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-rw-r--r--widget/gtk/WindowSurfaceProvider.h101
1 files changed, 101 insertions, 0 deletions
diff --git a/widget/gtk/WindowSurfaceProvider.h b/widget/gtk/WindowSurfaceProvider.h
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+/* -*- 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/. */
+
+#ifndef _MOZILLA_WIDGET_GTK_WINDOW_SURFACE_PROVIDER_H
+#define _MOZILLA_WIDGET_GTK_WINDOW_SURFACE_PROVIDER_H
+
+#include <gdk/gdk.h>
+
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/Types.h"
+#include "mozilla/layers/LayersTypes.h"
+#include "mozilla/widget/WindowSurface.h"
+#include "Units.h"
+#include "mozilla/ScopeExit.h"
+
+#ifdef MOZ_X11
+# include <X11/Xlib.h> // for Window, Display, Visual, etc.
+# include "X11UndefineNone.h"
+#endif
+
+class nsWindow;
+
+namespace mozilla {
+namespace widget {
+
+class GtkCompositorWidget;
+
+/*
+ * 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 GtkCompositorWidget, for when OMTC is enabled or disabled.
+ */
+class WindowSurfaceProvider final {
+ public:
+ WindowSurfaceProvider();
+ ~WindowSurfaceProvider() = default;
+
+ /**
+ * 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.
+ */
+#ifdef MOZ_WAYLAND
+ void Initialize(RefPtr<nsWindow> aWidget);
+ void Initialize(GtkCompositorWidget* aCompositorWidget);
+#endif
+#ifdef MOZ_X11
+ void Initialize(Window aWindow, Visual* aVisual, int aDepth, bool aIsShaped);
+#endif
+
+ /**
+ * Releases any surfaces created by this provider.
+ * This is used by GtkCompositorWidget to get rid
+ * of resources.
+ */
+ void CleanupResources();
+
+ already_AddRefed<gfx::DrawTarget> StartRemoteDrawingInRegion(
+ const LayoutDeviceIntRegion& aInvalidRegion,
+ layers::BufferMode* aBufferMode);
+ void EndRemoteDrawingInRegion(gfx::DrawTarget* aDrawTarget,
+ const LayoutDeviceIntRegion& aInvalidRegion);
+
+ private:
+ RefPtr<WindowSurface> CreateWindowSurface();
+ void CleanupWindowSurface();
+
+ RefPtr<WindowSurface> mWindowSurface;
+
+ /* While CleanupResources() can be called from Main thread when nsWindow is
+ * destroyed/hidden, StartRemoteDrawingInRegion()/EndRemoteDrawingInRegion()
+ * is called from Compositor thread during rendering.
+ *
+ * As nsWindow CleanupResources() call comes from Gtk/X11 we can't synchronize
+ * that with WebRender so we use lock to synchronize the access.
+ */
+ mozilla::Mutex mMutex MOZ_UNANNOTATED;
+ // WindowSurface needs to be re-created as underlying window was changed.
+ mozilla::Atomic<bool> mWindowSurfaceValid;
+#ifdef MOZ_WAYLAND
+ RefPtr<nsWindow> mWidget;
+ // WindowSurfaceProvider is owned by GtkCompositorWidget so we don't need
+ // to reference it.
+ GtkCompositorWidget* mCompositorWidget = nullptr;
+#endif
+#ifdef MOZ_X11
+ bool mIsShaped;
+ int mXDepth;
+ Window mXWindow;
+ Visual* mXVisual;
+#endif
+};
+
+} // namespace widget
+} // namespace mozilla
+
+#endif // _MOZILLA_WIDGET_GTK_WINDOW_SURFACE_PROVIDER_H