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ImageMagick-6.1.1/coders/label.c File Reference

#include "magick/studio.h"
#include "magick/annotate.h"
#include "magick/blob.h"
#include "magick/blob_private.h"
#include "magick/draw.h"
#include "magick/error.h"
#include "magick/error_private.h"
#include "magick/image.h"
#include "magick/image_private.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/utility.h"

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Go to the source code of this file.

Functions

Image * ReadLABELImage (const ImageInfo *image_info, ExceptionInfo *exception)
ModuleExport void RegisterLABELImage (void)
ModuleExport void UnregisterLABELImage (void)

Function Documentation

Image* ReadLABELImage (  const ImageInfo *  image_info,
ExceptionInfo *  exception
)  [static]
 

Definition at line 86 of file label.c.

References AcquireString(), AllocateImage(), AnnotateImage(), _TypeMetric::ascent, assert, CloneDrawInfo(), CoderError, _Image::columns, _ImageInfo::debug, _TypeMetric::descent, DestroyDrawInfo(), _ImageInfo::filename, _DrawInfo::fill, FormatMagickString(), _DrawInfo::geometry, GetFirstImageInList(), GetMagickModule, GetTypeMetrics(), LogMagickEvent(), MagickBooleanType, MagickFalse, MagickSignature, _TypeMetric::max_advance, MaxTextExtent, OpaqueOpacity, _ImageInfo::pen, _DrawInfo::pointsize, _Image::rows, SetImage(), _ExceptionInfo::signature, _ImageInfo::signature, _DrawInfo::text, ThrowReaderException, TraceEvent, TranslateText(), TypeError, and _TypeMetric::width.

Referenced by RegisterLABELImage(). 

00088 {
00089   char
00090     geometry[MaxTextExtent];
00091 
00092   DrawInfo
00093     *draw_info;
00094 
00095   Image
00096     *image;
00097 
00098   MagickBooleanType
00099     status;
00100 
00101   TypeMetric
00102     metrics;
00103 
00104   unsigned long
00105     height,
00106     width;
00107 
00108   /*
00109     Initialize Image structure.
00110   */
00111   assert(image_info != (const ImageInfo *) NULL);
00112   assert(image_info->signature == MagickSignature);
00113   if (image_info->debug != MagickFalse)
00114     (void) LogMagickEvent(TraceEvent,GetMagickModule(),image_info->filename);
00115   assert(exception != (ExceptionInfo *) NULL);
00116   assert(exception->signature == MagickSignature);
00117   image=AllocateImage(image_info);
00118   draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
00119   draw_info->fill=image_info->pen;
00120   draw_info->text=TranslateText(image_info,image,image_info->filename);
00121   if (draw_info->text == (char *) NULL)
00122     ThrowReaderException(CoderError,"UnableToTranslateText");
00123   if ((image->columns != 0) || (image->rows != 0))
00124     {
00125       /*
00126         Fit label to canvas size.
00127       */
00128       status=GetTypeMetrics(image,draw_info,&metrics);
00129       for ( ; status != MagickFalse; draw_info->pointsize*=2)
00130       {
00131         width=(unsigned long) (metrics.width+metrics.max_advance/2+0.5);
00132         height=(unsigned long) (metrics.ascent-metrics.descent+0.5);
00133         if (((image->columns != 0) && (width >= image->columns)) ||
00134             ((image->rows != 0) && (height >= image->rows)))
00135           break;
00136         status=GetTypeMetrics(image,draw_info,&metrics);
00137       }
00138       for ( ; status != MagickFalse; draw_info->pointsize--)
00139       {
00140         width=(unsigned long) (metrics.width+metrics.max_advance/2+0.5);
00141         height=(unsigned long) (metrics.ascent-metrics.descent+0.5);
00142         if ((image->columns != 0) && (width <= image->columns) &&
00143            ((image->rows == 0) || (height <= image->rows)))
00144           break;
00145         if ((image->rows != 0) && (height <= image->rows) &&
00146            ((image->columns == 0) || (width <= image->columns)))
00147           break;
00148         if (draw_info->pointsize < 2.0)
00149           break;
00150         status=GetTypeMetrics(image,draw_info,&metrics);
00151       }
00152     }
00153   status=GetTypeMetrics(image,draw_info,&metrics);
00154   if (status == MagickFalse)
00155     ThrowReaderException(TypeError,"UnableToGetTypeMetrics");
00156   (void) FormatMagickString(geometry,MaxTextExtent,"+%g+%g",
00157     metrics.max_advance/4,metrics.ascent);
00158   if (image->columns == 0)
00159     image->columns=(unsigned long) (metrics.width+metrics.max_advance/2+0.5);
00160   if (image->rows == 0)
00161     {
00162       image->rows=(unsigned long) (metrics.ascent-metrics.descent+0.5);
00163       (void) FormatMagickString(geometry,MaxTextExtent,"+%g+%g",
00164         image->columns/2.0-metrics.width/2.0,metrics.ascent);
00165     }
00166   draw_info->geometry=AcquireString(geometry);
00167   SetImage(image,OpaqueOpacity);
00168   (void) AnnotateImage(image,draw_info);
00169   draw_info=DestroyDrawInfo(draw_info);
00170   return(GetFirstImageInList(image));
00171 }

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ModuleExport void RegisterLABELImage (  void   ) 
 

Definition at line 196 of file label.c.

References AcquireString(), _MagickInfo::adjoin, _MagickInfo::decoder, DecoderHandler, _MagickInfo::description, MagickFalse, _MagickInfo::module, ModuleExport, ReadLABELImage(), RegisterMagickInfo(), and SetMagickInfo().

Referenced by RegisterStaticModules(). 

00197 {
00198   MagickInfo
00199     *entry;
00200 
00201   entry=SetMagickInfo("LABEL");
00202   entry->decoder=(DecoderHandler *) ReadLABELImage;
00203   entry->adjoin=MagickFalse;
00204   entry->description=AcquireString("Image label");
00205   entry->module=AcquireString("LABEL");
00206   (void) RegisterMagickInfo(entry);
00207 }

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ModuleExport void UnregisterLABELImage (  void   ) 
 

Definition at line 228 of file label.c.

References ModuleExport, and UnregisterMagickInfo().

Referenced by UnregisterStaticModules(). 

00229 {
00230   (void) UnregisterMagickInfo("LABEL");
00231 }

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