8004859: Graphics.getClipBounds/getClip return difference nonequivalent...

8004859: Graphics.getClipBounds/getClip return difference nonequivalent bounds, depending from transform
Reviewed-by: prr, flar

src/share/classes/sun/java2d/SunGraphics2D.java

@@ -1795,20 +1795,10 @@ public final class SunGraphics2D
     }
 
     public Rectangle getClipBounds() {
-        Rectangle r;
         if (clipState == CLIP_DEVICE) {
-            r = null;
-        } else if (transformState <= TRANSFORM_INT_TRANSLATE) {
-            if (usrClip instanceof Rectangle) {
-                r = new Rectangle((Rectangle) usrClip);
-            } else {
-                r = usrClip.getBounds();
-            }
-            r.translate(-transX, -transY);
-        } else {
-            r = getClip().getBounds();
+            return null;
         }
-        return r;
+        return getClipBounds(new Rectangle());
     }
 
     public Rectangle getClipBounds(Rectangle r) {
@@ -1817,11 +1807,11 @@ public final class SunGraphics2D
                 if (usrClip instanceof Rectangle) {
                     r.setBounds((Rectangle) usrClip);
                 } else {
-                    r.setBounds(usrClip.getBounds());
+                    r.setFrame(usrClip.getBounds2D());
                 }
                 r.translate(-transX, -transY);
             } else {
-                r.setBounds(getClip().getBounds());
+                r.setFrame(getClip().getBounds2D());
             }
         } else if (r == null) {
             throw new NullPointerException("null rectangle parameter");
@@ -1996,10 +1986,10 @@ public final class SunGraphics2D
             matrix[2] = matrix[0] + rect.getWidth();
             matrix[3] = matrix[1] + rect.getHeight();
             tx.transform(matrix, 0, matrix, 0, 2);
-            rect = new Rectangle2D.Float();
-            rect.setFrameFromDiagonal(matrix[0], matrix[1],
-                                      matrix[2], matrix[3]);
-            return rect;
+            fixRectangleOrientation(matrix, rect);
+            return new Rectangle2D.Double(matrix[0], matrix[1],
+                                          matrix[2] - matrix[0],
+                                          matrix[3] - matrix[1]);
         }
 
         if (tx.isIdentity()) {
@@ -2009,6 +1999,22 @@ public final class SunGraphics2D
         return tx.createTransformedShape(clip);
     }
 
+    /**
+     * Sets orientation of the rectangle according to the clip.
+     */
+    private static void fixRectangleOrientation(double[] m, Rectangle2D clip) {
+        if (clip.getWidth() > 0 != (m[2] - m[0] > 0)) {
+            double t = m[0];
+            m[0] = m[2];
+            m[2] = t;
+        }
+        if (clip.getHeight() > 0 != (m[3] - m[1] > 0)) {
+            double t = m[1];
+            m[1] = m[3];
+            m[3] = t;
+        }
+    }
+
     public void clipRect(int x, int y, int w, int h) {
         clip(new Rectangle(x, y, w, h));
     }

test/java/awt/Graphics2D/Test8004859/Test8004859.java

+/*
+ * Copyright (c) 2013, 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.Graphics2D;
+import java.awt.Rectangle;
+import java.awt.Shape;
+import java.awt.geom.NoninvertibleTransformException;
+import java.awt.image.BufferedImage;
+
+import sun.java2d.SunGraphics2D;
+
+/**
+ * @test
+ * @bug 8004859
+ * @summary getClipBounds/getClip should return equivalent bounds.
+ * @author Sergey Bylokhov
+ */
+public final class Test8004859 {
+
+    private static Shape[] clips = {new Rectangle(0, 0, 1, 1), new Rectangle(
+            100, 100, -100, -100)};
+
+    private static boolean status = true;
+
+    public static void main(final String[] args)
+            throws NoninvertibleTransformException {
+        final BufferedImage bi = new BufferedImage(300, 300,
+                                                   BufferedImage.TYPE_INT_RGB);
+        final Graphics2D g = (Graphics2D) bi.getGraphics();
+        test(g);
+        g.translate(2.0, 2.0);
+        test(g);
+        g.translate(-4.0, -4.0);
+        test(g);
+        g.scale(2.0, 2.0);
+        test(g);
+        g.scale(-4.0, -4.0);
+        test(g);
+        g.rotate(Math.toRadians(90));
+        test(g);
+        g.rotate(Math.toRadians(90));
+        test(g);
+        g.rotate(Math.toRadians(90));
+        test(g);
+        g.rotate(Math.toRadians(90));
+        test(g);
+        g.dispose();
+        if (!status) {
+            throw new RuntimeException("Test failed");
+        }
+    }
+
+    private static void test(final Graphics2D g) {
+        for (final Shape clip : clips) {
+            g.setClip(clip);
+            if (!g.getClip().equals(clip)) {
+                System.err.println("Expected clip: " + clip);
+                System.err.println("Actual clip: " + g.getClip());
+                System.err.println("bounds="+g.getClip().getBounds2D());
+                System.err.println("bounds="+g.getClip().getBounds());
+                status = false;
+            }
+            final Rectangle bounds = g.getClipBounds();
+            if (!clip.equals(bounds)) {
+                System.err.println("Expected getClipBounds(): " + clip);
+                System.err.println("Actual getClipBounds(): " + bounds);
+                status = false;
+            }
+            g.getClipBounds(bounds);
+            if (!clip.equals(bounds)) {
+                System.err.println("Expected getClipBounds(r): " + clip);
+                System.err.println("Actual getClipBounds(r): " + bounds);
+                status = false;
+            }
+            if (!clip.getBounds2D().isEmpty() && ((SunGraphics2D) g).clipRegion
+                    .isEmpty()) {
+                System.err.println("clipRegion should not be empty");
+                status = false;
+            }
+        }
+    }
+}