cc/rate_limiter.cc

   1 // Copyright 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/rate_limiter.h"
   6
   7 #include "base/debug/trace_event.h"
   8 #include "cc/thread.h"
   9 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
  10
  11 namespace cc {
  12
  13 scoped_refptr<RateLimiter> RateLimiter::create(WebKit::WebGraphicsContext3D* context, RateLimiterClient *client, Thread* thread)
  14 {
  15     return make_scoped_refptr(new RateLimiter(context, client, thread));
  16 }
  17
  18 RateLimiter::RateLimiter(WebKit::WebGraphicsContext3D* context, RateLimiterClient *client, Thread* thread)
  19     : m_thread(thread)
  20     , m_context(context)
  21     , m_active(false)
  22     , m_client(client)
  23 {
  24     DCHECK(context);
  25 }
  26
  27 RateLimiter::~RateLimiter()
  28 {
  29 }
  30
  31 void RateLimiter::start()
  32 {
  33     if (m_active)
  34         return;
  35
  36     TRACE_EVENT0("cc", "RateLimiter::start");
  37     m_active = true;
  38     m_thread->postTask(base::Bind(&RateLimiter::rateLimitContext, this));
  39 }
  40
  41 void RateLimiter::stop()
  42 {
  43     TRACE_EVENT0("cc", "RateLimiter::stop");
  44     m_client = 0;
  45 }
  46
  47 void RateLimiter::rateLimitContext()
  48 {
  49     if (!m_client)
  50         return;
  51
  52     TRACE_EVENT0("cc", "RateLimiter::rateLimitContext");
  53
  54     m_active = false;
  55     m_client->rateLimit();
  56     m_context->rateLimitOffscreenContextCHROMIUM();
  57 }
  58
  59 }  // namespace cc