pdf_metafile_cg_mac.h revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd 
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
17namespace base {
18class FilePath;
19}
20
21namespace gfx {
22class Rect;
23class Size;
24}
25
26namespace printing {
27
28// This class creates a graphics context that renders into a PDF data stream.
29class 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::mac::ScopedCFTypeRef<CGContextRef> context_;
75
76  // PDF backing store.
77  base::mac::ScopedCFTypeRef<CFMutableDataRef> pdf_data_;
78
79  // Lazily-created CGPDFDocument representation of pdf_data_.
80  mutable base::mac::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