Tile Compression

cc/resources/tile.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_RESOURCES_TILE_H_
 #define CC_RESOURCES_TILE_H_
 
 #include "base/memory/ref_counted.h"
 #include "cc/base/ref_counted_managed.h"
 #include "cc/resources/managed_tile_state.h"
 #include "cc/resources/raster_source.h"
 #include "cc/resources/tile_priority.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace cc {
 
 class TileManager;
 
 class CC_EXPORT Tile : public RefCountedManaged<Tile> {
  public:
-  enum TileRasterFlags { USE_PICTURE_ANALYSIS = 1 << 0 };
+  enum TileRasterFlags {
+    USE_PICTURE_ANALYSIS = 1 << 0,
+    IS_OPAQUE = 1 << 1,
+    FREQUENTLY_INVALIDATED = 1 << 2
+  };
 
   typedef uint64 Id;
 
   Id id() const {
     return id_;
   }
 
   RasterSource* raster_source() { return raster_source_.get(); }
 
   const RasterSource* raster_source() const { return raster_source_.get(); }
@@ skipping 56 matching lines @@
   }
   bool required_for_draw() const { return required_for_draw_; }
   void set_required_for_draw(bool is_required) {
     required_for_draw_ = is_required;
   }
 
   bool use_picture_analysis() const {
     return !!(flags_ & USE_PICTURE_ANALYSIS);
   }
 
+  bool frequently_invalidated() const {
+    return !!(flags_ & FREQUENTLY_INVALIDATED);
+  }
+
   bool HasResources() const { return managed_state_.draw_info.has_resource(); }
   bool NeedsRaster() const {
     return managed_state_.draw_info.mode() ==
                ManagedTileState::DrawInfo::PICTURE_PILE_MODE ||
            !managed_state_.draw_info.IsReadyToDraw();
   }
 
   void AsValueInto(base::debug::TracedValue* dict) const;
 
   inline bool IsReadyToDraw() const {
     return managed_state_.draw_info.IsReadyToDraw();
   }
 
   const ManagedTileState::DrawInfo& draw_info() const {
     return managed_state_.draw_info;
   }
 
   ManagedTileState::DrawInfo& draw_info() { return managed_state_.draw_info; }
 
+  bool IsOpaque() const { return !!(flags_ & IS_OPAQUE); }
+
   float contents_scale() const { return contents_scale_; }
   gfx::Rect content_rect() const { return content_rect_; }
 
   int layer_id() const { return layer_id_; }
 
   int source_frame_number() const { return source_frame_number_; }
 
   void set_raster_source(scoped_refptr<RasterSource> raster_source) {
     DCHECK(raster_source->CoversRect(content_rect_, contents_scale_))
         << "Recording rect: "
@@ skipping 56 matching lines @@
 
   Id id_;
   static Id s_next_id_;
 
   DISALLOW_COPY_AND_ASSIGN(Tile);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TILE_H_