compositor-worker: plumb element id and mutable properties

third_party/WebKit/Source/core/dom/CompositorProxiedPropertySet.cpp

+// Copyright 2015 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 "config.h"
+#include "core/dom/CompositorProxiedPropertySet.h"
+
+namespace blink {
+
+PassOwnPtrWillBeRawPtr<CompositorProxiedPropertySet> CompositorProxiedPropertySet::create()
+{
+    return adoptPtrWillBeNoop(new CompositorProxiedPropertySet);
+}
+
+CompositorProxiedPropertySet::CompositorProxiedPropertySet()
+{
+    memset(m_counts, 0, sizeof(m_counts));
+}
+
+CompositorProxiedPropertySet::~CompositorProxiedPropertySet() {}
+
+bool CompositorProxiedPropertySet::isEmpty() const
+{
+    return !proxiedProperties();
+}
+
+void CompositorProxiedPropertySet::increment(uint32_t mutableProperties)
+{
+    for (int i = 0; i < kNumWebCompositorMutableProperties; ++i) {
+        if (mutableProperties & (1 << i))
+            ++m_counts[i];
+    }
+}
+
+void CompositorProxiedPropertySet::decrement(uint32_t mutableProperties)
+{
+    for (int i = 0; i < kNumWebCompositorMutableProperties; ++i) {
+        if (mutableProperties & (1 << i)) {
+            ASSERT(m_counts[i]);
+            --m_counts[i];
+        }
+    }
+}
+
+uint32_t CompositorProxiedPropertySet::proxiedProperties() const
+{
+    uint32_t properties = WebCompositorMutablePropertyNone;
+    for (int i = 0; i < kNumWebCompositorMutableProperties; ++i) {
+        if (m_counts[i])
+            properties |= 1 << i;
+    }
+    return properties;
+}
+
+} // namespace blink