1 files changed, 140 insertions, 0 deletions
diff --git a/widget/gtk/GtkCompositorWidget.h b/widget/gtk/GtkCompositorWidget.h
new file mode 100644
index 0000000000..5bf89835d7
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+++ b/widget/gtk/GtkCompositorWidget.h
@@ -0,0 +1,140 @@
+/* -*- Mode: C++; tab-width: 2; 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/. */
+
+#ifndef widget_gtk_GtkCompositorWidget_h
+#define widget_gtk_GtkCompositorWidget_h
+
+#include "GLDefs.h"
+#include "mozilla/DataMutex.h"
+#include "mozilla/widget/CompositorWidget.h"
+#include "WindowSurfaceProvider.h"
+
+class nsIWidget;
+class nsWindow;
+
+namespace mozilla {
+
+namespace layers {
+class NativeLayerRootWayland;
+}  // namespace layers
+
+namespace widget {
+
+class PlatformCompositorWidgetDelegate : public CompositorWidgetDelegate {
+ public:
+  virtual void NotifyClientSizeChanged(
+      const LayoutDeviceIntSize& aClientSize) = 0;
+  virtual GtkCompositorWidget* AsGtkCompositorWidget() { return nullptr; };
+
+  virtual void DisableRendering() = 0;
+  virtual void EnableRendering(const uintptr_t aXWindow,
+                               const bool aShaped) = 0;
+
+  // CompositorWidgetDelegate Overrides
+
+  PlatformCompositorWidgetDelegate* AsPlatformSpecificDelegate() override {
+    return this;
+  }
+};
+
+class GtkCompositorWidgetInitData;
+
+class GtkCompositorWidget : public CompositorWidget,
+                            public PlatformCompositorWidgetDelegate {
+ public:
+  GtkCompositorWidget(const GtkCompositorWidgetInitData& aInitData,
+                      const layers::CompositorOptions& aOptions,
+                      RefPtr<nsWindow> aWindow /* = nullptr*/);
+  ~GtkCompositorWidget();
+
+  // CompositorWidget Overrides
+
+  already_AddRefed<gfx::DrawTarget> StartRemoteDrawing() override;
+  void EndRemoteDrawing() override;
+
+  already_AddRefed<gfx::DrawTarget> StartRemoteDrawingInRegion(
+      const LayoutDeviceIntRegion& aInvalidRegion,
+      layers::BufferMode* aBufferMode) override;
+  void EndRemoteDrawingInRegion(
+      gfx::DrawTarget* aDrawTarget,
+      const LayoutDeviceIntRegion& aInvalidRegion) override;
+
+  LayoutDeviceIntSize GetClientSize() override;
+  void RemoteLayoutSizeUpdated(const LayoutDeviceRect& aSize);
+
+  nsIWidget* RealWidget() override;
+  GtkCompositorWidget* AsGTK() override { return this; }
+  CompositorWidgetDelegate* AsDelegate() override { return this; }
+
+  EGLNativeWindowType GetEGLNativeWindow();
+
+  LayoutDeviceIntRegion GetTransparentRegion() override;
+
+  // Suspend rendering of this remote widget and clear all resources.
+  // Can be used when underlying window is hidden/unmapped.
+  void DisableRendering() override;
+
+  // Resume rendering with to given aXWindow (X11) or nsWindow (Wayland).
+  void EnableRendering(const uintptr_t aXWindow, const bool aShaped) override;
+
+  // If we fail to set window size (due to different screen scale or so)
+  // we can't paint the frame by compositor.
+  bool SetEGLNativeWindowSize(const LayoutDeviceIntSize& aEGLWindowSize);
+
+#if defined(MOZ_X11)
+  Window XWindow() const { return mXWindow; }
+#endif
+#if defined(MOZ_WAYLAND)
+  RefPtr<mozilla::layers::NativeLayerRoot> GetNativeLayerRoot() override;
+#endif
+
+  bool PreRender(WidgetRenderingContext* aContext) override {
+    return !mIsRenderingSuspended;
+  }
+  bool IsHidden() const override { return mIsRenderingSuspended; }
+
+  // PlatformCompositorWidgetDelegate Overrides
+
+  void NotifyClientSizeChanged(const LayoutDeviceIntSize& aClientSize) override;
+  GtkCompositorWidget* AsGtkCompositorWidget() override { return this; }
+
+ private:
+#if defined(MOZ_WAYLAND)
+  bool ConfigureWaylandBackend();
+#endif
+#if defined(MOZ_X11)
+  bool ConfigureX11Backend(Window aXWindow, bool aShaped);
+#endif
+#ifdef MOZ_LOGGING
+  bool IsPopup();
+#endif
+
+ protected:
+  RefPtr<nsWindow> mWidget;
+
+ private:
+  // This field is written to on the main thread and read from on the compositor
+  // or renderer thread. During window resizing, this is subject to a (largely
+  // benign) read/write race, see bug 1665726. The DataMutex doesn't prevent the
+  // read/write race, but it does make it Not Undefined Behaviour, and also
+  // ensures we only ever use the old or new size, and not some weird synthesis
+  // of the two.
+  DataMutex<LayoutDeviceIntSize> mClientSize;
+
+  WindowSurfaceProvider mProvider;
+
+#if defined(MOZ_X11)
+  Window mXWindow = {};
+#endif
+#ifdef MOZ_WAYLAND
+  RefPtr<mozilla::layers::NativeLayerRootWayland> mNativeLayerRoot;
+#endif
+  Atomic<bool> mIsRenderingSuspended{true};
+};
+
+}  // namespace widget
+}  // namespace mozilla
+
+#endif  // widget_gtk_GtkCompositorWidget_h