Extracted MetafilePlayer interface from printing::MetafilePlayer.

printing/emf_win.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PRINTING_EMF_WIN_H_
 #define PRINTING_EMF_WIN_H_
 
 #include <windows.h>
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
+#include "base/memory/scoped_ptr.h"
 #include "printing/metafile.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace gfx {
 class Rect;
 class Size;
 }
@@ skipping 15 matching lines @@
   // Generates a virtual HDC that will record every GDI commands and compile
   // it in a EMF data stream.
   Emf();
   virtual ~Emf();
 
   // Closes metafile.
   void Close();
 
   // Generates a new metafile that will record every GDI command, and will
   // be saved to |metafile_path|.
-  virtual bool InitToFile(const base::FilePath& metafile_path);
+  bool InitToFile(const base::FilePath& metafile_path);
 
   // Initializes the Emf with the data in |metafile_path|.
-  virtual bool InitFromFile(const base::FilePath& metafile_path);
+  bool InitFromFile(const base::FilePath& metafile_path);
 
   // Metafile methods.
   virtual bool Init() OVERRIDE;
   virtual bool InitFromData(const void* src_buffer,
                             uint32 src_buffer_size) OVERRIDE;
 
   virtual SkBaseDevice* StartPageForVectorCanvas(
       const gfx::Size& page_size, const gfx::Rect& content_area,
       const float& scale_factor) OVERRIDE;
   // Inserts a custom GDICOMMENT records indicating StartPage/EndPage calls
   // (since StartPage and EndPage do not work in a metafile DC). Only valid
   // when hdc_ is non-NULL. |page_size|, |content_area|, and |scale_factor| are
   // ignored.
   virtual bool StartPage(const gfx::Size& page_size,
                          const gfx::Rect& content_area,
                          const float& scale_factor) OVERRIDE;
   virtual bool FinishPage() OVERRIDE;
   virtual bool FinishDocument() OVERRIDE;
 
   virtual uint32 GetDataSize() const OVERRIDE;
   virtual bool GetData(void* buffer, uint32 size) const OVERRIDE;
 
-  // Saves the EMF data to a file as-is. It is recommended to use the .emf file
-  // extension but it is not enforced. This function synchronously writes to the
-  // file. For testing only.
-  virtual bool SaveTo(const base::FilePath& file_path) const OVERRIDE;
-
   // Should be passed to Playback to keep the exact same size.
   virtual gfx::Rect GetPageBounds(unsigned int page_number) const OVERRIDE;
 
   virtual unsigned int GetPageCount() const OVERRIDE {
     return page_count_;
   }
 
   virtual HDC context() const OVERRIDE {
     return hdc_;
   }
 
   virtual bool Playback(HDC hdc, const RECT* rect) const OVERRIDE;
   virtual bool SafePlayback(HDC hdc) const OVERRIDE;
 
-  virtual HENHMETAFILE emf() const OVERRIDE {
-    return emf_;
-  }
+  HENHMETAFILE emf() const { return emf_; }
 
   // Returns true if metafile contains alpha blend.
   bool IsAlphaBlendUsed() const;
 
   // Returns new metafile with only bitmap created by playback of the current
   // metafile. Returns NULL if fails.
-  Emf* RasterizeMetafile(int raster_area_in_pixels) const;
+  scoped_ptr<Emf> RasterizeMetafile(int raster_area_in_pixels) const;
 
   // Returns new metafile where AlphaBlend replaced by bitmaps. Returns NULL
   // if fails.
-  Emf* RasterizeAlphaBlend() const;
+  scoped_ptr<Emf> RasterizeAlphaBlend() const;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(EmfTest, DC);
   FRIEND_TEST_ALL_PREFIXES(EmfPrintingTest, PageBreak);
   FRIEND_TEST_ALL_PREFIXES(EmfTest, FileBackedEmf);
 
-  // Retrieves the underlying data stream. It is a helper function.
-  bool GetDataAsVector(std::vector<uint8>* buffer) const;
-
   // Playbacks safely one EMF record.
   static int CALLBACK SafePlaybackProc(HDC hdc,
                                        HANDLETABLE* handle_table,
                                        const ENHMETARECORD* record,
                                        int objects_count,
                                        LPARAM param);
 
   // Compiled EMF data handle.
   HENHMETAFILE emf_;
 
@@ skipping 73 matching lines @@
   std::vector<Record> items_;
 
   EnumerationContext context_;
 
   DISALLOW_COPY_AND_ASSIGN(Enumerator);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_EMF_WIN_H_