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, SurfaceFactory* factory)
  22     : surface_id_(id),
  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   if (!draw_callback_.is_null())
  37     draw_callback_.Run(SurfaceDrawStatus::DRAW_SKIPPED);
  38 }
  39
  40 void Surface::QueueFrame(scoped_ptr<CompositorFrame> frame,
  41                          const DrawCallback& callback) {
  42   DCHECK(factory_);
  43   ClearCopyRequests();
  44   TakeLatencyInfo(&frame->metadata.latency_info);
  45   scoped_ptr<CompositorFrame> previous_frame = current_frame_.Pass();
  46   current_frame_ = frame.Pass();
  47   factory_->ReceiveFromChild(
  48       current_frame_->delegated_frame_data->resource_list);
  49   // Empty frames shouldn't be drawn and shouldn't contribute damage, so don't
  50   // increment frame index for them.
  51   if (!current_frame_ ||
  52       !current_frame_->delegated_frame_data->render_pass_list.empty())
  53     ++frame_index_;
  54
  55   if (previous_frame) {
  56     ReturnedResourceArray previous_resources;
  57     TransferableResource::ReturnResources(
  58         previous_frame->delegated_frame_data->resource_list,
  59         &previous_resources);
  60     factory_->UnrefResources(previous_resources);
  61   }
  62   if (!draw_callback_.is_null())
  63     draw_callback_.Run(SurfaceDrawStatus::DRAW_SKIPPED);
  64   draw_callback_ = callback;
  65   factory_->manager()->DidSatisfySequences(
  66       SurfaceIdAllocator::NamespaceForId(surface_id_),
  67       &current_frame_->metadata.satisfies_sequences);
  68 }
  69
  70 void Surface::RequestCopyOfOutput(scoped_ptr<CopyOutputRequest> copy_request) {
  71   if (current_frame_ &&
  72       !current_frame_->delegated_frame_data->render_pass_list.empty())
  73     current_frame_->delegated_frame_data->render_pass_list.back()
  74         ->copy_requests.push_back(copy_request.Pass());
  75   else
  76     copy_request->SendEmptyResult();
  77 }
  78
  79 void Surface::TakeCopyOutputRequests(
  80     std::multimap<RenderPassId, CopyOutputRequest*>* copy_requests) {
  81   DCHECK(copy_requests->empty());
  82   if (current_frame_) {
  83     for (const auto& render_pass :
  84          current_frame_->delegated_frame_data->render_pass_list) {
  85       while (!render_pass->copy_requests.empty()) {
  86         scoped_ptr<CopyOutputRequest> request =
  87             render_pass->copy_requests.take_back();
  88         render_pass->copy_requests.pop_back();
  89         copy_requests->insert(
  90             std::make_pair(render_pass->id, request.release()));
  91       }
  92     }
  93   }
  94 }
  95
  96 const CompositorFrame* Surface::GetEligibleFrame() {
  97   return current_frame_.get();
  98 }
  99
 100 void Surface::TakeLatencyInfo(std::vector<ui::LatencyInfo>* latency_info) {
 101   if (!current_frame_)
 102     return;
 103   if (latency_info->empty()) {
 104     current_frame_->metadata.latency_info.swap(*latency_info);
 105     return;
 106   }
 107   std::copy(current_frame_->metadata.latency_info.begin(),
 108             current_frame_->metadata.latency_info.end(),
 109             std::back_inserter(*latency_info));
 110   current_frame_->metadata.latency_info.clear();
 111 }
 112
 113 void Surface::RunDrawCallbacks(SurfaceDrawStatus drawn) {
 114   if (!draw_callback_.is_null()) {
 115     DrawCallback callback = draw_callback_;
 116     draw_callback_ = DrawCallback();
 117     callback.Run(drawn);
 118   }
 119 }
 120
 121 void Surface::AddDestructionDependency(SurfaceSequence sequence) {
 122   destruction_dependencies_.push_back(sequence);
 123 }
 124
 125 void Surface::SatisfyDestructionDependencies(
 126     base::hash_set<SurfaceSequence>* sequences) {
 127   destruction_dependencies_.erase(
 128       std::remove_if(
 129           destruction_dependencies_.begin(), destruction_dependencies_.end(),
 130           [sequences](SurfaceSequence seq) { return !!sequences->erase(seq); }),
 131       destruction_dependencies_.end());
 132 }
 133
 134 void Surface::ClearCopyRequests() {
 135   if (current_frame_) {
 136     for (const auto& render_pass :
 137          current_frame_->delegated_frame_data->render_pass_list) {
 138       for (const auto& copy_request : render_pass->copy_requests)
 139         copy_request->SendEmptyResult();
 140     }
 141   }
 142 }
 143
 144 }  // namespace cc