printing/pdf_metafile_skia.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_PDF_METAFILE_SKIA_H_
   6 #define PRINTING_PDF_METAFILE_SKIA_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/logging.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "build/build_config.h"
  12 #include "printing/metafile.h"
  13 #include "skia/ext/platform_canvas.h"
  14
  15 #if defined(OS_WIN)
  16 #include <windows.h>
  17 #endif
  18
  19 class SkBaseDevice;
  20
  21 #if defined(OS_CHROMEOS) || defined(OS_ANDROID)
  22 namespace base {
  23 struct FileDescriptor;
  24 }
  25 #endif
  26
  27 namespace printing {
  28
  29 struct PdfMetafileSkiaData;
  30
  31 // This class uses Skia graphics library to generate a PDF document.
  32 class PRINTING_EXPORT PdfMetafileSkia : public Metafile {
  33  public:
  34   PdfMetafileSkia();
  35   ~PdfMetafileSkia() override;
  36
  37   // Metafile methods.
  38   bool Init() override;
  39   bool InitFromData(const void* src_buffer, uint32_t src_buffer_size) override;
  40
  41   bool StartPage(const gfx::Size& page_size,
  42                  const gfx::Rect& content_area,
  43                  const float& scale_factor) override;
  44   bool FinishPage() override;
  45   bool FinishDocument() override;
  46
  47   uint32_t GetDataSize() const override;
  48   bool GetData(void* dst_buffer, uint32_t dst_buffer_size) const override;
  49
  50   gfx::Rect GetPageBounds(unsigned int page_number) const override;
  51   unsigned int GetPageCount() const override;
  52
  53   gfx::NativeDrawingContext context() const override;
  54
  55 #if defined(OS_WIN)
  56   bool Playback(gfx::NativeDrawingContext hdc,
  57                 const RECT* rect) const override;
  58   bool SafePlayback(gfx::NativeDrawingContext hdc) const override;
  59 #elif defined(OS_MACOSX)
  60   bool RenderPage(unsigned int page_number,
  61                   gfx::NativeDrawingContext context,
  62                   const CGRect rect,
  63                   const MacRenderPageParams& params) const override;
  64 #endif
  65
  66   bool SaveTo(base::File* file) const override;
  67
  68 #if defined(OS_CHROMEOS) || defined(OS_ANDROID)
  69   // TODO(vitalybuka): replace with SaveTo().
  70   bool SaveToFD(const base::FileDescriptor& fd) const;
  71 #endif  // if defined(OS_CHROMEOS) || defined(OS_ANDROID)
  72
  73   // Return a new metafile containing just the current page in draft mode.
  74   scoped_ptr<PdfMetafileSkia> GetMetafileForCurrentPage();
  75
  76   // This method calls StartPage and then returns an appropriate
  77   // PlatformCanvas implementation bound to the context created by
  78   // StartPage or NULL on error.  The skia::PlatformCanvas pointer that
  79   // is returned is owned by this PdfMetafileSkia object and does not
  80   // need to be ref()ed or unref()ed.  The canvas will remain valid
  81   // until FinishPage() or FinishDocument() is called.
  82   skia::PlatformCanvas* GetVectorCanvasForNewPage(const gfx::Size& page_size,
  83                                                   const gfx::Rect& content_area,
  84                                                   const float& scale_factor);
  85
  86  private:
  87   scoped_ptr<PdfMetafileSkiaData> data_;
  88
  89   DISALLOW_COPY_AND_ASSIGN(PdfMetafileSkia);
  90 };
  91
  92 }  // namespace printing
  93
  94 #endif  // PRINTING_PDF_METAFILE_SKIA_H_