6829659: Circle is rendered in C shape

Reviewed-by: campbell, flar
Contributed-by: NGoogle <yamauchi@google.com>

src/share/classes/sun/java2d/pisces/PiscesCache.java

@@ -96,7 +96,7 @@ public final class PiscesCache {
             bboxX1 = x1+1;
         } else {
             if (bboxX0 > x0) bboxX0 = x0;
-            if (bboxX1 < x1) bboxX1 = x1;
+            if (bboxX1 < x1 + 1) bboxX1 = x1 + 1;
             while (bboxY1++ < y) {
                 reallocRowInfo(alphaRows+1);
                 minTouched[alphaRows] = 0;

test/sun/pisces/ScaleTest.java

+/*
+ * 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.
+ */
+
+import java.awt.*;
+import java.awt.geom.Ellipse2D;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import javax.imageio.ImageIO;
+
+
+public class ScaleTest {
+  public static void main(String[] args) throws Exception {
+    BufferedImage image = new BufferedImage(200, 200, BufferedImage.TYPE_INT_RGB);
+    Graphics2D g = image.createGraphics();
+
+    g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+    g.setPaint(Color.WHITE);
+    g.fill(new Rectangle(image.getWidth(), image.getHeight()));
+    g.scale(.9, .9);
+    g.setPaint(Color.BLACK);
+    g.setStroke(new BasicStroke(0.5f));
+    g.draw(new Ellipse2D.Double(25, 25, 150, 150));
+
+    // To visually check it
+    //ImageIO.write(image, "PNG", new File(args[0]));
+
+    boolean nonWhitePixelFound = false;
+    for (int x = 100; x < 200; ++x) {
+      if (image.getRGB(x, 90) != Color.WHITE.getRGB()) {
+        nonWhitePixelFound = true;
+        break;
+      }
+    }
+    if (!nonWhitePixelFound) {
+      throw new RuntimeException("A circle is rendered like a 'C' shape.");
+    }
+  }
+}