Name: bkR10012 Date: 06/08/2001


Spec. of the class javax.imageio.ImageTypeSpecifier
doesn't describe any exceptions for methods
createGrayscale(bits, dataType, isSigned)
createGrayscale(bits, dataType, isSigned, isAlphaPremultiplied)

But these methods throw unexpected exceptions in following cases:

- bits = 100;
IllegalArgumentException: Number of bits must be between 1 and 16.

- bits = 10; dataType = DataBuffer.TYPE_BYTE;
java.awt.image.RasterFormatException: MultiPixelPackedSampleModel does not
allow pixels to span data element boundaries

- dataType = 100;
IllegalArgumentException: Unknown data type 100

See test source and log below.
---------------------------------------- test.java
import javax.imageio.ImageTypeSpecifier;
import java.awt.image.DataBuffer;

public class test {

    public static void main(String argv[]) {
        test t = new test();
        t.createGrayscaleTest();
    }

    public void createGrayscaleTest() {
    int bits = 8;
    int dataType = DataBuffer.TYPE_BYTE;
    boolean isSigned = true;
// testcase 1
        try {
            ImageTypeSpecifier.createGrayscale(100, dataType, isSigned);
        } catch (Throwable e) {
            System.out.println("testcase 1: " + e);
        }
 // testcase 2
        try {
            ImageTypeSpecifier.createGrayscale(10, dataType, isSigned);
        } catch (Throwable e) {
            System.out.println("testcase 2: " + e);
        }
// testcase 3
        try {
            ImageTypeSpecifier.createGrayscale(bits, 100, isSigned);
        } catch (Throwable e) {
            System.out.println("testcase 3: " + e);
        }
   }
}
----------------------------------------
% java -version
java version "1.4.0-beta_refresh"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta_refresh-b66)
Java HotSpot(TM) Client VM (build 1.4.0-beta_refresh-b66, mixed mode)
% java test
testcase 1: java.lang.IllegalArgumentException: Number of bits must be between 1
and 16.
testcase 2: java.awt.image.RasterFormatException: MultiPixelPackedSampleModel
does not allow pixels to span data element boundaries
testcase 3: java.lang.IllegalArgumentException: Unknown data type 100
----------------------------------------

This bug causes failure of the new JCK test
api/javax_imageio/ImageTypeSpecifier/index.html#createGrayscale

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