cc: Remove all impl-side caps from RendererCapabilitiesImpl.

cc/output/direct_renderer.h

 // Copyright 2012 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.
 
 #ifndef CC_OUTPUT_DIRECT_RENDERER_H_
 #define CC_OUTPUT_DIRECT_RENDERER_H_
 
 #include <memory>
 #include <unordered_map>
 
@@ skipping 22 matching lines @@
 class RendererSettings;
 class ResourceProvider;
 class ScopedResource;
 
 // This is the base class for code shared between the GL and software
 // renderer implementations. "Direct" refers to the fact that it does not
 // delegate rendering to another compositor (see historical DelegatingRenderer
 // for reference).
 class CC_EXPORT DirectRenderer {
  public:
+  struct Capabilities {

[enne (OOO), 2016/08/17 17:48:42]

Where does this get used?

[danakj, 2016/08/17 18:16:41]

I think I was going to do this but then I didn't so ya it doesn't.

+    bool using_partial_swap = false;
+  };
+
   DirectRenderer(const RendererSettings* settings,
                  OutputSurface* output_surface,
                  ResourceProvider* resource_provider);
   virtual ~DirectRenderer();
 
+  void Initialize();
+
+  bool use_partial_swap() const { return use_partial_swap_; }
+
   void SetVisible(bool visible);
   void DecideRenderPassAllocationsForFrame(
       const RenderPassList& render_passes_in_draw_order);
   bool HasAllocatedResourcesForTesting(RenderPassId id) const;
   void DrawFrame(RenderPassList* render_passes_in_draw_order,
                  float device_scale_factor,
                  const gfx::ColorSpace& device_color_space,
                  const gfx::Rect& device_viewport_rect,
                  const gfx::Rect& device_clip_rect);
 
@@ skipping 75 matching lines @@
                                             RenderPass* render_pass);
   void DrawRenderPass(DrawingFrame* frame, const RenderPass* render_pass);
   bool UseRenderPass(DrawingFrame* frame, const RenderPass* render_pass);
 
   void DoDrawPolygon(const DrawPolygon& poly,
                      DrawingFrame* frame,
                      const gfx::Rect& render_pass_scissor,
                      bool use_render_pass_scissor);
 
   // Private interface implemented by subclasses for use by DirectRenderer.
+  virtual bool CanPartialSwap() = 0;
   virtual void BindFramebufferToOutputSurface(DrawingFrame* frame) = 0;
   virtual bool BindFramebufferToTexture(DrawingFrame* frame,
                                         const ScopedResource* resource) = 0;
   virtual void SetScissorTestRect(const gfx::Rect& scissor_rect) = 0;
   virtual void PrepareSurfaceForPass(
       DrawingFrame* frame,
       SurfaceInitializationMode initialization_mode,
       const gfx::Rect& render_pass_scissor) = 0;
   // |clip_region| is a (possibly null) pointer to a quad in the same
   // space as the quad. When non-null only the area of the quad that overlaps
@@ skipping 15 matching lines @@
   virtual void CopyCurrentRenderPassToBitmap(
       DrawingFrame* frame,
       std::unique_ptr<CopyOutputRequest> request) = 0;
 
   const RendererSettings* const settings_;
   OutputSurface* const output_surface_;
   ResourceProvider* const resource_provider_;
   // This can be replaced by test implementations.
   std::unique_ptr<OverlayProcessor> overlay_processor_;
 
+  // Whether it's valid to SwapBuffers with an empty rect. Trivially true when
+  // using partial swap.
+  bool allow_empty_swap_;
+  // Whether partial swap can be used.
+  bool use_partial_swap_;
+
   // TODO(danakj): Just use a vector of pairs here? Hash map is way overkill.
   std::unordered_map<RenderPassId,
                      std::unique_ptr<ScopedResource>,
                      RenderPassIdHash>
       render_pass_textures_;
   std::unordered_map<RenderPassId, TileDrawQuad, RenderPassIdHash>
       render_pass_bypass_quads_;
 
   bool visible_;
 
   // For use in coordinate conversion, this stores the output rect, viewport
   // rect (= unflipped version of glViewport rect), the size of target
   // framebuffer, and the current window space viewport. During a draw, this
   // stores the values for the current render pass; in between draws, they
   // retain the values for the root render pass of the last draw.
   gfx::Rect current_draw_rect_;
   gfx::Rect current_viewport_rect_;
   gfx::Size current_surface_size_;
   gfx::Rect current_window_space_viewport_;
 
  private:
   gfx::Size enlarge_pass_texture_amount_;
 
   DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_DIRECT_RENDERER_H_