8024767: [TEST] need test to cover JDK-7189452
Reviewed-by: ceisserer, bae
Contributed-by: alexander.v.stepanov@oracle.com
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/awt/Graphics2D/DrawString/TextRenderingTest.java Wed Nov 27 15:15:40 2013 +0400
@@ -0,0 +1,110 @@
+/*
+ * 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.Color;
+import java.awt.Graphics2D;
+import java.awt.GraphicsConfiguration;
+import java.awt.GraphicsEnvironment;
+import java.awt.GradientPaint;
+import java.awt.geom.Point2D;
+
+import java.awt.Font;
+
+import java.awt.image.BufferedImage;
+import java.awt.image.VolatileImage;
+
+
+/*
+ * @test
+ * @bug 7189452 8024767
+ * @summary Check if source offset for text rendering is handled correctly
+ * (shouldn't see the text on a similarly colored background).
+ * @author a.stepanov
+ * @run main TextRenderingTest
+ */
+
+public class TextRenderingTest {
+
+ private static final int width = 450;
+ private static final int height = 150;
+
+ public static void main(final String[] args) {
+
+ GraphicsEnvironment ge =
+ GraphicsEnvironment.getLocalGraphicsEnvironment();
+ GraphicsConfiguration gc =
+ ge.getDefaultScreenDevice().getDefaultConfiguration();
+ VolatileImage vi = gc.createCompatibleVolatileImage(width, height);
+
+ while (true) {
+ vi.validate(gc);
+ Graphics2D g2d = vi.createGraphics();
+ g2d.setColor(Color.white);
+ g2d.fillRect(0, 0, width, height);
+
+ g2d.setPaint(new GradientPaint(
+ new Point2D.Float(0, height / 2), Color.white,
+ new Point2D.Float(width, height / 2), Color.black));
+ g2d.fillRect(0, 0, width, height);
+
+ String fnt = g2d.getFont().getFamily();
+ g2d.setFont(new Font(fnt, Font.PLAIN, 100));
+ g2d.drawString("IIIIIIIIII", 100, 100); // draw text with offset
+
+ g2d.dispose();
+
+ if (vi.validate(gc) != VolatileImage.IMAGE_OK) {
+ try {
+ Thread.sleep(100);
+ } catch (InterruptedException e) {}
+ continue;
+ }
+
+ if (vi.contentsLost()) {
+ try {
+ Thread.sleep(100);
+ } catch (InterruptedException e) {}
+ continue;
+ }
+
+ break;
+ }
+
+ BufferedImage bi = vi.getSnapshot();
+
+ // the text shifted shouldn't be visible onto a painted rectangle!
+ // so the check: color component (blue) must decrease monotonously
+
+ int prev = Integer.MAX_VALUE;
+ for (int x = 0; x < width; ++x) {
+ int color = bi.getRGB(x, height / 2);
+ int b = color & 0xFF;
+
+ if (b > prev) {
+ throw new RuntimeException("test failed: can see the text rendered!");
+ }
+
+ prev = b;
+ }
+ }
+}