| /* |
| * 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); |
| } |
| } |