112 lines
3.6 KiB
Java
112 lines
3.6 KiB
Java
/*
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* Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.awt.Color;
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import java.awt.Graphics2D;
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import java.awt.GraphicsConfiguration;
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import java.awt.GraphicsEnvironment;
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import java.awt.GradientPaint;
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import java.awt.geom.Point2D;
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import java.awt.Font;
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import java.awt.image.BufferedImage;
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import java.awt.image.VolatileImage;
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/*
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* @test
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* @key headful
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* @bug 7189452 8024767
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* @summary Check if source offset for text rendering is handled correctly
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* (shouldn't see the text on a similarly colored background).
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* @author a.stepanov
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* @run main TextRenderingTest
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*/
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public class TextRenderingTest {
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private static final int width = 450;
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private static final int height = 150;
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public static void main(final String[] args) {
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GraphicsEnvironment ge =
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GraphicsEnvironment.getLocalGraphicsEnvironment();
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GraphicsConfiguration gc =
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ge.getDefaultScreenDevice().getDefaultConfiguration();
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VolatileImage vi = gc.createCompatibleVolatileImage(width, height);
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while (true) {
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vi.validate(gc);
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Graphics2D g2d = vi.createGraphics();
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g2d.setColor(Color.white);
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g2d.fillRect(0, 0, width, height);
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g2d.setPaint(new GradientPaint(
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new Point2D.Float(0, height / 2), Color.white,
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new Point2D.Float(width, height / 2), Color.black));
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g2d.fillRect(0, 0, width, height);
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String fnt = g2d.getFont().getFamily();
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g2d.setFont(new Font(fnt, Font.PLAIN, 100));
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g2d.drawString("IIIIIIIIII", 100, 100); // draw text with offset
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g2d.dispose();
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if (vi.validate(gc) != VolatileImage.IMAGE_OK) {
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try {
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Thread.sleep(100);
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} catch (InterruptedException e) {}
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continue;
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}
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if (vi.contentsLost()) {
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try {
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Thread.sleep(100);
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} catch (InterruptedException e) {}
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continue;
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}
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break;
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}
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BufferedImage bi = vi.getSnapshot();
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// the text shifted shouldn't be visible onto a painted rectangle!
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// so the check: color component (blue) must decrease monotonously
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int prev = Integer.MAX_VALUE;
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for (int x = 0; x < width; ++x) {
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int color = bi.getRGB(x, height / 2);
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int b = color & 0xFF;
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if (b > prev) {
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throw new RuntimeException("test failed: can see the text rendered!");
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}
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prev = b;
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}
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}
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}
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