1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % PPPP AAA L M M %
7 % P P A A L MM MM %
8 % PPPP AAAAA L M M M %
9 % P A A L M M %
10 % P A A LLLLL M M %
11 % %
12 % %
13 % Read/Write Palm Pixmap. %
14 % %
15 % %
16 % Software Design %
17 % Christopher R. Hawks %
18 % December 2001 %
19 % %
20 % Copyright 1999-2004 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 % Based on pnmtopalm by Bill Janssen and ppmtobmp by Ian Goldberg.
38 %
39 */
40
41 /*
42 Include declarations.
43 */
44 #include "MagickCore/studio.h"
45 #include "MagickCore/attribute.h"
46 #include "MagickCore/blob.h"
47 #include "MagickCore/blob-private.h"
48 #include "MagickCore/cache.h"
49 #include "MagickCore/color.h"
50 #include "MagickCore/colormap.h"
51 #include "MagickCore/colormap-private.h"
52 #include "MagickCore/color-private.h"
53 #include "MagickCore/colorspace.h"
54 #include "MagickCore/colorspace-private.h"
55 #include "MagickCore/constitute.h"
56 #include "MagickCore/exception.h"
57 #include "MagickCore/histogram.h"
58 #include "MagickCore/image.h"
59 #include "MagickCore/image-private.h"
60 #include "MagickCore/list.h"
61 #include "MagickCore/magick.h"
62 #include "MagickCore/memory_.h"
63 #include "MagickCore/monitor.h"
64 #include "MagickCore/monitor-private.h"
65 #include "MagickCore/paint.h"
66 #include "MagickCore/pixel-accessor.h"
67 #include "MagickCore/property.h"
68 #include "MagickCore/quantize.h"
69 #include "MagickCore/quantum-private.h"
70 #include "MagickCore/static.h"
71 #include "MagickCore/string_.h"
72 #include "MagickCore/module.h"
73 #include "MagickCore/utility.h"
74
75 /*
76 Define declarations.
77 */
78 #define PALM_IS_COMPRESSED_FLAG 0x8000
79 #define PALM_HAS_COLORMAP_FLAG 0x4000
80 #define PALM_HAS_FOUR_BYTE_FIELD 0x0200
81 #define PALM_HAS_TRANSPARENCY_FLAG 0x2000
82 #define PALM_IS_INDIRECT 0x1000
83 #define PALM_IS_FOR_SCREEN 0x0800
84 #define PALM_IS_DIRECT_COLOR 0x0400
85 #define PALM_COMPRESSION_SCANLINE 0x00
86 #define PALM_COMPRESSION_RLE 0x01
87 #define PALM_COMPRESSION_NONE 0xFF
88
89 /*
90 The 256 color system palette for Palm Computing Devices.
91 */
92 static const unsigned char
93 PalmPalette[256][3] =
94 {
95 {255, 255,255}, {255, 204,255}, {255, 153,255}, {255, 102,255},
96 {255, 51,255}, {255, 0,255}, {255, 255,204}, {255, 204,204},
97 {255, 153,204}, {255, 102,204}, {255, 51,204}, {255, 0,204},
98 {255, 255,153}, {255, 204,153}, {255, 153,153}, {255, 102,153},
99 {255, 51,153}, {255, 0,153}, {204, 255,255}, {204, 204,255},
100 {204, 153,255}, {204, 102,255}, {204, 51,255}, {204, 0,255},
101 {204, 255,204}, {204, 204,204}, {204, 153,204}, {204, 102,204},
102 {204, 51,204}, {204, 0,204}, {204, 255,153}, {204, 204,153},
103 {204, 153,153}, {204, 102,153}, {204, 51,153}, {204, 0,153},
104 {153, 255,255}, {153, 204,255}, {153, 153,255}, {153, 102,255},
105 {153, 51,255}, {153, 0,255}, {153, 255,204}, {153, 204,204},
106 {153, 153,204}, {153, 102,204}, {153, 51,204}, {153, 0,204},
107 {153, 255,153}, {153, 204,153}, {153, 153,153}, {153, 102,153},
108 {153, 51,153}, {153, 0,153}, {102, 255,255}, {102, 204,255},
109 {102, 153,255}, {102, 102,255}, {102, 51,255}, {102, 0,255},
110 {102, 255,204}, {102, 204,204}, {102, 153,204}, {102, 102,204},
111 {102, 51,204}, {102, 0,204}, {102, 255,153}, {102, 204,153},
112 {102, 153,153}, {102, 102,153}, {102, 51,153}, {102, 0,153},
113 { 51, 255,255}, { 51, 204,255}, { 51, 153,255}, { 51, 102,255},
114 { 51, 51,255}, { 51, 0,255}, { 51, 255,204}, { 51, 204,204},
115 { 51, 153,204}, { 51, 102,204}, { 51, 51,204}, { 51, 0,204},
116 { 51, 255,153}, { 51, 204,153}, { 51, 153,153}, { 51, 102,153},
117 { 51, 51,153}, { 51, 0,153}, { 0, 255,255}, { 0, 204,255},
118 { 0, 153,255}, { 0, 102,255}, { 0, 51,255}, { 0, 0,255},
119 { 0, 255,204}, { 0, 204,204}, { 0, 153,204}, { 0, 102,204},
120 { 0, 51,204}, { 0, 0,204}, { 0, 255,153}, { 0, 204,153},
121 { 0, 153,153}, { 0, 102,153}, { 0, 51,153}, { 0, 0,153},
122 {255, 255,102}, {255, 204,102}, {255, 153,102}, {255, 102,102},
123 {255, 51,102}, {255, 0,102}, {255, 255, 51}, {255, 204, 51},
124 {255, 153, 51}, {255, 102, 51}, {255, 51, 51}, {255, 0, 51},
125 {255, 255, 0}, {255, 204, 0}, {255, 153, 0}, {255, 102, 0},
126 {255, 51, 0}, {255, 0, 0}, {204, 255,102}, {204, 204,102},
127 {204, 153,102}, {204, 102,102}, {204, 51,102}, {204, 0,102},
128 {204, 255, 51}, {204, 204, 51}, {204, 153, 51}, {204, 102, 51},
129 {204, 51, 51}, {204, 0, 51}, {204, 255, 0}, {204, 204, 0},
130 {204, 153, 0}, {204, 102, 0}, {204, 51, 0}, {204, 0, 0},
131 {153, 255,102}, {153, 204,102}, {153, 153,102}, {153, 102,102},
132 {153, 51,102}, {153, 0,102}, {153, 255, 51}, {153, 204, 51},
133 {153, 153, 51}, {153, 102, 51}, {153, 51, 51}, {153, 0, 51},
134 {153, 255, 0}, {153, 204, 0}, {153, 153, 0}, {153, 102, 0},
135 {153, 51, 0}, {153, 0, 0}, {102, 255,102}, {102, 204,102},
136 {102, 153,102}, {102, 102,102}, {102, 51,102}, {102, 0,102},
137 {102, 255, 51}, {102, 204, 51}, {102, 153, 51}, {102, 102, 51},
138 {102, 51, 51}, {102, 0, 51}, {102, 255, 0}, {102, 204, 0},
139 {102, 153, 0}, {102, 102, 0}, {102, 51, 0}, {102, 0, 0},
140 { 51, 255,102}, { 51, 204,102}, { 51, 153,102}, { 51, 102,102},
141 { 51, 51,102}, { 51, 0,102}, { 51, 255, 51}, { 51, 204, 51},
142 { 51, 153, 51}, { 51, 102, 51}, { 51, 51, 51}, { 51, 0, 51},
143 { 51, 255, 0}, { 51, 204, 0}, { 51, 153, 0}, { 51, 102, 0},
144 { 51, 51, 0}, { 51, 0, 0}, { 0, 255,102}, { 0, 204,102},
145 { 0, 153,102}, { 0, 102,102}, { 0, 51,102}, { 0, 0,102},
146 { 0, 255, 51}, { 0, 204, 51}, { 0, 153, 51}, { 0, 102, 51},
147 { 0, 51, 51}, { 0, 0, 51}, { 0, 255, 0}, { 0, 204, 0},
148 { 0, 153, 0}, { 0, 102, 0}, { 0, 51, 0}, { 17, 17, 17},
149 { 34, 34, 34}, { 68, 68, 68}, { 85, 85, 85}, {119, 119,119},
150 {136, 136,136}, {170, 170,170}, {187, 187,187}, {221, 221,221},
151 {238, 238,238}, {192, 192,192}, {128, 0, 0}, {128, 0,128},
152 { 0, 128, 0}, { 0, 128,128}, { 0, 0, 0}, { 0, 0, 0},
153 { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0},
154 { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0},
155 { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0},
156 { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0},
157 { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0},
158 { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}
159 };
160
161 /*
162 Forward declarations.
163 */
164 static MagickBooleanType
165 WritePALMImage(const ImageInfo *,Image *,ExceptionInfo *);
166
167 /*
168 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
169 % %
170 % %
171 % %
172 % F i n d C o l o r %
173 % %
174 % %
175 % %
176 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
177 %
178 % FindColor() returns the index of the matching entry from PalmPalette for a
179 % given PixelInfo.
180 %
181 % The format of the FindColor method is:
182 %
183 % int FindColor(PixelInfo *pixel)
184 %
185 % A description of each parameter follows:
186 %
187 % o int: the index of the matching color or -1 if not found/
188 %
189 % o pixel: a pointer to the PixelInfo to be matched.
190 %
191 */
FindColor(PixelInfo * packet)192 static ssize_t FindColor(PixelInfo *packet)
193 {
194 ssize_t
195 i;
196
197 for (i=0; i < 256; i++)
198 if (ScaleQuantumToChar(ClampToQuantum(packet->red)) == PalmPalette[i][0] &&
199 ScaleQuantumToChar(ClampToQuantum(packet->green)) == PalmPalette[i][1] &&
200 ScaleQuantumToChar(ClampToQuantum(packet->blue)) == PalmPalette[i][2])
201 return(i);
202 return(-1);
203 }
204
205 /*
206 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
207 % %
208 % %
209 % %
210 % R e a d P A L M I m a g e %
211 % %
212 % %
213 % %
214 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
215 %
216 % ReadPALMImage() reads an image of raw bites in LSB order and returns it. It
217 % allocates the memory necessary for the new Image structure and returns a
218 % pointer to the new image.
219 %
220 % The format of the ReadPALMImage method is:
221 %
222 % Image *ReadPALMImage(const ImageInfo *image_info,
223 % ExceptionInfo *exception)
224 %
225 % A description of each parameter follows:
226 %
227 % o image_info: Specifies a pointer to an ImageInfo structure.
228 %
229 % o exception: return any errors or warnings in this structure.
230 %
231 */
ReadPALMImage(const ImageInfo * image_info,ExceptionInfo * exception)232 static Image *ReadPALMImage(const ImageInfo *image_info,
233 ExceptionInfo *exception)
234 {
235 Image
236 *image;
237
238 MagickBooleanType
239 status;
240
241 MagickOffsetType
242 totalOffset,
243 seekNextDepth;
244
245 PixelInfo
246 transpix;
247
248 Quantum
249 index;
250
251 ssize_t
252 i,
253 x;
254
255 Quantum
256 *q;
257
258 size_t
259 bits_per_pixel,
260 bytes_per_row,
261 flags,
262 extent,
263 version,
264 nextDepthOffset,
265 transparentIndex,
266 compressionType,
267 byte,
268 mask,
269 redbits,
270 greenbits,
271 bluebits,
272 one,
273 pad,
274 size,
275 bit;
276
277 ssize_t
278 count,
279 y;
280
281 unsigned char
282 *last_row,
283 *one_row,
284 *ptr;
285
286 unsigned short
287 color16;
288
289 /*
290 Open image file.
291 */
292 assert(image_info != (const ImageInfo *) NULL);
293 assert(image_info->signature == MagickCoreSignature);
294 if (image_info->debug != MagickFalse)
295 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
296 image_info->filename);
297 assert(exception != (ExceptionInfo *) NULL);
298 assert(exception->signature == MagickCoreSignature);
299 image=AcquireImage(image_info,exception);
300 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
301 if (status == MagickFalse)
302 {
303 (void) DestroyImageList(image);
304 return((Image *) NULL);
305 }
306 totalOffset=0;
307 do
308 {
309 image->columns=ReadBlobMSBShort(image);
310 image->rows=ReadBlobMSBShort(image);
311 if (EOFBlob(image) != MagickFalse)
312 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
313 if ((image->columns == 0) || (image->rows == 0))
314 ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
315 status=SetImageExtent(image,image->columns,image->rows,exception);
316 if (status == MagickFalse)
317 return(DestroyImageList(image));
318 (void) SetImageBackgroundColor(image,exception);
319 bytes_per_row=ReadBlobMSBShort(image);
320 flags=ReadBlobMSBShort(image);
321 bits_per_pixel=(size_t) ReadBlobByte(image);
322 if ((bits_per_pixel != 1) && (bits_per_pixel != 2) &&
323 (bits_per_pixel != 4) && (bits_per_pixel != 8) &&
324 (bits_per_pixel != 16))
325 ThrowReaderException(CorruptImageError,"UnsupportedBitsPerPixel");
326 version=(size_t) ReadBlobByte(image);
327 if ((version != 0) && (version != 1) && (version != 2))
328 ThrowReaderException(CorruptImageError,"FileFormatVersionMismatch");
329 nextDepthOffset=(size_t) ReadBlobMSBShort(image);
330 transparentIndex=(size_t) ReadBlobByte(image);
331 compressionType=(size_t) ReadBlobByte(image);
332 if ((compressionType != PALM_COMPRESSION_NONE) &&
333 (compressionType != PALM_COMPRESSION_SCANLINE ) &&
334 (compressionType != PALM_COMPRESSION_RLE))
335 ThrowReaderException(CorruptImageError,"UnrecognizedImageCompression");
336 pad=ReadBlobMSBShort(image);
337 (void) pad;
338 /*
339 Initialize image colormap.
340 */
341 one=1;
342 if ((bits_per_pixel < 16) &&
343 (AcquireImageColormap(image,one << bits_per_pixel,exception) == MagickFalse))
344 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
345 GetPixelInfo(image,&transpix);
346 if (bits_per_pixel == 16) /* Direct Color */
347 {
348 redbits=(size_t) ReadBlobByte(image); /* # of bits of red */
349 (void) redbits;
350 greenbits=(size_t) ReadBlobByte(image); /* # of bits of green */
351 (void) greenbits;
352 bluebits=(size_t) ReadBlobByte(image); /* # of bits of blue */
353 (void) bluebits;
354 ReadBlobByte(image); /* reserved by Palm */
355 ReadBlobByte(image); /* reserved by Palm */
356 transpix.red=(double) (QuantumRange*ReadBlobByte(image)/31);
357 transpix.green=(double) (QuantumRange*ReadBlobByte(image)/63);
358 transpix.blue=(double) (QuantumRange*ReadBlobByte(image)/31);
359 }
360 if (bits_per_pixel == 8)
361 {
362 ssize_t
363 index;
364
365 if (flags & PALM_HAS_COLORMAP_FLAG)
366 {
367 count=(ssize_t) ReadBlobMSBShort(image);
368 for (i=0; i < (ssize_t) count; i++)
369 {
370 ReadBlobByte(image);
371 index=ConstrainColormapIndex(image,255-i,exception);
372 image->colormap[index].red=(MagickRealType)
373 ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
374 image->colormap[index].green=(MagickRealType)
375 ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
376 image->colormap[index].blue=(MagickRealType)
377 ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
378 }
379 }
380 else
381 for (i=0; i < (ssize_t) (1L << bits_per_pixel); i++)
382 {
383 index=ConstrainColormapIndex(image,255-i,exception);
384 image->colormap[index].red=(MagickRealType)
385 ScaleCharToQuantum(PalmPalette[i][0]);
386 image->colormap[index].green=(MagickRealType)
387 ScaleCharToQuantum(PalmPalette[i][1]);
388 image->colormap[index].blue=(MagickRealType)
389 ScaleCharToQuantum(PalmPalette[i][2]);
390 }
391 }
392 if (flags & PALM_IS_COMPRESSED_FLAG)
393 size=ReadBlobMSBShort(image);
394 (void) size;
395 image->storage_class=DirectClass;
396 if (bits_per_pixel < 16)
397 {
398 image->storage_class=PseudoClass;
399 image->depth=8;
400 }
401 if (image_info->ping != MagickFalse)
402 {
403 (void) CloseBlob(image);
404 return(image);
405 }
406 status=SetImageExtent(image,image->columns,image->rows,exception);
407 if (status == MagickFalse)
408 return(DestroyImageList(image));
409 extent=MagickMax(bytes_per_row,2*image->columns);
410 one_row=(unsigned char *) AcquireQuantumMemory(extent,sizeof(*one_row));
411 if (one_row == (unsigned char *) NULL)
412 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
413 (void) memset(one_row,0,extent*sizeof(*one_row));
414 last_row=(unsigned char *) NULL;
415 if (compressionType == PALM_COMPRESSION_SCANLINE)
416 {
417 last_row=(unsigned char *) AcquireQuantumMemory(MagickMax(bytes_per_row,
418 2*image->columns),sizeof(*last_row));
419 if (last_row == (unsigned char *) NULL)
420 {
421 one_row=(unsigned char *) RelinquishMagickMemory(one_row);
422 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
423 }
424 (void) memset(last_row,0,MagickMax(bytes_per_row,2*image->columns)*
425 sizeof(*last_row));
426 }
427 mask=(size_t) (1U << bits_per_pixel)-1;
428 for (y=0; y < (ssize_t) image->rows; y++)
429 {
430 if ((flags & PALM_IS_COMPRESSED_FLAG) == 0)
431 {
432 /* TODO move out of loop! */
433 image->compression=NoCompression;
434 count=ReadBlob(image,bytes_per_row,one_row);
435 if (count != (ssize_t) bytes_per_row)
436 break;
437 }
438 else
439 {
440 if (compressionType == PALM_COMPRESSION_RLE)
441 {
442 /* TODO move out of loop! */
443 image->compression=RLECompression;
444 for (i=0; i < (ssize_t) bytes_per_row; )
445 {
446 count=(ssize_t) ReadBlobByte(image);
447 if (count < 0)
448 break;
449 count=MagickMin(count,(ssize_t) bytes_per_row-i);
450 byte=(size_t) ReadBlobByte(image);
451 (void) memset(one_row+i,(int) byte,(size_t) count);
452 i+=count;
453 }
454 }
455 else
456 if (compressionType == PALM_COMPRESSION_SCANLINE)
457 {
458 size_t
459 one;
460
461 /* TODO move out of loop! */
462 one=1;
463 image->compression=FaxCompression;
464 for (i=0; i < (ssize_t) bytes_per_row; i+=8)
465 {
466 count=(ssize_t) ReadBlobByte(image);
467 if (count < 0)
468 break;
469 byte=(size_t) MagickMin((ssize_t) bytes_per_row-i,8);
470 for (bit=0; bit < byte; bit++)
471 {
472 if ((y == 0) || (count & (one << (7 - bit))))
473 one_row[i+bit]=(unsigned char) ReadBlobByte(image);
474 else
475 one_row[i+bit]=last_row[i+bit];
476 }
477 }
478 (void) memcpy(last_row, one_row, bytes_per_row);
479 }
480 }
481 ptr=one_row;
482 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
483 if (q == (Quantum *) NULL)
484 break;
485 if (bits_per_pixel == 16)
486 {
487 if (image->columns > (2*bytes_per_row))
488 {
489 one_row=(unsigned char *) RelinquishMagickMemory(one_row);
490 if (compressionType == PALM_COMPRESSION_SCANLINE)
491 last_row=(unsigned char *) RelinquishMagickMemory(last_row);
492 ThrowReaderException(CorruptImageError,"CorruptImage");
493 }
494 for (x=0; x < (ssize_t) image->columns; x++)
495 {
496 color16=(*ptr++ << 8);
497 color16|=(*ptr++);
498 SetPixelRed(image,(Quantum) ((QuantumRange*((color16 >> 11) &
499 0x1f))/0x1f),q);
500 SetPixelGreen(image,(Quantum) ((QuantumRange*((color16 >> 5) &
501 0x3f))/0x3f),q);
502 SetPixelBlue(image,(Quantum) ((QuantumRange*((color16 >> 0) &
503 0x1f))/0x1f),q);
504 SetPixelAlpha(image,OpaqueAlpha,q);
505 q+=GetPixelChannels(image);
506 }
507 }
508 else
509 {
510 bit=8-bits_per_pixel;
511 for (x=0; x < (ssize_t) image->columns; x++)
512 {
513 if ((size_t) (ptr-one_row) >= bytes_per_row)
514 {
515 one_row=(unsigned char *) RelinquishMagickMemory(one_row);
516 if (compressionType == PALM_COMPRESSION_SCANLINE)
517 last_row=(unsigned char *) RelinquishMagickMemory(last_row);
518 ThrowReaderException(CorruptImageError,"CorruptImage");
519 }
520 index=(Quantum) (mask-(((*ptr) & (mask << bit)) >> bit));
521 SetPixelIndex(image,index,q);
522 SetPixelViaPixelInfo(image,image->colormap+(ssize_t) index,q);
523 if (bit)
524 bit-=bits_per_pixel;
525 else
526 {
527 ptr++;
528 bit=8-bits_per_pixel;
529 }
530 q+=GetPixelChannels(image);
531 }
532 if (SyncAuthenticPixels(image,exception) == MagickFalse)
533 break;
534 }
535 if (image->previous == (Image *) NULL)
536 {
537 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
538 image->rows);
539 if (status == MagickFalse)
540 break;
541 }
542 }
543 if (flags & PALM_HAS_TRANSPARENCY_FLAG)
544 {
545 ssize_t index=ConstrainColormapIndex(image,(ssize_t) (mask-
546 transparentIndex),exception);
547 if (bits_per_pixel != 16)
548 transpix=image->colormap[index];
549 (void) TransparentPaintImage(image,&transpix,(Quantum) TransparentAlpha,
550 MagickFalse,exception);
551 }
552 one_row=(unsigned char *) RelinquishMagickMemory(one_row);
553 if (compressionType == PALM_COMPRESSION_SCANLINE)
554 last_row=(unsigned char *) RelinquishMagickMemory(last_row);
555 if (EOFBlob(image) != MagickFalse)
556 {
557 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
558 image->filename);
559 break;
560 }
561 /*
562 Proceed to next image. Copied from coders/pnm.c
563 */
564 if (image_info->number_scenes != 0)
565 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
566 break;
567 if (nextDepthOffset != 0)
568 {
569 /*
570 Skip to next image.
571 */
572 totalOffset+=(MagickOffsetType) (nextDepthOffset*4);
573 if (totalOffset >= (MagickOffsetType) GetBlobSize(image))
574 ThrowReaderException(CorruptImageError,"ImproperImageHeader")
575 else
576 seekNextDepth=SeekBlob(image,totalOffset,SEEK_SET);
577 if (seekNextDepth != totalOffset)
578 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
579 /*
580 Allocate next image structure. Copied from coders/pnm.c
581 */
582 AcquireNextImage(image_info,image,exception);
583 if (GetNextImageInList(image) == (Image *) NULL)
584 {
585 status=MagickFalse;
586 break;
587 }
588 image=SyncNextImageInList(image);
589 status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
590 GetBlobSize(image));
591 if (status == MagickFalse)
592 break;
593 }
594 } while (nextDepthOffset != 0);
595 (void) CloseBlob(image);
596 if (status == MagickFalse)
597 return(DestroyImageList(image));
598 return(GetFirstImageInList(image));
599 }
600
601 /*
602 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
603 % %
604 % %
605 % %
606 % R e g i s t e r P A L M I m a g e %
607 % %
608 % %
609 % %
610 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
611 %
612 % RegisterPALMImage() adds properties for the PALM image format to the list of
613 % supported formats. The properties include the image format tag, a method to
614 % read and/or write the format, whether the format supports the saving of more
615 % than one frame to the same file or blob, whether the format supports native
616 % in-memory I/O, and a brief description of the format.
617 %
618 % The format of the RegisterPALMImage method is:
619 %
620 % size_t RegisterPALMImage(void)
621 %
622 */
RegisterPALMImage(void)623 ModuleExport size_t RegisterPALMImage(void)
624 {
625 MagickInfo
626 *entry;
627
628 entry=AcquireMagickInfo("PALM","PALM","Palm pixmap");
629 entry->decoder=(DecodeImageHandler *) ReadPALMImage;
630 entry->encoder=(EncodeImageHandler *) WritePALMImage;
631 entry->flags|=CoderDecoderSeekableStreamFlag;
632 entry->flags|=CoderEncoderSeekableStreamFlag;
633 (void) RegisterMagickInfo(entry);
634 return(MagickImageCoderSignature);
635 }
636
637 /*
638 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
639 % %
640 % %
641 % %
642 % U n r e g i s t e r P A L M I m a g e %
643 % %
644 % %
645 % %
646 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
647 %
648 % UnregisterPALMImage() removes format registrations made by the PALM
649 % module from the list of supported formats.
650 %
651 % The format of the UnregisterPALMImage method is:
652 %
653 % UnregisterPALMImage(void)
654 %
655 */
UnregisterPALMImage(void)656 ModuleExport void UnregisterPALMImage(void)
657 {
658 (void) UnregisterMagickInfo("PALM");
659 }
660
661 /*
662 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
663 % %
664 % %
665 % %
666 % W r i t e P A L M I m a g e %
667 % %
668 % %
669 % %
670 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
671 %
672 % WritePALMImage() writes an image of raw bits in LSB order to a file.
673 %
674 % The format of the WritePALMImage method is:
675 %
676 % MagickBooleanType WritePALMImage(const ImageInfo *image_info,
677 % Image *image,ExceptionInfo *exception)
678 %
679 % A description of each parameter follows.
680 %
681 % o image_info: Specifies a pointer to an ImageInfo structure.
682 %
683 % o image: A pointer to a Image structure.
684 %
685 % o exception: return any errors or warnings in this structure.
686 %
687 */
WritePALMImage(const ImageInfo * image_info,Image * image,ExceptionInfo * exception)688 static MagickBooleanType WritePALMImage(const ImageInfo *image_info,
689 Image *image,ExceptionInfo *exception)
690 {
691 int
692 bit;
693
694 MagickBooleanType
695 status;
696
697 MagickOffsetType
698 currentOffset,
699 offset,
700 scene;
701
702 MagickSizeType
703 cc;
704
705 PixelInfo
706 transpix;
707
708 QuantizeInfo
709 *quantize_info;
710
711 ssize_t
712 x;
713
714 const Quantum
715 *p;
716
717 Quantum
718 *q;
719
720 ssize_t
721 y;
722
723 size_t
724 count,
725 bits_per_pixel,
726 bytes_per_row,
727 imageListLength,
728 nextDepthOffset,
729 one;
730
731 unsigned char
732 byte,
733 color,
734 *last_row,
735 *one_row,
736 *ptr,
737 version;
738
739 unsigned int
740 transparentIndex;
741
742 unsigned short
743 color16,
744 flags;
745
746 /*
747 Open output image file.
748 */
749 assert(image_info != (const ImageInfo *) NULL);
750 assert(image_info->signature == MagickCoreSignature);
751 assert(image != (Image *) NULL);
752 assert(image->signature == MagickCoreSignature);
753 if (image->debug != MagickFalse)
754 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
755 assert(exception != (ExceptionInfo *) NULL);
756 assert(exception->signature == MagickCoreSignature);
757 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
758 if (status == MagickFalse)
759 return(status);
760 quantize_info=AcquireQuantizeInfo(image_info);
761 flags=0;
762 currentOffset=0;
763 transparentIndex=0;
764 transpix.red=0.0;
765 transpix.green=0.0;
766 transpix.blue=0.0;
767 transpix.alpha=0.0;
768 one=1;
769 version=0;
770 scene=0;
771 imageListLength=GetImageListLength(image);
772 do
773 {
774 (void) TransformImageColorspace(image,sRGBColorspace,exception);
775 count=GetNumberColors(image,NULL,exception);
776 for (bits_per_pixel=1; (one << bits_per_pixel) < count; bits_per_pixel*=2) ;
777 if (bits_per_pixel > 16)
778 bits_per_pixel=16;
779 else
780 if (bits_per_pixel < 16)
781 (void) TransformImageColorspace(image,image->colorspace,exception);
782 if (bits_per_pixel < 8)
783 {
784 (void) TransformImageColorspace(image,GRAYColorspace,exception);
785 (void) SetImageType(image,PaletteType,exception);
786 (void) SortColormapByIntensity(image,exception);
787 }
788 if ((image->storage_class == PseudoClass) && (image->colors > 256))
789 (void) SetImageStorageClass(image,DirectClass,exception);
790 if (image->storage_class == PseudoClass)
791 flags|=PALM_HAS_COLORMAP_FLAG;
792 else
793 flags|=PALM_IS_DIRECT_COLOR;
794 (void) WriteBlobMSBShort(image,(unsigned short) image->columns); /* width */
795 (void) WriteBlobMSBShort(image,(unsigned short) image->rows); /* height */
796 bytes_per_row=((image->columns+(16/bits_per_pixel-1))/(16/
797 bits_per_pixel))*2;
798 (void) WriteBlobMSBShort(image,(unsigned short) bytes_per_row);
799 if ((image_info->compression == RLECompression) ||
800 (image_info->compression == FaxCompression))
801 flags|=PALM_IS_COMPRESSED_FLAG;
802 (void) WriteBlobMSBShort(image, flags);
803 (void) WriteBlobByte(image,(unsigned char) bits_per_pixel);
804 if (bits_per_pixel > 1)
805 version=1;
806 if ((image_info->compression == RLECompression) ||
807 (image_info->compression == FaxCompression))
808 version=2;
809 (void) WriteBlobByte(image,version);
810 (void) WriteBlobMSBShort(image,0); /* nextDepthOffset */
811 (void) WriteBlobByte(image,(unsigned char) transparentIndex);
812 if (image_info->compression == RLECompression)
813 (void) WriteBlobByte(image,PALM_COMPRESSION_RLE);
814 else
815 if (image_info->compression == FaxCompression)
816 (void) WriteBlobByte(image,PALM_COMPRESSION_SCANLINE);
817 else
818 (void) WriteBlobByte(image,PALM_COMPRESSION_NONE);
819 (void) WriteBlobMSBShort(image,0); /* reserved */
820 offset=16;
821 if (bits_per_pixel == 16)
822 {
823 (void) WriteBlobByte(image,5); /* # of bits of red */
824 (void) WriteBlobByte(image,6); /* # of bits of green */
825 (void) WriteBlobByte(image,5); /* # of bits of blue */
826 (void) WriteBlobByte(image,0); /* reserved by Palm */
827 (void) WriteBlobMSBLong(image,0); /* no transparent color, YET */
828 offset+=8;
829 }
830 if (bits_per_pixel == 8)
831 {
832 if (flags & PALM_HAS_COLORMAP_FLAG) /* Write out colormap */
833 {
834 quantize_info->dither_method=IdentifyPaletteImage(image,exception)
835 == MagickFalse ? RiemersmaDitherMethod : NoDitherMethod;
836 quantize_info->number_colors=image->colors;
837 (void) QuantizeImage(quantize_info,image,exception);
838 (void) WriteBlobMSBShort(image,(unsigned short) image->colors);
839 for (count = 0; count < image->colors; count++)
840 {
841 (void) WriteBlobByte(image,(unsigned char) count);
842 (void) WriteBlobByte(image,ScaleQuantumToChar(ClampToQuantum(
843 image->colormap[count].red)));
844 (void) WriteBlobByte(image,ScaleQuantumToChar(ClampToQuantum(
845 image->colormap[count].green)));
846 (void) WriteBlobByte(image,ScaleQuantumToChar(ClampToQuantum(
847 image->colormap[count].blue)));
848 }
849 offset+=2+count*4;
850 }
851 else /* Map colors to Palm standard colormap */
852 {
853 Image
854 *affinity_image;
855
856 affinity_image=ConstituteImage(256,1,"RGB",CharPixel,&PalmPalette,
857 exception);
858 (void) TransformImageColorspace(affinity_image,
859 affinity_image->colorspace,exception);
860 (void) RemapImage(quantize_info,image,affinity_image,exception);
861 for (y=0; y < (ssize_t) image->rows; y++)
862 {
863 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
864 if (q == (Quantum *) NULL)
865 break;
866 for (x=0; x < (ssize_t) image->columns; x++)
867 {
868 SetPixelIndex(image,(Quantum) FindColor(&image->colormap[(ssize_t)
869 GetPixelIndex(image,q)]),q);
870 q+=GetPixelChannels(image);
871 }
872 }
873 affinity_image=DestroyImage(affinity_image);
874 }
875 }
876 if (flags & PALM_IS_COMPRESSED_FLAG)
877 (void) WriteBlobMSBShort(image,0); /* fill in size later */
878 last_row=(unsigned char *) NULL;
879 if (image_info->compression == FaxCompression)
880 {
881 last_row=(unsigned char *) AcquireQuantumMemory(bytes_per_row+256,
882 sizeof(*last_row));
883 if (last_row == (unsigned char *) NULL)
884 {
885 quantize_info=DestroyQuantizeInfo(quantize_info);
886 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
887 }
888 }
889 one_row=(unsigned char *) AcquireQuantumMemory(bytes_per_row+256,
890 sizeof(*one_row));
891 if (one_row == (unsigned char *) NULL)
892 {
893 if (last_row != (unsigned char *) NULL)
894 last_row=(unsigned char *) RelinquishMagickMemory(last_row);
895 quantize_info=DestroyQuantizeInfo(quantize_info);
896 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
897 }
898 for (y=0; y < (ssize_t) image->rows; y++)
899 {
900 ptr=one_row;
901 (void) memset(ptr,0,bytes_per_row);
902 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
903 if (p == (const Quantum *) NULL)
904 break;
905 if (bits_per_pixel == 16)
906 {
907 for (x=0; x < (ssize_t) image->columns; x++)
908 {
909 color16=(unsigned short) ((((31*(ssize_t) GetPixelRed(image,p))/
910 (ssize_t) QuantumRange) << 11) | (((63*(ssize_t)
911 GetPixelGreen(image,p))/(ssize_t) QuantumRange) << 5) |
912 ((31*(ssize_t) GetPixelBlue(image,p))/(ssize_t) QuantumRange));
913 if (GetPixelAlpha(image,p) == (Quantum) TransparentAlpha)
914 {
915 transpix.red=(MagickRealType) GetPixelRed(image,p);
916 transpix.green=(MagickRealType) GetPixelGreen(image,p);
917 transpix.blue=(MagickRealType) GetPixelBlue(image,p);
918 transpix.alpha=(MagickRealType) GetPixelAlpha(image,p);
919 flags|=PALM_HAS_TRANSPARENCY_FLAG;
920 }
921 *ptr++=(unsigned char) ((color16 >> 8) & 0xff);
922 *ptr++=(unsigned char) (color16 & 0xff);
923 p+=GetPixelChannels(image);
924 }
925 }
926 else
927 {
928 byte=0x00;
929 bit=(unsigned char) (8-bits_per_pixel);
930 for (x=0; x < (ssize_t) image->columns; x++)
931 {
932 if (bits_per_pixel >= 8)
933 color=(unsigned char) ((ssize_t) GetPixelIndex(image,p));
934 else
935 color=(unsigned char) (GetPixelIndex(image,p)*
936 ((one << bits_per_pixel)-1)/MagickMax(1*image->colors-1,1));
937 byte|=color << bit;
938 if (bit != 0)
939 bit-=(unsigned char) bits_per_pixel;
940 else
941 {
942 *ptr++=byte;
943 byte=0x00;
944 bit=(unsigned char) (8-bits_per_pixel);
945 }
946 p+=GetPixelChannels(image);
947 }
948 if ((image->columns % (8/bits_per_pixel)) != 0)
949 *ptr++=byte;
950 }
951 if (image_info->compression == RLECompression)
952 {
953 x=0;
954 while (x < (ssize_t) bytes_per_row)
955 {
956 byte=one_row[x];
957 count=1;
958 while ((one_row[++x] == byte) && (count < 255) &&
959 (x < (ssize_t) bytes_per_row))
960 count++;
961 (void) WriteBlobByte(image,(unsigned char) count);
962 (void) WriteBlobByte(image,(unsigned char) byte);
963 }
964 }
965 else
966 if (image_info->compression == FaxCompression)
967 {
968 char
969 tmpbuf[8],
970 *tptr;
971
972 for (x=0; x < (ssize_t) bytes_per_row; x+=8)
973 {
974 tptr = tmpbuf;
975 for (bit=0, byte=0; bit < (int) MagickMin(8L,(ssize_t) bytes_per_row-x); bit++)
976 {
977 if ((y == 0) || (last_row[x + bit] != one_row[x + bit]))
978 {
979 byte |= (1 << (7 - bit));
980 *tptr++ = (char) one_row[x + bit];
981 }
982 }
983 (void) WriteBlobByte(image, byte);
984 (void) WriteBlob(image,tptr-tmpbuf,(unsigned char *) tmpbuf);
985 }
986 (void) memcpy(last_row,one_row,bytes_per_row);
987 }
988 else
989 (void) WriteBlob(image,bytes_per_row,one_row);
990 }
991 if (flags & PALM_HAS_TRANSPARENCY_FLAG)
992 {
993 offset=SeekBlob(image,currentOffset+6,SEEK_SET);
994 (void) WriteBlobMSBShort(image,flags);
995 offset=SeekBlob(image,currentOffset+12,SEEK_SET);
996 (void) WriteBlobByte(image,(unsigned char) transparentIndex); /* trans index */
997 }
998 if (bits_per_pixel == 16)
999 {
1000 offset=SeekBlob(image,currentOffset+20,SEEK_SET);
1001 (void) WriteBlobByte(image,0); /* reserved by Palm */
1002 (void) WriteBlobByte(image,(unsigned char) ((31*transpix.red)/
1003 QuantumRange));
1004 (void) WriteBlobByte(image,(unsigned char) ((63*transpix.green)/
1005 QuantumRange));
1006 (void) WriteBlobByte(image,(unsigned char) ((31*transpix.blue)/
1007 QuantumRange));
1008 }
1009 if (flags & PALM_IS_COMPRESSED_FLAG) /* fill in size now */
1010 {
1011 offset=SeekBlob(image,currentOffset+offset,SEEK_SET);
1012 (void) WriteBlobMSBShort(image,(unsigned short) (GetBlobSize(image)-
1013 currentOffset-offset));
1014 }
1015 if (one_row != (unsigned char *) NULL)
1016 one_row=(unsigned char *) RelinquishMagickMemory(one_row);
1017 if (last_row != (unsigned char *) NULL)
1018 last_row=(unsigned char *) RelinquishMagickMemory(last_row);
1019 if (GetNextImageInList(image) == (Image *) NULL)
1020 break;
1021 /* padding to 4 byte word */
1022 for (cc=(GetBlobSize(image)) % 4; cc > 0; cc--)
1023 (void) WriteBlobByte(image,0);
1024 /* write nextDepthOffset and return to end of image */
1025 offset=SeekBlob(image,currentOffset+10,SEEK_SET);
1026 nextDepthOffset=(size_t) ((GetBlobSize(image)-currentOffset)/4);
1027 (void) WriteBlobMSBShort(image,(unsigned short) nextDepthOffset);
1028 currentOffset=(MagickOffsetType) GetBlobSize(image);
1029 offset=SeekBlob(image,currentOffset,SEEK_SET);
1030 image=SyncNextImageInList(image);
1031 status=SetImageProgress(image,SaveImagesTag,scene++,imageListLength);
1032 if (status == MagickFalse)
1033 break;
1034 } while (image_info->adjoin != MagickFalse);
1035 quantize_info=DestroyQuantizeInfo(quantize_info);
1036 (void) CloseBlob(image);
1037 return(MagickTrue);
1038 }
1039