Generalize layer mirroring for phantom windows

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 192 matching lines @@
 
 Surface::Surface()
     : window_(new aura::Window(new CustomWindowDelegate(this))),
       surface_manager_(
           aura::Env::GetInstance()->context_factory()->GetSurfaceManager()),
       factory_owner_(new SurfaceFactoryOwner) {
   window_->SetType(ui::wm::WINDOW_TYPE_CONTROL);
   window_->SetName("ExoSurface");
   window_->SetProperty(kSurfaceKey, this);
   window_->Init(ui::LAYER_SOLID_COLOR);
-  window_->set_layer_owner_delegate(this);
   window_->SetEventTargeter(base::WrapUnique(new CustomWindowTargeter));
   window_->set_owned_by_parent(false);
   factory_owner_->surface_ = this;
   factory_owner_->frame_sink_id_ =
       aura::Env::GetInstance()->context_factory()->AllocateFrameSinkId();
   factory_owner_->id_allocator_.reset(new cc::SurfaceIdAllocator());
   surface_manager_->RegisterFrameSinkId(factory_owner_->frame_sink_id_);
   factory_owner_->surface_factory_.reset(new cc::SurfaceFactory(
       factory_owner_->frame_sink_id_, surface_manager_, factory_owner_.get()));
   aura::Env::GetInstance()->context_factory()->AddObserver(this);
@@ skipping 256 matching lines @@
   UpdateSurface(true);
 
   if (!old_local_frame_id.is_null() && old_local_frame_id != local_frame_id_) {
     factory_owner_->surface_factory_->SetPreviousFrameSurface(
         local_frame_id_, old_local_frame_id);
     factory_owner_->surface_factory_->Destroy(old_local_frame_id);
   }
 
   if (old_local_frame_id != local_frame_id_) {
     float contents_surface_to_layer_scale = 1.0;
+    // The bounds must be updated before switching to the new surface, because
+    // the layer may be mirrored, in which case a surface change causes the
+    // mirror layer to update its surface using the latest bounds.
+    window_->layer()->SetBounds(
+        gfx::Rect(window_->layer()->bounds().origin(), content_size_));
     window_->layer()->SetShowSurface(
         cc::SurfaceId(factory_owner_->frame_sink_id_, local_frame_id_),
         base::Bind(&SatisfyCallback, base::Unretained(surface_manager_)),
         base::Bind(&RequireCallback, base::Unretained(surface_manager_)),
         content_size_, contents_surface_to_layer_scale, content_size_);
-    window_->layer()->SetBounds(
-        gfx::Rect(window_->layer()->bounds().origin(), content_size_));
     window_->layer()->SetFillsBoundsOpaquely(
         state_.blend_mode == SkXfermode::kSrc_Mode ||
         state_.opaque_region.contains(
             gfx::RectToSkIRect(gfx::Rect(content_size_))));
   }
 
   // Reset damage.
   pending_damage_.setEmpty();
 
   DCHECK(!current_resource_.id ||
@@ skipping 95 matching lines @@
   return observers_.HasObserver(observer);
 }
 
 std::unique_ptr<base::trace_event::TracedValue> Surface::AsTracedValue() const {
   std::unique_ptr<base::trace_event::TracedValue> value(
       new base::trace_event::TracedValue());
   value->SetString("name", window_->layer()->name());
   return value;
 }
 
-////////////////////////////////////////////////////////////////////////////////
-// ui::LayerOwnerDelegate overrides:
-
-void Surface::OnLayerRecreated(ui::Layer* old_layer, ui::Layer* new_layer) {
-  if (!current_buffer_.buffer())
-    return;
-
-  // TODO(reveman): Give the client a chance to provide new contents.
-  SetSurfaceLayerContents(new_layer);
-}
-
 void Surface::WillDraw(const cc::LocalFrameId& id) {
   while (!active_frame_callbacks_.empty()) {
     active_frame_callbacks_.front().Run(base::TimeTicks::Now());
     active_frame_callbacks_.pop_front();
   }
 }
 
 void Surface::CheckIfSurfaceHierarchyNeedsCommitToNewSurfaces() {
   if (HasLayerHierarchyChanged())
     SetSurfaceHierarchyNeedsCommitToNewSurfaces();
@@ skipping 54 matching lines @@
   return false;
 }
 
 void Surface::SetSurfaceHierarchyNeedsCommitToNewSurfaces() {
   needs_commit_to_new_surface_ = true;
   for (auto& sub_surface_entry : pending_sub_surfaces_) {
     sub_surface_entry.first->SetSurfaceHierarchyNeedsCommitToNewSurfaces();
   }
 }
 
-void Surface::SetSurfaceLayerContents(ui::Layer* layer) {
-  if (local_frame_id_.is_null())
-    return;
-
-  gfx::Size layer_size = layer->bounds().size();
-  float contents_surface_to_layer_scale = 1.0f;
-
-  layer->SetShowSurface(
-      cc::SurfaceId(factory_owner_->frame_sink_id_, local_frame_id_),
-      base::Bind(&SatisfyCallback, base::Unretained(surface_manager_)),
-      base::Bind(&RequireCallback, base::Unretained(surface_manager_)),
-      layer_size, contents_surface_to_layer_scale, layer_size);
-}
-
 void Surface::UpdateResource(bool client_usage) {
   std::unique_ptr<cc::SingleReleaseCallback> texture_mailbox_release_callback;
 
   cc::TextureMailbox texture_mailbox;
   if (current_buffer_.buffer()) {
     texture_mailbox_release_callback =
         current_buffer_.buffer()->ProduceTextureMailbox(
             &texture_mailbox, state_.only_visible_on_secure_output,
             client_usage);
   }
@@ skipping 128 matching lines @@
 
 int64_t Surface::GetPropertyInternal(const void* key,
                                      int64_t default_value) const {
   std::map<const void*, Value>::const_iterator iter = prop_map_.find(key);
   if (iter == prop_map_.end())
     return default_value;
   return iter->second.value;
 }
 
 }  // namespace exo