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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% TTTTT H H U U M M BBBB N N AAA IIIII L %
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% T H H U U MM MM B B NN N A A I L %
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% T HHHHH U U M M M BBBB N N N AAAAA I L %
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% T H H U U M M B B N NN A A I L %
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% T H H UUU M M BBBB N N A A IIIII LLLLL %
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% %
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% %
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% Write EXIF Thumbnail To File. %
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% %
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% Software Design %
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% Cristy %
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% July 1992 %
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% %
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% %
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% Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
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% dedicated to making software imaging solutions freely available. %
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% %
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% You may not use this file except in compliance with the License. You may %
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% obtain a copy of the License at %
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% %
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% https://imagemagick.org/script/license.php %
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% %
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% Unless required by applicable law or agreed to in writing, software %
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% distributed under the License is distributed on an "AS IS" BASIS, %
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
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% See the License for the specific language governing permissions and %
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% limitations under the License. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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%
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*/
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/*
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Include declarations.
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*/
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#include "MagickCore/studio.h"
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#include "MagickCore/attribute.h"
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#include "MagickCore/blob.h"
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#include "MagickCore/blob-private.h"
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#include "MagickCore/constitute.h"
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#include "MagickCore/exception.h"
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#include "MagickCore/exception-private.h"
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#include "MagickCore/magick.h"
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#include "MagickCore/memory_.h"
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#include "MagickCore/module.h"
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#include "MagickCore/monitor.h"
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#include "MagickCore/monitor-private.h"
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#include "MagickCore/profile.h"
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#include "MagickCore/property.h"
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#include "MagickCore/quantum-private.h"
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#include "MagickCore/static.h"
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#include "MagickCore/string_.h"
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#include "MagickCore/string-private.h"
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/*
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Forward declarations.
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*/
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static MagickBooleanType
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WriteTHUMBNAILImage(const ImageInfo *,Image *,ExceptionInfo *);
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% R e g i s t e r T H U M B N A I L I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% RegisterTHUMBNAILImage() adds attributes for the THUMBNAIL image format to
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% the list of supported formats. The attributes include the image format
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% tag, a method to read and/or write the format, whether the format
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% supports the saving of more than one frame to the same file or blob,
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% whether the format supports native in-memory I/O, and a brief
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% description of the format.
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%
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% The format of the RegisterTHUMBNAILImage method is:
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%
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% size_t RegisterTHUMBNAILImage(void)
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%
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*/
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ModuleExport size_t RegisterTHUMBNAILImage(void)
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{
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MagickInfo
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*entry;
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entry=AcquireMagickInfo("THUMBNAIL","THUMBNAIL","EXIF Profile Thumbnail");
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entry->encoder=(EncodeImageHandler *) WriteTHUMBNAILImage;
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(void) RegisterMagickInfo(entry);
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return(MagickImageCoderSignature);
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% U n r e g i s t e r T H U M B N A I L I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% UnregisterTHUMBNAILImage() removes format registrations made by the
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% THUMBNAIL module from the list of supported formats.
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%
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% The format of the UnregisterTHUMBNAILImage method is:
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%
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% UnregisterTHUMBNAILImage(void)
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%
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*/
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ModuleExport void UnregisterTHUMBNAILImage(void)
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{
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(void) UnregisterMagickInfo("THUMBNAIL");
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% W r i t e T H U M B N A I L I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% WriteTHUMBNAILImage() extracts the EXIF thumbnail image and writes it.
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%
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% The format of the WriteTHUMBNAILImage method is:
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%
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% MagickBooleanType WriteTHUMBNAILImage(const ImageInfo *image_info,
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% Image *image,ExceptionInfo *exception)
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%
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% A description of each parameter follows.
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%
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% o image_info: the image info.
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%
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% o image: The image.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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static MagickBooleanType WriteTHUMBNAILImage(const ImageInfo *image_info,
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Image *image,ExceptionInfo *exception)
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{
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const char
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*property;
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const StringInfo
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*profile;
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Image
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*thumbnail_image;
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ImageInfo
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*write_info;
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MagickBooleanType
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status;
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ssize_t
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i;
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size_t
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length;
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ssize_t
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offset;
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unsigned char
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*q;
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profile=GetImageProfile(image,"exif");
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if (profile == (const StringInfo *) NULL)
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ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail");
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property=GetImageProperty(image,"exif:JPEGInterchangeFormat",exception);
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if (property == (const char *) NULL)
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ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail");
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offset=(ssize_t) StringToLong(property);
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if (offset < 0)
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ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail");
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property=GetImageProperty(image,"exif:JPEGInterchangeFormatLength",exception);
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if (property == (const char *) NULL)
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ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail");
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length=(size_t) StringToLong(property);
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q=GetStringInfoDatum(profile)+offset;
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for (i=offset; i < (ssize_t) GetStringInfoLength(profile) - 3; i++)
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{
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if (memcmp(q,"\377\330\377",3) == 0)
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break;
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q++;
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}
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if ((q > (GetStringInfoDatum(profile)+GetStringInfoLength(profile))) ||
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((ssize_t) length > (GetStringInfoDatum(profile)+GetStringInfoLength(profile)-q)))
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ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail");
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thumbnail_image=BlobToImage(image_info,q,length,exception);
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if (thumbnail_image == (Image *) NULL)
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return(MagickFalse);
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(void) SetImageType(thumbnail_image,thumbnail_image->alpha_trait ==
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UndefinedPixelTrait ? TrueColorType : TrueColorAlphaType,exception);
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(void) CopyMagickString(thumbnail_image->filename,image->filename,
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MagickPathExtent);
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write_info=CloneImageInfo(image_info);
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*write_info->magick='\0';
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(void) SetImageInfo(write_info,1,exception);
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if ((*write_info->magick == '\0') ||
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(LocaleCompare(write_info->magick,"THUMBNAIL") == 0))
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(void) FormatLocaleString(thumbnail_image->filename,MagickPathExtent,
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"miff:%s",write_info->filename);
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status=WriteImage(write_info,thumbnail_image,exception);
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thumbnail_image=DestroyImage(thumbnail_image);
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write_info=DestroyImageInfo(write_info);
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return(status);
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}
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