1 files changed, 87 insertions, 0 deletions
diff --git a/cc/rate_limiter.cc b/cc/rate_limiter.cc
new file mode 100644
index 0000000..a521525
--- /dev/null
+++ b/cc/rate_limiter.cc
@@ -0,0 +1,87 @@
+// Copyright 2011 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"
+
+#if USE(ACCELERATED_COMPOSITING)
+#include "RateLimiter.h"
+
+#include "CCProxy.h"
+#include "CCThread.h"
+#include "TraceEvent.h"
+#include <public/WebGraphicsContext3D.h>
+#include <wtf/RefPtr.h>
+
+namespace cc {
+
+class RateLimiter::Task : public CCThread::Task {
+public:
+    static PassOwnPtr<Task> create(RateLimiter* rateLimiter)
+    {
+        return adoptPtr(new Task(rateLimiter));
+    }
+    virtual ~Task() { }
+
+private:
+    explicit Task(RateLimiter* rateLimiter)
+        : CCThread::Task(this)
+        , m_rateLimiter(rateLimiter)
+    {
+    }
+
+    virtual void performTask() OVERRIDE
+    {
+        m_rateLimiter->rateLimitContext();
+    }
+
+    scoped_refptr<RateLimiter> m_rateLimiter;
+};
+
+scoped_refptr<RateLimiter> RateLimiter::create(WebKit::WebGraphicsContext3D* context, RateLimiterClient *client)
+{
+    return make_scoped_refptr(new RateLimiter(context, client));
+}
+
+RateLimiter::RateLimiter(WebKit::WebGraphicsContext3D* context, RateLimiterClient *client)
+    : m_context(context)
+    , m_active(false)
+    , m_client(client)
+{
+    ASSERT(context);
+}
+
+RateLimiter::~RateLimiter()
+{
+}
+
+void RateLimiter::start()
+{
+    if (m_active)
+        return;
+
+    TRACE_EVENT0("cc", "RateLimiter::start");
+    m_active = true;
+    CCProxy::mainThread()->postTask(RateLimiter::Task::create(this));
+}
+
+void RateLimiter::stop()
+{
+    TRACE_EVENT0("cc", "RateLimiter::stop");
+    m_client = 0;
+}
+
+void RateLimiter::rateLimitContext()
+{
+    if (!m_client)
+        return;
+
+    TRACE_EVENT0("cc", "RateLimiter::rateLimitContext");
+
+    m_active = false;
+    m_client->rateLimit();
+    m_context->rateLimitOffscreenContextCHROMIUM();
+}
+
+}
+#endif // USE(ACCELERATED_COMPOSITING)