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/*
* Copyright (c) 2022, 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.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Path2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
/**
* Clip rendering test
*
* @test
* @bug 8297230
* @summary verify that huge polygon is properly rasterized
*/
public class HugePolygonClipTest {
private static final double LARGE_X_COORDINATE = 4194304.250;
private static final int SCENE_WIDTH = 600;
private static final int SCENE_HEIGHT = 400;
private static final float WIDTH = 2.73f;
private static final int G_MASK = 0x0000ff00;
private static final int R_MASK = 0x00ff0000;
private static final int RGB_MASK = 0x00ffffff;
static final boolean SAVE_IMAGE = false;
public static void main(final String[] args) {
// First display which renderer is tested:
// JDK9 only:
System.setProperty("sun.java2d.renderer.verbose", "true");
// enable Marlin logging:
System.setProperty("sun.java2d.renderer.log", "true");
System.setProperty("sun.java2d.renderer.clip", "true");
System.setProperty("sun.java2d.renderer.subPixel_log2_X", "8");
System.out.println("HugePolygonClipTest: size = " + SCENE_WIDTH + " x " + SCENE_HEIGHT);
final BufferedImage image = new BufferedImage(SCENE_WIDTH, SCENE_HEIGHT, BufferedImage.TYPE_INT_ARGB);
final Graphics2D g2d = (Graphics2D) image.getGraphics();
try {
g2d.setBackground(Color.BLACK);
g2d.clearRect(0, 0, SCENE_WIDTH, SCENE_HEIGHT);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
// original test case => large moveTo in Filler but no bug in Stroker:
double longWidth = LARGE_X_COORDINATE + SCENE_WIDTH + 0.001;
final Path2D veryWidePolygon = new Path2D.Double();
veryWidePolygon.moveTo(longWidth, 50.0);
veryWidePolygon.lineTo(longWidth, 100.0);
veryWidePolygon.lineTo(0.0, 100.0);
veryWidePolygon.lineTo(0.0, 0.0);
veryWidePolygon.closePath();
g2d.translate(-longWidth + SCENE_WIDTH, 100.0);
g2d.setPaint(Color.RED);
g2d.fill(veryWidePolygon);
g2d.setPaint(Color.GREEN);
g2d.setStroke(new BasicStroke(WIDTH));
g2d.draw(veryWidePolygon);
if (SAVE_IMAGE) {
try {
final File file = new File("TestHugePolygonCoords.png");
System.out.println("Writing file: " + file.getAbsolutePath());
ImageIO.write(image, "PNG", file);
} catch (IOException ex) {
ex.printStackTrace();
}
}
// Check image on few pixels:
final int x = SCENE_WIDTH / 2;
checkColumn(image, x, SCENE_HEIGHT);
} finally {
g2d.dispose();
}
}
private static void checkColumn(final BufferedImage image, final int x, final int maxY) {
boolean trigger = false;
boolean inside = false;
for (int y = 0; y < maxY; y++) {
final int rgb = image.getRGB(x, y);
// System.out.println("pixel at (" + x + ", " + y + ") = " + rgb);
if ((rgb & G_MASK) != 0) {
if (!trigger) {
trigger = true;
inside = !inside;
// System.out.println("inside: "+inside);
}
} else {
trigger = false;
final int mask = (inside) ? R_MASK : RGB_MASK;
final int expected = (rgb & mask);
// System.out.println("pix[" + y + "] = " + expected + " inside: " + inside);
if ((inside && (expected == 0))
|| (!inside && (expected != 0))) {
throw new IllegalStateException("bad pixel at (" + x + ", " + y
+ ") = " + expected + " inside: " + inside);
}
}
}
}
}
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