c# - Merge several images into one -

have several images, every image placed in writablebitmap. each images represent 1 layer, every image contain transparency. need combine images one, combine algorithm: show first image(without changes), after draw second image, on first, additional transparency x%, after third image additional transparency y%, etc. work use framework 4.5, programming language c# , vs2012.
help.

you dynamically create image controls in code , add them children collection of grid or other panel.

alternatively may use grid itemspanel of itemscontrol, , bind itemssource property collection of objects have image , opacity propetrty:

<itemscontrol itemssource="{binding imageitems}">     <itemscontrol.itemspanel>         <itemspaneltemplate>             <grid/>         </itemspaneltemplate>     </itemscontrol.itemspanel>     <itemscontrol.itemtemplate>         <datatemplate>             <image source="{binding image}" opacity="{binding opacity}"/>         </datatemplate>     </itemscontrol.itemtemplate> </itemscontrol> 

in either case grid take care putting images on top of each other.