printing/metafile_skia_wrapper.h

   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
  11 class SkCanvas;
  12
  13 namespace printing {
  14
  15 class PdfMetafileSkia;
  16
  17 // A wrapper class with static methods to set and retrieve a PdfMetafileSkia
  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.
  21 class PRINTING_EXPORT MetafileSkiaWrapper : public SkRefCnt {
  22  public:
  23   static void SetMetafileOnCanvas(const SkCanvas& canvas,
  24                                   PdfMetafileSkia* metafile);
  25
  26   static PdfMetafileSkia* GetMetafileFromCanvas(const SkCanvas& canvas);
  27
  28   // Methods to set and retrieve custom scale factor for metafile from canvas.
  29   static void SetCustomScaleOnCanvas(const SkCanvas& canvas, double scale);
  30   static bool GetCustomScaleOnCanvas(const SkCanvas& canvas, double* scale);
  31
  32  private:
  33   explicit MetafileSkiaWrapper(PdfMetafileSkia* metafile);
  34
  35   PdfMetafileSkia* metafile_;
  36 };
  37
  38 }  // namespace printing
  39
  40 #endif  // PRINTING_METAFILE_SKIA_WRAPPER_H_