WIP - compositor worker mega patch.

third_party/WebKit/Source/web/CompositorMutatorImpl.cpp

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "web/CompositorMutatorImpl.h"
+
+#include "core/dom/CompositorProxy.h"
+#include "modules/compositorworker/CompositorWorkerThread.h"
+#include "platform/graphics/CompositorMutableStateProvider.h"
+#include "platform/graphics/CompositorMutatorClient.h"
+#include "platform/Task.h"
+#include "platform/TraceEvent.h"
+#include "platform/WebThreadSupportingGC.h"
+#include "public/platform/Platform.h"
+#include "public/platform/WebCompositorSupport.h"
+#include "public/platform/WebWaitableEvent.h"
+#include "web/CompositorProxyClientImpl.h"
+#include "wtf/Functional.h"
+
+namespace blink {
+
+CompositorMutatorImpl::CompositorMutatorImpl()
+    : m_client(adoptPtr(new CompositorMutatorClient(this)))
+{
+}
+
+CompositorMutatorImpl::~CompositorMutatorImpl()
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorImpl::~CompositorMutatorImpl");
+    // We must have torn down all compositor workers before destroying this
+    // instance.
+    ASSERT(m_clients.isEmpty());
+}
+
+PassOwnPtr<CompositorMutatorImpl> CompositorMutatorImpl::create()
+{
+    return adoptPtr(new CompositorMutatorImpl());
+}
+
+bool CompositorMutatorImpl::mutate(double timeNow, CompositorMutableStateProvider* stateProvider)
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorImpl::mutate");
+    Clients copy = m_clients;
+    bool needToReinvoke = false;
+    // TODO(vollick): we should avoid executing the animation frame
+    // callbacks if none of the proxies in the global scope are affected by
+    // m_mutations.
+    for (CompositorProxyClientImpl* client : copy) {
+        if (client->mutate(timeNow, stateProvider))
+            needToReinvoke = true;
+    }
+
+    return needToReinvoke;
+
+}
+
+void CompositorMutatorImpl::registerClient(CompositorProxyClientImpl* client)
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorImpl::registerClient");
+    m_clients.add(client);
+    setNeedsMutate();
+}
+
+void CompositorMutatorImpl::unregisterClient(CompositorProxyClientImpl* client)
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorImpl::unregisterClient");
+    m_clients.remove(client);
+}
+
+CompositorProxyClient* CompositorMutatorImpl::createCompositorProxyClient()
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorImpl::createCompositorProxyClient");
+    return new CompositorProxyClientImpl(this);
+}
+
+void CompositorMutatorImpl::setNeedsMutate()
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorImpl::requestMutation");
+    m_client->setNeedsMutate();
+}
+
+} // namespace blink