1 files changed, 69 insertions, 0 deletions
diff --git a/widget/gtk/WindowSurfaceProvider.h b/widget/gtk/WindowSurfaceProvider.h
new file mode 100644
index 0000000000..73b23031e5
--- /dev/null
+++ b/widget/gtk/WindowSurfaceProvider.h
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 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 _MOZILLA_WIDGET_GTK_WINDOW_SURFACE_PROVIDER_H
+#define _MOZILLA_WIDGET_GTK_WINDOW_SURFACE_PROVIDER_H
+
+#include "mozilla/widget/WindowSurface.h"
+#include "mozilla/gfx/Types.h"
+#include "mozilla/gfx/2D.h"
+#include "Units.h"
+
+#include <X11/Xlib.h> // for Window, Display, Visual, etc.
+
+namespace mozilla {
+namespace widget {
+
+/*
+ * Holds the logic for creating WindowSurface's for a GTK nsWindow.
+ * The main purpose of this class is to allow sharing of logic between
+ * nsWindow and X11CompositorWidget, for when OMTC is enabled or disabled.
+ */
+class WindowSurfaceProvider final
+{
+public:
+  WindowSurfaceProvider();
+
+  /**
+   * Initializes the WindowSurfaceProvider by giving it the window
+   * handle and display to attach to. WindowSurfaceProvider doesn't
+   * own the Display, Window, etc, and they must continue to exist
+   * while WindowSurfaceProvider is used.
+   */
+  void Initialize(
+      Display* aDisplay,
+      Window aWindow,
+      Visual* aVisual,
+      int aDepth);
+
+  /**
+   * Releases any surfaces created by this provider.
+   * This is used by X11CompositorWidget to get rid
+   * of resources before we close the display connection.
+   */
+  void CleanupResources();
+
+  already_AddRefed<gfx::DrawTarget>
+  StartRemoteDrawingInRegion(LayoutDeviceIntRegion& aInvalidRegion,
+                             layers::BufferMode* aBufferMode);
+  void EndRemoteDrawingInRegion(gfx::DrawTarget* aDrawTarget,
+                                LayoutDeviceIntRegion& aInvalidRegion);
+
+private:
+  UniquePtr<WindowSurface> CreateWindowSurface();
+
+  Display*  mXDisplay;
+  Window    mXWindow;
+  Visual*   mXVisual;
+  int       mXDepth;
+
+  UniquePtr<WindowSurface> mWindowSurface;
+};
+
+}  // namespace widget
+}  // namespace mozilla
+
+#endif // _MOZILLA_WIDGET_GTK_WINDOW_SURFACE_PROVIDER_H