Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 819 insertions, 0 deletions

diff --git a/widget/gtk/MozContainerWayland.cpp b/widget/gtk/MozContainerWayland.cpp
new file mode 100644
index 0000000000..0d9aacc954
--- /dev/null
+++ b/widget/gtk/MozContainerWayland.cpp
@@ -0,0 +1,819 @@
+/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=2:
+ */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+/*
+ * MozContainerWayland is a wrapper over MozContainer which provides
+ * wl_surface for MozContainer widget.
+ *
+ * The widget scheme looks like:
+ *
+ *   ---------------------------------------------------------
+ *  |  mShell Gtk widget (contains wl_surface owned by Gtk+)  |
+ *  |                                                         |
+ *  |  ---------------------------------------------------    |
+ *  | | mContainer (contains wl_surface owned by Gtk+)    |   |
+ *  | |                                                   |   |
+ *  | |  ---------------------------------------------    |   |
+ *  | | | wl_subsurface (attached to wl_surface       |   |   |
+ *  | | |                of mContainer)               |   |   |
+ *  | | |                                             |   |   |
+ *  | | |                                             |   |   |
+ *  | |  ---------------------------------------------    |   |
+ *  |  ---------------------------------------------------    |
+ *   ---------------------------------------------------------
+ *
+ *  We draw to wl_subsurface owned by MozContainerWayland.
+ *  We need to wait until wl_surface of mContainer is created
+ *  and then we create and attach our wl_subsurface to it.
+ *
+ *  First wl_subsurface creation has these steps:
+ *
+ *  1) moz_container_wayland_size_allocate() handler is called when
+ *     mContainer size/position is known.
+ *     It calls moz_container_wayland_surface_create_locked(), registers
+ *     a frame callback handler
+ *     moz_container_wayland_frame_callback_handler().
+ *
+ *  2) moz_container_wayland_frame_callback_handler() is called
+ *     when wl_surface owned by mozContainer is ready.
+ *     We call initial_draw_cbs() handler and we can create our wl_subsurface
+ *     on top of wl_surface owned by mozContainer.
+ *
+ *  When MozContainer hides/show again, moz_container_wayland_size_allocate()
+ *  handler may not be called as MozContainer size is set. So after first
+ *  show/hide sequence use moz_container_wayland_map_event() to create
+ *  wl_subsurface of MozContainer.
+ */
+
+#include "MozContainer.h"
+
+#include <dlfcn.h>
+#include <glib.h>
+#include <stdio.h>
+#include <wayland-egl.h>
+
+#include "mozilla/gfx/gfxVars.h"
+#include "mozilla/StaticPrefs_widget.h"
+#include "nsGtkUtils.h"
+#include "nsWaylandDisplay.h"
+#include "base/task.h"
+
+#ifdef MOZ_LOGGING
+
+#  include "mozilla/Logging.h"
+#  include "nsTArray.h"
+#  include "Units.h"
+#  include "nsWindow.h"
+extern mozilla::LazyLogModule gWidgetWaylandLog;
+extern mozilla::LazyLogModule gWidgetLog;
+#  define LOGWAYLAND(...) \
+    MOZ_LOG(gWidgetWaylandLog, mozilla::LogLevel::Debug, (__VA_ARGS__))
+#  define LOGCONTAINER(...) \
+    MOZ_LOG(gWidgetLog, mozilla::LogLevel::Debug, (__VA_ARGS__))
+#else
+#  define LOGWAYLAND(...)
+#  define LOGCONTAINER(...)
+#endif /* MOZ_LOGGING */
+
+using namespace mozilla;
+using namespace mozilla::widget;
+
+/* init methods */
+static void moz_container_wayland_destroy(GtkWidget* widget);
+
+/* widget class methods */
+static void moz_container_wayland_map(GtkWidget* widget);
+static gboolean moz_container_wayland_map_event(GtkWidget* widget,
+                                                GdkEventAny* event);
+static void moz_container_wayland_size_allocate(GtkWidget* widget,
+                                                GtkAllocation* allocation);
+static bool moz_container_wayland_surface_create_locked(
+    const MutexAutoLock& aProofOfLock, MozContainer* container);
+static void moz_container_wayland_set_opaque_region_locked(
+    const MutexAutoLock& aProofOfLock, MozContainer* container);
+
+// Lock mozcontainer and get wayland surface of it. You need to pair with
+// moz_container_wayland_surface_unlock() even
+// if moz_container_wayland_surface_lock() fails and returns nullptr.
+static struct wl_surface* moz_container_wayland_surface_lock(
+    MozContainer* container);
+static void moz_container_wayland_surface_unlock(MozContainer* container,
+                                                 struct wl_surface** surface);
+
+MozContainerSurfaceLock::MozContainerSurfaceLock(MozContainer* aContainer) {
+  mContainer = aContainer;
+  mSurface = moz_container_wayland_surface_lock(aContainer);
+}
+MozContainerSurfaceLock::~MozContainerSurfaceLock() {
+  moz_container_wayland_surface_unlock(mContainer, &mSurface);
+}
+struct wl_surface* MozContainerSurfaceLock::GetSurface() { return mSurface; }
+
+// Imlemented in MozContainer.cpp
+void moz_container_realize(GtkWidget* widget);
+
+// Invalidate gtk wl_surface to commit changes to wl_subsurface.
+// wl_subsurface changes are effective when parent surface is commited.
+static void moz_container_wayland_invalidate(MozContainer* container) {
+  LOGWAYLAND("moz_container_wayland_invalidate [%p]\n",
+             (void*)moz_container_get_nsWindow(container));
+
+  GdkWindow* window = gtk_widget_get_window(GTK_WIDGET(container));
+  if (!window) {
+    LOGWAYLAND("    Failed - missing GdkWindow!\n");
+    return;
+  }
+  gdk_window_invalidate_rect(window, nullptr, true);
+}
+
+// Route input to parent wl_surface owned by Gtk+ so we get input
+// events from Gtk+.
+static void moz_container_clear_input_region(MozContainer* container) {
+  struct wl_compositor* compositor = WaylandDisplayGet()->GetCompositor();
+  MozContainerWayland* wl_container = &container->wl_container;
+  wl_region* region = wl_compositor_create_region(compositor);
+  wl_surface_set_input_region(wl_container->surface, region);
+  wl_region_destroy(region);
+}
+
+static void moz_container_wayland_move_locked(const MutexAutoLock& aProofOfLock,
+                                              MozContainer* container, int dx,
+                                              int dy) {
+  LOGCONTAINER("moz_container_wayland_move [%p] %d,%d\n",
+               (void*)moz_container_get_nsWindow(container), dx, dy);
+
+  MozContainerWayland* wl_container = &container->wl_container;
+  if (!wl_container->subsurface || (wl_container->subsurface_dx == dx &&
+                                    wl_container->subsurface_dy == dy)) {
+    return;
+  }
+
+  wl_container->subsurface_dx = dx;
+  wl_container->subsurface_dy = dy;
+  wl_subsurface_set_position(wl_container->subsurface,
+                             wl_container->subsurface_dx,
+                             wl_container->subsurface_dy);
+}
+
+// This is called from layout/compositor code only with
+// size equal to GL rendering context. Otherwise there are
+// rendering artifacts as wl_egl_window size does not match
+// GL rendering pipeline setup.
+void moz_container_wayland_egl_window_set_size(MozContainer* container,
+                                               nsIntSize aSize) {
+  MozContainerWayland* wl_container = &container->wl_container;
+  MutexAutoLock lock(*wl_container->container_lock);
+  if (wl_container->eglwindow) {
+    wl_egl_window_resize(wl_container->eglwindow, aSize.width, aSize.height, 0,
+                         0);
+  }
+}
+
+void moz_container_wayland_class_init(MozContainerClass* klass) {
+  /*GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+    GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass); */
+  GtkWidgetClass* widget_class = GTK_WIDGET_CLASS(klass);
+
+  widget_class->map = moz_container_wayland_map;
+  widget_class->map_event = moz_container_wayland_map_event;
+  widget_class->destroy = moz_container_wayland_destroy;
+  widget_class->realize = moz_container_realize;
+  widget_class->size_allocate = moz_container_wayland_size_allocate;
+}
+
+void moz_container_wayland_init(MozContainerWayland* container) {
+  container->surface = nullptr;
+  container->subsurface = nullptr;
+  container->eglwindow = nullptr;
+  container->frame_callback_handler = nullptr;
+  container->viewport = nullptr;
+  container->ready_to_draw = false;
+  container->opaque_region_needs_updates = false;
+  container->opaque_region_corner_radius = 0;
+  container->opaque_region_used = false;
+  container->subsurface_dx = 0;
+  container->subsurface_dy = 0;
+  container->before_first_size_alloc = true;
+  container->buffer_scale = 1;
+  container->initial_draw_cbs.clear();
+  container->container_lock = new mozilla::Mutex("MozContainer lock");
+  container->commit_to_parent = false;
+  container->waiting_to_show = false;
+}
+
+static void moz_container_wayland_destroy(GtkWidget* widget) {
+  MozContainerWayland* container = &MOZ_CONTAINER(widget)->wl_container;
+  if (!container->container_lock) {
+    // moz_container_wayland_init was not called - it's a hidden container.
+    return;
+  }
+  moz_container_wayland_clear_initial_draw_callback(MOZ_CONTAINER(widget));
+  delete container->container_lock;
+  container->container_lock = nullptr;
+}
+
+void moz_container_wayland_add_initial_draw_callback_locked(
+    MozContainer* container, const std::function<void(void)>& initial_draw_cb) {
+  MozContainerWayland* wl_container = &MOZ_CONTAINER(container)->wl_container;
+
+  if (wl_container->ready_to_draw && !wl_container->surface) {
+    NS_WARNING(
+        "moz_container_wayland_add_or_fire_initial_draw_callback:"
+        " ready to draw without wayland surface!");
+  }
+  MOZ_DIAGNOSTIC_ASSERT(!wl_container->ready_to_draw || !wl_container->surface);
+  wl_container->initial_draw_cbs.push_back(initial_draw_cb);
+}
+
+void moz_container_wayland_add_or_fire_initial_draw_callback(
+    MozContainer* container, const std::function<void(void)>& initial_draw_cb) {
+  MozContainerWayland* wl_container = &MOZ_CONTAINER(container)->wl_container;
+  {
+    MutexAutoLock lock(*container->wl_container.container_lock);
+    if (wl_container->ready_to_draw && !wl_container->surface) {
+      NS_WARNING(
+          "moz_container_wayland_add_or_fire_initial_draw_callback: ready to "
+          "draw "
+          "without wayland surface!");
+    }
+    if (!wl_container->ready_to_draw || !wl_container->surface) {
+      wl_container->initial_draw_cbs.push_back(initial_draw_cb);
+      return;
+    }
+  }
+
+  // We're ready to draw as
+  // wl_container->ready_to_draw && wl_container->surface
+  // call the callback directly instead of store them.
+  initial_draw_cb();
+}
+
+static void moz_container_wayland_clear_initial_draw_callback_locked(
+    const MutexAutoLock& aProofOfLock, MozContainer* container) {
+  MozContainerWayland* wl_container = &MOZ_CONTAINER(container)->wl_container;
+  MozClearPointer(wl_container->frame_callback_handler, wl_callback_destroy);
+  wl_container->initial_draw_cbs.clear();
+}
+
+void moz_container_wayland_clear_initial_draw_callback(
+    MozContainer* container) {
+  MutexAutoLock lock(*container->wl_container.container_lock);
+  moz_container_wayland_clear_initial_draw_callback_locked(lock, container);
+}
+
+static void moz_container_wayland_frame_callback_handler(
+    void* data, struct wl_callback* callback, uint32_t time) {
+  MozContainerWayland* wl_container = &MOZ_CONTAINER(data)->wl_container;
+
+  LOGWAYLAND(
+      "%s [%p] frame_callback_handler %p ready_to_draw %d (set to true)"
+      " initial_draw callback %zd\n",
+      __FUNCTION__, (void*)moz_container_get_nsWindow(MOZ_CONTAINER(data)),
+      (void*)wl_container->frame_callback_handler, wl_container->ready_to_draw,
+      wl_container->initial_draw_cbs.size());
+
+  std::vector<std::function<void(void)>> cbs;
+  {
+    // Protect mozcontainer internals changes by container_lock.
+    MutexAutoLock lock(*wl_container->container_lock);
+    MozClearPointer(wl_container->frame_callback_handler, wl_callback_destroy);
+    // It's possible that container is already unmapped so quit in such case.
+    if (!wl_container->surface) {
+      LOGWAYLAND("  container is unmapped, quit.");
+      if (!wl_container->initial_draw_cbs.empty()) {
+        NS_WARNING("Unmapping MozContainer with active draw callback!");
+        wl_container->initial_draw_cbs.clear();
+      }
+      return;
+    }
+    if (wl_container->ready_to_draw) {
+      return;
+    }
+    wl_container->ready_to_draw = true;
+    cbs = std::move(wl_container->initial_draw_cbs);
+  }
+
+  // Call the callbacks registered by
+  // moz_container_wayland_add_or_fire_initial_draw_callback().
+  // and we can't do that under mozcontainer lock.
+  for (auto const& cb : cbs) {
+    cb();
+  }
+}
+
+static const struct wl_callback_listener moz_container_frame_listener = {
+    moz_container_wayland_frame_callback_handler};
+
+static void after_frame_clock_after_paint(GdkFrameClock* clock,
+                                          MozContainer* container) {
+  MozContainerSurfaceLock lock(container);
+  struct wl_surface* surface = lock.GetSurface();
+  if (surface) {
+    wl_surface_commit(surface);
+  }
+}
+
+static bool moz_gdk_wayland_window_add_frame_callback_surface_locked(
+    const MutexAutoLock& aProofOfLock, MozContainer* container) {
+  static auto sGdkWaylandWindowAddCallbackSurface =
+      (void (*)(GdkWindow*, struct wl_surface*))dlsym(
+          RTLD_DEFAULT, "gdk_wayland_window_add_frame_callback_surface");
+
+  if (!StaticPrefs::widget_wayland_opaque_region_enabled_AtStartup() ||
+      !sGdkWaylandWindowAddCallbackSurface) {
+    return false;
+  }
+
+  GdkWindow* window = gtk_widget_get_window(GTK_WIDGET(container));
+  MozContainerWayland* wl_container = &container->wl_container;
+
+  sGdkWaylandWindowAddCallbackSurface(window, wl_container->surface);
+
+  GdkFrameClock* frame_clock = gdk_window_get_frame_clock(window);
+  g_signal_connect_after(frame_clock, "after-paint",
+                         G_CALLBACK(after_frame_clock_after_paint), container);
+  return true;
+}
+
+static void moz_gdk_wayland_window_remove_frame_callback_surface_locked(
+    const MutexAutoLock& aProofOfLock, MozContainer* container) {
+  static auto sGdkWaylandWindowRemoveCallbackSurface =
+      (void (*)(GdkWindow*, struct wl_surface*))dlsym(
+          RTLD_DEFAULT, "gdk_wayland_window_remove_frame_callback_surface");
+
+  if (!sGdkWaylandWindowRemoveCallbackSurface) {
+    return;
+  }
+
+  GdkWindow* window = gtk_widget_get_window(GTK_WIDGET(container));
+  MozContainerWayland* wl_container = &container->wl_container;
+
+  if (wl_container->surface) {
+    sGdkWaylandWindowRemoveCallbackSurface(window, wl_container->surface);
+  }
+
+  GdkFrameClock* frame_clock = gdk_window_get_frame_clock(window);
+  g_signal_handlers_disconnect_by_func(
+      frame_clock, FuncToGpointer(after_frame_clock_after_paint), container);
+}
+
+void moz_container_wayland_unmap(GtkWidget* widget) {
+  MozContainer* container = MOZ_CONTAINER(widget);
+  MozContainerWayland* wl_container = &container->wl_container;
+  MutexAutoLock lock(*wl_container->container_lock);
+
+  LOGCONTAINER("%s [%p]\n", __FUNCTION__,
+               (void*)moz_container_get_nsWindow(container));
+
+  moz_container_wayland_clear_initial_draw_callback_locked(lock, container);
+
+  if (wl_container->opaque_region_used) {
+    moz_gdk_wayland_window_remove_frame_callback_surface_locked(lock,
+                                                                container);
+  }
+  if (wl_container->commit_to_parent) {
+    wl_container->surface = nullptr;
+  }
+
+  MozClearPointer(wl_container->eglwindow, wl_egl_window_destroy);
+  MozClearPointer(wl_container->subsurface, wl_subsurface_destroy);
+  MozClearPointer(wl_container->surface, wl_surface_destroy);
+  MozClearPointer(wl_container->viewport, wp_viewport_destroy);
+
+  wl_container->ready_to_draw = false;
+  wl_container->buffer_scale = 1;
+}
+
+static gboolean moz_container_wayland_map_event(GtkWidget* widget,
+                                                GdkEventAny* event) {
+  MozContainerWayland* wl_container = &MOZ_CONTAINER(widget)->wl_container;
+
+  LOGCONTAINER("%s [%p]\n", __FUNCTION__,
+               (void*)moz_container_get_nsWindow(MOZ_CONTAINER(widget)));
+
+  // We need to mark MozContainer as mapped to make sure
+  // moz_container_wayland_unmap() is called on hide/withdraw.
+  gtk_widget_set_mapped(widget, TRUE);
+
+  // Make sure we're on main thread as we can't lock mozContainer here
+  // due to moz_container_wayland_add_or_fire_initial_draw_callback() call
+  // below.
+  MOZ_DIAGNOSTIC_ASSERT(NS_IsMainThread());
+
+  // Set waiting_to_show flag. It means the mozcontainer is cofigured/mapped
+  // and it's supposed to be visible. *But* it's really visible when we get
+  // moz_container_wayland_add_or_fire_initial_draw_callback() which means
+  // wayland compositor makes it live.
+  wl_container->waiting_to_show = true;
+  MozContainer* container = MOZ_CONTAINER(widget);
+  moz_container_wayland_add_or_fire_initial_draw_callback(
+      container, [container]() -> void {
+        LOGCONTAINER(
+            "[%p] moz_container_wayland_add_or_fire_initial_draw_callback set "
+            "visible",
+            moz_container_get_nsWindow(container));
+        moz_container_wayland_clear_waiting_to_show_flag(container);
+      });
+
+  MutexAutoLock lock(*wl_container->container_lock);
+
+  // Don't create wl_subsurface in map_event when it's already created or
+  // if we create it for the first time.
+  if (wl_container->ready_to_draw || wl_container->before_first_size_alloc) {
+    return FALSE;
+  }
+
+  if (!wl_container->surface) {
+    if (!moz_container_wayland_surface_create_locked(lock,
+                                                     MOZ_CONTAINER(widget))) {
+      return FALSE;
+    }
+  }
+
+  moz_container_wayland_set_scale_factor_locked(lock, MOZ_CONTAINER(widget));
+  moz_container_wayland_set_opaque_region_locked(lock, MOZ_CONTAINER(widget));
+  moz_container_clear_input_region(MOZ_CONTAINER(widget));
+  moz_container_wayland_invalidate(MOZ_CONTAINER(widget));
+  return FALSE;
+}
+
+void moz_container_wayland_map(GtkWidget* widget) {
+  LOGCONTAINER("%s [%p]\n", __FUNCTION__,
+               (void*)moz_container_get_nsWindow(MOZ_CONTAINER(widget)));
+
+  g_return_if_fail(IS_MOZ_CONTAINER(widget));
+  gtk_widget_set_mapped(widget, TRUE);
+
+  if (gtk_widget_get_has_window(widget)) {
+    gdk_window_show(gtk_widget_get_window(widget));
+  }
+}
+
+void moz_container_wayland_size_allocate(GtkWidget* widget,
+                                         GtkAllocation* allocation) {
+  MozContainer* container;
+  GtkAllocation tmp_allocation;
+
+  g_return_if_fail(IS_MOZ_CONTAINER(widget));
+
+  LOGCONTAINER("moz_container_wayland_size_allocate [%p] %d,%d -> %d x %d\n",
+               (void*)moz_container_get_nsWindow(MOZ_CONTAINER(widget)),
+               allocation->x, allocation->y, allocation->width,
+               allocation->height);
+
+  /* short circuit if you can */
+  container = MOZ_CONTAINER(widget);
+  gtk_widget_get_allocation(widget, &tmp_allocation);
+  if (!container->children && tmp_allocation.x == allocation->x &&
+      tmp_allocation.y == allocation->y &&
+      tmp_allocation.width == allocation->width &&
+      tmp_allocation.height == allocation->height) {
+    return;
+  }
+  gtk_widget_set_allocation(widget, allocation);
+
+  if (gtk_widget_get_has_window(widget) && gtk_widget_get_realized(widget)) {
+    gdk_window_move_resize(gtk_widget_get_window(widget), allocation->x,
+                           allocation->y, allocation->width,
+                           allocation->height);
+    // We need to position our subsurface according to GdkWindow
+    // when offset changes (GdkWindow is maximized for instance).
+    // see gtk-clutter-embed.c for reference.
+    MutexAutoLock lock(*container->wl_container.container_lock);
+    if (!container->wl_container.surface) {
+      if (!moz_container_wayland_surface_create_locked(lock, container)) {
+        return;
+      }
+    }
+    moz_container_wayland_set_scale_factor_locked(lock, container);
+    moz_container_wayland_set_opaque_region_locked(lock, container);
+    moz_container_wayland_move_locked(lock, container, allocation->x,
+                                      allocation->y);
+    moz_container_clear_input_region(container);
+    moz_container_wayland_invalidate(MOZ_CONTAINER(widget));
+    container->wl_container.before_first_size_alloc = false;
+  }
+}
+
+static wl_region* moz_container_wayland_create_opaque_region(
+    int aX, int aY, int aWidth, int aHeight, int aCornerRadius) {
+  struct wl_compositor* compositor = WaylandDisplayGet()->GetCompositor();
+  wl_region* region = wl_compositor_create_region(compositor);
+  wl_region_add(region, aX, aY, aWidth, aHeight);
+  if (aCornerRadius) {
+    wl_region_subtract(region, aX, aY, aCornerRadius, aCornerRadius);
+    wl_region_subtract(region, aX + aWidth - aCornerRadius, aY, aCornerRadius,
+                       aCornerRadius);
+  }
+  return region;
+}
+
+static void moz_container_wayland_set_opaque_region_locked(
+    const MutexAutoLock& aProofOfLock, MozContainer* container) {
+  MozContainerWayland* wl_container = &container->wl_container;
+
+  if (!wl_container->opaque_region_needs_updates) {
+    return;
+  }
+
+  if (!wl_container->opaque_region_used) {
+    wl_container->opaque_region_needs_updates = false;
+    return;
+  }
+
+  GtkAllocation allocation;
+  gtk_widget_get_allocation(GTK_WIDGET(container), &allocation);
+
+  wl_region* region = moz_container_wayland_create_opaque_region(
+      0, 0, allocation.width, allocation.height,
+      wl_container->opaque_region_corner_radius);
+  wl_surface_set_opaque_region(wl_container->surface, region);
+  wl_region_destroy(region);
+  wl_container->opaque_region_needs_updates = false;
+}
+
+static void moz_container_wayland_set_opaque_region(MozContainer* container) {
+  MozContainerWayland* wl_container = &container->wl_container;
+  MutexAutoLock lock(*wl_container->container_lock);
+  if (wl_container->surface) {
+    moz_container_wayland_set_opaque_region_locked(lock, container);
+  }
+}
+
+static void moz_container_wayland_surface_set_scale_locked(
+    const MutexAutoLock& aProofOfLock, MozContainerWayland* wl_container,
+    int scale) {
+  if (wl_container->buffer_scale == scale) {
+    return;
+  }
+
+  LOGCONTAINER("%s scale %d\n", __FUNCTION__, scale);
+
+  // There is a chance that the attached wl_buffer has not yet been doubled
+  // on the main thread when scale factor changed to 2. This leads to
+  // crash with the following message:
+  // Buffer size (AxB) must be an integer multiple of the buffer_scale (2)
+  // Removing the possibly wrong wl_buffer to prevent that crash:
+  wl_surface_attach(wl_container->surface, nullptr, 0, 0);
+  wl_surface_set_buffer_scale(wl_container->surface, scale);
+  wl_container->buffer_scale = scale;
+}
+
+void moz_container_wayland_set_scale_factor_locked(
+    const MutexAutoLock& aProofOfLock, MozContainer* container) {
+  if (gfx::gfxVars::UseWebRenderCompositor()) {
+    // the compositor backend handles scaling itself
+    return;
+  }
+
+  MozContainerWayland* wl_container = &container->wl_container;
+  wl_container->container_lock->AssertCurrentThreadOwns();
+
+  nsWindow* window = moz_container_get_nsWindow(container);
+  MOZ_DIAGNOSTIC_ASSERT(window);
+  if (window->UseFractionalScale()) {
+    if (!wl_container->viewport) {
+      wl_container->viewport = wp_viewporter_get_viewport(
+          WaylandDisplayGet()->GetViewporter(), wl_container->surface);
+    }
+
+    GdkWindow* gdkWindow = gtk_widget_get_window(GTK_WIDGET(container));
+    wp_viewport_set_destination(wl_container->viewport,
+                                gdk_window_get_width(gdkWindow),
+                                gdk_window_get_height(gdkWindow));
+  } else {
+    moz_container_wayland_surface_set_scale_locked(
+        aProofOfLock, wl_container, window->GdkCeiledScaleFactor());
+  }
+}
+
+void moz_container_wayland_set_scale_factor(MozContainer* container) {
+  MutexAutoLock lock(*container->wl_container.container_lock);
+  if (container->wl_container.surface) {
+    moz_container_wayland_set_scale_factor_locked(lock, container);
+  }
+}
+
+bool moz_container_wayland_size_matches_scale_factor_locked(
+    const MutexAutoLock& aProofOfLock, MozContainer* container, int aWidth,
+    int aHeight) {
+  return aWidth % container->wl_container.buffer_scale == 0 &&
+         aHeight % container->wl_container.buffer_scale == 0;
+}
+
+static bool moz_container_wayland_surface_create_locked(
+    const MutexAutoLock& aProofOfLock, MozContainer* container) {
+  MozContainerWayland* wl_container = &container->wl_container;
+
+  LOGWAYLAND("%s [%p]\n", __FUNCTION__,
+             (void*)moz_container_get_nsWindow(container));
+
+  GdkWindow* window = gtk_widget_get_window(GTK_WIDGET(container));
+  MOZ_DIAGNOSTIC_ASSERT(window);
+
+  wl_surface* parent_surface = gdk_wayland_window_get_wl_surface(window);
+  if (!parent_surface) {
+    LOGWAYLAND("    Failed - missing parent surface!");
+    return false;
+  }
+  LOGWAYLAND("    gtk wl_surface %p ID %d\n", (void*)parent_surface,
+             wl_proxy_get_id((struct wl_proxy*)parent_surface));
+
+  if (wl_container->commit_to_parent) {
+    LOGWAYLAND("    commit to parent");
+    wl_container->surface = parent_surface;
+    NS_DispatchToCurrentThread(NewRunnableFunction(
+        "moz_container_wayland_frame_callback_handler",
+        &moz_container_wayland_frame_callback_handler, container, nullptr, 0));
+    return true;
+  }
+
+  // Available as of GTK 3.8+
+  struct wl_compositor* compositor = WaylandDisplayGet()->GetCompositor();
+  wl_container->surface = wl_compositor_create_surface(compositor);
+  if (!wl_container->surface) {
+    LOGWAYLAND("    Failed - can't create surface!");
+    return false;
+  }
+
+  wl_container->subsurface =
+      wl_subcompositor_get_subsurface(WaylandDisplayGet()->GetSubcompositor(),
+                                      wl_container->surface, parent_surface);
+  if (!wl_container->subsurface) {
+    MozClearPointer(wl_container->surface, wl_surface_destroy);
+    LOGWAYLAND("    Failed - can't create sub-surface!");
+    return false;
+  }
+  wl_subsurface_set_desync(wl_container->subsurface);
+
+  // Try to guess subsurface offset to avoid potential flickering.
+  int dx, dy;
+  if (moz_container_get_nsWindow(container)->GetCSDDecorationOffset(&dx, &dy)) {
+    wl_container->subsurface_dx = dx;
+    wl_container->subsurface_dy = dy;
+    wl_subsurface_set_position(wl_container->subsurface, dx, dy);
+    LOGWAYLAND("    guessing subsurface position %d %d\n", dx, dy);
+  }
+
+  // If there's pending frame callback it's for wrong parent surface,
+  // so delete it.
+  if (wl_container->frame_callback_handler) {
+    MozClearPointer(wl_container->frame_callback_handler, wl_callback_destroy);
+  }
+  wl_container->frame_callback_handler = wl_surface_frame(parent_surface);
+  wl_callback_add_listener(wl_container->frame_callback_handler,
+                           &moz_container_frame_listener, container);
+  LOGWAYLAND(
+      "    created frame callback ID %d\n",
+      wl_proxy_get_id((struct wl_proxy*)wl_container->frame_callback_handler));
+
+  wl_surface_commit(wl_container->surface);
+  wl_display_flush(WaylandDisplayGet()->GetDisplay());
+
+  wl_container->opaque_region_used =
+      moz_gdk_wayland_window_add_frame_callback_surface_locked(aProofOfLock,
+                                                               container);
+
+  LOGWAYLAND("    created surface %p ID %d\n", (void*)wl_container->surface,
+             wl_proxy_get_id((struct wl_proxy*)wl_container->surface));
+  return true;
+}
+
+struct wl_surface* moz_container_wayland_surface_lock(MozContainer* container)
+    MOZ_NO_THREAD_SAFETY_ANALYSIS {
+  // LOGWAYLAND("%s [%p] surface %p ready_to_draw %d\n", __FUNCTION__,
+  //           (void*)container, (void*)container->wl_container.surface,
+  //           container->wl_container.ready_to_draw);
+  container->wl_container.container_lock->Lock();
+  if (!container->wl_container.surface ||
+      !container->wl_container.ready_to_draw) {
+    return nullptr;
+  }
+  return container->wl_container.surface;
+}
+
+void moz_container_wayland_surface_unlock(MozContainer* container,
+                                          struct wl_surface** surface)
+    MOZ_NO_THREAD_SAFETY_ANALYSIS {
+  // Temporarily disabled to avoid log noise
+  // LOGWAYLAND("%s [%p] surface %p\n", __FUNCTION__, (void*)container,
+  //            (void*)container->wl_container.surface);
+  if (*surface) {
+    *surface = nullptr;
+  }
+  container->wl_container.container_lock->Unlock();
+}
+
+bool moz_container_wayland_egl_window_needs_size_update(MozContainer* container,
+                                                        nsIntSize aSize,
+                                                        int aScale) {
+  MozContainerWayland* wl_container = &container->wl_container;
+  if (!wl_container->eglwindow) {
+    return false;
+  }
+  if (wl_container->buffer_scale != aScale) {
+    return true;
+  }
+  nsIntSize recentSize;
+  wl_egl_window_get_attached_size(wl_container->eglwindow, &recentSize.width,
+                                  &recentSize.height);
+  return aSize != recentSize;
+}
+
+struct wl_egl_window* moz_container_wayland_get_egl_window(
+    MozContainer* container, double scale) {
+  MozContainerWayland* wl_container = &container->wl_container;
+
+  LOGCONTAINER("%s [%p] eglwindow %p scale %d\n", __FUNCTION__,
+               (void*)moz_container_get_nsWindow(container),
+               (void*)wl_container->eglwindow, (int)scale);
+
+  MutexAutoLock lock(*wl_container->container_lock);
+  if (!wl_container->surface || !wl_container->ready_to_draw) {
+    LOGCONTAINER(
+        "  quit, wl_container->surface %p wl_container->ready_to_draw %d\n",
+        wl_container->surface, wl_container->ready_to_draw);
+    return nullptr;
+  }
+
+  GdkWindow* window = gtk_widget_get_window(GTK_WIDGET(container));
+  nsIntSize requestedSize((int)round(gdk_window_get_width(window) * scale),
+                          (int)round(gdk_window_get_height(window) * scale));
+
+  if (!wl_container->eglwindow) {
+    wl_container->eglwindow = wl_egl_window_create(
+        wl_container->surface, requestedSize.width, requestedSize.height);
+
+    LOGCONTAINER("%s [%p] created eglwindow %p size %d x %d (with scale %f)\n",
+                 __FUNCTION__, (void*)moz_container_get_nsWindow(container),
+                 (void*)wl_container->eglwindow, requestedSize.width,
+                 requestedSize.height, scale);
+  } else {
+    nsIntSize recentSize;
+    wl_egl_window_get_attached_size(wl_container->eglwindow, &recentSize.width,
+                                    &recentSize.height);
+    if (requestedSize != recentSize) {
+      LOGCONTAINER("%s [%p] resized to %d x %d (with scale %f)\n", __FUNCTION__,
+                   (void*)moz_container_get_nsWindow(container),
+                   requestedSize.width, requestedSize.height, scale);
+      wl_egl_window_resize(wl_container->eglwindow, requestedSize.width,
+                           requestedSize.height, 0, 0);
+    }
+  }
+  moz_container_wayland_surface_set_scale_locked(lock, wl_container,
+                                                 static_cast<int>(scale));
+  return wl_container->eglwindow;
+}
+
+gboolean moz_container_wayland_has_egl_window(MozContainer* container) {
+  return container->wl_container.eglwindow != nullptr;
+}
+
+void moz_container_wayland_update_opaque_region(MozContainer* container,
+                                                int corner_radius) {
+  MozContainerWayland* wl_container = &container->wl_container;
+  wl_container->opaque_region_needs_updates = true;
+  wl_container->opaque_region_corner_radius = corner_radius;
+
+  // When GL compositor / WebRender is used,
+  // moz_container_wayland_get_egl_window() is called only once when window
+  // is created or resized so update opaque region now.
+  if (moz_container_wayland_has_egl_window(container)) {
+    moz_container_wayland_set_opaque_region(container);
+  }
+}
+
+gboolean moz_container_wayland_can_draw(MozContainer* container) {
+  MozContainerWayland* wl_container = &container->wl_container;
+  MutexAutoLock lock(*wl_container->container_lock);
+  return wl_container->ready_to_draw;
+}
+
+double moz_container_wayland_get_scale(MozContainer* container) {
+  nsWindow* window = moz_container_get_nsWindow(container);
+  return window ? window->FractionalScaleFactor() : 1;
+}
+
+void moz_container_wayland_set_commit_to_parent(MozContainer* container) {
+  MozContainerWayland* wl_container = &container->wl_container;
+  MOZ_DIAGNOSTIC_ASSERT(!wl_container->surface);
+  wl_container->commit_to_parent = true;
+}
+
+bool moz_container_wayland_is_commiting_to_parent(MozContainer* container) {
+  MozContainerWayland* wl_container = &container->wl_container;
+  return wl_container->commit_to_parent;
+}
+
+bool moz_container_wayland_is_waiting_to_show(MozContainer* container) {
+  MOZ_DIAGNOSTIC_ASSERT(NS_IsMainThread());
+  return container->wl_container.waiting_to_show;
+}
+
+void moz_container_wayland_clear_waiting_to_show_flag(MozContainer* container) {
+  MOZ_DIAGNOSTIC_ASSERT(NS_IsMainThread());
+  container->wl_container.waiting_to_show = false;
+}