/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % TTTTT H H U U M M BBBB N N AAA IIIII L % % T H H U U MM MM B B NN N A A I L % % T HHHHH U U M M M BBBB N N N AAAAA I L % % T H H U U M M B B N NN A A I L % % T H H UUU M M BBBB N N A A IIIII LLLLL % % % % % % Write EXIF Thumbnail To File. % % % % Software Design % % John Cristy % % July 1992 % % % % % % Copyright 1999-2010 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/magick.h" #include "magick/memory_.h" #include "magick/module.h" #include "magick/monitor.h" #include "magick/monitor-private.h" #include "magick/profile.h" #include "magick/property.h" #include "magick/quantum-private.h" #include "magick/static.h" #include "magick/string_.h" #include "magick/string-private.h" /* Forward declarations. */ static MagickBooleanType WriteTHUMBNAILImage(const ImageInfo *,Image *); /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r T H U M B N A I L I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterTHUMBNAILImage() adds attributes for the THUMBNAIL 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 RegisterTHUMBNAILImage method is: % % unsigned long RegisterTHUMBNAILImage(void) % */ ModuleExport unsigned long RegisterTHUMBNAILImage(void) { MagickInfo *entry; entry=SetMagickInfo("THUMBNAIL"); entry->encoder=(EncodeImageHandler *) WriteTHUMBNAILImage; entry->description=ConstantString("EXIF Profile Thumbnail"); entry->module=ConstantString("THUMBNAIL"); (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r T H U M B N A I L I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterTHUMBNAILImage() removes format registrations made by the % THUMBNAIL module from the list of supported formats. % % The format of the UnregisterTHUMBNAILImage method is: % % UnregisterTHUMBNAILImage(void) % */ ModuleExport void UnregisterTHUMBNAILImage(void) { (void) UnregisterMagickInfo("THUMBNAIL"); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % W r i t e T H U M B N A I L I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % WriteTHUMBNAILImage() extracts the EXIF thumbnail image and writes it. % % The format of the WriteTHUMBNAILImage method is: % % MagickBooleanType WriteTHUMBNAILImage(const ImageInfo *image_info, % Image *image) % % A description of each parameter follows. % % o image_info: the image info. % % o image: The image. % */ static MagickBooleanType WriteTHUMBNAILImage(const ImageInfo *image_info, Image *image) { const char *property; const StringInfo *profile; Image *thumbnail_image; ImageInfo *write_info; MagickBooleanType status; register long i; ssize_t offset; size_t length; unsigned char magick[MaxTextExtent]; profile=GetImageProfile(image,"exif"); if (profile == (const StringInfo *) NULL) ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail"); property=GetImageProperty(image,"exif:JPEGInterchangeFormat"); if (property == (const char *) NULL) ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail"); offset=(ssize_t) StringToLong(property); property=GetImageProperty(image,"exif:JPEGInterchangeFormatLength"); if (property == (const char *) NULL) ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail"); length=(size_t) StringToLong(property); (void) ResetMagickMemory(magick,0,sizeof(magick)); for (i=0; i < (long) length; i++) { magick[0]=magick[1]; magick[1]=magick[2]; magick[2]=GetStringInfoDatum(profile)[offset+i]; if (memcmp(magick,"\377\330\377",3) == 0) break; } thumbnail_image=BlobToImage(image_info,GetStringInfoDatum(profile)+offset+i-2, length,&image->exception); if (thumbnail_image == (Image *) NULL) return(MagickFalse); (void) SetImageType(thumbnail_image,thumbnail_image->matte == MagickFalse ? TrueColorType : TrueColorMatteType); (void) CopyMagickString(thumbnail_image->filename,image->filename, MaxTextExtent); write_info=CloneImageInfo(image_info); (void) SetImageInfo(write_info,1,&image->exception); if (LocaleCompare(write_info->magick,"THUMBNAIL") == 0) (void) FormatMagickString(thumbnail_image->filename,MaxTextExtent, "miff:%s",write_info->filename); status=WriteImage(write_info,thumbnail_image); thumbnail_image=DestroyImage(thumbnail_image); write_info=DestroyImageInfo(write_info); return(status); }