/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "gtest/gtest.h"

#include "PolygonTestUtils.h"

#include "nsTArray.h"

#include "Point.h"

#include "Polygon.h"

#include "Triangle.h"

using namespace mozilla::gfx;

typedef mozilla::gfx::Polygon MozPolygon;

TEST(MozPolygon, TriangulateRectangle)

{

  const MozPolygon p {

    Point4D(0.0f, 0.0f, 1.0f, 1.0f),

    Point4D(0.0f, 1.0f, 1.0f, 1.0f),

    Point4D(1.0f, 1.0f, 1.0f, 1.0f),

    Point4D(1.0f, 0.0f, 1.0f, 1.0f)

  };

  const nsTArray<Triangle> triangles = p.ToTriangles();

  const nsTArray<Triangle> expected = {

    Triangle(Point(0.0f, 0.0f), Point(0.0f, 1.0f), Point(1.0f, 1.0f)),

    Triangle(Point(0.0f, 0.0f), Point(1.0f, 1.0f), Point(1.0f, 0.0f))

  };

  AssertArrayEQ(triangles, expected);

}

TEST(MozPolygon, TriangulatePentagon)

{

  const MozPolygon p {

    Point4D(0.0f, 0.0f, 1.0f, 1.0f),

    Point4D(0.0f, 1.0f, 1.0f, 1.0f),

    Point4D(0.5f, 1.5f, 1.0f, 1.0f),

    Point4D(1.0f, 1.0f, 1.0f, 1.0f),

    Point4D(1.0f, 0.0f, 1.0f, 1.0f)

  };

  const nsTArray<Triangle> triangles = p.ToTriangles();

  const nsTArray<Triangle> expected = {

    Triangle(Point(0.0f, 0.0f), Point(0.0f, 1.0f), Point(0.5f, 1.5f)),

    Triangle(Point(0.0f, 0.0f), Point(0.5f, 1.5f), Point(1.0f, 1.0f)),

    Triangle(Point(0.0f, 0.0f), Point(1.0f, 1.0f), Point(1.0f, 0.0f))

  };

  AssertArrayEQ(triangles, expected);

}

void

TestClipRect(const MozPolygon& aPolygon,

             const MozPolygon& aExpected,

             const Rect& aRect)

{

  const MozPolygon res = aPolygon.ClipPolygon(MozPolygon::FromRect(aRect));

  EXPECT_TRUE(res == aExpected);

}

TEST(MozPolygon, ClipRectangle)

{

  MozPolygon polygon {

    Point4D(0.0f, 0.0f, 0.0f, 1.0f),

    Point4D(0.0f, 1.0f, 0.0f, 1.0f),

    Point4D(1.0f, 1.0f, 0.0f, 1.0f),

    Point4D(1.0f, 0.0f, 0.0f, 1.0f)

  };

  TestClipRect(polygon, polygon, Rect(0.0f, 0.0f, 1.0f, 1.0f));

  MozPolygon expected = MozPolygon {

    Point4D(0.0f, 0.0f, 0.0f, 1.0f),

    Point4D(0.0f, 0.8f, 0.0f, 1.0f),

    Point4D(0.8f, 0.8f, 0.0f, 1.0f),

    Point4D(0.8f, 0.0f, 0.0f, 1.0f)

  };

  TestClipRect(polygon, expected, Rect(0.0f, 0.0f, 0.8f, 0.8f));

  expected = MozPolygon {

    Point4D(0.2f, 0.2f, 0.0f, 1.0f),

    Point4D(0.2f, 1.0f, 0.0f, 1.0f),

    Point4D(1.0f, 1.0f, 0.0f, 1.0f),

    Point4D(1.0f, 0.2f, 0.0f, 1.0f)

  };

  TestClipRect(polygon, expected, Rect(0.2f, 0.2f, 0.8f, 0.8f));

  expected = MozPolygon {

    Point4D(0.2f, 0.2f, 0.0f, 1.0f),

    Point4D(0.2f, 0.8f, 0.0f, 1.0f),

    Point4D(0.8f, 0.8f, 0.0f, 1.0f),

    Point4D(0.8f, 0.2f, 0.0f, 1.0f)

  };

  TestClipRect(polygon, expected, Rect(0.2f, 0.2f, 0.6f, 0.6f));

}

TEST(MozPolygon, ClipTriangle)

{

  MozPolygon clipped, expected;

  const MozPolygon polygon {

    Point4D(0.0f, 0.0f, 0.0f, 1.0f),

    Point4D(0.0f, 1.0f, 0.0f, 1.0f),

    Point4D(1.0f, 1.0f, 0.0f, 1.0f)

  };

  expected = MozPolygon {

    Point4D(0.0f, 0.0f, 0.0f, 1.0f),

    Point4D(0.0f, 1.0f, 0.0f, 1.0f),

    Point4D(1.0f, 1.0f, 0.0f, 1.0f)

  };

  TestClipRect(polygon, expected, Rect(0.0f, 0.0f, 1.0f, 1.0f));

  expected = MozPolygon {

    Point4D(0.0f, 0.0f, 0.0f, 1.0f),

    Point4D(0.0f, 0.8f, 0.0f, 1.0f),

    Point4D(0.8f, 0.8f, 0.0f, 1.0f)

  };

  TestClipRect(polygon, expected, Rect(0.0f, 0.0f, 0.8f, 0.8f));

  expected = MozPolygon {

    Point4D(0.2f, 0.2f, 0.0f, 1.0f),

    Point4D(0.2f, 1.0f, 0.0f, 1.0f),

    Point4D(1.0f, 1.0f, 0.0f, 1.0f)

  };

  TestClipRect(polygon, expected, Rect(0.2f, 0.2f, 0.8f, 0.8f));

  expected = MozPolygon {

    Point4D(0.2f, 0.2f, 0.0f, 1.0f),

    Point4D(0.2f, 0.8f, 0.0f, 1.0f),

    Point4D(0.8f, 0.8f, 0.0f, 1.0f)

  };

  TestClipRect(polygon, expected, Rect(0.2f, 0.2f, 0.6f, 0.6f));

}