Name: bkR10012 Date: 04/25/2001


Spec. of the class javax.imageio.ImageReader says:

"readAll

public IIOImage readAll(int imageIndex,
                        ImageReadParam param)
                 throws IOException

     Reads the image indexed by imageIndex and returns an
     IIOImage containing the image, thumbnails, and
     associated image metadata, using a supplied ImageReadParam."
     
But method readAll does not use ImageReadParam when reading image.
It uses read(imageIndex) instead of read(imageIndex, param).

See test source and log below.
---------------------------------------- test.java
import javax.imageio.*;
import javax.imageio.spi.*;
import javax.imageio.metadata.*;
import javax.imageio.stream.MemoryCacheImageInputStream;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.ByteArrayInputStream;
import java.util.*;

public class test {
    private final static byte[] ba = {};

    public static void main(String argv[]) {
        ImageReader ireader;
        ImageReadParam irp;
        IIOImage image;
        BufferedImage bi;
        BufferedImage bi_1;
        BufferedImage bi_2;
      
        ireader = new DummyImageReaderImpl(null);
        MemoryCacheImageInputStream mciis = new MemoryCacheImageInputStream
            (new ByteArrayInputStream(ba));
        ireader.setInput(mciis);

        irp = new ImageReadParam();
        irp.setDestination(new BufferedImage(10, 10,
                                             BufferedImage.TYPE_3BYTE_BGR));
        try {
            image = ireader.readAll(0, irp);
            bi_1 = ireader.read(0, irp);
            bi_2 = ireader.read(0);
        } catch (java.io.IOException ee) {
            System.out.println("Unexpected exception: " + ee);
            return;
        }
        
        bi = (BufferedImage)image.getRenderedImage();
        
        if ( bi.getType() != bi_1.getType()) {
            System.out.println("Failed.");
            System.out.println(" readAll(0, irp) " + bi.getType());
            System.out.println(" read(0, irp) " + bi_1.getType());
            System.out.println(" read(0) " + bi_2.getType());
        } else {
            System.out.println("Passed.");
        }
    }
}

class DummyImageReaderImpl extends ImageReader {

    public DummyImageReaderImpl(ImageReaderSpi originatingProvider) {
        super(originatingProvider);
    }
    
    public BufferedImage read(int imageIndex, ImageReadParam param)
        throws IOException {
        if (input == null)
            throw new IllegalStateException();
        if (imageIndex >= 1 || imageIndex < 0)
            throw new IndexOutOfBoundsException();
        if (seekForwardOnly) {
            if (imageIndex < minIndex)
                throw new IndexOutOfBoundsException();
            minIndex = imageIndex;
        }
        
        return getDestination(param, getImageTypes(imageIndex), 10, 15);
    }

    public Iterator getImageTypes(int imageIndex) throws IOException {
        if (input == null)
            throw new IllegalStateException();
        if (imageIndex >= 1 || imageIndex < 0)
            throw new IndexOutOfBoundsException();
            
        Vector imageTypes = new Vector();
        imageTypes.add(ImageTypeSpecifier.createFromBufferedImageType
            (BufferedImage.TYPE_BYTE_GRAY ));
        return imageTypes.iterator();
    }

    public int getNumImages(boolean allowSearch) throws IOException {return 1;}
    public int getWidth(int imageIndex) throws IOException {return 1;}
    public int getHeight(int imageIndex) throws IOException {return 1;}
    public IIOMetadata getStreamMetadata() throws IOException {return null;}
    public IIOMetadata getImageMetadata(int imageIndex)
        throws IOException {return null;}
}
----------------------------------------
% java -version
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b61)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b61, mixed mode)
% java test
Failed.
 readAll(0, irp) 10
 read(0, irp) 5
 read(0) 10
----------------------------------------

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

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