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 1999-2021 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/colorspace-private.h"
48 #include "MagickCore/constitute.h"
49 #include "MagickCore/exception.h"
50 #include "MagickCore/exception-private.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/module.h"
57 #include "MagickCore/monitor.h"
58 #include "MagickCore/monitor-private.h"
59 #include "MagickCore/pixel-accessor.h"
60 #include "MagickCore/random_.h"
61 #include "MagickCore/random-private.h"
62 #include "MagickCore/signature-private.h"
63 #include "MagickCore/quantum-private.h"
64 #include "MagickCore/static.h"
65 #include "MagickCore/string_.h"
66 #include "MagickCore/visual-effects.h"
67
68 /*
69 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
70 % %
71 % %
72 % %
73 % R e a d P L A S M A I m a g e %
74 % %
75 % %
76 % %
77 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
78 %
79 % ReadPlasmaImage creates a plasma fractal image. The image is
80 % initialized to the X server color as specified by the filename.
81 %
82 % The format of the ReadPlasmaImage method is:
83 %
84 % Image *ReadPlasmaImage(const ImageInfo *image_info,
85 % ExceptionInfo *exception)
86 %
87 % A description of each parameter follows:
88 %
89 % o image_info: the image info.
90 %
91 % o exception: return any errors or warnings in this structure.
92 %
93 */
94
PlasmaPixel(Image * image,RandomInfo * magick_restrict random_info,const double x,const double y,ExceptionInfo * exception)95 static inline MagickBooleanType PlasmaPixel(Image *image,
96 RandomInfo *magick_restrict random_info,const double x,const double y,
97 ExceptionInfo *exception)
98 {
99 Quantum
100 *q;
101
102 q=GetAuthenticPixels(image,(ssize_t) (x+0.5),(ssize_t) (y+0.5),1,1,
103 exception);
104 if (q == (Quantum *) NULL)
105 return(MagickFalse);
106 SetPixelRed(image,(Quantum) (QuantumRange*
107 GetPseudoRandomValue(random_info)+0.5),q);
108 SetPixelGreen(image,(Quantum) (QuantumRange*
109 GetPseudoRandomValue(random_info)+0.5),q);
110 SetPixelBlue(image,(Quantum) (QuantumRange*
111 GetPseudoRandomValue(random_info)+0.5),q);
112 return(SyncAuthenticPixels(image,exception));
113 }
114
ReadPlasmaImage(const ImageInfo * image_info,ExceptionInfo * exception)115 static Image *ReadPlasmaImage(const ImageInfo *image_info,
116 ExceptionInfo *exception)
117 {
118 Image
119 *image;
120
121 ImageInfo
122 *read_info;
123
124 MagickStatusType
125 status;
126
127 ssize_t
128 x;
129
130 Quantum
131 *q;
132
133 size_t
134 i;
135
136 SegmentInfo
137 segment_info;
138
139 size_t
140 depth,
141 max_depth;
142
143 ssize_t
144 y;
145
146 /*
147 Recursively apply plasma to the image.
148 */
149 read_info=CloneImageInfo(image_info);
150 SetImageInfoBlob(read_info,(void *) NULL,0);
151 (void) FormatLocaleString(read_info->filename,MagickPathExtent,
152 "gradient:%s",image_info->filename);
153 image=ReadImage(read_info,exception);
154 read_info=DestroyImageInfo(read_info);
155 if (image == (Image *) NULL)
156 return((Image *) NULL);
157 (void) SetImageStorageClass(image,DirectClass,exception);
158 if (IsGrayColorspace(image->colorspace) != MagickFalse)
159 (void) SetImageColorspace(image,sRGBColorspace,exception);
160 for (y=0; y < (ssize_t) image->rows; y++)
161 {
162 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
163 if (q == (Quantum *) NULL)
164 break;
165 for (x=0; x < (ssize_t) image->columns; x++)
166 {
167 SetPixelAlpha(image,QuantumRange/2,q);
168 q+=GetPixelChannels(image);
169 }
170 if (SyncAuthenticPixels(image,exception) == MagickFalse)
171 break;
172 }
173 segment_info.x1=0;
174 segment_info.y1=0;
175 segment_info.x2=(double) image->columns-1;
176 segment_info.y2=(double) image->rows-1;
177 if (LocaleCompare(image_info->filename,"fractal") == 0)
178 {
179 RandomInfo
180 *random_info;
181
182 /*
183 Seed pixels before recursion.
184 */
185 (void) SetImageColorspace(image,sRGBColorspace,exception);
186 random_info=AcquireRandomInfo();
187 status=PlasmaPixel(image,random_info,segment_info.x1,segment_info.y1,
188 exception);
189 status&=PlasmaPixel(image,random_info,segment_info.x1,(segment_info.y1+
190 segment_info.y2)/2,exception);
191 status&=PlasmaPixel(image,random_info,segment_info.x1,segment_info.y2,
192 exception);
193 status&=PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
194 segment_info.y1,exception);
195 status&=PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
196 (segment_info.y1+segment_info.y2)/2,exception);
197 status&=PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
198 segment_info.y2,exception);
199 status&=PlasmaPixel(image,random_info,segment_info.x2,segment_info.y1,
200 exception);
201 status&=PlasmaPixel(image,random_info,segment_info.x2,(segment_info.y1+
202 segment_info.y2)/2,exception);
203 status&=PlasmaPixel(image,random_info,segment_info.x2,segment_info.y2,
204 exception);
205 random_info=DestroyRandomInfo(random_info);
206 if (status == MagickFalse)
207 return(image);
208 }
209 i=(size_t) MagickMax(image->columns,image->rows)/2;
210 for (max_depth=0; i != 0; max_depth++)
211 i>>=1;
212 for (depth=1; ; depth++)
213 {
214 if (PlasmaImage(image,&segment_info,0,depth,exception) != MagickFalse)
215 break;
216 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) depth,
217 max_depth);
218 if (status == MagickFalse)
219 break;
220 }
221 return(GetFirstImageInList(image));
222 }
223
224 /*
225 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
226 % %
227 % %
228 % %
229 % R e g i s t e r P L A S M A I m a g e %
230 % %
231 % %
232 % %
233 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
234 %
235 % RegisterPLASMAImage() adds attributes for the Plasma image format to
236 % the list of supported formats. The attributes include the image format
237 % tag, a method to read and/or write the format, whether the format
238 % supports the saving of more than one frame to the same file or blob,
239 % whether the format supports native in-memory I/O, and a brief
240 % description of the format.
241 %
242 % The format of the RegisterPLASMAImage method is:
243 %
244 % size_t RegisterPLASMAImage(void)
245 %
246 */
RegisterPLASMAImage(void)247 ModuleExport size_t RegisterPLASMAImage(void)
248 {
249 MagickInfo
250 *entry;
251
252 entry=AcquireMagickInfo("PLASMA","PLASMA","Plasma fractal image");
253 entry->decoder=(DecodeImageHandler *) ReadPlasmaImage;
254 entry->flags^=CoderAdjoinFlag;
255 entry->format_type=ImplicitFormatType;
256 (void) RegisterMagickInfo(entry);
257 entry=AcquireMagickInfo("PLASMA","FRACTAL","Plasma fractal image");
258 entry->decoder=(DecodeImageHandler *) ReadPlasmaImage;
259 entry->flags^=CoderAdjoinFlag;
260 entry->format_type=ImplicitFormatType;
261 (void) RegisterMagickInfo(entry);
262 return(MagickImageCoderSignature);
263 }
264
265 /*
266 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
267 % %
268 % %
269 % %
270 % U n r e g i s t e r P L A S M A I m a g e %
271 % %
272 % %
273 % %
274 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
275 %
276 % UnregisterPLASMAImage() removes format registrations made by the
277 % PLASMA module from the list of supported formats.
278 %
279 % The format of the UnregisterPLASMAImage method is:
280 %
281 % UnregisterPLASMAImage(void)
282 %
283 */
UnregisterPLASMAImage(void)284 ModuleExport void UnregisterPLASMAImage(void)
285 {
286 (void) UnregisterMagickInfo("FRACTAL");
287 (void) UnregisterMagickInfo("PLASMA");
288 }
289