InterpolationQualityTest.java revision 14851:980da45565c8 
1/*
2 * Copyright (c) 2012, 2016, 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 * @key headful
27 * @bug 7188093 8000176
28 * @summary Tests each of the 3 possible methods for rendering an upscaled
29 * image via rendering hints for default, xrender and opengl pipelines.
30 *
31 * @author Vadim.Pakhnushev@oracle.com
32 * @run main/othervm -Dsun.java2d.xrender=false InterpolationQualityTest
33 * @run main/othervm -Dsun.java2d.xrender=True InterpolationQualityTest
34 * @run main/othervm -Dsun.java2d.opengl=True InterpolationQualityTest
35 * @run main/othervm -Dsun.java2d.d3d=false InterpolationQualityTest
36 * @run main/othervm -Dsun.java2d.d3d=True InterpolationQualityTest
37 */
38
39import java.awt.*;
40import java.awt.image.*;
41import java.io.File;
42import java.io.IOException;
43import javax.imageio.ImageIO;
44
45public class InterpolationQualityTest {
46
47    private static final int testSize = 4, scaleFactor = 20, tolerance = 3;
48    private static final int sw = testSize * scaleFactor;
49    private static final int sh = testSize * scaleFactor;
50
51    private Image testImage;
52    private VolatileImage vImg;
53
54    public InterpolationQualityTest() {
55        testImage = createTestImage();
56    }
57
58    private Image createTestImage() {
59        BufferedImage bi = new BufferedImage(testSize, testSize, BufferedImage.TYPE_INT_ARGB);
60        Graphics2D g = bi.createGraphics();
61        g.setColor(Color.BLACK);
62        g.fillRect(0, 0, testSize, testSize);
63        for (int i = 0; i < testSize; i++) {
64            bi.setRGB(i, i, Color.WHITE.getRGB());
65        }
66        return bi;
67    }
68
69    private BufferedImage createReferenceImage(Object hint) {
70        BufferedImage bi = new BufferedImage(sw, sh, BufferedImage.TYPE_INT_ARGB);
71        Graphics2D g2d = bi.createGraphics();
72        drawImage(g2d, hint);
73        return bi;
74    }
75
76    private void drawImage(Graphics2D g2d, Object hint) {
77        g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, hint);
78        g2d.drawImage(testImage, 0, 0, sw, sh, null);
79    }
80
81    private GraphicsConfiguration getDefaultGC() {
82        return GraphicsEnvironment.getLocalGraphicsEnvironment().
83                getDefaultScreenDevice().getDefaultConfiguration();
84    }
85
86    private void createVImg() {
87        vImg = getDefaultGC().createCompatibleVolatileImage(sw, sh);
88    }
89
90    private void renderOffscreen(Object hint) {
91        Graphics2D g = vImg.createGraphics();
92        drawImage(g, hint);
93        g.dispose();
94    }
95
96    private BufferedImage renderImage(Object hint) {
97        BufferedImage snapshot;
98        createVImg();
99        renderOffscreen(hint);
100
101        do {
102            int status = vImg.validate(getDefaultGC());
103            if (status != VolatileImage.IMAGE_OK) {
104                if (status == VolatileImage.IMAGE_INCOMPATIBLE) {
105                    createVImg();
106                }
107                renderOffscreen(hint);
108            }
109            snapshot = vImg.getSnapshot();
110        } while (vImg.contentsLost());
111        vImg.flush();
112        return snapshot;
113    }
114
115    private boolean compareComponent(int comp1, int comp2) {
116        return Math.abs(comp1 - comp2) <= tolerance;
117    }
118
119    private boolean compareRGB(int rgb1, int rgb2) {
120        Color col1 = new Color(rgb1);
121        Color col2 = new Color(rgb2);
122        return compareComponent(col1.getRed(), col2.getRed()) &&
123                compareComponent(col1.getBlue(), col2.getBlue()) &&
124                compareComponent(col1.getGreen(), col2.getGreen()) &&
125                compareComponent(col1.getAlpha(), col2.getAlpha());
126    }
127
128    private boolean compareImages(BufferedImage img, BufferedImage ref, String imgName) {
129        for (int y = 0; y < ref.getHeight(); y++) {
130            for (int x = 0; x < ref.getWidth(); x++) {
131                if (!compareRGB(ref.getRGB(x, y), img.getRGB(x, y))) {
132                    System.out.println(imgName + ".getRGB(" + x + ", " + y + ") = "
133                            + new Color(img.getRGB(x, y)) + " != "
134                            + new Color(ref.getRGB(x, y)));
135                    return false;
136                }
137            }
138        }
139        return true;
140    }
141
142    private boolean test(Object hint) {
143        BufferedImage refImage = createReferenceImage(hint);
144        BufferedImage resImage = renderImage(hint);
145
146        boolean passed = compareImages(resImage, refImage, "resImage");
147        System.out.println(getHintName(hint) + (passed ? " passed." : " failed."));
148        if (!passed) {
149            dumpImage(refImage, "out_" + getHintName(hint) + "_ref.png");
150            dumpImage(resImage, "out_" + getHintName(hint) + ".png");
151        }
152        return passed;
153    }
154
155    public void test() {
156        boolean passed = true;
157        passed &= test(RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR);
158        passed &= test(RenderingHints.VALUE_INTERPOLATION_BILINEAR);
159        passed &= test(RenderingHints.VALUE_INTERPOLATION_BICUBIC);
160        if (passed) {
161            System.out.println("Test PASSED.");
162        } else {
163            throw new RuntimeException("Test FAILED.");
164        }
165    }
166
167    private String getHintName(Object hint) {
168        if (hint == RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR) {
169            return "nearest";
170        }
171        else if (hint == RenderingHints.VALUE_INTERPOLATION_BILINEAR) {
172            return "bilinear";
173        }
174        else if (hint == RenderingHints.VALUE_INTERPOLATION_BICUBIC) {
175            return "bicubic";
176        }
177        else {
178            return "null";
179        }
180    }
181
182    private void dumpImage(BufferedImage bi, String name) {
183        try {
184            ImageIO.write(bi, "PNG", new File(name));
185        } catch (IOException ex) {
186        }
187    }
188
189    public static void main(String[] argv) {
190        InterpolationQualityTest test = new InterpolationQualityTest();
191        test.test();
192    }
193}
194