[gtkada] Preserving background pixmap when animating

[Kay M]

I have a background pixmapped GtkDrawingArea. I am Draw_Pixmp()ing
pixmaps on to it to achieve animation. The function also uses transparency, 
so the background pixmap show through.

Problem is becaese of transparancy a frame overlapping effect is viewed ( 
the old frames stay). What I need is to clear the drawing
area everytime a new frame is drawn,... If i do this i get flicker.
I need to  some how write the background pixmap onto the transparent
part of the gdk_bitmap mask OR! somehow draw onto the drawing area
freshly (like th first frame) everytime (all frames)

Does anyone know how to do this. or to preserve/redraw background pixmaps in 
animation.
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