1 // This may look like C code, but it is really -*- C++ -*-
2 //
3 // Copyright Bob Friesenhahn, 1999, 2000, 2001, 2002, 2003
4 // Copyright Dirk Lemstra 2013-2015
5 //
6 // Pixels Implementation
7 //
8
9 #define MAGICKCORE_IMPLEMENTATION 1
10 #define MAGICK_PLUSPLUS_IMPLEMENTATION 1
11
12 #include <cstring>
13 #include "Magick++/Include.h"
14 #include <string> // This is here to compile with Visual C++
15 #include "Magick++/Thread.h"
16 #include "Magick++/Exception.h"
17 #include "Magick++/Pixels.h"
18
Pixels(Magick::Image & image_)19 Magick::Pixels::Pixels(Magick::Image &image_)
20 : _image(image_),
21 _x(0),
22 _y(0),
23 _columns(0),
24 _rows(0)
25 {
26 GetPPException;
27 _view=AcquireVirtualCacheView(image_.image(),exceptionInfo),
28 ThrowPPException(image_.quiet());
29 }
30
~Pixels(void)31 Magick::Pixels::~Pixels(void)
32 {
33 if (_view)
34 _view=DestroyCacheView(_view);
35 }
36
get(const ssize_t x_,const ssize_t y_,const size_t columns_,const size_t rows_)37 Magick::Quantum* Magick::Pixels::get(const ssize_t x_,const ssize_t y_,
38 const size_t columns_,const size_t rows_)
39 {
40 _x=x_;
41 _y=y_;
42 _columns=columns_;
43 _rows=rows_;
44
45 GetPPException;
46 Quantum* pixels=GetCacheViewAuthenticPixels(_view,x_,y_,columns_,rows_,
47 exceptionInfo);
48 ThrowPPException(_image.quiet());
49
50 return pixels;
51 }
52
getConst(const ssize_t x_,const ssize_t y_,const size_t columns_,const size_t rows_)53 const Magick::Quantum* Magick::Pixels::getConst(const ssize_t x_,
54 const ssize_t y_,const size_t columns_,const size_t rows_)
55 {
56 _x=x_;
57 _y=y_;
58 _columns=columns_;
59 _rows=rows_;
60
61 GetPPException;
62 const Quantum* pixels=GetCacheViewVirtualPixels(_view,x_,y_,columns_,rows_,
63 exceptionInfo);
64 ThrowPPException(_image.quiet());
65
66 return pixels;
67 }
68
offset(PixelChannel channel) const69 ssize_t Magick::Pixels::offset(PixelChannel channel) const
70 {
71 if (_image.constImage()->channel_map[channel].traits == UndefinedPixelTrait)
72 return -1;
73 return _image.constImage()->channel_map[channel].offset;
74 }
75
set(const ssize_t x_,const ssize_t y_,const size_t columns_,const size_t rows_)76 Magick::Quantum* Magick::Pixels::set(const ssize_t x_,const ssize_t y_,
77 const size_t columns_,const size_t rows_)
78 {
79 _x=x_;
80 _y=y_;
81 _columns=columns_;
82 _rows=rows_;
83
84 GetPPException;
85 Quantum* pixels=QueueCacheViewAuthenticPixels(_view,x_,y_,columns_,rows_,
86 exceptionInfo);
87 ThrowPPException(_image.quiet());
88
89 return pixels;
90 }
91
sync(void)92 void Magick::Pixels::sync(void)
93 {
94 GetPPException;
95 (void) SyncCacheViewAuthenticPixels(_view,exceptionInfo);
96 ThrowPPException(_image.quiet());
97 }
98
99 // Return pixel colormap index array
100 /*
101 Magick::void* Magick::Pixels::metacontent(void)
102 {
103 void* pixel_metacontent=GetCacheViewAuthenticMetacontent(_view);
104
105 if (!pixel_metacontent)
106 _image.throwImageException();
107
108 return pixel_metacontent;
109 }
110 */
111
PixelData(Magick::Image & image_,std::string map_,const StorageType type_)112 Magick::PixelData::PixelData(Magick::Image &image_,std::string map_,
113 const StorageType type_)
114 {
115 init(image_,0,0,image_.columns(),image_.rows(),map_,type_);
116 }
117
PixelData(Magick::Image & image_,const::ssize_t x_,const::ssize_t y_,const size_t width_,const size_t height_,std::string map_,const StorageType type_)118 Magick::PixelData::PixelData(Magick::Image &image_,const ::ssize_t x_,
119 const ::ssize_t y_,const size_t width_,const size_t height_,std::string map_,
120 const StorageType type_)
121 {
122 init(image_,x_,y_,width_,height_,map_,type_);
123 }
124
~PixelData(void)125 Magick::PixelData::~PixelData(void)
126 {
127 relinquish();
128 }
129
data(void) const130 const void *Magick::PixelData::data(void) const
131 {
132 return(_data);
133 }
134
length(void) const135 ::ssize_t Magick::PixelData::length(void) const
136 {
137 return(_length);
138 }
139
size(void) const140 ::ssize_t Magick::PixelData::size(void) const
141 {
142 return(_size);
143 }
144
init(Magick::Image & image_,const::ssize_t x_,const::ssize_t y_,const size_t width_,const size_t height_,std::string map_,const StorageType type_)145 void Magick::PixelData::init(Magick::Image &image_,const ::ssize_t x_,
146 const ::ssize_t y_,const size_t width_,const size_t height_,
147 std::string map_,const StorageType type_)
148 {
149 size_t
150 size;
151
152 _data=(void *) NULL;
153 _length=0;
154 _size=0;
155 if ((x_ < 0) || (width_ == 0) || (y_ < 0) || (height_ == 0) ||
156 (x_ > (ssize_t) image_.columns()) || ((width_ + x_) > image_.columns())
157 || (y_ > (ssize_t) image_.rows()) || ((height_ + y_) > image_.rows())
158 || (map_.length() == 0))
159 return;
160
161 switch(type_)
162 {
163 case CharPixel:
164 size=sizeof(unsigned char);
165 break;
166 case DoublePixel:
167 size=sizeof(double);
168 break;
169 case FloatPixel:
170 size=sizeof(float);
171 break;
172 case LongPixel:
173 size=sizeof(unsigned int);
174 break;
175 case LongLongPixel:
176 size=sizeof(MagickSizeType);
177 break;
178 case QuantumPixel:
179 size=sizeof(Quantum);
180 break;
181 case ShortPixel:
182 size=sizeof(unsigned short);
183 break;
184 default:
185 throwExceptionExplicit(MagickCore::OptionError,"Invalid type");
186 return;
187 }
188
189 _length=width_*height_*map_.length();
190 _size=_length*size;
191 _data=AcquireMagickMemory(_size);
192
193 GetPPException;
194 MagickCore::ExportImagePixels(image_.image(),x_,y_,width_,height_,
195 map_.c_str(),type_,_data,exceptionInfo);
196 if (exceptionInfo->severity != MagickCore::UndefinedException)
197 relinquish();
198 ThrowPPException(image_.quiet());
199 }
200
relinquish(void)201 void Magick::PixelData::relinquish(void) throw()
202 {
203 if (_data != (void *)NULL)
204 _data=RelinquishMagickMemory(_data);
205 _length=0;
206 _size=0;
207 }
208