1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % SSSSS CCCC TTTTT %
7 % SS C T %
8 % SSS C T %
9 % SS C T %
10 % SSSSS CCCC T %
11 % %
12 % %
13 % Read Scitex HandShake Image Format %
14 % %
15 % Software Design %
16 % Cristy %
17 % July 1992 %
18 % %
19 % %
20 % Copyright 1999-2016 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 % http://www.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/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/module.h"
54 #include "MagickCore/monitor.h"
55 #include "MagickCore/monitor-private.h"
56 #include "MagickCore/pixel-accessor.h"
57 #include "MagickCore/quantum-private.h"
58 #include "MagickCore/static.h"
59 #include "MagickCore/string_.h"
60 #include "MagickCore/string-private.h"
61
62 /*
63 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
64 % %
65 % %
66 % %
67 % I s S C T %
68 % %
69 % %
70 % %
71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
72 %
73 % IsSCT() returns MagickTrue if the image format type, identified by the
74 % magick string, is SCT.
75 %
76 % The format of the IsSCT method is:
77 %
78 % MagickBooleanType IsSCT(const unsigned char *magick,const size_t length)
79 %
80 % A description of each parameter follows:
81 %
82 % o magick: compare image format pattern against these bytes.
83 %
84 % o length: Specifies the length of the magick string.
85 %
86 */
IsSCT(const unsigned char * magick,const size_t length)87 static MagickBooleanType IsSCT(const unsigned char *magick,const size_t length)
88 {
89 if (length < 2)
90 return(MagickFalse);
91 if (LocaleNCompare((const char *) magick,"CT",2) == 0)
92 return(MagickTrue);
93 return(MagickFalse);
94 }
95
96 /*
97 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
98 % %
99 % %
100 % %
101 % R e a d S C T I m a g e %
102 % %
103 % %
104 % %
105 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
106 %
107 % ReadSCTImage() reads a Scitex image file and returns it. It allocates
108 % the memory necessary for the new Image structure and returns a pointer to
109 % the new image.
110 %
111 % The format of the ReadSCTImage method is:
112 %
113 % Image *ReadSCTImage(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 */
ReadSCTImage(const ImageInfo * image_info,ExceptionInfo * exception)122 static Image *ReadSCTImage(const ImageInfo *image_info,ExceptionInfo *exception)
123 {
124 char
125 magick[2];
126
127 Image
128 *image;
129
130 MagickBooleanType
131 status;
132
133 double
134 height,
135 width;
136
137 Quantum
138 pixel;
139
140 register ssize_t
141 i,
142 x;
143
144 register Quantum
145 *q;
146
147 ssize_t
148 count,
149 y;
150
151 unsigned char
152 buffer[768];
153
154 size_t
155 separations,
156 separations_mask,
157 units;
158
159 /*
160 Open image file.
161 */
162 assert(image_info != (const ImageInfo *) NULL);
163 assert(image_info->signature == MagickCoreSignature);
164 if (image_info->debug != MagickFalse)
165 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
166 image_info->filename);
167 assert(exception != (ExceptionInfo *) NULL);
168 assert(exception->signature == MagickCoreSignature);
169 image=AcquireImage(image_info,exception);
170 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
171 if (status == MagickFalse)
172 {
173 image=DestroyImageList(image);
174 return((Image *) NULL);
175 }
176 /*
177 Read control block.
178 */
179 count=ReadBlob(image,80,buffer);
180 (void) count;
181 count=ReadBlob(image,2,(unsigned char *) magick);
182 if ((LocaleNCompare((char *) magick,"CT",2) != 0) &&
183 (LocaleNCompare((char *) magick,"LW",2) != 0) &&
184 (LocaleNCompare((char *) magick,"BM",2) != 0) &&
185 (LocaleNCompare((char *) magick,"PG",2) != 0) &&
186 (LocaleNCompare((char *) magick,"TX",2) != 0))
187 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
188 if ((LocaleNCompare((char *) magick,"LW",2) == 0) ||
189 (LocaleNCompare((char *) magick,"BM",2) == 0) ||
190 (LocaleNCompare((char *) magick,"PG",2) == 0) ||
191 (LocaleNCompare((char *) magick,"TX",2) == 0))
192 ThrowReaderException(CoderError,"OnlyContinuousTonePictureSupported");
193 count=ReadBlob(image,174,buffer);
194 count=ReadBlob(image,768,buffer);
195 /*
196 Read paramter block.
197 */
198 units=1UL*ReadBlobByte(image);
199 if (units == 0)
200 image->units=PixelsPerCentimeterResolution;
201 separations=1UL*ReadBlobByte(image);
202 separations_mask=ReadBlobMSBShort(image);
203 count=ReadBlob(image,14,buffer);
204 buffer[14]='\0';
205 height=StringToDouble((char *) buffer,(char **) NULL);
206 count=ReadBlob(image,14,buffer);
207 width=StringToDouble((char *) buffer,(char **) NULL);
208 count=ReadBlob(image,12,buffer);
209 buffer[12]='\0';
210 image->rows=StringToUnsignedLong((char *) buffer);
211 count=ReadBlob(image,12,buffer);
212 image->columns=StringToUnsignedLong((char *) buffer);
213 count=ReadBlob(image,200,buffer);
214 count=ReadBlob(image,768,buffer);
215 if (separations_mask == 0x0f)
216 SetImageColorspace(image,CMYKColorspace,exception);
217 image->resolution.x=1.0*image->columns/width;
218 image->resolution.y=1.0*image->rows/height;
219 if (image_info->ping != MagickFalse)
220 {
221 (void) CloseBlob(image);
222 return(GetFirstImageInList(image));
223 }
224 status=SetImageExtent(image,image->columns,image->rows,exception);
225 if (status == MagickFalse)
226 return(DestroyImageList(image));
227 /*
228 Convert SCT raster image to pixel packets.
229 */
230 for (y=0; y < (ssize_t) image->rows; y++)
231 {
232 for (i=0; i < (ssize_t) separations; i++)
233 {
234 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
235 if (q == (Quantum *) NULL)
236 break;
237 for (x=0; x < (ssize_t) image->columns; x++)
238 {
239 pixel=(Quantum) ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
240 if (image->colorspace == CMYKColorspace)
241 pixel=(Quantum) (QuantumRange-pixel);
242 switch (i)
243 {
244 case 0:
245 {
246 SetPixelRed(image,pixel,q);
247 SetPixelGreen(image,pixel,q);
248 SetPixelBlue(image,pixel,q);
249 break;
250 }
251 case 1:
252 {
253 SetPixelGreen(image,pixel,q);
254 break;
255 }
256 case 2:
257 {
258 SetPixelBlue(image,pixel,q);
259 break;
260 }
261 case 3:
262 {
263 if (image->colorspace == CMYKColorspace)
264 SetPixelBlack(image,pixel,q);
265 break;
266 }
267 }
268 q+=GetPixelChannels(image);
269 }
270 if (SyncAuthenticPixels(image,exception) == MagickFalse)
271 break;
272 if ((image->columns % 2) != 0)
273 (void) ReadBlobByte(image); /* pad */
274 }
275 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
276 image->rows);
277 if (status == MagickFalse)
278 break;
279 }
280 if (EOFBlob(image) != MagickFalse)
281 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
282 image->filename);
283 (void) CloseBlob(image);
284 return(GetFirstImageInList(image));
285 }
286
287 /*
288 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
289 % %
290 % %
291 % %
292 % R e g i s t e r S C T I m a g e %
293 % %
294 % %
295 % %
296 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
297 %
298 % RegisterSCTImage() adds attributes for the SCT image format to
299 % the list of supported formats. The attributes include the image format
300 % tag, a method to read and/or write the format, whether the format
301 % supports the saving of more than one frame to the same file or blob,
302 % whether the format supports native in-memory I/O, and a brief
303 % description of the format.
304 %
305 % The format of the RegisterSCTImage method is:
306 %
307 % size_t RegisterSCTImage(void)
308 %
309 */
RegisterSCTImage(void)310 ModuleExport size_t RegisterSCTImage(void)
311 {
312 MagickInfo
313 *entry;
314
315 entry=AcquireMagickInfo("SCT","SCT","Scitex HandShake");
316 entry->decoder=(DecodeImageHandler *) ReadSCTImage;
317 entry->magick=(IsImageFormatHandler *) IsSCT;
318 entry->flags^=CoderAdjoinFlag;
319 (void) RegisterMagickInfo(entry);
320 return(MagickImageCoderSignature);
321 }
322
323 /*
324 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
325 % %
326 % %
327 % %
328 % U n r e g i s t e r S C T I m a g e %
329 % %
330 % %
331 % %
332 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
333 %
334 % UnregisterSCTImage() removes format registrations made by the
335 % SCT module from the list of supported formats.
336 %
337 % The format of the UnregisterSCTImage method is:
338 %
339 % UnregisterSCTImage(void)
340 %
341 */
UnregisterSCTImage(void)342 ModuleExport void UnregisterSCTImage(void)
343 {
344 (void) UnregisterMagickInfo("SCT");
345 }
346