ui/compositor/paint_recorder.h

   1 // Copyright 2015 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 UI_COMPOSITOR_PAINT_RECORDER_H_
   6 #define UI_COMPOSITOR_PAINT_RECORDER_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "skia/ext/refptr.h"
  11 #include "ui/compositor/compositor_export.h"
  12 #include "ui/gfx/canvas.h"
  13
  14 namespace cc {
  15 class DisplayItemList;
  16 }
  17
  18 namespace gfx {
  19 class Canvas;
  20 }
  21
  22 class SkCanvas;
  23 class SkPictureRecorder;
  24
  25 namespace ui {
  26 class PaintCache;
  27 class PaintContext;
  28
  29 // A class to hide the complexity behind setting up a recording into a
  30 // DisplayItem. This is meant to be short-lived within the scope of recording
  31 // taking place, the DisplayItem should be removed from the PaintRecorder once
  32 // recording is complete and can be cached.
  33 class COMPOSITOR_EXPORT PaintRecorder {
  34  public:
  35   // The |cache| is owned by the caller and must be kept alive while
  36   // PaintRecorder is in use.
  37   PaintRecorder(const PaintContext& context, PaintCache* cache);
  38   explicit PaintRecorder(const PaintContext& context);
  39   ~PaintRecorder();
  40
  41   // Gets a gfx::Canvas for painting into.
  42   gfx::Canvas* canvas() { return canvas_; }
  43
  44  private:
  45   const PaintContext& context_;
  46   gfx::Canvas owned_canvas_;
  47   gfx::Canvas* canvas_;
  48   PaintCache* cache_;
  49
  50   DISALLOW_COPY_AND_ASSIGN(PaintRecorder);
  51 };
  52
  53 }  // namespace ui
  54
  55 #endif  // UI_COMPOSITOR_PAINT_RECORDER_H_