kc3-lang/angle/util/linux/wayland/WaylandWindow.cpp

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• Hash : 9ad43bdd
  Author :
  Date : 2021-12-09T16:52:35
  

  Re-land: "Vulkan: Support Wayland"
  
  Implement DisplayVkWayland and WindowSurfaceVkWayland. Get window size
  from native window and check egl config is just empty. An EGL wayland
  test is added for testing rendering and buffers swapping.
  
  Re-land fixes:
  - link failure in systems with no libwayland installed.
  - XCB display availability check.
  
  Bug: angleproject:6902
  Change-Id: I5daecf3591493308ac71a7dd3bc0802f492e6fed
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3621059
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• util/linux/wayland/WaylandWindow.cpp

• //
  // Copyright 2022 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.
  //
  
  // WaylandWindow.cpp: Implementation of OSWindow for Wayland
  
  #include "util/linux/wayland/WaylandWindow.h"
  
  WaylandWindow::WaylandWindow()
      : mDisplay{nullptr}, mCompositor{nullptr}, mSurface{nullptr}, mWindow{nullptr}
  {}
  
  WaylandWindow::~WaylandWindow()
  {
      destroy();
  }
  
  void WaylandWindow::RegistryHandleGlobal(void *data,
                                           struct wl_registry *registry,
                                           uint32_t name,
                                           const char *interface,
                                           uint32_t version)
  {
      WaylandWindow *vc = reinterpret_cast<WaylandWindow *>(data);
  
      if (strcmp(interface, "wl_compositor") == 0)
      {
          void *compositor = wl_registry_bind(registry, name, &wl_compositor_interface, 1);
          vc->mCompositor  = reinterpret_cast<wl_compositor *>(compositor);
      }
  }
  
  void WaylandWindow::RegistryHandleGlobalRemove(void *data,
                                                 struct wl_registry *registry,
                                                 uint32_t name)
  {}
  
  const struct wl_registry_listener WaylandWindow::registryListener = {
      WaylandWindow::RegistryHandleGlobal, WaylandWindow::RegistryHandleGlobalRemove};
  
  bool WaylandWindow::initializeImpl(const std::string &name, int width, int height)
  {
      destroy();
  
      if (!mDisplay)
      {
          mDisplay = wl_display_connect(nullptr);
          if (!mDisplay)
          {
              return false;
          }
      }
  
      // Not get a window
      struct wl_registry *registry = wl_display_get_registry(mDisplay);
      wl_registry_add_listener(registry, &registryListener, this);
  
      // Round-trip to get globals
      wl_display_roundtrip(mDisplay);
      if (!mCompositor)
      {
          return false;
      }
  
      // We don't need this anymore
      wl_registry_destroy(registry);
  
      mSurface = wl_compositor_create_surface(mCompositor);
      if (!mSurface)
      {
          return false;
      }
  
      mWindow = wl_egl_window_create(mSurface, width, height);
      if (!mWindow)
      {
          return false;
      }
  
      fds[0] = {wl_display_get_fd(mDisplay), POLLIN, 0};
  
      mY      = 0;
      mX      = 0;
      mWidth  = width;
      mHeight = height;
  
      return true;
  }
  
  void WaylandWindow::disableErrorMessageDialog() {}
  
  void WaylandWindow::destroy()
  {
      if (mWindow)
      {
          wl_egl_window_destroy(mWindow);
          mWindow = nullptr;
      }
  
      if (mSurface)
      {
          wl_surface_destroy(mSurface);
          mSurface = nullptr;
      }
  
      if (mCompositor)
      {
          wl_compositor_destroy(mCompositor);
          mCompositor = nullptr;
      }
  }
  
  void WaylandWindow::resetNativeWindow() {}
  
  EGLNativeWindowType WaylandWindow::getNativeWindow() const
  {
      return reinterpret_cast<EGLNativeWindowType>(mWindow);
  }
  
  EGLNativeDisplayType WaylandWindow::getNativeDisplay() const
  {
      return reinterpret_cast<EGLNativeDisplayType>(mDisplay);
  }
  
  void WaylandWindow::messageLoop()
  {
      while (wl_display_prepare_read(mDisplay) != 0)
          wl_display_dispatch_pending(mDisplay);
      if (wl_display_flush(mDisplay) < 0 && errno != EAGAIN)
      {
          wl_display_cancel_read(mDisplay);
          return;
      }
      if (poll(fds, 1, 0) > 0)
      {
          wl_display_read_events(mDisplay);
          wl_display_dispatch_pending(mDisplay);
      }
      else
      {
          wl_display_cancel_read(mDisplay);
      }
  }
  
  void WaylandWindow::setMousePosition(int x, int y) {}
  
  bool WaylandWindow::setOrientation(int width, int height)
  {
      return true;
  }
  
  bool WaylandWindow::setPosition(int x, int y)
  {
      return true;
  }
  
  bool WaylandWindow::resize(int width, int height)
  {
      wl_egl_window_resize(mWindow, width, height, 0, 0);
  
      mWidth  = width;
      mHeight = height;
  
      return true;
  }
  
  void WaylandWindow::setVisible(bool isVisible) {}
  
  void WaylandWindow::signalTestEvent() {}
  
  bool IsWaylandWindowAvailable()
  {
      wl_display *display = wl_display_connect(nullptr);
      if (!display)
      {
          return false;
      }
      wl_display_disconnect(display);
      return true;
  }
  

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