2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6 % CCCC AAA PPPP TTTTT IIIII OOO N N %
7 % C A A P P T I O O NN N %
8 % C AAAAA PPPP T I O O N N N %
9 % C A A P T I O O N NN %
10 % CCCC A A P T IIIII OOO N N %
13 % Read Text Caption. %
20 % Copyright 1999-2012 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
26 % http://www.imagemagick.org/script/license.php %
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. %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
42 #include "MagickCore/studio.h"
43 #include "MagickCore/annotate.h"
44 #include "MagickCore/blob.h"
45 #include "MagickCore/blob-private.h"
46 #include "MagickCore/composite-private.h"
47 #include "MagickCore/draw.h"
48 #include "MagickCore/draw-private.h"
49 #include "MagickCore/exception.h"
50 #include "MagickCore/exception-private.h"
51 #include "MagickCore/image.h"
52 #include "MagickCore/image-private.h"
53 #include "MagickCore/list.h"
54 #include "MagickCore/magick.h"
55 #include "MagickCore/memory_.h"
56 #include "MagickCore/module.h"
57 #include "MagickCore/option.h"
58 #include "MagickCore/property.h"
59 #include "MagickCore/quantum-private.h"
60 #include "MagickCore/static.h"
61 #include "MagickCore/string_.h"
62 #include "MagickCore/string-private.h"
63 #include "MagickCore/utility.h"
66 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
70 % R e a d C A P T I O N I m a g e %
74 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
76 % ReadCAPTIONImage() reads a CAPTION image file and returns it. It
77 % allocates the memory necessary for the new Image structure and returns a
78 % pointer to the new image.
80 % The format of the ReadCAPTIONImage method is:
82 % Image *ReadCAPTIONImage(const ImageInfo *image_info,
83 % ExceptionInfo *exception)
85 % A description of each parameter follows:
87 % o image_info: the image info.
89 % o exception: return any errors or warnings in this structure.
92 static Image *ReadCAPTIONImage(const ImageInfo *image_info,
93 ExceptionInfo *exception)
97 geometry[MaxTextExtent],
124 Initialize Image structure.
126 assert(image_info != (const ImageInfo *) NULL);
127 assert(image_info->signature == MagickSignature);
128 if (image_info->debug != MagickFalse)
129 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
130 image_info->filename);
131 assert(exception != (ExceptionInfo *) NULL);
132 assert(exception->signature == MagickSignature);
133 image=AcquireImage(image_info,exception);
134 if (image->columns == 0)
135 ThrowReaderException(OptionError,"MustSpecifyImageSize");
136 (void) ResetImagePage(image,"0x0+0+0");
140 option=GetImageOption(image_info,"filename");
141 if (option == (const char *) NULL)
142 property=InterpretImageProperties(image_info,image,image_info->filename,
145 if (LocaleNCompare(option,"caption:",8) == 0)
146 property=InterpretImageProperties(image_info,image,option+8,exception);
148 property=InterpretImageProperties(image_info,image,option,exception);
149 (void) SetImageProperty(image,"caption",property,exception);
150 property=DestroyString(property);
151 caption=ConstantString(GetImageProperty(image,"caption",exception));
152 draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
153 (void) CloneString(&draw_info->text,caption);
154 gravity=GetImageOption(image_info,"gravity");
155 if (gravity != (char *) NULL)
156 draw_info->gravity=(GravityType) ParseCommandOption(MagickGravityOptions,
157 MagickFalse,gravity);
158 if ((*caption != '\0') && (image->rows != 0) &&
159 (image_info->pointsize == 0.0))
165 Scale text to fit bounding box.
169 text=AcquireString(caption);
170 i=FormatMagickCaption(image,draw_info,MagickFalse,&metrics,&text,
172 (void) CloneString(&draw_info->text,text);
173 text=DestroyString(text);
174 (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
175 -metrics.bounds.x1,metrics.ascent);
176 if (draw_info->gravity == UndefinedGravity)
177 (void) CloneString(&draw_info->geometry,geometry);
178 status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
180 width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
181 height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
182 if ((width > (image->columns+1)) || (height > (image->rows+1)))
184 draw_info->pointsize*=2.0;
186 draw_info->pointsize/=2.0;
189 text=AcquireString(caption);
190 i=FormatMagickCaption(image,draw_info,MagickFalse,&metrics,&text,
192 (void) CloneString(&draw_info->text,text);
193 text=DestroyString(text);
194 (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
195 -metrics.bounds.x1,metrics.ascent);
196 if (draw_info->gravity == UndefinedGravity)
197 (void) CloneString(&draw_info->geometry,geometry);
198 status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
199 width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
200 height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
201 if ((width > (image->columns+1)) || (height > (image->rows+1)))
203 draw_info->pointsize++;
205 draw_info->pointsize--;
207 i=FormatMagickCaption(image,draw_info,MagickTrue,&metrics,&caption,exception);
208 if (image->rows == 0)
209 image->rows=(size_t) ((i+1)*(metrics.ascent-metrics.descent+
210 draw_info->interline_spacing+draw_info->stroke_width)+0.5);
211 if (image->rows == 0)
212 image->rows=(size_t) ((i+1)*draw_info->pointsize+
213 draw_info->interline_spacing+draw_info->stroke_width+0.5);
214 if (SetImageBackgroundColor(image,exception) == MagickFalse)
216 image=DestroyImageList(image);
217 return((Image *) NULL);
222 (void) CloneString(&draw_info->text,caption);
223 status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
224 if ((draw_info->gravity != UndefinedGravity) &&
225 (draw_info->direction != RightToLeftDirection))
226 image->page.x=(ssize_t) (metrics.bounds.x1-draw_info->stroke_width/2.0);
229 (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
230 -metrics.bounds.x1+draw_info->stroke_width/2.0,metrics.ascent+
231 draw_info->stroke_width/2.0);
232 if (draw_info->direction == RightToLeftDirection)
233 (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
234 image->columns-(metrics.bounds.x2+draw_info->stroke_width/2.0),
235 metrics.ascent+draw_info->stroke_width/2.0);
236 draw_info->geometry=AcquireString(geometry);
238 status=AnnotateImage(image,draw_info,exception);
239 draw_info=DestroyDrawInfo(draw_info);
240 caption=DestroyString(caption);
241 if (status == MagickFalse)
243 image=DestroyImageList(image);
244 return((Image *) NULL);
246 return(GetFirstImageInList(image));
250 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
254 % R e g i s t e r C A P T I O N I m a g e %
258 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
260 % RegisterCAPTIONImage() adds attributes for the CAPTION image format to
261 % the list of supported formats. The attributes include the image format
262 % tag, a method to read and/or write the format, whether the format
263 % supports the saving of more than one frame to the same file or blob,
264 % whether the format supports native in-memory I/O, and a brief
265 % description of the format.
267 % The format of the RegisterCAPTIONImage method is:
269 % size_t RegisterCAPTIONImage(void)
272 ModuleExport size_t RegisterCAPTIONImage(void)
277 entry=SetMagickInfo("CAPTION");
278 entry->decoder=(DecodeImageHandler *) ReadCAPTIONImage;
279 entry->description=ConstantString("Caption");
280 entry->adjoin=MagickFalse;
281 entry->module=ConstantString("CAPTION");
282 (void) RegisterMagickInfo(entry);
283 return(MagickImageCoderSignature);
287 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
291 % U n r e g i s t e r C A P T I O N I m a g e %
295 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
297 % UnregisterCAPTIONImage() removes format registrations made by the
298 % CAPTION module from the list of supported formats.
300 % The format of the UnregisterCAPTIONImage method is:
302 % UnregisterCAPTIONImage(void)
305 ModuleExport void UnregisterCAPTIONImage(void)
307 (void) UnregisterMagickInfo("CAPTION");