Bug 1332249 - Add WebRenderCompositableHolder for WebRenderAPI r=nical?

gfx/layers/wr/WebRenderCompositableHolder.cpp

@@ -0,0 +1,59 @@
+/* -*- Mode: C++; tab-width: 20; 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/. */
+
+#include "WebRenderCompositableHolder.h"
+
+#include "CompositableHost.h"
+//#include "mozilla/layers/CompositorBridgeParent.h"
+
+namespace mozilla {
+
+using namespace gfx;
+
+namespace layers {
+
+WebRenderCompositableHolder::WebRenderCompositableHolder()
+{
+  MOZ_COUNT_CTOR(WebRenderCompositableHolder);
+}
+
+WebRenderCompositableHolder::~WebRenderCompositableHolder()
+{
+  MOZ_COUNT_DTOR(WebRenderCompositableHolder);
+  Destroy();
+}
+
+void
+WebRenderCompositableHolder::Destroy()
+{
+  mCompositableHosts.Clear();
+}
+
+void
+WebRenderCompositableHolder::AddExternalImageId(uint64_t aExternalImageId, CompositableHost* aHost)
+{
+  MOZ_ASSERT(!mCompositableHosts.Get(aExternalImageId));
+  mCompositableHosts.Put(aExternalImageId, aHost);
+}
+
+void
+WebRenderCompositableHolder::RemoveExternalImageId(uint64_t aExternalImageId)
+{
+  MOZ_ASSERT(mCompositableHosts.Get(aExternalImageId));
+  mCompositableHosts.Remove(aExternalImageId);
+}
+
+void
+WebRenderCompositableHolder::UpdateExternalImages()
+{
+  for (auto iter = mCompositableHosts.Iter(); !iter.Done(); iter.Next()) {
+    RefPtr<CompositableHost>& host = iter.Data();
+    // XXX Change to correct TextrueSource handling here.
+    host->BindTextureSource();
+  }
+}
+
+} // namespace layers
+} // namespace mozilla

gfx/layers/wr/WebRenderCompositableHolder.h

@@ -0,0 +1,43 @@
+/* -*- Mode: C++; tab-width: 20; 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_GFX_WEBRENDERCOMPOSITABLE_HOLDER_H
+#define MOZILLA_GFX_WEBRENDERCOMPOSITABLE_HOLDER_H
+
+#include "nsDataHashtable.h"
+
+namespace mozilla {
+namespace layers {
+
+class CompositableHost;
+
+class WebRenderCompositableHolder final
+{
+public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WebRenderCompositableHolder)
+
+  explicit WebRenderCompositableHolder();
+
+protected:
+  virtual ~WebRenderCompositableHolder();
+
+public:
+
+  virtual void Destroy();
+
+  void AddExternalImageId(uint64_t aExternalImageId, CompositableHost* aHost);
+  void RemoveExternalImageId(uint64_t aExternalImageId);
+  void UpdateExternalImages();
+
+private:
+
+  // Holds CompositableHosts that are bound to external image ids.
+  nsDataHashtable<nsUint64HashKey, RefPtr<CompositableHost> > mCompositableHosts;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif /* MOZILLA_GFX_WEBRENDERCOMPOSITABLE_HOLDER_H */