First version of the iphone client that actually works, for at least a subset

[zxing.git] / cpp / core / tests / src / common / PerspectiveTransformTest.cpp

diff --git a/cpp/core/tests/src/common/PerspectiveTransformTest.cpp b/cpp/core/tests/src/common/PerspectiveTransformTest.cpp
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+++ b/cpp/core/tests/src/common/PerspectiveTransformTest.cpp
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+/*
+ *  PerspectiveTransformTest.cpp
+ *  zxing
+ *
+ *  Created by Christian Brunschen on 12/05/2008.
+ *  Copyright 2008 Google UK. All rights reserved.
+ *
+ * Licensed 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.
+ */
+
+#include "PerspectiveTransformTest.h"
+
+namespace common {
+  
+  static float EPSILON = 0.0001f;
+  
+  CPPUNIT_TEST_SUITE_REGISTRATION(PerspectiveTransformTest);
+  
+  void PerspectiveTransformTest::testSquareToQuadrilateral() {
+    Ref<PerspectiveTransform> pt
+      (PerspectiveTransform::squareToQuadrilateral
+       (2.0f, 3.0f, 10.0f, 4.0f, 16.0f, 15.0f, 4.0f, 9.0f));
+    assertPointEquals(2.0f, 3.0f, 0.0f, 0.0f, pt);
+    assertPointEquals(10.0f, 4.0f, 1.0f, 0.0f, pt);
+    assertPointEquals(4.0f, 9.0f, 0.0f, 1.0f, pt);
+    assertPointEquals(16.0f, 15.0f, 1.0f, 1.0f, pt);
+    assertPointEquals(6.535211f, 6.8873234f, 0.5f, 0.5f, pt);
+    assertPointEquals(48.0f, 42.42857f, 1.5f, 1.5f, pt);
+  }
+  
+  void PerspectiveTransformTest::testQuadrilateralToQuadrilateral() {
+    Ref<PerspectiveTransform> pt
+    (PerspectiveTransform::quadrilateralToQuadrilateral
+     (2.0f, 3.0f, 10.0f, 4.0f, 16.0f, 15.0f, 4.0f, 9.0f,
+      103.0f, 110.0f, 300.0f, 120.0f, 290.0f, 270.0f, 150.0f, 280.0f));
+    assertPointEquals(103.0f, 110.0f, 2.0f, 3.0f, pt);
+    assertPointEquals(300.0f, 120.0f, 10.0f, 4.0f, pt);
+    assertPointEquals(290.0f, 270.0f, 16.0f, 15.0f, pt);
+    assertPointEquals(150.0f, 280.0f, 4.0f, 9.0f, pt);
+    assertPointEquals(7.1516876f, -64.60185f, 0.5f, 0.5f, pt);
+    assertPointEquals(328.09116f, 334.16385f, 50.0f, 50.0f, pt);
+  }
+
+  void PerspectiveTransformTest::assertPointEquals(float expectedX, 
+                                                   float expectedY, 
+                                                   float sourceX, 
+                                                   float sourceY, 
+                                                   Ref<PerspectiveTransform> pt) {
+    valarray<float> points(2);
+    points[0] = sourceX;
+    points[1] = sourceY;
+    pt->transformPoints(points);
+    CPPUNIT_ASSERT_DOUBLES_EQUAL(expectedX, points[0], EPSILON);
+    CPPUNIT_ASSERT_DOUBLES_EQUAL(expectedY, points[1], EPSILON);
+    
+  }
+                                
+}