1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % PPPP L AAA SSSSS M M AAA %
7 % P P L A A SS MM MM A A %
8 % PPPP L AAAAA SSS M M M AAAAA %
9 % P L A A SS M M A A %
10 % P LLLLL A A SSSSS M M A A %
11 % %
12 % %
13 % Read a Plasma Image. %
14 % %
15 % Software Design %
16 % Cristy %
17 % July 1992 %
18 % %
19 % %
20 % Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
22 % %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
25 % %
26 % https://imagemagick.org/script/license.php %
27 % %
28 % Unless required by applicable law or agreed to in writing, software %
29 % distributed under the License is distributed on an "AS IS" BASIS, %
30 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31 % See the License for the specific language governing permissions and %
32 % limitations under the License. %
33 % %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35 %
36 %
37 */
38
39 /*
40 Include declarations.
41 */
42 #include "MagickCore/studio.h"
43 #include "MagickCore/blob.h"
44 #include "MagickCore/blob-private.h"
45 #include "MagickCore/cache.h"
46 #include "MagickCore/channel.h"
47 #include "MagickCore/constitute.h"
48 #include "MagickCore/exception.h"
49 #include "MagickCore/exception-private.h"
50 #include "MagickCore/fx.h"
51 #include "MagickCore/image.h"
52 #include "MagickCore/image-private.h"
53 #include "MagickCore/list.h"
54 #include "MagickCore/magick.h"
55 #include "MagickCore/memory_.h"
56 #include "MagickCore/monitor.h"
57 #include "MagickCore/monitor-private.h"
58 #include "MagickCore/pixel-accessor.h"
59 #include "MagickCore/random_.h"
60 #include "MagickCore/random-private.h"
61 #include "MagickCore/signature-private.h"
62 #include "MagickCore/quantum-private.h"
63 #include "MagickCore/static.h"
64 #include "MagickCore/string_.h"
65 #include "MagickCore/module.h"
66
67 /*
68 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
69 % %
70 % %
71 % %
72 % R e a d P L A S M A I m a g e %
73 % %
74 % %
75 % %
76 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
77 %
78 % ReadPlasmaImage creates a plasma fractal image. The image is
79 % initialized to the X server color as specified by the filename.
80 %
81 % The format of the ReadPlasmaImage method is:
82 %
83 % Image *ReadPlasmaImage(const ImageInfo *image_info,
84 % ExceptionInfo *exception)
85 %
86 % A description of each parameter follows:
87 %
88 % o image_info: the image info.
89 %
90 % o exception: return any errors or warnings in this structure.
91 %
92 */
93
PlasmaPixel(Image * image,RandomInfo * random_info,double x,double y,ExceptionInfo * exception)94 static inline void PlasmaPixel(Image *image,RandomInfo *random_info,double x,
95 double y,ExceptionInfo *exception)
96 {
97 register Quantum
98 *q;
99
100 q=GetAuthenticPixels(image,(ssize_t) ceil(x-0.5),(ssize_t) ceil(y-0.5),1,1,
101 exception);
102 if (q == (Quantum *) NULL)
103 return;
104 SetPixelRed(image,ScaleShortToQuantum((unsigned short) (65535.0*
105 GetPseudoRandomValue(random_info)+0.5)),q);
106 SetPixelGreen(image,ScaleShortToQuantum((unsigned short) (65535.0*
107 GetPseudoRandomValue(random_info)+0.5)),q);
108 SetPixelBlue(image,ScaleShortToQuantum((unsigned short) (65535.0*
109 GetPseudoRandomValue(random_info)+0.5)),q);
110 (void) SyncAuthenticPixels(image,exception);
111 }
112
ReadPlasmaImage(const ImageInfo * image_info,ExceptionInfo * exception)113 static Image *ReadPlasmaImage(const ImageInfo *image_info,
114 ExceptionInfo *exception)
115 {
116 Image
117 *image;
118
119 ImageInfo
120 *read_info;
121
122 MagickBooleanType
123 status;
124
125 register ssize_t
126 x;
127
128 register Quantum
129 *q;
130
131 register size_t
132 i;
133
134 SegmentInfo
135 segment_info;
136
137 size_t
138 depth,
139 max_depth;
140
141 ssize_t
142 y;
143
144 /*
145 Recursively apply plasma to the image.
146 */
147 read_info=CloneImageInfo(image_info);
148 SetImageInfoBlob(read_info,(void *) NULL,0);
149 (void) FormatLocaleString(read_info->filename,MagickPathExtent,
150 "gradient:%s",image_info->filename);
151 image=ReadImage(read_info,exception);
152 read_info=DestroyImageInfo(read_info);
153 if (image == (Image *) NULL)
154 return((Image *) NULL);
155 (void) SetImageStorageClass(image,DirectClass,exception);
156 for (y=0; y < (ssize_t) image->rows; y++)
157 {
158 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
159 if (q == (Quantum *) NULL)
160 break;
161 for (x=0; x < (ssize_t) image->columns; x++)
162 {
163 SetPixelAlpha(image,QuantumRange/2,q);
164 q+=GetPixelChannels(image);
165 }
166 if (SyncAuthenticPixels(image,exception) == MagickFalse)
167 break;
168 }
169 segment_info.x1=0;
170 segment_info.y1=0;
171 segment_info.x2=(double) image->columns-1;
172 segment_info.y2=(double) image->rows-1;
173 if (LocaleCompare(image_info->filename,"fractal") == 0)
174 {
175 RandomInfo
176 *random_info;
177
178 /*
179 Seed pixels before recursion.
180 */
181 (void) SetImageColorspace(image,sRGBColorspace,exception);
182 random_info=AcquireRandomInfo();
183 PlasmaPixel(image,random_info,segment_info.x1,segment_info.y1,exception);
184 PlasmaPixel(image,random_info,segment_info.x1,(segment_info.y1+
185 segment_info.y2)/2,exception);
186 PlasmaPixel(image,random_info,segment_info.x1,segment_info.y2,exception);
187 PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
188 segment_info.y1,exception);
189 PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
190 (segment_info.y1+segment_info.y2)/2,exception);
191 PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
192 segment_info.y2,exception);
193 PlasmaPixel(image,random_info,segment_info.x2,segment_info.y1,exception);
194 PlasmaPixel(image,random_info,segment_info.x2,(segment_info.y1+
195 segment_info.y2)/2,exception);
196 PlasmaPixel(image,random_info,segment_info.x2,segment_info.y2,exception);
197 random_info=DestroyRandomInfo(random_info);
198 }
199 i=(size_t) MagickMax(image->columns,image->rows)/2;
200 for (max_depth=0; i != 0; max_depth++)
201 i>>=1;
202 for (depth=1; ; depth++)
203 {
204 if (PlasmaImage(image,&segment_info,0,depth,exception) != MagickFalse)
205 break;
206 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) depth,
207 max_depth);
208 if (status == MagickFalse)
209 break;
210 }
211 return(GetFirstImageInList(image));
212 }
213
214 /*
215 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
216 % %
217 % %
218 % %
219 % R e g i s t e r P L A S M A I m a g e %
220 % %
221 % %
222 % %
223 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
224 %
225 % RegisterPLASMAImage() adds attributes for the Plasma image format to
226 % the list of supported formats. The attributes include the image format
227 % tag, a method to read and/or write the format, whether the format
228 % supports the saving of more than one frame to the same file or blob,
229 % whether the format supports native in-memory I/O, and a brief
230 % description of the format.
231 %
232 % The format of the RegisterPLASMAImage method is:
233 %
234 % size_t RegisterPLASMAImage(void)
235 %
236 */
RegisterPLASMAImage(void)237 ModuleExport size_t RegisterPLASMAImage(void)
238 {
239 MagickInfo
240 *entry;
241
242 entry=AcquireMagickInfo("PLASMA","PLASMA","Plasma fractal image");
243 entry->decoder=(DecodeImageHandler *) ReadPlasmaImage;
244 entry->flags^=CoderAdjoinFlag;
245 entry->format_type=ImplicitFormatType;
246 (void) RegisterMagickInfo(entry);
247 entry=AcquireMagickInfo("PLASMA","FRACTAL","Plasma fractal image");
248 entry->decoder=(DecodeImageHandler *) ReadPlasmaImage;
249 entry->flags^=CoderAdjoinFlag;
250 entry->format_type=ImplicitFormatType;
251 (void) RegisterMagickInfo(entry);
252 return(MagickImageCoderSignature);
253 }
254
255 /*
256 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
257 % %
258 % %
259 % %
260 % U n r e g i s t e r P L A S M A I m a g e %
261 % %
262 % %
263 % %
264 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
265 %
266 % UnregisterPLASMAImage() removes format registrations made by the
267 % PLASMA module from the list of supported formats.
268 %
269 % The format of the UnregisterPLASMAImage method is:
270 %
271 % UnregisterPLASMAImage(void)
272 %
273 */
UnregisterPLASMAImage(void)274 ModuleExport void UnregisterPLASMAImage(void)
275 {
276 (void) UnregisterMagickInfo("FRACTAL");
277 (void) UnregisterMagickInfo("PLASMA");
278 }
279