firefox/mozilla-1552590.patch

changeset:   474982:24c0dda573b3
parent:      474915:839cdad764d7
user:        Martin Stransky <stransky@redhat.com>
date:        Fri May 17 11:24:33 2019 +0200
summary:     Implement dmabuf surfaces

diff --git a/gfx/2d/WaylandDMABufSurface.cpp b/gfx/2d/WaylandDMABufSurface.cpp
new file mode 100644
--- /dev/null
+++ b/gfx/2d/WaylandDMABufSurface.cpp
@@ -0,0 +1,274 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+// Based on weston/simple-dmabuf-egl.c
+
+#include "WaylandDMABufSurface.h"
+
+#include <fcntl.h>
+#include <getopt.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <dlfcn.h>
+
+#include <gbm.h>
+
+using namespace mozilla;
+using namespace mozilla::widget;
+
+#ifndef DRM_FORMAT_MOD_INVALID
+#  define DRM_FORMAT_MOD_INVALID ((1ULL << 56) - 1)
+#endif
+#define BUFFER_FLAGS 0
+
+bool WaylandDMABufSurface::mAvailable = false;
+bool WaylandDMABufSurface::mInitialized = false;
+
+bool WaylandDMABufSurface::IsAvailable() {
+  if (!mInitialized) {
+    mInitialized = true;
+    if (!nsGbmLib::IsAvailable()) {
+      return false;
+    }
+
+    // Test Alpha and non-alpha formats
+    nsWaylandDisplay* display = WaylandDisplayGet();
+    if (!display->GetGbmFormat(false) || !display->GetGbmFormat(true)) {
+      return false;
+    }
+    mAvailable = true;
+  }
+  return static_cast<bool>(mAvailable);
+}
+
+static void buffer_release(void* data, wl_buffer* buffer) {
+  auto surface = reinterpret_cast<WaylandDMABufSurface*>(data);
+  surface->WLBufferDetach();
+}
+
+static const struct wl_buffer_listener buffer_listener = {buffer_release};
+
+static void buffer_created(void* data,
+                           struct zwp_linux_buffer_params_v1* params,
+                           struct wl_buffer* new_buffer) {
+  auto surface = static_cast<WaylandDMABufSurface*>(data);
+
+  surface->SetWLBuffer(new_buffer);
+
+  nsWaylandDisplay* display = WaylandDisplayGet();
+  /* When not using explicit synchronization listen to wl_buffer.release
+   * for release notifications, otherwise we are going to use
+   * zwp_linux_buffer_release_v1. */
+  if (!display->IsExplicitSyncEnabled()) {
+    wl_buffer_add_listener(new_buffer, &buffer_listener, surface);
+  }
+  zwp_linux_buffer_params_v1_destroy(params);
+}
+
+static void buffer_create_failed(void* data,
+                                 struct zwp_linux_buffer_params_v1* params) {
+  zwp_linux_buffer_params_v1_destroy(params);
+}
+
+static const struct zwp_linux_buffer_params_v1_listener params_listener = {
+    buffer_created, buffer_create_failed};
+
+WaylandDMABufSurface::WaylandDMABufSurface()
+    : mWidth(0),
+      mHeight(0),
+      mGmbFormat(nullptr),
+      mWLBuffer(nullptr),
+      mMappedRegion(nullptr),
+      mGbmBufferObject(nullptr),
+      mBufferModifier(DRM_FORMAT_MOD_INVALID),
+      mBufferPlaneCount(1),
+      mWLBufferAttached(false),
+      mFastWLBufferCreation(true) {
+  for (int i = 0; i < DMABUF_BUFFER_PLANES; i++) {
+    mDmabufFds[i] = -1;
+    mStrides[i] = 0;
+    mOffsets[i] = 0;
+  }
+}
+
+WaylandDMABufSurface::~WaylandDMABufSurface() { Release(); }
+
+bool WaylandDMABufSurface::Create(int aWidth, int aHeight, bool aHasAlpha) {
+  MOZ_ASSERT(mWLBuffer == nullptr);
+
+  mWidth = aWidth;
+  mHeight = aHeight;
+
+  nsWaylandDisplay* display = WaylandDisplayGet();
+  mGmbFormat = display->GetGbmFormat(aHasAlpha);
+  if (!mGmbFormat) {
+    // Requested DRM format is not supposed.
+    return false;
+  }
+
+#ifdef HAVE_GBM_MODIFIERS
+  if (nsGbmLib::IsModifierAvailable() && mGmbFormat->mModifiersCount > 0) {
+    mGbmBufferObject = nsGbmLib::CreateWithModifiers(
+        display->GetGbmDevice(), mWidth, mHeight, mGmbFormat->mFormat,
+        mGmbFormat->mModifiers, mGmbFormat->mModifiersCount);
+    if (mGbmBufferObject) {
+      mBufferModifier = nsGbmLib::GetModifier(mGbmBufferObject);
+    }
+  }
+#endif
+
+  if (!mGbmBufferObject) {
+    mGbmBufferObject =
+        nsGbmLib::Create(display->GetGbmDevice(), mWidth, mHeight,
+                         mGmbFormat->mFormat, GBM_BO_USE_RENDERING);
+  }
+
+  if (!mGbmBufferObject) {
+    return false;
+  }
+
+#ifdef HAVE_GBM_MODIFIERS
+  if (nsGbmLib::IsModifierAvailable()) {
+    mBufferPlaneCount = nsGbmLib::GetPlaneCount(mGbmBufferObject);
+    for (int i = 0; i < mBufferPlaneCount; i++) {
+      uint32_t handle = nsGbmLib::GetHandleForPlane(mGbmBufferObject, i).u32;
+      int ret = nsGbmLib::DrmPrimeHandleToFD(display->GetGbmDeviceFd(), handle,
+                                             0, &mDmabufFds[i]);
+      if (ret < 0 || mDmabufFds[i] < 0) {
+        Release();
+        return false;
+      }
+      mStrides[i] = nsGbmLib::GetStrideForPlane(mGbmBufferObject, i);
+      mOffsets[i] = nsGbmLib::GetOffset(mGbmBufferObject, i);
+    }
+  } else
+#endif
+  {
+    mBufferPlaneCount = 1;
+    mStrides[0] = nsGbmLib::GetStride(mGbmBufferObject);
+    mDmabufFds[0] = nsGbmLib::GetFd(mGbmBufferObject);
+    if (mDmabufFds[0] < 0) {
+      Release();
+      return false;
+    }
+  }
+
+  struct zwp_linux_buffer_params_v1* params =
+      zwp_linux_dmabuf_v1_create_params(display->GetDmabuf());
+  for (int i = 0; i < mBufferPlaneCount; i++) {
+    zwp_linux_buffer_params_v1_add(params, mDmabufFds[i], i, mOffsets[i],
+                                   mStrides[i], mBufferModifier >> 32,
+                                   mBufferModifier & 0xffffffff);
+  }
+  zwp_linux_buffer_params_v1_add_listener(params, &params_listener, this);
+
+  if (mFastWLBufferCreation) {
+    mWLBuffer = zwp_linux_buffer_params_v1_create_immed(
+        params, mWidth, mHeight, mGmbFormat->mFormat, BUFFER_FLAGS);
+    /* When not using explicit synchronization listen to
+     * wl_buffer.release for release notifications, otherwise we
+     * are going to use zwp_linux_buffer_release_v1. */
+    if (!display->IsExplicitSyncEnabled()) {
+      wl_buffer_add_listener(mWLBuffer, &buffer_listener, this);
+    }
+  } else {
+    zwp_linux_buffer_params_v1_create(params, mWidth, mHeight,
+                                      mGmbFormat->mFormat, BUFFER_FLAGS);
+  }
+
+  return true;
+}
+
+void WaylandDMABufSurface::Release() {
+  MOZ_ASSERT(!IsMapped(), "We can't release mapped buffer!");
+
+  if (mWLBuffer) {
+    wl_buffer_destroy(mWLBuffer);
+    mWLBuffer = nullptr;
+  }
+
+  if (mGbmBufferObject) {
+    nsGbmLib::Destroy(mGbmBufferObject);
+    mGbmBufferObject = nullptr;
+  }
+
+  for (int i = 0; i < mBufferPlaneCount; i++) {
+    if (mDmabufFds[i] >= 0) {
+      close(mDmabufFds[i]);
+      mDmabufFds[i] = 0;
+    }
+  }
+}
+
+void* WaylandDMABufSurface::MapReadOnly(uint32_t aX, uint32_t aY,
+                                        uint32_t aWidth, uint32_t aHeight,
+                                        uint32_t* aStride) {
+  NS_ASSERTION(mMappedRegion == nullptr, "Already mapped?");
+  void* map_data = nullptr;
+  *aStride = 0;
+  mMappedRegion = nsGbmLib::Map(mGbmBufferObject, aX, aY, aWidth, aHeight,
+                                GBM_BO_TRANSFER_READ, aStride, &map_data);
+  return mMappedRegion;
+}
+
+void* WaylandDMABufSurface::MapReadOnly(uint32_t* aStride) {
+  return MapReadOnly(0, 0, mWidth, mHeight, aStride);
+}
+
+void* WaylandDMABufSurface::Map(uint32_t aX, uint32_t aY, uint32_t aWidth,
+                                uint32_t aHeight, uint32_t* aStride) {
+  NS_ASSERTION(mMappedRegion == nullptr, "Already mapped?");
+  void* map_data = nullptr;
+  *aStride = 0;
+  mMappedRegion = nsGbmLib::Map(mGbmBufferObject, aX, aY, aWidth, aHeight,
+                                GBM_BO_TRANSFER_READ_WRITE, aStride, &map_data);
+  return mMappedRegion;
+}
+
+void* WaylandDMABufSurface::Map(uint32_t* aStride) {
+  return Map(0, 0, mWidth, mHeight, aStride);
+}
+
+void WaylandDMABufSurface::Unmap() {
+  if (mMappedRegion) {
+    nsGbmLib::Unmap(mGbmBufferObject, mMappedRegion);
+    mMappedRegion = nullptr;
+  }
+}
+
+bool WaylandDMABufSurface::Resize(int aWidth, int aHeight) {
+  if (aWidth == mWidth && aHeight == mHeight) {
+    return true;
+  }
+
+  if (IsMapped()) {
+    NS_WARNING("We can't resize mapped surface!");
+    return false;
+  }
+
+  Release();
+  return Create(aWidth, aHeight, mGmbFormat->mHasAlpha);
+}
+
+bool WaylandDMABufSurface::CopyFrom(
+    class WaylandDMABufSurface* aSourceSurface) {
+  // Not implemented - we should not call that.
+  MOZ_CRASH();
+}
+
+// TODO - EGL clear
+void WaylandDMABufSurface::Clear() {
+  uint32_t destStride;
+  void* destData = Map(&destStride);
+  memset(destData, 0, GetHeight() * destStride);
+  Unmap();
+}
diff --git a/gfx/2d/WaylandDMABufSurface.h b/gfx/2d/WaylandDMABufSurface.h
new file mode 100644
--- /dev/null
+++ b/gfx/2d/WaylandDMABufSurface.h
@@ -0,0 +1,73 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef WaylandDMABufSurface_h__
+#define WaylandDMABufSurface_h__
+
+#include <stdint.h>
+#include "mozilla/widget/nsWaylandDisplay.h"
+
+#define DMABUF_BUFFER_PLANES 4
+
+class WaylandDMABufSurface {
+ public:
+  static bool IsAvailable();
+
+  bool CreateFrameBuffer(int aWidth, int aHeight);
+  bool CreateEGLImage(int aWidth, int aHeight);
+
+  bool Create(int aWidth, int aHeight, bool aHasAlpha = true);
+  bool Resize(int aWidth, int aHeight);
+  void Release();
+  void Clear();
+
+  bool CopyFrom(class WaylandDMABufSurface* aSourceSurface);
+
+  int GetWidth() { return mWidth; };
+  int GetHeight() { return mHeight; };
+
+  void* MapReadOnly(uint32_t aX, uint32_t aY, uint32_t aWidth, uint32_t aHeight,
+                    uint32_t* aStride);
+  void* MapReadOnly(uint32_t* aStride);
+  void* Map(uint32_t aX, uint32_t aY, uint32_t aWidth, uint32_t aHeight,
+            uint32_t* aStride);
+  void* Map(uint32_t* aStride);
+  bool IsMapped() { return mMappedRegion; };
+  void Unmap();
+
+  void SetWLBuffer(struct wl_buffer* aWLBuffer) { mWLBuffer = aWLBuffer; };
+  wl_buffer* GetWLBuffer() { return mWLBuffer; };
+
+  void WLBufferDetach() { mWLBufferAttached = false; };
+  bool WLBufferIsAttached() { return mWLBufferAttached; };
+  void WLBufferSetAttached() { mWLBufferAttached = true; };
+
+  WaylandDMABufSurface();
+  ~WaylandDMABufSurface();
+
+ private:
+  int mWidth;
+  int mHeight;
+  mozilla::widget::GbmFormat* mGmbFormat;
+
+  wl_buffer* mWLBuffer;
+  void* mMappedRegion;
+
+  struct gbm_bo* mGbmBufferObject;
+  uint64_t mBufferModifier;
+  int mBufferPlaneCount;
+  int mDmabufFds[DMABUF_BUFFER_PLANES];
+  uint32_t mStrides[DMABUF_BUFFER_PLANES];
+  uint32_t mOffsets[DMABUF_BUFFER_PLANES];
+
+  bool mWLBufferAttached;
+  bool mFastWLBufferCreation;
+
+  static bool mAvailable;
+  static bool mInitialized;
+};
+
+#endif
diff --git a/gfx/2d/moz.build b/gfx/2d/moz.build
--- a/gfx/2d/moz.build
+++ b/gfx/2d/moz.build
@@ -255,8 +255,20 @@ if CONFIG['MOZ_ENABLE_SKIA']:
         '/gfx/skia/skia/include/private',
         '/gfx/skia/skia/src/core',
         '/gfx/skia/skia/src/image',
     ]
 if CONFIG['MOZ_ENABLE_SKIA_GPU']:
     LOCAL_INCLUDES += [
         '/gfx/skia/skia/src/gpu',
     ]
+
+#if CONFIG['MOZ_WAYLAND'] and CONFIG['HAVE_LIBDRM']:
+if CONFIG['HAVE_LIBDRM']:
+    SOURCES += [
+        'WaylandDMABufSurface.cpp',
+    ]
+    EXPORTS.mozilla.gfx += [
+        'WaylandDMABufSurface.h',
+    ]
+    CFLAGS += CONFIG['TK_CFLAGS']
+    CXXFLAGS += CONFIG['TK_CFLAGS']
+
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -5091,16 +5091,21 @@ pref("gfx.apitrace.enabled",false);
 
 #ifdef MOZ_X11
 #ifdef MOZ_WIDGET_GTK
 pref("gfx.xrender.enabled",false);
 pref("widget.chrome.allow-gtk-dark-theme", false);
 pref("widget.content.allow-gtk-dark-theme", false);
 #endif
 #endif
+#ifdef MOZ_WAYLAND
+#ifdef HAVE_LIBDRM
+pref("gfx.wayland_dmabuf_backend.enabled", false);
+#endif
+#endif
 
 pref("widget.window-transforms.disabled", false);
 
 #ifdef XP_WIN
 // Whether to disable the automatic detection and use of direct2d.
 pref("gfx.direct2d.disabled", false);
 
 // Whether to attempt to enable Direct2D regardless of automatic detection or
diff --git a/toolkit/moz.configure b/toolkit/moz.configure
--- a/toolkit/moz.configure
+++ b/toolkit/moz.configure
@@ -260,16 +260,24 @@ def wayland_headers(wayland, toolkit_gtk
     if toolkit_gtk and artifacts:
         return True
     return wayland
 
 
 set_config('MOZ_WAYLAND', depends_if(wayland_headers)(lambda _: True))
 set_define('MOZ_WAYLAND', depends_if(wayland_headers)(lambda _: True))
 
+drm_headers = pkg_check_modules('HAVE_LIBDRM', 'libdrm > 2.4', when=wayland_headers)
+set_config('HAVE_LIBDRM', depends_if(drm_headers)(lambda _: True))
+set_define('HAVE_LIBDRM', depends_if(drm_headers)(lambda _: True))
+
+gbm_modifiers = pkg_check_modules('HAVE_GBM_MODIFIERS', 'gbm >= 17.1', when=drm_headers)
+set_config('HAVE_GBM_MODIFIERS', depends_if(gbm_modifiers)(lambda _: True))
+set_define('HAVE_GBM_MODIFIERS', depends_if(gbm_modifiers)(lambda _: True))
+
 # GL Provider
 # ==============================================================
 option('--with-gl-provider', nargs=1, help='Set GL provider backend type')
 
 @depends('--with-gl-provider')
 def gl_provider(value):
     if value:
         return value[0]
diff --git a/widget/gtk/WindowSurfaceWayland.cpp b/widget/gtk/WindowSurfaceWayland.cpp
--- a/widget/gtk/WindowSurfaceWayland.cpp
+++ b/widget/gtk/WindowSurfaceWayland.cpp
@@ -30,16 +30,19 @@ extern mozilla::LazyLogModule gWidgetWay
     MOZ_LOG(gWidgetWaylandLog, mozilla::LogLevel::Debug, args)
 #else
 #  define LOGWAYLAND(args)
 #endif /* MOZ_LOGGING */
 
 namespace mozilla {
 namespace widget {
 
+bool WindowSurfaceWayland::mUseDMABuf = false;
+bool WindowSurfaceWayland::mUseDMABufInitialized = false;
+
 /*
   Wayland multi-thread rendering scheme
 
   Every rendering thread (main thread, compositor thread) contains its own
   nsWaylandDisplay object connected to Wayland compositor (Mutter, Weston, etc.)
 
   WindowSurfaceWayland implements WindowSurface class and draws nsWindow by
   WindowSurface interface (Lock, Commit) to screen through nsWaylandDisplay.
@@ -255,120 +258,183 @@ WaylandShmPool::~WaylandShmPool() {
 
 static void buffer_release(void* data, wl_buffer* buffer) {
   auto surface = reinterpret_cast<WindowBackBuffer*>(data);
   surface->Detach(buffer);
 }
 
 static const struct wl_buffer_listener buffer_listener = {buffer_release};
 
-void WindowBackBuffer::Create(int aWidth, int aHeight) {
+void WindowBackBufferShm::Create(int aWidth, int aHeight) {
   MOZ_ASSERT(!IsAttached(), "We can't resize attached buffers.");
 
   int newBufferSize = aWidth * aHeight * BUFFER_BPP;
   mShmPool.Resize(newBufferSize);
 
   mWaylandBuffer =
       wl_shm_pool_create_buffer(mShmPool.GetShmPool(), 0, aWidth, aHeight,
                                 aWidth * BUFFER_BPP, WL_SHM_FORMAT_ARGB8888);
   wl_proxy_set_queue((struct wl_proxy*)mWaylandBuffer,
-                     mWaylandDisplay->GetEventQueue());
+                     GetWaylandDisplay()->GetEventQueue());
   wl_buffer_add_listener(mWaylandBuffer, &buffer_listener, this);
 
   mWidth = aWidth;
   mHeight = aHeight;
 
   LOGWAYLAND((
       "%s [%p] wl_buffer %p ID %d\n", __PRETTY_FUNCTION__, (void*)this,
       (void*)mWaylandBuffer,
       mWaylandBuffer ? wl_proxy_get_id((struct wl_proxy*)mWaylandBuffer) : -1));
 }
 
-void WindowBackBuffer::Release() {
+void WindowBackBufferShm::Release() {
   LOGWAYLAND(("%s [%p]\n", __PRETTY_FUNCTION__, (void*)this));
 
   wl_buffer_destroy(mWaylandBuffer);
   mWidth = mHeight = 0;
 }
 
-void WindowBackBuffer::Clear() {
+void WindowBackBufferShm::Clear() {
   memset(mShmPool.GetImageData(), 0, mHeight * mWidth * BUFFER_BPP);
 }
 
-WindowBackBuffer::WindowBackBuffer(nsWaylandDisplay* aWaylandDisplay,
-                                   int aWidth, int aHeight)
-    : mShmPool(aWaylandDisplay, aWidth * aHeight * BUFFER_BPP),
+WindowBackBufferShm::WindowBackBufferShm(nsWaylandDisplay* aWaylandDisplay,
+                                         int aWidth, int aHeight)
+    : WindowBackBuffer(aWaylandDisplay),
+      mShmPool(aWaylandDisplay, aWidth * aHeight * BUFFER_BPP),
       mWaylandBuffer(nullptr),
       mWidth(aWidth),
       mHeight(aHeight),
-      mAttached(false),
-      mWaylandDisplay(aWaylandDisplay) {
+      mAttached(false) {
   Create(aWidth, aHeight);
 }
 
-WindowBackBuffer::~WindowBackBuffer() { Release(); }
+WindowBackBufferShm::~WindowBackBufferShm() { Release(); }
 
-bool WindowBackBuffer::Resize(int aWidth, int aHeight) {
+bool WindowBackBufferShm::Resize(int aWidth, int aHeight) {
   if (aWidth == mWidth && aHeight == mHeight) return true;
 
   LOGWAYLAND(
       ("%s [%p] %d %d\n", __PRETTY_FUNCTION__, (void*)this, aWidth, aHeight));
 
   Release();
   Create(aWidth, aHeight);
 
   return (mWaylandBuffer != nullptr);
 }
 
 void WindowBackBuffer::Attach(wl_surface* aSurface) {
-  LOGWAYLAND((
-      "%s [%p] wl_surface %p ID %d wl_buffer %p ID %d\n", __PRETTY_FUNCTION__,
-      (void*)this, (void*)aSurface,
-      aSurface ? wl_proxy_get_id((struct wl_proxy*)aSurface) : -1,
-      (void*)mWaylandBuffer,
-      mWaylandBuffer ? wl_proxy_get_id((struct wl_proxy*)mWaylandBuffer) : -1));
+  LOGWAYLAND(
+      ("%s [%p] wl_surface %p ID %d wl_buffer %p ID %d\n", __PRETTY_FUNCTION__,
+       (void*)this, (void*)aSurface,
+       aSurface ? wl_proxy_get_id((struct wl_proxy*)aSurface) : -1,
+       (void*)GetWlBuffer(),
+       GetWlBuffer() ? wl_proxy_get_id((struct wl_proxy*)GetWlBuffer()) : -1));
 
-  wl_surface_attach(aSurface, mWaylandBuffer, 0, 0);
+  wl_surface_attach(aSurface, GetWlBuffer(), 0, 0);
   wl_surface_commit(aSurface);
-  wl_display_flush(mWaylandDisplay->GetDisplay());
-  mAttached = true;
+  wl_display_flush(GetWaylandDisplay()->GetDisplay());
+  SetAttached();
 }
 
-void WindowBackBuffer::Detach(wl_buffer* aBuffer) {
+void WindowBackBufferShm::Detach(wl_buffer* aBuffer) {
   LOGWAYLAND(("%s [%p] wl_buffer %p ID %d\n", __PRETTY_FUNCTION__, (void*)this,
               (void*)aBuffer,
               aBuffer ? wl_proxy_get_id((struct wl_proxy*)aBuffer) : -1));
 
   mAttached = false;
 }
 
-bool WindowBackBuffer::SetImageDataFromBuffer(
+bool WindowBackBufferShm::SetImageDataFromBuffer(
     class WindowBackBuffer* aSourceBuffer) {
-  if (!IsMatchingSize(aSourceBuffer)) {
-    Resize(aSourceBuffer->mWidth, aSourceBuffer->mHeight);
+  auto sourceBuffer = static_cast<class WindowBackBufferShm*>(aSourceBuffer);
+  if (!IsMatchingSize(sourceBuffer)) {
+    Resize(sourceBuffer->mWidth, sourceBuffer->mHeight);
   }
 
   mShmPool.SetImageDataFromPool(
-      &aSourceBuffer->mShmPool,
-      aSourceBuffer->mWidth * aSourceBuffer->mHeight * BUFFER_BPP);
+      &sourceBuffer->mShmPool,
+      sourceBuffer->mWidth * sourceBuffer->mHeight * BUFFER_BPP);
   return true;
 }
 
-already_AddRefed<gfx::DrawTarget> WindowBackBuffer::Lock() {
+already_AddRefed<gfx::DrawTarget> WindowBackBufferShm::Lock() {
   LOGWAYLAND((
       "%s [%p] [%d x %d] wl_buffer %p ID %d\n", __PRETTY_FUNCTION__,
       (void*)this, mWidth, mHeight, (void*)mWaylandBuffer,
       mWaylandBuffer ? wl_proxy_get_id((struct wl_proxy*)mWaylandBuffer) : -1));
 
   gfx::IntSize lockSize(mWidth, mHeight);
   return gfxPlatform::CreateDrawTargetForData(
       static_cast<unsigned char*>(mShmPool.GetImageData()), lockSize,
-      BUFFER_BPP * mWidth, mFormat);
+      BUFFER_BPP * mWidth, GetSurfaceFormat());
+}
+
+#ifdef HAVE_LIBDRM
+WindowBackBufferDMABuf::WindowBackBufferDMABuf(
+    nsWaylandDisplay* aWaylandDisplay, int aWidth, int aHeight)
+    : WindowBackBuffer(aWaylandDisplay) {
+  mDMAbufSurface.Create(aWidth, aHeight);
+}
+
+WindowBackBufferDMABuf::~WindowBackBufferDMABuf() { mDMAbufSurface.Release(); }
+
+already_AddRefed<gfx::DrawTarget> WindowBackBufferDMABuf::Lock() {
+  LOGWAYLAND(
+      ("%s [%p] [%d x %d] wl_buffer %p ID %d\n", __PRETTY_FUNCTION__,
+       (void*)this, GetWidth(), GetHeight(), (void*)GetWlBuffer(),
+       GetWlBuffer() ? wl_proxy_get_id((struct wl_proxy*)GetWlBuffer()) : -1));
+
+  uint32_t stride;
+  void* pixels = mDMAbufSurface.Map(&stride);
+  gfx::IntSize lockSize(GetWidth(), GetHeight());
+  return gfxPlatform::CreateDrawTargetForData(
+      static_cast<unsigned char*>(pixels), lockSize, stride,
+      GetSurfaceFormat());
+}
+
+void WindowBackBufferDMABuf::Unlock() { mDMAbufSurface.Unmap(); }
+
+bool WindowBackBufferDMABuf::IsAttached() {
+  return mDMAbufSurface.WLBufferIsAttached();
 }
 
+void WindowBackBufferDMABuf::SetAttached() {
+  return mDMAbufSurface.WLBufferSetAttached();
+}
+
+int WindowBackBufferDMABuf::GetWidth() { return mDMAbufSurface.GetWidth(); }
+
+int WindowBackBufferDMABuf::GetHeight() { return mDMAbufSurface.GetHeight(); }
+
+wl_buffer* WindowBackBufferDMABuf::GetWlBuffer() {
+  return mDMAbufSurface.GetWLBuffer();
+}
+
+bool WindowBackBufferDMABuf::IsLocked() { return mDMAbufSurface.IsMapped(); }
+
+bool WindowBackBufferDMABuf::Resize(int aWidth, int aHeight) {
+  return mDMAbufSurface.Resize(aWidth, aHeight);
+}
+
+bool WindowBackBufferDMABuf::SetImageDataFromBuffer(
+    class WindowBackBuffer* aSourceBuffer) {
+  WindowBackBufferDMABuf* source =
+      static_cast<WindowBackBufferDMABuf*>(aSourceBuffer);
+  mDMAbufSurface.CopyFrom(&source->mDMAbufSurface);
+  return true;
+}
+
+void WindowBackBufferDMABuf::Detach(wl_buffer* aBuffer) {
+  mDMAbufSurface.WLBufferDetach();
+}
+
+void WindowBackBufferDMABuf::Clear() { mDMAbufSurface.Clear(); }
+#endif
+
 static void frame_callback_handler(void* data, struct wl_callback* callback,
                                    uint32_t time) {
   auto surface = reinterpret_cast<WindowSurfaceWayland*>(data);
   surface->FrameCallbackHandler();
 
   gfxPlatformGtk::GetPlatform()->SetWaylandLastVsync(time);
 }
 
@@ -412,23 +478,60 @@ WindowSurfaceWayland::~WindowSurfaceWayl
 
   for (int i = 0; i < BACK_BUFFER_NUM; i++) {
     if (mBackupBuffer[i]) {
       delete mBackupBuffer[i];
     }
   }
 }
 
-WindowBackBuffer* WindowSurfaceWayland::GetWaylandBufferToDraw(int aWidth,
-                                                               int aHeight) {
+bool WindowSurfaceWayland::UseDMABufBackend() {
+  if (!mUseDMABufInitialized) {
+#ifdef HAVE_LIBDRM
+    if (WaylandDMABufSurface::IsAvailable()) {
+      mUseDMABuf =
+          Preferences::GetBool("gfx.wayland_dmabuf_backend.enabled", false);
+    }
+#endif
+    mUseDMABufInitialized = true;
+  }
+  return mUseDMABuf;
+}
+
+WindowBackBuffer* WindowSurfaceWayland::CreateWaylandBuffer(int aWidth,
+                                                            int aHeight) {
+  if (UseDMABufBackend()) {
+    static bool sDMABufBufferCreated = false;
+    WindowBackBuffer* buffer =
+        new WindowBackBufferDMABuf(mWaylandDisplay, aWidth, aHeight);
+    if (buffer) {
+      sDMABufBufferCreated = true;
+      return buffer;
+    }
+    // If this is the first failure and there's no dmabuf already active
+    // we can safely fallback to Shm. Otherwise we can't mix DMAbuf and
+    // SHM buffers so just fails now.
+    if (sDMABufBufferCreated) {
+      NS_WARNING("Failed to allocate DMABuf buffer!");
+      return nullptr;
+    } else {
+      NS_WARNING("Wayland DMABuf failed, switched back to Shm backend!");
+      mUseDMABuf = false;
+    }
+  }
+  return new WindowBackBufferShm(mWaylandDisplay, aWidth, aHeight);
+}
+
+WindowBackBuffer* WindowSurfaceWayland::GetWaylandBufferToDraw(
+    int aWidth, int aHeight, bool aFullScreenUpdate, bool aNoBackBufferCopy) {
   if (!mWaylandBuffer) {
     LOGWAYLAND(("%s [%p] Create [%d x %d]\n", __PRETTY_FUNCTION__, (void*)this,
                 aWidth, aHeight));
 
-    mWaylandBuffer = new WindowBackBuffer(mWaylandDisplay, aWidth, aHeight);
+    mWaylandBuffer = CreateWaylandBuffer(aWidth, aHeight);
     mWaitToFullScreenUpdate = true;
     return mWaylandBuffer;
   }
 
   if (!mWaylandBuffer->IsAttached()) {
     if (!mWaylandBuffer->IsMatchingSize(aWidth, aHeight)) {
       mWaylandBuffer->Resize(aWidth, aHeight);
       // There's a chance that scale factor has been changed
@@ -444,75 +547,89 @@ WindowBackBuffer* WindowSurfaceWayland::
   MOZ_ASSERT(!mPendingCommit,
              "Uncommitted buffer switch, screen artifacts ahead.");
 
   // Front buffer is used by compositor, select a back buffer
   int availableBuffer;
   for (availableBuffer = 0; availableBuffer < BACK_BUFFER_NUM;
        availableBuffer++) {
     if (!mBackupBuffer[availableBuffer]) {
-      mBackupBuffer[availableBuffer] =
-          new WindowBackBuffer(mWaylandDisplay, aWidth, aHeight);
+      mBackupBuffer[availableBuffer] = CreateWaylandBuffer(aWidth, aHeight);
       break;
     }
 
     if (!mBackupBuffer[availableBuffer]->IsAttached()) {
       break;
     }
   }
 
   if (MOZ_UNLIKELY(availableBuffer == BACK_BUFFER_NUM)) {
     LOGWAYLAND(("%s [%p] No drawing buffer available!\n", __PRETTY_FUNCTION__,
                 (void*)this));
     NS_WARNING("No drawing buffer available");
     return nullptr;
   }
 
+  bool bufferFlip = mWaylandBuffer->IsMatchingSize(aWidth, aHeight);
+  if (bufferFlip && aNoBackBufferCopy && !aFullScreenUpdate) {
+    LOGWAYLAND(("%s [%p] Delayed hard copy from old buffer [%d x %d]\n",
+                __PRETTY_FUNCTION__, (void*)this, aWidth, aHeight));
+    return nullptr;
+  }
+
   WindowBackBuffer* lastWaylandBuffer = mWaylandBuffer;
   mWaylandBuffer = mBackupBuffer[availableBuffer];
   mBackupBuffer[availableBuffer] = lastWaylandBuffer;
 
-  if (lastWaylandBuffer->IsMatchingSize(aWidth, aHeight)) {
-    LOGWAYLAND(("%s [%p] Copy from old buffer [%d x %d]\n", __PRETTY_FUNCTION__,
-                (void*)this, aWidth, aHeight));
+  if (bufferFlip) {
     // Former front buffer has the same size as a requested one.
     // Gecko may expect a content already drawn on screen so copy
-    // existing data to the new buffer.
-    mWaylandBuffer->SetImageDataFromBuffer(lastWaylandBuffer);
+    // existing data to the new buffer if we don't do fullscreen redraw.
+    if (!aFullScreenUpdate) {
+      LOGWAYLAND(("%s [%p] Copy from old buffer [%d x %d]\n",
+                  __PRETTY_FUNCTION__, (void*)this, aWidth, aHeight));
+      mWaylandBuffer->SetImageDataFromBuffer(lastWaylandBuffer);
+    }
     // When buffer switches we need to damage whole screen
     // (https://bugzilla.redhat.com/show_bug.cgi?id=1418260)
     mWaylandBufferFullScreenDamage = true;
   } else {
     LOGWAYLAND(("%s [%p] Resize to [%d x %d]\n", __PRETTY_FUNCTION__,
                 (void*)this, aWidth, aHeight));
     // Former buffer has different size from the new request. Only resize
     // the new buffer and leave gecko to render new whole content.
     mWaylandBuffer->Resize(aWidth, aHeight);
     mWaitToFullScreenUpdate = true;
   }
 
   return mWaylandBuffer;
 }
 
 already_AddRefed<gfx::DrawTarget> WindowSurfaceWayland::LockWaylandBuffer(
-    int aWidth, int aHeight, bool aClearBuffer) {
-  WindowBackBuffer* buffer = GetWaylandBufferToDraw(aWidth, aHeight);
+    int aWidth, int aHeight, bool aClearBuffer, bool aFullScreenUpdate,
+    bool aNoBackBufferCopy) {
+  WindowBackBuffer* buffer = GetWaylandBufferToDraw(
+      aWidth, aHeight, aFullScreenUpdate, aNoBackBufferCopy);
   if (!buffer) {
-    NS_WARNING(
-        "WindowSurfaceWayland::LockWaylandBuffer(): No buffer available");
+    if (!aNoBackBufferCopy) {
+      NS_WARNING(
+          "WindowSurfaceWayland::LockWaylandBuffer(): No buffer available");
+    }
     return nullptr;
   }
 
   if (aClearBuffer) {
     buffer->Clear();
   }
 
   return buffer->Lock();
 }
 
+void WindowSurfaceWayland::UnlockWaylandBuffer() { mWaylandBuffer->Unlock(); }
+
 already_AddRefed<gfx::DrawTarget> WindowSurfaceWayland::LockImageSurface(
     const gfx::IntSize& aLockSize) {
   if (!mImageSurface || mImageSurface->CairoStatus() ||
       !(aLockSize <= mImageSurface->GetSize())) {
     mImageSurface = new gfxImageSurface(
         aLockSize,
         SurfaceFormatToImageFormat(WindowBackBuffer::GetSurfaceFormat()));
     if (mImageSurface->CairoStatus()) {
@@ -552,20 +669,28 @@ already_AddRefed<gfx::DrawTarget> Window
 
   // Are we asked for entire nsWindow to draw?
   mDrawToWaylandBufferDirectly =
       (aRegion.GetNumRects() == 1 && bounds.x == 0 && bounds.y == 0 &&
        lockSize.width == screenRect.width &&
        lockSize.height == screenRect.height);
 
   if (mDrawToWaylandBufferDirectly) {
-    RefPtr<gfx::DrawTarget> dt =
-        LockWaylandBuffer(screenRect.width, screenRect.height,
-                          mWindow->WaylandSurfaceNeedsClear());
+    // If there's any pending image commit scratch them as we're going
+    // to redraw the whole sceen anyway.
+    mDelayedImageCommits.Clear();
+
+    bool needsClear = mWindow->WaylandSurfaceNeedsClear();
+    RefPtr<gfx::DrawTarget> dt = LockWaylandBuffer(
+        screenRect.width, screenRect.height, needsClear,
+        /* aFullScreenUpdate */ true, /* aNoBackBufferCopy */ true);
     if (dt) {
+      if (needsClear) {
+        mWindow->WaylandSurfaceCleared();
+      }
       // When we have a request to update whole screen at once
       // (surface was created, resized or changed somehow)
       // we also need update scale factor of the screen.
       if (mWaitToFullScreenUpdate) {
         mWaitToFullScreenUpdate = false;
         mNeedScaleFactorUpdate = true;
       }
       return dt.forget();
@@ -574,52 +699,94 @@ already_AddRefed<gfx::DrawTarget> Window
     // We don't have any front buffer available. Try indirect drawing
     // to mImageSurface which is mirrored to front buffer at commit.
     mDrawToWaylandBufferDirectly = false;
   }
 
   return LockImageSurface(lockSize);
 }
 
+void WindowImageSurface::Draw(gfx::SourceSurface* aSurface,
+                              gfx::DrawTarget* aDest,
+                              const LayoutDeviceIntRegion& aRegion) {
+  uint32_t numRects = aRegion.GetNumRects();
+  if (numRects != 1) {
+    AutoTArray<IntRect, 32> rects;
+    rects.SetCapacity(numRects);
+    for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) {
+      rects.AppendElement(iter.Get().ToUnknownRect());
+    }
+    aDest->PushDeviceSpaceClipRects(rects.Elements(), rects.Length());
+  }
+
+  gfx::IntRect bounds = aRegion.GetBounds().ToUnknownRect();
+  gfx::Rect rect(bounds);
+  aDest->DrawSurface(aSurface, rect, rect);
+
+  if (numRects != 1) {
+    aDest->PopClip();
+  }
+}
+
+void WindowImageSurface::Draw(gfx::DrawTarget* aDest,
+                              LayoutDeviceIntRegion& aWaylandBufferDamage) {
+  Draw(mSurface.get(), aDest, mUpdateRegion);
+  aWaylandBufferDamage.OrWith(mUpdateRegion);
+}
+
+WindowImageSurface::WindowImageSurface(
+    gfx::SourceSurface* aSurface, const LayoutDeviceIntRegion& aUpdateRegion)
+    : mSurface(aSurface), mUpdateRegion(aUpdateRegion){};
+
+void WindowSurfaceWayland::DrawDelayedImageCommits(
+    gfx::DrawTarget* aDrawTarget, LayoutDeviceIntRegion& aWaylandBufferDamage) {
+  for (unsigned int i = 0; i < mDelayedImageCommits.Length(); i++) {
+    mDelayedImageCommits[i].Draw(aDrawTarget, aWaylandBufferDamage);
+  }
+  mDelayedImageCommits.Clear();
+}
+
 bool WindowSurfaceWayland::CommitImageSurfaceToWaylandBuffer(
-    const LayoutDeviceIntRegion& aRegion) {
+    const LayoutDeviceIntRegion& aRegion,
+    LayoutDeviceIntRegion& aWaylandBufferDamage) {
   MOZ_ASSERT(!mDrawToWaylandBufferDirectly);
 
   LayoutDeviceIntRect screenRect = mWindow->GetBounds();
   gfx::IntRect bounds = aRegion.GetBounds().ToUnknownRect();
 
   gfx::Rect rect(bounds);
   if (rect.IsEmpty()) {
     return false;
   }
 
-  RefPtr<gfx::DrawTarget> dt = LockWaylandBuffer(
-      screenRect.width, screenRect.height, mWindow->WaylandSurfaceNeedsClear());
   RefPtr<gfx::SourceSurface> surf =
       gfx::Factory::CreateSourceSurfaceForCairoSurface(
           mImageSurface->CairoSurface(), mImageSurface->GetSize(),
           mImageSurface->Format());
-  if (!dt || !surf) {
+  if (!surf) {
     return false;
   }
 
-  uint32_t numRects = aRegion.GetNumRects();
-  if (numRects != 1) {
-    AutoTArray<IntRect, 32> rects;
-    rects.SetCapacity(numRects);
-    for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) {
-      rects.AppendElement(iter.Get().ToUnknownRect());
+  bool needsClear = mWindow->WaylandSurfaceNeedsClear();
+  RefPtr<gfx::DrawTarget> dt = LockWaylandBuffer(
+      screenRect.width, screenRect.height, needsClear,
+      /* fullscreenDrawing */ false, /* aNoBackBufferCopy */ true);
+  if (dt) {
+    if (needsClear) {
+      mWindow->WaylandSurfaceCleared();
     }
-    dt->PushDeviceSpaceClipRects(rects.Elements(), rects.Length());
-  }
-
-  dt->DrawSurface(surf, rect, rect);
-
-  if (numRects != 1) {
-    dt->PopClip();
+    // Draw any delayed image commits first
+    DrawDelayedImageCommits(dt, aWaylandBufferDamage);
+    WindowImageSurface::Draw(surf, dt, aRegion);
+    // Submit all drawing to final Wayland buffer upload
+    aWaylandBufferDamage.OrWith(aRegion);
+    UnlockWaylandBuffer();
+  } else {
+    mDelayedImageCommits.AppendElement(WindowImageSurface(surf, aRegion));
+    return false;
   }
 
   return true;
 }
 
 static void WaylandBufferDelayCommitHandler(WindowSurfaceWayland** aSurface) {
   if (*aSurface) {
     (*aSurface)->DelayedCommitHandler();
@@ -643,16 +810,34 @@ void WindowSurfaceWayland::CalcRectScale
 
 void WindowSurfaceWayland::CommitWaylandBuffer() {
   MOZ_ASSERT(mPendingCommit, "Committing empty surface!");
 
   if (mWaitToFullScreenUpdate) {
     return;
   }
 
+  if (!mDrawToWaylandBufferDirectly) {
+    // There's some cached drawings - try to flush them now.
+    LayoutDeviceIntRect screenRect = mWindow->GetBounds();
+    bool needsClear = mWindow->WaylandSurfaceNeedsClear();
+    RefPtr<gfx::DrawTarget> dt =
+        LockWaylandBuffer(screenRect.width, screenRect.height, needsClear,
+                          /* fullscreenInvalidate */ false,
+                          /* aNoBackBufferCopy */ true);
+    if (dt) {
+      if (needsClear) {
+        mWindow->WaylandSurfaceCleared();
+      }
+      DrawDelayedImageCommits(dt, mWaylandBufferDamage);
+      UnlockWaylandBuffer();
+      mDrawToWaylandBufferDirectly = true;
+    }
+  }
+
   wl_surface* waylandSurface = mWindow->GetWaylandSurface();
   if (!waylandSurface) {
     // Target window is not created yet - delay the commit. This can happen only
     // when the window is newly created and there's no active
     // frame callback pending.
     MOZ_ASSERT(!mFrameCallback || waylandSurface != mLastCommittedSurface,
                "Missing wayland surface at frame callback!");
 
@@ -735,24 +920,31 @@ void WindowSurfaceWayland::Commit(const 
     gfx::IntSize lockSize(bounds.XMost(), bounds.YMost());
 
     LOGWAYLAND(("%s [%p] lockSize [%d x %d] screenSize [%d x %d]\n",
                 __PRETTY_FUNCTION__, (void*)this, lockSize.width,
                 lockSize.height, screenRect.width, lockSize.height));
   }
 #endif
 
-  // We have new content at mImageSurface - copy data to mWaylandBuffer first.
-  if (!mDrawToWaylandBufferDirectly) {
-    CommitImageSurfaceToWaylandBuffer(aInvalidRegion);
-  }
-
-  // If we're not at fullscreen damage add drawing area from aInvalidRegion
-  if (!mWaylandBufferFullScreenDamage) {
-    mWaylandBufferDamage.OrWith(aInvalidRegion);
+  if (mDrawToWaylandBufferDirectly) {
+    MOZ_ASSERT(mWaylandBuffer->IsLocked());
+    // If we're not at fullscreen damage add drawing area from aInvalidRegion
+    if (!mWaylandBufferFullScreenDamage) {
+      mWaylandBufferDamage.OrWith(aInvalidRegion);
+    }
+    UnlockWaylandBuffer();
+  } else {
+    MOZ_ASSERT(!mWaylandBuffer->IsLocked(),
+               "Drawing to already locked buffer?");
+    if (CommitImageSurfaceToWaylandBuffer(aInvalidRegion,
+                                          mWaylandBufferDamage)) {
+      // Our cached drawing is flushed, we can draw fullscreen again.
+      mDrawToWaylandBufferDirectly = true;
+    }
   }
 
   // We're ready to commit.
   mPendingCommit = true;
   CommitWaylandBuffer();
 }
 
 void WindowSurfaceWayland::FrameCallbackHandler() {
diff --git a/widget/gtk/WindowSurfaceWayland.h b/widget/gtk/WindowSurfaceWayland.h
--- a/widget/gtk/WindowSurfaceWayland.h
+++ b/widget/gtk/WindowSurfaceWayland.h
@@ -5,16 +5,19 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #ifndef _MOZILLA_WIDGET_GTK_WINDOW_SURFACE_WAYLAND_H
 #define _MOZILLA_WIDGET_GTK_WINDOW_SURFACE_WAYLAND_H
 
 #include <prthread.h>
 #include "mozilla/gfx/Types.h"
 #include "nsWaylandDisplay.h"
+#ifdef HAVE_LIBDRM
+#  include "mozilla/gfx/WaylandDMABufSurface.h"
+#endif
 
 #define BACK_BUFFER_NUM 2
 
 namespace mozilla {
 namespace widget {
 
 // Allocates and owns shared memory for Wayland drawing surface
 class WaylandShmPool {
@@ -35,94 +38,192 @@ class WaylandShmPool {
   int mShmPoolFd;
   int mAllocatedSize;
   void* mImageData;
 };
 
 // Holds actual graphics data for wl_surface
 class WindowBackBuffer {
  public:
-  WindowBackBuffer(nsWaylandDisplay* aDisplay, int aWidth, int aHeight);
-  ~WindowBackBuffer();
+  virtual already_AddRefed<gfx::DrawTarget> Lock() = 0;
+  virtual void Unlock(){};
+  virtual bool IsLocked() { return false; };
+
+  void Attach(wl_surface* aSurface);
+  virtual void Detach(wl_buffer* aBuffer) = 0;
+  virtual bool IsAttached() = 0;
+
+  virtual void Clear() = 0;
+  virtual bool Resize(int aWidth, int aHeight) = 0;
+
+  virtual int GetWidth() = 0;
+  virtual int GetHeight() = 0;
+  virtual wl_buffer* GetWlBuffer() = 0;
+  virtual void SetAttached() = 0;
+
+  virtual bool SetImageDataFromBuffer(
+      class WindowBackBuffer* aSourceBuffer) = 0;
+
+  bool IsMatchingSize(int aWidth, int aHeight) {
+    return aWidth == GetWidth() && aHeight == GetHeight();
+  }
+  bool IsMatchingSize(class WindowBackBuffer* aBuffer) {
+    return aBuffer->IsMatchingSize(GetWidth(), GetHeight());
+  }
+
+  static gfx::SurfaceFormat GetSurfaceFormat() { return mFormat; }
+
+  nsWaylandDisplay* GetWaylandDisplay() { return mWaylandDisplay; };
+
+  WindowBackBuffer(nsWaylandDisplay* aWaylandDisplay)
+      : mWaylandDisplay(aWaylandDisplay){};
+  virtual ~WindowBackBuffer(){};
+
+ private:
+  static gfx::SurfaceFormat mFormat;
+  nsWaylandDisplay* mWaylandDisplay;
+};
+
+class WindowBackBufferShm : public WindowBackBuffer {
+ public:
+  WindowBackBufferShm(nsWaylandDisplay* aWaylandDisplay, int aWidth,
+                      int aHeight);
+  ~WindowBackBufferShm();
 
   already_AddRefed<gfx::DrawTarget> Lock();
 
-  void Attach(wl_surface* aSurface);
   void Detach(wl_buffer* aBuffer);
   bool IsAttached() { return mAttached; }
 
   void Clear();
   bool Resize(int aWidth, int aHeight);
   bool SetImageDataFromBuffer(class WindowBackBuffer* aSourceBuffer);
 
-  bool IsMatchingSize(int aWidth, int aHeight) {
-    return aWidth == mWidth && aHeight == mHeight;
-  }
-  bool IsMatchingSize(class WindowBackBuffer* aBuffer) {
-    return aBuffer->mWidth == mWidth && aBuffer->mHeight == mHeight;
-  }
+  int GetWidth() { return mWidth; };
+  int GetHeight() { return mHeight; };
 
-  static gfx::SurfaceFormat GetSurfaceFormat() { return mFormat; }
+  wl_buffer* GetWlBuffer() { return mWaylandBuffer; };
+  void SetAttached() { mAttached = true; };
 
  private:
   void Create(int aWidth, int aHeight);
   void Release();
 
   // WaylandShmPool provides actual shared memory we draw into
   WaylandShmPool mShmPool;
 
   // wl_buffer is a wayland object that encapsulates the shared memory
   // and passes it to wayland compositor by wl_surface object.
   wl_buffer* mWaylandBuffer;
   int mWidth;
   int mHeight;
   bool mAttached;
-  nsWaylandDisplay* mWaylandDisplay;
-  static gfx::SurfaceFormat mFormat;
+};
+
+#ifdef HAVE_LIBDRM
+class WindowBackBufferDMABuf : public WindowBackBuffer {
+ public:
+  WindowBackBufferDMABuf(nsWaylandDisplay* aWaylandDisplay, int aWidth,
+                         int aHeight);
+  ~WindowBackBufferDMABuf();
+
+  bool IsAttached();
+  void SetAttached();
+
+  int GetWidth();
+  int GetHeight();
+  wl_buffer* GetWlBuffer();
+
+  bool SetImageDataFromBuffer(class WindowBackBuffer* aSourceBuffer);
+
+  already_AddRefed<gfx::DrawTarget> Lock();
+  bool IsLocked();
+  void Unlock();
+
+  void Clear();
+  void Detach(wl_buffer* aBuffer);
+  bool Resize(int aWidth, int aHeight);
+
+ private:
+  WaylandDMABufSurface mDMAbufSurface;
+};
+#endif
+
+class WindowImageSurface {
+ public:
+  static void Draw(gfx::SourceSurface* aSurface, gfx::DrawTarget* aDest,
+                   const LayoutDeviceIntRegion& aRegion);
+
+  void Draw(gfx::DrawTarget* aDest,
+            LayoutDeviceIntRegion& aWaylandBufferDamage);
+
+  WindowImageSurface(gfx::SourceSurface* aSurface,
+                     const LayoutDeviceIntRegion& aUpdateRegion);
+
+ private:
+  RefPtr<gfx::SourceSurface> mSurface;
+  const LayoutDeviceIntRegion mUpdateRegion;
 };
 
 // WindowSurfaceWayland is an abstraction for wl_surface
 // and related management
 class WindowSurfaceWayland : public WindowSurface {
  public:
   explicit WindowSurfaceWayland(nsWindow* aWindow);
   ~WindowSurfaceWayland();
 
   already_AddRefed<gfx::DrawTarget> Lock(
       const LayoutDeviceIntRegion& aRegion) override;
   void Commit(const LayoutDeviceIntRegion& aInvalidRegion) final;
   void FrameCallbackHandler();
   void DelayedCommitHandler();
 
  private:
-  WindowBackBuffer* GetWaylandBufferToDraw(int aWidth, int aHeight);
+  WindowBackBuffer* CreateWaylandBuffer(int aWidth, int aHeight);
+  WindowBackBuffer* GetWaylandBufferToDraw(int aWidth, int aHeight,
+                                           bool aFullScreenUpdate,
+                                           bool aNoBackBufferCopy);
 
   already_AddRefed<gfx::DrawTarget> LockWaylandBuffer(int aWidth, int aHeight,
-                                                      bool aClearBuffer);
+                                                      bool aClearBuffer,
+                                                      bool aFullScreenUpdate,
+                                                      bool aNoBackBufferCopy);
+  void UnlockWaylandBuffer();
+
   already_AddRefed<gfx::DrawTarget> LockImageSurface(
       const gfx::IntSize& aLockSize);
-  bool CommitImageSurfaceToWaylandBuffer(const LayoutDeviceIntRegion& aRegion);
+  bool CommitImageSurfaceToWaylandBuffer(
+      const LayoutDeviceIntRegion& aRegion,
+      LayoutDeviceIntRegion& aWaylandBufferDamage);
   void CommitWaylandBuffer();
   void CalcRectScale(LayoutDeviceIntRect& aRect, int scale);
 
+  void DrawDelayedImageCommits(gfx::DrawTarget* aDrawTarget,
+                               LayoutDeviceIntRegion& aWaylandBufferDamage);
+
   // TODO: Do we need to hold a reference to nsWindow object?
   nsWindow* mWindow;
   nsWaylandDisplay* mWaylandDisplay;
   WindowBackBuffer* mWaylandBuffer;
   LayoutDeviceIntRegion mWaylandBufferDamage;
   WindowBackBuffer* mBackupBuffer[BACK_BUFFER_NUM];
-  RefPtr<gfxImageSurface> mImageSurface;
   wl_callback* mFrameCallback;
   wl_surface* mLastCommittedSurface;
   MessageLoop* mDisplayThreadMessageLoop;
   WindowSurfaceWayland** mDelayedCommitHandle;
+  RefPtr<gfxImageSurface> mImageSurface;
+  AutoTArray<WindowImageSurface, 30> mDelayedImageCommits;
   bool mDrawToWaylandBufferDirectly;
   bool mPendingCommit;
   bool mWaylandBufferFullScreenDamage;
   bool mIsMainThread;
   bool mNeedScaleFactorUpdate;
   bool mWaitToFullScreenUpdate;
+
+  static bool UseDMABufBackend();
+  static bool mUseDMABufInitialized;
+  static bool mUseDMABuf;
 };
 
 }  // namespace widget
 }  // namespace mozilla
 
 #endif  // _MOZILLA_WIDGET_GTK_WINDOW_SURFACE_WAYLAND_H
diff --git a/widget/gtk/moz.build b/widget/gtk/moz.build
--- a/widget/gtk/moz.build
+++ b/widget/gtk/moz.build
@@ -97,17 +97,18 @@ if CONFIG['MOZ_X11']:
 
 if CONFIG['MOZ_WAYLAND']:
     UNIFIED_SOURCES += [
         'nsClipboardWayland.cpp',
         'nsWaylandDisplay.cpp',
         'WindowSurfaceWayland.cpp',
     ]
     EXPORTS.mozilla.widget += [
-        'nsWaylandDisplayShutdown.h'
+        'nsWaylandDisplay.h',
+        'nsWaylandDisplayShutdown.h',
     ]
 
 if CONFIG['ACCESSIBILITY']:
     UNIFIED_SOURCES += [
         'maiRedundantObjectFactory.c',
     ]
 
 UNIFIED_SOURCES += [
diff --git a/widget/gtk/mozcontainer.cpp b/widget/gtk/mozcontainer.cpp
--- a/widget/gtk/mozcontainer.cpp
+++ b/widget/gtk/mozcontainer.cpp
@@ -641,17 +641,19 @@ struct wl_egl_window* moz_container_get_
   return container->eglwindow;
 }
 
 gboolean moz_container_has_wl_egl_window(MozContainer* container) {
   return container->eglwindow ? true : false;
 }
 
 gboolean moz_container_surface_needs_clear(MozContainer* container) {
-  gboolean state = container->surface_needs_clear;
+  return container->surface_needs_clear;
+}
+
+void moz_container_surface_cleared(MozContainer* container) {
   container->surface_needs_clear = false;
-  return state;
 }
 #endif
 
 void moz_container_force_default_visual(MozContainer* container) {
   container->force_default_visual = true;
 }
diff --git a/widget/gtk/mozcontainer.h b/widget/gtk/mozcontainer.h
--- a/widget/gtk/mozcontainer.h
+++ b/widget/gtk/mozcontainer.h
@@ -96,15 +96,16 @@ void moz_container_put(MozContainer* con
 void moz_container_force_default_visual(MozContainer* container);
 
 #ifdef MOZ_WAYLAND
 struct wl_surface* moz_container_get_wl_surface(MozContainer* container);
 struct wl_egl_window* moz_container_get_wl_egl_window(MozContainer* container);
 
 gboolean moz_container_has_wl_egl_window(MozContainer* container);
 gboolean moz_container_surface_needs_clear(MozContainer* container);
+void moz_container_surface_cleared(MozContainer* container);
 void moz_container_scale_changed(MozContainer* container,
                                  GtkAllocation* aAllocation);
 void moz_container_set_initial_draw_callback(
     MozContainer* container, std::function<void(void)> inital_draw_cb);
 #endif
 
 #endif /* __MOZ_CONTAINER_H__ */
diff --git a/widget/gtk/mozwayland/moz.build b/widget/gtk/mozwayland/moz.build
--- a/widget/gtk/mozwayland/moz.build
+++ b/widget/gtk/mozwayland/moz.build
@@ -2,12 +2,16 @@
 # vim: set filetype=python:
 # 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/.
 
 SOURCES += [
     'mozwayland.c',
 ]
+EXPORTS.mozilla.widget += [
+    'mozwayland.h',
+]
 
 SharedLibrary('mozwayland')
 
 CFLAGS += CONFIG['TK_CFLAGS']
+
diff --git a/widget/gtk/nsWaylandDisplay.cpp b/widget/gtk/nsWaylandDisplay.cpp
--- a/widget/gtk/nsWaylandDisplay.cpp
+++ b/widget/gtk/nsWaylandDisplay.cpp
@@ -2,20 +2,16 @@
 /* vim:expandtab:shiftwidth=4:tabstop=4:
  */
 /* 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 "nsWaylandDisplay.h"
 
-#include "base/message_loop.h"  // for MessageLoop
-#include "base/task.h"          // for NewRunnableMethod, etc
-#include "mozilla/StaticMutex.h"
-
 namespace mozilla {
 namespace widget {
 
 // nsWaylandDisplay needs to be created for each calling thread(main thread,
 // compositor thread and render thread)
 #define MAX_DISPLAY_CONNECTIONS 3
 
 static nsWaylandDisplay* gWaylandDisplays[MAX_DISPLAY_CONNECTIONS];
@@ -107,16 +103,67 @@ void nsWaylandDisplay::SetDataDeviceMana
 
 void nsWaylandDisplay::SetSeat(wl_seat* aSeat) { mSeat = aSeat; }
 
 void nsWaylandDisplay::SetPrimarySelectionDeviceManager(
     gtk_primary_selection_device_manager* aPrimarySelectionDeviceManager) {
   mPrimarySelectionDeviceManager = aPrimarySelectionDeviceManager;
 }
 
+#ifdef HAVE_LIBDRM
+void nsWaylandDisplay::SetDmabuf(zwp_linux_dmabuf_v1* aDmabuf) {
+  mDmabuf = aDmabuf;
+}
+
+GbmFormat* nsWaylandDisplay::GetGbmFormat(bool aHasAlpha) {
+  GbmFormat* format = aHasAlpha ? &mARGBFormat : &mXRGBFormat;
+  return format->mIsSupported ? format : nullptr;
+}
+
+void nsWaylandDisplay::AddFormatModifier(bool aHasAlpha, int aFormat,
+                                         uint32_t mModifierHi,
+                                         uint32_t mModifierLo) {
+  GbmFormat* format = aHasAlpha ? &mARGBFormat : &mXRGBFormat;
+  format->mIsSupported = true;
+  format->mHasAlpha = aHasAlpha;
+  format->mFormat = aFormat;
+  format->mModifiersCount++;
+  format->mModifiers =
+      (uint64_t*)realloc(format->mModifiers,
+                         format->mModifiersCount * sizeof(*format->mModifiers));
+  format->mModifiers[format->mModifiersCount - 1] =
+      ((uint64_t)mModifierHi << 32) | mModifierLo;
+}
+
+static void dmabuf_modifiers(void* data,
+                             struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf,
+                             uint32_t format, uint32_t modifier_hi,
+                             uint32_t modifier_lo) {
+  auto display = reinterpret_cast<nsWaylandDisplay*>(data);
+  switch (format) {
+    case DRM_FORMAT_ARGB8888:
+      display->AddFormatModifier(true, format, modifier_hi, modifier_lo);
+      break;
+    case DRM_FORMAT_XRGB8888:
+      display->AddFormatModifier(false, format, modifier_hi, modifier_lo);
+      break;
+    default:
+      break;
+  }
+}
+
+static void dmabuf_format(void* data,
+                          struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf,
+                          uint32_t format) {
+  // XXX: deprecated
+}
+
+static const struct zwp_linux_dmabuf_v1_listener dmabuf_listener = {
+    dmabuf_format, dmabuf_modifiers};
+
 static void global_registry_handler(void* data, wl_registry* registry,
                                     uint32_t id, const char* interface,
                                     uint32_t version) {
   auto display = reinterpret_cast<nsWaylandDisplay*>(data);
   if (!display) return;
 
   if (strcmp(interface, "wl_shm") == 0) {
     auto shm = static_cast<wl_shm*>(
@@ -144,16 +191,21 @@ static void global_registry_handler(void
                        display->GetEventQueue());
     display->SetPrimarySelectionDeviceManager(primary_selection_device_manager);
   } else if (strcmp(interface, "wl_subcompositor") == 0) {
     auto subcompositor = static_cast<wl_subcompositor*>(
         wl_registry_bind(registry, id, &wl_subcompositor_interface, 1));
     wl_proxy_set_queue((struct wl_proxy*)subcompositor,
                        display->GetEventQueue());
     display->SetSubcompositor(subcompositor);
+  } else if (strcmp(interface, "zwp_linux_dmabuf_v1") == 0 && version > 2) {
+    auto dmabuf = static_cast<zwp_linux_dmabuf_v1*>(
+        wl_registry_bind(registry, id, &zwp_linux_dmabuf_v1_interface, 3));
+    display->SetDmabuf(dmabuf);
+    zwp_linux_dmabuf_v1_add_listener(dmabuf, &dmabuf_listener, data);
   }
 }
 
 static void global_registry_remover(void* data, wl_registry* registry,
                                     uint32_t id) {}
 
 static const struct wl_registry_listener registry_listener = {
     global_registry_handler, global_registry_remover};
@@ -162,27 +214,85 @@ bool nsWaylandDisplay::DispatchEventQueu
   wl_display_dispatch_queue_pending(mDisplay, mEventQueue);
   return true;
 }
 
 bool nsWaylandDisplay::Matches(wl_display* aDisplay) {
   return mThreadId == PR_GetCurrentThread() && aDisplay == mDisplay;
 }
 
+bool nsWaylandDisplay::ConfigureGbm() {
+  if (!nsGbmLib::IsAvailable()) {
+    return false;
+  }
+
+  // TODO
+  const char* drm_render_node = getenv("MOZ_WAYLAND_DRM_DEVICE");
+  if (!drm_render_node) {
+    drm_render_node = "/dev/dri/renderD128";
+  }
+
+  mGbmFd = open(drm_render_node, O_RDWR);
+  if (mGbmFd < 0) {
+    NS_WARNING(
+        nsPrintfCString("Failed to open drm render node %s\n", drm_render_node)
+            .get());
+    return false;
+  }
+
+  mGbmDevice = nsGbmLib::CreateDevice(mGbmFd);
+  if (mGbmDevice == nullptr) {
+    NS_WARNING(nsPrintfCString("Failed to create drm render device %s\n",
+                               drm_render_node)
+                   .get());
+    close(mGbmFd);
+    return false;
+  }
+
+  return true;
+}
+
+gbm_device* nsWaylandDisplay::GetGbmDevice() {
+  if (!mGdmConfigured) {
+    ConfigureGbm();
+    mGdmConfigured = true;
+  }
+  return mGbmDevice;
+}
+
+int nsWaylandDisplay::GetGbmDeviceFd() {
+  if (!mGdmConfigured) {
+    ConfigureGbm();
+    mGdmConfigured = true;
+  }
+  return mGbmFd;
+}
+#endif
+
 nsWaylandDisplay::nsWaylandDisplay(wl_display* aDisplay)
     : mDispatcherThreadLoop(nullptr),
       mThreadId(PR_GetCurrentThread()),
       mDisplay(aDisplay),
       mEventQueue(nullptr),
       mDataDeviceManager(nullptr),
       mSubcompositor(nullptr),
       mSeat(nullptr),
       mShm(nullptr),
       mPrimarySelectionDeviceManager(nullptr),
-      mRegistry(nullptr) {
+      mRegistry(nullptr)
+#ifdef HAVE_LIBDRM
+      ,
+      mGbmDevice(nullptr),
+      mGbmFd(-1),
+      mGdmConfigured(false),
+      mExplicitSync(false),
+      mXRGBFormat({false, false, -1, nullptr, 0}),
+      mARGBFormat({false, false, -1, nullptr, 0})
+#endif
+{
   mRegistry = wl_display_get_registry(mDisplay);
   wl_registry_add_listener(mRegistry, &registry_listener, this);
 
   if (NS_IsMainThread()) {
     // Use default event queue in main thread operated by Gtk+.
     mEventQueue = nullptr;
     wl_display_roundtrip(mDisplay);
     wl_display_roundtrip(mDisplay);
@@ -205,10 +315,84 @@ nsWaylandDisplay::~nsWaylandDisplay() {
   mRegistry = nullptr;
 
   if (mEventQueue) {
     wl_event_queue_destroy(mEventQueue);
     mEventQueue = nullptr;
   }
 }
 
+#ifdef HAVE_LIBDRM
+void* nsGbmLib::sGbmLibHandle = nullptr;
+void* nsGbmLib::sXf86DrmLibHandle = nullptr;
+bool nsGbmLib::sLibLoaded = false;
+CreateDeviceFunc nsGbmLib::sCreateDevice;
+CreateFunc nsGbmLib::sCreate;
+CreateWithModifiersFunc nsGbmLib::sCreateWithModifiers;
+GetModifierFunc nsGbmLib::sGetModifier;
+GetStrideFunc nsGbmLib::sGetStride;
+GetFdFunc nsGbmLib::sGetFd;
+DestroyFunc nsGbmLib::sDestroy;
+MapFunc nsGbmLib::sMap;
+UnmapFunc nsGbmLib::sUnmap;
+GetPlaneCountFunc nsGbmLib::sGetPlaneCount;
+GetHandleForPlaneFunc nsGbmLib::sGetHandleForPlane;
+GetStrideForPlaneFunc nsGbmLib::sGetStrideForPlane;
+GetOffsetFunc nsGbmLib::sGetOffset;
+DrmPrimeHandleToFDFunc nsGbmLib::sDrmPrimeHandleToFD;
+
+bool nsGbmLib::IsAvailable() {
+  if (!Load()) {
+    return false;
+  }
+  return sCreateDevice != nullptr && sCreate != nullptr &&
+         sCreateWithModifiers != nullptr && sGetModifier != nullptr &&
+         sGetStride != nullptr && sGetFd != nullptr && sDestroy != nullptr &&
+         sMap != nullptr && sUnmap != nullptr;
+}
+
+bool nsGbmLib::IsModifierAvailable() {
+  if (!Load()) {
+    return false;
+  }
+  return sDrmPrimeHandleToFD != nullptr;
+}
+
+bool nsGbmLib::Load() {
+  if (!sGbmLibHandle && !sLibLoaded) {
+    sLibLoaded = true;
+
+    sGbmLibHandle = dlopen("libgbm.so", RTLD_LAZY | RTLD_LOCAL);
+    if (!sGbmLibHandle) {
+      return false;
+    }
+
+    sCreateDevice = (CreateDeviceFunc)dlsym(sGbmLibHandle, "gbm_create_device");
+    sCreate = (CreateFunc)dlsym(sGbmLibHandle, "gbm_bo_create");
+    sCreateWithModifiers = (CreateWithModifiersFunc)dlsym(
+        sGbmLibHandle, "gbm_bo_create_with_modifiers");
+    sGetModifier = (GetModifierFunc)dlsym(sGbmLibHandle, "gbm_bo_get_modifier");
+    sGetStride = (GetStrideFunc)dlsym(sGbmLibHandle, "gbm_bo_get_stride");
+    sGetFd = (GetFdFunc)dlsym(sGbmLibHandle, "gbm_bo_get_fd");
+    sDestroy = (DestroyFunc)dlsym(sGbmLibHandle, "gbm_bo_destroy");
+    sMap = (MapFunc)dlsym(sGbmLibHandle, "gbm_bo_map");
+    sUnmap = (UnmapFunc)dlsym(sGbmLibHandle, "gbm_bo_unmap");
+    sGetPlaneCount =
+        (GetPlaneCountFunc)dlsym(sGbmLibHandle, "gbm_bo_get_plane_count");
+    sGetHandleForPlane = (GetHandleForPlaneFunc)dlsym(
+        sGbmLibHandle, "gbm_bo_get_handle_for_plane");
+    sGetStrideForPlane = (GetStrideForPlaneFunc)dlsym(
+        sGbmLibHandle, "gbm_bo_get_stride_for_plane");
+    sGetOffset = (GetOffsetFunc)dlsym(sGbmLibHandle, "gbm_bo_get_offset");
+
+    sXf86DrmLibHandle = dlopen("libdrm.so", RTLD_LAZY | RTLD_LOCAL);
+    if (sXf86DrmLibHandle) {
+      sDrmPrimeHandleToFD = (DrmPrimeHandleToFDFunc)dlsym(sXf86DrmLibHandle,
+                                                          "drmPrimeHandleToFD");
+    }
+  }
+
+  return sGbmLibHandle;
+}
+#endif
+
 }  // namespace widget
 }  // namespace mozilla
diff --git a/widget/gtk/nsWaylandDisplay.h b/widget/gtk/nsWaylandDisplay.h
--- a/widget/gtk/nsWaylandDisplay.h
+++ b/widget/gtk/nsWaylandDisplay.h
@@ -1,24 +1,43 @@
 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim:expandtab:shiftwidth=4:tabstop=4:
  */
 /* 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/. */
 
-#ifndef __MOZ_WAYLAND_REGISTRY_H__
-#define __MOZ_WAYLAND_REGISTRY_H__
+#ifndef __MOZ_WAYLAND_DISPLAY_H__
+#define __MOZ_WAYLAND_DISPLAY_H__
+
+#include "mozilla/widget/mozwayland.h"
+#include "mozilla/widget/gtk-primary-selection-client-protocol.h"
 
-#include "mozwayland/mozwayland.h"
-#include "wayland/gtk-primary-selection-client-protocol.h"
+#include "base/message_loop.h"  // for MessageLoop
+#include "base/task.h"          // for NewRunnableMethod, etc
+#include "mozilla/StaticMutex.h"
+
+#ifdef HAVE_LIBDRM
+#  include <drm/drm_fourcc.h>
+#  include <xf86drm.h>
+#  include <gbm.h>
+#  include "mozilla/widget/linux-dmabuf-unstable-v1-client-protocol.h"
+#endif
 
 namespace mozilla {
 namespace widget {
 
+struct GbmFormat {
+  bool mIsSupported;
+  bool mHasAlpha;
+  int mFormat;
+  uint64_t* mModifiers;
+  int mModifiersCount;
+};
+
 // Our general connection to Wayland display server,
 // holds our display connection and runs event loop.
 class nsWaylandDisplay {
  public:
   explicit nsWaylandDisplay(wl_display* aDisplay);
   virtual ~nsWaylandDisplay();
 
   bool DispatchEventQueue();
@@ -41,28 +60,143 @@ class nsWaylandDisplay {
   void SetSubcompositor(wl_subcompositor* aSubcompositor);
   void SetDataDeviceManager(wl_data_device_manager* aDataDeviceManager);
   void SetSeat(wl_seat* aSeat);
   void SetPrimarySelectionDeviceManager(
       gtk_primary_selection_device_manager* aPrimarySelectionDeviceManager);
 
   void Shutdown();
 
+#ifdef HAVE_LIBDRM
+  void SetDmabuf(zwp_linux_dmabuf_v1* aDmabuf);
+  zwp_linux_dmabuf_v1* GetDmabuf() { return mDmabuf; };
+  gbm_device* GetGbmDevice();
+  int GetGbmDeviceFd();
+  bool IsExplicitSyncEnabled() { return mExplicitSync; }
+  GbmFormat* GetGbmFormat(bool aHasAlpha);
+  void AddFormatModifier(bool aHasAlpha, int aFormat, uint32_t mModifierHi,
+                         uint32_t mModifierLo);
+#endif
+
  private:
+#ifdef HAVE_LIBDRM
+  bool ConfigureGbm();
+#endif
+
   MessageLoop* mDispatcherThreadLoop;
   PRThread* mThreadId;
   wl_display* mDisplay;
   wl_event_queue* mEventQueue;
   wl_data_device_manager* mDataDeviceManager;
   wl_subcompositor* mSubcompositor;
   wl_seat* mSeat;
   wl_shm* mShm;
   gtk_primary_selection_device_manager* mPrimarySelectionDeviceManager;
   wl_registry* mRegistry;
+#ifdef HAVE_LIBDRM
+  zwp_linux_dmabuf_v1* mDmabuf;
+  gbm_device* mGbmDevice;
+  int mGbmFd;
+  bool mGdmConfigured;
+  bool mExplicitSync;
+  GbmFormat mXRGBFormat;
+  GbmFormat mARGBFormat;
+#endif
 };
 
 void WaylandDispatchDisplays();
 nsWaylandDisplay* WaylandDisplayGet(GdkDisplay* aGdkDisplay = nullptr);
 
+#ifdef HAVE_LIBDRM
+typedef struct gbm_device* (*CreateDeviceFunc)(int);
+typedef struct gbm_bo* (*CreateFunc)(struct gbm_device*, uint32_t, uint32_t,
+                                     uint32_t, uint32_t);
+typedef struct gbm_bo* (*CreateFunc)(struct gbm_device*, uint32_t, uint32_t,
+                                     uint32_t, uint32_t);
+typedef struct gbm_bo* (*CreateWithModifiersFunc)(struct gbm_device*, uint32_t,
+                                                  uint32_t, uint32_t,
+                                                  const uint64_t*,
+                                                  const unsigned int);
+typedef uint64_t (*GetModifierFunc)(struct gbm_bo*);
+typedef uint32_t (*GetStrideFunc)(struct gbm_bo*);
+typedef int (*GetFdFunc)(struct gbm_bo*);
+typedef void (*DestroyFunc)(struct gbm_bo*);
+typedef void* (*MapFunc)(struct gbm_bo*, uint32_t, uint32_t, uint32_t, uint32_t,
+                         uint32_t, uint32_t*, void**);
+typedef void (*UnmapFunc)(struct gbm_bo*, void*);
+typedef int (*GetPlaneCountFunc)(struct gbm_bo*);
+typedef union gbm_bo_handle (*GetHandleForPlaneFunc)(struct gbm_bo*, int);
+typedef uint32_t (*GetStrideForPlaneFunc)(struct gbm_bo*, int);
+typedef uint32_t (*GetOffsetFunc)(struct gbm_bo*, int);
+
+typedef int (*DrmPrimeHandleToFDFunc)(int, uint32_t, uint32_t, int*);
+
+class nsGbmLib {
+ public:
+  static bool Load();
+  static bool IsAvailable();
+  static bool IsModifierAvailable();
+
+  static struct gbm_device* CreateDevice(int fd) { return sCreateDevice(fd); };
+  static struct gbm_bo* Create(struct gbm_device* gbm, uint32_t width,
+                               uint32_t height, uint32_t format,
+                               uint32_t flags) {
+    return sCreate(gbm, width, height, format, flags);
+  }
+  static void Destroy(struct gbm_bo* bo) { sDestroy(bo); }
+  static uint32_t GetStride(struct gbm_bo* bo) { return sGetStride(bo); }
+  static int GetFd(struct gbm_bo* bo) { return sGetFd(bo); }
+  static void* Map(struct gbm_bo* bo, uint32_t x, uint32_t y, uint32_t width,
+                   uint32_t height, uint32_t flags, uint32_t* stride,
+                   void** map_data) {
+    return sMap(bo, x, y, width, height, flags, stride, map_data);
+  }
+  static void Unmap(struct gbm_bo* bo, void* map_data) { sUnmap(bo, map_data); }
+  static struct gbm_bo* CreateWithModifiers(struct gbm_device* gbm,
+                                            uint32_t width, uint32_t height,
+                                            uint32_t format,
+                                            const uint64_t* modifiers,
+                                            const unsigned int count) {
+    return sCreateWithModifiers(gbm, width, height, format, modifiers, count);
+  }
+  static uint64_t GetModifier(struct gbm_bo* bo) { return sGetModifier(bo); }
+  static int GetPlaneCount(struct gbm_bo* bo) { return sGetPlaneCount(bo); }
+  static union gbm_bo_handle GetHandleForPlane(struct gbm_bo* bo, int plane) {
+    return sGetHandleForPlane(bo, plane);
+  }
+  static uint32_t GetStrideForPlane(struct gbm_bo* bo, int plane) {
+    return sGetStrideForPlane(bo, plane);
+  }
+  static uint32_t GetOffset(struct gbm_bo* bo, int plane) {
+    return sGetOffset(bo, plane);
+  }
+
+  static int DrmPrimeHandleToFD(int fd, uint32_t handle, uint32_t flags,
+                                int* prime_fd) {
+    return sDrmPrimeHandleToFD(fd, handle, flags, prime_fd);
+  }
+
+ private:
+  static CreateDeviceFunc sCreateDevice;
+  static CreateFunc sCreate;
+  static CreateWithModifiersFunc sCreateWithModifiers;
+  static GetModifierFunc sGetModifier;
+  static GetStrideFunc sGetStride;
+  static GetFdFunc sGetFd;
+  static DestroyFunc sDestroy;
+  static MapFunc sMap;
+  static UnmapFunc sUnmap;
+  static GetPlaneCountFunc sGetPlaneCount;
+  static GetHandleForPlaneFunc sGetHandleForPlane;
+  static GetStrideForPlaneFunc sGetStrideForPlane;
+  static GetOffsetFunc sGetOffset;
+  static DrmPrimeHandleToFDFunc sDrmPrimeHandleToFD;
+
+  static void* sGbmLibHandle;
+  static void* sXf86DrmLibHandle;
+  static bool sLibLoaded;
+};
+#endif
+
 }  // namespace widget
 }  // namespace mozilla
 
-#endif  // __MOZ_WAYLAND_REGISTRY_H__
+#endif  // __MOZ_WAYLAND_DISPLAY_H__
diff --git a/widget/gtk/nsWindow.cpp b/widget/gtk/nsWindow.cpp
--- a/widget/gtk/nsWindow.cpp
+++ b/widget/gtk/nsWindow.cpp
@@ -4237,17 +4237,18 @@ LayoutDeviceIntSize nsWindow::GetSafeWin
   // reads it as CARD16.  Sizes of pixmaps, used for drawing, are (unsigned)
   // CARD16 in the protocol, but the server's ProcCreatePixmap returns
   // BadAlloc if dimensions cannot be represented by signed shorts.
   // Because we are creating Cairo surfaces to represent window buffers,
   // we also must ensure that the window can fit in a Cairo surface.
   LayoutDeviceIntSize result = aSize;
   int32_t maxSize = 32767;
   if (mLayerManager && mLayerManager->AsKnowsCompositor()) {
-    maxSize = std::min(maxSize, mLayerManager->AsKnowsCompositor()->GetMaxTextureSize());
+    maxSize = std::min(maxSize,
+                       mLayerManager->AsKnowsCompositor()->GetMaxTextureSize());
   }
   if (result.width > maxSize) {
     result.width = maxSize;
   }
   if (result.height > maxSize) {
     result.height = maxSize;
   }
   return result;
@@ -6827,21 +6828,24 @@ wl_surface* nsWindow::GetWaylandSurface(
       "drawing!");
   return nullptr;
 }
 
 bool nsWindow::WaylandSurfaceNeedsClear() {
   if (mContainer) {
     return moz_container_surface_needs_clear(MOZ_CONTAINER(mContainer));
   }
-
-  NS_WARNING(
-      "nsWindow::WaylandSurfaceNeedsClear(): We don't have any mContainer!");
   return false;
 }
+
+void nsWindow::WaylandSurfaceCleared() {
+  if (mContainer) {
+    return moz_container_surface_cleared(MOZ_CONTAINER(mContainer));
+  }
+}
 #endif
 
 #ifdef MOZ_X11
 /* XApp progress support currently works by setting a property
  * on a window with this Atom name.  A supporting window manager
  * will notice this and pass it along to whatever handling has
  * been implemented on that end (e.g. passing it on to a taskbar
  * widget.)  There is no issue if WM support is lacking, this is
diff --git a/widget/gtk/nsWindow.h b/widget/gtk/nsWindow.h
--- a/widget/gtk/nsWindow.h
+++ b/widget/gtk/nsWindow.h
@@ -341,16 +341,17 @@ class nsWindow final : public nsBaseWidg
 
 #ifdef MOZ_X11
   Display* XDisplay() { return mXDisplay; }
 #endif
 #ifdef MOZ_WAYLAND
   wl_display* GetWaylandDisplay();
   wl_surface* GetWaylandSurface();
   bool WaylandSurfaceNeedsClear();
+  void WaylandSurfaceCleared();
 #endif
   virtual void GetCompositorWidgetInitData(
       mozilla::widget::CompositorWidgetInitData* aInitData) override;
 
   virtual nsresult SetNonClientMargins(
       LayoutDeviceIntMargin& aMargins) override;
   void SetDrawsInTitlebar(bool aState) override;
   virtual void UpdateWindowDraggingRegion(
diff --git a/widget/gtk/wayland/linux-dmabuf-unstable-v1-client-protocol.h b/widget/gtk/wayland/linux-dmabuf-unstable-v1-client-protocol.h
new file mode 100644
--- /dev/null
+++ b/widget/gtk/wayland/linux-dmabuf-unstable-v1-client-protocol.h
@@ -0,0 +1,650 @@
+/* Generated by wayland-scanner 1.17.0 */
+
+#ifndef LINUX_DMABUF_UNSTABLE_V1_CLIENT_PROTOCOL_H
+#define LINUX_DMABUF_UNSTABLE_V1_CLIENT_PROTOCOL_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include "wayland-client.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @page page_linux_dmabuf_unstable_v1 The linux_dmabuf_unstable_v1 protocol
+ * @section page_ifaces_linux_dmabuf_unstable_v1 Interfaces
+ * - @subpage page_iface_zwp_linux_dmabuf_v1 - factory for creating dmabuf-based
+ * wl_buffers
+ * - @subpage page_iface_zwp_linux_buffer_params_v1 - parameters for creating a
+ * dmabuf-based wl_buffer
+ * @section page_copyright_linux_dmabuf_unstable_v1 Copyright
+ * <pre>
+ *
+ * Copyright © 2014, 2015 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ * </pre>
+ */
+struct wl_buffer;
+struct zwp_linux_buffer_params_v1;
+struct zwp_linux_dmabuf_v1;
+
+/**
+ * @page page_iface_zwp_linux_dmabuf_v1 zwp_linux_dmabuf_v1
+ * @section page_iface_zwp_linux_dmabuf_v1_desc Description
+ *
+ * Following the interfaces from:
+ * https://www.khronos.org/registry/egl/extensions/EXT/EGL_EXT_image_dma_buf_import.txt
+ * and the Linux DRM sub-system's AddFb2 ioctl.
+ *
+ * This interface offers ways to create generic dmabuf-based
+ * wl_buffers. Immediately after a client binds to this interface,
+ * the set of supported formats and format modifiers is sent with
+ * 'format' and 'modifier' events.
+ *
+ * The following are required from clients:
+ *
+ * - Clients must ensure that either all data in the dma-buf is
+ * coherent for all subsequent read access or that coherency is
+ * correctly handled by the underlying kernel-side dma-buf
+ * implementation.
+ *
+ * - Don't make any more attachments after sending the buffer to the
+ * compositor. Making more attachments later increases the risk of
+ * the compositor not being able to use (re-import) an existing
+ * dmabuf-based wl_buffer.
+ *
+ * The underlying graphics stack must ensure the following:
+ *
+ * - The dmabuf file descriptors relayed to the server will stay valid
+ * for the whole lifetime of the wl_buffer. This means the server may
+ * at any time use those fds to import the dmabuf into any kernel
+ * sub-system that might accept it.
+ *
+ * To create a wl_buffer from one or more dmabufs, a client creates a
+ * zwp_linux_dmabuf_params_v1 object with a zwp_linux_dmabuf_v1.create_params
+ * request. All planes required by the intended format are added with
+ * the 'add' request. Finally, a 'create' or 'create_immed' request is
+ * issued, which has the following outcome depending on the import success.
+ *
+ * The 'create' request,
+ * - on success, triggers a 'created' event which provides the final
+ * wl_buffer to the client.
+ * - on failure, triggers a 'failed' event to convey that the server
+ * cannot use the dmabufs received from the client.
+ *
+ * For the 'create_immed' request,
+ * - on success, the server immediately imports the added dmabufs to
+ * create a wl_buffer. No event is sent from the server in this case.
+ * - on failure, the server can choose to either:
+ * - terminate the client by raising a fatal error.
+ * - mark the wl_buffer as failed, and send a 'failed' event to the
+ * client. If the client uses a failed wl_buffer as an argument to any
+ * request, the behaviour is compositor implementation-defined.
+ *
+ * Warning! The protocol described in this file is experimental and
+ * backward incompatible changes may be made. Backward compatible changes
+ * may be added together with the corresponding interface version bump.
+ * Backward incompatible changes are done by bumping the version number in
+ * the protocol and interface names and resetting the interface version.
+ * Once the protocol is to be declared stable, the 'z' prefix and the
+ * version number in the protocol and interface names are removed and the
+ * interface version number is reset.
+ * @section page_iface_zwp_linux_dmabuf_v1_api API
+ * See @ref iface_zwp_linux_dmabuf_v1.
+ */
+/**
+ * @defgroup iface_zwp_linux_dmabuf_v1 The zwp_linux_dmabuf_v1 interface
+ *
+ * Following the interfaces from:
+ * https://www.khronos.org/registry/egl/extensions/EXT/EGL_EXT_image_dma_buf_import.txt
+ * and the Linux DRM sub-system's AddFb2 ioctl.
+ *
+ * This interface offers ways to create generic dmabuf-based
+ * wl_buffers. Immediately after a client binds to this interface,
+ * the set of supported formats and format modifiers is sent with
+ * 'format' and 'modifier' events.
+ *
+ * The following are required from clients:
+ *
+ * - Clients must ensure that either all data in the dma-buf is
+ * coherent for all subsequent read access or that coherency is
+ * correctly handled by the underlying kernel-side dma-buf
+ * implementation.
+ *
+ * - Don't make any more attachments after sending the buffer to the
+ * compositor. Making more attachments later increases the risk of
+ * the compositor not being able to use (re-import) an existing
+ * dmabuf-based wl_buffer.
+ *
+ * The underlying graphics stack must ensure the following:
+ *
+ * - The dmabuf file descriptors relayed to the server will stay valid
+ * for the whole lifetime of the wl_buffer. This means the server may
+ * at any time use those fds to import the dmabuf into any kernel
+ * sub-system that might accept it.
+ *
+ * To create a wl_buffer from one or more dmabufs, a client creates a
+ * zwp_linux_dmabuf_params_v1 object with a zwp_linux_dmabuf_v1.create_params
+ * request. All planes required by the intended format are added with
+ * the 'add' request. Finally, a 'create' or 'create_immed' request is
+ * issued, which has the following outcome depending on the import success.
+ *
+ * The 'create' request,
+ * - on success, triggers a 'created' event which provides the final
+ * wl_buffer to the client.
+ * - on failure, triggers a 'failed' event to convey that the server
+ * cannot use the dmabufs received from the client.
+ *
+ * For the 'create_immed' request,
+ * - on success, the server immediately imports the added dmabufs to
+ * create a wl_buffer. No event is sent from the server in this case.
+ * - on failure, the server can choose to either:
+ * - terminate the client by raising a fatal error.
+ * - mark the wl_buffer as failed, and send a 'failed' event to the
+ * client. If the client uses a failed wl_buffer as an argument to any
+ * request, the behaviour is compositor implementation-defined.
+ *
+ * Warning! The protocol described in this file is experimental and
+ * backward incompatible changes may be made. Backward compatible changes
+ * may be added together with the corresponding interface version bump.
+ * Backward incompatible changes are done by bumping the version number in
+ * the protocol and interface names and resetting the interface version.
+ * Once the protocol is to be declared stable, the 'z' prefix and the
+ * version number in the protocol and interface names are removed and the
+ * interface version number is reset.
+ */
+extern const struct wl_interface zwp_linux_dmabuf_v1_interface;
+/**
+ * @page page_iface_zwp_linux_buffer_params_v1 zwp_linux_buffer_params_v1
+ * @section page_iface_zwp_linux_buffer_params_v1_desc Description
+ *
+ * This temporary object is a collection of dmabufs and other
+ * parameters that together form a single logical buffer. The temporary
+ * object may eventually create one wl_buffer unless cancelled by
+ * destroying it before requesting 'create'.
+ *
+ * Single-planar formats only require one dmabuf, however
+ * multi-planar formats may require more than one dmabuf. For all
+ * formats, an 'add' request must be called once per plane (even if the
+ * underlying dmabuf fd is identical).
+ *
+ * You must use consecutive plane indices ('plane_idx' argument for 'add')
+ * from zero to the number of planes used by the drm_fourcc format code.
+ * All planes required by the format must be given exactly once, but can
+ * be given in any order. Each plane index can be set only once.
+ * @section page_iface_zwp_linux_buffer_params_v1_api API
+ * See @ref iface_zwp_linux_buffer_params_v1.
+ */
+/**
+ * @defgroup iface_zwp_linux_buffer_params_v1 The zwp_linux_buffer_params_v1
+ * interface
+ *
+ * This temporary object is a collection of dmabufs and other
+ * parameters that together form a single logical buffer. The temporary
+ * object may eventually create one wl_buffer unless cancelled by
+ * destroying it before requesting 'create'.
+ *
+ * Single-planar formats only require one dmabuf, however
+ * multi-planar formats may require more than one dmabuf. For all
+ * formats, an 'add' request must be called once per plane (even if the
+ * underlying dmabuf fd is identical).
+ *
+ * You must use consecutive plane indices ('plane_idx' argument for 'add')
+ * from zero to the number of planes used by the drm_fourcc format code.
+ * All planes required by the format must be given exactly once, but can
+ * be given in any order. Each plane index can be set only once.
+ */
+extern const struct wl_interface zwp_linux_buffer_params_v1_interface;
+
+/**
+ * @ingroup iface_zwp_linux_dmabuf_v1
+ * @struct zwp_linux_dmabuf_v1_listener
+ */
+struct zwp_linux_dmabuf_v1_listener {
+  /**
+   * supported buffer format
+   *
+   * This event advertises one buffer format that the server
+   * supports. All the supported formats are advertised once when the
+   * client binds to this interface. A roundtrip after binding
+   * guarantees that the client has received all supported formats.
+   *
+   * For the definition of the format codes, see the
+   * zwp_linux_buffer_params_v1::create request.
+   *
+   * Warning: the 'format' event is likely to be deprecated and
+   * replaced with the 'modifier' event introduced in
+   * zwp_linux_dmabuf_v1 version 3, described below. Please refrain
+   * from using the information received from this event.
+   * @param format DRM_FORMAT code
+   */
+  void (*format)(void* data, struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf_v1,
+                 uint32_t format);
+  /**
+   * supported buffer format modifier
+   *
+   * This event advertises the formats that the server supports,
+   * along with the modifiers supported for each format. All the
+   * supported modifiers for all the supported formats are advertised
+   * once when the client binds to this interface. A roundtrip after
+   * binding guarantees that the client has received all supported
+   * format-modifier pairs.
+   *
+   * For the definition of the format and modifier codes, see the
+   * zwp_linux_buffer_params_v1::create request.
+   * @param format DRM_FORMAT code
+   * @param modifier_hi high 32 bits of layout modifier
+   * @param modifier_lo low 32 bits of layout modifier
+   * @since 3
+   */
+  void (*modifier)(void* data, struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf_v1,
+                   uint32_t format, uint32_t modifier_hi, uint32_t modifier_lo);
+};
+
+/**
+ * @ingroup iface_zwp_linux_dmabuf_v1
+ */
+static inline int zwp_linux_dmabuf_v1_add_listener(
+    struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf_v1,
+    const struct zwp_linux_dmabuf_v1_listener* listener, void* data) {
+  return wl_proxy_add_listener((struct wl_proxy*)zwp_linux_dmabuf_v1,
+                               (void (**)(void))listener, data);
+}
+
+#define ZWP_LINUX_DMABUF_V1_DESTROY 0
+#define ZWP_LINUX_DMABUF_V1_CREATE_PARAMS 1
+
+/**
+ * @ingroup iface_zwp_linux_dmabuf_v1
+ */
+#define ZWP_LINUX_DMABUF_V1_FORMAT_SINCE_VERSION 1
+/**
+ * @ingroup iface_zwp_linux_dmabuf_v1
+ */
+#define ZWP_LINUX_DMABUF_V1_MODIFIER_SINCE_VERSION 3
+
+/**
+ * @ingroup iface_zwp_linux_dmabuf_v1
+ */
+#define ZWP_LINUX_DMABUF_V1_DESTROY_SINCE_VERSION 1
+/**
+ * @ingroup iface_zwp_linux_dmabuf_v1
+ */
+#define ZWP_LINUX_DMABUF_V1_CREATE_PARAMS_SINCE_VERSION 1
+
+/** @ingroup iface_zwp_linux_dmabuf_v1 */
+static inline void zwp_linux_dmabuf_v1_set_user_data(
+    struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf_v1, void* user_data) {
+  wl_proxy_set_user_data((struct wl_proxy*)zwp_linux_dmabuf_v1, user_data);
+}
+
+/** @ingroup iface_zwp_linux_dmabuf_v1 */
+static inline void* zwp_linux_dmabuf_v1_get_user_data(
+    struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf_v1) {
+  return wl_proxy_get_user_data((struct wl_proxy*)zwp_linux_dmabuf_v1);
+}
+
+static inline uint32_t zwp_linux_dmabuf_v1_get_version(
+    struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf_v1) {
+  return wl_proxy_get_version((struct wl_proxy*)zwp_linux_dmabuf_v1);
+}
+
+/**
+ * @ingroup iface_zwp_linux_dmabuf_v1
+ *
+ * Objects created through this interface, especially wl_buffers, will
+ * remain valid.
+ */
+static inline void zwp_linux_dmabuf_v1_destroy(
+    struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf_v1) {
+  wl_proxy_marshal((struct wl_proxy*)zwp_linux_dmabuf_v1,
+                   ZWP_LINUX_DMABUF_V1_DESTROY);
+
+  wl_proxy_destroy((struct wl_proxy*)zwp_linux_dmabuf_v1);
+}
+
+/**
+ * @ingroup iface_zwp_linux_dmabuf_v1
+ *
+ * This temporary object is used to collect multiple dmabuf handles into
+ * a single batch to create a wl_buffer. It can only be used once and
+ * should be destroyed after a 'created' or 'failed' event has been
+ * received.
+ */
+static inline struct zwp_linux_buffer_params_v1*
+zwp_linux_dmabuf_v1_create_params(
+    struct zwp_linux_dmabuf_v1* zwp_linux_dmabuf_v1) {
+  struct wl_proxy* params_id;
+
+  params_id = wl_proxy_marshal_constructor(
+      (struct wl_proxy*)zwp_linux_dmabuf_v1, ZWP_LINUX_DMABUF_V1_CREATE_PARAMS,
+      &zwp_linux_buffer_params_v1_interface, NULL);
+
+  return (struct zwp_linux_buffer_params_v1*)params_id;
+}
+
+#ifndef ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_ENUM
+#  define ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_ENUM
+enum zwp_linux_buffer_params_v1_error {
+  /**
+   * the dmabuf_batch object has already been used to create a wl_buffer
+   */
+  ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_ALREADY_USED = 0,
+  /**
+   * plane index out of bounds
+   */
+  ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_PLANE_IDX = 1,
+  /**
+   * the plane index was already set
+   */
+  ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_PLANE_SET = 2,
+  /**
+   * missing or too many planes to create a buffer
+   */
+  ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INCOMPLETE = 3,
+  /**
+   * format not supported
+   */
+  ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INVALID_FORMAT = 4,
+  /**
+   * invalid width or height
+   */
+  ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INVALID_DIMENSIONS = 5,
+  /**
+   * offset + stride * height goes out of dmabuf bounds
+   */
+  ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_OUT_OF_BOUNDS = 6,
+  /**
+   * invalid wl_buffer resulted from importing dmabufs via                the
+   * create_immed request on given buffer_params
+   */
+  ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INVALID_WL_BUFFER = 7,
+};
+#endif /* ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_ENUM */
+
+#ifndef ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_ENUM
+#  define ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_ENUM
+enum zwp_linux_buffer_params_v1_flags {
+  /**
+   * contents are y-inverted
+   */
+  ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_Y_INVERT = 1,
+  /**
+   * content is interlaced
+   */
+  ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_INTERLACED = 2,
+  /**
+   * bottom field first
+   */
+  ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_BOTTOM_FIRST = 4,
+};
+#endif /* ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_ENUM */
+
+/**
+ * @ingroup iface_zwp_linux_buffer_params_v1
+ * @struct zwp_linux_buffer_params_v1_listener
+ */
+struct zwp_linux_buffer_params_v1_listener {
+  /**
+   * buffer creation succeeded
+   *
+   * This event indicates that the attempted buffer creation was
+   * successful. It provides the new wl_buffer referencing the
+   * dmabuf(s).
+   *
+   * Upon receiving this event, the client should destroy the
+   * zlinux_dmabuf_params object.
+   * @param buffer the newly created wl_buffer
+   */
+  void (*created)(void* data,
+                  struct zwp_linux_buffer_params_v1* zwp_linux_buffer_params_v1,
+                  struct wl_buffer* buffer);
+  /**
+   * buffer creation failed
+   *
+   * This event indicates that the attempted buffer creation has
+   * failed. It usually means that one of the dmabuf constraints has
+   * not been fulfilled.
+   *
+   * Upon receiving this event, the client should destroy the
+   * zlinux_buffer_params object.
+   */
+  void (*failed)(void* data,
+                 struct zwp_linux_buffer_params_v1* zwp_linux_buffer_params_v1);
+};
+
+/**
+ * @ingroup iface_zwp_linux_buffer_params_v1
+ */
+static inline int zwp_linux_buffer_params_v1_add_listener(
+    struct zwp_linux_buffer_params_v1* zwp_linux_buffer_params_v1,
+    const struct zwp_linux_buffer_params_v1_listener* listener, void* data) {
+  return wl_proxy_add_listener((struct wl_proxy*)zwp_linux_buffer_params_v1,
+                               (void (**)(void))listener, data);
+}
+
+#define ZWP_LINUX_BUFFER_PARAMS_V1_DESTROY 0
+#define ZWP_LINUX_BUFFER_PARAMS_V1_ADD 1
+#define ZWP_LINUX_BUFFER_PARAMS_V1_CREATE 2
+#define ZWP_LINUX_BUFFER_PARAMS_V1_CREATE_IMMED 3
+
+/**
+ * @ingroup iface_zwp_linux_buffer_params_v1
+ */
+#define ZWP_LINUX_BUFFER_PARAMS_V1_CREATED_SINCE_VERSION 1
+/**
+ * @ingroup iface_zwp_linux_buffer_params_v1
+ */
+#define ZWP_LINUX_BUFFER_PARAMS_V1_FAILED_SINCE_VERSION 1
+
+/**
+ * @ingroup iface_zwp_linux_buffer_params_v1
+ */
+#define ZWP_LINUX_BUFFER_PARAMS_V1_DESTROY_SINCE_VERSION 1
+/**
+ * @ingroup iface_zwp_linux_buffer_params_v1
+ */
+#define ZWP_LINUX_BUFFER_PARAMS_V1_ADD_SINCE_VERSION 1
+/**
+ * @ingroup iface_zwp_linux_buffer_params_v1
+ */
+#define ZWP_LINUX_BUFFER_PARAMS_V1_CREATE_SINCE_VERSION 1
+/**
+ * @ingroup iface_zwp_linux_buffer_params_v1
+ */
+#define ZWP_LINUX_BUFFER_PARAMS_V1_CREATE_IMMED_SINCE_VERSION 2
+
+/** @ingroup iface_zwp_linux_buffer_params_v1 */
+static inline void zwp_linux_buffer_params_v1_set_user_data(
+    struct zwp_linux_buffer_params_v1* zwp_linux_buffer_params_v1,
+    void* user_data) {
+  wl_proxy_set_user_data((struct wl_proxy*)zwp_linux_buffer_params_v1,
+                         user_data);
+}
+
+/** @ingroup iface_zwp_linux_buffer_params_v1 */
+static inline void* zwp_linux_buffer_params_v1_get_user_data(
+    struct zwp_linux_buffer_params_v1* zwp_linux_buffer_params_v1) {
+  return wl_proxy_get_user_data((struct wl_proxy*)zwp_linux_buffer_params_v1);
+}
+
+static inline uint32_t zwp_linux_buffer_params_v1_get_version(
+    struct zwp_linux_buffer_params_v1* zwp_linux_buffer_params_v1) {
+  return wl_proxy_get_version((struct wl_proxy*)zwp_linux_buffer_params_v1);
+}
+
+/**
+ * @ingroup iface_zwp_linux_buffer_params_v1
+ *
+ * Cleans up the temporary data sent to the server for dmabuf-based
+ * wl_buffer creation.
+ */
+static inline void zwp_linux_buffer_params_v1_destroy(
+    struct zwp_linux_buffer_params_v1* zwp_linux_buffer_params_v1) {
+  wl_proxy_marshal((struct wl_proxy*)zwp_linux_buffer_params_v1,
+                   ZWP_LINUX_BUFFER_PARAMS_V1_DESTROY);
+
+  wl_proxy_destroy((struct wl_proxy*)zwp_linux_buffer_params_v1);
+}
+
+/**
+ * @ingroup iface_zwp_linux_buffer_params_v1
+ *
+ * This request adds one dmabuf to the set in this
+ * zwp_linux_buffer_params_v1.
+ *
+ * The 64-bit unsigned value combined from modifier_hi and modifier_lo
+ * is the dmabuf layout modifier. DRM AddFB2 ioctl calls this the
+ * fb modifier, which is defined in drm_mode.h of Linux UAPI.
+ * This is an opaque token. Drivers use this token to express tiling,
+ * compression, etc. driver-specific modifications to the base format
+ * defined by the DRM fourcc code.
+ *
+ * This request raises the PLANE_IDX error if plane_idx is too large.
+ * The error PLANE_SET is raised if attempting to set a plane that
+ * was already set.
+ */
+static inline void zwp_linux_buffer_params_v1_add(
+    struct zwp_linux_buffer_params_v1* zwp_linux_buffer_params_v1, int32_t fd,
+    uint32_t plane_idx, uint32_t offset, uint32_t stride, uint32_t modifier_hi,
+    uint32_t modifier_lo) {
+  wl_proxy_marshal((struct wl_proxy*)zwp_linux_buffer_params_v1,
+                   ZWP_LINUX_BUFFER_PARAMS_V1_ADD, fd, plane_idx, offset,
+                   stride, modifier_hi, modifier_lo);
+}
+
+/**
+ * @ingroup iface_zwp_linux_buffer_params_v1
+ *
+ * This asks for creation of a wl_buffer from the added dmabuf
+ * buffers. The wl_buffer is not created immediately but returned via
+ * the 'created' event if the dmabuf sharing succeeds. The sharing
+ * may fail at runtime for reasons a client cannot predict, in
+ * which case the 'failed' event is triggered.
+ *
+ * The 'format' argument is a DRM_FORMAT code, as defined by the
+ * libdrm's drm_fourcc.h. The Linux kernel's DRM sub-system is the
+ * authoritative source on how the format codes should work.
+ *
+ * The 'flags' is a bitfield of the flags defined in enum "flags".
+ * 'y_invert' means the that the image needs to be y-flipped.
+ *
+ * Flag 'interlaced' means that the frame in the buffer is not
+ * progressive as usual, but interlaced. An interlaced buffer as
+ * supported here must always contain both top and bottom fields.
+ * The top field always begins on the first pixel row. The temporal
+ * ordering between the two fields is top field first, unless
+ * 'bottom_first' is specified. It is undefined whether 'bottom_first'
+ * is ignored if 'interlaced' is not set.
+ *
+ * This protocol does not convey any information about field rate,
+ * duration, or timing, other than the relative ordering between the
+ * two fields in one buffer. A compositor may have to estimate the
+ * intended field rate from the incoming buffer rate. It is undefined
+ * whether the time of receiving wl_surface.commit with a new buffer
+ * attached, applying the wl_surface state, wl_surface.frame callback
+ * trigger, presentation, or any other point in the compositor cycle
+ * is used to measure the frame or field times. There is no support
+ * for detecting missed or late frames/fields/buffers either, and
+ * there is no support whatsoever for cooperating with interlaced
+ * compositor output.
+ *
+ * The composited image quality resulting from the use of interlaced
+ * buffers is explicitly undefined. A compositor may use elaborate
+ * hardware features or software to deinterlace and create progressive
+ * output frames from a sequence of interlaced input buffers, or it
+ * may produce substandard image quality. However, compositors that
+ * cannot guarantee reasonable image quality in all cases are recommended
+ * to just reject all interlaced buffers.
+ *
+ * Any argument errors, including non-positive width or height,
+ * mismatch between the number of planes and the format, bad
+ * format, bad offset or stride, may be indicated by fatal protocol
+ * errors: INCOMPLETE, INVALID_FORMAT, INVALID_DIMENSIONS,
+ * OUT_OF_BOUNDS.
+ *
+ * Dmabuf import errors in the server that are not obvious client
+ * bugs are returned via the 'failed' event as non-fatal. This
+ * allows attempting dmabuf sharing and falling back in the client
+ * if it fails.
+ *
+ * This request can be sent only once in the object's lifetime, after
+ * which the only legal request is destroy. This object should be
+ * destroyed after issuing a 'create' request. Attempting to use this
+ * object after issuing 'create' raises ALREADY_USED protocol error.
+ *
+ * It is not mandatory to issue 'create'. If a client wants to
+ * cancel the buffer creation, it can just destroy this object.
+ */
+static inline void zwp_linux_buffer_params_v1_create(
+    struct zwp_linux_buffer_params_v1* zwp_linux_buffer_params_v1,
+    int32_t width, int32_t height, uint32_t format, uint32_t flags) {
+  wl_proxy_marshal((struct wl_proxy*)zwp_linux_buffer_params_v1,
+                   ZWP_LINUX_BUFFER_PARAMS_V1_CREATE, width, height, format,
+                   flags);
+}
+
+/**
+ * @ingroup iface_zwp_linux_buffer_params_v1
+ *
+ * This asks for immediate creation of a wl_buffer by importing the
+ * added dmabufs.
+ *
+ * In case of import success, no event is sent from the server, and the
+ * wl_buffer is ready to be used by the client.
+ *
+ * Upon import failure, either of the following may happen, as seen fit
+ * by the implementation:
+ * - the client is terminated with one of the following fatal protocol
+ * errors:
+ * - INCOMPLETE, INVALID_FORMAT, INVALID_DIMENSIONS, OUT_OF_BOUNDS,
+ * in case of argument errors such as mismatch between the number
+ * of planes and the format, bad format, non-positive width or
+ * height, or bad offset or stride.
+ * - INVALID_WL_BUFFER, in case the cause for failure is unknown or
+ * plaform specific.
+ * - the server creates an invalid wl_buffer, marks it as failed and
+ * sends a 'failed' event to the client. The result of using this
+ * invalid wl_buffer as an argument in any request by the client is
+ * defined by the compositor implementation.
+ *
+ * This takes the same arguments as a 'create' request, and obeys the
+ * same restrictions.
+ */
+static inline struct wl_buffer* zwp_linux_buffer_params_v1_create_immed(
+    struct zwp_linux_buffer_params_v1* zwp_linux_buffer_params_v1,
+    int32_t width, int32_t height, uint32_t format, uint32_t flags) {
+  struct wl_proxy* buffer_id;
+
+  buffer_id = wl_proxy_marshal_constructor(
+      (struct wl_proxy*)zwp_linux_buffer_params_v1,
+      ZWP_LINUX_BUFFER_PARAMS_V1_CREATE_IMMED, &wl_buffer_interface, NULL,
+      width, height, format, flags);
+
+  return (struct wl_buffer*)buffer_id;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/widget/gtk/wayland/linux-dmabuf-unstable-v1-protocol.c b/widget/gtk/wayland/linux-dmabuf-unstable-v1-protocol.c
new file mode 100644
--- /dev/null
+++ b/widget/gtk/wayland/linux-dmabuf-unstable-v1-protocol.c
@@ -0,0 +1,81 @@
+/* Generated by wayland-scanner 1.17.0 */
+
+/*
+ * Copyright © 2014, 2015 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include "wayland-util.h"
+
+#pragma GCC visibility push(default)
+extern const struct wl_interface wl_buffer_interface;
+extern const struct wl_interface zwp_linux_buffer_params_v1_interface;
+#pragma GCC visibility pop
+
+static const struct wl_interface* types[] = {
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    &zwp_linux_buffer_params_v1_interface,
+    &wl_buffer_interface,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    &wl_buffer_interface,
+};
+
+static const struct wl_message zwp_linux_dmabuf_v1_requests[] = {
+    {"destroy", "", types + 0},
+    {"create_params", "n", types + 6},
+};
+
+static const struct wl_message zwp_linux_dmabuf_v1_events[] = {
+    {"format", "u", types + 0},
+    {"modifier", "3uuu", types + 0},
+};
+
+const struct wl_interface zwp_linux_dmabuf_v1_interface = {
+    "zwp_linux_dmabuf_v1",        3, 2,
+    zwp_linux_dmabuf_v1_requests, 2, zwp_linux_dmabuf_v1_events,
+};
+
+static const struct wl_message zwp_linux_buffer_params_v1_requests[] = {
+    {"destroy", "", types + 0},
+    {"add", "huuuuu", types + 0},
+    {"create", "iiuu", types + 0},
+    {"create_immed", "2niiuu", types + 7},
+};
+
+static const struct wl_message zwp_linux_buffer_params_v1_events[] = {
+    {"created", "n", types + 12},
+    {"failed", "", types + 0},
+};
+
+const struct wl_interface zwp_linux_buffer_params_v1_interface = {
+    "zwp_linux_buffer_params_v1",        3, 4,
+    zwp_linux_buffer_params_v1_requests, 2, zwp_linux_buffer_params_v1_events,
+};
diff --git a/widget/gtk/wayland/moz.build b/widget/gtk/wayland/moz.build
--- a/widget/gtk/wayland/moz.build
+++ b/widget/gtk/wayland/moz.build
@@ -4,16 +4,22 @@
 # 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/.
 
 with Files("**"):
     BUG_COMPONENT = ("Core", "Widget: Gtk")
 
 SOURCES += [
     'gtk-primary-selection-protocol.c',
+    'linux-dmabuf-unstable-v1-protocol.c'
+]
+
+EXPORTS.mozilla.widget += [
+    'gtk-primary-selection-client-protocol.h',
+    'linux-dmabuf-unstable-v1-client-protocol.h',
 ]
 
 include('/ipc/chromium/chromium-config.mozbuild')
 
 FINAL_LIBRARY = 'xul'
 
 CFLAGS += CONFIG['TK_CFLAGS']
 CXXFLAGS += CONFIG['TK_CFLAGS']