chrome/browser/printing/pdf_to_emf_converter.h

   1 // Copyright 2014 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 CHROME_BROWSER_PRINTING_PDF_TO_EMF_CONVERTER_H_
   6 #define CHROME_BROWSER_PRINTING_PDF_TO_EMF_CONVERTER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/memory/ref_counted_memory.h"
  10 #include "base/memory/scoped_ptr.h"
  11
  12 namespace base {
  13 class FilePath;
  14 }
  15
  16 namespace printing {
  17
  18 class MetafilePlayer;
  19 class PdfRenderSettings;
  20
  21 class PdfToEmfConverter {
  22  public:
  23   typedef base::Callback<void(int page_count)> StartCallback;
  24   typedef base::Callback<void(int page_number,
  25                               float scale_factor,
  26                               scoped_ptr<MetafilePlayer> emf)> GetPageCallback;
  27
  28   virtual ~PdfToEmfConverter();
  29
  30   static scoped_ptr<PdfToEmfConverter> CreateDefault();
  31
  32   // Starts conversion of PDF provided as |data|. Calls |start_callback|
  33   // with positive |page_count|. |page_count| is 0 if initialization failed.
  34   virtual void Start(const scoped_refptr<base::RefCountedMemory>& data,
  35                      const PdfRenderSettings& conversion_settings,
  36                      const StartCallback& start_callback) = 0;
  37
  38   // Requests conversion of the page. |page_number| is 0-base page number in
  39   // PDF provided in Start() call.
  40   // Calls |get_page_callback| after conversion. |emf| of callback in not NULL
  41   // if conversion succeeded.
  42   virtual void GetPage(int page_number,
  43                        const GetPageCallback& get_page_callback) = 0;
  44 };
  45
  46 }  // namespace printing
  47
  48 #endif  // CHROME_BROWSER_PRINTING_PDF_TO_EMF_CONVERTER_H_