1 // Copyright 2014 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.
5 #include "content/browser/compositor/browser_compositor_view_mac.h"
7 #include "base/lazy_instance.h"
8 #include "base/trace_event/trace_event.h"
9 #include "content/browser/compositor/image_transport_factory.h"
10 #include "content/browser/gpu/gpu_data_manager_impl.h"
11 #include "content/browser/renderer_host/render_widget_resize_helper.h"
12 #include "content/public/browser/context_factory.h"
13 #include "gpu/config/gpu_driver_bug_workaround_type.h"
14 #include "ui/accelerated_widget_mac/accelerated_widget_mac.h"
16 ////////////////////////////////////////////////////////////////////////////////
17 // BrowserCompositorMac
23 // Set when no browser compositors should remain alive.
24 bool g_has_shut_down = false;
26 // The number of placeholder objects allocated. If this reaches zero, then
27 // the BrowserCompositorMac being held on to for recycling,
28 // |g_recyclable_browser_compositor|, will be freed.
29 uint32 g_placeholder_count = 0;
31 // A spare BrowserCompositorMac kept around for recycling.
32 base::LazyInstance<scoped_ptr<BrowserCompositorMac>>
33 g_recyclable_browser_compositor;
35 bool WidgetNeedsGLFinishWorkaround() {
36 return GpuDataManagerImpl::GetInstance()->IsDriverBugWorkaroundActive(
37 gpu::FORCE_GL_FINISH_AFTER_COMPOSITING);
42 BrowserCompositorMac::BrowserCompositorMac()
43 : accelerated_widget_mac_(
44 new ui::AcceleratedWidgetMac(WidgetNeedsGLFinishWorkaround())),
46 accelerated_widget_mac_->accelerated_widget(),
47 content::GetContextFactory(),
48 RenderWidgetResizeHelper::Get()->task_runner()) {
49 compositor_.SetLocksWillTimeOut(false);
53 BrowserCompositorMac::~BrowserCompositorMac() {}
55 void BrowserCompositorMac::Suspend() {
56 compositor_suspended_lock_ = compositor_.GetCompositorLock();
59 void BrowserCompositorMac::Unsuspend() {
60 compositor_suspended_lock_ = nullptr;
64 scoped_ptr<BrowserCompositorMac> BrowserCompositorMac::Create() {
65 if (g_recyclable_browser_compositor.Get())
66 return g_recyclable_browser_compositor.Get().Pass();
67 return scoped_ptr<BrowserCompositorMac>(new BrowserCompositorMac).Pass();
71 void BrowserCompositorMac::Recycle(
72 scoped_ptr<BrowserCompositorMac> compositor) {
74 content::ImageTransportFactory::GetInstance()->OnCompositorRecycled(
75 compositor->compositor());
77 // It is an error to have a browser compositor continue to exist after
79 CHECK(!g_has_shut_down);
81 // Make this BrowserCompositorMac recyclable for future instances.
82 g_recyclable_browser_compositor.Get().swap(compositor);
84 // If there are no placeholders allocated, destroy the recyclable
85 // BrowserCompositorMac that we just populated.
86 if (!g_placeholder_count)
87 g_recyclable_browser_compositor.Get().reset();
91 void BrowserCompositorMac::DisableRecyclingForShutdown() {
92 g_has_shut_down = true;
93 g_recyclable_browser_compositor.Get().reset();
96 ////////////////////////////////////////////////////////////////////////////////
97 // BrowserCompositorMacPlaceholder
99 BrowserCompositorMacPlaceholder::BrowserCompositorMacPlaceholder() {
100 g_placeholder_count += 1;
103 BrowserCompositorMacPlaceholder::~BrowserCompositorMacPlaceholder() {
104 DCHECK_GT(g_placeholder_count, 0u);
105 g_placeholder_count -= 1;
107 // If there are no placeholders allocated, destroy the recyclable
108 // BrowserCompositorMac.
109 if (!g_placeholder_count)
110 g_recyclable_browser_compositor.Get().reset();
113 } // namespace content