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/*
* Copyright (c) 2002, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 4450894
* @summary Tests if the JPEGImageWriter allows images with > 8-bit samples to
* be written. Also tests the JPEGImageWriterSpi.canEncodeImage()
* mechanism for this same behavior.
*/
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;
public class UshortGrayTest {
public static void main(String[] args) {
Iterator iter;
BufferedImage bi = new BufferedImage(10, 10,
BufferedImage.TYPE_USHORT_GRAY);
// Part 1: ensure that JPEGImageWriter throws an exception if it
// encounters an image with 16-bit samples
ImageWriter writer = null;
iter = ImageIO.getImageWritersByFormatName("jpeg");
if (iter.hasNext()) {
writer = (ImageWriter)iter.next();
} else {
throw new RuntimeException("No JPEG reader found");
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageOutputStream ios = null;
boolean exceptionThrown = false;
try {
ios = ImageIO.createImageOutputStream(baos);
} catch (IOException ioe) {
throw new RuntimeException("Could not create ImageOutputStream");
}
try {
writer.setOutput(ios);
writer.write(bi);
} catch (IOException ioe) {
exceptionThrown = true;
}
if (!exceptionThrown) {
throw new RuntimeException("JPEG writer should not be able to " +
"write USHORT_GRAY images");
}
// Part 2: ensure that JPEGImageWriterSpi.canEncodeImage() returns
// false for images with 16-bit samples
ImageTypeSpecifier its =
ImageTypeSpecifier.createFromRenderedImage(bi);
iter = ImageIO.getImageWriters(its, "jpeg");
if (iter.hasNext()) {
throw new RuntimeException("JPEG writer should not be available" +
" for USHORT_GRAY images");
}
}
}
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