Re: Can glReadPixels get Alpha in color buffer?


"Alvin" <CHUJINGJUN@xxxxxxxxx> schrieb im Newsbeitrag
news:1141209256.738657.245910@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi,all.
I used glDrawPixels to draw some pixels in GL_AUX0 ,then I want to
read
these Pixels by glReadPixels. I use GL_RGBA as the format for draw
and
read, but I found it seems all the pixels read has the same alpha
value
of ONE. So I just wonder how to get the right alpha?

In a 16 bit display you propably won't have any.


.

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