// Copyright 2014 The Chromium 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 "content/browser/compositor/software_output_device_ozone.h"

#include <memory>

#include "base/macros.h"
#include "base/message_loop/message_loop.h"
#include "base/thread_task_runner_handle.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "ui/compositor/compositor.h"
#include "ui/compositor/test/context_factories_for_test.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/skia_util.h"
#include "ui/gfx/vsync_provider.h"
#include "ui/gl/gl_implementation.h"
#include "ui/ozone/public/ozone_platform.h"
#include "ui/ozone/public/surface_ozone_canvas.h"
#include "ui/platform_window/platform_window.h"
#include "ui/platform_window/platform_window_delegate.h"

namespace {

class TestPlatformWindowDelegate : public ui::PlatformWindowDelegate {
 public:
  TestPlatformWindowDelegate() : widget_(gfx::kNullAcceleratedWidget) {}
  ~TestPlatformWindowDelegate() override {}

  gfx::AcceleratedWidget GetAcceleratedWidget() const { return widget_; }

  // ui::PlatformWindowDelegate:
  void OnBoundsChanged(const gfx::Rect& new_bounds) override {}
  void OnDamageRect(const gfx::Rect& damaged_region) override {}
  void DispatchEvent(ui::Event* event) override {}
  void OnCloseRequest() override {}
  void OnClosed() override {}
  void OnWindowStateChanged(ui::PlatformWindowState new_state) override {}
  void OnLostCapture() override {}
  void OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget,
                                    float device_pixel_ratio) override {
    widget_ = widget;
  }
  void OnAcceleratedWidgetDestroyed() override {
    NOTREACHED();
  }
  void OnActivationChanged(bool active) override {}

 private:
  gfx::AcceleratedWidget widget_;

  DISALLOW_COPY_AND_ASSIGN(TestPlatformWindowDelegate);
};

}  // namespace

class SoftwareOutputDeviceOzoneTest : public testing::Test {
 public:
  SoftwareOutputDeviceOzoneTest();
  ~SoftwareOutputDeviceOzoneTest() override;

  void SetUp() override;
  void TearDown() override;

 protected:
  std::unique_ptr<content::SoftwareOutputDeviceOzone> output_device_;
  bool enable_pixel_output_;

 private:
  std::unique_ptr<ui::Compositor> compositor_;
  std::unique_ptr<base::MessageLoop> message_loop_;
  TestPlatformWindowDelegate window_delegate_;
  std::unique_ptr<ui::PlatformWindow> window_;

  DISALLOW_COPY_AND_ASSIGN(SoftwareOutputDeviceOzoneTest);
};

SoftwareOutputDeviceOzoneTest::SoftwareOutputDeviceOzoneTest()
    : enable_pixel_output_(false) {
  message_loop_.reset(new base::MessageLoopForUI);
}

SoftwareOutputDeviceOzoneTest::~SoftwareOutputDeviceOzoneTest() {
}

void SoftwareOutputDeviceOzoneTest::SetUp() {
  ui::ContextFactory* context_factory =
      ui::InitializeContextFactoryForTests(enable_pixel_output_);

  const gfx::Size size(500, 400);
  window_ = ui::OzonePlatform::GetInstance()->CreatePlatformWindow(
      &window_delegate_, gfx::Rect(size));
  compositor_.reset(
      new ui::Compositor(context_factory, base::ThreadTaskRunnerHandle::Get()));
  compositor_->SetAcceleratedWidget(window_delegate_.GetAcceleratedWidget());
  compositor_->SetScaleAndSize(1.0f, size);

  output_device_ =
      content::SoftwareOutputDeviceOzone::Create(compositor_.get());
  if (output_device_)
    output_device_->Resize(size, 1.f);
}

void SoftwareOutputDeviceOzoneTest::TearDown() {
  output_device_.reset();
  compositor_.reset();
  window_.reset();
  ui::TerminateContextFactoryForTests();
}

class SoftwareOutputDeviceOzonePixelTest
    : public SoftwareOutputDeviceOzoneTest {
 protected:
  void SetUp() override;
};

void SoftwareOutputDeviceOzonePixelTest::SetUp() {
  enable_pixel_output_ = true;
  SoftwareOutputDeviceOzoneTest::SetUp();
}

TEST_F(SoftwareOutputDeviceOzoneTest, CheckCorrectResizeBehavior) {
  // Check if software rendering mode is not supported.
  if (!output_device_)
    return;

  gfx::Rect damage(0, 0, 100, 100);
  gfx::Size size(200, 100);
  // Reduce size.
  output_device_->Resize(size, 1.f);

  SkCanvas* canvas = output_device_->BeginPaint(damage);
  gfx::Size canvas_size(canvas->getBaseLayerSize().width(),
                        canvas->getBaseLayerSize().height());
  EXPECT_EQ(size.ToString(), canvas_size.ToString());

  size.SetSize(1000, 500);
  // Increase size.
  output_device_->Resize(size, 1.f);

  canvas = output_device_->BeginPaint(damage);
  canvas_size.SetSize(canvas->getBaseLayerSize().width(),
                      canvas->getBaseLayerSize().height());
  EXPECT_EQ(size.ToString(), canvas_size.ToString());

}