87 lines
3.1 KiB
Java
87 lines
3.1 KiB
Java
/*
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* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8204187
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* @run main TestWriteARGBJPEG
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* @summary verify JPEG Alpha support is as reported.
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*/
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import java.io.IOException;
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import java.util.Iterator;
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import java.io.ByteArrayOutputStream;
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import java.awt.image.BufferedImage;
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import javax.imageio.ImageIO;
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import javax.imageio.ImageWriter;
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import javax.imageio.ImageTypeSpecifier;
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import javax.imageio.spi.ImageWriterSpi;
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import javax.imageio.stream.MemoryCacheImageOutputStream;
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public class TestWriteARGBJPEG {
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public static void main(String args[]) throws IOException {
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BufferedImage bi =
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new BufferedImage(10,10,BufferedImage.TYPE_INT_ARGB);
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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// There should be no exception from the next line
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// which internally should be relying on the canEncodeImage
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// method which we'll also test directly.
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boolean ret = ImageIO.write(bi, "jpeg", baos);
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System.out.println("ImageIO.write(..) returned " + ret);
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ImageTypeSpecifier its = new ImageTypeSpecifier(bi);
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Iterator<ImageWriter> writers = ImageIO.getImageWriters(its, "jpeg");
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boolean hasWriter = writers.hasNext();
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// If this can't write it, an exception will be thrown.
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if (writers.hasNext()) {
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System.out.println("A writer was found.");
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ImageWriter iw = writers.next();
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MemoryCacheImageOutputStream mos =
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new MemoryCacheImageOutputStream(baos);
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iw.setOutput(mos);
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iw.write(bi);
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}
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// Now Let's also ask the default JPEG writer's SPI if it
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// can write an ARGB image.
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ImageWriter iw = ImageIO.getImageWritersByFormatName("jpeg").next();
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ImageWriterSpi iwSpi = iw.getOriginatingProvider();
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boolean canEncode = iwSpi.canEncodeImage(bi);
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System.out.println("SPI canEncodeImage returned " + canEncode);
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// Now let's see if it is telling the truth.
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try {
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MemoryCacheImageOutputStream mos =
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new MemoryCacheImageOutputStream(baos);
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iw.setOutput(mos);
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iw.write(bi);
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} catch (IOException e) {
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if (canEncode) {
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throw e;
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}
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}
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}
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}
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