2 * Copyright (C) 2011 Google Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #if USE(ACCELERATED_COMPOSITING)
30 #include "RateLimiter.h"
32 #include "Extensions3DChromium.h"
33 #include "GraphicsContext3D.h"
34 #include "TraceEvent.h"
38 PassRefPtr<RateLimiter> RateLimiter::create(GraphicsContext3D* context)
40 return adoptRef(new RateLimiter(context));
43 RateLimiter::RateLimiter(GraphicsContext3D* context)
45 , m_timer(this, &RateLimiter::rateLimitContext)
48 ASSERT(context->getExtensions());
49 m_contextSupportsRateLimitingExtension = context->getExtensions()->supports("GL_CHROMIUM_rate_limit_offscreen_context");
52 void RateLimiter::start()
54 if (m_contextSupportsRateLimitingExtension && !m_timer.isActive())
55 m_timer.startOneShot(0);
58 void RateLimiter::stop()
63 void RateLimiter::rateLimitContext(Timer<RateLimiter>*)
65 TRACE_EVENT("RateLimiter::rateLimitContext", this, 0);
67 Extensions3DChromium* extensions = static_cast<Extensions3DChromium*>(m_context->getExtensions());
69 extensions->rateLimitOffscreenContextCHROMIUM();
73 #endif // USE(ACCELERATED_COMPOSITING)