027fdb2d3b
Use abs(at.getDeterminant()) in userSpaceLineWidth() to ensure positive value Reviewed-by: prr, jdv
105 lines
3.6 KiB
Java
105 lines
3.6 KiB
Java
/*
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* Copyright (c) 2019, 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.BasicStroke;
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import java.awt.Color;
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import java.awt.Graphics2D;
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import java.awt.Rectangle;
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import java.awt.RenderingHints;
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import java.awt.geom.AffineTransform;
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import java.awt.geom.Ellipse2D;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import java.io.IOException;
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import javax.imageio.ImageIO;
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/**
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* Tests calculating user space line with a negative determinant (flip).
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*
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* @test
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* @summary verify that flipped transformed lines are properly rasterized
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* @bug 8230728
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*/
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public class FlipBitTest {
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static final boolean SAVE_IMAGE = false;
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public static void main(final String[] args) {
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final int size = 100;
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// First display which renderer is tested:
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// JDK9 only:
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System.setProperty("sun.java2d.renderer.verbose", "true");
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System.out.println("FlipBitTest: size = " + size);
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final BufferedImage image = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);
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final Graphics2D g2d = (Graphics2D) image.getGraphics();
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try {
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g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
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g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_NORMALIZE);
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final AffineTransform at = new AffineTransform();
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at.setToScale(1, -1.01);
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g2d.setTransform(at);
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g2d.translate(0, -image.getHeight());
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g2d.setPaint(Color.WHITE);
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g2d.fill(new Rectangle(image.getWidth(), image.getHeight()));
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g2d.setPaint(Color.BLACK);
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g2d.setStroke(new BasicStroke(0.1f));
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g2d.draw(new Ellipse2D.Double(25, 25, 50, 50));
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if (SAVE_IMAGE) {
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try {
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final File file = new File("FlipBitTest.png");
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System.out.println("Writing file: " + file.getAbsolutePath());
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ImageIO.write(image, "PNG", file);
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} catch (IOException ex) {
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ex.printStackTrace();
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}
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}
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boolean nonWhitePixelFound = false;
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for (int x = 0; x < image.getWidth(); ++x) {
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if (image.getRGB(x, 50) != Color.WHITE.getRGB()) {
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nonWhitePixelFound = true;
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break;
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}
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}
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if (!nonWhitePixelFound) {
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throw new IllegalStateException("The ellipse was not drawn");
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}
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} finally {
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g2d.dispose();
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}
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}
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}
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