1 /*
2 * Copyright (c) 2007, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package org.jemmy.image;
26
27 import java.awt.AWTException;
28 import java.awt.Rectangle;
29 import java.awt.Robot;
30 import java.awt.Toolkit;
31
32 import java.awt.image.BufferedImage;
33
34 import java.io.BufferedOutputStream;
35 import java.io.ByteArrayOutputStream;
36 import java.io.File;
37 import java.io.FileNotFoundException;
38 import java.io.IOException;
39 import java.io.FileOutputStream;
40 import java.io.OutputStream;
41
42 import java.util.zip.CRC32;
43 import java.util.zip.Deflater;
44 import java.util.zip.DeflaterOutputStream;
45 import org.jemmy.control.ScreenArea;
46
47 /**
48 * This class allows to encode BufferedImage into B/W, greyscale or true color PNG
49 * image format with maximum compression.<br>
50 * It also provides complete functionality for capturing full screen, part of
51 * screen or single component, encoding and saving captured image info PNG file.
52 * @author Adam Sotona
53 * @version 1.0
54 */
55 public class PNGEncoder extends Object {
56
57 /** black and white image mode. */
58 public static final byte BW_MODE = 0;
59 /** grey scale image mode. */
60 public static final byte GREYSCALE_MODE = 1;
61 /** full color image mode. */
62 public static final byte COLOR_MODE = 2;
63
64 OutputStream out;
65 CRC32 crc;
66 byte mode;
67
68 public PNGEncoder(File file) throws FileNotFoundException {
69 this(new FileOutputStream(file));
70 }
71 /** public constructor of PNGEncoder class with greyscale mode by default.
72 * @param out output stream for PNG image format to write into
73 */
74 public PNGEncoder(OutputStream out) {
75 this(out, GREYSCALE_MODE);
76 }
77
78 /** public constructor of PNGEncoder class.
79 * @param out output stream for PNG image format to write into
80 * @param mode BW_MODE, GREYSCALE_MODE or COLOR_MODE
81 */
82 public PNGEncoder(OutputStream out, byte mode) {
83 crc=new CRC32();
84 this.out = out;
85 if (mode<0 || mode>2)
86 throw new IllegalArgumentException("Unknown color mode");
87 this.mode = mode;
88 }
89
90 void write(int i) throws IOException {
91 byte b[]={(byte)((i>>24)&0xff),(byte)((i>>16)&0xff),(byte)((i>>8)&0xff),(byte)(i&0xff)};
92 write(b);
93 }
94
95 void write(byte b[]) throws IOException {
96 out.write(b);
97 crc.update(b);
98 }
99
100 /** main encoding method (stays blocked till encoding is finished).
101 * @param image BufferedImage to encode
102 * @throws IOException IOException
103 */
104 public void encode(BufferedImage image) throws IOException {
105 encode(image, true);
106 }
107
108 /** main encoding method (stays blocked till encoding is finished).
109 * @param image BufferedImage to encode
110 * @param closeStream requests method to close the stream after the image is written
111 * @throws IOException IOException
112 */
113 public void encode(BufferedImage image, boolean closeStream) throws IOException {
114 int width = image.getWidth(null);
115 int height = image.getHeight(null);
116 final byte id[] = {-119, 80, 78, 71, 13, 10, 26, 10, 0, 0, 0, 13};
117 write(id);
118 crc.reset();
119 write("IHDR".getBytes());
120 write(width);
121 write(height);
122 byte head[]=null;
123 switch (mode) {
124 case BW_MODE: head=new byte[]{1, 0, 0, 0, 0}; break;
125 case GREYSCALE_MODE: head=new byte[]{8, 0, 0, 0, 0}; break;
126 case COLOR_MODE: head=new byte[]{8, 2, 0, 0, 0}; break;
127 }
128 write(head);
129 write((int) crc.getValue());
130 ByteArrayOutputStream compressed = new ByteArrayOutputStream(65536);
131 BufferedOutputStream bos = new BufferedOutputStream( new DeflaterOutputStream(compressed, new Deflater(9)));
132 int pixel;
133 int color;
134 int colorset;
135 switch (mode) {
136 case BW_MODE:
137 int rest=width%8;
138 int bytes=width/8;
139 for (int y=0;y<height;y++) {
140 bos.write(0);
141 for (int x=0;x<bytes;x++) {
142 colorset=0;
143 for (int sh=0; sh<8; sh++) {
144 pixel=image.getRGB(x*8+sh,y);
145 color=((pixel >> 16) & 0xff);
146 color+=((pixel >> 8) & 0xff);
147 color+=(pixel & 0xff);
148 colorset<<=1;
149 if (color>=3*128)
150 colorset|=1;
151 }
152 bos.write((byte)colorset);
153 }
154 if (rest>0) {
155 colorset=0;
156 for (int sh=0; sh<width%8; sh++) {
157 pixel=image.getRGB(bytes*8+sh,y);
158 color=((pixel >> 16) & 0xff);
159 color+=((pixel >> 8) & 0xff);
160 color+=(pixel & 0xff);
161 colorset<<=1;
162 if (color>=3*128)
163 colorset|=1;
164 }
165 colorset<<=8-rest;
166 bos.write((byte)colorset);
167 }
168 }
169 break;
170 case GREYSCALE_MODE:
171 for (int y=0;y<height;y++) {
172 bos.write(0);
173 for (int x=0;x<width;x++) {
174 pixel=image.getRGB(x,y);
175 color=((pixel >> 16) & 0xff);
176 color+=((pixel >> 8) & 0xff);
177 color+=(pixel & 0xff);
178 bos.write((byte)(color/3));
179 }
180 }
181 break;
182 case COLOR_MODE:
183 for (int y=0;y<height;y++) {
184 bos.write(0);
185 for (int x=0;x<width;x++) {
186 pixel=image.getRGB(x,y);
187 bos.write((byte)((pixel >> 16) & 0xff));
188 bos.write((byte)((pixel >> 8) & 0xff));
189 bos.write((byte)(pixel & 0xff));
190 }
191 }
192 break;
193 }
194 bos.close();
195 write(compressed.size());
196 crc.reset();
197 write("IDAT".getBytes());
198 write(compressed.toByteArray());
199 write((int) crc.getValue());
200 write(0);
201 crc.reset();
202 write("IEND".getBytes());
203 write((int) crc.getValue());
204 out.flush();
205 if (closeStream) {
206 out.close();
207 }
208 }
209
210 /** Static method performing screen capture into PNG image format file with given fileName.
211 * @param rect Rectangle of screen to be captured
212 * @param fileName file name for screen capture PNG image file */
213 public static void captureScreen(Rectangle rect, String fileName) {
214 captureScreen(rect, fileName, GREYSCALE_MODE);
215 }
216
217 /** Static method performing screen capture into PNG image format file with given fileName.
218 * @param rect Rectangle of screen to be captured
219 * @param mode image color mode
220 * @param fileName file name for screen capture PNG image file */
221 public static void captureScreen(Rectangle rect, String fileName, byte mode) {
222 try {
223 BufferedImage capture=new Robot().createScreenCapture(rect);
224 BufferedOutputStream file=new BufferedOutputStream(new FileOutputStream(fileName));
225 PNGEncoder encoder=new PNGEncoder(file, mode);
226 encoder.encode(capture);
227 } catch (AWTException awte) {
228 awte.printStackTrace();
229 } catch (IOException ioe) {
230 ioe.printStackTrace();
231 }
232 }
233
234 /** Static method performing one component screen capture into PNG image format file with given fileName.
235 * @param comp Component to be captured
236 * @param fileName String image target filename */
237 public static void captureScreen(ScreenArea comp, String fileName) {
238 captureScreen(comp, fileName, GREYSCALE_MODE);
239 }
240
241 /** Static method performing one component screen capture into PNG image format file with given fileName.
242 * @param comp Component to be captured
243 * @param fileName String image target filename
244 * @param mode image color mode */
245 public static void captureScreen(ScreenArea comp, String fileName, byte mode) {
246 captureScreen(Utils.convert(comp.getScreenBounds()),
247 fileName, mode);
248 }
249
250
251 /** Static method performing whole screen capture into PNG image format file with given fileName.
252 * @param fileName String image target filename */
253 public static void captureScreen(String fileName) {
254 captureScreen(fileName, GREYSCALE_MODE);
255 }
256
257 /** Static method performing whole screen capture into PNG image format file with given fileName.
258 * @param fileName String image target filename
259 * @param mode image color mode */
260 public static void captureScreen(String fileName, byte mode) {
261 captureScreen(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()), fileName, mode);
262 }
263 }