cc/surfaces/surface.cc

   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 "cc/surfaces/surface.h"
   6
   7 #include "cc/output/compositor_frame.h"
   8 #include "cc/output/copy_output_request.h"
   9 #include "cc/surfaces/surface_factory.h"
  10 #include "cc/surfaces/surface_manager.h"
  11
  12 namespace cc {
  13
  14 // The frame index starts at 2 so that empty frames will be treated as
  15 // completely damaged the first time they're drawn from.
  16 static const int kFrameIndexStart = 2;
  17
  18 Surface::Surface(SurfaceId id, const gfx::Size& size, SurfaceFactory* factory)
  19     : surface_id_(id),
  20       size_(size),
  21       factory_(factory->AsWeakPtr()),
  22       frame_index_(kFrameIndexStart) {
  23 }
  24
  25 Surface::~Surface() {
  26   ClearCopyRequests();
  27   if (current_frame_ && factory_) {
  28     ReturnedResourceArray current_resources;
  29     TransferableResource::ReturnResources(
  30         current_frame_->delegated_frame_data->resource_list,
  31         &current_resources);
  32     factory_->UnrefResources(current_resources);
  33   }
  34 }
  35
  36 void Surface::QueueFrame(scoped_ptr<CompositorFrame> frame,
  37                          const base::Closure& callback) {
  38   DCHECK(factory_);
  39   ClearCopyRequests();
  40   TakeLatencyInfo(&frame->metadata.latency_info);
  41   scoped_ptr<CompositorFrame> previous_frame = current_frame_.Pass();
  42   current_frame_ = frame.Pass();
  43   factory_->ReceiveFromChild(
  44       current_frame_->delegated_frame_data->resource_list);
  45   ++frame_index_;
  46
  47   if (previous_frame) {
  48     ReturnedResourceArray previous_resources;
  49     TransferableResource::ReturnResources(
  50         previous_frame->delegated_frame_data->resource_list,
  51         &previous_resources);
  52     factory_->UnrefResources(previous_resources);
  53   }
  54   if (!draw_callback_.is_null())
  55     draw_callback_.Run();
  56   draw_callback_ = callback;
  57   factory_->manager()->DidSatisfySequences(
  58       surface_id_, &current_frame_->metadata.satisfies_sequences);
  59 }
  60
  61 void Surface::RequestCopyOfOutput(scoped_ptr<CopyOutputRequest> copy_request) {
  62   if (current_frame_ &&
  63       !current_frame_->delegated_frame_data->render_pass_list.empty())
  64     current_frame_->delegated_frame_data->render_pass_list.back()
  65         ->copy_requests.push_back(copy_request.Pass());
  66   else
  67     copy_request->SendEmptyResult();
  68 }
  69
  70 void Surface::TakeCopyOutputRequests(
  71     std::multimap<RenderPassId, CopyOutputRequest*>* copy_requests) {
  72   DCHECK(copy_requests->empty());
  73   if (current_frame_) {
  74     for (auto* render_pass :
  75          current_frame_->delegated_frame_data->render_pass_list) {
  76       while (!render_pass->copy_requests.empty()) {
  77         scoped_ptr<CopyOutputRequest> request =
  78             render_pass->copy_requests.take_back();
  79         render_pass->copy_requests.pop_back();
  80         copy_requests->insert(
  81             std::make_pair(render_pass->id, request.release()));
  82       }
  83     }
  84   }
  85 }
  86
  87 const CompositorFrame* Surface::GetEligibleFrame() {
  88   return current_frame_.get();
  89 }
  90
  91 void Surface::TakeLatencyInfo(std::vector<ui::LatencyInfo>* latency_info) {
  92   if (!current_frame_)
  93     return;
  94   if (latency_info->empty()) {
  95     current_frame_->metadata.latency_info.swap(*latency_info);
  96     return;
  97   }
  98   std::copy(current_frame_->metadata.latency_info.begin(),
  99             current_frame_->metadata.latency_info.end(),
 100             std::back_inserter(*latency_info));
 101   current_frame_->metadata.latency_info.clear();
 102 }
 103
 104 void Surface::RunDrawCallbacks() {
 105   if (!draw_callback_.is_null()) {
 106     base::Closure callback = draw_callback_;
 107     draw_callback_ = base::Closure();
 108     callback.Run();
 109   }
 110 }
 111
 112 void Surface::ClearCopyRequests() {
 113   if (current_frame_) {
 114     for (auto* render_pass :
 115          current_frame_->delegated_frame_data->render_pass_list) {
 116       for (auto* copy_request : render_pass->copy_requests)
 117         copy_request->SendEmptyResult();
 118     }
 119   }
 120 }
 121
 122 }  // namespace cc