1 /*
2 * Copyright (c) 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
21 * questions.
22 */
23
24 /*
25 * @test
26 * @bug 8177393
27 * @summary Verify RescaleOp applied to BufferedImages.
28 * @run main ImageRescaleOpTest
29 */
30
31 import java.awt.Graphics2D;
32 import java.awt.image.BufferedImage;
33 import static java.awt.image.BufferedImage.*;
34 import java.awt.image.RescaleOp;
35 import java.awt.Color;
36 import java.io.File;
37 import java.io.IOException;
38 import javax.imageio.ImageIO;
39
40 public class ImageRescaleOpTest {
41
42 int w = 10, h = 10;
43 float scaleFactor = 0.5f;
44 float offset = 0.0f;
45 static boolean saveImage = false;
46
47 public static void main(String[] args) throws Exception {
48 saveImage = args.length > 0;
49 ImageRescaleOpTest test = new ImageRescaleOpTest();
50 test.startTest();
51 }
52
53 String getFileName(int s, int d) {
54 return textFor(s)+"_to_"+textFor(d)+".png";
55 }
56
57 String getMsgText(int s, int d) {
58 return textFor(s)+"->"+textFor(d)+": ";
59 }
60
61 String textFor(int t) {
62 switch (t) {
63 case TYPE_INT_ARGB : return "ARGB";
64 case TYPE_INT_RGB : return "RGB";
65 case TYPE_4BYTE_ABGR : return "4BYTEABGR";
66 case TYPE_3BYTE_BGR : return "3BYTEBGR";
67 case TYPE_USHORT_555_RGB : return "USHORT_555_RGB";
68 case TYPE_USHORT_565_RGB : return "USHORT_565_RGB";
69 case TYPE_USHORT_GRAY : return "USHORT_GRAY";
70 default : return "OTHER";
71 }
72 }
73
74 private void startTest() throws Exception {
75
76 int expect = 0xff7f7f7f;
77 runTest(TYPE_INT_RGB, TYPE_INT_RGB, expect);
78 runTest(TYPE_INT_ARGB, TYPE_INT_ARGB, expect);
79 runTest(TYPE_INT_ARGB, TYPE_INT_RGB, expect);
80 runTest(TYPE_INT_RGB, TYPE_INT_ARGB, expect);
81
82 runTest(TYPE_3BYTE_BGR, TYPE_3BYTE_BGR, expect);
83 runTest(TYPE_3BYTE_BGR, TYPE_4BYTE_ABGR, expect);
84 runTest(TYPE_4BYTE_ABGR, TYPE_3BYTE_BGR, expect);
85 runTest(TYPE_4BYTE_ABGR, TYPE_4BYTE_ABGR, expect);
86
87 /* Slightly different values here due to limited precision */
88 runTest(TYPE_USHORT_555_RGB, TYPE_USHORT_555_RGB, 0xff7b7b7b);
89 runTest(TYPE_USHORT_565_RGB, TYPE_USHORT_565_RGB, 0xff7b7d7b);
90
91 /* 565->555 and 555->565 results are wrong as the slow code
92 * path used is not accounting for the difference in the range.
93 */
94 //runTest(TYPE_USHORT_555_RGB, TYPE_USHORT_565_RGB, expect);
95 //runTest(TYPE_USHORT_565_RGB, TYPE_USHORT_555_RGB, expect);
96
97 runTest(TYPE_USHORT_GRAY, TYPE_USHORT_GRAY, 0xffbcbcbc);
98
99 }
100
101 private void check(BufferedImage bi, int expect, String msg) {
102 int argb = bi.getRGB(w-1, h-1);
103 System.out.println(msg + Integer.toHexString(argb));
104 if (argb != expect) {
105 throw new RuntimeException(msg +
106 " expected " + Integer.toHexString(expect) +
107 " but got " + Integer.toHexString(argb));
108 }
109 }
110
111 private void runTest(int sType, int dType, int expect) {
112
113 BufferedImage src = new BufferedImage(w, h, sType);
114 BufferedImage dst = new BufferedImage(w, h, dType);
115 String msg = getMsgText(sType, dType);
116
117 Graphics2D g2d = src.createGraphics();
118 g2d.setColor(Color.WHITE);
119 g2d.fillRect(0, 0, w, h);
120 RescaleOp res = new RescaleOp(scaleFactor, offset, null);
121 res.filter(src, dst);
122 if (saveImage) {
123 try {
124 String fname = getFileName(sType, dType);
125 ImageIO.write(dst, "png", new File(fname));
126 } catch (IOException e) {
127 }
128 }
129 check(dst, expect, msg);
130 }
131 }