--- /dev/null Fri Sep 13 12:21:12 2013 +++ new/test/java/awt/Graphics2D/DrawString/TextRenderingTest.java Fri Sep 13 12:21:11 2013 @@ -0,0 +1,111 @@ +/* + * 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/othervm -Dsun.java2d.xrender=True 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; + } + } +} +