| /* |
| * Copyright (c) 1997, 2016, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| package org.netbeans.jemmy.util; |
| |
| import java.awt.Color; |
| import java.awt.image.BufferedImage; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.zip.DataFormatException; |
| import java.util.zip.Inflater; |
| |
| import org.netbeans.jemmy.JemmyException; |
| |
| /** |
| * Allows to load PNG graphical file. |
| * |
| * @author Alexandre Iline |
| */ |
| public class PNGDecoder extends Object { |
| |
| InputStream in; |
| |
| /** |
| * Constructs a PNGDecoder object. |
| * |
| * @param in input stream to read PNG image from. |
| */ |
| public PNGDecoder(InputStream in) { |
| this.in = in; |
| } |
| |
| byte read() throws IOException { |
| byte b = (byte) in.read(); |
| return b; |
| } |
| |
| int readInt() throws IOException { |
| byte b[] = read(4); |
| return (((b[0] & 0xff) << 24) |
| + ((b[1] & 0xff) << 16) |
| + ((b[2] & 0xff) << 8) |
| + ((b[3] & 0xff))); |
| } |
| |
| byte[] read(int count) throws IOException { |
| byte[] result = new byte[count]; |
| for (int i = 0; i < count; i++) { |
| result[i] = read(); |
| } |
| return result; |
| } |
| |
| boolean compare(byte[] b1, byte[] b2) { |
| if (b1.length != b2.length) { |
| return false; |
| } |
| for (int i = 0; i < b1.length; i++) { |
| if (b1[i] != b2[i]) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| void checkEquality(byte[] b1, byte[] b2) { |
| if (!compare(b1, b2)) { |
| throw (new JemmyException("Format error")); |
| } |
| } |
| |
| /** |
| * Decodes image from an input stream passed into constructor. |
| * |
| * @return a BufferedImage object |
| * @throws IOException |
| */ |
| public BufferedImage decode() throws IOException { |
| |
| byte[] id = read(12); |
| checkEquality(id, new byte[]{-119, 80, 78, 71, 13, 10, 26, 10, 0, 0, 0, 13}); |
| |
| byte[] ihdr = read(4); |
| checkEquality(ihdr, "IHDR".getBytes()); |
| |
| int width = readInt(); |
| int height = readInt(); |
| |
| BufferedImage result = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); |
| |
| byte[] head = read(5); |
| int mode; |
| if (compare(head, new byte[]{1, 0, 0, 0, 0})) { |
| mode = PNGEncoder.BW_MODE; |
| } else if (compare(head, new byte[]{8, 0, 0, 0, 0})) { |
| mode = PNGEncoder.GREYSCALE_MODE; |
| } else if (compare(head, new byte[]{8, 2, 0, 0, 0})) { |
| mode = PNGEncoder.COLOR_MODE; |
| } else { |
| throw (new JemmyException("Format error")); |
| } |
| |
| readInt();//!!crc |
| |
| int size = readInt(); |
| |
| byte[] idat = read(4); |
| checkEquality(idat, "IDAT".getBytes()); |
| |
| byte[] data = read(size); |
| |
| Inflater inflater = new Inflater(); |
| inflater.setInput(data, 0, size); |
| |
| int color; |
| |
| try { |
| switch (mode) { |
| case PNGEncoder.BW_MODE: { |
| int bytes = width / 8; |
| if ((width % 8) != 0) { |
| bytes++; |
| } |
| byte colorset; |
| byte[] row = new byte[bytes]; |
| for (int y = 0; y < height; y++) { |
| inflater.inflate(new byte[1]); |
| inflater.inflate(row); |
| for (int x = 0; x < bytes; x++) { |
| colorset = row[x]; |
| for (int sh = 0; sh < 8; sh++) { |
| if (x * 8 + sh >= width) { |
| break; |
| } |
| if ((colorset & 0x80) == 0x80) { |
| result.setRGB(x * 8 + sh, y, Color.white.getRGB()); |
| } else { |
| result.setRGB(x * 8 + sh, y, Color.black.getRGB()); |
| } |
| colorset <<= 1; |
| } |
| } |
| } |
| } |
| break; |
| case PNGEncoder.GREYSCALE_MODE: { |
| byte[] row = new byte[width]; |
| for (int y = 0; y < height; y++) { |
| inflater.inflate(new byte[1]); |
| inflater.inflate(row); |
| for (int x = 0; x < width; x++) { |
| color = row[x]; |
| result.setRGB(x, y, (color << 16) + (color << 8) + color); |
| } |
| } |
| } |
| break; |
| case PNGEncoder.COLOR_MODE: { |
| byte[] row = new byte[width * 3]; |
| for (int y = 0; y < height; y++) { |
| inflater.inflate(new byte[1]); |
| inflater.inflate(row); |
| for (int x = 0; x < width; x++) { |
| result.setRGB(x, y, |
| ((row[x * 3 + 0] & 0xff) << 16) |
| + ((row[x * 3 + 1] & 0xff) << 8) |
| + ((row[x * 3 + 2] & 0xff))); |
| } |
| } |
| } |
| } |
| } catch (DataFormatException e) { |
| throw (new JemmyException("ZIP error", e)); |
| } |
| |
| readInt();//!!crc |
| readInt();//0 |
| |
| byte[] iend = read(4); |
| checkEquality(iend, "IEND".getBytes()); |
| |
| readInt();//!!crc |
| in.close(); |
| |
| return result; |
| } |
| |
| /** |
| * Decodes image from file. |
| * |
| * @param fileName a file to read image from |
| * @return a BufferedImage instance. |
| */ |
| public static BufferedImage decode(String fileName) { |
| try { |
| return new PNGDecoder(new FileInputStream(fileName)).decode(); |
| } catch (IOException e) { |
| throw (new JemmyException("IOException during image reading", e)); |
| } |
| } |
| |
| } |