chrome/browser/printing/pdf_to_emf_converter.h

// Copyright 2014 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 CHROME_BROWSER_PRINTING_PDF_TO_EMF_CONVERTER_H_
#define CHROME_BROWSER_PRINTING_PDF_TO_EMF_CONVERTER_H_

#include "base/callback.h"
#include "base/memory/ref_counted_memory.h"
#include "base/memory/scoped_ptr.h"

namespace base {
class FilePath;
}

namespace printing {

class MetafilePlayer;
class PdfRenderSettings;

class PdfToEmfConverter {
 public:
  typedef base::Callback<void(int page_count)> StartCallback;
  typedef base::Callback<void(int page_number,
                              float scale_factor,
                              scoped_ptr<MetafilePlayer> emf)> GetPageCallback;

  virtual ~PdfToEmfConverter();

  static scoped_ptr<PdfToEmfConverter> CreateDefault();

  // Starts conversion of PDF provided as |data|. Calls |start_callback|
  // with positive |page_count|. |page_count| is 0 if initialization failed.
  virtual void Start(const scoped_refptr<base::RefCountedMemory>& data,
                     const PdfRenderSettings& conversion_settings,
                     const StartCallback& start_callback) = 0;

  // Requests conversion of the page. |page_number| is 0-base page number in
  // PDF provided in Start() call.
  // Calls |get_page_callback| after conversion. |emf| of callback in not NULL
  // if conversion succeeded.
  virtual void GetPage(int page_number,
                       const GetPageCallback& get_page_callback) = 0;
};

}  // namespace printing

#endif  // CHROME_BROWSER_PRINTING_PDF_TO_EMF_CONVERTER_H_