Magick++  7.1.0
Pixels.cpp
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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, 2003
4 //
5 // Copyright @ 2013 ImageMagick Studio LLC, a non-profit organization
6 // dedicated to making software imaging solutions freely available.
7 //
8 // Pixels Implementation
9 //
10 
11 #define MAGICKCORE_IMPLEMENTATION 1
12 #define MAGICK_PLUSPLUS_IMPLEMENTATION 1
13 
14 #include <cstring>
15 #include "Magick++/Include.h"
16 #include <string> // This is here to compile with Visual C++
17 #include "Magick++/Thread.h"
18 #include "Magick++/Exception.h"
19 #include "Magick++/Pixels.h"
20 
22  : _image(image_),
23  _x(0),
24  _y(0),
25  _columns(0),
26  _rows(0)
27 {
29  _view=AcquireVirtualCacheView(image_.image(),exceptionInfo),
30  ThrowPPException(image_.quiet());
31 }
32 
34 {
35  if (_view)
36  _view=DestroyCacheView(_view);
37 }
38 
39 Magick::Quantum* Magick::Pixels::get(const ssize_t x_,const ssize_t y_,
40  const size_t columns_,const size_t rows_)
41 {
42  _x=x_;
43  _y=y_;
44  _columns=columns_;
45  _rows=rows_;
46 
48  Quantum* pixels=GetCacheViewAuthenticPixels(_view,x_,y_,columns_,rows_,
49  exceptionInfo);
50  ThrowPPException(_image.quiet());
51 
52  return pixels;
53 }
54 
55 const Magick::Quantum* Magick::Pixels::getConst(const ssize_t x_,
56  const ssize_t y_,const size_t columns_,const size_t rows_)
57 {
58  _x=x_;
59  _y=y_;
60  _columns=columns_;
61  _rows=rows_;
62 
64  const Quantum* pixels=GetCacheViewVirtualPixels(_view,x_,y_,columns_,rows_,
65  exceptionInfo);
66  ThrowPPException(_image.quiet());
67 
68  return pixels;
69 }
70 
71 ssize_t Magick::Pixels::offset(PixelChannel channel) const
72 {
73  if (_image.constImage()->channel_map[channel].traits == UndefinedPixelTrait)
74  return -1;
75  return _image.constImage()->channel_map[channel].offset;
76 }
77 
78 Magick::Quantum* Magick::Pixels::set(const ssize_t x_,const ssize_t y_,
79  const size_t columns_,const size_t rows_)
80 {
81  _x=x_;
82  _y=y_;
83  _columns=columns_;
84  _rows=rows_;
85 
87  Quantum* pixels=QueueCacheViewAuthenticPixels(_view,x_,y_,columns_,rows_,
88  exceptionInfo);
89  ThrowPPException(_image.quiet());
90 
91  return pixels;
92 }
93 
95 {
97  (void) SyncCacheViewAuthenticPixels(_view,exceptionInfo);
98  ThrowPPException(_image.quiet());
99 }
100 
101 // Return pixel meta content
103 {
104  void* pixel_metacontent=GetCacheViewAuthenticMetacontent(_view);
105 
106  return pixel_metacontent;
107 }
108 
110  const StorageType type_)
111 {
112  init(image_,0,0,image_.columns(),image_.rows(),map_,type_);
113 }
114 
115 Magick::PixelData::PixelData(Magick::Image &image_,const ::ssize_t x_,
116  const ::ssize_t y_,const size_t width_,const size_t height_,std::string map_,
117  const StorageType type_)
118 {
119  init(image_,x_,y_,width_,height_,map_,type_);
120 }
121 
123 {
124  relinquish();
125 }
126 
127 const void *Magick::PixelData::data(void) const
128 {
129  return(_data);
130 }
131 
132 ::ssize_t Magick::PixelData::length(void) const
133 {
134  return(_length);
135 }
136 
137 ::ssize_t Magick::PixelData::size(void) const
138 {
139  return(_size);
140 }
141 
142 void Magick::PixelData::init(Magick::Image &image_,const ::ssize_t x_,
143  const ::ssize_t y_,const size_t width_,const size_t height_,
144  std::string map_,const StorageType type_)
145 {
146  size_t
147  size;
148 
149  _data=(void *) NULL;
150  _length=0;
151  _size=0;
152  if ((x_ < 0) || (width_ == 0) || (y_ < 0) || (height_ == 0) ||
153  (x_ > (ssize_t) image_.columns()) || ((width_ + x_) > image_.columns())
154  || (y_ > (ssize_t) image_.rows()) || ((height_ + y_) > image_.rows())
155  || (map_.length() == 0))
156  return;
157 
158  switch(type_)
159  {
160  case CharPixel:
161  size=sizeof(unsigned char);
162  break;
163  case DoublePixel:
164  size=sizeof(double);
165  break;
166  case FloatPixel:
167  size=sizeof(float);
168  break;
169  case LongPixel:
170  size=sizeof(unsigned int);
171  break;
172  case LongLongPixel:
173  size=sizeof(MagickSizeType);
174  break;
175  case QuantumPixel:
176  size=sizeof(Quantum);
177  break;
178  case ShortPixel:
179  size=sizeof(unsigned short);
180  break;
181  default:
182  throwExceptionExplicit(MagickCore::OptionError,"Invalid type");
183  return;
184  }
185 
186  _length=width_*height_*map_.length();
187  _size=_length*size;
188  _data=AcquireMagickMemory(_size);
189 
191  MagickCore::ExportImagePixels(image_.image(),x_,y_,width_,height_,
192  map_.c_str(),type_,_data,exceptionInfo);
193  if (exceptionInfo->severity != MagickCore::UndefinedException)
194  relinquish();
195  ThrowPPException(image_.quiet());
196 }
197 
198 void Magick::PixelData::relinquish(void) throw()
199 {
200  if (_data != (void *)NULL)
201  _data=RelinquishMagickMemory(_data);
202  _length=0;
203  _size=0;
204 }
Quantum * get(const ::ssize_t x_, const ::ssize_t y_, const size_t columns_, const size_t rows_)
Definition: Pixels.cpp:39
const Quantum * getConst(const ::ssize_t x_, const ::ssize_t y_, const size_t columns_, const size_t rows_)
Definition: Pixels.cpp:55
void quiet(const bool quiet_)
Definition: Image.cpp:1316
MagickCore::Image *& image(void)
Definition: Image.cpp:5024
::ssize_t length(void) const
Definition: Pixels.cpp:132
const void * data(void) const
Definition: Pixels.cpp:127
void sync(void)
Definition: Pixels.cpp:94
Pixels(Magick::Image &image_)
Definition: Pixels.cpp:21
::ssize_t size(void) const
Definition: Pixels.cpp:137
~Pixels(void)
Definition: Pixels.cpp:33
MagickPPExport void throwExceptionExplicit(const MagickCore::ExceptionType severity_, const char *reason_, const char *description_=(char *) NULL)
Definition: Exception.cpp:808
#define ThrowPPException(quiet)
Definition: Include.h:1580
PixelData(Magick::Image &image_, std::string map_, const StorageType type_)
Definition: Pixels.cpp:109
Quantum * set(const ::ssize_t x_, const ::ssize_t y_, const size_t columns_, const size_t rows_)
Definition: Pixels.cpp:78
ssize_t offset(PixelChannel channel) const
Definition: Pixels.cpp:71
size_t rows(void) const
Definition: Image.cpp:1352
size_t columns(void) const
Definition: Image.cpp:590
void * metacontent(void)
Definition: Pixels.cpp:102
#define GetPPException
Definition: Include.h:1561