149 lines
5.3 KiB
Java
149 lines
5.3 KiB
Java
/*
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* Copyright (c) 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.geom.Path2D;
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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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* Clip rendering test
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*
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* @test
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* @bug 8297230
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* @summary verify that huge polygon is properly rasterized
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*/
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public class HugePolygonClipTest {
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private static final double LARGE_X_COORDINATE = 4194304.250;
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private static final int SCENE_WIDTH = 600;
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private static final int SCENE_HEIGHT = 400;
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private static final float WIDTH = 2.73f;
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private static final int G_MASK = 0x0000ff00;
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private static final int R_MASK = 0x00ff0000;
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private static final int RGB_MASK = 0x00ffffff;
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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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// 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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// enable Marlin logging:
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System.setProperty("sun.java2d.renderer.log", "true");
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System.setProperty("sun.java2d.renderer.clip", "true");
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System.setProperty("sun.java2d.renderer.subPixel_log2_X", "8");
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System.out.println("HugePolygonClipTest: size = " + SCENE_WIDTH + " x " + SCENE_HEIGHT);
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final BufferedImage image = new BufferedImage(SCENE_WIDTH, SCENE_HEIGHT, BufferedImage.TYPE_INT_ARGB);
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final Graphics2D g2d = (Graphics2D) image.getGraphics();
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try {
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g2d.setBackground(Color.BLACK);
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g2d.clearRect(0, 0, SCENE_WIDTH, SCENE_HEIGHT);
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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_PURE);
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// original test case => large moveTo in Filler but no bug in Stroker:
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double longWidth = LARGE_X_COORDINATE + SCENE_WIDTH + 0.001;
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final Path2D veryWidePolygon = new Path2D.Double();
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veryWidePolygon.moveTo(longWidth, 50.0);
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veryWidePolygon.lineTo(longWidth, 100.0);
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veryWidePolygon.lineTo(0.0, 100.0);
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veryWidePolygon.lineTo(0.0, 0.0);
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veryWidePolygon.closePath();
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g2d.translate(-longWidth + SCENE_WIDTH, 100.0);
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g2d.setPaint(Color.RED);
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g2d.fill(veryWidePolygon);
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g2d.setPaint(Color.GREEN);
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g2d.setStroke(new BasicStroke(WIDTH));
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g2d.draw(veryWidePolygon);
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if (SAVE_IMAGE) {
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try {
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final File file = new File("TestHugePolygonCoords.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 int x = SCENE_WIDTH / 2;
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checkColumn(image, x, SCENE_HEIGHT);
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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 checkColumn(final BufferedImage image, final int x, final int maxY) {
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boolean trigger = false;
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boolean inside = false;
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for (int y = 0; y < maxY; y++) {
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final int rgb = image.getRGB(x, y);
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// System.out.println("pixel at (" + x + ", " + y + ") = " + rgb);
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if ((rgb & G_MASK) != 0) {
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if (!trigger) {
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trigger = true;
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inside = !inside;
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// System.out.println("inside: "+inside);
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}
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} else {
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trigger = false;
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final int mask = (inside) ? R_MASK : RGB_MASK;
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final int expected = (rgb & mask);
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// System.out.println("pix[" + y + "] = " + expected + " inside: " + inside);
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if ((inside && (expected == 0))
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|| (!inside && (expected != 0))) {
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throw new IllegalStateException("bad pixel at (" + x + ", " + y
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+ ") = " + expected + " inside: " + inside);
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}
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}
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}
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}
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}
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