1 /*
2  * Copyright (c) 2005, 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.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
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22  */
23 
24 /*
25  * @test
26  * @bug 4339415
27  * @summary Tests that GIF writer plugin is able to write images with BITMASK
28  *          transparency
29  */
30 
31 import java.awt.Color;
32 import java.awt.Graphics2D;
33 import java.awt.image.BufferedImage;
34 import java.awt.image.IndexColorModel;
35 import java.awt.image.WritableRaster;
36 import java.io.File;
37 import java.io.IOException;
38 
39 import javax.imageio.ImageIO;
40 import javax.imageio.ImageWriter;
41 
42 public class TransparencyTest {
43 
44     protected static final String fname = "ttest.gif";
45     protected BufferedImage src;
46     protected BufferedImage dst;
47 
main(String[] args)48     public static void main(String[] args) {
49         System.out.println("Test indexed image...");
50         IndexColorModel icm = createIndexedBitmaskColorModel();
51         BufferedImage img = createIndexedImage(200, 200, icm);
52         TransparencyTest t = new TransparencyTest(img);
53 
54         try {
55             t.doTest();
56         } catch (Exception e) {
57             throw new RuntimeException("Test failed!", e);
58         }
59         System.out.println("Test passed.");
60     }
61 
TransparencyTest(BufferedImage src)62     protected TransparencyTest(BufferedImage src) {
63         this.src = src;
64     }
65 
doTest()66     protected void doTest() throws IOException {
67         int w = src.getWidth();
68         int h = src.getHeight();
69 
70         System.out.println("Write image...");
71         try {
72             ImageWriter writer =
73                 ImageIO.getImageWritersByFormatName("GIF").next();
74             writer.setOutput(ImageIO.createImageOutputStream(new File(fname)));
75             writer.write(src);
76         } catch (Exception e) {
77             throw new RuntimeException("Test failed.", e);
78         }
79         System.out.println("Read image....");
80         dst = ImageIO.read(new File(fname));
81 
82         BufferedImage tmp = new BufferedImage(w, 2 * h,
83                                               BufferedImage.TYPE_INT_ARGB);
84         Graphics2D g = tmp.createGraphics();
85         g.setColor(Color.pink);
86         g.fillRect(0, 0, tmp.getWidth(), tmp.getHeight());
87 
88         g.drawImage(src, 0, 0, null);
89         g.drawImage(dst, 0, h, null);
90 
91         int width = w / 8;
92         int x = 5 * width + width / 2;
93         for (int y = 0; y < h; y++) {
94             int argb = tmp.getRGB(x, y);
95             if (Color.pink.getRGB() != argb) {
96                 throw new RuntimeException("Bad color at " + x + "," + y +
97                                            " - " + Integer.toHexString(argb));
98             }
99         }
100     }
101 
createIndexedImage(int w, int h, IndexColorModel icm)102     protected static BufferedImage createIndexedImage(int w, int h,
103                                                       IndexColorModel icm)
104     {
105         BufferedImage img = new BufferedImage(w, h,
106                                               BufferedImage.TYPE_BYTE_INDEXED,
107                                               icm);
108 
109         int mapSize = icm.getMapSize();
110         int width = w / mapSize;
111 
112         WritableRaster wr = img.getRaster();
113         for (int i = 0; i < mapSize; i++) {
114             for (int y = 0; y < h; y++) {
115                 for (int x = 0; x < width; x++) {
116                     wr.setSample(i * width + x, y, 0, i);
117                 }
118             }
119         }
120         return img;
121     }
122 
createIndexedBitmaskColorModel()123     protected  static IndexColorModel createIndexedBitmaskColorModel() {
124         int paletteSize = 8;
125         byte[] red = new byte[paletteSize];
126         byte[] green = new byte[paletteSize];
127         byte[] blue = new byte[paletteSize];
128 
129         red[0] = (byte)0xff; green[0] = (byte)0x00; blue[0] = (byte)0x00;
130         red[1] = (byte)0x00; green[1] = (byte)0xff; blue[1] = (byte)0x00;
131         red[2] = (byte)0x00; green[2] = (byte)0x00; blue[2] = (byte)0xff;
132         red[3] = (byte)0xff; green[3] = (byte)0xff; blue[3] = (byte)0xff;
133         red[4] = (byte)0x00; green[4] = (byte)0x00; blue[4] = (byte)0x00;
134         red[5] = (byte)0x80; green[5] = (byte)0x80; blue[5] = (byte)0x80;
135         red[6] = (byte)0xff; green[6] = (byte)0xff; blue[6] = (byte)0x00;
136         red[7] = (byte)0x00; green[7] = (byte)0xff; blue[7] = (byte)0xff;
137 
138         int numBits = 3;
139 
140         IndexColorModel icm = new IndexColorModel(numBits, paletteSize,
141                                                   red, green, blue, 5);
142 
143         return icm;
144     }
145 }
146