[Aura] Added Support for rendering software compositor frames as cc::TextureLayers.

ui/aura/window.cc

 // Copyright (c) 2012 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 "ui/aura/window.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 16 matching lines @@
 #include "ui/aura/window_observer.h"
 #include "ui/base/animation/multi_animation.h"
 #include "ui/compositor/compositor.h"
 #include "ui/compositor/layer.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/path.h"
 #include "ui/gfx/screen.h"
 
 namespace aura {
 
+namespace {
+
+void MailboxReleaseCallback(scoped_ptr<base::SharedMemory> shared_memory,
+                            unsigned sync_point, bool lost_resource) {
+  shared_memory.reset(NULL);

[piman, 2013/06/07 01:26:28]

nit: same as in RWHVA you actually don't need this, it'll go away by itself when
going out of scope.

[slavi, 2013/06/07 21:49:21]

Done.

+}
+
+}  // namespace
+
 Window::Window(WindowDelegate* delegate)
     : type_(client::WINDOW_TYPE_UNKNOWN),
       owned_by_parent_(true),
       delegate_(delegate),
       parent_(NULL),
       transient_parent_(NULL),
       visible_(false),
       id_(-1),
       transparent_(false),
       user_data_(NULL),
@@ skipping 91 matching lines @@
   Env::GetInstance()->NotifyWindowInitialized(this);
 }
 
 ui::Layer* Window::RecreateLayer() {
   // Disconnect the old layer, but don't delete it.
   ui::Layer* old_layer = AcquireLayer();
   if (!old_layer)
     return NULL;
 
   old_layer->set_delegate(NULL);
+  float mailbox_scale_factor;
+  cc::TextureMailbox old_mailbox =
+      old_layer->GetTextureMailbox(&mailbox_scale_factor);
   scoped_refptr<ui::Texture> old_texture = old_layer->external_texture();
   if (delegate_ && old_texture)
     old_layer->SetExternalTexture(delegate_->CopyTexture());
 
   layer_ = new ui::Layer(old_layer->type());
   layer_owner_.reset(layer_);
   layer_->SetVisible(old_layer->visible());
   layer_->set_scale_content(old_layer->scale_content());
   layer_->set_delegate(this);
   layer_->SetMasksToBounds(old_layer->GetMasksToBounds());
   // Move the original texture to the new layer if the old layer has a
   // texture and we could copy it into the old layer,
   // crbug.com/175211.
-  if (delegate_ && old_texture)
+  if (delegate_ && old_texture) {
     layer_->SetExternalTexture(old_texture);
+  } else if (old_mailbox.IsSharedMemory()) {
+    base::SharedMemory* old_buffer = old_mailbox.shared_memory();
+    const size_t size = old_mailbox.shared_memory_size_in_bytes();
+
+    scoped_ptr<base::SharedMemory> new_buffer(new base::SharedMemory);
+    new_buffer->CreateAndMapAnonymous(size);
+
+    if (old_buffer->memory() && new_buffer->memory()) {
+      memcpy(new_buffer->memory(), old_buffer->memory(), size);
+      base::SharedMemory* new_buffer_raw_ptr = new_buffer.get();
+      cc::TextureMailbox::ReleaseCallback callback =
+          base::Bind(MailboxReleaseCallback, Passed(new_buffer.Pass()));
+      cc::TextureMailbox new_mailbox(new_buffer_raw_ptr,
+                                     old_mailbox.shared_memory_size(),
+                                     callback);
+      layer_->SetTextureMailbox(new_mailbox, mailbox_scale_factor);
+    }
+  }
 
   UpdateLayerName(name_);
   layer_->SetFillsBoundsOpaquely(!transparent_);
   // Install new layer as a sibling of the old layer, stacked below it.
   if (old_layer->parent()) {
     old_layer->parent()->Add(layer_);
     old_layer->parent()->StackBelow(layer_, old_layer);
   }
   // Migrate all the child layers over to the new layer. Copy the list because
   // the items are removed during iteration.
@@ skipping 133 matching lines @@
   return layer_->bounds();
 }
 
 void Window::SchedulePaintInRect(const gfx::Rect& rect) {
   if (layer_->SchedulePaint(rect)) {
     FOR_EACH_OBSERVER(
         WindowObserver, observers_, OnWindowPaintScheduled(this, rect));
   }
 }
 
-void Window::SetExternalTexture(ui::Texture* texture) {
-  layer_->SetExternalTexture(texture);
-}
-
 void Window::SetDefaultParentByRootWindow(RootWindow* root_window,
                                           const gfx::Rect& bounds_in_screen) {
   DCHECK(root_window);
 
   // Stacking clients are mandatory on RootWindow objects.
   client::StackingClient* client = client::GetStackingClient(root_window);
   DCHECK(client);
 
   aura::Window* default_parent = client->GetDefaultParent(
       root_window, this, bounds_in_screen);
@@ skipping 776 matching lines @@
   bool contains_mouse = false;
   if (IsVisible()) {
     RootWindow* root_window = GetRootWindow();
     contains_mouse = root_window &&
         ContainsPointInRoot(root_window->GetLastMouseLocationInRoot());
   }
   return contains_mouse;
 }
 
 }  // namespace aura