1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % JJJ N N X X %
7 % J NN N X X %
8 % J N N N X %
9 % J J N NN X X %
10 % JJ N N X X %
11 % %
12 % %
13 % Read/Write Garmin Image Format %
14 % %
15 % Cristy %
16 % July 2012 %
17 % %
18 % %
19 % Copyright 1999-2016 ImageMagick Studio LLC, a non-profit organization %
20 % dedicated to making software imaging solutions freely available. %
21 % %
22 % You may not use this file except in compliance with the License. You may %
23 % obtain a copy of the License at %
24 % %
25 % http://www.imagemagick.org/script/license.php %
26 % %
27 % Unless required by applicable law or agreed to in writing, software %
28 % distributed under the License is distributed on an "AS IS" BASIS, %
29 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
30 % See the License for the specific language governing permissions and %
31 % limitations under the License. %
32 % %
33 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
34 %
35 %
36 */
37
38 /*
39 Include declarations.
40 */
41
42 /*
43 Include declarations.
44 */
45 #include "MagickCore/studio.h"
46 #include "MagickCore/blob.h"
47 #include "MagickCore/blob-private.h"
48 #include "MagickCore/cache.h"
49 #include "MagickCore/colorspace.h"
50 #include "MagickCore/colorspace-private.h"
51 #include "MagickCore/draw.h"
52 #include "MagickCore/exception.h"
53 #include "MagickCore/exception-private.h"
54 #include "MagickCore/image.h"
55 #include "MagickCore/image-private.h"
56 #include "MagickCore/list.h"
57 #include "MagickCore/magick.h"
58 #include "MagickCore/memory_.h"
59 #include "MagickCore/module.h"
60 #include "MagickCore/monitor.h"
61 #include "MagickCore/monitor-private.h"
62 #include "MagickCore/property.h"
63 #include "MagickCore/pixel-accessor.h"
64 #include "MagickCore/quantum-private.h"
65 #include "MagickCore/static.h"
66 #include "MagickCore/string_.h"
67
68 typedef struct _JNXInfo
69 {
70 int
71 version,
72 serial;
73
74 PointInfo
75 northeast,
76 southwest;
77
78 int
79 levels,
80 expire,
81 id,
82 crc,
83 signature;
84
85 unsigned int
86 offset;
87
88 int
89 order;
90 } JNXInfo;
91
92 typedef struct _JNXLevelInfo
93 {
94 int
95 count,
96 offset;
97
98 unsigned int
99 scale;
100
101 unsigned short
102 copyright[MagickPathExtent];
103 } JNXLevelInfo;
104
105 /*
106 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
107 % %
108 % %
109 % %
110 % R e a d J N X I m a g e %
111 % %
112 % %
113 % %
114 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
115 %
116 % ReadJNXImage() reads an image in the Garmin tile storage format and returns
117 % it. It allocates the memory necessary for the new Image structure and
118 % returns a pointer to the new image.
119 %
120 % The format of the ReadJNXImage method is:
121 %
122 % Image *ReadJNXImage(const ImageInfo *image_info,ExceptionInfo *exception)
123 %
124 % A description of each parameter follows:
125 %
126 % o image_info: the image info.
127 %
128 % o exception: return any errors or warnings in this structure.
129 %
130 */
ReadJNXImage(const ImageInfo * image_info,ExceptionInfo * exception)131 static Image *ReadJNXImage(const ImageInfo *image_info,ExceptionInfo *exception)
132 {
133 #define JNXMaxLevels 20
134
135 Image
136 *image,
137 *images;
138
139 JNXInfo
140 jnx_info;
141
142 JNXLevelInfo
143 jnx_level_info[JNXMaxLevels];
144
145 MagickBooleanType
146 status;
147
148 register ssize_t
149 i;
150
151 /*
152 Open image file.
153 */
154 assert(image_info != (const ImageInfo *) NULL);
155 assert(image_info->signature == MagickCoreSignature);
156 if (image_info->debug != MagickFalse)
157 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
158 image_info->filename);
159 assert(exception != (ExceptionInfo *) NULL);
160 assert(exception->signature == MagickCoreSignature);
161 image=AcquireImage(image_info,exception);
162 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
163 if (status == MagickFalse)
164 {
165 image=DestroyImageList(image);
166 return((Image *) NULL);
167 }
168 /*
169 Read JNX header.
170 */
171 (void) ResetMagickMemory(&jnx_info,0,sizeof(jnx_info));
172 jnx_info.version=ReadBlobLSBSignedLong(image);
173 if ((jnx_info.version != 3) && (jnx_info.version != 4))
174 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
175 jnx_info.serial=ReadBlobLSBSignedLong(image);
176 jnx_info.northeast.x=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
177 jnx_info.northeast.y=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
178 jnx_info.southwest.x=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
179 jnx_info.southwest.y=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
180 jnx_info.levels=ReadBlobLSBSignedLong(image);
181 if (jnx_info.levels > JNXMaxLevels)
182 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
183 jnx_info.expire=ReadBlobLSBSignedLong(image);
184 jnx_info.id=ReadBlobLSBSignedLong(image);
185 jnx_info.crc=ReadBlobLSBSignedLong(image);
186 jnx_info.signature=ReadBlobLSBSignedLong(image);
187 jnx_info.offset=ReadBlobLSBLong(image);
188 if (jnx_info.version > 3)
189 jnx_info.order=ReadBlobLSBSignedLong(image);
190 else
191 if (jnx_info.version == 3)
192 jnx_info.order=30;
193 /*
194 Read JNX levels.
195 */
196 (void) ResetMagickMemory(&jnx_level_info,0,sizeof(jnx_level_info));
197 for (i=0; i < (ssize_t) jnx_info.levels; i++)
198 {
199 jnx_level_info[i].count=ReadBlobLSBSignedLong(image);
200 if (jnx_level_info[i].count > 50000)
201 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
202 jnx_level_info[i].offset=ReadBlobLSBSignedLong(image);
203 jnx_level_info[i].scale=ReadBlobLSBLong(image);
204 if (jnx_info.version > 3)
205 {
206 register ssize_t
207 j;
208
209 unsigned short
210 c;
211
212 (void) ReadBlobLSBLong(image);
213 j=0;
214 while ((c=ReadBlobLSBShort(image)) != 0)
215 if (j < (MagickPathExtent-1))
216 jnx_level_info[i].copyright[j++]=c;
217 jnx_level_info[i].copyright[j]=0;
218 }
219 }
220 /*
221 Read JNX tiles.
222 */
223 images=NewImageList();
224 for (i=0; i < (ssize_t) jnx_info.levels; i++)
225 {
226 MagickOffsetType
227 offset;
228
229 register ssize_t
230 j;
231
232 offset=SeekBlob(image,(MagickOffsetType) jnx_level_info[i].offset,SEEK_SET);
233 if (offset != (MagickOffsetType) jnx_level_info[i].offset)
234 continue;
235 for (j=0; j < (ssize_t) jnx_level_info[i].count; j++)
236 {
237 Image
238 *tile_image;
239
240 ImageInfo
241 *read_info;
242
243 int
244 tile_offset;
245
246 MagickOffsetType
247 restore_offset;
248
249 PointInfo
250 northeast,
251 southwest;
252
253 ssize_t
254 count;
255
256 unsigned char
257 *blob;
258
259 unsigned int
260 tile_length;
261
262 northeast.x=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
263 northeast.y=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
264 southwest.x=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
265 southwest.y=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
266 (void) ReadBlobLSBShort(image); /* width */
267 (void) ReadBlobLSBShort(image); /* height */
268 tile_length=ReadBlobLSBLong(image);
269 tile_offset=ReadBlobLSBSignedLong(image);
270 if (tile_offset == -1)
271 continue;
272 restore_offset=TellBlob(image);
273 if (restore_offset < 0)
274 continue;
275 offset=SeekBlob(image,(MagickOffsetType) tile_offset,SEEK_SET);
276 if (offset != (MagickOffsetType) tile_offset)
277 continue;
278 /*
279 Read a tile.
280 */
281 blob=(unsigned char *) AcquireQuantumMemory((size_t) tile_length+2,
282 sizeof(*blob));
283 if (blob == (unsigned char *) NULL)
284 {
285 if (images != (Image *) NULL)
286 images=DestroyImageList(images);
287 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
288 }
289 blob[0]=0xFF;
290 blob[1]=0xD8;
291 count=ReadBlob(image,tile_length,blob+2);
292 if (count != (ssize_t) tile_length)
293 {
294 if (images != (Image *) NULL)
295 images=DestroyImageList(images);
296 blob=(unsigned char *) RelinquishMagickMemory(blob);
297 ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
298 }
299 read_info=CloneImageInfo(image_info);
300 (void) CopyMagickString(read_info->magick,"JPEG",MagickPathExtent);
301 tile_image=BlobToImage(read_info,blob,tile_length+2,exception);
302 read_info=DestroyImageInfo(read_info);
303 blob=(unsigned char *) RelinquishMagickMemory(blob);
304 offset=SeekBlob(image,restore_offset,SEEK_SET);
305 if (tile_image == (Image *) NULL)
306 continue;
307 (void) CopyMagickString(tile_image->magick,image->magick,MagickPathExtent);
308 (void) FormatImageProperty(tile_image,"jnx:northeast","%.20g,%.20g",
309 northeast.x,northeast.y);
310 (void) FormatImageProperty(tile_image,"jnx:southwest","%.20g,%.20g",
311 southwest.x,southwest.y);
312 AppendImageToList(&images,tile_image);
313 }
314 if (image->progress_monitor != (MagickProgressMonitor) NULL)
315 {
316 MagickBooleanType
317 proceed;
318
319 proceed=SetImageProgress(image,LoadImageTag,(MagickOffsetType) i,
320 (MagickSizeType) jnx_info.levels);
321 if (proceed == MagickFalse)
322 status=MagickFalse;
323 }
324 }
325 (void) CloseBlob(image);
326 image=DestroyImage(image);
327 if (images == (Image *) NULL)
328 return((Image *) NULL);
329 return(GetFirstImageInList(images));
330 }
331
332 /*
333 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
334 % %
335 % %
336 % %
337 % R e g i s t e r J N X I m a g e %
338 % %
339 % %
340 % %
341 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
342 %
343 % RegisterJNXImage() adds attributes for the JNX image format to the list
344 % of supported formats. The attributes include the image format tag, a
345 % method to read and/or write the format, whether the format supports the
346 % saving of more than one frame to the same file or blob, whether the format
347 % supports native in-memory I/O, and a brief description of the format.
348 %
349 % The format of the RegisterJNXImage method is:
350 %
351 % size_t RegisterJNXImage(void)
352 %
353 */
RegisterJNXImage(void)354 ModuleExport size_t RegisterJNXImage(void)
355 {
356 MagickInfo
357 *entry;
358
359 entry=AcquireMagickInfo("JNX","JNX","Garmin tile format");
360 entry->decoder=(DecodeImageHandler *) ReadJNXImage;
361 entry->flags|=CoderSeekableStreamFlag;
362 (void) RegisterMagickInfo(entry);
363 return(MagickImageCoderSignature);
364 }
365
366 /*
367 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
368 % %
369 % %
370 % %
371 % U n r e g i s t e r J N X I m a g e %
372 % %
373 % %
374 % %
375 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
376 %
377 % UnregisterJNXImage() removes format registrations made by the
378 % JNX module from the list of supported formats.
379 %
380 % The format of the UnregisterJNXImage method is:
381 %
382 % UnregisterJNXImage(void)
383 %
384 */
UnregisterJNXImage(void)385 ModuleExport void UnregisterJNXImage(void)
386 {
387 (void) UnregisterMagickInfo("JNX");
388 }
389