1 /* 2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.javafx.sg.prism; 27 28 import com.sun.javafx.geom.RectBounds; 29 import com.sun.prism.paint.Color; 30 import org.junit.Before; 31 import org.junit.Test; 32 import static org.junit.Assert.assertEquals; 33 import static org.junit.Assert.assertFalse; 34 import static org.junit.Assert.assertNotNull; 35 import static org.junit.Assert.assertTrue; 36 37 /** 38 */ 39 public class NGCircleTest extends NGTestBase { 40 41 NGCircle circle; 42 43 @Before public void setup() { 44 circle = new NGCircle(); 45 circle.setFillPaint(Color.RED); 46 circle.updateCircle(10, 10, 5); 47 } 48 49 @Test 50 public void testSupportsOpaqueRegion() { 51 assertTrue(circle.supportsOpaqueRegions()); 52 } 53 54 @Test 55 public void hasOpaqueRegionIfRadiusIsGreaterThanZero() { 56 assertTrue(circle.hasOpaqueRegion()); 57 circle.updateCircle(10, 10, 0); 58 assertFalse(circle.hasOpaqueRegion()); 59 circle.updateCircle(10, 10, .0001f); 60 assertTrue(circle.hasOpaqueRegion()); 61 } 62 63 @Test 64 public void opaqueRegionLiesWithinCircle() { 65 RectBounds or = new RectBounds(); 66 // Just sort of try a range of values. They should all be good. 67 final float[] radiusValues = new float[] { 68 .001f, 69 1f/3f, 70 (float) Math.E, 71 (float) Math.PI, 72 10f, 73 13.321f // some random number 74 }; 75 for (float r : radiusValues) { 76 circle.updateCircle(10, 10, r); 77 or = circle.computeOpaqueRegion(or); 78 assertNotNull(or); 79 assertTrue(circle.getShape().contains(or.getMinX(), or.getMinY(), or.getWidth(), or.getHeight())); 80 } 81 } 82 83 /** 84 * Perform a simple test to be sure that the opaque region is just 85 * about as large as it could possibly be without going outside the 86 * bounds of the ellipse. This is basically using the same math as 87 * the implementation, except that we use the more precise math here 88 * than what the implementation uses. So I will compute the wider box 89 * and a narrower box and make sure the implementation is between the two. 90 */ 91 @Test 92 public void testComputeOpaqueRegion() { 93 RectBounds or = circle.computeOpaqueRegion(new RectBounds()); 94 95 // First we will compute with the highest precision we can. 96 float r = 5; // same as the ellipse 97 float side = 2*r / (float) Math.sqrt(2); 98 float halfSide = side / 2f; 99 float x1 = 10 - halfSide; // centerX = 10 100 float y1 = 10 - halfSide; // centerY = 10 101 float x2 = 10 + halfSide; 102 float y2 = 10 + halfSide; 103 // Less than really accurate 104 assertTrue(x1 < or.getMinX()); 105 assertTrue(y1 < or.getMinY()); 106 assertTrue(x2 > or.getMaxX()); 107 assertTrue(y2 > or.getMaxY()); 108 // But not too far off 109 assertEquals(x1, or.getMinX(), .1f); 110 assertEquals(y1, or.getMinY(), .1f); 111 assertEquals(x2, or.getMaxX(), .1f); 112 assertEquals(y2, or.getMaxY(), .1f); 113 114 } 115 }