6793344: BasicStroke's first element dash pattern is not a dash

Reviewed-by: igor, flar

jdk/src/share/classes/sun/java2d/pisces/Dasher.java

@@ -120,7 +120,7 @@ public class Dasher extends LineSink {
 
         // Normalize so 0 <= phase < dash[0]
         int idx = 0;
-        dashOn = false;
+        dashOn = true;
         int d;
         while (phase >= (d = dash[idx])) {
             phase -= d;

jdk/test/sun/pisces/DashStrokeTest.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/* @test
+ * @summary verify that first element is a dash
+ * @bug 6793344
+ */
+
+import java.awt.*;
+import java.awt.image.*;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.SwingUtilities;
+import javax.swing.WindowConstants;
+
+public class DashStrokeTest extends Component {
+
+    static BufferedImage bi;
+    static boolean printed = false;
+
+    public Dimension getPreferredSize() {
+      return new Dimension(200,200);
+    }
+
+    public static void drawGui() {
+        bi = new BufferedImage(200, 20, BufferedImage.TYPE_INT_RGB);
+        Graphics2D g2d = bi.createGraphics();
+        BasicStroke dashStroke = new BasicStroke(1.0f, BasicStroke.CAP_ROUND,
+                BasicStroke.JOIN_ROUND, 1.0f, new float[] { 0.0f, 200 },
+                1.0f);
+
+        g2d.setStroke(dashStroke);
+        g2d.setColor(Color.RED);
+        g2d.drawLine(5,10, 100,10);
+        printed =true;
+    }
+
+    public static void main(String[] args) {
+            try {
+            SwingUtilities.invokeAndWait(new Runnable() {
+
+            @Override
+            public void run() {
+                drawGui();
+            }
+
+            });
+            } catch (Exception e) {
+            }
+
+            if (printed) {
+                checkBI(bi, Color.RED);
+            }
+    }
+
+    static void checkBI(BufferedImage bi, Color badColor) {
+      int badrgb = badColor.getRGB();
+
+      int col = bi.getRGB(6, 9);
+      if (col == badrgb) {
+          throw new RuntimeException("A pixel was turned on. ");
+      }
+   }
+}
+