1 files changed, 131 insertions, 0 deletions
diff --git a/widget/gtk/WindowSurfaceProvider.cpp b/widget/gtk/WindowSurfaceProvider.cpp
new file mode 100644
index 0000000000..282847a512
--- /dev/null
+++ b/widget/gtk/WindowSurfaceProvider.cpp
@@ -0,0 +1,131 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WindowSurfaceProvider.h"
+
+#include "gfxPlatformGtk.h"
+#include "mozilla/gfx/Logging.h"
+#include "mozilla/layers/LayersTypes.h"
+#include "nsWindow.h"
+#include "WindowSurfaceX11Image.h"
+#include "WindowSurfaceX11SHM.h"
+#include "WindowSurfaceXRender.h"
+#ifdef MOZ_WAYLAND
+#  include "WindowSurfaceWayland.h"
+#endif
+
+namespace mozilla {
+namespace widget {
+
+using namespace mozilla::layers;
+
+WindowSurfaceProvider::WindowSurfaceProvider()
+    : mIsX11Display(false),
+      mXDisplay(nullptr),
+      mXWindow(0),
+      mXVisual(nullptr),
+      mXDepth(0),
+      mWindowSurface(nullptr)
+#ifdef MOZ_WAYLAND
+      ,
+      mWidget(nullptr)
+#endif
+      ,
+      mIsShaped(false) {
+}
+
+void WindowSurfaceProvider::Initialize(Display* aDisplay, Window aWindow,
+                                       Visual* aVisual, int aDepth,
+                                       bool aIsShaped) {
+  // We should not be initialized
+  MOZ_ASSERT(!mXDisplay);
+
+  // This should also be a valid initialization
+  MOZ_ASSERT(aDisplay && aWindow != X11None && aVisual);
+
+  mXDisplay = aDisplay;
+  mXWindow = aWindow;
+  mXVisual = aVisual;
+  mXDepth = aDepth;
+  mIsShaped = aIsShaped;
+  mIsX11Display = true;
+}
+
+#ifdef MOZ_WAYLAND
+void WindowSurfaceProvider::Initialize(nsWindow* aWidget) {
+  mWidget = aWidget;
+  mIsX11Display = false;
+}
+#endif
+
+void WindowSurfaceProvider::CleanupResources() { mWindowSurface = nullptr; }
+
+UniquePtr<WindowSurface> WindowSurfaceProvider::CreateWindowSurface() {
+#ifdef MOZ_WAYLAND
+  if (!mIsX11Display) {
+    LOGDRAW(("Drawing to nsWindow %p will use wl_surface\n", mWidget));
+    return MakeUnique<WindowSurfaceWayland>(mWidget);
+  }
+#endif
+
+  // We should be initialized
+  MOZ_ASSERT(mXDisplay);
+
+  // Blit to the window with the following priority:
+  // 1. XRender (iff XRender is enabled && we are in-process)
+  // 2. MIT-SHM
+  // 3. XPutImage
+  if (!mIsShaped && gfx::gfxVars::UseXRender()) {
+    LOGDRAW(("Drawing to Window 0x%lx will use XRender\n", mXWindow));
+    return MakeUnique<WindowSurfaceXRender>(mXDisplay, mXWindow, mXVisual,
+                                            mXDepth);
+  }
+
+#ifdef MOZ_HAVE_SHMIMAGE
+  if (!mIsShaped && nsShmImage::UseShm()) {
+    LOGDRAW(("Drawing to Window 0x%lx will use MIT-SHM\n", mXWindow));
+    return MakeUnique<WindowSurfaceX11SHM>(mXDisplay, mXWindow, mXVisual,
+                                           mXDepth);
+  }
+#endif  // MOZ_HAVE_SHMIMAGE
+
+  LOGDRAW(("Drawing to Window 0x%lx will use XPutImage\n", mXWindow));
+  return MakeUnique<WindowSurfaceX11Image>(mXDisplay, mXWindow, mXVisual,
+                                           mXDepth, mIsShaped);
+}
+
+already_AddRefed<gfx::DrawTarget>
+WindowSurfaceProvider::StartRemoteDrawingInRegion(
+    LayoutDeviceIntRegion& aInvalidRegion, layers::BufferMode* aBufferMode) {
+  if (aInvalidRegion.IsEmpty()) return nullptr;
+
+  if (!mWindowSurface) {
+    mWindowSurface = CreateWindowSurface();
+    if (!mWindowSurface) return nullptr;
+  }
+
+  *aBufferMode = BufferMode::BUFFER_NONE;
+  RefPtr<gfx::DrawTarget> dt = nullptr;
+  if (!(dt = mWindowSurface->Lock(aInvalidRegion)) && mIsX11Display &&
+      !mWindowSurface->IsFallback()) {
+    // We can't use WindowSurfaceX11Image fallback on Wayland but
+    // Lock() call on WindowSurfaceWayland should never fail.
+    gfxWarningOnce()
+        << "Failed to lock WindowSurface, falling back to XPutImage backend.";
+    mWindowSurface = MakeUnique<WindowSurfaceX11Image>(
+        mXDisplay, mXWindow, mXVisual, mXDepth, mIsShaped);
+    dt = mWindowSurface->Lock(aInvalidRegion);
+  }
+  return dt.forget();
+}
+
+void WindowSurfaceProvider::EndRemoteDrawingInRegion(
+    gfx::DrawTarget* aDrawTarget, const LayoutDeviceIntRegion& aInvalidRegion) {
+  if (mWindowSurface) mWindowSurface->Commit(aInvalidRegion);
+}
+
+}  // namespace widget
+}  // namespace mozilla