On Mon, Sep 19, 2005 at 12:57:33AM -0400, Chris @ Napatech wrote:
> I have a question regarding surface drawing and alpha transparency. The 
> default behaviour when executing the function SetColor with a 
> translucent alpha value followed by a DrawLine for example, will yield a 
> hole in the Window to which the surface belongs. Is there a way in 
> changing the rendering behaviour of the DrawLine so that it blends the 
> line to whatever else has previously been drawn to the window, rather 
> than making a translucent hole through the window? Thanks.

SetDrawingFlags(DSDRAW_BLEND)

You can further modify the blending behavior with SetSrcBlendFunction() 
and SetDstBlendFunction(), or with SetPorterDuff().

-- 
Ville Syrjälä
[EMAIL PROTECTED]
http://www.sci.fi/~syrjala/

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