cc::OutputSurfaceClient::InitializeForGL

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 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 "cc/trees/layer_tree_host_impl.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/json/json_writer.h"
@@ skipping 1438 matching lines @@
 
   // Note: order is important here.
   renderer_.reset();
   tile_manager_.reset();
   resource_provider_.reset();
   output_surface_.reset();
 
   if (!output_surface->BindToClient(this))
     return false;
 
-  if (output_surface->capabilities().deferred_gl_initialization) {
+  return DoInitializeRenderer(output_surface.Pass(),
+                              false /* is_deferred_init */);
+}
+
+bool LayerTreeHostImpl::DoInitializeRenderer(
+    scoped_ptr<OutputSurface> output_surface,
+    bool is_deferred_init) {
+  if (output_surface->capabilities().deferred_gl_initialization &&
+      !is_deferred_init) {
     // TODO(joth): Defer creating the Renderer too, until GL is initialized.
     // See http://crbug.com/230197
     renderer_ = SoftwareRenderer::Create(this, output_surface.get(), NULL);
   } else {
     scoped_ptr<ResourceProvider> resource_provider = ResourceProvider::Create(
         output_surface.get(), settings_.highp_threshold_min);
     if (!resource_provider)
       return false;
 
     if (output_surface->capabilities().has_parent_compositor) {
@@ skipping 36 matching lines @@
 
   // See note in LayerTreeImpl::UpdateDrawProperties.  Renderer needs
   // to be initialized to get max texture size.
   active_tree_->set_needs_update_draw_properties();
   if (pending_tree_)
     pending_tree_->set_needs_update_draw_properties();
 
   return true;
 }
 
+bool LayerTreeHostImpl::DeferredInitialize(
+    scoped_refptr<ContextProvider> offscreen_context_provider) {
+  DCHECK(output_surface_->capabilities().deferred_gl_initialization);
+  DCHECK(output_surface_->context3d());
+
+  // TODO(boliu): This is temporary until proper resource clean up is possible
+  // without resetting |tile_manager_| or |resource_provider_|.
+  DCHECK(!resource_provider_);
+
+  bool success =
+      DoInitializeRenderer(output_surface_.Pass(), true /* is_deferred_init */);
+  client_->DidTryInitializeRendererOnImplThread(success,
+                                                offscreen_context_provider);
+  return success;

[danakj, 2013/06/05 21:53:32]

AIUI, the output surface will never have an offscreen provider to give here,
since it can't go to the main thread. So when you switch to hardware mode,
things like CSS filters are going to disappear until you do a commit. So.. you
probably want to set needs commit here?

[boliu, 2013/06/05 22:17:27]

If the offscreen context is the only thing for this needs commit, then I would
leave it out for now. I think we can should be able to get a context here
"eventually".

+}
+
 void LayerTreeHostImpl::SetViewportSize(gfx::Size device_viewport_size) {
   if (device_viewport_size == device_viewport_size_)
     return;
 
   if (pending_tree_ && device_viewport_size_ != device_viewport_size)
     active_tree_->SetViewportSizeInvalid();
 
   device_viewport_size_ = device_viewport_size;
 
   UpdateMaxScrollOffset();
@@ skipping 746 matching lines @@
 }
 
 void LayerTreeHostImpl::SetDebugState(const LayerTreeDebugState& debug_state) {
   if (debug_state_.continuous_painting != debug_state.continuous_painting)
     paint_time_counter_->ClearHistory();
 
   debug_state_ = debug_state;
 }
 
 }  // namespace cc