c# - Fill ViewBox completely with part of image area determined by Image.Clip -


i have large image want use within windows phone 8.1 app. purpose of application want show part of image , want fill complete viewbox specific part.

i can specific part of image using image.clip. until have been unable viewbox filled part determined image.clip. use following xaml.

     <pivot>         <pivotitem margin="10">             <viewbox stretch="uniform" stretchdirection="both">                 <image source="http://image.png"                        stretch="none">                     <image.clip>                          <rectanglegeometry rect="500,100,600,700"/>                     </image.clip>                 </image>             </viewbox>         </pivotitem>     </pivot>

i've tried various combinations of stretch settings on both image , viewbox. i'also experimented scaletransforms until no luck.

so question is want possible within xaml , if combination of xaml code should use?

you may fill fixed size rectangle translated imagebrush this:

<viewbox stretch="uniform" stretchdirection="both">     <rectangle width="600" height="700">         <rectangle.fill>             <imagebrush imagesource="http://image.png"                         stretch="none" alignmentx="left" alignmenty="top">                 <imagebrush.transform>                     <translatetransform x="-500" y="-100"/>                 </imagebrush.transform>             </imagebrush>         </rectangle.fill>     </rectangle> </viewbox>

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