ui/views/examples/examples_skia_gold_pixel_diff.cc

// Copyright 2020 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 "ui/views/examples/examples_skia_gold_pixel_diff.h"

#include "base/run_loop.h"
#include "ui/snapshot/snapshot.h"
#include "ui/views/examples/examples_window.h"

#if defined(USE_AURA)
#include "ui/snapshot/snapshot_aura.h"
#endif

namespace views {
namespace examples {

ExamplesSkiaGoldPixelDiff::ExamplesSkiaGoldPixelDiff() = default;
ExamplesSkiaGoldPixelDiff::~ExamplesSkiaGoldPixelDiff() = default;

ExamplesExitCode ExamplesSkiaGoldPixelDiff::CompareScreenshot(
    const std::string& screenshot_name,
    const views::Widget* widget) const {
  base::RunLoop run_loop(base::RunLoop::Type::kNestableTasksAllowed);
  gfx::Rect widget_bounds = widget->GetRootView()->bounds();
#if defined(USE_AURA)
  ui::GrabWindowSnapshotAsyncAura(
#else
  ui::GrabWindowSnapshotAsync(
#endif
      widget->GetNativeWindow(), widget_bounds,
      base::BindOnce(
          [](gfx::Image* screenshot, base::OnceClosure quit_loop,
             gfx::Image image) {
            *screenshot = image;
            std::move(quit_loop).Run();
          },
          &screenshot_, run_loop.QuitClosure()));
  run_loop.Run();
  if (screenshot_.IsEmpty())
    return ExamplesExitCode::kImageEmpty;
  return ui::test::SkiaGoldPixelDiff::CompareScreenshot(
             screenshot_name, *screenshot_.ToSkBitmap())
             ? ExamplesExitCode::kSucceeded
             : ExamplesExitCode::kFailed;
}

void ExamplesSkiaGoldPixelDiff::DoScreenshot(views::Widget* widget) {
  result_ = CompareScreenshot("ExampleWindow", widget);
  widget->Close();
}

void ExamplesSkiaGoldPixelDiff::OnExamplesWindowShown(views::Widget* widget) {
  if (widget->GetName() == views::examples::kExamplesWidgetName) {
    DoScreenshot(widget);
  }
}

}  // namespace examples
}  // namespace views