1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % TTTTT H H U U M M BBBB N N AAA IIIII L %
7 % T H H U U MM MM B B NN N A A I L %
8 % T HHHHH U U M M M BBBB N N N AAAAA I L %
9 % T H H U U M M B B N NN A A I L %
10 % T H H UUU M M BBBB N N A A IIIII LLLLL %
11 % %
12 % %
13 % Write EXIF Thumbnail To File. %
14 % %
15 % Software Design %
16 % Cristy %
17 % July 1992 %
18 % %
19 % %
20 % Copyright 1999-2016 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
22 % %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
25 % %
26 % http://www.imagemagick.org/script/license.php %
27 % %
28 % Unless required by applicable law or agreed to in writing, software %
29 % distributed under the License is distributed on an "AS IS" BASIS, %
30 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31 % See the License for the specific language governing permissions and %
32 % limitations under the License. %
33 % %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35 %
36 %
37 */
38
39 /*
40 Include declarations.
41 */
42 #include "MagickCore/studio.h"
43 #include "MagickCore/attribute.h"
44 #include "MagickCore/blob.h"
45 #include "MagickCore/blob-private.h"
46 #include "MagickCore/constitute.h"
47 #include "MagickCore/exception.h"
48 #include "MagickCore/exception-private.h"
49 #include "MagickCore/magick.h"
50 #include "MagickCore/memory_.h"
51 #include "MagickCore/module.h"
52 #include "MagickCore/monitor.h"
53 #include "MagickCore/monitor-private.h"
54 #include "MagickCore/profile.h"
55 #include "MagickCore/property.h"
56 #include "MagickCore/quantum-private.h"
57 #include "MagickCore/static.h"
58 #include "MagickCore/string_.h"
59 #include "MagickCore/string-private.h"
60
61 /*
62 Forward declarations.
63 */
64 static MagickBooleanType
65 WriteTHUMBNAILImage(const ImageInfo *,Image *,ExceptionInfo *);
66
67 /*
68 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
69 % %
70 % %
71 % %
72 % R e g i s t e r T H U M B N A I L I m a g e %
73 % %
74 % %
75 % %
76 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
77 %
78 % RegisterTHUMBNAILImage() adds attributes for the THUMBNAIL image format to
79 % the list of supported formats. The attributes include the image format
80 % tag, a method to read and/or write the format, whether the format
81 % supports the saving of more than one frame to the same file or blob,
82 % whether the format supports native in-memory I/O, and a brief
83 % description of the format.
84 %
85 % The format of the RegisterTHUMBNAILImage method is:
86 %
87 % size_t RegisterTHUMBNAILImage(void)
88 %
89 */
RegisterTHUMBNAILImage(void)90 ModuleExport size_t RegisterTHUMBNAILImage(void)
91 {
92 MagickInfo
93 *entry;
94
95 entry=AcquireMagickInfo("THUMBNAIL","THUMBNAIL","EXIF Profile Thumbnail");
96 entry->encoder=(EncodeImageHandler *) WriteTHUMBNAILImage;
97 (void) RegisterMagickInfo(entry);
98 return(MagickImageCoderSignature);
99 }
100
101 /*
102 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
103 % %
104 % %
105 % %
106 % U n r e g i s t e r T H U M B N A I L I m a g e %
107 % %
108 % %
109 % %
110 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
111 %
112 % UnregisterTHUMBNAILImage() removes format registrations made by the
113 % THUMBNAIL module from the list of supported formats.
114 %
115 % The format of the UnregisterTHUMBNAILImage method is:
116 %
117 % UnregisterTHUMBNAILImage(void)
118 %
119 */
UnregisterTHUMBNAILImage(void)120 ModuleExport void UnregisterTHUMBNAILImage(void)
121 {
122 (void) UnregisterMagickInfo("THUMBNAIL");
123 }
124
125 /*
126 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
127 % %
128 % %
129 % %
130 % W r i t e T H U M B N A I L I m a g e %
131 % %
132 % %
133 % %
134 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
135 %
136 % WriteTHUMBNAILImage() extracts the EXIF thumbnail image and writes it.
137 %
138 % The format of the WriteTHUMBNAILImage method is:
139 %
140 % MagickBooleanType WriteTHUMBNAILImage(const ImageInfo *image_info,
141 % Image *image,ExceptionInfo *exception)
142 %
143 % A description of each parameter follows.
144 %
145 % o image_info: the image info.
146 %
147 % o image: The image.
148 %
149 % o exception: return any errors or warnings in this structure.
150 %
151 */
WriteTHUMBNAILImage(const ImageInfo * image_info,Image * image,ExceptionInfo * exception)152 static MagickBooleanType WriteTHUMBNAILImage(const ImageInfo *image_info,
153 Image *image,ExceptionInfo *exception)
154 {
155 const char
156 *property;
157
158 const StringInfo
159 *profile;
160
161 Image
162 *thumbnail_image;
163
164 ImageInfo
165 *write_info;
166
167 MagickBooleanType
168 status;
169
170 register ssize_t
171 i;
172
173 size_t
174 length;
175
176 ssize_t
177 offset;
178
179 unsigned char
180 magick[MagickPathExtent];
181
182 profile=GetImageProfile(image,"exif");
183 if (profile == (const StringInfo *) NULL)
184 ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail");
185 property=GetImageProperty(image,"exif:JPEGInterchangeFormat",exception);
186 if (property == (const char *) NULL)
187 ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail");
188 offset=(ssize_t) StringToLong(property);
189 property=GetImageProperty(image,"exif:JPEGInterchangeFormatLength",exception);
190 if (property == (const char *) NULL)
191 ThrowWriterException(CoderError,"ImageDoesNotHaveAThumbnail");
192 length=(size_t) StringToLong(property);
193 (void) ResetMagickMemory(magick,0,sizeof(magick));
194 for (i=0; i < (ssize_t) length; i++)
195 {
196 magick[0]=magick[1];
197 magick[1]=magick[2];
198 magick[2]=GetStringInfoDatum(profile)[offset+i];
199 if (memcmp(magick,"\377\330\377",3) == 0)
200 break;
201 }
202 thumbnail_image=BlobToImage(image_info,GetStringInfoDatum(profile)+offset+i-2,
203 length,exception);
204 if (thumbnail_image == (Image *) NULL)
205 return(MagickFalse);
206 (void) SetImageType(thumbnail_image,thumbnail_image->alpha_trait ==
207 UndefinedPixelTrait ? TrueColorType : TrueColorAlphaType,exception);
208 (void) CopyMagickString(thumbnail_image->filename,image->filename,
209 MagickPathExtent);
210 write_info=CloneImageInfo(image_info);
211 *write_info->magick='\0';
212 (void) SetImageInfo(write_info,1,exception);
213 if ((*write_info->magick == '\0') ||
214 (LocaleCompare(write_info->magick,"THUMBNAIL") == 0))
215 (void) FormatLocaleString(thumbnail_image->filename,MagickPathExtent,
216 "miff:%s",write_info->filename);
217 status=WriteImage(write_info,thumbnail_image,exception);
218 thumbnail_image=DestroyImage(thumbnail_image);
219 write_info=DestroyImageInfo(write_info);
220 return(status);
221 }
222