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// Copyright 2019 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 <utility>
#include "base/at_exit.h"
#include "base/command_line.h"
#include "base/i18n/icu_util.h"
#include "base/macros.h"
#include "base/message_loop/message_pump_type.h"
#include "base/run_loop.h"
#include "base/task/single_thread_task_executor.h"
#include "base/task/thread_pool/thread_pool_instance.h"
#include "base/threading/thread.h"
#include "build/build_config.h"
#include "components/viz/demo/host/demo_host.h"
#include "components/viz/demo/service/demo_service.h"
#include "mojo/core/embedder/embedder.h"
#include "mojo/core/embedder/scoped_ipc_support.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "ui/base/ui_base_features.h"
#include "ui/events/platform/platform_event_source.h"
#include "ui/platform_window/platform_window.h"
#include "ui/platform_window/platform_window_delegate.h"
#include "ui/platform_window/platform_window_init_properties.h"
#if defined(USE_OZONE)
#include "ui/ozone/public/ozone_platform.h"
#endif
#if defined(OS_WIN)
#include "ui/platform_window/win/win_window.h"
#endif
#if defined(USE_X11)
#include "ui/platform_window/x11/x11_window.h" // nogncheck
#endif
namespace {
// Initializes and owns the components from base necessary to run the app.
class InitBase {
public:
InitBase(int argc, char** argv) {
base::CommandLine::Init(argc, argv);
base::i18n::InitializeICU();
base::ThreadPoolInstance::CreateAndStartWithDefaultParams("demo");
}
~InitBase() = default;
private:
// The exit manager is in charge of calling the dtors of singleton objects.
base::AtExitManager exit_manager_;
base::SingleThreadTaskExecutor main_task_executor_{base::MessagePumpType::UI};
DISALLOW_COPY_AND_ASSIGN(InitBase);
};
// Initializes and owns mojo.
class InitMojo {
public:
InitMojo() : thread_("Mojo thread") {
mojo::core::Init();
thread_.StartWithOptions(
base::Thread::Options(base::MessagePumpType::IO, 0));
ipc_support_ = std::make_unique<mojo::core::ScopedIPCSupport>(
thread_.task_runner(),
mojo::core::ScopedIPCSupport::ShutdownPolicy::CLEAN);
}
~InitMojo() = default;
private:
base::Thread thread_;
std::unique_ptr<mojo::core::ScopedIPCSupport> ipc_support_;
DISALLOW_COPY_AND_ASSIGN(InitMojo);
};
// Initializes and owns the UI components needed for the app.
class InitUI {
public:
InitUI() {
#if defined(USE_X11)
if (!features::IsUsingOzonePlatform())
XInitThreads();
#endif
event_source_ = ui::PlatformEventSource::CreateDefault();
}
~InitUI() = default;
private:
std::unique_ptr<ui::PlatformEventSource> event_source_;
DISALLOW_COPY_AND_ASSIGN(InitUI);
};
// DemoWindow creates the native window for the demo app. The native window
// provides a gfx::AcceleratedWidget, which is needed for the display
// compositor.
class DemoWindow : public ui::PlatformWindowDelegate {
public:
DemoWindow() = default;
~DemoWindow() override = default;
void Create(const gfx::Rect& bounds) {
platform_window_ = CreatePlatformWindow(bounds);
platform_window_->Show();
if (widget_ != gfx::kNullAcceleratedWidget)
InitializeDemo();
}
private:
std::unique_ptr<ui::PlatformWindow> CreatePlatformWindow(
const gfx::Rect& bounds) {
ui::PlatformWindowInitProperties props(bounds);
#if defined(USE_X11) || defined(USE_OZONE)
#if defined(USE_OZONE)
if (features::IsUsingOzonePlatform()) {
return ui::OzonePlatform::GetInstance()->CreatePlatformWindow(
this, std::move(props));
}
#endif
#if defined(USE_X11)
auto x11_window = std::make_unique<ui::X11Window>(this);
x11_window->Initialize(std::move(props));
return x11_window;
#endif
NOTREACHED();
return nullptr;
#elif defined(OS_WIN)
return std::make_unique<ui::WinWindow>(this, props.bounds);
#else
NOTIMPLEMENTED();
return nullptr;
#endif
}
void InitializeDemo() {
DCHECK_NE(widget_, gfx::kNullAcceleratedWidget);
// We finally have a valid gfx::AcceleratedWidget. We can now start the
// actual process of setting up the viz host and the service.
// First, set up the mojo message-pipes that the host and the service will
// use to communicate with each other.
mojo::PendingRemote<viz::mojom::FrameSinkManager> frame_sink_manager;
mojo::PendingReceiver<viz::mojom::FrameSinkManager>
frame_sink_manager_receiver =
frame_sink_manager.InitWithNewPipeAndPassReceiver();
mojo::PendingRemote<viz::mojom::FrameSinkManagerClient>
frame_sink_manager_client;
mojo::PendingReceiver<viz::mojom::FrameSinkManagerClient>
frame_sink_manager_client_receiver =
frame_sink_manager_client.InitWithNewPipeAndPassReceiver();
// Next, create the host and the service, and pass them the right ends of
// the message-pipes.
host_ = std::make_unique<demo::DemoHost>(
widget_, platform_window_->GetBounds().size(),
std::move(frame_sink_manager_client_receiver),
std::move(frame_sink_manager));
service_ = std::make_unique<demo::DemoService>(
std::move(frame_sink_manager_receiver),
std::move(frame_sink_manager_client));
}
// ui::PlatformWindowDelegate:
void OnBoundsChanged(const gfx::Rect& new_bounds) override {
host_->Resize(new_bounds.size());
}
void OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget) override {
widget_ = widget;
if (platform_window_)
InitializeDemo();
}
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 OnAcceleratedWidgetDestroyed() override {}
void OnActivationChanged(bool active) override {}
void OnMouseEnter() override {}
std::unique_ptr<demo::DemoHost> host_;
std::unique_ptr<demo::DemoService> service_;
std::unique_ptr<ui::PlatformWindow> platform_window_;
gfx::AcceleratedWidget widget_;
DISALLOW_COPY_AND_ASSIGN(DemoWindow);
};
int DemoMain() {
DemoWindow window;
window.Create(gfx::Rect(800, 600));
base::RunLoop().Run();
return 0;
}
} // namespace
int main(int argc, char** argv) {
InitBase base(argc, argv);
InitMojo mojo;
InitUI ui;
return DemoMain();
}
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