content/browser/compositor/browser_compositor_view_mac.mm

   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.
   4
   5 #include "content/browser/compositor/browser_compositor_view_mac.h"
   6
   7 #include "base/debug/trace_event.h"
   8 #include "base/lazy_instance.h"
   9 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  10 #include "content/browser/compositor/browser_compositor_view_private_mac.h"
  11 #include "content/common/gpu/gpu_messages.h"
  12
  13 ////////////////////////////////////////////////////////////////////////////////
  14 // BrowserCompositorViewMac
  15
  16 namespace content {
  17 namespace {
  18
  19 // The number of placeholder objects allocated. If this reaches zero, then
  20 // the BrowserCompositorViewMacInternal being held on to for recycling,
  21 // |g_recyclable_internal_view|, will be freed.
  22 uint32 g_placeholder_count = 0;
  23
  24 // A spare BrowserCompositorViewMacInternal kept around for recycling.
  25 base::LazyInstance<scoped_ptr<BrowserCompositorViewMacInternal>>
  26   g_recyclable_internal_view;
  27
  28 }  // namespace
  29
  30 BrowserCompositorViewMac::BrowserCompositorViewMac(
  31     BrowserCompositorViewMacClient* client) : client_(client) {
  32   // Try to use the recyclable BrowserCompositorViewMacInternal if there is one,
  33   // otherwise allocate a new one.
  34   // TODO(ccameron): If there exists a frame in flight (swap has been called
  35   // by the compositor, but the frame has not arrived from the GPU process
  36   // yet), then that frame may inappropriately flash in the new view.
  37   internal_view_ = g_recyclable_internal_view.Get().Pass();
  38   if (!internal_view_)
  39     internal_view_.reset(new BrowserCompositorViewMacInternal);
  40   internal_view_->SetClient(client_);
  41 }
  42
  43 BrowserCompositorViewMac::~BrowserCompositorViewMac() {
  44   // Make this BrowserCompositorViewMacInternal recyclable for future instances.
  45   internal_view_->ResetClient();
  46   g_recyclable_internal_view.Get() = internal_view_.Pass();
  47
  48   // If there are no placeholders allocated, destroy the recyclable
  49   // BrowserCompositorViewMacInternal that we just populated.
  50   if (!g_placeholder_count)
  51     g_recyclable_internal_view.Get().reset();
  52 }
  53
  54 ui::Compositor* BrowserCompositorViewMac::GetCompositor() const {
  55   DCHECK(internal_view_);
  56   return internal_view_->compositor();
  57 }
  58
  59 bool BrowserCompositorViewMac::HasFrameOfSize(
  60     const gfx::Size& dip_size) const {
  61   if (internal_view_)
  62     return internal_view_->HasFrameOfSize(dip_size);
  63   return false;
  64 }
  65
  66 void BrowserCompositorViewMac::BeginPumpingFrames() {
  67   if (internal_view_)
  68     internal_view_->BeginPumpingFrames();
  69 }
  70
  71 void BrowserCompositorViewMac::EndPumpingFrames() {
  72   if (internal_view_)
  73     internal_view_->EndPumpingFrames();
  74 }
  75
  76 // static
  77 void BrowserCompositorViewMac::GotAcceleratedFrame(
  78     gfx::AcceleratedWidget widget,
  79     uint64 surface_handle, int surface_id,
  80     const std::vector<ui::LatencyInfo>& latency_info,
  81     gfx::Size pixel_size, float scale_factor,
  82     int gpu_host_id, int gpu_route_id) {
  83   BrowserCompositorViewMacInternal* internal_view =
  84       BrowserCompositorViewMacInternal::FromAcceleratedWidget(widget);
  85   int renderer_id = 0;
  86   if (internal_view) {
  87     internal_view->GotAcceleratedFrame(
  88         surface_handle, surface_id, latency_info, pixel_size, scale_factor);
  89     renderer_id = internal_view->GetRendererID();
  90   }
  91
  92   // Acknowledge the swap, now that it has been processed.
  93   AcceleratedSurfaceMsg_BufferPresented_Params ack_params;
  94   ack_params.sync_point = 0;
  95   ack_params.renderer_id = renderer_id;
  96   GpuProcessHostUIShim* ui_shim = GpuProcessHostUIShim::FromID(gpu_host_id);
  97   if (ui_shim) {
  98     ui_shim->Send(new AcceleratedSurfaceMsg_BufferPresented(
  99         gpu_route_id, ack_params));
 100   }
 101 }
 102
 103 // static
 104 void BrowserCompositorViewMac::GotSoftwareFrame(
 105     gfx::AcceleratedWidget widget,
 106     cc::SoftwareFrameData* frame_data, float scale_factor, SkCanvas* canvas) {
 107   BrowserCompositorViewMacInternal* internal_view =
 108       BrowserCompositorViewMacInternal::FromAcceleratedWidget(widget);
 109   if (internal_view)
 110     internal_view->GotSoftwareFrame(frame_data, scale_factor, canvas);
 111 }
 112
 113 ////////////////////////////////////////////////////////////////////////////////
 114 // BrowserCompositorViewPlaceholderMac
 115
 116 BrowserCompositorViewPlaceholderMac::BrowserCompositorViewPlaceholderMac() {
 117   g_placeholder_count += 1;
 118 }
 119
 120 BrowserCompositorViewPlaceholderMac::~BrowserCompositorViewPlaceholderMac() {
 121   DCHECK_GT(g_placeholder_count, 0u);
 122   g_placeholder_count -= 1;
 123
 124   // If there are no placeholders allocated, destroy the recyclable
 125   // BrowserCompositorViewMacInternal.
 126   if (!g_placeholder_count)
 127     g_recyclable_internal_view.Get().reset();
 128 }
 129
 130 }  // namespace content