printing/pdf_metafile_cg_mac.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_CG_MAC_H_
   6 #define PRINTING_PDF_METAFILE_CG_MAC_H_
   7
   8 #include <ApplicationServices/ApplicationServices.h>
   9 #include <CoreFoundation/CoreFoundation.h>
  10
  11 #include "base/basictypes.h"
  12 #include "base/gtest_prod_util.h"
  13 #include "base/mac/scoped_cftyperef.h"
  14 #include "base/threading/thread_checker.h"
  15 #include "printing/metafile.h"
  16
  17 namespace base {
  18 class FilePath;
  19 }
  20
  21 namespace gfx {
  22 class Rect;
  23 class Size;
  24 }
  25
  26 namespace printing {
  27
  28 // This class creates a graphics context that renders into a PDF data stream.
  29 class PRINTING_EXPORT PdfMetafileCg : public Metafile {
  30  public:
  31   PdfMetafileCg();
  32   virtual ~PdfMetafileCg();
  33
  34   // Metafile methods.
  35   virtual bool Init() OVERRIDE;
  36   virtual bool InitFromData(const void* src_buffer,
  37                             uint32 src_buffer_size) OVERRIDE;
  38
  39   // Not implemented on mac.
  40   virtual SkBaseDevice* StartPageForVectorCanvas(
  41       const gfx::Size& page_size, const gfx::Rect& content_area,
  42       const float& scale_factor) OVERRIDE;
  43   virtual bool StartPage(const gfx::Size& page_size,
  44                          const gfx::Rect& content_area,
  45                          const float& scale_factor) OVERRIDE;
  46   virtual bool FinishPage() OVERRIDE;
  47   virtual bool FinishDocument() OVERRIDE;
  48
  49   virtual uint32 GetDataSize() const OVERRIDE;
  50   virtual bool GetData(void* dst_buffer, uint32 dst_buffer_size) const OVERRIDE;
  51
  52   // For testing purposes only.
  53   virtual bool SaveTo(const base::FilePath& file_path) const OVERRIDE;
  54
  55   virtual gfx::Rect GetPageBounds(unsigned int page_number) const OVERRIDE;
  56   virtual unsigned int GetPageCount() const OVERRIDE;
  57
  58   // Note: The returned context *must not be retained* past Close(). If it is,
  59   // the data returned from GetData will not be valid PDF data.
  60   virtual CGContextRef context() const OVERRIDE;
  61
  62   virtual bool RenderPage(unsigned int page_number,
  63                           gfx::NativeDrawingContext context,
  64                           const CGRect rect,
  65                           const MacRenderPageParams& params) const OVERRIDE;
  66
  67  private:
  68   // Returns a CGPDFDocumentRef version of pdf_data_.
  69   CGPDFDocumentRef GetPDFDocument() const;
  70
  71   base::ThreadChecker thread_checker_;
  72
  73   // Context for rendering to the pdf.
  74   base::ScopedCFTypeRef<CGContextRef> context_;
  75
  76   // PDF backing store.
  77   base::ScopedCFTypeRef<CFMutableDataRef> pdf_data_;
  78
  79   // Lazily-created CGPDFDocument representation of pdf_data_.
  80   mutable base::ScopedCFTypeRef<CGPDFDocumentRef> pdf_doc_;
  81
  82   // Whether or not a page is currently open.
  83   bool page_is_open_;
  84
  85   // Whether this instantiation of the PdfMetafileCg owns the thread_pdf_docs.
  86   bool thread_pdf_docs_owned_;
  87
  88   DISALLOW_COPY_AND_ASSIGN(PdfMetafileCg);
  89 };
  90
  91 }  // namespace printing
  92
  93 #endif  // PRINTING_PDF_METAFILE_CG_MAC_H_