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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- package org.apache.fop.render.intermediate;
-
- import java.io.IOException;
-
- import org.junit.Test;
- import org.mockito.ArgumentCaptor;
-
- import static org.junit.Assert.assertEquals;
- import static org.junit.Assert.fail;
- import static org.mockito.Mockito.mock;
- import static org.mockito.Mockito.verify;
-
- public class ArcToBezierCurveTransformerTestCase {
-
- @Test
- public void arcTo() throws Exception {
- testArcTo(Math.PI / 3, Math.PI / 2, 100, 200, 1000, 1000);
- }
-
- private void testArcTo(double startAngle, double endAngle, int xCenter, int yCenter, int width,
- int height) throws IOException {
- assertAngleWithinFirstQuadrant(startAngle);
- assertAngleWithinFirstQuadrant(endAngle);
- BezierCurvePainter bezierCurvePainter = mock(BezierCurvePainter.class);
- ArcToBezierCurveTransformer sut = new ArcToBezierCurveTransformer(bezierCurvePainter);
- sut.arcTo(startAngle, endAngle, xCenter, yCenter, width, height);
- double tan1 = Math.tan(startAngle);
- double tan2 = Math.tan(endAngle);
- double lambda1 = Math.atan(height * tan1 / width);
- double lambda2 = Math.atan(height * tan2 / width);
- double xStart = width * Math.cos(lambda1) + xCenter;
- double yStart = height * Math.sin(lambda1) + yCenter;
- double xEnd = width * Math.cos(lambda2) + xCenter;
- double yEnd = height * Math.sin(lambda2) + yCenter;
- ArgumentCaptor<Integer> xP1Captor = ArgumentCaptor.forClass(Integer.class);
- ArgumentCaptor<Integer> yP1Captor = ArgumentCaptor.forClass(Integer.class);
- ArgumentCaptor<Integer> xP2Captor = ArgumentCaptor.forClass(Integer.class);
- ArgumentCaptor<Integer> yP2Captor = ArgumentCaptor.forClass(Integer.class);
- ArgumentCaptor<Integer> xP3Captor = ArgumentCaptor.forClass(Integer.class);
- ArgumentCaptor<Integer> yP3Captor = ArgumentCaptor.forClass(Integer.class);
- verify(bezierCurvePainter).cubicBezierTo(xP1Captor.capture(), yP1Captor.capture(),
- xP2Captor.capture(), yP2Captor.capture(), xP3Captor.capture(), yP3Captor.capture());
- int xP1 = xP1Captor.getValue();
- int yP1 = yP1Captor.getValue();
- int xP2 = xP2Captor.getValue();
- int yP2 = yP2Captor.getValue();
- int xP3 = xP3Captor.getValue();
- int yP3 = yP3Captor.getValue();
- // TODO do more than check the direction of the tangents at the end
- // points
- assertEquals((yP1 - yStart) / (xP1 - xStart), -width * width / height / height / tan1, 0.01);
- assertEquals((yP2 - yEnd) / (xP2 - xEnd), -width * width / height / height / tan2, 0.01);
- assertEquals((int) xEnd, xP3);
- assertEquals((int) yEnd, yP3);
- }
-
- private void assertAngleWithinFirstQuadrant(double angle) {
- if (angle <= 0 || angle > Math.PI / 2) {
- fail("Angle " + angle + " is in (0, " + Math.PI / 2 + ")");
- }
- }
- }
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