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Side by Side Diff: content/browser/renderer_host/backing_store_manager.cc

Issue 9600036: Move Render(View|Widget)Host and associated classes to content namespace. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Respond to review comments. Created 8 years, 9 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 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 #include "content/browser/renderer_host/backing_store_manager.h" 5 #include "content/browser/renderer_host/backing_store_manager.h"
6 6
7 #include "base/bind.h" 7 #include "base/bind.h"
8 #include "base/command_line.h" 8 #include "base/command_line.h"
9 #include "base/memory/mru_cache.h" 9 #include "base/memory/mru_cache.h"
10 #include "base/sys_info.h" 10 #include "base/sys_info.h"
11 #include "content/browser/renderer_host/backing_store.h" 11 #include "content/browser/renderer_host/backing_store.h"
12 #include "content/browser/renderer_host/render_widget_host_impl.h" 12 #include "content/browser/renderer_host/render_widget_host_impl.h"
13 #include "content/public/common/content_switches.h" 13 #include "content/public/common/content_switches.h"
14 14
15 using content::RenderWidgetHost;
16
15 namespace { 17 namespace {
16 18
17 // There are two separate caches, |large_cache| and |small_cache|. large_cache 19 // There are two separate caches, |large_cache| and |small_cache|. large_cache
18 // is meant for large items (tabs, popup windows), while small_cache is meant 20 // is meant for large items (tabs, popup windows), while small_cache is meant
19 // for small items (extension popups, HTML5 notifications). The idea is that 21 // for small items (extension popups, HTML5 notifications). The idea is that
20 // we'll almost always try to evict from large_cache first since small_cache 22 // we'll almost always try to evict from large_cache first since small_cache
21 // items will tend to be visible more of the time. 23 // items will tend to be visible more of the time.
22 typedef base::OwningMRUCache<RenderWidgetHost*, BackingStore*> 24 typedef base::OwningMRUCache<RenderWidgetHost*, BackingStore*>
23 BackingStoreCache; 25 BackingStoreCache;
24 static BackingStoreCache* large_cache = NULL; 26 static BackingStoreCache* large_cache = NULL;
(...skipping 113 matching lines...) Expand 10 before | Expand all | Expand 10 after
138 // Limit the number of large backing stores (tabs) to the memory tier number 140 // Limit the number of large backing stores (tabs) to the memory tier number
139 // (between 2-5). While we allow a larger amount of memory for people who 141 // (between 2-5). While we allow a larger amount of memory for people who
140 // have large windows, this means that those who use small browser windows 142 // have large windows, this means that those who use small browser windows
141 // won't ever cache more than 5 tabs, so they pay a smaller memory cost. 143 // won't ever cache more than 5 tabs, so they pay a smaller memory cost.
142 if (large_cache->size() >= MaxNumberOfBackingStores()) 144 if (large_cache->size() >= MaxNumberOfBackingStores())
143 ExpireLastBackingStore(large_cache); 145 ExpireLastBackingStore(large_cache);
144 cache = large_cache; 146 cache = large_cache;
145 } else { 147 } else {
146 cache = small_cache; 148 cache = small_cache;
147 } 149 }
148 BackingStore* backing_store = 150 BackingStore* backing_store = content::RenderWidgetHostImpl::From(
149 RenderWidgetHostImpl::From(host)->AllocBackingStore(backing_store_size); 151 host)->AllocBackingStore(backing_store_size);
150 if (backing_store) 152 if (backing_store)
151 cache->Put(host, backing_store); 153 cache->Put(host, backing_store);
152 return backing_store; 154 return backing_store;
153 } 155 }
154 156
155 int ComputeTotalArea(const std::vector<gfx::Rect>& rects) { 157 int ComputeTotalArea(const std::vector<gfx::Rect>& rects) {
156 // We assume that the given rects are non-overlapping, which is a property of 158 // We assume that the given rects are non-overlapping, which is a property of
157 // the paint rects generated by the PaintAggregator. 159 // the paint rects generated by the PaintAggregator.
158 #ifndef NDEBUG 160 #ifndef NDEBUG
159 for (size_t i = 0; i < rects.size(); ++i) { 161 for (size_t i = 0; i < rects.size(); ++i) {
(...skipping 109 matching lines...) Expand 10 before | Expand all | Expand 10 after
269 size_t mem = 0; 271 size_t mem = 0;
270 BackingStoreCache::iterator it; 272 BackingStoreCache::iterator it;
271 for (it = large_cache->begin(); it != large_cache->end(); ++it) 273 for (it = large_cache->begin(); it != large_cache->end(); ++it)
272 mem += it->second->MemorySize(); 274 mem += it->second->MemorySize();
273 275
274 for (it = small_cache->begin(); it != small_cache->end(); ++it) 276 for (it = small_cache->begin(); it != small_cache->end(); ++it)
275 mem += it->second->MemorySize(); 277 mem += it->second->MemorySize();
276 278
277 return mem; 279 return mem;
278 } 280 }
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