2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
12 % Read DR Halo Image Format %
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20 % copy of this software and associated documentation files ("ImageMagick"), %
21 % to deal in ImageMagick without restriction, including without limitation %
22 % the rights to use, copy, modify, merge, publish, distribute, sublicense, %
23 % and/or sell copies of ImageMagick, and to permit persons to whom the %
24 % ImageMagick is furnished to do so, subject to the following conditions: %
26 % The above copyright notice and this permission notice shall be included in %
27 % all copies or substantial portions of ImageMagick. %
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30 % implied, including but not limited to the warranties of merchantability, %
31 % fitness for a particular purpose and noninfringement. In no event shall %
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33 % whether in an action of contract, tort or otherwise, arising from, out of %
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37 % Except as contained in this notice, the name of the ImageMagick Studio %
38 % shall not be used in advertising or otherwise to promote the sale, use or %
39 % other dealings in ImageMagick without prior written authorization from the %
40 % ImageMagick Studio. %
42 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
50 #include "MagickCore/studio.h"
51 #include "MagickCore/attribute.h"
52 #include "MagickCore/blob.h"
53 #include "MagickCore/blob-private.h"
54 #include "MagickCore/cache.h"
55 #include "MagickCore/color.h"
56 #include "MagickCore/color-private.h"
57 #include "MagickCore/colormap.h"
58 #include "MagickCore/colormap-private.h"
59 #include "MagickCore/exception.h"
60 #include "MagickCore/exception-private.h"
61 #include "MagickCore/image.h"
62 #include "MagickCore/image-private.h"
63 #include "MagickCore/list.h"
64 #include "MagickCore/magick.h"
65 #include "MagickCore/memory_.h"
66 #include "MagickCore/pixel-accessor.h"
67 #include "MagickCore/quantum-private.h"
68 #include "MagickCore/static.h"
69 #include "MagickCore/string_.h"
70 #include "MagickCore/module.h"
71 #include "MagickCore/utility.h"
88 unsigned GraphicsMode;
97 static void InsertRow(ssize_t depth,unsigned char *p,ssize_t y,Image *image)
102 size_t bit; ssize_t x;
107 exception=(&image->exception);
110 case 1: /* Convert bitmap scanline. */
112 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
113 if (q == (const Quantum *) NULL)
115 for (x=0; x < ((ssize_t) image->columns-7); x+=8)
117 for (bit=0; bit < 8; bit++)
119 index=(Quantum) ((((*p) & (0x80 >> bit)) != 0) ? 0x01 : 0x00);
120 SetPixelIndex(image,index,q);
121 q+=GetPixelChannels(image);
125 if ((image->columns % 8) != 0)
127 for (bit=0; bit < (image->columns % 8); bit++)
129 index=(Quantum) ((((*p) & (0x80 >> bit)) != 0) ? 0x01 : 0x00);
130 SetPixelIndex(image,index,q);
131 q+=GetPixelChannels(image);
135 if (SyncAuthenticPixels(image,exception) == MagickFalse)
139 case 2: /* Convert PseudoColor scanline. */
141 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
142 if (q == (const Quantum *) NULL)
144 for (x=0; x < ((ssize_t) image->columns-1); x+=2)
146 index=ConstrainColormapIndex(image,(*p >> 6) & 0x3);
147 SetPixelIndex(image,index,q);
148 q+=GetPixelChannels(image);
149 index=ConstrainColormapIndex(image,(*p >> 4) & 0x3);
150 SetPixelIndex(image,index,q);
151 q+=GetPixelChannels(image);
152 index=ConstrainColormapIndex(image,(*p >> 2) & 0x3);
153 SetPixelIndex(image,index,q);
154 q+=GetPixelChannels(image);
155 index=ConstrainColormapIndex(image,(*p) & 0x3);
156 SetPixelIndex(image,index,q);
157 q+=GetPixelChannels(image);
160 if ((image->columns % 4) != 0)
162 index=ConstrainColormapIndex(image,(*p >> 6) & 0x3);
163 SetPixelIndex(image,index,q);
164 q+=GetPixelChannels(image);
165 if ((image->columns % 4) >= 1)
168 index=ConstrainColormapIndex(image,(*p >> 4) & 0x3);
169 SetPixelIndex(image,index,q);
170 q+=GetPixelChannels(image);
171 if ((image->columns % 4) >= 2)
174 index=ConstrainColormapIndex(image,(*p >> 2) & 0x3);
175 SetPixelIndex(image,index,q);
176 q+=GetPixelChannels(image);
181 if (SyncAuthenticPixels(image,exception) == MagickFalse)
186 case 4: /* Convert PseudoColor scanline. */
188 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
189 if (q == (const Quantum *) NULL)
191 for (x=0; x < ((ssize_t) image->columns-1); x+=2)
193 index=ConstrainColormapIndex(image,(*p >> 4) & 0xf);
194 SetPixelIndex(image,index,q);
195 q+=GetPixelChannels(image);
196 index=ConstrainColormapIndex(image,(*p) & 0xf);
197 SetPixelIndex(image,index,q);
198 q+=GetPixelChannels(image);
201 if ((image->columns % 2) != 0)
203 index=ConstrainColormapIndex(image,(*p >> 4) & 0xf);
204 SetPixelIndex(image,index,q);
205 q+=GetPixelChannels(image);
208 if (SyncAuthenticPixels(image,exception) == MagickFalse)
212 case 8: /* Convert PseudoColor scanline. */
214 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
215 if (q == (const Quantum *) NULL) break;
216 for (x=0; x < (ssize_t) image->columns; x++)
218 index=ConstrainColormapIndex(image,*p);
219 SetPixelIndex(image,index,q);
221 q+=GetPixelChannels(image);
223 if (SyncAuthenticPixels(image,exception) == MagickFalse)
232 Compute the number of colors in Grayed R[i]=G[i]=B[i] image
234 static int GetCutColors(Image *image)
250 exception=(&image->exception);
252 scale_intensity=ScaleCharToQuantum(16);
253 for (y=0; y < (ssize_t) image->rows; y++)
255 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
256 for (x=0; x < (ssize_t) image->columns; x++)
258 if (intensity < GetPixelRed(image,q))
259 intensity=GetPixelRed(image,q);
260 if (intensity >= scale_intensity)
262 q+=GetPixelChannels(image);
265 if (intensity < ScaleCharToQuantum(2))
267 if (intensity < ScaleCharToQuantum(16))
269 return((int) intensity);
273 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
277 % R e a d C U T I m a g e %
281 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
283 % ReadCUTImage() reads an CUT X image file and returns it. It
284 % allocates the memory necessary for the new Image structure and returns a
285 % pointer to the new image.
287 % The format of the ReadCUTImage method is:
289 % Image *ReadCUTImage(const ImageInfo *image_info,ExceptionInfo *exception)
291 % A description of each parameter follows:
293 % o image_info: the image info.
295 % o exception: return any errors or warnings in this structure.
298 static Image *ReadCUTImage(const ImageInfo *image_info,ExceptionInfo *exception)
300 Image *image,*palette;
301 ImageInfo *clone_info;
302 MagickBooleanType status;
308 unsigned char RunCount,RunValue,RunCountMasked;
310 CUTPalHeader PalHeader;
314 unsigned char *BImgBuff=NULL,*ptrB;
320 assert(image_info != (const ImageInfo *) NULL);
321 assert(image_info->signature == MagickSignature);
322 if (image_info->debug != MagickFalse)
323 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
324 image_info->filename);
325 assert(exception != (ExceptionInfo *) NULL);
326 assert(exception->signature == MagickSignature);
327 image=AcquireImage(image_info);
328 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
329 if (status == MagickFalse)
331 image=DestroyImageList(image);
332 return((Image *) NULL);
339 Header.Width=ReadBlobLSBShort(image);
340 Header.Height=ReadBlobLSBShort(image);
341 Header.Reserved=ReadBlobLSBShort(image);
343 if (Header.Width==0 || Header.Height==0 || Header.Reserved!=0)
344 CUT_KO: ThrowReaderException(CorruptImageError,"ImproperImageHeader");
346 /*---This code checks first line of image---*/
347 EncodedByte=ReadBlobLSBShort(image);
348 RunCount=(unsigned char) ReadBlobByte(image);
349 RunCountMasked=RunCount & 0x7F;
351 while((int) RunCountMasked!=0) /*end of line?*/
354 if((int) RunCount<0x80) i=(ssize_t) RunCountMasked;
355 offset=SeekBlob(image,TellBlob(image)+i,SEEK_SET);
357 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
358 if(EOFBlob(image) != MagickFalse) goto CUT_KO; /*wrong data*/
360 ldblk+=(ssize_t) RunCountMasked;
362 RunCount=(unsigned char) ReadBlobByte(image);
363 if(EOFBlob(image) != MagickFalse) goto CUT_KO; /*wrong data: unexpected eof in line*/
364 RunCountMasked=RunCount & 0x7F;
366 if(EncodedByte!=1) goto CUT_KO; /*wrong data: size incorrect*/
367 i=0; /*guess a number of bit planes*/
368 if(ldblk==(int) Header.Width) i=8;
369 if(2*ldblk==(int) Header.Width) i=4;
370 if(8*ldblk==(int) Header.Width) i=1;
371 if(i==0) goto CUT_KO; /*wrong data: incorrect bit planes*/
374 image->columns=Header.Width;
375 image->rows=Header.Height;
377 image->colors=(size_t) (GetQuantumRange(1UL*i)+1);
379 if (image_info->ping) goto Finish;
381 /* ----- Do something with palette ----- */
382 if ((clone_info=CloneImageInfo(image_info)) == NULL) goto NoPalette;
385 i=(ssize_t) strlen(clone_info->filename);
389 if(clone_info->filename[i]=='.')
393 if(clone_info->filename[i]=='/' || clone_info->filename[i]=='\\' ||
394 clone_info->filename[i]==':' )
401 (void) CopyMagickString(clone_info->filename+i,".PAL",(size_t)
403 if((clone_info->file=OpenMagickStream(clone_info->filename,"rb"))==NULL)
405 (void) CopyMagickString(clone_info->filename+i,".pal",(size_t)
407 if((clone_info->file=OpenMagickStream(clone_info->filename,"rb"))==NULL)
409 clone_info->filename[i]='\0';
410 if((clone_info->file=OpenMagickStream(clone_info->filename,"rb"))==NULL)
412 clone_info=DestroyImageInfo(clone_info);
419 if( (palette=AcquireImage(clone_info))==NULL ) goto NoPalette;
420 status=OpenBlob(clone_info,palette,ReadBinaryBlobMode,exception);
421 if (status == MagickFalse)
424 palette=DestroyImage(palette);
432 (void) ReadBlob(palette,2,(unsigned char *) PalHeader.FileId);
433 if(strncmp(PalHeader.FileId,"AH",2) != 0) goto ErasePalette;
434 PalHeader.Version=ReadBlobLSBShort(palette);
435 PalHeader.Size=ReadBlobLSBShort(palette);
436 PalHeader.FileType=(char) ReadBlobByte(palette);
437 PalHeader.SubType=(char) ReadBlobByte(palette);
438 PalHeader.BoardID=ReadBlobLSBShort(palette);
439 PalHeader.GraphicsMode=ReadBlobLSBShort(palette);
440 PalHeader.MaxIndex=ReadBlobLSBShort(palette);
441 PalHeader.MaxRed=ReadBlobLSBShort(palette);
442 PalHeader.MaxGreen=ReadBlobLSBShort(palette);
443 PalHeader.MaxBlue=ReadBlobLSBShort(palette);
444 (void) ReadBlob(palette,20,(unsigned char *) PalHeader.PaletteId);
446 if(PalHeader.MaxIndex<1) goto ErasePalette;
447 image->colors=PalHeader.MaxIndex+1;
448 if (AcquireImageColormap(image,image->colors) == MagickFalse) goto NoMemory;
450 if(PalHeader.MaxRed==0) PalHeader.MaxRed=(unsigned int) QuantumRange; /*avoid division by 0*/
451 if(PalHeader.MaxGreen==0) PalHeader.MaxGreen=(unsigned int) QuantumRange;
452 if(PalHeader.MaxBlue==0) PalHeader.MaxBlue=(unsigned int) QuantumRange;
454 for(i=0;i<=(int) PalHeader.MaxIndex;i++)
455 { /*this may be wrong- I don't know why is palette such strange*/
456 j=(ssize_t) TellBlob(palette);
460 offset=SeekBlob(palette,j,SEEK_SET);
462 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
464 image->colormap[i].red=(Quantum) ReadBlobLSBShort(palette);
465 if (QuantumRange != (Quantum) PalHeader.MaxRed)
467 image->colormap[i].red=ClampToQuantum(((double)
468 image->colormap[i].red*QuantumRange+(PalHeader.MaxRed>>1))/
471 image->colormap[i].green=(Quantum) ReadBlobLSBShort(palette);
472 if (QuantumRange != (Quantum) PalHeader.MaxGreen)
474 image->colormap[i].green=ClampToQuantum
475 (((double) image->colormap[i].green*QuantumRange+(PalHeader.MaxGreen>>1))/PalHeader.MaxGreen);
477 image->colormap[i].blue=(Quantum) ReadBlobLSBShort(palette);
478 if (QuantumRange != (Quantum) PalHeader.MaxBlue)
480 image->colormap[i].blue=ClampToQuantum
481 (((double)image->colormap[i].blue*QuantumRange+(PalHeader.MaxBlue>>1))/PalHeader.MaxBlue);
494 if (AcquireImageColormap(image,image->colors) == MagickFalse)
497 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
500 for (i=0; i < (ssize_t)image->colors; i++)
502 image->colormap[i].red=ScaleCharToQuantum((unsigned char) i);
503 image->colormap[i].green=ScaleCharToQuantum((unsigned char) i);
504 image->colormap[i].blue=ScaleCharToQuantum((unsigned char) i);
509 /* ----- Load RLE compressed raster ----- */
510 BImgBuff=(unsigned char *) AcquireQuantumMemory((size_t) ldblk,
511 sizeof(*BImgBuff)); /*Ldblk was set in the check phase*/
512 if(BImgBuff==NULL) goto NoMemory;
514 offset=SeekBlob(image,6 /*sizeof(Header)*/,SEEK_SET);
516 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
517 for (i=0; i < (int) Header.Height; i++)
519 EncodedByte=ReadBlobLSBShort(image);
524 RunCount=(unsigned char) ReadBlobByte(image);
525 RunCountMasked=RunCount & 0x7F;
527 while ((int) RunCountMasked != 0)
529 if((ssize_t) RunCountMasked>j)
531 RunCountMasked=(unsigned char) j;
538 if((int) RunCount>0x80)
540 RunValue=(unsigned char) ReadBlobByte(image);
541 (void) ResetMagickMemory(ptrB,(int) RunValue,(size_t) RunCountMasked);
544 (void) ReadBlob(image,(size_t) RunCountMasked,ptrB);
547 ptrB+=(int) RunCountMasked;
548 j-=(int) RunCountMasked;
550 if (EOFBlob(image) != MagickFalse) goto Finish; /* wrong data: unexpected eof in line */
551 RunCount=(unsigned char) ReadBlobByte(image);
552 RunCountMasked=RunCount & 0x7F;
555 InsertRow(depth,BImgBuff,i,image);
557 (void) SyncImage(image);
560 /*detect monochrome image*/
563 { /*attempt to detect binary (black&white) images*/
564 if ((image->storage_class == PseudoClass) &&
565 (IsImageGray(image,&image->exception) != MagickFalse))
567 if(GetCutColors(image)==2)
569 for (i=0; i < (ssize_t)image->colors; i++)
573 sample=ScaleCharToQuantum((unsigned char) i);
574 if(image->colormap[i].red!=sample) goto Finish;
575 if(image->colormap[i].green!=sample) goto Finish;
576 if(image->colormap[i].blue!=sample) goto Finish;
579 image->colormap[1].red=image->colormap[1].green=
580 image->colormap[1].blue=(Quantum) QuantumRange;
581 for (i=0; i < (ssize_t)image->rows; i++)
583 q=QueueAuthenticPixels(image,0,i,image->columns,1,exception);
584 for (j=0; j < (ssize_t)image->columns; j++)
586 if (GetPixelRed(image,q) == ScaleCharToQuantum(1))
588 SetPixelRed(image,QuantumRange,q);
589 SetPixelGreen(image,QuantumRange,q);
590 SetPixelBlue(image,QuantumRange,q);
592 q+=GetPixelChannels(image);
594 if (SyncAuthenticPixels(image,exception) == MagickFalse) goto Finish;
601 if (BImgBuff != NULL)
602 BImgBuff=(unsigned char *) RelinquishMagickMemory(BImgBuff);
604 palette=DestroyImage(palette);
605 if (clone_info != NULL)
606 clone_info=DestroyImageInfo(clone_info);
607 if (EOFBlob(image) != MagickFalse)
608 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
610 (void) CloseBlob(image);
611 return(GetFirstImageInList(image));
615 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
619 % R e g i s t e r C U T I m a g e %
623 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
625 % RegisterCUTImage() adds attributes for the CUT image format to
626 % the list of supported formats. The attributes include the image format
627 % tag, a method to read and/or write the format, whether the format
628 % supports the saving of more than one frame to the same file or blob,
629 % whether the format supports native in-memory I/O, and a brief
630 % description of the format.
632 % The format of the RegisterCUTImage method is:
634 % size_t RegisterCUTImage(void)
637 ModuleExport size_t RegisterCUTImage(void)
642 entry=SetMagickInfo("CUT");
643 entry->decoder=(DecodeImageHandler *) ReadCUTImage;
644 entry->seekable_stream=MagickTrue;
645 entry->description=ConstantString("DR Halo");
646 entry->module=ConstantString("CUT");
647 (void) RegisterMagickInfo(entry);
648 return(MagickImageCoderSignature);
652 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
656 % U n r e g i s t e r C U T I m a g e %
660 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
662 % UnregisterCUTImage() removes format registrations made by the
663 % CUT module from the list of supported formats.
665 % The format of the UnregisterCUTImage method is:
667 % UnregisterCUTImage(void)
670 ModuleExport void UnregisterCUTImage(void)
672 (void) UnregisterMagickInfo("CUT");