/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % SSSSS FFFFF W W % % SS F W W % % SSS FFF W W % % SS F W W W % % SSSSS F W W % % % % % % Read/Write ImageMagick Image Format. % % % % Software Design % % John Cristy % % July 1992 % % % % % % Copyright 1999-2007 ImageMagick Studio LLC, a non-profit organization % % dedicated to making software imaging solutions freely available. % % % % You may not use this file except in compliance with the License. You may % % obtain a copy of the License at % % % % http://www.imagemagick.org/script/license.php % % % % Unless required by applicable law or agreed to in writing, software % % distributed under the License is distributed on an "AS IS" BASIS, % % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % % See the License for the specific language governing permissions and % % limitations under the License. % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % */ /* Include declarations. */ #include "magick/studio.h" #include "magick/blob.h" #include "magick/blob-private.h" #include "magick/constitute.h" #include "magick/exception.h" #include "magick/exception-private.h" #include "magick/image.h" #include "magick/image-private.h" #include "magick/list.h" #include "magick/magick.h" #include "magick/memory_.h" #include "magick/resource_.h" #include "magick/quantum-private.h" #include "magick/static.h" #include "magick/string_.h" #include "magick/module.h" #include "magick/transform.h" #include "magick/utility.h" /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % I s S F W % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % IsSFW() returns MagickTrue if the image format type, identified by the % magick string, is SFW. % % The format of the IsSFW method is: % % MagickBooleanType IsSFW(const unsigned char *magick,const size_t length) % % A description of each parameter follows: % % o magick: This string is generally the first few bytes of an image file % or blob. % % o length: Specifies the length of the magick string. % */ static MagickBooleanType IsSFW(const unsigned char *magick,const size_t length) { if (length < 5) return(MagickFalse); if (LocaleNCompare((char *) magick,"SFW94",5) == 0) return(MagickTrue); return(MagickFalse); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d S F W I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadSFWImage() reads a Seattle Film Works image file and returns it. % It allocates the memory necessary for the new Image structure and returns a % pointer to the new image. % % The format of the ReadSFWImage method is: % % Image *ReadSFWImage(const ImageInfo *image_info,ExceptionInfo *exception) % % A description of each parameter follows: % % o image_info: The image info. % % o exception: return any errors or warnings in this structure. % */ static unsigned char *SFWScan(const unsigned char *p,const unsigned char *q, const unsigned char *target,const int length) { register long i; for ( ; p < q; p++) { if (*p != *target) continue; if (length == 1) return((unsigned char *) p); for (i=1; i < length; i++) if (*(p+i) != *(target+i)) break; if (i == length) return((unsigned char *) p); } return((unsigned char *) NULL); } static void TranslateSFWMarker(unsigned char *marker) { switch (marker[1]) { case 0xc8: marker[1]=0xd8; break; /* soi */ case 0xd0: marker[1]=0xe0; break; /* app */ case 0xcb: marker[1]=0xdb; break; /* dqt */ case 0xa0: marker[1]=0xc0; break; /* sof */ case 0xa4: marker[1]=0xc4; break; /* sof */ case 0xca: marker[1]=0xda; break; /* sos */ case 0xc9: marker[1]=0xd9; break; /* eoi */ default: break; } } static Image *ReadSFWImage(const ImageInfo *image_info,ExceptionInfo *exception) { static unsigned char HuffmanTable[] = { 0xFF, 0xC4, 0x01, 0xA2, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1, 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1, 0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16, 0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA }; FILE *file; Image *flipped_image, *image; ImageInfo *read_info; int unique_file; MagickBooleanType status; register unsigned char *header, *data; ssize_t count; unsigned char *buffer, *offset; /* Open image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickSignature); if (image_info->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", image_info->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); image=AllocateImage(image_info); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) { image=DestroyImageList(image); return((Image *) NULL); } /* Read image into a buffer. */ buffer=(unsigned char *) AcquireQuantumMemory((size_t) GetBlobSize(image), sizeof(*buffer)); if (buffer == (unsigned char *) NULL) ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); count=ReadBlob(image,(size_t) GetBlobSize(image),buffer); if ((count == 0) || (LocaleNCompare((char *) buffer,"SFW",3) != 0)) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); CloseBlob(image); image=DestroyImage(image); /* Find the start of the JFIF data */ header=SFWScan(buffer,buffer+count-1,(unsigned char *) "\377\310\377\320",4); if (header == (unsigned char *) NULL) { buffer=(unsigned char *) RelinquishMagickMemory(buffer); ThrowReaderException(CorruptImageError,"ImproperImageHeader"); } TranslateSFWMarker(header); /* translate soi and app tags */ TranslateSFWMarker(header+2); (void) CopyMagickMemory(header+6,"JFIF\0\001\0",7); /* JFIF magic */ /* Translate remaining markers. */ offset=header+2; offset+=(offset[2] << 8)+offset[3]+2; for ( ; ; ) { TranslateSFWMarker(offset); if (offset[1] == 0xda) break; offset+=(offset[2] << 8)+offset[3]+2; } offset--; data=SFWScan(offset,buffer+count-1,(unsigned char *) "\377\311",2); if (data == (unsigned char *) NULL) { buffer=(unsigned char *) RelinquishMagickMemory(buffer); ThrowReaderException(CorruptImageError,"ImproperImageHeader"); } TranslateSFWMarker(data++); /* translate eoi marker */ /* Write JFIF file. */ read_info=CloneImageInfo(image_info); read_info->blob=(void *) NULL; read_info->length=0; file=(FILE *) NULL; unique_file=AcquireUniqueFileResource(read_info->filename); if (unique_file != -1) file=MagickOpenStream(read_info->filename,"wb"); if ((unique_file == -1) || (file == (FILE *) NULL)) { buffer=(unsigned char *) RelinquishMagickMemory(buffer); read_info=DestroyImageInfo(read_info); (void) CopyMagickString(image->filename,read_info->filename, MaxTextExtent); ThrowFileException(exception,FileOpenError,"UnableToCreateTemporaryFile", image->filename); image=DestroyImageList(image); return((Image *) NULL); } (void) fwrite(header,(size_t) (offset-header+1),1,file); (void) fwrite(HuffmanTable,1,sizeof(HuffmanTable)/sizeof(*HuffmanTable),file); (void) fwrite(offset+1,(size_t) (data-offset),1,file); status=ferror(file) == -1 ? MagickFalse : MagickTrue; (void) fclose(file); buffer=(unsigned char *) RelinquishMagickMemory(buffer); if (status == MagickFalse) { char *message; (void) remove(read_info->filename); read_info=DestroyImageInfo(read_info); message=GetExceptionMessage(errno); (void) ThrowMagickException(&image->exception,GetMagickModule(), FileOpenError,"UnableToWriteFile","`%s': %s",image->filename,message); message=DestroyString(message); image=DestroyImageList(image); return((Image *) NULL); } /* Read JPEG image. */ image=ReadImage(read_info,exception); (void) RelinquishUniqueFileResource(read_info->filename); read_info=DestroyImageInfo(read_info); if (image == (Image *) NULL) return(GetFirstImageInList(image)); /* Correct image orientation. */ flipped_image=FlipImage(image,exception); if (flipped_image == (Image *) NULL) return(GetFirstImageInList(image)); image=DestroyImage(image); return(flipped_image); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r S F W I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterSFWImage() adds attributes for the SFW image format to % the list of supported formats. The attributes include the image format % tag, a method to read and/or write the format, whether the format % supports the saving of more than one frame to the same file or blob, % whether the format supports native in-memory I/O, and a brief % description of the format. % % The format of the RegisterSFWImage method is: % % unsigned long RegisterSFWImage(void) % */ ModuleExport unsigned long RegisterSFWImage(void) { MagickInfo *entry; entry=SetMagickInfo("SFW"); entry->decoder=(DecodeImageHandler *) ReadSFWImage; entry->magick=(IsImageFormatHandler *) IsSFW; entry->adjoin=MagickFalse; entry->description=ConstantString("Seattle Film Works"); entry->module=ConstantString("SFW"); (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r S F W I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterSFWImage() removes format registrations made by the % SFW module from the list of supported formats. % % The format of the UnregisterSFWImage method is: % % UnregisterSFWImage(void) % */ ModuleExport void UnregisterSFWImage(void) { (void) UnregisterMagickInfo("SFW"); }