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   ~PdfMetafileCg() override;
  33
  34   // Metafile methods.
  35   bool Init() override;
  36   bool InitFromData(const void* src_buffer, uint32_t src_buffer_size) override;
  37
  38   // Not implemented on mac.
  39   bool StartPage(const gfx::Size& page_size,
  40                  const gfx::Rect& content_area,
  41                  const float& scale_factor) override;
  42   bool FinishPage() override;
  43   bool FinishDocument() override;
  44
  45   uint32_t GetDataSize() const override;
  46   bool GetData(void* dst_buffer, uint32_t dst_buffer_size) const override;
  47
  48   gfx::Rect GetPageBounds(unsigned int page_number) const override;
  49   unsigned int GetPageCount() const override;
  50
  51   // Note: The returned context *must not be retained* past Close(). If it is,
  52   // the data returned from GetData will not be valid PDF data.
  53   CGContextRef context() const override;
  54
  55   bool RenderPage(unsigned int page_number,
  56                   gfx::NativeDrawingContext context,
  57                   const CGRect rect,
  58                   const MacRenderPageParams& params) const override;
  59
  60  private:
  61   // Returns a CGPDFDocumentRef version of pdf_data_.
  62   CGPDFDocumentRef GetPDFDocument() const;
  63
  64   base::ThreadChecker thread_checker_;
  65
  66   // Context for rendering to the pdf.
  67   base::ScopedCFTypeRef<CGContextRef> context_;
  68
  69   // PDF backing store.
  70   base::ScopedCFTypeRef<CFMutableDataRef> pdf_data_;
  71
  72   // Lazily-created CGPDFDocument representation of pdf_data_.
  73   mutable base::ScopedCFTypeRef<CGPDFDocumentRef> pdf_doc_;
  74
  75   // Whether or not a page is currently open.
  76   bool page_is_open_;
  77
  78   // Whether this instantiation of the PdfMetafileCg owns the thread_pdf_docs.
  79   bool thread_pdf_docs_owned_;
  80
  81   DISALLOW_COPY_AND_ASSIGN(PdfMetafileCg);
  82 };
  83
  84 }  // namespace printing
  85
  86 #endif  // PRINTING_PDF_METAFILE_CG_MAC_H_