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_id_allocator.h"
  13 #include "cc/surfaces/surface_manager.h"
  14
  15 namespace cc {
  16
  17 // The frame index starts at 2 so that empty frames will be treated as
  18 // completely damaged the first time they're drawn from.
  19 static const int kFrameIndexStart = 2;
  20
  21 Surface::Surface(SurfaceId id, const gfx::Size& size, SurfaceFactory* factory)
  22     : surface_id_(id),
  23       size_(size),
  24       factory_(factory->AsWeakPtr()),
  25       frame_index_(kFrameIndexStart) {
  26 }
  27
  28 Surface::~Surface() {
  29   ClearCopyRequests();
  30   if (current_frame_ && factory_) {
  31     ReturnedResourceArray current_resources;
  32     TransferableResource::ReturnResources(
  33         current_frame_->delegated_frame_data->resource_list,
  34         &current_resources);
  35     factory_->UnrefResources(current_resources);
  36   }
  37 }
  38
  39 void Surface::QueueFrame(scoped_ptr<CompositorFrame> frame,
  40                          const base::Closure& callback) {
  41   DCHECK(factory_);
  42   ClearCopyRequests();
  43   TakeLatencyInfo(&frame->metadata.latency_info);
  44   scoped_ptr<CompositorFrame> previous_frame = current_frame_.Pass();
  45   current_frame_ = frame.Pass();
  46   factory_->ReceiveFromChild(
  47       current_frame_->delegated_frame_data->resource_list);
  48   ++frame_index_;
  49
  50   if (previous_frame) {
  51     ReturnedResourceArray previous_resources;
  52     TransferableResource::ReturnResources(
  53         previous_frame->delegated_frame_data->resource_list,
  54         &previous_resources);
  55     factory_->UnrefResources(previous_resources);
  56   }
  57   if (!draw_callback_.is_null())
  58     draw_callback_.Run();
  59   draw_callback_ = callback;
  60   factory_->manager()->DidSatisfySequences(
  61       SurfaceIdAllocator::NamespaceForId(surface_id_),
  62       &current_frame_->metadata.satisfies_sequences);
  63 }
  64
  65 void Surface::RequestCopyOfOutput(scoped_ptr<CopyOutputRequest> copy_request) {
  66   if (current_frame_ &&
  67       !current_frame_->delegated_frame_data->render_pass_list.empty())
  68     current_frame_->delegated_frame_data->render_pass_list.back()
  69         ->copy_requests.push_back(copy_request.Pass());
  70   else
  71     copy_request->SendEmptyResult();
  72 }
  73
  74 void Surface::TakeCopyOutputRequests(
  75     std::multimap<RenderPassId, CopyOutputRequest*>* copy_requests) {
  76   DCHECK(copy_requests->empty());
  77   if (current_frame_) {
  78     for (const auto& render_pass :
  79          current_frame_->delegated_frame_data->render_pass_list) {
  80       while (!render_pass->copy_requests.empty()) {
  81         scoped_ptr<CopyOutputRequest> request =
  82             render_pass->copy_requests.take_back();
  83         render_pass->copy_requests.pop_back();
  84         copy_requests->insert(
  85             std::make_pair(render_pass->id, request.release()));
  86       }
  87     }
  88   }
  89 }
  90
  91 const CompositorFrame* Surface::GetEligibleFrame() {
  92   return current_frame_.get();
  93 }
  94
  95 void Surface::TakeLatencyInfo(std::vector<ui::LatencyInfo>* latency_info) {
  96   if (!current_frame_)
  97     return;
  98   if (latency_info->empty()) {
  99     current_frame_->metadata.latency_info.swap(*latency_info);
 100     return;
 101   }
 102   std::copy(current_frame_->metadata.latency_info.begin(),
 103             current_frame_->metadata.latency_info.end(),
 104             std::back_inserter(*latency_info));
 105   current_frame_->metadata.latency_info.clear();
 106 }
 107
 108 void Surface::RunDrawCallbacks() {
 109   if (!draw_callback_.is_null()) {
 110     base::Closure callback = draw_callback_;
 111     draw_callback_ = base::Closure();
 112     callback.Run();
 113   }
 114 }
 115
 116 void Surface::AddDestructionDependency(SurfaceSequence sequence) {
 117   destruction_dependencies_.push_back(sequence);
 118 }
 119
 120 void Surface::SatisfyDestructionDependencies(
 121     base::hash_set<SurfaceSequence>* sequences) {
 122   destruction_dependencies_.erase(
 123       std::remove_if(
 124           destruction_dependencies_.begin(), destruction_dependencies_.end(),
 125           [sequences](SurfaceSequence seq) { return !!sequences->erase(seq); }),
 126       destruction_dependencies_.end());
 127 }
 128
 129 void Surface::ClearCopyRequests() {
 130   if (current_frame_) {
 131     for (const auto& render_pass :
 132          current_frame_->delegated_frame_data->render_pass_list) {
 133       for (const auto& copy_request : render_pass->copy_requests)
 134         copy_request->SendEmptyResult();
 135     }
 136   }
 137 }
 138
 139 }  // namespace cc