Raster PictureLayerTiling with fractional translation

cc/tiles/picture_layer_tiling_set.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_TILES_PICTURE_LAYER_TILING_SET_H_
 #define CC_TILES_PICTURE_LAYER_TILING_SET_H_
 
 #include <stddef.h>
 
 #include <list>
@@ skipping 62 matching lines @@
       float minimum_contents_scale,
       float maximum_contents_scale);
 
   // This function is called on the sync tree right after commit.
   void UpdateRasterSourceDueToLCDChange(
       scoped_refptr<RasterSource> raster_source,
       const Region& layer_invalidation);
 
   void UpdateTilingsForImplSideInvalidation(const Region& layer_invalidation);
 
-  PictureLayerTiling* AddTiling(float contents_scale,
+  PictureLayerTiling* AddTiling(const ScaleTranslate2d& raster_transform,
                                 scoped_refptr<RasterSource> raster_source);
   size_t num_tilings() const { return tilings_.size(); }
   int NumHighResTilings() const;
   PictureLayerTiling* tiling_at(size_t idx) { return tilings_[idx].get(); }
   const PictureLayerTiling* tiling_at(size_t idx) const {
     return tilings_[idx].get();
   }
   WhichTree tree() const { return tree_; }
 
   PictureLayerTiling* FindTilingWithScaleKey(float scale_key) const;
   PictureLayerTiling* FindTilingWithResolution(TileResolution resolution) const;
 
   void MarkAllTilingsNonIdeal();
 
   // If a tiling exists whose scale is within |snap_to_existing_tiling_ratio|
   // ratio of |start_scale|, then return that tiling's scale. Otherwise, return
   // |start_scale|. If multiple tilings match the criteria, return the one with
   // the least ratio to |start_scale|.
   float GetSnappedContentsScaleKey(float start_scale,
                                    float snap_to_existing_tiling_ratio) const;
 
   // Returns the maximum contents scale of all tilings, or 0 if no tilings
   // exist. Note that this returns the maximum of x and y scales depending on
   // the aspect ratio.
   float GetMaximumContentsScale() const;
 
+  // Remove one tiling.
+  void Remove(PictureLayerTiling* tiling);
+
   // Removes all tilings with a contents scale key < |minimum_scale_key|.
   void RemoveTilingsBelowScaleKey(float minimum_scale_key);
 
   // Removes all tilings with a contents scale key > |maximum_scale_key|.
   void RemoveTilingsAboveScaleKey(float maximum_scale);
 
   // Remove all tilings.
   void RemoveAllTilings();
 
   // Remove all tiles; keep all tilings.
@@ skipping 99 matching lines @@
       int tiling_interest_area_padding,
       float skewport_target_time_in_seconds,
       int skewport_extrapolation_limit_in_screen_pixels,
       float max_preraster_distance);
 
   void CopyTilingsAndPropertiesFromPendingTwin(
       const PictureLayerTilingSet* pending_twin_set,
       scoped_refptr<RasterSource> raster_source,
       const Region& layer_invalidation);
 
-  // Remove one tiling.
-  void Remove(PictureLayerTiling* tiling);
   void VerifyTilings(const PictureLayerTilingSet* pending_twin_set) const;
 
   bool TilingsNeedUpdate(const gfx::Rect& required_rect_in_layer_space,
                          double current_frame_time_in_Seconds);
   gfx::Rect ComputeSkewport(const gfx::Rect& visible_rect_in_layer_space,
                             double current_frame_time_in_seconds,
                             float ideal_contents_scale);
   gfx::Rect ComputeSoonBorderRect(const gfx::Rect& visible_rect_in_layer_space,
                                   float ideal_contents_scale);
   void UpdatePriorityRects(const gfx::Rect& visible_rect_in_layer_space,
@@ skipping 22 matching lines @@
 
   friend class Iterator;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PictureLayerTilingSet);
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_PICTURE_LAYER_TILING_SET_H_