metafile_skia_wrapper.h revision 5821806d5e7f356e8fa4b058a389a808ea183019 
1// Copyright (c) 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 PRINTING_METAFILE_SKIA_WRAPPER_H_
6#define PRINTING_METAFILE_SKIA_WRAPPER_H_
7
8#include "printing/printing_export.h"
9#include "third_party/skia/include/core/SkRefCnt.h"
10
11class SkCanvas;
12
13namespace printing {
14
15class Metafile;
16
17// A wrapper class with static methods to set and retrieve a Metafile
18// on an SkCanvas.  The ownership of the metafile is not affected and it
19// is the caller's responsibility to ensure that the metafile remains valid
20// as long as the canvas.
21class PRINTING_EXPORT MetafileSkiaWrapper : public SkRefCnt {
22 public:
23  static void SetMetafileOnCanvas(const SkCanvas& canvas, Metafile* metafile);
24
25  static Metafile* GetMetafileFromCanvas(const SkCanvas& canvas);
26
27  // Methods to set and retrieve custom scale factor for metafile from canvas.
28  static void SetCustomScaleOnCanvas(const SkCanvas& canvas, double scale);
29  static bool GetCustomScaleOnCanvas(const SkCanvas& canvas, double* scale);
30
31 private:
32  explicit MetafileSkiaWrapper(Metafile* metafile);
33
34  Metafile* metafile_;
35};
36
37}  // namespace printing
38
39#endif  // PRINTING_METAFILE_SKIA_WRAPPER_H_
40