// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "flutter/display_list/display_list_matrix_clip_tracker.h"
#include "gtest/gtest.h"

namespace flutter {
namespace testing {

TEST(DisplayListMatrixClipTracker, Constructor) {
  const SkRect cull_rect = SkRect::MakeLTRB(20, 20, 60, 60);
  const SkMatrix matrix = SkMatrix::Scale(4, 4);
  const SkM44 m44 = SkM44::Scale(4, 4);
  const SkRect local_cull_rect = SkRect::MakeLTRB(5, 5, 15, 15);

  DisplayListMatrixClipTracker tracker1(cull_rect, matrix);
  DisplayListMatrixClipTracker tracker2(cull_rect, m44);

  ASSERT_FALSE(tracker1.using_4x4_matrix());
  ASSERT_EQ(tracker1.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker1.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker1.matrix_3x3(), matrix);
  ASSERT_EQ(tracker1.matrix_4x4(), m44);

  ASSERT_FALSE(tracker2.using_4x4_matrix());
  ASSERT_EQ(tracker2.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker2.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker2.matrix_3x3(), matrix);
  ASSERT_EQ(tracker2.matrix_4x4(), m44);
}

TEST(DisplayListMatrixClipTracker, Constructor4x4) {
  const SkRect cull_rect = SkRect::MakeLTRB(20, 20, 60, 60);
  // clang-format off
  const SkM44 m44 = SkM44(4, 0, 0.5, 0,
                          0, 4, 0.5, 0,
                          0, 0, 4.0, 0,
                          0, 0, 0.0, 1);
  // clang-format on
  const SkRect local_cull_rect = SkRect::MakeLTRB(5, 5, 15, 15);

  DisplayListMatrixClipTracker tracker(cull_rect, m44);

  ASSERT_TRUE(tracker.using_4x4_matrix());
  ASSERT_EQ(tracker.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker.matrix_4x4(), m44);
}

TEST(DisplayListMatrixClipTracker, TransformTo4x4) {
  const SkRect cull_rect = SkRect::MakeLTRB(20, 20, 60, 60);
  // clang-format off
  const SkM44 m44 = SkM44(4, 0, 0.5, 0,
                          0, 4, 0.5, 0,
                          0, 0, 4.0, 0,
                          0, 0, 0.0, 1);
  // clang-format on
  const SkRect local_cull_rect = SkRect::MakeLTRB(5, 5, 15, 15);

  DisplayListMatrixClipTracker tracker(cull_rect, SkMatrix::I());
  ASSERT_FALSE(tracker.using_4x4_matrix());

  tracker.transform(m44);
  ASSERT_TRUE(tracker.using_4x4_matrix());
  ASSERT_EQ(tracker.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker.matrix_4x4(), m44);
}

TEST(DisplayListMatrixClipTracker, SetTo4x4) {
  const SkRect cull_rect = SkRect::MakeLTRB(20, 20, 60, 60);
  // clang-format off
  const SkM44 m44 = SkM44(4, 0, 0.5, 0,
                          0, 4, 0.5, 0,
                          0, 0, 4.0, 0,
                          0, 0, 0.0, 1);
  // clang-format on
  const SkRect local_cull_rect = SkRect::MakeLTRB(5, 5, 15, 15);

  DisplayListMatrixClipTracker tracker(cull_rect, SkMatrix::I());
  ASSERT_FALSE(tracker.using_4x4_matrix());

  tracker.setTransform(m44);
  ASSERT_TRUE(tracker.using_4x4_matrix());
  ASSERT_EQ(tracker.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker.matrix_4x4(), m44);
}

TEST(DisplayListMatrixClipTracker, UpgradeTo4x4SaveAndRestore) {
  const SkRect cull_rect = SkRect::MakeLTRB(20, 20, 60, 60);
  // clang-format off
  const SkM44 m44 = SkM44(4, 0, 0.5, 0,
                          0, 4, 0.5, 0,
                          0, 0, 4.0, 0,
                          0, 0, 0.0, 1);
  // clang-format on
  const SkRect local_cull_rect = SkRect::MakeLTRB(5, 5, 15, 15);

  DisplayListMatrixClipTracker tracker(cull_rect, SkMatrix::I());
  ASSERT_FALSE(tracker.using_4x4_matrix());

  tracker.save();
  ASSERT_FALSE(tracker.using_4x4_matrix());

  tracker.transform(m44);
  ASSERT_TRUE(tracker.using_4x4_matrix());
  ASSERT_EQ(tracker.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker.matrix_4x4(), m44);

  tracker.restore();
  ASSERT_FALSE(tracker.using_4x4_matrix());
  ASSERT_EQ(tracker.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker.local_cull_rect(), cull_rect);
  ASSERT_EQ(tracker.matrix_4x4(), SkM44());
}

TEST(DisplayListMatrixClipTracker, Translate) {
  const SkRect cull_rect = SkRect::MakeLTRB(20, 20, 60, 60);
  const SkMatrix matrix = SkMatrix::Scale(4, 4);
  const SkM44 m44 = SkM44::Scale(4, 4);
  const SkMatrix translated_matrix =
      SkMatrix::Concat(matrix, SkMatrix::Translate(5, 1));
  const SkM44 translated_m44 = SkM44(translated_matrix);
  const SkRect local_cull_rect = SkRect::MakeLTRB(0, 4, 10, 14);

  DisplayListMatrixClipTracker tracker1(cull_rect, matrix);
  DisplayListMatrixClipTracker tracker2(cull_rect, m44);
  tracker1.translate(5, 1);
  tracker2.translate(5, 1);

  ASSERT_FALSE(tracker1.using_4x4_matrix());
  ASSERT_EQ(tracker1.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker1.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker1.matrix_3x3(), translated_matrix);
  ASSERT_EQ(tracker1.matrix_4x4(), translated_m44);

  ASSERT_FALSE(tracker2.using_4x4_matrix());
  ASSERT_EQ(tracker2.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker2.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker2.matrix_3x3(), translated_matrix);
  ASSERT_EQ(tracker2.matrix_4x4(), translated_m44);
}

TEST(DisplayListMatrixClipTracker, Scale) {
  const SkRect cull_rect = SkRect::MakeLTRB(20, 20, 60, 60);
  const SkMatrix matrix = SkMatrix::Scale(4, 4);
  const SkM44 m44 = SkM44::Scale(4, 4);
  const SkMatrix scaled_matrix =
      SkMatrix::Concat(matrix, SkMatrix::Scale(5, 2.5));
  const SkM44 scaled_m44 = SkM44(scaled_matrix);
  const SkRect local_cull_rect = SkRect::MakeLTRB(1, 2, 3, 6);

  DisplayListMatrixClipTracker tracker1(cull_rect, matrix);
  DisplayListMatrixClipTracker tracker2(cull_rect, m44);
  tracker1.scale(5, 2.5);
  tracker2.scale(5, 2.5);

  ASSERT_FALSE(tracker1.using_4x4_matrix());
  ASSERT_EQ(tracker1.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker1.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker1.matrix_3x3(), scaled_matrix);
  ASSERT_EQ(tracker1.matrix_4x4(), scaled_m44);

  ASSERT_FALSE(tracker2.using_4x4_matrix());
  ASSERT_EQ(tracker2.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker2.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker2.matrix_3x3(), scaled_matrix);
  ASSERT_EQ(tracker2.matrix_4x4(), scaled_m44);
}

TEST(DisplayListMatrixClipTracker, Skew) {
  const SkRect cull_rect = SkRect::MakeLTRB(20, 20, 60, 60);
  const SkMatrix matrix = SkMatrix::Scale(4, 4);
  const SkM44 m44 = SkM44::Scale(4, 4);
  const SkMatrix skewed_matrix =
      SkMatrix::Concat(matrix, SkMatrix::Skew(.25, 0));
  const SkM44 skewed_m44 = SkM44(skewed_matrix);
  const SkRect local_cull_rect = SkRect::MakeLTRB(1.25, 5, 13.75, 15);

  DisplayListMatrixClipTracker tracker1(cull_rect, matrix);
  DisplayListMatrixClipTracker tracker2(cull_rect, m44);
  tracker1.skew(.25, 0);
  tracker2.skew(.25, 0);

  ASSERT_FALSE(tracker1.using_4x4_matrix());
  ASSERT_EQ(tracker1.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker1.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker1.matrix_3x3(), skewed_matrix);
  ASSERT_EQ(tracker1.matrix_4x4(), skewed_m44);

  ASSERT_FALSE(tracker2.using_4x4_matrix());
  ASSERT_EQ(tracker2.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker2.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker2.matrix_3x3(), skewed_matrix);
  ASSERT_EQ(tracker2.matrix_4x4(), skewed_m44);
}

TEST(DisplayListMatrixClipTracker, Rotate) {
  const SkRect cull_rect = SkRect::MakeLTRB(20, 20, 60, 60);
  const SkMatrix matrix = SkMatrix::Scale(4, 4);
  const SkM44 m44 = SkM44::Scale(4, 4);
  const SkMatrix rotated_matrix =
      SkMatrix::Concat(matrix, SkMatrix::RotateDeg(90));
  const SkM44 rotated_m44 = SkM44(rotated_matrix);
  const SkRect local_cull_rect = SkRect::MakeLTRB(5, -15, 15, -5);

  DisplayListMatrixClipTracker tracker1(cull_rect, matrix);
  DisplayListMatrixClipTracker tracker2(cull_rect, m44);
  tracker1.rotate(90);
  tracker2.rotate(90);

  ASSERT_FALSE(tracker1.using_4x4_matrix());
  ASSERT_EQ(tracker1.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker1.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker1.matrix_3x3(), rotated_matrix);
  ASSERT_EQ(tracker1.matrix_4x4(), rotated_m44);

  ASSERT_FALSE(tracker2.using_4x4_matrix());
  ASSERT_EQ(tracker2.device_cull_rect(), cull_rect);
  ASSERT_EQ(tracker2.local_cull_rect(), local_cull_rect);
  ASSERT_EQ(tracker2.matrix_3x3(), rotated_matrix);
  ASSERT_EQ(tracker2.matrix_4x4(), rotated_m44);
}

}  // namespace testing
}  // namespace flutter