Raster PictureLayerTiling with fractional translation

cc/layers/picture_layer_impl.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_LAYERS_PICTURE_LAYER_IMPL_H_
 #define CC_LAYERS_PICTURE_LAYER_IMPL_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 21 matching lines @@
       NON_EXPORTED_BASE(public PictureLayerTilingClient) {
  public:
   static std::unique_ptr<PictureLayerImpl>
   Create(LayerTreeImpl* tree_impl, int id, Layer::LayerMaskType mask_type) {
     return base::WrapUnique(new PictureLayerImpl(tree_impl, id, mask_type));
   }
   ~PictureLayerImpl() override;
 
   Layer::LayerMaskType mask_type() const { return mask_type_; }
 
+  void ResetRasterScale();
+
   // LayerImpl overrides.
   const char* LayerTypeAsString() const override;
   std::unique_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
   void PushPropertiesTo(LayerImpl* layer) override;
   void AppendQuads(RenderPass* render_pass,
                    AppendQuadsData* append_quads_data) override;
   void NotifyTileStateChanged(const Tile* tile) override;
-  void ResetRasterScale();
+  SimpleEnclosedRegion VisibleOpaqueRegion() const override;
+
   void DidBeginTracing() override;
   void ReleaseResources() override;
   void ReleaseTileResources() override;
   void RecreateTileResources() override;
   Region GetInvalidationRegionForDebugging() override;
 
   // PictureLayerTilingClient overrides.
   std::unique_ptr<Tile> CreateTile(const Tile::CreateInfo& info) override;
   gfx::Size CalculateTileSize(const gfx::Size& content_bounds) const override;
   const Region* GetPendingInvalidation() override;
@@ skipping 13 matching lines @@
   void UpdateCanUseLCDTextAfterCommit();
   bool RasterSourceUsesLCDText() const;
   WhichTree GetTree() const;
 
   // Mask-related functions.
   void GetContentsResourceId(ResourceId* resource_id,
                              gfx::Size* resource_size) const override;
 
   void SetNearestNeighbor(bool nearest_neighbor);
 
+  void SetUseTransformedRasterization(bool use);
+
   size_t GPUMemoryUsageInBytes() const override;
 
   void RunMicroBenchmark(MicroBenchmarkImpl* benchmark) override;
 
   bool CanHaveTilings() const;
 
   PictureLayerTilingSet* picture_layer_tiling_set() { return tilings_.get(); }
 
   // Functions used by tile manager.
   PictureLayerImpl* GetPendingOrActiveTwinLayer() const;
   bool IsOnActiveOrPendingTree() const;
 
   // Used for benchmarking
   RasterSource* GetRasterSource() const { return raster_source_.get(); }
 
   void set_is_directly_composited_image(bool is_directly_composited_image) {
     is_directly_composited_image_ = is_directly_composited_image;
   }
 
   void InvalidateRegionForImages(const ImageIdFlatSet& images_to_invalidate);
 
  protected:
   PictureLayerImpl(LayerTreeImpl* tree_impl,
                    int id,
                    Layer::LayerMaskType mask_type);
-  PictureLayerTiling* AddTiling(float contents_scale);
+  PictureLayerTiling* AddTiling(const ScaleTranslate2d& contents_transform);
   void RemoveAllTilings();
   void AddTilingsForRasterScale();
   void AddLowResolutionTilingIfNeeded();
   bool ShouldAdjustRasterScale() const;
   void RecalculateRasterScales();
+  gfx::Vector2dF CalculateRasterTranslation(float raster_scale);
   void CleanUpTilingsOnActiveLayer(
       const std::vector<PictureLayerTiling*>& used_tilings);
   float MinimumContentsScale() const;
   float MaximumContentsScale() const;
   void UpdateViewportRectForTilePriorityInContentSpace();
   PictureLayerImpl* GetRecycledTwinLayer() const;
 
   void SanityCheckTilingState() const;
 
   void GetDebugBorderProperties(SkColor* color, float* width) const override;
@@ skipping 20 matching lines @@
   float raster_device_scale_;
   float raster_source_scale_;
   float raster_contents_scale_;
   float low_res_raster_contents_scale_;
 
   bool was_screen_space_transform_animating_;
   bool only_used_low_res_last_append_quads_;
   const Layer::LayerMaskType mask_type_;
 
   bool nearest_neighbor_;
+  bool use_transformed_rasterization_;
   bool is_directly_composited_image_;
 
   // Use this instead of |visible_layer_rect()| for tiling calculations. This
   // takes external viewport and transform for tile priority into account.
   gfx::Rect viewport_rect_for_tile_priority_in_content_space_;
 
   gfx::Size gpu_raster_max_texture_size_;
 
   // List of tilings that were used last time we appended quads. This can be
   // used as an optimization not to remove tilings if they are still being
   // drawn. Note that accessing this vector should only be done in the context
   // of comparing pointers, since objects pointed to are not guaranteed to
   // exist.
   std::vector<PictureLayerTiling*> last_append_quads_tilings_;
 
   DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_LAYER_IMPL_H_