1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % PPPP W W PPPP %
7 % P P W W P P %
8 % PPPP W W PPPP %
9 % P W W W P %
10 % P W W P %
11 % %
12 % %
13 % Read Seattle Film Works Image Format %
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/constitute.h"
46 #include "MagickCore/exception.h"
47 #include "MagickCore/exception-private.h"
48 #include "MagickCore/image.h"
49 #include "MagickCore/image-private.h"
50 #include "MagickCore/list.h"
51 #include "MagickCore/magick.h"
52 #include "MagickCore/memory_.h"
53 #include "MagickCore/monitor.h"
54 #include "MagickCore/monitor-private.h"
55 #include "MagickCore/resource_.h"
56 #include "MagickCore/quantum-private.h"
57 #include "MagickCore/static.h"
58 #include "MagickCore/string_.h"
59 #include "MagickCore/module.h"
60
61 /*
62 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
63 % %
64 % %
65 % %
66 % I s P W P %
67 % %
68 % %
69 % %
70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
71 %
72 % IsPWP() returns MagickTrue if the image format type, identified by the
73 % magick string, is PWP.
74 %
75 % The format of the IsPWP method is:
76 %
77 % MagickBooleanType IsPWP(const unsigned char *magick,const size_t length)
78 %
79 % A description of each parameter follows:
80 %
81 % o magick: compare image format pattern against these bytes.
82 %
83 % o length: Specifies the length of the magick string.
84 %
85 %
86 */
IsPWP(const unsigned char * magick,const size_t length)87 static MagickBooleanType IsPWP(const unsigned char *magick,const size_t length)
88 {
89 if (length < 5)
90 return(MagickFalse);
91 if (LocaleNCompare((char *) magick,"SFW95",5) == 0)
92 return(MagickTrue);
93 return(MagickFalse);
94 }
95
96 /*
97 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
98 % %
99 % %
100 % %
101 % R e a d P W P I m a g e %
102 % %
103 % %
104 % %
105 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
106 %
107 % ReadPWPImage() reads a Seattle Film Works multi-image file and returns
108 % it. It allocates the memory necessary for the new Image structure and
109 % returns a pointer to the new image.
110 %
111 % The format of the ReadPWPImage method is:
112 %
113 % Image *ReadPWPImage(const ImageInfo *image_info,ExceptionInfo *exception)
114 %
115 % A description of each parameter follows:
116 %
117 % o image_info: the image info.
118 %
119 % o exception: return any errors or warnings in this structure.
120 %
121 */
ReadPWPImage(const ImageInfo * image_info,ExceptionInfo * exception)122 static Image *ReadPWPImage(const ImageInfo *image_info,ExceptionInfo *exception)
123 {
124 char
125 filename[MagickPathExtent];
126
127 FILE
128 *file;
129
130 Image
131 *image,
132 *next_image,
133 *pwp_image;
134
135 ImageInfo
136 *read_info;
137
138 int
139 c,
140 unique_file;
141
142 MagickBooleanType
143 status;
144
145 register Image
146 *p;
147
148 register ssize_t
149 i;
150
151 size_t
152 filesize,
153 length;
154
155 ssize_t
156 count;
157
158 unsigned char
159 magick[MagickPathExtent];
160
161 /*
162 Open image file.
163 */
164 assert(image_info != (const ImageInfo *) NULL);
165 assert(image_info->signature == MagickCoreSignature);
166 if (image_info->debug != MagickFalse)
167 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
168 image_info->filename);
169 assert(exception != (ExceptionInfo *) NULL);
170 assert(exception->signature == MagickCoreSignature);
171 image=AcquireImage(image_info,exception);
172 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
173 if (status == MagickFalse)
174 {
175 image=DestroyImage(image);
176 return((Image *) NULL);
177 }
178 pwp_image=image;
179 memset(magick,0,sizeof(magick));
180 count=ReadBlob(pwp_image,5,magick);
181 if ((count != 5) || (LocaleNCompare((char *) magick,"SFW95",5) != 0))
182 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
183 read_info=CloneImageInfo(image_info);
184 (void) SetImageInfoProgressMonitor(read_info,(MagickProgressMonitor) NULL,
185 (void *) NULL);
186 SetImageInfoBlob(read_info,(void *) NULL,0);
187 unique_file=AcquireUniqueFileResource(filename);
188 (void) FormatLocaleString(read_info->filename,MagickPathExtent,"sfw:%s",
189 filename);
190 for ( ; ; )
191 {
192 (void) memset(magick,0,sizeof(magick));
193 for (c=ReadBlobByte(pwp_image); c != EOF; c=ReadBlobByte(pwp_image))
194 {
195 for (i=0; i < 17; i++)
196 magick[i]=magick[i+1];
197 magick[17]=(unsigned char) c;
198 if (LocaleNCompare((char *) (magick+12),"SFW94A",6) == 0)
199 break;
200 }
201 if (c == EOF)
202 {
203 (void) RelinquishUniqueFileResource(filename);
204 read_info=DestroyImageInfo(read_info);
205 ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
206 }
207 if (LocaleNCompare((char *) (magick+12),"SFW94A",6) != 0)
208 {
209 (void) RelinquishUniqueFileResource(filename);
210 read_info=DestroyImageInfo(read_info);
211 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
212 }
213 /*
214 Dump SFW image to a temporary file.
215 */
216 file=(FILE *) NULL;
217 if (unique_file != -1)
218 file=fdopen(unique_file,"wb");
219 if ((unique_file == -1) || (file == (FILE *) NULL))
220 {
221 (void) RelinquishUniqueFileResource(filename);
222 read_info=DestroyImageInfo(read_info);
223 ThrowFileException(exception,FileOpenError,"UnableToWriteFile",
224 image->filename);
225 image=DestroyImageList(image);
226 return((Image *) NULL);
227 }
228 length=fwrite("SFW94A",1,6,file);
229 (void) length;
230 filesize=65535UL*magick[2]+256L*magick[1]+magick[0];
231 for (i=0; i < (ssize_t) filesize; i++)
232 {
233 c=ReadBlobByte(pwp_image);
234 if (c == EOF)
235 break;
236 if (fputc(c,file) != c)
237 break;
238 }
239 (void) fclose(file);
240 if (c == EOF)
241 {
242 (void) RelinquishUniqueFileResource(filename);
243 read_info=DestroyImageInfo(read_info);
244 ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
245 }
246 next_image=ReadImage(read_info,exception);
247 if (next_image == (Image *) NULL)
248 break;
249 (void) FormatLocaleString(next_image->filename,MagickPathExtent,
250 "slide_%02ld.sfw",(long) next_image->scene);
251 if (image == (Image *) NULL)
252 image=next_image;
253 else
254 {
255 /*
256 Link image into image list.
257 */
258 for (p=image; p->next != (Image *) NULL; p=GetNextImageInList(p)) ;
259 next_image->previous=p;
260 next_image->scene=p->scene+1;
261 p->next=next_image;
262 }
263 if (image_info->number_scenes != 0)
264 if (next_image->scene >= (image_info->scene+image_info->number_scenes-1))
265 break;
266 status=SetImageProgress(image,LoadImagesTag,TellBlob(pwp_image),
267 GetBlobSize(pwp_image));
268 if (status == MagickFalse)
269 break;
270 }
271 if (unique_file != -1)
272 (void) close(unique_file);
273 (void) RelinquishUniqueFileResource(filename);
274 read_info=DestroyImageInfo(read_info);
275 if (image != (Image *) NULL)
276 {
277 if (EOFBlob(image) != MagickFalse)
278 {
279 char
280 *message;
281
282 message=GetExceptionMessage(errno);
283 (void) ThrowMagickException(exception,GetMagickModule(),
284 CorruptImageError,"UnexpectedEndOfFile","`%s': %s",image->filename,
285 message);
286 message=DestroyString(message);
287 }
288 (void) CloseBlob(image);
289 }
290 return(GetFirstImageInList(image));
291 }
292
293 /*
294 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
295 % %
296 % %
297 % %
298 % R e g i s t e r P W P I m a g e %
299 % %
300 % %
301 % %
302 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
303 %
304 % RegisterPWPImage() adds attributes for the PWP image format to
305 % the list of supported formats. The attributes include the image format
306 % tag, a method to read and/or write the format, whether the format
307 % supports the saving of more than one frame to the same file or blob,
308 % whether the format supports native in-memory I/O, and a brief
309 % description of the format.
310 %
311 % The format of the RegisterPWPImage method is:
312 %
313 % size_t RegisterPWPImage(void)
314 %
315 */
RegisterPWPImage(void)316 ModuleExport size_t RegisterPWPImage(void)
317 {
318 MagickInfo
319 *entry;
320
321 entry=AcquireMagickInfo("PWP","PWP","Seattle Film Works");
322 entry->decoder=(DecodeImageHandler *) ReadPWPImage;
323 entry->magick=(IsImageFormatHandler *) IsPWP;
324 (void) RegisterMagickInfo(entry);
325 return(MagickImageCoderSignature);
326 }
327
328 /*
329 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
330 % %
331 % %
332 % %
333 % U n r e g i s t e r P W P I m a g e %
334 % %
335 % %
336 % %
337 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
338 %
339 % UnregisterPWPImage() removes format registrations made by the
340 % PWP module from the list of supported formats.
341 %
342 % The format of the UnregisterPWPImage method is:
343 %
344 % UnregisterPWPImage(void)
345 %
346 */
UnregisterPWPImage(void)347 ModuleExport void UnregisterPWPImage(void)
348 {
349 (void) UnregisterMagickInfo("PWP");
350 }
351