cc/picture_pile.h

   1 // Copyright 2012 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_PICTURE_PILE_H_
   6 #define CC_PICTURE_PILE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "cc/cc_export.h"
  10 #include "cc/picture.h"
  11 #include "cc/region.h"
  12 #include "cc/scoped_ptr_vector.h"
  13 #include "ui/gfx/rect.h"
  14 #include "ui/gfx/size.h"
  15
  16 namespace cc {
  17
  18 struct RenderingStats;
  19
  20 class CC_EXPORT PicturePile {
  21 public:
  22   PicturePile();
  23   ~PicturePile();
  24
  25   // Mark a portion of the PicturePile as invalid and needing to be re-recorded
  26   // the next time update is called.
  27   void Invalidate(gfx::Rect);
  28
  29   // Resize the PicturePile, invalidating / dropping recorded pictures as necessary.
  30   void Resize(gfx::Size);
  31
  32   // Re-record parts of the picture that are invalid.
  33   void Update(ContentLayerClient* painter, RenderingStats&);
  34
  35   // Update other with a shallow copy of this (main => compositor thread commit)
  36   void PushPropertiesTo(PicturePile& other);
  37
  38   // Clone a paint-safe version of this picture (with cloned PicturePileRecords)
  39   scoped_ptr<PicturePile> CloneForDrawing();
  40
  41   // Raster a subrect of this PicturePile into the given canvas.
  42   // It's only safe to call paint on a cloned version.
  43   // It is assumed that contentsScale has already been applied to this canvas.
  44   void Raster(SkCanvas* canvas, gfx::Rect rect);
  45
  46 private:
  47   void CopyAllButPile(PicturePile& from, PicturePile& to);
  48
  49   std::vector<scoped_refptr<Picture> > pile_;
  50   gfx::Size size_;
  51   Region invalidation_;
  52   Region prev_invalidation_;
  53
  54   DISALLOW_COPY_AND_ASSIGN(PicturePile);
  55 };
  56
  57 }  // namespace cc
  58
  59 #endif  // CC_PICTURE_PILE_H_