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      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 SkDevice* 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_
     94