Excellent, had to also set pixelformat (on the offscreen surface) or it
wouldn't blit properly.

BTW, I was wondering, do you live on this mailinglist? ;-)

Sven Neumann <[EMAIL PROTECTED]> writes:

> ImageProvider::RenderTo doesn't do alpha blending. You want to render
> the first image directly onto the window surface. Then create an
> offscreen surface using the surface description provided by the image
> provider. Render your second image to that surface. Then blit the
> offscreen surface to the window surface using DSBLIT_BLEND_ALPHACHANNEL.
> You may then release the offscreen surface again.


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