[fpc-pascal] fpcanvas and alpha-blending

[Felipe Monteiro de Carvalho]

Hello,

I'd like fpcanvas to support alpha-blending while drawing for example
polygons, and I wonder what the best way would be.

Maybe a new property AlphaBlend: Boolean to both TFPCustomBrush and
TFPCustomPen?

Pen has Mode, which could have a new mode for alphablend, although I'm
not sure if this is desirable... and brush has no mode.

thanks,
-- 
Felipe Monteiro de Carvalho