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

     * different heights or widths.
     */
    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

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

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

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

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  {
    harness.checkPoint("test2()");
    byte[] bytesA = new byte[] {(byte) 0xAA, (byte) 0xBB, (byte) 0xCC};
    byte[] bytesB = new byte[] {(byte) 0xDD, (byte) 0xEE, (byte) 0xFF};
    byte[][] bytes = new byte[][] { bytesA, bytesB };
    ByteLookupTable t = new ByteLookupTable(3, bytes);
    byte[][] table = t.getTable();
    harness.check(table.length, 2);
    harness.check(table[0] == bytesA);
    harness.check(table[1] == bytesB);
    harness.check(table != bytes);
    harness.check(t.getTable() == t.getTable());
  }

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  private void testInt(TestHarness harness) 
  {
    harness.checkPoint("(int[], int[])");
    byte[] data = {105, 104, 103, 102, 101, 100};
    ByteLookupTable t = new ByteLookupTable(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
    byte[][] data2 = {
      {105, 104, 103, 102, 101, 100},
      {115, 114, 113, 112, 111, 110},
      {125, 124, 123, 122, 121, 120}
    };
    ByteLookupTable t2 = new ByteLookupTable(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
    byte[][] data3 = {
      {105, 104, 103, 102, 101, 100},
      {115, 114, 113, 112, 111, 110},
    };
    ByteLookupTable t3 = new ByteLookupTable(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);
    }

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


    // check 3-band source with 1-band lookup table
    src = new byte[] {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 byte[] {102, 103, 104};
    dst = new byte[] {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
    byte[][] data2 = {
      {105, 104, 103, 102, 101, 100},
      {115, 114, 113, 112, 111, 110},
      {125, 124, 123, 122, 121, 120}
    };
    ByteLookupTable t2 = new ByteLookupTable(100, data2);
    byte[] 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 byte[] {103, 104, 105};
    dst = new byte[] {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
    byte[][] data3 = {
      {105, 104, 103, 102, 101, 100},
      {115, 114, 113, 112, 111, 110},
    };
    ByteLookupTable t3 = new ByteLookupTable(100, data3);
    src = new byte[] {100};
    dst = t3.lookupPixel(src, null);
    harness.check(dst[0], 105);
    
    src = new byte[] {101};
    dst = new byte[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 byte[3];
    try {
        dst = t3.lookupPixel(src2, dst);
        harness.check(false);
    }
    catch (ArrayIndexOutOfBoundsException e) {
        harness.check(true);
    }

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

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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());

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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,

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

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

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