Web Animations CSS: Start running animations on the compositor

Source/core/animation/ActiveAnimations.cpp

Index: Source/core/animation/ActiveAnimations.cpp
diff --git a/Source/core/animation/ActiveAnimations.cpp b/Source/core/animation/ActiveAnimations.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..40294fb4643e6d09f4a42b849234f90563e11701
--- /dev/null
+++ b/Source/core/animation/ActiveAnimations.cpp
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2013 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "core/animation/ActiveAnimations.h"
+
+#include "core/frame/animation/AnimationController.h"
+#include "core/rendering/RenderObject.h"
+
+namespace WebCore {
+
+bool shouldCompositeForActiveAnimations(const RenderObject& renderer, bool renderViewInCompositingMode)
+{
+    ASSERT(RuntimeEnabledFeatures::webAnimationsCSSEnabled());
+
+    if (!renderer.node() || !renderer.node()->isElementNode())
+        return false;
+
+    const Element* element = toElement(renderer.node());
+    if (const ActiveAnimations* activeAnimations = element->activeAnimations()) {
+        // FIXME: remove compositing mode check once compositing is forced on all platforms
+        bool shouldCompositeForActiveAnimation = (activeAnimations->hasActiveAnimations(CSSPropertyOpacity) && renderViewInCompositingMode)
+            || activeAnimations->hasActiveAnimations(CSSPropertyWebkitTransform)
+            || activeAnimations->hasActiveAnimations(CSSPropertyWebkitFilter);
+        return shouldCompositeForActiveAnimation || activeAnimations->cssAnimations().shouldCompositeForPendingAnimations(renderViewInCompositingMode);
+    }
+
+    return false;
+}
+
+bool hasActiveAnimations(const RenderObject& renderer, CSSPropertyID property)
+{
+    ASSERT(RuntimeEnabledFeatures::webAnimationsCSSEnabled());
+
+    if (!renderer.node() || !renderer.node()->isElementNode())
+        return false;
+
+    const Element* element = toElement(renderer.node());
+    if (const ActiveAnimations* activeAnimations = element->activeAnimations())
+        return activeAnimations->hasActiveAnimations(property);
+
+    return false;
+}
+
+bool hasActiveAnimationsOnCompositor(const RenderObject& renderer, CSSPropertyID property)
+{
+    ASSERT(RuntimeEnabledFeatures::webAnimationsCSSEnabled());
+
+    if (!renderer.node() || !renderer.node()->isElementNode())
+        return false;
+
+    const Element* element = toElement(renderer.node());
+    if (const ActiveAnimations* activeAnimations = element->activeAnimations())
+        return activeAnimations->hasActiveAnimationsOnCompositor(property);
+
+    return false;
+}
+
+bool ActiveAnimations::hasActiveAnimations(CSSPropertyID property) const
+{
+    return m_defaultStack.affects(property);
+}
+
+bool ActiveAnimations::hasActiveAnimationsOnCompositor(CSSPropertyID property) const
+{
+    return m_defaultStack.hasActiveAnimationsOnCompositor(property);
+}
+
+void ActiveAnimations::cancelAnimationOnCompositor()
+{
+    for (PlayerSet::iterator it = m_players.begin(); it != players().end(); ++it)
+        it->key->cancelAnimationOnCompositor();
+}
+
+} // namespace WebCore