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