1 files changed, 760 insertions, 0 deletions
diff --git a/gfx/layers/NativeLayerWayland.cpp b/gfx/layers/NativeLayerWayland.cpp
new file mode 100644
index 0000000000..55250b3de0
--- /dev/null
+++ b/gfx/layers/NativeLayerWayland.cpp
@@ -0,0 +1,760 @@
+/* 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/. */
+
+#include "mozilla/layers/NativeLayerWayland.h"
+
+#include <dlfcn.h>
+#include <utility>
+#include <algorithm>
+
+#include "gfxUtils.h"
+#include "nsGtkUtils.h"
+#include "GLContextProvider.h"
+#include "GLBlitHelper.h"
+#include "mozilla/gfx/DataSurfaceHelpers.h"
+#include "mozilla/gfx/Logging.h"
+#include "mozilla/layers/SurfacePoolWayland.h"
+#include "mozilla/StaticPrefs_widget.h"
+#include "mozilla/webrender/RenderThread.h"
+
+namespace mozilla::layers {
+
+using gfx::BackendType;
+using gfx::DrawTarget;
+using gfx::IntPoint;
+using gfx::IntRect;
+using gfx::IntRegion;
+using gfx::IntSize;
+using gfx::Matrix4x4;
+using gfx::Point;
+using gfx::Rect;
+using gfx::SamplingFilter;
+using gfx::Size;
+
+static const struct wl_callback_listener sFrameListenerNativeLayerWayland = {
+    NativeLayerWayland::FrameCallbackHandler};
+
+CallbackMultiplexHelper::CallbackMultiplexHelper(CallbackFunc aCallbackFunc,
+                                                 void* aCallbackData)
+    : mCallbackFunc(aCallbackFunc), mCallbackData(aCallbackData) {}
+
+void CallbackMultiplexHelper::Callback(uint32_t aTime) {
+  if (!mActive) {
+    return;
+  }
+  mActive = false;
+
+  // This is likely the first of a batch of frame callbacks being processed and
+  // may trigger the setup of a successive one. In order to avoid complexity,
+  // defer calling the callback function until we had a chance to process
+  // all pending frame callbacks.
+
+  AddRef();
+  nsCOMPtr<nsIRunnable> runnable = NewRunnableMethod<uint32_t>(
+      "layers::CallbackMultiplexHelper::RunCallback", this,
+      &CallbackMultiplexHelper::RunCallback, aTime);
+  MOZ_ALWAYS_SUCCEEDS(NS_DispatchToCurrentThreadQueue(
+      runnable.forget(), EventQueuePriority::Vsync));
+}
+
+void CallbackMultiplexHelper::RunCallback(uint32_t aTime) {
+  mCallbackFunc(mCallbackData, aTime);
+  Release();
+}
+
+/* static */
+already_AddRefed<NativeLayerRootWayland>
+NativeLayerRootWayland::CreateForMozContainer(MozContainer* aContainer) {
+  RefPtr<NativeLayerRootWayland> layerRoot =
+      new NativeLayerRootWayland(aContainer);
+  return layerRoot.forget();
+}
+
+NativeLayerRootWayland::NativeLayerRootWayland(MozContainer* aContainer)
+    : mMutex("NativeLayerRootWayland"), mContainer(aContainer) {
+  g_object_ref(mContainer);
+}
+
+NativeLayerRootWayland::~NativeLayerRootWayland() {
+  GdkWindow* gdkWindow = gtk_widget_get_window(GTK_WIDGET(mContainer));
+  if (gdkWindow) {
+    GdkFrameClock* frameClock = gdk_window_get_frame_clock(gdkWindow);
+    g_signal_handlers_disconnect_by_data(frameClock, this);
+  }
+  g_object_unref(mContainer);
+}
+
+already_AddRefed<NativeLayer> NativeLayerRootWayland::CreateLayer(
+    const IntSize& aSize, bool aIsOpaque,
+    SurfacePoolHandle* aSurfacePoolHandle) {
+  RefPtr<NativeLayer> layer = new NativeLayerWayland(
+      aSize, aIsOpaque, aSurfacePoolHandle->AsSurfacePoolHandleWayland());
+  return layer.forget();
+}
+
+already_AddRefed<NativeLayer>
+NativeLayerRootWayland::CreateLayerForExternalTexture(bool aIsOpaque) {
+  RefPtr<NativeLayer> layer = new NativeLayerWayland(aIsOpaque);
+  return layer.forget();
+}
+
+void NativeLayerRootWayland::AppendLayer(NativeLayer* aLayer) {
+  MOZ_RELEASE_ASSERT(false);
+  MutexAutoLock lock(mMutex);
+
+  RefPtr<NativeLayerWayland> layerWayland = aLayer->AsNativeLayerWayland();
+  MOZ_RELEASE_ASSERT(layerWayland);
+
+  mSublayers.AppendElement(layerWayland);
+}
+
+void NativeLayerRootWayland::RemoveLayer(NativeLayer* aLayer) {
+  MOZ_RELEASE_ASSERT(false);
+  MutexAutoLock lock(mMutex);
+
+  RefPtr<NativeLayerWayland> layerWayland = aLayer->AsNativeLayerWayland();
+  MOZ_RELEASE_ASSERT(layerWayland);
+
+  mSublayers.RemoveElement(layerWayland);
+}
+
+void NativeLayerRootWayland::SetLayers(
+    const nsTArray<RefPtr<NativeLayer>>& aLayers) {
+  MutexAutoLock lock(mMutex);
+
+  nsTArray<RefPtr<NativeLayerWayland>> newSublayers(aLayers.Length());
+  for (const RefPtr<NativeLayer>& sublayer : aLayers) {
+    RefPtr<NativeLayerWayland> layer = sublayer->AsNativeLayerWayland();
+    newSublayers.AppendElement(layer);
+  }
+
+  if (newSublayers != mSublayers) {
+    for (const RefPtr<NativeLayerWayland>& layer : mSublayers) {
+      if (!newSublayers.Contains(layer)) {
+        mOldSublayers.AppendElement(layer);
+      }
+    }
+    mSublayers = std::move(newSublayers);
+    mNewLayers = true;
+  }
+}
+
+bool NativeLayerRootWayland::CommitToScreen() {
+  MutexAutoLock lock(mMutex);
+  return CommitToScreen(lock);
+}
+
+bool NativeLayerRootWayland::CommitToScreen(const MutexAutoLock& aProofOfLock) {
+  mFrameInProcess = false;
+
+  MozContainerSurfaceLock lock(mContainer);
+  struct wl_surface* containerSurface = lock.GetSurface();
+  if (!containerSurface) {
+    if (!mCallbackRequested) {
+      RefPtr<NativeLayerRootWayland> self(this);
+      moz_container_wayland_add_initial_draw_callback_locked(
+          mContainer, [self]() -> void {
+            MutexAutoLock lock(self->mMutex);
+            if (!self->mFrameInProcess) {
+              self->CommitToScreen(lock);
+            }
+            self->mCallbackRequested = false;
+          });
+      mCallbackRequested = true;
+    }
+    return true;
+  }
+
+  wl_surface* previousSurface = nullptr;
+  for (RefPtr<NativeLayerWayland>& layer : mSublayers) {
+    layer->EnsureParentSurface(containerSurface);
+
+    if (mNewLayers) {
+      wl_subsurface_place_above(layer->mWlSubsurface, previousSurface
+                                                          ? previousSurface
+                                                          : containerSurface);
+      previousSurface = layer->mWlSurface;
+    }
+
+    MOZ_RELEASE_ASSERT(layer->mTransform.Is2D());
+    auto transform2D = layer->mTransform.As2D();
+
+    Rect surfaceRectClipped =
+        Rect(0, 0, (float)layer->mSize.width, (float)layer->mSize.height);
+    surfaceRectClipped =
+        surfaceRectClipped.Intersect(Rect(layer->mDisplayRect));
+
+    transform2D.PostTranslate((float)layer->mPosition.x,
+                              (float)layer->mPosition.y);
+    surfaceRectClipped = transform2D.TransformBounds(surfaceRectClipped);
+
+    if (layer->mClipRect) {
+      surfaceRectClipped =
+          surfaceRectClipped.Intersect(Rect(layer->mClipRect.value()));
+    }
+
+    if (roundf(surfaceRectClipped.width) > 0 &&
+        roundf(surfaceRectClipped.height) > 0) {
+      layer->SetBufferTransformFlipped(transform2D._11 < 0.0,
+                                       transform2D._22 < 0.0);
+
+      double bufferScale = moz_container_wayland_get_scale(mContainer);
+      layer->SetSubsurfacePosition(floor(surfaceRectClipped.x / bufferScale),
+                                   floor(surfaceRectClipped.y / bufferScale));
+      layer->SetViewportDestinationSize(
+          ceil(surfaceRectClipped.width / bufferScale),
+          ceil(surfaceRectClipped.height / bufferScale));
+
+      auto transform2DInversed = transform2D.Inverse();
+      Rect bufferClip = transform2DInversed.TransformBounds(surfaceRectClipped);
+      layer->SetViewportSourceRect(bufferClip);
+
+      layer->Commit();
+    } else {
+      layer->Unmap();
+    }
+  }
+
+  if (mNewLayers) {
+    for (RefPtr<NativeLayerWayland>& layer : mOldSublayers) {
+      layer->Unmap();
+    }
+    mOldSublayers.Clear();
+
+    nsCOMPtr<nsIRunnable> updateLayersRunnable = NewRunnableMethod<>(
+        "layers::NativeLayerRootWayland::UpdateLayersOnMainThread", this,
+        &NativeLayerRootWayland::UpdateLayersOnMainThread);
+    MOZ_ALWAYS_SUCCEEDS(NS_DispatchToMainThreadQueue(
+        updateLayersRunnable.forget(), EventQueuePriority::Normal));
+    mNewLayers = false;
+  }
+
+  if (containerSurface != mWlSurface) {
+    if (!mShmBuffer) {
+      mShmBuffer = widget::WaylandBufferSHM::Create(LayoutDeviceIntSize(1, 1));
+      mShmBuffer->Clear();
+    }
+    mShmBuffer->AttachAndCommit(containerSurface);
+    mWlSurface = containerSurface;
+  } else {
+    wl_surface_commit(containerSurface);
+  }
+
+  wl_display_flush(widget::WaylandDisplayGet()->GetDisplay());
+  return true;
+}
+
+void NativeLayerRootWayland::RequestFrameCallback(CallbackFunc aCallbackFunc,
+                                                  void* aCallbackData) {
+  MutexAutoLock lock(mMutex);
+
+  mCallbackMultiplexHelper =
+      new CallbackMultiplexHelper(aCallbackFunc, aCallbackData);
+
+  for (const RefPtr<NativeLayerWayland>& layer : mSublayersOnMainThread) {
+    layer->RequestFrameCallback(mCallbackMultiplexHelper);
+  }
+
+  MozContainerSurfaceLock lockContainer(mContainer);
+  struct wl_surface* wlSurface = lockContainer.GetSurface();
+  if (wlSurface) {
+    wl_surface_commit(wlSurface);
+    wl_display_flush(widget::WaylandDisplayGet()->GetDisplay());
+  }
+}
+
+static void sAfterFrameClockAfterPaint(
+    GdkFrameClock* aClock, NativeLayerRootWayland* aNativeLayerRoot) {
+  aNativeLayerRoot->AfterFrameClockAfterPaint();
+}
+
+void NativeLayerRootWayland::AfterFrameClockAfterPaint() {
+  MutexAutoLock lock(mMutex);
+  MozContainerSurfaceLock lockContainer(mContainer);
+  struct wl_surface* containerSurface = lockContainer.GetSurface();
+  for (const RefPtr<NativeLayerWayland>& layer : mSublayersOnMainThread) {
+    wl_surface_commit(layer->mWlSurface);
+  }
+  if (containerSurface) {
+    wl_surface_commit(containerSurface);
+  }
+}
+
+void NativeLayerRootWayland::UpdateLayersOnMainThread() {
+  AssertIsOnMainThread();
+  MutexAutoLock lock(mMutex);
+
+  static auto sGdkWaylandWindowAddCallbackSurface =
+      (void (*)(GdkWindow*, struct wl_surface*))dlsym(
+          RTLD_DEFAULT, "gdk_wayland_window_add_frame_callback_surface");
+  static auto sGdkWaylandWindowRemoveCallbackSurface =
+      (void (*)(GdkWindow*, struct wl_surface*))dlsym(
+          RTLD_DEFAULT, "gdk_wayland_window_remove_frame_callback_surface");
+
+  MozContainerSurfaceLock lockContainer(mContainer);
+  struct wl_surface* containerSurface = lockContainer.GetSurface();
+  GdkWindow* gdkWindow = gtk_widget_get_window(GTK_WIDGET(mContainer));
+
+  mSublayersOnMainThread.RemoveElementsBy([&](const auto& layer) {
+    if (!mSublayers.Contains(layer)) {
+      if (layer->IsOpaque() &&
+          StaticPrefs::widget_wayland_opaque_region_enabled_AtStartup() &&
+          sGdkWaylandWindowAddCallbackSurface && gdkWindow) {
+        sGdkWaylandWindowRemoveCallbackSurface(gdkWindow, layer->mWlSurface);
+
+        wl_compositor* compositor =
+            widget::WaylandDisplayGet()->GetCompositor();
+        wl_region* region = wl_compositor_create_region(compositor);
+        wl_surface_set_opaque_region(layer->mWlSurface, region);
+        wl_region_destroy(region);
+        wl_surface_commit(layer->mWlSurface);
+      }
+      return true;
+    }
+    return false;
+  });
+
+  for (const RefPtr<NativeLayerWayland>& layer : mSublayers) {
+    if (!mSublayersOnMainThread.Contains(layer)) {
+      if (layer->IsOpaque() &&
+          StaticPrefs::widget_wayland_opaque_region_enabled_AtStartup() &&
+          sGdkWaylandWindowRemoveCallbackSurface && gdkWindow) {
+        sGdkWaylandWindowAddCallbackSurface(gdkWindow, layer->mWlSurface);
+
+        wl_compositor* compositor =
+            widget::WaylandDisplayGet()->GetCompositor();
+        wl_region* region = wl_compositor_create_region(compositor);
+        wl_region_add(region, 0, 0, INT32_MAX, INT32_MAX);
+        wl_surface_set_opaque_region(layer->mWlSurface, region);
+        wl_region_destroy(region);
+        wl_surface_commit(layer->mWlSurface);
+      }
+      if (mCallbackMultiplexHelper && mCallbackMultiplexHelper->IsActive()) {
+        layer->RequestFrameCallback(mCallbackMultiplexHelper);
+      }
+      mSublayersOnMainThread.AppendElement(layer);
+    }
+  }
+
+  if (containerSurface) {
+    wl_surface_commit(containerSurface);
+  }
+
+  if (!mGdkAfterPaintId && gdkWindow) {
+    GdkFrameClock* frameClock = gdk_window_get_frame_clock(gdkWindow);
+    mGdkAfterPaintId =
+        g_signal_connect_after(frameClock, "after-paint",
+                               G_CALLBACK(sAfterFrameClockAfterPaint), this);
+  }
+}
+
+NativeLayerWayland::NativeLayerWayland(
+    const IntSize& aSize, bool aIsOpaque,
+    SurfacePoolHandleWayland* aSurfacePoolHandle)
+    : mMutex("NativeLayerWayland"),
+      mSurfacePoolHandle(aSurfacePoolHandle),
+      mSize(aSize),
+      mIsOpaque(aIsOpaque) {
+  MOZ_RELEASE_ASSERT(mSurfacePoolHandle,
+                     "Need a non-null surface pool handle.");
+
+  widget::nsWaylandDisplay* waylandDisplay = widget::WaylandDisplayGet();
+  wl_compositor* compositor = waylandDisplay->GetCompositor();
+  mWlSurface = wl_compositor_create_surface(compositor);
+
+  wl_region* region = wl_compositor_create_region(compositor);
+  wl_surface_set_input_region(mWlSurface, region);
+  wl_region_destroy(region);
+
+  wp_viewporter* viewporter = waylandDisplay->GetViewporter();
+  mViewport = wp_viewporter_get_viewport(viewporter, mWlSurface);
+}
+
+NativeLayerWayland::NativeLayerWayland(bool aIsOpaque)
+    : mMutex("NativeLayerWayland"),
+      mSurfacePoolHandle(nullptr),
+      mIsOpaque(aIsOpaque) {
+  MOZ_RELEASE_ASSERT(false);  // external image
+}
+
+NativeLayerWayland::~NativeLayerWayland() {
+  MutexAutoLock lock(mMutex);
+
+  if (mInProgressBuffer) {
+    mSurfacePoolHandle->ReturnBufferToPool(mInProgressBuffer);
+    mInProgressBuffer = nullptr;
+  }
+  if (mFrontBuffer) {
+    mSurfacePoolHandle->ReturnBufferToPool(mFrontBuffer);
+    mFrontBuffer = nullptr;
+  }
+  MozClearPointer(mCallback, wl_callback_destroy);
+  MozClearPointer(mViewport, wp_viewport_destroy);
+  MozClearPointer(mWlSubsurface, wl_subsurface_destroy);
+  MozClearPointer(mWlSurface, wl_surface_destroy);
+}
+
+void NativeLayerWayland::AttachExternalImage(
+    wr::RenderTextureHost* aExternalImage) {
+  MOZ_RELEASE_ASSERT(false);
+}
+
+void NativeLayerWayland::SetSurfaceIsFlipped(bool aIsFlipped) {
+  MutexAutoLock lock(mMutex);
+
+  if (aIsFlipped != mSurfaceIsFlipped) {
+    mSurfaceIsFlipped = aIsFlipped;
+  }
+}
+
+bool NativeLayerWayland::SurfaceIsFlipped() {
+  MutexAutoLock lock(mMutex);
+
+  return mSurfaceIsFlipped;
+}
+
+IntSize NativeLayerWayland::GetSize() {
+  MutexAutoLock lock(mMutex);
+  return mSize;
+}
+
+void NativeLayerWayland::SetPosition(const IntPoint& aPosition) {
+  MutexAutoLock lock(mMutex);
+
+  if (aPosition != mPosition) {
+    mPosition = aPosition;
+  }
+}
+
+IntPoint NativeLayerWayland::GetPosition() {
+  MutexAutoLock lock(mMutex);
+  return mPosition;
+}
+
+void NativeLayerWayland::SetTransform(const Matrix4x4& aTransform) {
+  MutexAutoLock lock(mMutex);
+  MOZ_ASSERT(aTransform.IsRectilinear());
+
+  if (aTransform != mTransform) {
+    mTransform = aTransform;
+  }
+}
+
+void NativeLayerWayland::SetSamplingFilter(SamplingFilter aSamplingFilter) {
+  MutexAutoLock lock(mMutex);
+
+  if (aSamplingFilter != mSamplingFilter) {
+    mSamplingFilter = aSamplingFilter;
+  }
+}
+
+Matrix4x4 NativeLayerWayland::GetTransform() {
+  MutexAutoLock lock(mMutex);
+  return mTransform;
+}
+
+IntRect NativeLayerWayland::GetRect() {
+  MutexAutoLock lock(mMutex);
+  return IntRect(mPosition, mSize);
+}
+
+bool NativeLayerWayland::IsOpaque() {
+  MutexAutoLock lock(mMutex);
+  return mIsOpaque;
+}
+
+void NativeLayerWayland::SetClipRect(const Maybe<IntRect>& aClipRect) {
+  MutexAutoLock lock(mMutex);
+
+  if (aClipRect != mClipRect) {
+    mClipRect = aClipRect;
+  }
+}
+
+Maybe<IntRect> NativeLayerWayland::ClipRect() {
+  MutexAutoLock lock(mMutex);
+  return mClipRect;
+}
+
+IntRect NativeLayerWayland::CurrentSurfaceDisplayRect() {
+  MutexAutoLock lock(mMutex);
+  return mDisplayRect;
+}
+
+RefPtr<DrawTarget> NativeLayerWayland::NextSurfaceAsDrawTarget(
+    const IntRect& aDisplayRect, const IntRegion& aUpdateRegion,
+    BackendType aBackendType) {
+  MutexAutoLock lock(mMutex);
+
+  mDisplayRect = IntRect(aDisplayRect);
+  mDirtyRegion = IntRegion(aUpdateRegion);
+
+  MOZ_ASSERT(!mInProgressBuffer);
+  if (mFrontBuffer && !mFrontBuffer->IsAttached()) {
+    // the Wayland compositor released the buffer early, we can reuse it
+    mInProgressBuffer = std::move(mFrontBuffer);
+  } else {
+    mInProgressBuffer = mSurfacePoolHandle->ObtainBufferFromPool(mSize);
+    if (mFrontBuffer) {
+      HandlePartialUpdate(lock);
+      mSurfacePoolHandle->ReturnBufferToPool(mFrontBuffer);
+    }
+  }
+  mFrontBuffer = nullptr;
+
+  if (!mInProgressBuffer) {
+    gfxCriticalError() << "Failed to obtain buffer";
+    wr::RenderThread::Get()->HandleWebRenderError(
+        wr::WebRenderError::NEW_SURFACE);
+    return nullptr;
+  }
+
+  return mInProgressBuffer->Lock();
+}
+
+Maybe<GLuint> NativeLayerWayland::NextSurfaceAsFramebuffer(
+    const IntRect& aDisplayRect, const IntRegion& aUpdateRegion,
+    bool aNeedsDepth) {
+  MutexAutoLock lock(mMutex);
+
+  mDisplayRect = IntRect(aDisplayRect);
+  mDirtyRegion = IntRegion(aUpdateRegion);
+
+  MOZ_ASSERT(!mInProgressBuffer);
+  if (mFrontBuffer && !mFrontBuffer->IsAttached()) {
+    // the Wayland compositor released the buffer early, we can reuse it
+    mInProgressBuffer = std::move(mFrontBuffer);
+    mFrontBuffer = nullptr;
+  } else {
+    mInProgressBuffer = mSurfacePoolHandle->ObtainBufferFromPool(mSize);
+  }
+
+  if (!mInProgressBuffer) {
+    gfxCriticalError() << "Failed to obtain buffer";
+    wr::RenderThread::Get()->HandleWebRenderError(
+        wr::WebRenderError::NEW_SURFACE);
+    return Nothing();
+  }
+
+  // get the framebuffer before handling partial damage so we don't accidently
+  // create one without depth buffer
+  Maybe<GLuint> fbo = mSurfacePoolHandle->GetFramebufferForBuffer(
+      mInProgressBuffer, aNeedsDepth);
+  MOZ_RELEASE_ASSERT(fbo, "GetFramebufferForBuffer failed.");
+
+  if (mFrontBuffer) {
+    HandlePartialUpdate(lock);
+    mSurfacePoolHandle->ReturnBufferToPool(mFrontBuffer);
+    mFrontBuffer = nullptr;
+  }
+
+  return fbo;
+}
+
+void NativeLayerWayland::HandlePartialUpdate(
+    const MutexAutoLock& aProofOfLock) {
+  IntRegion copyRegion = IntRegion(mDisplayRect);
+  copyRegion.SubOut(mDirtyRegion);
+
+  if (!copyRegion.IsEmpty()) {
+    if (mSurfacePoolHandle->gl()) {
+      mSurfacePoolHandle->gl()->MakeCurrent();
+      for (auto iter = copyRegion.RectIter(); !iter.Done(); iter.Next()) {
+        gfx::IntRect r = iter.Get();
+        Maybe<GLuint> sourceFB =
+            mSurfacePoolHandle->GetFramebufferForBuffer(mFrontBuffer, false);
+        Maybe<GLuint> destFB = mSurfacePoolHandle->GetFramebufferForBuffer(
+            mInProgressBuffer, false);
+        MOZ_RELEASE_ASSERT(sourceFB && destFB);
+        mSurfacePoolHandle->gl()->BlitHelper()->BlitFramebufferToFramebuffer(
+            sourceFB.value(), destFB.value(), r, r, LOCAL_GL_NEAREST);
+      }
+    } else {
+      RefPtr<gfx::DataSourceSurface> dataSourceSurface =
+          gfx::CreateDataSourceSurfaceFromData(
+              mSize, mFrontBuffer->GetSurfaceFormat(),
+              (const uint8_t*)mFrontBuffer->GetImageData(),
+              mSize.width * BytesPerPixel(mFrontBuffer->GetSurfaceFormat()));
+      RefPtr<DrawTarget> dt = mInProgressBuffer->Lock();
+
+      for (auto iter = copyRegion.RectIter(); !iter.Done(); iter.Next()) {
+        IntRect r = iter.Get();
+        dt->CopySurface(dataSourceSurface, r, IntPoint(r.x, r.y));
+      }
+    }
+  }
+}
+
+void NativeLayerWayland::NotifySurfaceReady() {
+  MOZ_ASSERT(!mFrontBuffer);
+  MOZ_ASSERT(mInProgressBuffer);
+  mFrontBuffer = mInProgressBuffer;
+  mInProgressBuffer = nullptr;
+}
+
+void NativeLayerWayland::DiscardBackbuffers() {}
+
+void NativeLayerWayland::Commit() {
+  MutexAutoLock lock(mMutex);
+
+  if (mDirtyRegion.IsEmpty() && mHasBufferAttached) {
+    wl_surface_commit(mWlSurface);
+    return;
+  }
+
+  for (auto iter = mDirtyRegion.RectIter(); !iter.Done(); iter.Next()) {
+    IntRect r = iter.Get();
+    wl_surface_damage_buffer(mWlSurface, r.x, r.y, r.width, r.height);
+  }
+
+  MOZ_ASSERT(mFrontBuffer);
+  mFrontBuffer->AttachAndCommit(mWlSurface);
+  mHasBufferAttached = true;
+  mDirtyRegion.SetEmpty();
+}
+
+void NativeLayerWayland::Unmap() {
+  MutexAutoLock lock(mMutex);
+
+  if (!mHasBufferAttached) {
+    return;
+  }
+
+  wl_surface_attach(mWlSurface, nullptr, 0, 0);
+  wl_surface_commit(mWlSurface);
+  mHasBufferAttached = false;
+}
+
+void NativeLayerWayland::EnsureParentSurface(wl_surface* aParentSurface) {
+  MutexAutoLock lock(mMutex);
+
+  if (aParentSurface != mParentWlSurface) {
+    MozClearPointer(mWlSubsurface, wl_subsurface_destroy);
+    mSubsurfacePosition = IntPoint(0, 0);
+
+    if (aParentSurface) {
+      wl_subcompositor* subcompositor =
+          widget::WaylandDisplayGet()->GetSubcompositor();
+      mWlSubsurface = wl_subcompositor_get_subsurface(subcompositor, mWlSurface,
+                                                      aParentSurface);
+    }
+    mParentWlSurface = aParentSurface;
+  }
+}
+
+void NativeLayerWayland::SetBufferTransformFlipped(bool aFlippedX,
+                                                   bool aFlippedY) {
+  MutexAutoLock lock(mMutex);
+
+  if (aFlippedX == mBufferTransformFlippedX &&
+      aFlippedY == mBufferTransformFlippedY) {
+    return;
+  }
+
+  mBufferTransformFlippedX = aFlippedX;
+  mBufferTransformFlippedY = aFlippedY;
+
+  if (mBufferTransformFlippedY) {
+    if (mBufferTransformFlippedX) {
+      wl_surface_set_buffer_transform(mWlSurface, WL_OUTPUT_TRANSFORM_180);
+    } else {
+      wl_surface_set_buffer_transform(mWlSurface,
+                                      WL_OUTPUT_TRANSFORM_FLIPPED_180);
+    }
+  } else {
+    if (mBufferTransformFlippedX) {
+      wl_surface_set_buffer_transform(mWlSurface, WL_OUTPUT_TRANSFORM_FLIPPED);
+    } else {
+      wl_surface_set_buffer_transform(mWlSurface, WL_OUTPUT_TRANSFORM_NORMAL);
+    }
+  }
+}
+
+void NativeLayerWayland::SetSubsurfacePosition(int aX, int aY) {
+  MutexAutoLock lock(mMutex);
+
+  if ((aX == mSubsurfacePosition.x && aY == mSubsurfacePosition.y) ||
+      !mWlSubsurface) {
+    return;
+  }
+
+  mSubsurfacePosition.x = aX;
+  mSubsurfacePosition.y = aY;
+  wl_subsurface_set_position(mWlSubsurface, mSubsurfacePosition.x,
+                             mSubsurfacePosition.y);
+}
+
+void NativeLayerWayland::SetViewportSourceRect(const Rect aSourceRect) {
+  MutexAutoLock lock(mMutex);
+
+  Rect bufferRect = Rect(0, 0, mSize.width, mSize.height);
+  Rect sourceRect = aSourceRect.Intersect(bufferRect);
+
+  if (mViewportSourceRect == sourceRect) {
+    return;
+  }
+
+  mViewportSourceRect = sourceRect;
+  wp_viewport_set_source(mViewport, wl_fixed_from_double(mViewportSourceRect.x),
+                         wl_fixed_from_double(mViewportSourceRect.y),
+                         wl_fixed_from_double(mViewportSourceRect.width),
+                         wl_fixed_from_double(mViewportSourceRect.height));
+}
+
+void NativeLayerWayland::SetViewportDestinationSize(int aWidth, int aHeight) {
+  MutexAutoLock lock(mMutex);
+
+  if (aWidth == mViewportDestinationSize.width &&
+      aHeight == mViewportDestinationSize.height) {
+    return;
+  }
+
+  mViewportDestinationSize.width = aWidth;
+  mViewportDestinationSize.height = aHeight;
+  wp_viewport_set_destination(mViewport, mViewportDestinationSize.width,
+                              mViewportDestinationSize.height);
+}
+
+void NativeLayerWayland::RequestFrameCallback(
+    const RefPtr<CallbackMultiplexHelper>& aMultiplexHelper) {
+  MutexAutoLock lock(mMutex);
+  MOZ_ASSERT(aMultiplexHelper->IsActive());
+
+  // Avoid piling up old helpers if this surface does not receive callbacks
+  // for a longer time
+  mCallbackMultiplexHelpers.RemoveElementsBy(
+      [&](const auto& object) { return !object->IsActive(); });
+
+  mCallbackMultiplexHelpers.AppendElement(aMultiplexHelper);
+  if (!mCallback) {
+    mCallback = wl_surface_frame(mWlSurface);
+    wl_callback_add_listener(mCallback, &sFrameListenerNativeLayerWayland,
+                             this);
+    wl_surface_commit(mWlSurface);
+  }
+}
+
+void NativeLayerWayland::FrameCallbackHandler(wl_callback* aCallback,
+                                              uint32_t aTime) {
+  MutexAutoLock lock(mMutex);
+
+  MOZ_RELEASE_ASSERT(aCallback == mCallback);
+  MozClearPointer(mCallback, wl_callback_destroy);
+
+  for (const RefPtr<CallbackMultiplexHelper>& callbackMultiplexHelper :
+       mCallbackMultiplexHelpers) {
+    callbackMultiplexHelper->Callback(aTime);
+  }
+  mCallbackMultiplexHelpers.Clear();
+}
+
+/* static */
+void NativeLayerWayland::FrameCallbackHandler(void* aData,
+                                              wl_callback* aCallback,
+                                              uint32_t aTime) {
+  auto surface = reinterpret_cast<NativeLayerWayland*>(aData);
+  surface->FrameCallbackHandler(aCallback, aTime);
+}
+
+}  // namespace mozilla::layers