Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(677)

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

Issue 10804031: Move more files into the content namespace. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: Created 8 years, 5 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch | Annotate | Revision Log
OLDNEW
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; 15 namespace content {
16
17 namespace { 16 namespace {
18 17
19 // There are two separate caches, |large_cache| and |small_cache|. large_cache 18 // There are two separate caches, |large_cache| and |small_cache|. large_cache
20 // is meant for large items (tabs, popup windows), while small_cache is meant 19 // is meant for large items (tabs, popup windows), while small_cache is meant
21 // for small items (extension popups, HTML5 notifications). The idea is that 20 // for small items (extension popups, HTML5 notifications). The idea is that
22 // we'll almost always try to evict from large_cache first since small_cache 21 // we'll almost always try to evict from large_cache first since small_cache
23 // items will tend to be visible more of the time. 22 // items will tend to be visible more of the time.
24 typedef base::OwningMRUCache<RenderWidgetHost*, BackingStore*> 23 typedef base::OwningMRUCache<RenderWidgetHost*, BackingStore*>
25 BackingStoreCache; 24 BackingStoreCache;
26 static BackingStoreCache* large_cache = NULL; 25 BackingStoreCache* large_cache = NULL;
27 static BackingStoreCache* small_cache = NULL; 26 BackingStoreCache* small_cache = NULL;
28 27
29 // Threshold is based on a single large-monitor-width toolstrip. 28 // Threshold is based on a single large-monitor-width toolstrip.
30 // (32bpp, 32 pixels high, 1920 pixels wide) 29 // (32bpp, 32 pixels high, 1920 pixels wide)
31 // TODO(aa): The extension system no longer supports toolstrips, but we think 30 // TODO(aa): The extension system no longer supports toolstrips, but we think
32 // this might be helping for other examples of small HTML views in Chrome. 31 // this might be helping for other examples of small HTML views in Chrome.
33 // Maybe this cache should be redesigned to simply prefer smaller objects to 32 // Maybe this cache should be redesigned to simply prefer smaller objects to
34 // larger ones, rather than having a fixed threshold. 33 // larger ones, rather than having a fixed threshold.
35 // For more background, see: crbug.com/100506. 34 // For more background, see: crbug.com/100506.
36 const size_t kSmallThreshold = 4 * 32 * 1920; 35 const size_t kSmallThreshold = 4 * 32 * 1920;
37 36
(...skipping 102 matching lines...) Expand 10 before | Expand all | Expand 10 after
140 // Limit the number of large backing stores (tabs) to the memory tier number 139 // Limit the number of large backing stores (tabs) to the memory tier number
141 // (between 2-5). While we allow a larger amount of memory for people who 140 // (between 2-5). While we allow a larger amount of memory for people who
142 // have large windows, this means that those who use small browser windows 141 // have large windows, this means that those who use small browser windows
143 // won't ever cache more than 5 tabs, so they pay a smaller memory cost. 142 // won't ever cache more than 5 tabs, so they pay a smaller memory cost.
144 if (large_cache->size() >= MaxNumberOfBackingStores()) 143 if (large_cache->size() >= MaxNumberOfBackingStores())
145 ExpireLastBackingStore(large_cache); 144 ExpireLastBackingStore(large_cache);
146 cache = large_cache; 145 cache = large_cache;
147 } else { 146 } else {
148 cache = small_cache; 147 cache = small_cache;
149 } 148 }
150 BackingStore* backing_store = content::RenderWidgetHostImpl::From( 149 BackingStore* backing_store = RenderWidgetHostImpl::From(
151 host)->AllocBackingStore(backing_store_size); 150 host)->AllocBackingStore(backing_store_size);
152 if (backing_store) 151 if (backing_store)
153 cache->Put(host, backing_store); 152 cache->Put(host, backing_store);
154 return backing_store; 153 return backing_store;
155 } 154 }
156 155
157 int ComputeTotalArea(const std::vector<gfx::Rect>& rects) { 156 int ComputeTotalArea(const std::vector<gfx::Rect>& rects) {
158 // We assume that the given rects are non-overlapping, which is a property of 157 // We assume that the given rects are non-overlapping, which is a property of
159 // the paint rects generated by the PaintAggregator. 158 // the paint rects generated by the PaintAggregator.
160 #ifndef NDEBUG 159 #ifndef NDEBUG
(...skipping 111 matching lines...) Expand 10 before | Expand all | Expand 10 after
272 size_t mem = 0; 271 size_t mem = 0;
273 BackingStoreCache::iterator it; 272 BackingStoreCache::iterator it;
274 for (it = large_cache->begin(); it != large_cache->end(); ++it) 273 for (it = large_cache->begin(); it != large_cache->end(); ++it)
275 mem += it->second->MemorySize(); 274 mem += it->second->MemorySize();
276 275
277 for (it = small_cache->begin(); it != small_cache->end(); ++it) 276 for (it = small_cache->begin(); it != small_cache->end(); ++it)
278 mem += it->second->MemorySize(); 277 mem += it->second->MemorySize();
279 278
280 return mem; 279 return mem;
281 } 280 }
281
282 } // namespace content
OLDNEW
« no previous file with comments | « content/browser/renderer_host/backing_store_manager.h ('k') | content/browser/renderer_host/backing_store_win.h » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698