2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
10 % LLLLL A A BBBB EEEEE LLLLL %
13 % Read ASCII String As An Image. %
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/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 (((image->columns != 0) || (image->rows != 0)) &&
134 (image_info->pointsize == 0.0))
137 Fit label to canvas size.
139 status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
140 for ( ; status != MagickFalse; draw_info->pointsize*=2.0)
142 width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
143 height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
144 if (((image->columns != 0) && (width >= image->columns)) ||
145 ((image->rows != 0) && (height >= image->rows)))
147 status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
149 draw_info->pointsize/=2.0;
150 for ( ; status != MagickFalse; draw_info->pointsize--)
152 width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
153 height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
154 if ((image->columns != 0) && (width < image->columns) &&
155 ((image->rows == 0) || (height < image->rows)))
157 if ((image->rows != 0) && (height < image->rows) &&
158 ((image->columns == 0) || (width < image->columns)))
160 if (draw_info->pointsize < 2.0)
162 status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
165 status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
166 if (status == MagickFalse)
168 image=DestroyImageList(image);
169 return((Image *) NULL);
171 if (image->columns == 0)
172 image->columns=(size_t) (metrics.width+draw_info->stroke_width+1.5);
173 if (image->columns == 0)
174 image->columns=(size_t) (draw_info->pointsize+draw_info->stroke_width+1.5);
175 if (draw_info->gravity == UndefinedGravity)
177 (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
178 -metrics.bounds.x1+draw_info->stroke_width/2.0,metrics.ascent+
179 draw_info->stroke_width/2.0);
180 (void) CloneString(&draw_info->geometry,geometry);
182 if (draw_info->direction == RightToLeftDirection)
184 if (draw_info->direction == RightToLeftDirection)
185 (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
186 image->columns-(metrics.bounds.x2+draw_info->stroke_width/2.0),
187 draw_info->stroke_width/2.0);
188 (void) CloneString(&draw_info->geometry,geometry);
190 if (image->rows == 0)
191 image->rows=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
192 if (image->rows == 0)
193 image->rows=(size_t) floor(draw_info->pointsize+draw_info->stroke_width+
195 if (SetImageBackgroundColor(image,exception) == MagickFalse)
197 image=DestroyImageList(image);
198 return((Image *) NULL);
200 (void) AnnotateImage(image,draw_info,exception);
201 if (image_info->pointsize == 0.0)
204 pointsize[MaxTextExtent];
206 (void) FormatLocaleString(pointsize,MaxTextExtent,"%.20g",
207 draw_info->pointsize);
208 (void) SetImageProperty(image,"label:pointsize",pointsize,exception);
210 draw_info=DestroyDrawInfo(draw_info);
211 return(GetFirstImageInList(image));
215 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
219 % R e g i s t e r L A B E L I m a g e %
223 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
225 % RegisterLABELImage() adds properties for the LABEL image format to
226 % the list of supported formats. The properties include the image format
227 % tag, a method to read and/or write the format, whether the format
228 % supports the saving of more than one frame to the same file or blob,
229 % whether the format supports native in-memory I/O, and a brief
230 % description of the format.
232 % The format of the RegisterLABELImage method is:
234 % size_t RegisterLABELImage(void)
237 ModuleExport size_t RegisterLABELImage(void)
242 entry=SetMagickInfo("LABEL");
243 entry->decoder=(DecodeImageHandler *) ReadLABELImage;
244 entry->adjoin=MagickFalse;
245 entry->format_type=ImplicitFormatType;
246 entry->description=ConstantString("Image label");
247 entry->module=ConstantString("LABEL");
248 (void) RegisterMagickInfo(entry);
249 return(MagickImageCoderSignature);
253 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
257 % U n r e g i s t e r L A B E L I m a g e %
261 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
263 % UnregisterLABELImage() removes format registrations made by the
264 % LABEL module from the list of supported formats.
266 % The format of the UnregisterLABELImage method is:
268 % UnregisterLABELImage(void)
271 ModuleExport void UnregisterLABELImage(void)
273 (void) UnregisterMagickInfo("LABEL");