kc3-lang/angle/util/fuchsia/ScenicWindow.cpp

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• Hash : a8c7e10f
  Author :
  Date : 2020-01-28T19:50:38
  

  Fuchsia: Switch ScenicWindow to use PresentOrReplaceView
  
  This avoids a deprecation warning:
  
  [01253.076] [WARNING:src/ui/bin/root_presenter/app.cc(109)] Using multiple presentations is deprecated. Call PresentOrReplaceView() to force replacement of current presentation.
  
  Bug: angleproject:4360
  Change-Id: Icb1898ee542bde8c26a2dcd55c783372fc8ae7c1
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2027935
  Commit-Queue: Michael Spang <spang@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• util/fuchsia/ScenicWindow.cpp

• //
  // Copyright 2019 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // ScenicWindow.cpp:
  //    Implements methods from ScenicWindow
  //
  
  #include "util/fuchsia/ScenicWindow.h"
  
  #include <fuchsia/images/cpp/fidl.h>
  #include <fuchsia/ui/views/cpp/fidl.h>
  #include <lib/async-loop/cpp/loop.h>
  #include <lib/async-loop/default.h>
  #include <lib/fdio/directory.h>
  #include <lib/fidl/cpp/interface_ptr.h>
  #include <lib/fidl/cpp/interface_request.h>
  #include <lib/ui/scenic/cpp/view_token_pair.h>
  #include <lib/zx/channel.h>
  #include <zircon/status.h>
  
  #include "common/debug.h"
  
  namespace
  {
  
  async::Loop *GetDefaultLoop()
  {
      static async::Loop *defaultLoop = new async::Loop(&kAsyncLoopConfigNeverAttachToThread);
      return defaultLoop;
  }
  
  zx::channel ConnectToServiceRoot()
  {
      zx::channel clientChannel;
      zx::channel serverChannel;
      zx_status_t result = zx::channel::create(0, &clientChannel, &serverChannel);
      ASSERT(result == ZX_OK);
      result = fdio_service_connect("/svc/.", serverChannel.release());
      ASSERT(result == ZX_OK);
      return clientChannel;
  }
  
  template <typename Interface>
  zx_status_t ConnectToService(zx_handle_t serviceRoot, fidl::InterfaceRequest<Interface> request)
  {
      ASSERT(request.is_valid());
      return fdio_service_connect_at(serviceRoot, Interface::Name_, request.TakeChannel().release());
  }
  
  template <typename Interface>
  fidl::InterfacePtr<Interface> ConnectToService(zx_handle_t serviceRoot,
                                                 async_dispatcher_t *dispatcher)
  {
      fidl::InterfacePtr<Interface> result;
      ConnectToService(serviceRoot, result.NewRequest(dispatcher));
      return result;
  }
  
  }  // namespace
  
  ScenicWindow::ScenicWindow()
      : mLoop(GetDefaultLoop()),
        mServiceRoot(ConnectToServiceRoot()),
        mScenic(
            ConnectToService<fuchsia::ui::scenic::Scenic>(mServiceRoot.get(), mLoop->dispatcher())),
        mPresenter(ConnectToService<fuchsia::ui::policy::Presenter>(mServiceRoot.get(),
                                                                    mLoop->dispatcher())),
        mScenicSession(mScenic.get(), mLoop->dispatcher()),
        mShape(&mScenicSession),
        mMaterial(&mScenicSession)
  {
      mScenicSession.set_error_handler(fit::bind_member(this, &ScenicWindow::onScenicError));
      mScenicSession.set_on_frame_presented_handler(
          fit::bind_member(this, &ScenicWindow::onFramePresented));
  }
  
  ScenicWindow::~ScenicWindow()
  {
      destroy();
  }
  
  bool ScenicWindow::initialize(const std::string &name, int width, int height)
  {
      // Set up scenic resources.
      mShape.SetShape(scenic::Rectangle(&mScenicSession, width, height));
      mShape.SetMaterial(mMaterial);
  
      fuchsia::ui::views::ViewToken viewToken;
      fuchsia::ui::views::ViewHolderToken viewHolderToken;
      std::tie(viewToken, viewHolderToken) = scenic::NewViewTokenPair();
  
      // Create view.
      mView = std::make_unique<scenic::View>(&mScenicSession, std::move(viewToken), name);
      mView->AddChild(mShape);
  
      // Present view.
      mPresenter->PresentOrReplaceView(std::move(viewHolderToken), nullptr);
  
      mWidth  = width;
      mHeight = height;
  
      resetNativeWindow();
  
      return true;
  }
  
  void ScenicWindow::destroy()
  {
      while (mInFlightPresents != 0 && !mLostSession)
      {
          mLoop->ResetQuit();
          mLoop->Run();
      }
  
      ASSERT(mInFlightPresents == 0 || mLostSession);
  
      mFuchsiaEGLWindow.reset();
  }
  
  void ScenicWindow::resetNativeWindow()
  {
      fuchsia::images::ImagePipe2Ptr imagePipe;
      uint32_t imagePipeId = mScenicSession.AllocResourceId();
      mScenicSession.Enqueue(
          scenic::NewCreateImagePipe2Cmd(imagePipeId, imagePipe.NewRequest(mLoop->dispatcher())));
      zx_handle_t imagePipeHandle = imagePipe.Unbind().TakeChannel().release();
  
      mMaterial.SetTexture(imagePipeId);
      mScenicSession.ReleaseResource(imagePipeId);
      present();
  
      mFuchsiaEGLWindow.reset(fuchsia_egl_window_create(imagePipeHandle, mWidth, mHeight));
  }
  
  EGLNativeWindowType ScenicWindow::getNativeWindow() const
  {
      return reinterpret_cast<EGLNativeWindowType>(mFuchsiaEGLWindow.get());
  }
  
  EGLNativeDisplayType ScenicWindow::getNativeDisplay() const
  {
      return EGL_DEFAULT_DISPLAY;
  }
  
  void ScenicWindow::messageLoop()
  {
      mLoop->ResetQuit();
      mLoop->RunUntilIdle();
  }
  
  void ScenicWindow::setMousePosition(int x, int y)
  {
      UNIMPLEMENTED();
  }
  
  bool ScenicWindow::setPosition(int x, int y)
  {
      UNIMPLEMENTED();
      return false;
  }
  
  bool ScenicWindow::resize(int width, int height)
  {
      mWidth  = width;
      mHeight = height;
  
      fuchsia_egl_window_resize(mFuchsiaEGLWindow.get(), width, height);
  
      return true;
  }
  
  void ScenicWindow::setVisible(bool isVisible) {}
  
  void ScenicWindow::signalTestEvent() {}
  
  void ScenicWindow::present()
  {
      while (mInFlightPresents >= kMaxInFlightPresents && !mLostSession)
      {
          mLoop->ResetQuit();
          mLoop->Run();
      }
  
      if (mLostSession)
      {
          return;
      }
  
      ASSERT(mInFlightPresents < kMaxInFlightPresents);
  
      ++mInFlightPresents;
      mScenicSession.Present2(0, 0, [](fuchsia::scenic::scheduling::FuturePresentationTimes info) {});
  }
  
  void ScenicWindow::onFramePresented(fuchsia::scenic::scheduling::FramePresentedInfo info)
  {
      mInFlightPresents -= info.presentation_infos.size();
      ASSERT(mInFlightPresents >= 0);
      mLoop->Quit();
  }
  
  void ScenicWindow::onScenicEvents(std::vector<fuchsia::ui::scenic::Event> events)
  {
      UNIMPLEMENTED();
  }
  
  void ScenicWindow::onScenicError(zx_status_t status)
  {
      WARN() << "OnScenicError: " << zx_status_get_string(status);
      mLostSession = true;
      mLoop->Quit();
  }
  
  // static
  OSWindow *OSWindow::New()
  {
      return new ScenicWindow;
  }
  

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