2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
10 % LLLLL A A BBBB EEEEE LLLLL %
13 % Read ASCII String As An Image. %
20 % Copyright 1999-2013 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/draw.h"
47 #include "MagickCore/exception.h"
48 #include "MagickCore/exception-private.h"
49 #include "MagickCore/image.h"
50 #include "MagickCore/image-private.h"
51 #include "MagickCore/list.h"
52 #include "MagickCore/magick.h"
53 #include "MagickCore/memory_.h"
54 #include "MagickCore/property.h"
55 #include "MagickCore/quantum-private.h"
56 #include "MagickCore/static.h"
57 #include "MagickCore/string_.h"
58 #include "MagickCore/module.h"
59 #include "MagickCore/utility.h"
62 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
66 % R e a d L A B E L I m a g e %
70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
72 % ReadLABELImage() reads a LABEL image file and returns it. It
73 % allocates the memory necessary for the new Image structure and returns a
74 % pointer to the new image.
76 % The format of the ReadLABELImage method is:
78 % Image *ReadLABELImage(const ImageInfo *image_info,
79 % ExceptionInfo *exception)
81 % A description of each parameter follows:
83 % o image_info: the image info.
85 % o exception: return any errors or warnings in this structure.
88 static Image *ReadLABELImage(const ImageInfo *image_info,
89 ExceptionInfo *exception)
92 geometry[MaxTextExtent],
115 Initialize Image structure.
117 assert(image_info != (const ImageInfo *) NULL);
118 assert(image_info->signature == MagickSignature);
119 if (image_info->debug != MagickFalse)
120 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
121 image_info->filename);
122 assert(exception != (ExceptionInfo *) NULL);
123 assert(exception->signature == MagickSignature);
124 image=AcquireImage(image_info,exception);
125 (void) ResetImagePage(image,"0x0+0+0");
126 property=InterpretImageProperties(image_info,image,image_info->filename,
128 (void) SetImageProperty(image,"label",property,exception);
129 property=DestroyString(property);
130 label=GetImageProperty(image,"label",exception);
131 draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
132 draw_info->text=ConstantString(label);
133 if ((*label != '\0') && (image->rows != 0) && (image_info->pointsize == 0.0))
140 Auto fit text into bounding box.
142 status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
143 for ( ; ; draw_info->pointsize*=2.0)
145 (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
146 -metrics.bounds.x1,metrics.ascent);
147 if (draw_info->gravity == UndefinedGravity)
148 (void) CloneString(&draw_info->geometry,geometry);
149 status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
151 width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
152 height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
153 if ((width > image->columns) && (height > image->rows))
155 if ((width > (image->columns << 1)) || (height > (image->rows << 1)))
158 high=draw_info->pointsize/2.0;
160 while ((high-low) > 1.0)
162 draw_info->pointsize=(low+high)/2.0;
163 (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
164 -metrics.bounds.x1,metrics.ascent);
165 if (draw_info->gravity == UndefinedGravity)
166 (void) CloneString(&draw_info->geometry,geometry);
167 status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
168 width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
169 height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
170 if ((width <= image->columns) && (height <= image->rows))
171 low=draw_info->pointsize+1.0;
173 high=draw_info->pointsize-1.0;
175 for (draw_info->pointsize=(low+high)/2.0; (high-low) > 1.0; )
177 (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
178 -metrics.bounds.x1,metrics.ascent);
179 if (draw_info->gravity == UndefinedGravity)
180 (void) CloneString(&draw_info->geometry,geometry);
181 status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
182 width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
183 height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
184 if ((width <= image->columns) && (height <= image->rows))
186 draw_info->pointsize--;
188 draw_info->pointsize=floor(draw_info->pointsize+0.5);
190 status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
191 if (status == MagickFalse)
193 image=DestroyImageList(image);
194 return((Image *) NULL);
196 if (image->columns == 0)
197 image->columns=(size_t) (metrics.width+draw_info->stroke_width+1.5);
198 if (image->columns == 0)
199 image->columns=(size_t) (draw_info->pointsize+draw_info->stroke_width+1.5);
200 if (draw_info->gravity == UndefinedGravity)
202 (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
203 -metrics.bounds.x1+draw_info->stroke_width/2.0,metrics.ascent+
204 draw_info->stroke_width/2.0);
205 (void) CloneString(&draw_info->geometry,geometry);
207 if (draw_info->direction == RightToLeftDirection)
209 if (draw_info->direction == RightToLeftDirection)
210 (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
211 image->columns-(metrics.bounds.x2+draw_info->stroke_width/2.0),
212 metrics.ascent+draw_info->stroke_width/2.0);
213 (void) CloneString(&draw_info->geometry,geometry);
215 if (image->rows == 0)
216 image->rows=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
217 if (image->rows == 0)
218 image->rows=(size_t) floor(draw_info->pointsize+draw_info->stroke_width+
220 if (SetImageBackgroundColor(image,exception) == MagickFalse)
222 image=DestroyImageList(image);
223 return((Image *) NULL);
225 (void) AnnotateImage(image,draw_info,exception);
226 if (image_info->pointsize == 0.0)
229 pointsize[MaxTextExtent];
231 (void) FormatLocaleString(pointsize,MaxTextExtent,"%.20g",
232 draw_info->pointsize);
233 (void) SetImageProperty(image,"label:pointsize",pointsize,exception);
235 draw_info=DestroyDrawInfo(draw_info);
236 return(GetFirstImageInList(image));
240 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
244 % R e g i s t e r L A B E L I m a g e %
248 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
250 % RegisterLABELImage() adds properties for the LABEL image format to
251 % the list of supported formats. The properties include the image format
252 % tag, a method to read and/or write the format, whether the format
253 % supports the saving of more than one frame to the same file or blob,
254 % whether the format supports native in-memory I/O, and a brief
255 % description of the format.
257 % The format of the RegisterLABELImage method is:
259 % size_t RegisterLABELImage(void)
262 ModuleExport size_t RegisterLABELImage(void)
267 entry=SetMagickInfo("LABEL");
268 entry->decoder=(DecodeImageHandler *) ReadLABELImage;
269 entry->adjoin=MagickFalse;
270 entry->format_type=ImplicitFormatType;
271 entry->description=ConstantString("Image label");
272 entry->module=ConstantString("LABEL");
273 (void) RegisterMagickInfo(entry);
274 return(MagickImageCoderSignature);
278 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
282 % U n r e g i s t e r L A B E L I m a g e %
286 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
288 % UnregisterLABELImage() removes format registrations made by the
289 % LABEL module from the list of supported formats.
291 % The format of the UnregisterLABELImage method is:
293 % UnregisterLABELImage(void)
296 ModuleExport void UnregisterLABELImage(void)
298 (void) UnregisterMagickInfo("LABEL");