/*
 *  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 zxing {
using namespace std;

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) {
  vector<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);

}

}