UI Resource Manager

cc/trees/layer_tree_host.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.h"
 
 #include <algorithm>
 #include <stack>
 
 #include "base/bind.h"
@@ skipping 55 matching lines @@
     scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner) {
   scoped_ptr<LayerTreeHost> layer_tree_host(new LayerTreeHost(client,
                                                               settings));
   if (!layer_tree_host->Initialize(impl_task_runner))
     return scoped_ptr<LayerTreeHost>();
   return layer_tree_host.Pass();
 }
 
 LayerTreeHost::LayerTreeHost(LayerTreeHostClient* client,
                              const LayerTreeSettings& settings)
-    : animating_(false),
+    : ui_resource_counter_(1),
+      animating_(false),
       needs_full_tree_sync_(true),
       needs_filter_context_(false),
       client_(client),
       commit_number_(0),
       rendering_stats_instrumentation_(RenderingStatsInstrumentation::Create()),
       output_surface_can_be_initialized_(true),
       output_surface_lost_(true),
       num_failed_recreate_attempts_(0),
       settings_(settings),
       debug_state_(settings.initial_debug_state),
       overdraw_bottom_height_(0.f),
       device_scale_factor_(1.f),
       visible_(true),
       page_scale_factor_(1.f),
       min_page_scale_factor_(1.f),
       max_page_scale_factor_(1.f),
       trigger_idle_updates_(true),
       background_color_(SK_ColorWHITE),
       has_transparent_background_(false),
       partial_texture_update_requests_(0),
       in_paint_layer_contents_(false),
       total_frames_used_for_lcd_text_metrics_(0) {
+

[aelias_OOO_until_Jul13, 2013/07/10 23:07:22]

nit: accidental whitespace

[powei, 2013/07/11 23:54:44]

Done.

   if (settings_.accelerated_animation_enabled)
     animation_registrar_ = AnimationRegistrar::Create();
   s_num_layer_tree_instances++;
 
   rendering_stats_instrumentation_->set_record_rendering_stats(
       debug_state_.RecordRenderingStats());
 }
 
 bool LayerTreeHost::Initialize(
     scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner) {
@@ skipping 136 matching lines @@
 // this function, keep in mind that the function *runs* on the impl thread! Any
 // code that is logically a main thread operation, e.g. deletion of a Layer,
 // should be delayed until the LayerTreeHost::CommitComplete, which will run
 // after the commit, but on the main thread.
 void LayerTreeHost::FinishCommitOnImplThread(LayerTreeHostImpl* host_impl) {
   DCHECK(proxy_->IsImplThread());
 
   // If there are linked evicted backings, these backings' resources may be put
   // into the impl tree, so we can't draw yet. Determine this before clearing
   // all evicted backings.
+

[aelias_OOO_until_Jul13, 2013/07/10 23:07:22]

nit: accidental whitespace

[powei, 2013/07/11 23:54:44]

Done.

   bool new_impl_tree_has_no_evicted_resources = false;
   if (contents_texture_manager_) {
     new_impl_tree_has_no_evicted_resources =
         !contents_texture_manager_->LinkedEvictedBackingsExist();
 
     // If the memory limit has been increased since this now-finishing
     // commit began, and the extra now-available memory would have been used,
     // then request another commit.
     if (contents_texture_manager_->MaxMemoryLimitBytes() <
             host_impl->memory_allocation_limit_bytes() &&
@@ skipping 77 matching lines @@
   if (pending_page_scale_animation_) {
     host_impl->StartPageScaleAnimation(
         pending_page_scale_animation_->target_offset,
         pending_page_scale_animation_->use_anchor,
         pending_page_scale_animation_->scale,
         base::TimeTicks::Now(),
         pending_page_scale_animation_->duration);
     pending_page_scale_animation_.reset();
   }
 
+  // ui resource processing

[aelias_OOO_until_Jul13, 2013/07/10 23:07:22]

Delete this comment

[powei, 2013/07/11 23:54:44]

Done.

+  while (ui_resource_request_queue_.size() > 0) {
+    UIResourceRequest req = ui_resource_request_queue_.front();
+    ui_resource_request_queue_.pop_front();
+    host_impl->CreateUIResource(req.id, req.bitmap, req.async);
+  }
+
+  while (ui_resource_remove_queue_.size() > 0) {
+    UIResourceId uid = ui_resource_remove_queue_.front();
+    ui_resource_remove_queue_.pop_front();
+    host_impl->DeleteUIResource(uid);
+  }
+
   DCHECK(!sync_tree->ViewportSizeInvalid());
 
   if (new_impl_tree_has_no_evicted_resources) {
     if (sync_tree->ContentsTexturesPurged())
       sync_tree->ResetContentsTexturesPurged();
   }
 
   if (!settings_.impl_side_painting) {
     // If we're not in impl-side painting, the tree is immediately
     // considered active.
@@ skipping 686 matching lines @@
     (*iter).second->Animate(monotonic_time);
     bool start_ready_animations = true;
     (*iter).second->UpdateState(start_ready_animations, NULL);
   }
 }
 
 skia::RefPtr<SkPicture> LayerTreeHost::CapturePicture() {
   return proxy_->CapturePicture();
 }
 
+UIResourceId
+LayerTreeHost::CreateUIResource(scoped_refptr<UIResourceBitmap> bitmap,
+                                UIResourceManagerClient* client) {
+  UIResourceRequest request;
+  request.id = ui_resource_counter_++;
+  request.bitmap = bitmap;
+  request.async = true;
+
+  ui_resource_request_queue_.push_back(request);
+  ui_resource_client_map_[request.id] = client;
+
+  return request.id;
+}
+
+// Deletes a UI resource.  May safely be called more than once.
+void LayerTreeHost::DeleteUIResource(UIResourceId uid) {
+  if (ui_resource_client_map_.find(uid) != ui_resource_client_map_.end()) {
+    ui_resource_remove_queue_.push_back(uid);
+    ui_resource_client_map_.erase(uid);
+  }
+}
+
+void LayerTreeHost::UIResourceReady(UIResourceId id) {
+  if (ui_resource_client_map_.find(id) != ui_resource_client_map_.end()) {
+    ui_resource_client_map_[id]->UIResourceReady(id);
+  }
+}
+
+void LayerTreeHost::UIResourceLost(UIResourceId id) {}
+
+
 }  // namespace cc