Sourath Roy wrote:
I got my wording wrong, yes it won't have a "blend". Destination
component won't come here as its just DSPD_SRC. Sorry about that..
But won't the drawing get affected by the alpha component of the color?
I mean if the alpha component of a pixel be 0, wouldn't that pixel be
invisible?
If you fill or draw with alpha = 0, it still depends on how the
destination surface is used or shown.
Writing to a surface of a window which is blended with the windows below
(DWCAPS_ALPHACHANNEL) will give you different visibility of the window's
pixels depending on their alpha value.
But if the alpha value is not taken care of, you won't see a difference,
e.g. rendering to a layer directly without using DLOP_ALPHACHANNEL.
That's most probably the case with the FBDev Primary Layer unless you
have special driver that overrides or extends the fbdev implementation.
--
Best regards,
Denis Oliver Kropp
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