cc/output/overlay_processor.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/output/overlay_processor.h"
   6
   7 #include "cc/output/output_surface.h"
   8 #include "cc/output/overlay_strategy_single_on_top.h"
   9 #include "cc/output/overlay_strategy_underlay.h"
  10 #include "ui/gfx/geometry/rect_conversions.h"
  11 #include "ui/gfx/transform.h"
  12
  13 namespace cc {
  14
  15 OverlayProcessor::OverlayProcessor(OutputSurface* surface,
  16                                    ResourceProvider* resource_provider)
  17     : surface_(surface), resource_provider_(resource_provider) {}
  18
  19 void OverlayProcessor::Initialize() {
  20   DCHECK(surface_);
  21   if (!resource_provider_)
  22     return;
  23
  24   OverlayCandidateValidator* candidates =
  25       surface_->GetOverlayCandidateValidator();
  26   if (candidates) {
  27     strategies_.push_back(scoped_ptr<Strategy>(
  28         new OverlayStrategySingleOnTop(candidates, resource_provider_)));
  29     strategies_.push_back(scoped_ptr<Strategy>(
  30         new OverlayStrategyUnderlay(candidates, resource_provider_)));
  31   }
  32 }
  33
  34 OverlayProcessor::~OverlayProcessor() {}
  35
  36 void OverlayProcessor::ProcessForOverlays(
  37     RenderPassList* render_passes_in_draw_order,
  38     OverlayCandidateList* candidate_list) {
  39   for (StrategyList::iterator it = strategies_.begin(); it != strategies_.end();
  40        ++it) {
  41     if ((*it)->Attempt(render_passes_in_draw_order, candidate_list))
  42       return;
  43   }
  44 }
  45
  46 }  // namespace cc