8286624: Regression Test CoordinateTruncationBug.java fails on OL8.3

Backport-of: c71d87e54ca0c0173583bed978e06c7faa0fa283

Author: Victor Rudometov

test/jdk/sun/java2d/SunGraphics2D/CoordinateTruncationBug.java

@@ -0,0 +1,271 @@
+/*
+ * Copyright (c) 2003, 2022, 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.
+ *
+ * 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.
+ */
+
+/*
+ * @test
+ * @bug 4975116 7040022 8023577 8025447 8286624
+ * @key headful
+ * @summary verify the rounding of negative coordinates in Shape objects
+ * @run main/othervm CoordinateTruncationBug
+ */
+
+import java.awt.Frame;
+import java.awt.Canvas;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Robot;
+import java.awt.Rectangle;
+import java.awt.Point;
+import java.awt.Dimension;
+import java.awt.Color;
+import java.awt.AWTException;
+import java.awt.geom.Line2D;
+import java.awt.image.BufferedImage;
+import java.awt.image.VolatileImage;
+
+public class CoordinateTruncationBug {
+    static boolean failure;
+    static boolean verbose;
+
+    static final int W = 80;
+    static final int H = 80;
+
+    static final Line2D vertline = new Line2D.Float(-0.7f, 0f, -0.7f, H);
+    static final Line2D horizline = new Line2D.Float(0f, -0.7f, W, -0.7f);
+
+    public static void main(String argv[]) {
+        verbose = (argv.length > 0);
+        new Screen().test();
+        new BufImg().test();
+        new VolImg().test();
+        if (failure) {
+            throw new RuntimeException("Test failed due to 1 or more failures");
+        }
+    }
+
+    public static abstract class Test {
+        public abstract String getName();
+        public abstract void makeDest();
+        public abstract void runTest();
+        public abstract void dispose();
+        public abstract BufferedImage getSnapshot();
+
+        public void test() {
+            makeDest();
+            runTest();
+            dispose();
+        }
+
+        public void runTest(Graphics2D g2d) {
+            g2d.setColor(Color.white);
+            g2d.fillRect(0, 0, W, H);
+
+            if (!checkAllWhite()) {
+                System.err.println("Aborting test of "+getName()+
+                                   " due to readback failure!");
+                return;
+            }
+
+            g2d.setColor(Color.red);
+            g2d.draw(vertline);
+            g2d.draw(horizline);
+            if (!checkAllWhite()) {
+                System.err.println(getName()+" failed!");
+                failure = true;
+            }
+        }
+
+        public boolean checkAllWhite() {
+            BufferedImage bimg = getSnapshot();
+            if (bimg == null) {
+                System.err.println(getName()+" returned null snapshot!");
+                return false;
+            }
+            boolean ret = true;
+            for (int y = 0; y < H; y++) {
+                for (int x = 0; x < W; x++) {
+                    int rgb = bimg.getRGB(x, y);
+                    if (rgb != -1) {
+                        System.err.println(getName()+"("+x+", "+y+") == "+
+                                           Integer.toHexString(rgb));
+                        if (verbose) {
+                            ret = false;
+                        } else {
+                            return false;
+                        }
+                    }
+                }
+            }
+            return ret;
+        }
+    }
+
+    public static class Screen extends Test {
+        Frame frame;
+        TestCanvas canvas;
+
+        public String getName() {
+            return "Screen";
+        }
+
+        public void makeDest() {
+            frame = new Frame("Screen test");
+            frame.setUndecorated(true);
+            canvas = new TestCanvas(this);
+            frame.add(canvas);
+            frame.pack();
+            frame.setLocationRelativeTo(null);
+        }
+
+        public void runTest() {
+            frame.show();
+            canvas.waitForTest();
+        }
+
+        public Graphics2D createGraphics() {
+            return null;
+        }
+
+        public BufferedImage getSnapshot() {
+            // bypass window animation
+            try {
+                Thread.sleep(500);
+            } catch (InterruptedException e) {
+            };
+
+            try {
+                Robot r = new Robot();
+                Point p = canvas.getLocationOnScreen();
+                return r.createScreenCapture(new Rectangle(p.x, p.y, W, H));
+            } catch (AWTException e) {
+                return null;
+            }
+        }
+
+        public void dispose() {
+            frame.hide();
+            frame.dispose();
+        }
+
+        public static class TestCanvas extends Canvas {
+            Test test;
+            boolean done;
+
+            public TestCanvas(Test test) {
+                this.test = test;
+            }
+
+            public Dimension getPreferredSize() {
+                return new Dimension(W, H);
+            }
+
+            public synchronized void waitForTest() {
+                while (!done) {
+                    try {
+                        wait();
+                    } catch (InterruptedException e) {
+                        System.err.println(getName()+" interrupted!");
+                        failure = true;
+                        break;
+                    }
+                }
+            }
+
+            public void paint(Graphics g) {
+                if (!done) {
+                    test.runTest((Graphics2D) g);
+                    notifyDone();
+                }
+            }
+
+            public synchronized void notifyDone() {
+                done = true;
+                notifyAll();
+            }
+        }
+    }
+
+    public abstract static class Standalone extends Test {
+        public abstract Graphics2D createGraphics();
+
+        public void runTest() {
+            Graphics2D g2d = createGraphics();
+            runTest(g2d);
+            g2d.dispose();
+        }
+    }
+
+    public static class BufImg extends Standalone {
+        public BufferedImage bimg;
+
+        public String getName() {
+            return "BufferedImage";
+        }
+
+        public void makeDest() {
+            bimg = new BufferedImage(W, H, BufferedImage.TYPE_INT_RGB);
+        }
+
+        public Graphics2D createGraphics() {
+            return bimg.createGraphics();
+        }
+
+        public BufferedImage getSnapshot() {
+            return bimg;
+        }
+
+        public void dispose() {
+        }
+    }
+
+    public static class VolImg extends Standalone {
+        Frame frame;
+        VolatileImage vimg;
+
+        public String getName() {
+            return "VolatileImage";
+        }
+
+        public void makeDest() {
+            frame = new Frame();
+            frame.setSize(W, H);
+            frame.setLocationRelativeTo(null);
+            frame.show();
+            vimg = frame.createVolatileImage(W, H);
+        }
+
+        public Graphics2D createGraphics() {
+            return vimg.createGraphics();
+        }
+
+        public BufferedImage getSnapshot() {
+            return vimg.getSnapshot();
+        }
+
+        public void dispose() {
+            vimg.flush();
+            frame.hide();
+            frame.dispose();
+        }
+    }
+}