/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % 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 % % Cristy % % July 1992 % % % % % % Copyright 1999-2021 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 % % % % https://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 "MagickCore/studio.h" #include "MagickCore/attribute.h" #include "MagickCore/blob.h" #include "MagickCore/blob-private.h" #include "MagickCore/constitute.h" #include "MagickCore/exception.h" #include "MagickCore/exception-private.h" #include "MagickCore/magick.h" #include "MagickCore/memory_.h" #include "MagickCore/module.h" #include "MagickCore/monitor.h" #include "MagickCore/monitor-private.h" #include "MagickCore/profile.h" #include "MagickCore/property.h" #include "MagickCore/quantum-private.h" #include "MagickCore/static.h" #include "MagickCore/string_.h" #include "MagickCore/string-private.h" /* Forward declarations. */ static MagickBooleanType WriteTHUMBNAILImage(const ImageInfo *,Image *,ExceptionInfo *); /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % 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: % % size_t RegisterTHUMBNAILImage(void) % */ ModuleExport size_t RegisterTHUMBNAILImage(void) { MagickInfo *entry; entry=AcquireMagickInfo("THUMBNAIL","THUMBNAIL","EXIF Profile Thumbnail"); entry->encoder=(EncodeImageHandler *) WriteTHUMBNAILImage; (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,ExceptionInfo *exception) % % A description of each parameter follows. % % o image_info: the image info. % % o image: The image. % % o exception: return any errors or warnings in this structure. % */ static MagickBooleanType WriteTHUMBNAILImage(const ImageInfo *image_info, Image *image,ExceptionInfo *exception) { const char *property; const StringInfo *profile; Image *thumbnail_image; ImageInfo *write_info; MagickBooleanType status; ssize_t i; size_t length; ssize_t offset; unsigned char *q; profile=GetImageProfile(image,"exif"); if (profile == (const StringInfo *) NULL) ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail"); property=GetImageProperty(image,"exif:JPEGInterchangeFormat",exception); if (property == (const char *) NULL) ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail"); offset=(ssize_t) StringToLong(property); if (offset < 0) ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail"); property=GetImageProperty(image,"exif:JPEGInterchangeFormatLength",exception); if (property == (const char *) NULL) ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail"); length=(size_t) StringToLong(property); q=GetStringInfoDatum(profile)+offset; for (i=offset; i < (ssize_t) GetStringInfoLength(profile) - 3; i++) { if (memcmp(q,"\377\330\377",3) == 0) break; q++; } if ((q > (GetStringInfoDatum(profile)+GetStringInfoLength(profile))) || ((ssize_t) length > (GetStringInfoDatum(profile)+GetStringInfoLength(profile)-q))) ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail"); thumbnail_image=BlobToImage(image_info,q,length,exception); if (thumbnail_image == (Image *) NULL) return(MagickFalse); (void) SetImageType(thumbnail_image,thumbnail_image->alpha_trait == UndefinedPixelTrait ? TrueColorType : TrueColorAlphaType,exception); (void) CopyMagickString(thumbnail_image->filename,image->filename, MagickPathExtent); write_info=CloneImageInfo(image_info); *write_info->magick='\0'; (void) SetImageInfo(write_info,1,exception); if ((*write_info->magick == '\0') || (LocaleCompare(write_info->magick,"THUMBNAIL") == 0)) (void) FormatLocaleString(thumbnail_image->filename,MagickPathExtent, "miff:%s",write_info->filename); status=WriteImage(write_info,thumbnail_image,exception); thumbnail_image=DestroyImage(thumbnail_image); write_info=DestroyImageInfo(write_info); return(status); }