Implement aura::WindowPortMus::CreateCompositorFrameSink()

components/exo/surface.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/exo/surface.h"
 
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/logging.h"
@@ skipping 149 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CustomWindowTargeter);
 };
 
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // Surface, public:
 
-// TODO(fsamuel): exo should not use context_factory_private. Instead, we should
-// request a CompositorFrameSink from the aura::Window. Setting up the
-// BeginFrame hierarchy should be an internal implementation detail of aura or
-// mus in aura-mus.
 Surface::Surface() : window_(new aura::Window(new CustomWindowDelegate(this))) {
   window_->SetType(aura::client::WINDOW_TYPE_CONTROL);
   window_->SetName("ExoSurface");
   window_->SetProperty(kSurfaceKey, this);
   window_->Init(ui::LAYER_SOLID_COLOR);
   window_->SetEventTargeter(base::WrapUnique(new CustomWindowTargeter));
   window_->set_owned_by_parent(false);
   window_->AddObserver(this);
   aura::Env::GetInstance()->context_factory()->AddObserver(this);
   compositor_frame_sink_holder_ = base::MakeUnique<CompositorFrameSinkHolder>(
@@ skipping 599 matching lines @@
     DLOG_IF(WARNING, !gfx::IsExpressibleAsInt(state_.crop.width()) ||
                          !gfx::IsExpressibleAsInt(state_.crop.height()))
         << "Crop rectangle size (" << state_.crop.size().ToString()
         << ") most be expressible using integers when viewport is not set";
     layer_size = gfx::ToCeiledSize(state_.crop.size());
   } else {
     layer_size = gfx::ToCeiledSize(scaled_buffer_size);
   }
 
   content_size_ = layer_size;
+  window_->SetBounds(gfx::Rect(window_->bounds().origin(), content_size_));

[Fady Samuel, 2017/06/07 17:36:26]

Please explain why we need this in a comment?

[Peng, 2017/06/07 19:30:29]

Done.

   // TODO(jbauman): Figure out how this interacts with the pixel size of
   // CopyOutputRequests on the layer.
   gfx::Size contents_surface_size = layer_size;
 
   gfx::PointF uv_top_left(0.f, 0.f);
   gfx::PointF uv_bottom_right(1.f, 1.f);
   if (!state_.crop.IsEmpty()) {
     uv_top_left = state_.crop.origin();
 
     uv_top_left.Scale(1.f / scaled_buffer_size.width(),
@@ skipping 65 matching lines @@
         render_pass->CreateAndAppendDrawQuad<cc::SolidColorDrawQuad>();
     solid_quad->SetNew(quad_state, quad_rect, quad_rect, SK_ColorBLACK, false);
   }
 
   frame.render_pass_list.push_back(std::move(render_pass));
   compositor_frame_sink_holder_->GetCompositorFrameSink()
       ->SubmitCompositorFrame(std::move(frame));
 }
 
 }  // namespace exo