1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % M M TTTTT V V %
7 % MM MM T V V %
8 % M M M T V V %
9 % M M T V V %
10 % M M T V %
11 % %
12 % %
13 % Read/Write MTV Raytracer 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/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 WriteMTVImage(const ImageInfo *,Image *,ExceptionInfo *);
68
69 /*
70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
71 % %
72 % %
73 % %
74 % R e a d M T V I m a g e %
75 % %
76 % %
77 % %
78 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
79 %
80 % ReadMTVImage() reads a MTV image file and returns it. It allocates
81 % the memory necessary for the new Image structure and returns a pointer to
82 % the new image.
83 %
84 % The format of the ReadMTVImage method is:
85 %
86 % Image *ReadMTVImage(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 */
ReadMTVImage(const ImageInfo * image_info,ExceptionInfo * exception)95 static Image *ReadMTVImage(const ImageInfo *image_info,ExceptionInfo *exception)
96 {
97 char
98 buffer[MagickPathExtent];
99
100 Image
101 *image;
102
103 MagickBooleanType
104 status;
105
106 register ssize_t
107 x;
108
109 register Quantum
110 *q;
111
112 register unsigned char
113 *p;
114
115 ssize_t
116 count,
117 y;
118
119 unsigned char
120 *pixels;
121
122 unsigned long
123 columns,
124 rows;
125
126 /*
127 Open image file.
128 */
129 assert(image_info != (const ImageInfo *) NULL);
130 assert(image_info->signature == MagickCoreSignature);
131 if (image_info->debug != MagickFalse)
132 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
133 image_info->filename);
134 assert(exception != (ExceptionInfo *) NULL);
135 assert(exception->signature == MagickCoreSignature);
136 image=AcquireImage(image_info,exception);
137 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
138 if (status == MagickFalse)
139 {
140 image=DestroyImageList(image);
141 return((Image *) NULL);
142 }
143 /*
144 Read MTV image.
145 */
146 (void) ReadBlobString(image,buffer);
147 count=(ssize_t) sscanf(buffer,"%lu %lu\n",&columns,&rows);
148 if (count <= 0)
149 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
150 do
151 {
152 /*
153 Initialize image structure.
154 */
155 image->columns=columns;
156 image->rows=rows;
157 image->depth=8;
158 if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
159 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
160 break;
161 status=SetImageExtent(image,image->columns,image->rows,exception);
162 if (status == MagickFalse)
163 return(DestroyImageList(image));
164 /*
165 Convert MTV raster image to pixel packets.
166 */
167 pixels=(unsigned char *) AcquireQuantumMemory(image->columns,
168 3UL*sizeof(*pixels));
169 if (pixels == (unsigned char *) NULL)
170 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
171 for (y=0; y < (ssize_t) image->rows; y++)
172 {
173 count=(ssize_t) ReadBlob(image,(size_t) (3*image->columns),pixels);
174 if (count != (ssize_t) (3*image->columns))
175 ThrowReaderException(CorruptImageError,"UnableToReadImageData");
176 p=pixels;
177 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
178 if (q == (Quantum *) NULL)
179 break;
180 for (x=0; x < (ssize_t) image->columns; x++)
181 {
182 SetPixelRed(image,ScaleCharToQuantum(*p++),q);
183 SetPixelGreen(image,ScaleCharToQuantum(*p++),q);
184 SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
185 SetPixelAlpha(image,OpaqueAlpha,q);
186 q+=GetPixelChannels(image);
187 }
188 if (SyncAuthenticPixels(image,exception) == MagickFalse)
189 break;
190 if (image->previous == (Image *) NULL)
191 {
192 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
193 image->rows);
194 if (status == MagickFalse)
195 break;
196 }
197 }
198 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
199 if (EOFBlob(image) != MagickFalse)
200 {
201 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
202 image->filename);
203 break;
204 }
205 /*
206 Proceed to next image.
207 */
208 if (image_info->number_scenes != 0)
209 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
210 break;
211 *buffer='\0';
212 (void) ReadBlobString(image,buffer);
213 count=(ssize_t) sscanf(buffer,"%lu %lu\n",&columns,&rows);
214 if (count > 0)
215 {
216 /*
217 Allocate next image structure.
218 */
219 AcquireNextImage(image_info,image,exception);
220 if (GetNextImageInList(image) == (Image *) NULL)
221 {
222 image=DestroyImageList(image);
223 return((Image *) NULL);
224 }
225 image=SyncNextImageInList(image);
226 status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
227 GetBlobSize(image));
228 if (status == MagickFalse)
229 break;
230 }
231 } while (count > 0);
232 (void) CloseBlob(image);
233 return(GetFirstImageInList(image));
234 }
235
236 /*
237 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
238 % %
239 % %
240 % %
241 % R e g i s t e r M T V I m a g e %
242 % %
243 % %
244 % %
245 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
246 %
247 % RegisterMTVImage() adds attributes for the MTV image format to
248 % the list of supported formats. The attributes include the image format
249 % tag, a method to read and/or write the format, whether the format
250 % supports the saving of more than one frame to the same file or blob,
251 % whether the format supports native in-memory I/O, and a brief
252 % description of the format.
253 %
254 % The format of the RegisterMTVImage method is:
255 %
256 % size_t RegisterMTVImage(void)
257 %
258 */
RegisterMTVImage(void)259 ModuleExport size_t RegisterMTVImage(void)
260 {
261 MagickInfo
262 *entry;
263
264 entry=AcquireMagickInfo("MTV","MTV","MTV Raytracing image format");
265 entry->decoder=(DecodeImageHandler *) ReadMTVImage;
266 entry->encoder=(EncodeImageHandler *) WriteMTVImage;
267 (void) RegisterMagickInfo(entry);
268 return(MagickImageCoderSignature);
269 }
270
271 /*
272 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
273 % %
274 % %
275 % %
276 % U n r e g i s t e r M T V I m a g e %
277 % %
278 % %
279 % %
280 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
281 %
282 % UnregisterMTVImage() removes format registrations made by the
283 % MTV module from the list of supported formats.
284 %
285 % The format of the UnregisterMTVImage method is:
286 %
287 % UnregisterMTVImage(void)
288 %
289 */
UnregisterMTVImage(void)290 ModuleExport void UnregisterMTVImage(void)
291 {
292 (void) UnregisterMagickInfo("MTV");
293 }
294
295 /*
296 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
297 % %
298 % %
299 % %
300 % W r i t e M T V I m a g e %
301 % %
302 % %
303 % %
304 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
305 %
306 % WriteMTVImage() writes an image to a file in red, green, and blue MTV
307 % rasterfile format.
308 %
309 % The format of the WriteMTVImage method is:
310 %
311 % MagickBooleanType WriteMTVImage(const ImageInfo *image_info,
312 % Image *image,ExceptionInfo *exception)
313 %
314 % A description of each parameter follows.
315 %
316 % o image_info: the image info.
317 %
318 % o image: The image.
319 %
320 % o exception: return any errors or warnings in this structure.
321 %
322 */
WriteMTVImage(const ImageInfo * image_info,Image * image,ExceptionInfo * exception)323 static MagickBooleanType WriteMTVImage(const ImageInfo *image_info,Image *image,
324 ExceptionInfo *exception)
325 {
326 char
327 buffer[MagickPathExtent];
328
329 MagickBooleanType
330 status;
331
332 MagickOffsetType
333 scene;
334
335 register const Quantum
336 *p;
337
338 register ssize_t
339 x;
340
341 register unsigned char
342 *q;
343
344 ssize_t
345 y;
346
347 unsigned char
348 *pixels;
349
350 /*
351 Open output image file.
352 */
353 assert(image_info != (const ImageInfo *) NULL);
354 assert(image_info->signature == MagickCoreSignature);
355 assert(image != (Image *) NULL);
356 assert(image->signature == MagickCoreSignature);
357 if (image->debug != MagickFalse)
358 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
359 assert(exception != (ExceptionInfo *) NULL);
360 assert(exception->signature == MagickCoreSignature);
361 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
362 if (status == MagickFalse)
363 return(status);
364 scene=0;
365 do
366 {
367 /*
368 Allocate memory for pixels.
369 */
370 (void) TransformImageColorspace(image,sRGBColorspace,exception);
371 pixels=(unsigned char *) AcquireQuantumMemory(image->columns,
372 3UL*sizeof(*pixels));
373 if (pixels == (unsigned char *) NULL)
374 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
375 /*
376 Initialize raster file header.
377 */
378 (void) FormatLocaleString(buffer,MagickPathExtent,"%.20g %.20g\n",(double)
379 image->columns,(double) image->rows);
380 (void) WriteBlobString(image,buffer);
381 for (y=0; y < (ssize_t) image->rows; y++)
382 {
383 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
384 if (p == (const Quantum *) NULL)
385 break;
386 q=pixels;
387 for (x=0; x < (ssize_t) image->columns; x++)
388 {
389 *q++=ScaleQuantumToChar(GetPixelRed(image,p));
390 *q++=ScaleQuantumToChar(GetPixelGreen(image,p));
391 *q++=ScaleQuantumToChar(GetPixelBlue(image,p));
392 p+=GetPixelChannels(image);
393 }
394 (void) WriteBlob(image,(size_t) (q-pixels),pixels);
395 if (image->previous == (Image *) NULL)
396 {
397 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
398 image->rows);
399 if (status == MagickFalse)
400 break;
401 }
402 }
403 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
404 if (GetNextImageInList(image) == (Image *) NULL)
405 break;
406 image=SyncNextImageInList(image);
407 status=SetImageProgress(image,SaveImagesTag,scene,
408 GetImageListLength(image));
409 if (status == MagickFalse)
410 break;
411 scene++;
412 } while (image_info->adjoin != MagickFalse);
413 (void) CloseBlob(image);
414 return(MagickTrue);
415 }
416