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/*
* Copyright (c) 2018, 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 4954348
* @summary Checks whether JpegImageWriter returns -1 as recommended by the
* specification when getNumThumbnailsSupported method is invoked
* with insufficient data.
* @run main JpegNumThumbnailsTest
*/
import javax.imageio.ImageIO;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.ImageWriter;
import javax.imageio.metadata.IIOMetadata;
import java.awt.image.BufferedImage;
import java.util.Iterator;
import static java.awt.image.BufferedImage.TYPE_INT_RGB;
public class JpegNumThumbnailsTest {
public static void main(String args[]) {
// Test variables.
Iterator<ImageWriter> iterWriter = null;
ImageWriter jpgWriter = null;
IIOMetadata imgMetadata = null;
BufferedImage testImage = null;
ImageTypeSpecifier imgType = null;
int numThumbnails = 0;
iterWriter = ImageIO.getImageWritersByFormatName("JPEG");
if (iterWriter.hasNext()) {
try {
// JpegImageWriter requires either image type or image metadata
// to determine the number of thumbnails that could be
// supported. Hence we test for all possible input combinations
// and observe the result.
jpgWriter = iterWriter.next();
testImage = new BufferedImage(32, 32, TYPE_INT_RGB);
imgType = ImageTypeSpecifier.createFromRenderedImage(testImage);
imgMetadata = jpgWriter.getDefaultImageMetadata(imgType, null);
// Observe the result with insufficient data.
numThumbnails = jpgWriter.getNumThumbnailsSupported(null,
null, null, null);
if (numThumbnails != -1) {
reportException("Incorrect number of thumbnails returned.");
}
// Observe the result with valid image type.
numThumbnails = jpgWriter.getNumThumbnailsSupported(imgType,
null, null, null);
if (numThumbnails != Integer.MAX_VALUE) {
reportException("Incorrect number of thumbnails returned.");
}
// Observe the result with valid image metadata.
numThumbnails = jpgWriter.getNumThumbnailsSupported(null,
null, null, imgMetadata);
if (numThumbnails != Integer.MAX_VALUE) {
reportException("Incorrect number of thumbnails returned.");
}
// Observe the result with valid image type and metadata.
numThumbnails = jpgWriter.getNumThumbnailsSupported(imgType,
null, null, imgMetadata);
if (numThumbnails != Integer.MAX_VALUE) {
reportException("Incorrect number of thumbnails returned.");
}
} finally {
// Dispose the writer
jpgWriter.dispose();
}
}
}
private static void reportException(String message) {
// Report a runtime exception with the required message.
throw new RuntimeException("Test Failed. " + message);
}
}
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