1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % H H RRRR ZZZZZ %
7 % H H R R ZZ %
8 % HHHHH RRRR Z %
9 % H H R R ZZ %
10 % H H R R ZZZZZ %
11 % %
12 % %
13 % Read/Write Slow Scan TeleVision Image Format %
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/colorspace.h"
47 #include "MagickCore/colorspace-private.h"
48 #include "MagickCore/exception.h"
49 #include "MagickCore/exception-private.h"
50 #include "MagickCore/image.h"
51 #include "MagickCore/image-private.h"
52 #include "MagickCore/list.h"
53 #include "MagickCore/magick.h"
54 #include "MagickCore/memory_.h"
55 #include "MagickCore/monitor.h"
56 #include "MagickCore/monitor-private.h"
57 #include "MagickCore/pixel-accessor.h"
58 #include "MagickCore/quantum-private.h"
59 #include "MagickCore/static.h"
60 #include "MagickCore/string_.h"
61 #include "MagickCore/module.h"
62
63 /*
64 Forward declarations.
65 */
66 static MagickBooleanType
67 WriteHRZImage(const ImageInfo *,Image *,ExceptionInfo *);
68
69 /*
70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
71 % %
72 % %
73 % %
74 % R e a d H R Z I m a g e %
75 % %
76 % %
77 % %
78 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
79 %
80 % ReadHRZImage() reads a Slow Scan TeleVision image file and returns it. It
81 % allocates the memory necessary for the new Image structure and returns a
82 % pointer to the new image.
83 %
84 % The format of the ReadHRZImage method is:
85 %
86 % Image *ReadHRZImage(const ImageInfo *image_info,ExceptionInfo *exception)
87 %
88 % A description of each parameter follows:
89 %
90 % o image_info: the image info.
91 %
92 % o exception: return any errors or warnings in this structure.
93 %
94 */
ReadHRZImage(const ImageInfo * image_info,ExceptionInfo * exception)95 static Image *ReadHRZImage(const ImageInfo *image_info,ExceptionInfo *exception)
96 {
97 Image
98 *image;
99
100 MagickBooleanType
101 status;
102
103 ssize_t
104 x;
105
106 Quantum
107 *q;
108
109 unsigned char
110 *p;
111
112 ssize_t
113 count,
114 y;
115
116 size_t
117 length;
118
119 unsigned char
120 *pixels;
121
122 /*
123 Open image file.
124 */
125 assert(image_info != (const ImageInfo *) NULL);
126 assert(image_info->signature == MagickCoreSignature);
127 if (image_info->debug != MagickFalse)
128 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
129 image_info->filename);
130 assert(exception != (ExceptionInfo *) NULL);
131 assert(exception->signature == MagickCoreSignature);
132 image=AcquireImage(image_info,exception);
133 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
134 if (status == MagickFalse)
135 {
136 image=DestroyImageList(image);
137 return((Image *) NULL);
138 }
139 /*
140 Convert HRZ raster image to pixel packets.
141 */
142 image->columns=256;
143 image->rows=240;
144 image->depth=8;
145 status=SetImageExtent(image,image->columns,image->rows,exception);
146 if (status == MagickFalse)
147 return(DestroyImageList(image));
148 pixels=(unsigned char *) AcquireQuantumMemory(image->columns,3*
149 sizeof(*pixels));
150 if (pixels == (unsigned char *) NULL)
151 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
152 length=(size_t) (3*image->columns);
153 for (y=0; y < (ssize_t) image->rows; y++)
154 {
155 count=ReadBlob(image,length,pixels);
156 if ((size_t) count != length)
157 {
158 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
159 ThrowReaderException(CorruptImageError,"UnableToReadImageData");
160 }
161 p=pixels;
162 q=QueueAuthenticPixels(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 SetPixelRed(image,ScaleCharToQuantum(4**p++),q);
168 SetPixelGreen(image,ScaleCharToQuantum(4**p++),q);
169 SetPixelBlue(image,ScaleCharToQuantum(4**p++),q);
170 SetPixelAlpha(image,OpaqueAlpha,q);
171 q+=GetPixelChannels(image);
172 }
173 if (SyncAuthenticPixels(image,exception) == MagickFalse)
174 break;
175 if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
176 break;
177 }
178 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
179 if (EOFBlob(image) != MagickFalse)
180 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
181 image->filename);
182 (void) CloseBlob(image);
183 return(GetFirstImageInList(image));
184 }
185
186 /*
187 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
188 % %
189 % %
190 % %
191 % R e g i s t e r H R Z I m a g e %
192 % %
193 % %
194 % %
195 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
196 %
197 % RegisterHRZImage() adds attributes for the HRZ X image format to the list
198 % of supported formats. The attributes include the image format tag, a
199 % method to read and/or write the format, whether the format supports the
200 % saving of more than one frame to the same file or blob, whether the format
201 % supports native in-memory I/O, and a brief description of the format.
202 %
203 % The format of the RegisterHRZImage method is:
204 %
205 % size_t RegisterHRZImage(void)
206 %
207 */
RegisterHRZImage(void)208 ModuleExport size_t RegisterHRZImage(void)
209 {
210 MagickInfo
211 *entry;
212
213 entry=AcquireMagickInfo("HRZ","HRZ","Slow Scan TeleVision");
214 entry->decoder=(DecodeImageHandler *) ReadHRZImage;
215 entry->encoder=(EncodeImageHandler *) WriteHRZImage;
216 entry->flags^=CoderAdjoinFlag;
217 (void) RegisterMagickInfo(entry);
218 return(MagickImageCoderSignature);
219 }
220
221 /*
222 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
223 % %
224 % %
225 % %
226 % U n r e g i s t e r H R Z I m a g e %
227 % %
228 % %
229 % %
230 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
231 %
232 % UnregisterHRZImage() removes format registrations made by the
233 % HRZ module from the list of supported formats.
234 %
235 % The format of the UnregisterHRZImage method is:
236 %
237 % UnregisterHRZImage(void)
238 %
239 */
UnregisterHRZImage(void)240 ModuleExport void UnregisterHRZImage(void)
241 {
242 (void) UnregisterMagickInfo("HRZ");
243 }
244
245 /*
246 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
247 % %
248 % %
249 % %
250 % W r i t e H R Z I m a g e %
251 % %
252 % %
253 % %
254 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
255 %
256 % WriteHRZImage() writes an image to a file in HRZ X image format.
257 %
258 % The format of the WriteHRZImage method is:
259 %
260 % MagickBooleanType WriteHRZImage(const ImageInfo *image_info,
261 % Image *image,ExceptionInfo *exception)
262 %
263 % A description of each parameter follows.
264 %
265 % o image_info: the image info.
266 %
267 % o image: The image.
268 %
269 % o exception: return any errors or warnings in this structure.
270 %
271 */
WriteHRZImage(const ImageInfo * image_info,Image * image,ExceptionInfo * exception)272 static MagickBooleanType WriteHRZImage(const ImageInfo *image_info,Image *image,
273 ExceptionInfo *exception)
274 {
275 Image
276 *hrz_image;
277
278 MagickBooleanType
279 status;
280
281 const Quantum
282 *p;
283
284 ssize_t
285 x,
286 y;
287
288 unsigned char
289 *q;
290
291 ssize_t
292 count;
293
294 unsigned char
295 *pixels;
296
297 /*
298 Open output image file.
299 */
300 assert(image_info != (const ImageInfo *) NULL);
301 assert(image_info->signature == MagickCoreSignature);
302 assert(image != (Image *) NULL);
303 assert(image->signature == MagickCoreSignature);
304 if (image->debug != MagickFalse)
305 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
306 assert(exception != (ExceptionInfo *) NULL);
307 assert(exception->signature == MagickCoreSignature);
308 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
309 if (status == MagickFalse)
310 return(status);
311 hrz_image=ResizeImage(image,256,240,image->filter,exception);
312 if (hrz_image == (Image *) NULL)
313 return(MagickFalse);
314 (void) TransformImageColorspace(hrz_image,sRGBColorspace,exception);
315 /*
316 Allocate memory for pixels.
317 */
318 pixels=(unsigned char *) AcquireQuantumMemory((size_t) hrz_image->columns,
319 3*sizeof(*pixels));
320 if (pixels == (unsigned char *) NULL)
321 {
322 hrz_image=DestroyImage(hrz_image);
323 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
324 }
325 /*
326 Convert MIFF to HRZ raster pixels.
327 */
328 for (y=0; y < (ssize_t) hrz_image->rows; y++)
329 {
330 p=GetVirtualPixels(hrz_image,0,y,hrz_image->columns,1,exception);
331 if (p == (const Quantum *) NULL)
332 break;
333 q=pixels;
334 for (x=0; x < (ssize_t) hrz_image->columns; x++)
335 {
336 *q++=ScaleQuantumToChar(GetPixelRed(hrz_image,p)/4);
337 *q++=ScaleQuantumToChar(GetPixelGreen(hrz_image,p)/4);
338 *q++=ScaleQuantumToChar(GetPixelBlue(hrz_image,p)/4);
339 p+=GetPixelChannels(hrz_image);
340 }
341 count=WriteBlob(image,(size_t) (q-pixels),pixels);
342 if (count != (ssize_t) (q-pixels))
343 break;
344 status=SetImageProgress(image,SaveImageTag,y,hrz_image->rows);
345 if (status == MagickFalse)
346 break;
347 }
348 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
349 hrz_image=DestroyImage(hrz_image);
350 (void) CloseBlob(image);
351 return(MagickTrue);
352 }
353