1 files changed, 182 insertions, 0 deletions
diff --git a/gfx/layers/NativeLayerWayland.h b/gfx/layers/NativeLayerWayland.h
new file mode 100644
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+++ b/gfx/layers/NativeLayerWayland.h
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+/* -*- 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 mozilla_layers_NativeLayerWayland_h
+#define mozilla_layers_NativeLayerWayland_h
+
+#include <deque>
+#include <unordered_map>
+
+#include "mozilla/Mutex.h"
+#include "mozilla/layers/NativeLayer.h"
+#include "mozilla/layers/SurfacePoolWayland.h"
+#include "mozilla/widget/MozContainerWayland.h"
+#include "nsRegion.h"
+#include "nsTArray.h"
+
+namespace mozilla::layers {
+
+typedef void (*CallbackFunc)(void* aData, uint32_t aTime);
+
+class CallbackMultiplexHelper final {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CallbackMultiplexHelper);
+
+  explicit CallbackMultiplexHelper(CallbackFunc aCallbackFunc,
+                                   void* aCallbackData);
+
+  void Callback(uint32_t aTime);
+  bool IsActive() { return mActive; }
+
+ private:
+  ~CallbackMultiplexHelper() = default;
+
+  void RunCallback(uint32_t aTime);
+
+  bool mActive = true;
+  CallbackFunc mCallbackFunc = nullptr;
+  void* mCallbackData = nullptr;
+};
+
+class NativeLayerRootWayland final : public NativeLayerRoot {
+ public:
+  static already_AddRefed<NativeLayerRootWayland> CreateForMozContainer(
+      MozContainer* aContainer);
+
+  virtual NativeLayerRootWayland* AsNativeLayerRootWayland() override {
+    return this;
+  }
+
+  // Overridden methods
+  already_AddRefed<NativeLayer> CreateLayer(
+      const gfx::IntSize& aSize, bool aIsOpaque,
+      SurfacePoolHandle* aSurfacePoolHandle) override;
+  already_AddRefed<NativeLayer> CreateLayerForExternalTexture(
+      bool aIsOpaque) override;
+
+  void AppendLayer(NativeLayer* aLayer) override;
+  void RemoveLayer(NativeLayer* aLayer) override;
+  void SetLayers(const nsTArray<RefPtr<NativeLayer>>& aLayers) override;
+
+  void PrepareForCommit() override { mFrameInProcess = true; };
+  bool CommitToScreen() override;
+
+  void UpdateLayersOnMainThread();
+  void AfterFrameClockAfterPaint();
+  void RequestFrameCallback(CallbackFunc aCallbackFunc, void* aCallbackData);
+
+ private:
+  explicit NativeLayerRootWayland(MozContainer* aContainer);
+  ~NativeLayerRootWayland();
+
+  bool CommitToScreen(const MutexAutoLock& aProofOfLock);
+
+  Mutex mMutex MOZ_UNANNOTATED;
+
+  MozContainer* mContainer = nullptr;
+  wl_surface* mWlSurface = nullptr;
+  RefPtr<widget::WaylandBufferSHM> mShmBuffer;
+
+  nsTArray<RefPtr<NativeLayerWayland>> mSublayers;
+  nsTArray<RefPtr<NativeLayerWayland>> mOldSublayers;
+  nsTArray<RefPtr<NativeLayerWayland>> mSublayersOnMainThread;
+  bool mNewLayers = false;
+
+  bool mFrameInProcess = false;
+  bool mCallbackRequested = false;
+
+  gulong mGdkAfterPaintId = 0;
+  RefPtr<CallbackMultiplexHelper> mCallbackMultiplexHelper;
+};
+
+class NativeLayerWayland final : public NativeLayer {
+ public:
+  virtual NativeLayerWayland* AsNativeLayerWayland() override { return this; }
+
+  // Overridden methods
+  gfx::IntSize GetSize() override;
+  void SetPosition(const gfx::IntPoint& aPosition) override;
+  gfx::IntPoint GetPosition() override;
+  void SetTransform(const gfx::Matrix4x4& aTransform) override;
+  gfx::Matrix4x4 GetTransform() override;
+  gfx::IntRect GetRect() override;
+  void SetSamplingFilter(gfx::SamplingFilter aSamplingFilter) override;
+  RefPtr<gfx::DrawTarget> NextSurfaceAsDrawTarget(
+      const gfx::IntRect& aDisplayRect, const gfx::IntRegion& aUpdateRegion,
+      gfx::BackendType aBackendType) override;
+  Maybe<GLuint> NextSurfaceAsFramebuffer(const gfx::IntRect& aDisplayRect,
+                                         const gfx::IntRegion& aUpdateRegion,
+                                         bool aNeedsDepth) override;
+  void NotifySurfaceReady() override;
+  void DiscardBackbuffers() override;
+  bool IsOpaque() override;
+  void SetClipRect(const Maybe<gfx::IntRect>& aClipRect) override;
+  Maybe<gfx::IntRect> ClipRect() override;
+  gfx::IntRect CurrentSurfaceDisplayRect() override;
+  void SetSurfaceIsFlipped(bool aIsFlipped) override;
+  bool SurfaceIsFlipped() override;
+
+  void AttachExternalImage(wr::RenderTextureHost* aExternalImage) override;
+
+  void Commit();
+  void Unmap();
+  void EnsureParentSurface(wl_surface* aParentSurface);
+  const RefPtr<SurfacePoolHandleWayland> GetSurfacePoolHandle() {
+    return mSurfacePoolHandle;
+  };
+  void SetBufferTransformFlipped(bool aFlippedX, bool aFlippedY);
+  void SetSubsurfacePosition(int aX, int aY);
+  void SetViewportSourceRect(const gfx::Rect aSourceRect);
+  void SetViewportDestinationSize(int aWidth, int aHeight);
+
+  void RequestFrameCallback(
+      const RefPtr<CallbackMultiplexHelper>& aMultiplexHelper);
+  static void FrameCallbackHandler(void* aData, wl_callback* aCallback,
+                                   uint32_t aTime);
+
+ private:
+  friend class NativeLayerRootWayland;
+
+  NativeLayerWayland(const gfx::IntSize& aSize, bool aIsOpaque,
+                     SurfacePoolHandleWayland* aSurfacePoolHandle);
+  explicit NativeLayerWayland(bool aIsOpaque);
+  ~NativeLayerWayland() override;
+
+  void HandlePartialUpdate(const MutexAutoLock& aProofOfLock);
+  void FrameCallbackHandler(wl_callback* aCallback, uint32_t aTime);
+
+  Mutex mMutex MOZ_UNANNOTATED;
+
+  const RefPtr<SurfacePoolHandleWayland> mSurfacePoolHandle;
+  const gfx::IntSize mSize;
+  const bool mIsOpaque = false;
+  gfx::IntPoint mPosition;
+  gfx::Matrix4x4 mTransform;
+  gfx::IntRect mDisplayRect;
+  gfx::IntRegion mDirtyRegion;
+  Maybe<gfx::IntRect> mClipRect;
+  gfx::SamplingFilter mSamplingFilter = gfx::SamplingFilter::POINT;
+  bool mSurfaceIsFlipped = false;
+  bool mHasBufferAttached = false;
+
+  wl_surface* mWlSurface = nullptr;
+  wl_surface* mParentWlSurface = nullptr;
+  wl_subsurface* mWlSubsurface = nullptr;
+  wl_callback* mCallback = nullptr;
+  wp_viewport* mViewport = nullptr;
+  bool mBufferTransformFlippedX = false;
+  bool mBufferTransformFlippedY = false;
+  gfx::IntPoint mSubsurfacePosition = gfx::IntPoint(0, 0);
+  gfx::Rect mViewportSourceRect = gfx::Rect(-1, -1, -1, -1);
+  gfx::IntSize mViewportDestinationSize = gfx::IntSize(-1, -1);
+  nsTArray<RefPtr<CallbackMultiplexHelper>> mCallbackMultiplexHelpers;
+
+  RefPtr<widget::WaylandBuffer> mInProgressBuffer;
+  RefPtr<widget::WaylandBuffer> mFrontBuffer;
+};
+
+}  // namespace mozilla::layers
+
+#endif  // mozilla_layers_NativeLayerWayland_h