[GRASSLIST:10403] Transparency added

[Huidae Cho]

I've added transparency feature to display drivers (XDRIVER and PNG) and d.rast
and d.vect now have transparency= (%) option.  You can find a screenshot
attached in which two rasters and one vector are overlaid.

# opaque drawing
d.rast dem
# 80% transparency, -o is needed not to clip previous drawings
d.rast landuse trans=80 -o
# 90% transparency with blue area fill
d.vect subbasins trans=90 fcolor=blue

Please find attached the png file.

I hope you enjoy this.
Huidae Cho
-------------- next part --------------
A non-text attachment was scrubbed...
Name: transparency.png
Type: image/png
Size: 185429 bytes
Desc: not available
Url : http://lists.osgeo.org/pipermail/grass-user/attachments/20060219/59ee308e/transparency.png