1 files changed, 98 insertions, 0 deletions
diff --git a/test/java/awt/BasicStroke/DashZeroWidth.java b/test/java/awt/BasicStroke/DashZeroWidth.java
new file mode 100644
index 0000000000..fb0f51ce4a
--- /dev/null
+++ b/test/java/awt/BasicStroke/DashZeroWidth.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2003, 2017, 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.
+ */
+
+import java.awt.BasicStroke;
+import java.awt.Color;
+import java.awt.Graphics2D;
+import java.awt.GraphicsConfiguration;
+import java.awt.GraphicsEnvironment;
+import java.awt.Image;
+import java.awt.geom.Line2D;
+import java.awt.image.BufferedImage;
+import java.awt.image.VolatileImage;
+
+import static java.awt.image.BufferedImage.TYPE_INT_ARGB;
+
+/**
+ * @test
+ * @bug 4779211 8019816
+ * @summary REGRESSION: 1.4 Dashed lines disappear if BasicStroke width=0.0
+ * @run main/othervm -Dsun.java2d.uiScale=1 DashZeroWidth
+ */
+public final class DashZeroWidth {
+
+    public static void main(final String[] args) {
+        BufferedImage img = new BufferedImage(200, 40, TYPE_INT_ARGB);
+        draw(img);
+        validate(img);
+
+        if (GraphicsEnvironment.isHeadless()) {
+            return;
+        }
+
+        GraphicsConfiguration gc =
+                GraphicsEnvironment.getLocalGraphicsEnvironment()
+                        .getDefaultScreenDevice().getDefaultConfiguration();
+
+        VolatileImage vi = gc.createCompatibleVolatileImage(200, 40);
+        BufferedImage snapshot;
+        int attempt = 0;
+        while (true) {
+            if (++attempt > 10) {
+                throw new RuntimeException("Too many attempts: " + attempt);
+            }
+            vi.validate(gc);
+            draw(vi);
+            snapshot = vi.getSnapshot();
+            if (!vi.contentsLost()) {
+                break;
+            }
+        }
+        validate(snapshot);
+    }
+
+    private static void draw(final Image img) {
+        float[] dashes = {10.0f, 10.0f};
+        BasicStroke bs = new BasicStroke(0.0f, BasicStroke.CAP_BUTT,
+                                         BasicStroke.JOIN_BEVEL, 10.0f, dashes,
+                                         0.0f);
+        Graphics2D g = (Graphics2D) img.getGraphics();
+        g.setColor(Color.WHITE);
+        g.fillRect(0, 0, 200, 40);
+        Line2D line = new Line2D.Double(20, 20, 180, 20);
+        g.setColor(Color.BLACK);
+        g.setStroke(bs);
+        g.draw(line);
+        g.dispose();
+    }
+
+    private static void validate(final BufferedImage img) {
+        int black = Color.black.getRGB();
+        int white = Color.white.getRGB();
+        int pointB = img.getRGB(25, 20);   // point on the dash
+        int pointW = img.getRGB(35, 20);   // point in the gap
+        if (pointB != black || pointW != white) {
+            throw new RuntimeException("Line should be visible and dashed");
+        }
+    }
+}