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      1 // Copyright 2012 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 #ifndef CC_LAYERS_DELEGATED_RENDERER_LAYER_IMPL_H_
      6 #define CC_LAYERS_DELEGATED_RENDERER_LAYER_IMPL_H_
      7 
      8 #include "base/containers/hash_tables.h"
      9 #include "base/memory/scoped_ptr.h"
     10 #include "cc/base/cc_export.h"
     11 #include "cc/base/scoped_ptr_vector.h"
     12 #include "cc/layers/layer_impl.h"
     13 
     14 namespace cc {
     15 class DelegatedFrameData;
     16 class RenderPassSink;
     17 
     18 class CC_EXPORT DelegatedRendererLayerImpl : public LayerImpl {
     19  public:
     20   static scoped_ptr<DelegatedRendererLayerImpl> Create(
     21       LayerTreeImpl* tree_impl, int id) {
     22     return make_scoped_ptr(new DelegatedRendererLayerImpl(tree_impl, id));
     23   }
     24   virtual ~DelegatedRendererLayerImpl();
     25 
     26   // LayerImpl overrides.
     27   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
     28       OVERRIDE;
     29   virtual bool HasDelegatedContent() const OVERRIDE;
     30   virtual bool HasContributingDelegatedRenderPasses() const OVERRIDE;
     31   virtual RenderPassId FirstContributingRenderPassId() const OVERRIDE;
     32   virtual RenderPassId NextContributingRenderPassId(
     33       RenderPassId previous) const OVERRIDE;
     34   virtual void ReleaseResources() OVERRIDE;
     35   virtual bool WillDraw(DrawMode draw_mode,
     36                         ResourceProvider* resource_provider) OVERRIDE;
     37   virtual void AppendQuads(RenderPass* render_pass,
     38                            const OcclusionTracker<LayerImpl>& occlusion_tracker,
     39                            AppendQuadsData* append_quads_data) OVERRIDE;
     40   virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
     41 
     42   void AppendContributingRenderPasses(RenderPassSink* render_pass_sink);
     43 
     44   // Creates an ID with the resource provider for the child renderer
     45   // that will be sending quads to the layer. Registers the callback to
     46   // inform when resources are no longer in use.
     47   void CreateChildIdIfNeeded(const ReturnCallback& return_callback);
     48 
     49   void SetFrameData(const DelegatedFrameData* frame_data,
     50                     const gfx::RectF& damage_in_frame);
     51 
     52   float inverse_device_scale_factor() const {
     53     return inverse_device_scale_factor_;
     54   }
     55 
     56  protected:
     57   DelegatedRendererLayerImpl(LayerTreeImpl* tree_impl, int id);
     58 
     59   int ChildIdForTesting() const { return child_id_; }
     60   const RenderPassList& RenderPassesInDrawOrderForTesting() const {
     61     return render_passes_in_draw_order_;
     62   }
     63   const ResourceProvider::ResourceIdArray& ResourcesForTesting() const {
     64     return resources_;
     65   }
     66 
     67  private:
     68   void ClearChildId();
     69 
     70   void AppendRainbowDebugBorder(RenderPass* render_pass,
     71                                 AppendQuadsData* append_quads_data);
     72 
     73   void SetRenderPasses(RenderPassList* render_passes_in_draw_order);
     74   void ClearRenderPasses();
     75 
     76   // Returns |true| if the delegated_render_pass_id is part of the current
     77   // frame and can be converted.
     78   bool ConvertDelegatedRenderPassId(RenderPassId delegated_render_pass_id,
     79                                     RenderPassId* output_render_pass_id) const;
     80 
     81   void AppendRenderPassQuads(
     82       RenderPass* render_pass,
     83       const OcclusionTracker<LayerImpl>& occlusion_tracker,
     84       AppendQuadsData* append_quads_data,
     85       const RenderPass* delegated_render_pass,
     86       const gfx::Size& frame_size) const;
     87 
     88   // LayerImpl overrides.
     89   virtual const char* LayerTypeAsString() const OVERRIDE;
     90 
     91   bool have_render_passes_to_push_;
     92   float inverse_device_scale_factor_;
     93   RenderPassList render_passes_in_draw_order_;
     94   base::hash_map<RenderPassId, int> render_passes_index_by_id_;
     95   ResourceProvider::ResourceIdArray resources_;
     96 
     97   int child_id_;
     98   bool own_child_id_;
     99 
    100   DISALLOW_COPY_AND_ASSIGN(DelegatedRendererLayerImpl);
    101 };
    102 
    103 }  // namespace cc
    104 
    105 #endif  // CC_LAYERS_DELEGATED_RENDERER_LAYER_IMPL_H_
    106