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1 // Copyright 2011 The Chromium Authors. All rights reserved. | 1 // Copyright 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef RateLimiter_h | 5 // Temporary forwarding header |
6 #define RateLimiter_h | 6 #include "cc/rate_limiter.h" |
7 | |
8 #if USE(ACCELERATED_COMPOSITING) | |
9 | |
10 #include "base/memory/ref_counted.h" | |
11 | |
12 namespace WebKit { | |
13 class WebGraphicsContext3D; | |
14 } | |
15 | |
16 namespace cc { | |
17 | |
18 class RateLimiterClient { | |
19 public: | |
20 virtual void rateLimit() = 0; | |
21 }; | |
22 | |
23 // A RateLimiter can be used to make sure that a single context does not dominat
e all execution time. | |
24 // To use, construct a RateLimiter class around the context and call start() whe
never calls are made on the | |
25 // context outside of normal flow control. RateLimiter will block if the context
is too far ahead of the | |
26 // compositor. | |
27 class RateLimiter : public base::RefCounted<RateLimiter> { | |
28 public: | |
29 static scoped_refptr<RateLimiter> create(WebKit::WebGraphicsContext3D*, Rate
LimiterClient*); | |
30 | |
31 void start(); | |
32 | |
33 // Context and client will not be accessed after stop(). | |
34 void stop(); | |
35 | |
36 private: | |
37 RateLimiter(WebKit::WebGraphicsContext3D*, RateLimiterClient*); | |
38 ~RateLimiter(); | |
39 friend class base::RefCounted<RateLimiter>; | |
40 | |
41 class Task; | |
42 friend class Task; | |
43 void rateLimitContext(); | |
44 | |
45 WebKit::WebGraphicsContext3D* m_context; | |
46 bool m_active; | |
47 RateLimiterClient *m_client; | |
48 }; | |
49 | |
50 } | |
51 #endif // USE(ACCELERATED_COMPOSITING) | |
52 | |
53 #endif | |
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