138 lines
4.9 KiB
Java
138 lines
4.9 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 8211795
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* @summary Test verifies that PNGImageReader maintains proper
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* number of bands for scale array when PNG image
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* has tRNS chunk.
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* @run main VerifyBitDepthScalingWithTRNSChunk
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*/
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import java.awt.Graphics2D;
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import java.awt.image.BufferedImage;
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import java.awt.Color;
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import java.awt.image.IndexColorModel;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.Iterator;
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import javax.imageio.ImageTypeSpecifier;
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import javax.imageio.ImageWriter;
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import javax.imageio.ImageIO;
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import javax.imageio.ImageWriteParam;
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import javax.imageio.metadata.IIOInvalidTreeException;
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import javax.imageio.metadata.IIOMetadata;
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import javax.imageio.metadata.IIOMetadataNode;
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import javax.imageio.stream.ImageOutputStream;
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import javax.imageio.IIOImage;
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public class VerifyBitDepthScalingWithTRNSChunk {
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private static BufferedImage img;
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private static ImageWriter writer;
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private static ImageWriteParam param;
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private static IIOMetadata metadata;
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private static byte[] imageByteArray;
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private static void initialize(int type) {
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int width = 1;
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int height = 1;
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// create Palette & IndexColorModel for bitdepth 1
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int size = 2;
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int bitDepth = 1;
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byte[] r = new byte[size];
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byte[] g = new byte[size];
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byte[] b = new byte[size];
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r[0] = g[0] = b[0] = 0;
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r[1] = g[1] = b[1] = (byte)255;
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IndexColorModel cm = new IndexColorModel(bitDepth, size, r, g, b);
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img = new BufferedImage(width, height, type, cm);
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Graphics2D g2D = img.createGraphics();
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g2D.setColor(new Color(255, 255, 255));
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g2D.fillRect(0, 0, width, height);
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Iterator<ImageWriter> iterWriter =
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ImageIO.getImageWritersBySuffix("png");
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writer = iterWriter.next();
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param = writer.getDefaultWriteParam();
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ImageTypeSpecifier specifier =
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ImageTypeSpecifier.
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createFromBufferedImageType(type);
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metadata = writer.getDefaultImageMetadata(specifier, param);
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}
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private static void createTRNSNode(String tRNS_value)
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throws IIOInvalidTreeException {
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IIOMetadataNode tRNS_gray = new IIOMetadataNode("tRNS_Grayscale");
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tRNS_gray.setAttribute("gray", tRNS_value);
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IIOMetadataNode tRNS = new IIOMetadataNode("tRNS");
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tRNS.appendChild(tRNS_gray);
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IIOMetadataNode root = new IIOMetadataNode("javax_imageio_png_1.0");
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root.appendChild(tRNS);
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metadata.mergeTree("javax_imageio_png_1.0", root);
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}
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private static void writeImage() throws IOException {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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ImageOutputStream ios = ImageIO.createImageOutputStream(baos);
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writer.setOutput(ios);
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writer.write(metadata, new IIOImage(img, null, metadata), param);
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writer.dispose();
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baos.flush();
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imageByteArray = baos.toByteArray();
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baos.close();
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}
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private static void verifyBitDepthScalingWithTRNSChunk()
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throws IOException {
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initialize(BufferedImage.TYPE_BYTE_BINARY);
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// Create tRNS node with some value and merge it with default metadata
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createTRNSNode("255");
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writeImage();
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InputStream input= new ByteArrayInputStream(imageByteArray);
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/*
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* Read 1 bit PNG Gray image with tRNS chunk.
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* Since bitDepth is 1 there will be scaling of each channel,
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* and it has tRNS chunk for which we will add extra alpha channel.
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* This will result in creation of scale array in PNGImageReader.
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*/
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ImageIO.read(input);
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input.close();
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}
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public static void main(String[] args) throws IOException {
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verifyBitDepthScalingWithTRNSChunk();
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}
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}
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