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 <algorithm>
   8
   9 #include "cc/output/compositor_frame.h"
  10 #include "cc/output/copy_output_request.h"
  11 #include "cc/surfaces/surface_factory.h"
  12 #include "cc/surfaces/surface_manager.h"
  13
  14 namespace cc {
  15
  16 // The frame index starts at 2 so that empty frames will be treated as
  17 // completely damaged the first time they're drawn from.
  18 static const int kFrameIndexStart = 2;
  19
  20 Surface::Surface(SurfaceId id, const gfx::Size& size, SurfaceFactory* factory)
  21     : surface_id_(id),
  22       size_(size),
  23       factory_(factory->AsWeakPtr()),
  24       frame_index_(kFrameIndexStart) {
  25 }
  26
  27 Surface::~Surface() {
  28   ClearCopyRequests();
  29   if (current_frame_ && factory_) {
  30     ReturnedResourceArray current_resources;
  31     TransferableResource::ReturnResources(
  32         current_frame_->delegated_frame_data->resource_list,
  33         &current_resources);
  34     factory_->UnrefResources(current_resources);
  35   }
  36 }
  37
  38 void Surface::QueueFrame(scoped_ptr<CompositorFrame> frame,
  39                          const base::Closure& callback) {
  40   DCHECK(factory_);
  41   ClearCopyRequests();
  42   TakeLatencyInfo(&frame->metadata.latency_info);
  43   scoped_ptr<CompositorFrame> previous_frame = current_frame_.Pass();
  44   current_frame_ = frame.Pass();
  45   factory_->ReceiveFromChild(
  46       current_frame_->delegated_frame_data->resource_list);
  47   ++frame_index_;
  48
  49   if (previous_frame) {
  50     ReturnedResourceArray previous_resources;
  51     TransferableResource::ReturnResources(
  52         previous_frame->delegated_frame_data->resource_list,
  53         &previous_resources);
  54     factory_->UnrefResources(previous_resources);
  55   }
  56   if (!draw_callback_.is_null())
  57     draw_callback_.Run();
  58   draw_callback_ = callback;
  59   factory_->manager()->DidSatisfySequences(
  60       surface_id_, &current_frame_->metadata.satisfies_sequences);
  61 }
  62
  63 void Surface::RequestCopyOfOutput(scoped_ptr<CopyOutputRequest> copy_request) {
  64   if (current_frame_ &&
  65       !current_frame_->delegated_frame_data->render_pass_list.empty())
  66     current_frame_->delegated_frame_data->render_pass_list.back()
  67         ->copy_requests.push_back(copy_request.Pass());
  68   else
  69     copy_request->SendEmptyResult();
  70 }
  71
  72 void Surface::TakeCopyOutputRequests(
  73     std::multimap<RenderPassId, CopyOutputRequest*>* copy_requests) {
  74   DCHECK(copy_requests->empty());
  75   if (current_frame_) {
  76     for (const auto& render_pass :
  77          current_frame_->delegated_frame_data->render_pass_list) {
  78       while (!render_pass->copy_requests.empty()) {
  79         scoped_ptr<CopyOutputRequest> request =
  80             render_pass->copy_requests.take_back();
  81         render_pass->copy_requests.pop_back();
  82         copy_requests->insert(
  83             std::make_pair(render_pass->id, request.release()));
  84       }
  85     }
  86   }
  87 }
  88
  89 const CompositorFrame* Surface::GetEligibleFrame() {
  90   return current_frame_.get();
  91 }
  92
  93 void Surface::TakeLatencyInfo(std::vector<ui::LatencyInfo>* latency_info) {
  94   if (!current_frame_)
  95     return;
  96   if (latency_info->empty()) {
  97     current_frame_->metadata.latency_info.swap(*latency_info);
  98     return;
  99   }
 100   std::copy(current_frame_->metadata.latency_info.begin(),
 101             current_frame_->metadata.latency_info.end(),
 102             std::back_inserter(*latency_info));
 103   current_frame_->metadata.latency_info.clear();
 104 }
 105
 106 void Surface::RunDrawCallbacks() {
 107   if (!draw_callback_.is_null()) {
 108     base::Closure callback = draw_callback_;
 109     draw_callback_ = base::Closure();
 110     callback.Run();
 111   }
 112 }
 113
 114 void Surface::ClearCopyRequests() {
 115   if (current_frame_) {
 116     for (const auto& render_pass :
 117          current_frame_->delegated_frame_data->render_pass_list) {
 118       for (const auto& copy_request : render_pass->copy_requests)
 119         copy_request->SendEmptyResult();
 120     }
 121   }
 122 }
 123
 124 }  // namespace cc