cc/resources/tile_draw_info.h

   1 // Copyright 2013 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_RESOURCES_TILE_DRAW_INFO_H_
   6 #define CC_RESOURCES_TILE_DRAW_INFO_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/trace_event/trace_event_argument.h"
  10 #include "cc/resources/platform_color.h"
  11 #include "cc/resources/resource_provider.h"
  12 #include "cc/resources/scoped_resource.h"
  13 #include "cc/resources/tile_task_runner.h"
  14
  15 namespace cc {
  16
  17 // This class holds all the state relevant to drawing a tile.
  18 class CC_EXPORT TileDrawInfo {
  19  public:
  20   enum Mode { RESOURCE_MODE, SOLID_COLOR_MODE, PICTURE_PILE_MODE };
  21
  22   TileDrawInfo();
  23   ~TileDrawInfo();
  24
  25   Mode mode() const { return mode_; }
  26
  27   bool IsReadyToDraw() const;
  28
  29   ResourceProvider::ResourceId resource_id() const {
  30     DCHECK(mode_ == RESOURCE_MODE);
  31     DCHECK(resource_);
  32     return resource_->id();
  33   }
  34
  35   gfx::Size resource_size() const {
  36     DCHECK(mode_ == RESOURCE_MODE);
  37     DCHECK(resource_);
  38     return resource_->size();
  39   }
  40
  41   SkColor solid_color() const {
  42     DCHECK(mode_ == SOLID_COLOR_MODE);
  43     return solid_color_;
  44   }
  45
  46   bool contents_swizzled() const {
  47     DCHECK(resource_);
  48     return !PlatformColor::SameComponentOrder(resource_->format());
  49   }
  50
  51   bool requires_resource() const {
  52     return mode_ == RESOURCE_MODE || mode_ == PICTURE_PILE_MODE;
  53   }
  54
  55   inline bool has_resource() const { return !!resource_; }
  56
  57   void SetSolidColorForTesting(SkColor color) { set_solid_color(color); }
  58   void SetResourceForTesting(scoped_ptr<ScopedResource> resource) {
  59     resource_ = resource.Pass();
  60   }
  61
  62   void AsValueInto(base::trace_event::TracedValue* state) const;
  63
  64  private:
  65   friend class Tile;
  66   friend class TileManager;
  67
  68   void set_use_resource() { mode_ = RESOURCE_MODE; }
  69
  70   void set_solid_color(const SkColor& color) {
  71     mode_ = SOLID_COLOR_MODE;
  72     solid_color_ = color;
  73   }
  74
  75   void set_rasterize_on_demand() { mode_ = PICTURE_PILE_MODE; }
  76
  77   Mode mode_;
  78   SkColor solid_color_;
  79   scoped_ptr<ScopedResource> resource_;
  80 };
  81
  82 }  // namespace cc
  83
  84 #endif  // CC_RESOURCES_TILE_DRAW_INFO_H_