cc/surfaces/surface_display_output_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_display_output_surface.h"
   6
   7 #include "base/bind.h"
   8 #include "cc/output/compositor_frame.h"
   9 #include "cc/output/compositor_frame_ack.h"
  10 #include "cc/surfaces/display.h"
  11 #include "cc/surfaces/onscreen_display_client.h"
  12 #include "cc/surfaces/surface.h"
  13 #include "cc/surfaces/surface_manager.h"
  14
  15 namespace cc {
  16
  17 SurfaceDisplayOutputSurface::SurfaceDisplayOutputSurface(
  18     SurfaceManager* surface_manager,
  19     SurfaceIdAllocator* allocator,
  20     const scoped_refptr<ContextProvider>& context_provider,
  21     const scoped_refptr<ContextProvider>& worker_context_provider)
  22     : OutputSurface(context_provider, worker_context_provider),
  23       display_client_(NULL),
  24       factory_(surface_manager, this),
  25       allocator_(allocator) {
  26   factory_.set_needs_sync_points(false);
  27   capabilities_.delegated_rendering = true;
  28   capabilities_.max_frames_pending = 1;
  29   capabilities_.adjust_deadline_for_parent = true;
  30   capabilities_.can_force_reclaim_resources = true;
  31   // Display and SurfaceDisplayOutputSurface share a GL context, so sync
  32   // points aren't needed when passing resources between them.
  33   capabilities_.delegated_sync_points_required = false;
  34 }
  35
  36 SurfaceDisplayOutputSurface::~SurfaceDisplayOutputSurface() {
  37   client_ = NULL;
  38   if (!surface_id_.is_null()) {
  39     factory_.Destroy(surface_id_);
  40   }
  41 }
  42
  43 void SurfaceDisplayOutputSurface::ReceivedVSyncParameters(
  44     base::TimeTicks timebase,
  45     base::TimeDelta interval) {
  46   CommitVSyncParameters(timebase, interval);
  47 }
  48
  49 void SurfaceDisplayOutputSurface::SwapBuffers(CompositorFrame* frame) {
  50   gfx::Size frame_size =
  51       frame->delegated_frame_data->render_pass_list.back()->output_rect.size();
  52   if (frame_size.IsEmpty() || frame_size != display_size_) {
  53     if (!surface_id_.is_null()) {
  54       factory_.Destroy(surface_id_);
  55     }
  56     surface_id_ = allocator_->GenerateId();
  57     factory_.Create(surface_id_);
  58     display_size_ = frame_size;
  59   }
  60   display_client_->display()->SetSurfaceId(surface_id_,
  61                                            frame->metadata.device_scale_factor);
  62
  63   client_->DidSwapBuffers();
  64
  65   scoped_ptr<CompositorFrame> frame_copy(new CompositorFrame());
  66   frame->AssignTo(frame_copy.get());
  67   factory_.SubmitCompositorFrame(
  68       surface_id_, frame_copy.Pass(),
  69       base::Bind(&SurfaceDisplayOutputSurface::SwapBuffersComplete,
  70                  base::Unretained(this)));
  71 }
  72
  73 bool SurfaceDisplayOutputSurface::BindToClient(OutputSurfaceClient* client) {
  74   DCHECK(client);
  75   DCHECK(display_client_);
  76   client_ = client;
  77   // Avoid initializing GL context here, as this should be sharing the
  78   // Display's context.
  79   return display_client_->Initialize();
  80 }
  81
  82 void SurfaceDisplayOutputSurface::ForceReclaimResources() {
  83   if (!surface_id_.is_null())
  84     factory_.SubmitCompositorFrame(surface_id_, nullptr,
  85                                    SurfaceFactory::DrawCallback());
  86 }
  87
  88 void SurfaceDisplayOutputSurface::ReturnResources(
  89     const ReturnedResourceArray& resources) {
  90   CompositorFrameAck ack;
  91   ack.resources = resources;
  92   if (client_)
  93     client_->ReclaimResources(&ack);
  94 }
  95
  96 void SurfaceDisplayOutputSurface::SwapBuffersComplete(SurfaceDrawStatus drawn) {
  97   if (client_ && !display_client_->output_surface_lost())
  98     client_->DidSwapBuffersComplete();
  99 }
 100
 101 }  // namespace cc