8015606: Text is not rendered correctly if destination buffer is custom

Reviewed-by: prr, vadim

jdk/src/share/classes/sun/java2d/loops/MaskFill.java

@@ -36,6 +36,7 @@ import sun.awt.image.BufImgSurfaceData;
 import sun.java2d.loops.GraphicsPrimitive;
 import sun.java2d.SunGraphics2D;
 import sun.java2d.SurfaceData;
+import sun.java2d.pipe.Region;
 
 /**
  * MaskFill
@@ -194,10 +195,13 @@ public class MaskFill extends GraphicsPrimitive
             // REMIND: This is not pretty.  It would be nicer if we
             // passed a "FillData" object to the Pixel loops, instead
             // of a SunGraphics2D parameter...
+            Region clip = sg2d.clipRegion;
+            sg2d.clipRegion = null;
             int pixel = sg2d.pixel;
             sg2d.pixel = tmpData.pixelFor(sg2d.getColor());
             fillop.FillRect(sg2d, tmpData, 0, 0, w, h);
             sg2d.pixel = pixel;
+            sg2d.clipRegion = clip;
 
             maskop.MaskBlit(tmpData, sData, comp, null,
                             0, 0, x, y, w, h,

jdk/test/sun/java2d/loops/RenderToCustomBufferTest.java

@@ -0,0 +1,115 @@
+/*
+ * 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.
+ */
+/**
+ * @test
+ * @bug     8015606
+ * @summary Test verifies whether a text is rendered correctly to
+ *          a custom buffered image.
+ *
+ * @run     main RenderToCustomBufferTest
+ */
+
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.Transparency;
+import java.awt.color.ColorSpace;
+import java.awt.image.BufferedImage;
+import java.awt.image.ColorModel;
+import java.awt.image.ComponentColorModel;
+import java.awt.image.DataBuffer;
+import java.awt.image.WritableRaster;
+
+public class RenderToCustomBufferTest {
+     public static void main(String[] args) {
+        final BufferedImage dst_custom = createCustomBuffer();
+        final BufferedImage dst_dcm = new BufferedImage(width, height,
+                BufferedImage.TYPE_INT_RGB);
+
+        renderTo(dst_custom);
+        renderTo(dst_dcm);
+
+        check(dst_custom, dst_dcm);
+    }
+
+    private static void check(BufferedImage a, BufferedImage b) {
+        for (int y = 0; y < height; y++) {
+            for (int x = 0; x < width; x++) {
+                int pa = a.getRGB(x, y);
+                int pb = b.getRGB(x, y);
+
+                if (pa != pb) {
+                    String msg = String.format(
+                        "Point [%d, %d] has different colors: %08X and %08X",
+                        x, y, pa, pb);
+                    throw new RuntimeException("Test failed: " + msg);
+                }
+            }
+        }
+    }
+
+    private static BufferedImage createCustomBuffer() {
+        ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
+        ColorModel cm = new ComponentColorModel(cs, false, false,
+                Transparency.OPAQUE, DataBuffer.TYPE_FLOAT);
+        WritableRaster wr = cm.createCompatibleWritableRaster(width, height);
+
+        return new BufferedImage(cm, wr, false, null);
+    }
+
+    private static void renderTo(BufferedImage dst) {
+        System.out.println("The buffer: " + dst);
+        Graphics2D g = dst.createGraphics();
+
+        final int w = dst.getWidth();
+        final int h = dst.getHeight();
+
+        g.setColor(Color.blue);
+        g.fillRect(0, 0, w, h);
+
+        g.setColor(Color.red);
+        Font f = g.getFont();
+        g.setFont(f.deriveFont(48f));
+
+        g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
+               RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
+
+        // NB: this clip ctriggers the problem
+        g.setClip(50, 50, 200, 100);
+
+        g.drawString("AA Text", 52, 90);
+
+        g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
+               RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);
+
+        // NB: this clip ctriggers the problem
+        g.setClip(50, 100, 100, 100);
+        g.drawString("Text", 52, 148);
+
+        g.dispose();
+    }
+
+    private static final int width = 230;
+    private static final int height = 150;
+}