cc: Pass Occlusion instead of OcclusionTracker to LayerImpls

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 <limits>
 
 #include "base/basictypes.h"
@@ skipping 528 matching lines @@
         << output_surface_->capabilities().deferred_gl_initialization;
     return DRAW_MODE_SOFTWARE;
   }
 }
 
 static void AppendQuadsForLayer(
     RenderPass* target_render_pass,
     LayerImpl* layer,
     const OcclusionTracker<LayerImpl>& occlusion_tracker,
     AppendQuadsData* append_quads_data) {
-  layer->AppendQuads(target_render_pass, occlusion_tracker, append_quads_data);
+  layer->AppendQuads(
+      target_render_pass,
+      occlusion_tracker.GetCurrentOcclusionForLayer(layer->draw_transform()),

[vmpstr, 2014/10/07 06:44:35]

This is where "conversion" actually happens.

+      append_quads_data);
 }
 
 static void AppendQuadsForRenderSurfaceLayer(
     RenderPass* target_render_pass,
     LayerImpl* layer,
     const RenderPass* contributing_render_pass,
     const OcclusionTracker<LayerImpl>& occlusion_tracker,
     AppendQuadsData* append_quads_data) {
   bool is_replica = false;
   layer->render_surface()->AppendQuads(target_render_pass,
                                        occlusion_tracker,
                                        append_quads_data,
                                        is_replica,
                                        contributing_render_pass->id);
 
   // Add replica after the surface so that it appears below the surface.
   if (layer->has_replica()) {
     is_replica = true;
     layer->render_surface()->AppendQuads(target_render_pass,
                                          occlusion_tracker,

[danakj, 2014/10/07 17:01:23]

surfaceimpl comes next i guess?

[vmpstr, 2014/10/07 18:50:10]

That's the plan. Then possibly cc::Layer::Update call, but I first gotta figure
out what it does with the tracker.

[danakj, 2014/10/07 18:54:26]

TiledLayer calls Occluded() on it to paint-cull. Think that's it.

                                          append_quads_data,
                                          is_replica,
                                          contributing_render_pass->id);
   }
 }
 
 static void AppendQuadsToFillScreen(
     ResourceProvider::ResourceId overhang_resource_id,
     const gfx::SizeF& overhang_resource_scaled_size,
     const gfx::Rect& root_scroll_layer_rect,
@@ skipping 2791 matching lines @@
 }
 
 void LayerTreeHostImpl::UnregisterPictureLayerImpl(PictureLayerImpl* layer) {
   std::vector<PictureLayerImpl*>::iterator it =
       std::find(picture_layers_.begin(), picture_layers_.end(), layer);
   DCHECK(it != picture_layers_.end());
   picture_layers_.erase(it);
 }
 
 }  // namespace cc