Magick++ 7.1.0

ImageRef.h
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1 // This may look like C code, but it is really -*- C++ -*-
2 //
3 // Copyright Bob Friesenhahn, 1999, 2000, 2001, 2002
4 //
5 // Copyright @ 2014 ImageMagick Studio LLC, a non-profit organization
6 // dedicated to making software imaging solutions freely available.
7 //
8 // Definition of an Image reference
9 //
10 // This is a private implementation class which should never be
11 // referenced by any user code.
12 //
13
14 #if !defined(Magick_ImageRef_header)
15 #define Magick_ImageRef_header
16
17 #include <string>
18 #include "Magick++/Include.h"
19 #include "Magick++/Thread.h"
20
21 namespace Magick
22 {
23 class Options;
24
25 //
26 // Reference counted access to Image *
27 //
28 class MagickPPExport ImageRef
29 {
30 public:
31
32 // Construct with null image and default options
33 ImageRef(void);
34
35 // Construct with an image pointer and default options
36 ImageRef(MagickCore::Image *image_);
37
38 // Destroy image and options
39 ~ImageRef(void);
40
41 // Decreases reference count and return the new count
42 size_t decrease();
43
44 // Retrieve image from reference
45 MagickCore::Image *&image(void);
46
47 // Increases reference count
48 void increase();
49
50 // Returns true if the reference count is more than one
51 bool isShared();
52
53 // Retrieve Options from reference
54 void options(Options *options_);
55 Options *options(void);
56
57 // Tries to replaces the images with the specified image, returns
58 // a new instance when the current image is shared.
59 static ImageRef *replaceImage(ImageRef *imgRef,
60 MagickCore::Image *replacement_);
61
62 // Image signature. Set force_ to true in order to re-calculate
63 // the signature regardless of whether the image data has been
64 // modified.
65 std::string signature(const bool force_=false);
66
67 private:
68
69 // Construct with an image pointer and options
70 ImageRef(MagickCore::Image *image_,const Options *options_);
71
72 // Copy constructor and assignment are not supported
73 ImageRef(const ImageRef&);
74
75 ImageRef& operator=(const ImageRef&);
76
77 MagickCore::Image *_image; // ImageMagick Image
78 MutexLock _mutexLock; // Mutex lock
79 Options *_options; // User-specified options
80 ::ssize_t _refCount; // Reference count
81 };
82
83 } // end of namespace Magick
84
85 #endif // Magick_ImageRef_header
Magick::Options
Definition: Options.h:30
Magick::ImageRef
Definition: ImageRef.h:28
Magick::MutexLock
Definition: Thread.h:29
Thread.h
MagickPPExport
#define MagickPPExport
Definition: Include.h:297
Include.h
Magick::Image
class MagickPPExport Image
Definition: Drawable.h:722
Magick
Definition: Blob.h:17