text: // 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_PDF_METAFILE_SKIA_H_
  #define PRINTING_PDF_METAFILE_SKIA_H_
  
  #include <stdint.h>
  
  #include "base/logging.h"
  #include "base/macros.h"
  #include "base/memory/scoped_ptr.h"
  #include "build/build_config.h"
  #include "printing/metafile.h"
  #include "skia/ext/platform_canvas.h"
  
  #if defined(OS_WIN)
  #include <windows.h>
  #endif
  
  #if defined(OS_CHROMEOS) || defined(OS_ANDROID)
  namespace base {
  struct FileDescriptor;
  }
  #endif
  
  namespace printing {
  
  struct PdfMetafileSkiaData;
  
  // This class uses Skia graphics library to generate a PDF document.
  class PRINTING_EXPORT PdfMetafileSkia : public Metafile {
   public:
    PdfMetafileSkia();
    ~PdfMetafileSkia() override;
  
    // Metafile methods.
    bool Init() override;
    bool InitFromData(const void* src_buffer, uint32_t src_buffer_size) override;
  
    bool StartPage(const gfx::Size& page_size,
                   const gfx::Rect& content_area,
                   const float& scale_factor) override;
    bool FinishPage() override;
    bool FinishDocument() override;
  
    uint32_t GetDataSize() const override;
    bool GetData(void* dst_buffer, uint32_t dst_buffer_size) const override;
  
    gfx::Rect GetPageBounds(unsigned int page_number) const override;
    unsigned int GetPageCount() const override;
  
    gfx::NativeDrawingContext context() const override;
  
  #if defined(OS_WIN)
    bool Playback(gfx::NativeDrawingContext hdc,
                  const RECT* rect) const override;
    bool SafePlayback(gfx::NativeDrawingContext hdc) const override;
  #elif defined(OS_MACOSX)
    bool RenderPage(unsigned int page_number,
                    gfx::NativeDrawingContext context,
                    const CGRect rect,
                    const MacRenderPageParams& params) const override;
  #endif
  
    bool SaveTo(base::File* file) const override;
  
  #if defined(OS_CHROMEOS) || defined(OS_ANDROID)
    // TODO(vitalybuka): replace with SaveTo().
    bool SaveToFD(const base::FileDescriptor& fd) const;
  #endif  // if defined(OS_CHROMEOS) || defined(OS_ANDROID)
  
    // Return a new metafile containing just the current page in draft mode.
    scoped_ptr<PdfMetafileSkia> GetMetafileForCurrentPage();
  
    // This method calls StartPage and then returns an appropriate
    // PlatformCanvas implementation bound to the context created by
    // StartPage or NULL on error.  The skia::PlatformCanvas pointer that
    // is returned is owned by this PdfMetafileSkia object and does not
    // need to be ref()ed or unref()ed.  The canvas will remain valid
    // until FinishPage() or FinishDocument() is called.
    skia::PlatformCanvas* GetVectorCanvasForNewPage(const gfx::Size& page_size,
                                                    const gfx::Rect& content_area,
                                                    const float& scale_factor);
  
   private:
    scoped_ptr<PdfMetafileSkiaData> data_;
  
    DISALLOW_COPY_AND_ASSIGN(PdfMetafileSkia);
  };
  
  }  // namespace printing
  
  #endif  // PRINTING_PDF_METAFILE_SKIA_H_
  