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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_WAYLAND_MULTI_BUFFER_H
#define _MOZILLA_WIDGET_GTK_WINDOW_SURFACE_WAYLAND_MULTI_BUFFER_H
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Types.h"
#include "mozilla/Mutex.h"
#include "nsTArray.h"
#include "nsWaylandDisplay.h"
#include "nsWindow.h"
#include "WaylandBuffer.h"
#include "WindowSurface.h"
namespace mozilla::widget {
using gfx::DrawTarget;
// WindowSurfaceWaylandMB is an abstraction for wl_surface
// and related management
class WindowSurfaceWaylandMB : public WindowSurface {
public:
WindowSurfaceWaylandMB(RefPtr<nsWindow> aWindow,
GtkCompositorWidget* aCompositorWidget);
~WindowSurfaceWaylandMB() = default;
// Lock() / Commit() are called by gecko when Firefox
// wants to display something. Lock() returns a DrawTarget
// where gecko paints. When gecko is done it calls Commit()
// and we try to send the DrawTarget (backed by wl_buffer)
// to wayland compositor.
//
// If we fail (wayland compositor is busy,
// wl_surface is not created yet) we queue the painting
// and we send it to wayland compositor in FrameCallbackHandler()/
// FlushPendingCommits().
already_AddRefed<DrawTarget> Lock(
const LayoutDeviceIntRegion& aInvalidRegion) override;
void Commit(const LayoutDeviceIntRegion& aInvalidRegion) final;
private:
void Commit(const MutexAutoLock& aProofOfLock,
const LayoutDeviceIntRegion& aInvalidRegion);
RefPtr<WaylandBufferSHM> ObtainBufferFromPool(
const MutexAutoLock& aProofOfLock, const LayoutDeviceIntSize& aSize);
void ReturnBufferToPool(const MutexAutoLock& aProofOfLock,
const RefPtr<WaylandBufferSHM>& aBuffer);
void EnforcePoolSizeLimit(const MutexAutoLock& aProofOfLock);
void CollectPendingSurfaces(const MutexAutoLock& aProofOfLock);
void HandlePartialUpdate(const MutexAutoLock& aProofOfLock,
const LayoutDeviceIntRegion& aInvalidRegion);
void IncrementBufferAge(const MutexAutoLock& aProofOfLock);
// Return true if window size was updated.
bool MaybeUpdateWindowSize();
mozilla::Mutex mSurfaceLock MOZ_UNANNOTATED;
RefPtr<nsWindow> mWindow;
// WindowSurfaceWaylandMB is owned by GtkCompositorWidget so we can't
// reference it.
GtkCompositorWidget* mCompositorWidget;
LayoutDeviceIntSize mWindowSize;
RefPtr<WaylandBufferSHM> mInProgressBuffer;
RefPtr<WaylandBufferSHM> mFrontBuffer;
LayoutDeviceIntRegion mFrontBufferInvalidRegion;
// buffer pool
nsTArray<RefPtr<WaylandBufferSHM>> mInUseBuffers;
nsTArray<RefPtr<WaylandBufferSHM>> mPendingBuffers;
nsTArray<RefPtr<WaylandBufferSHM>> mAvailableBuffers;
// delayed commits
bool mFrameInProcess;
bool mCallbackRequested;
};
} // namespace mozilla::widget
#endif // _MOZILLA_WIDGET_GTK_WINDOW_SURFACE_WAYLAND_MULTI_BUFFER_H
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