caption.c File Reference Documentation Index Page

Function Documentation

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

Definition at line 85 of file caption.c.

References AcquireString(), AllocateImage(), AnnotateImage(), _TypeMetric::ascent, assert, CloneDrawInfo(), CloseBlob(), _Image::columns, CopyMagickString(), _ImageInfo::debug, _TypeMetric::descent, DestroyDrawInfo(), DestroyImageList(), DrawInfo, _Image::filename, _ImageInfo::filename, _DrawInfo::fill, FormatMagickString(), _DrawInfo::geometry, GetFirstImageInList(), GetMagickModule, GetTypeMetrics(), LogMagickEvent(), MagickBooleanType, MagickFalse, MagickSignature, _TypeMetric::max_advance, MaxTextExtent, OpaqueOpacity, OpenBlob(), OptionError, _ImageInfo::pen, ReadBinaryBlobMode, ReadBlobString(), RelinquishMagickMemory(), ResizeMagickMemory(), ResourceLimitError, _Image::rows, SetImage(), _ExceptionInfo::signature, _ImageInfo::signature, _DrawInfo::text, ThrowReaderException, TraceEvent, TypeError, TypeMetric, and _TypeMetric::width.

Referenced by RegisterCAPTIONImage().

00087 {
00088   char
00089     *caption,
00090     geometry[MaxTextExtent];
00091 
00092   DrawInfo
00093     *draw_info;
00094 
00095   Image
00096     *image;
00097 
00098   MagickBooleanType
00099     status;
00100 
00101   register char
00102     *p,
00103     *q;
00104 
00105   register long
00106     i;
00107 
00108   TypeMetric
00109     metrics;
00110 
00111   /*
00112     Initialize Image structure.
00113   */
00114   assert(image_info != (const ImageInfo *) NULL);
00115   assert(image_info->signature == MagickSignature);
00116   if (image_info->debug != MagickFalse)
00117     (void) LogMagickEvent(TraceEvent,GetMagickModule(),image_info->filename);
00118   assert(exception != (ExceptionInfo *) NULL);
00119   assert(exception->signature == MagickSignature);
00120   image=AllocateImage(image_info);
00121   if (image->columns == 0)
00122     ThrowReaderException(OptionError,"MustSpecifyImageSize");
00123   if (*image_info->filename != '@')
00124     caption=AcquireString(image_info->filename);
00125   else
00126     {
00127       size_t
00128         length;
00129 
00130       /*
00131         Read caption.
00132       */
00133       (void) CopyMagickString(image->filename,image_info->filename+1,
00134         MaxTextExtent-2);
00135       status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
00136       if (status == MagickFalse)
00137         {
00138           DestroyImageList(image);
00139           return((Image *) NULL);
00140         }
00141       length=MaxTextExtent;
00142       caption=AcquireString((char *) NULL);
00143       p=caption;
00144       while (ReadBlobString(image,p) != (char *) NULL)
00145       {
00146         p+=strlen(p);
00147         if ((size_t) (p-caption+MaxTextExtent) < length)
00148           continue;
00149         length<<=1;
00150         caption=(char *) ResizeMagickMemory(caption,
00151           (length+MaxTextExtent)*sizeof(*caption));
00152         if (caption == (char *) NULL)
00153           break;
00154         p=caption+strlen(caption);
00155       }
00156       if (caption == (char *) NULL)
00157         ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
00158       CloseBlob(image);
00159     }
00160   /*
00161     Format caption.
00162   */
00163   draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
00164   draw_info->fill=image_info->pen;
00165   draw_info->text=AcquireString(caption);
00166   p=caption;
00167   q=draw_info->text;
00168   for (i=0; *p != '\0'; p++)
00169   {
00170     *q++=(*p);
00171     *q='\0';
00172     status=GetTypeMetrics(image,draw_info,&metrics);
00173     if (status == MagickFalse)
00174       ThrowReaderException(TypeError,"UnableToGetTypeMetrics");
00175     if ((metrics.width+metrics.max_advance/2) < (double) image->columns)
00176       continue;
00177     for (p--; (isspace((int) ((unsigned char) *p)) == 0) && (p > caption); p--);
00178     *p++='\n';
00179     q=draw_info->text;
00180     i++;
00181   }
00182   if (image->rows == 0)
00183     image->rows=(unsigned long) ((i+1)*(metrics.ascent-metrics.descent));
00184   SetImage(image,OpaqueOpacity);
00185   /*
00186     Draw caption.
00187   */
00188   (void) strcpy(draw_info->text,caption);
00189   (void) FormatMagickString(geometry,MaxTextExtent,"+%g+%g",
00190     metrics.max_advance/4,metrics.ascent);
00191   draw_info->geometry=AcquireString(geometry);
00192   (void) AnnotateImage(image,draw_info);
00193   draw_info=DestroyDrawInfo(draw_info);
00194   caption=(char *) RelinquishMagickMemory(caption);
00195   return(GetFirstImageInList(image));
00196 }

Here is the call graph for this function:

00222 { 00223 MagickInfo 00224 *entry; 00225 00226 entry=SetMagickInfo("CAPTION"); 00227 entry->decoder=(DecoderHandler *) ReadCAPTIONImage; 00228 entry->adjoin=MagickFalse; 00229 entry->description=AcquireString("Image caption"); 00230 entry->module=AcquireString("CAPTION"); 00231 (void) RegisterMagickInfo(entry); 00232 }

ModuleExport void UnregisterCAPTIONImage

(

void

)

Definition at line 253 of file caption.c.

References ModuleExport, and UnregisterMagickInfo().

Referenced by UnregisterStaticModules().

00254 {
00255   (void) UnregisterMagickInfo("CAPTION");
00256 }

Here is the call graph for this function:

Generated on Mon Oct 25 13:42:29 2004 for ImageMagick by

1.3.7

ImageMagick Studio LLC


Functions
Image *	ReadCAPTIONImage (const ImageInfo image_info, ExceptionInfo exception)
ModuleExport void	RegisterCAPTIONImage (void)
ModuleExport void	UnregisterCAPTIONImage (void)

ImageMagick-6.1.1/coders/caption.c File Reference

Functions

Function Documentation