness.debug(e);
    }
    
    src = new short[] {102, 103, 104};
    dst = new short[] {0, 0, 0};
    try {
        dst = t.lookupPixel(src, dst);
        harness.check(dst[0], 103);
        harness.check(dst[1], 102);
        harness.check(dst[2], 101);
    }
    catch (Exception e) {      // don't allow a failure to 
        harness.check(false);  // disrupt remaining checks
        harness.debug(e);
    }


    // check 3-band source with 3-band lookup table
    short[][] data2 = {
      {105, 104, 103, 102, 101, 100},
      {115, 114, 113, 112, 111, 110},
      {125, 124, 123, 122, 121, 120}
    };
    ShortLookupTable t2 = new ShortLookupTable(100, data2);
    short[] src2 = {100, 101, 102};
    dst = t2.lookupPixel(src2, null);
    harness.check(dst[0], 105);
    harness.check(dst[1], 114);
    harness.check(dst[2], 123);
    
    src2 = new short[] {103, 104, 105};
    dst = new short[] {0, 0, 0};
    dst = t2.lookupPixel(src2, dst);
    harness.check(dst[0], 102);
    harness.check(dst[1], 111);
    harness.check(dst[2], 120);


    // check 1-band source with 2-band lookup table
    short[][] data3 = {
      {105, 104, 103, 102, 101, 100},
      {115, 114, 113, 112, 111, 110},
    };
    ShortLookupTable t3 = new ShortLookupTable(100, data3);
    src = new short[] {100};
    dst = t3.lookupPixel(src, null);
    harness.check(dst[0], 105);
    
    src = new short[] {101};
    dst = new short[1];
    dst = t3.lookupPixel(src, dst);
    harness.check(dst[0], 104);


    // check 3 band source, 2 band lookup table
    try {
        dst = t3.lookupPixel(src2, null);
        harness.check(false);
    }
    catch (ArrayIndexOutOfBoundsException e) {
        harness.check(true);
    }
   
    dst = new short[3];
    try {
        dst = t3.lookupPixel(src2, dst);
        harness.check(false);
    }
    catch (ArrayIndexOutOfBoundsException e) {
        harness.check(true);
    }

View Full Code Here

  // It should throw array index out of bounds exceptions.
  private void testFailure(TestHarness harness)
  {
    harness.checkPoint("not in table");
    short[] data = {105, 104, 103, 102, 101, 100};
    ShortLookupTable t = new ShortLookupTable(100, data);
    
    try
    {
      int[] src = new int[] {120};
      t.lookupPixel(src, null);
      harness.check(false);
    }
    catch (ArrayIndexOutOfBoundsException ex)
    {
      harness.check(true);
    }
    
    try
    {
      short[] src = new short[] {120};
      t.lookupPixel(src, null);
      harness.check(false);
    }
    catch (ArrayIndexOutOfBoundsException ex)
    {
      harness.check(true);

View Full Code Here

    short[][] lutarray = new short[][] {{12, 23, 14, 35, 48, 2},
                                        {112, 123, 114, 135, 148, 102},
                                        {212, 223, 214, 235, 248, 202}
                                       };
    
    ShortLookupTable t = new ShortLookupTable(0, lutarray);
    LookupOp op = new LookupOp(t, null);
    BufferedImage dst = new BufferedImage(5, 5, BufferedImage.TYPE_INT_ARGB);


    /* This causes Sun to throw an exception...
     *

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                                        {112, 123, 114, 135, 148, 102},
                                        {212, 223, 214, 235, 248, 202},
                                        {62, 73, 64, 85, 98, 52}
                                       };
    
    ShortLookupTable t = new ShortLookupTable(0, lutarray);
    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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    r.setSample(1, 1, 0, 20);


    // We get the ArrayIndexOutOfBoundsException that we would expect when
    // using a ShortLookupTable...
    short[] lutarray = new short[] {0, 1, 2, 3, 4, 5, 6, 7, 8};
    ShortLookupTable t = new ShortLookupTable(0, lutarray);
    LookupOp op = new LookupOp(t, null);
    
    try
    {
      op.filter(img, null);

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