compositor-worker: blink->cc plumbing

third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.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 "platform/graphics/CompositorMutatorClient.h"
+
+#include "cc/animation/mutable_properties.h"
+#include "platform/TraceEvent.h"
+#include "platform/graphics/CompositorMutableProperties.h"
+#include "platform/graphics/CompositorMutableStateProvider.h"
+#include "platform/graphics/CompositorMutation.h"
+#include "platform/graphics/CompositorMutator.h"
+#include "public/platform/WebCompositorMutations.h"
+
+namespace blink {
+
+CompositorMutatorClient::CompositorMutatorClient(CompositorMutator* mutator)
+    : m_client(nullptr)
+    , m_mutator(mutator)
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorClient::CompositorMutatorClient");
+}
+
+CompositorMutatorClient::~CompositorMutatorClient()
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorClient::~CompositorMutatorClient");
+}
+
+bool CompositorMutatorClient::Mutate(
+    base::TimeTicks now,
+    cc::LayerTreeImpl* state)
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorClient::GetMutations");
+    double time = (now - base::TimeTicks()).InSecondsF();
+    if (!m_mutations)
+        m_mutations = adoptPtr(new CompositorMutations);
+    CompositorMutableStateProvider compositorState(state, m_mutations.get());
+    bool shouldReinvoke = m_mutator->mutate(time, &compositorState);
+    return shouldReinvoke;
+}
+
+void CompositorMutatorClient::SetClient(cc::LayerTreeMutatorClient* client)
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorClient::SetClient");
+    m_client = client;
+    setNeedsMutate();
+}
+
+scoped_ptr<cc::LayerTreeMutations> CompositorMutatorClient::TakeMutations()
+{
+    return make_scoped_ptr<cc::LayerTreeMutations>(m_mutations.leakPtr());
+}
+
+void CompositorMutatorClient::setNeedsMutate()
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorClient::requestMutation");
+    m_client->SetNeedsMutate();
+}
+
+} // namespace blink