145 lines
4.6 KiB
Java
145 lines
4.6 KiB
Java
/*
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* Copyright (c) 2018, 2022, 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.RenderingHints;
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import java.awt.image.BufferedImage;
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import java.awt.image.Raster;
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import java.io.File;
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import java.io.IOException;
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import java.util.Arrays;
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import javax.imageio.ImageIO;
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/**
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* Simple Dashed Rect rendering test
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*
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* @test
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* @summary verify that dashed rectangle is properly rasterized
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* @bug 8202580
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*/
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public class DashedRectTest {
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static final boolean SAVE_IMAGE = false;
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private final static int N = 10;
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final static float DASH_LEN = 3.0f;
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final static float DASH_PH = 5000f;
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final static int MAX = 100;
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public static void main(String[] args) {
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final int size = 200;
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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("DashedRectTest: 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_OFF);
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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_PURE);
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g2d.setClip(0, 0, size, size);
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g2d.setBackground(Color.WHITE);
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g2d.clearRect(0, 0, size, size);
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// Corrupt Marlin Dasher.dash cached array:
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g2d.setColor(Color.RED);
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g2d.setStroke(createBadStroke());
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g2d.drawRect(20, 20, 50, 50);
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g2d.setStroke(createStroke());
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g2d.setColor(Color.BLUE);
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for (int i = 0; i < N; i++) {
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final long start = System.nanoTime();
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g2d.drawRect(5, 5, MAX, MAX);
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final long time = System.nanoTime() - start;
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System.out.println("paint: duration= " + (1e-6 * time) + " ms.");
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}
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if (SAVE_IMAGE) {
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try {
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final File file = new File("DashedRectTest-MAX-" + MAX + "-dashed.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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// Check image on few pixels:
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final Raster raster = image.getData();
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// 10, 5 = blue
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checkPixel(raster, 10, 5, Color.BLUE.getRGB());
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} finally {
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g2d.dispose();
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}
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}
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private static void checkPixel(final Raster raster,
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final int x, final int y,
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final int expected) {
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final int[] rgb = (int[]) raster.getDataElements(x, y, null);
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if (rgb[0] != expected) {
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throw new IllegalStateException("bad pixel at (" + x + ", " + y
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+ ") = " + rgb[0] + " expected: " + expected);
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}
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}
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private static BasicStroke createStroke() {
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return new BasicStroke(2f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_MITER, 10.0f,
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new float[]{DASH_LEN}, DASH_PH) {
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};
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}
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private static BasicStroke createBadStroke() {
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final float[] dash = new float[100];
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Arrays.fill(dash, 19.333f);
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return new BasicStroke(2f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_MITER, 10.0f, dash, DASH_PH);
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}
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}
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