[Mesa3d-users] Bug in glReadPixels

[Paul B. <pau...@un...>]

I am using Mesa 4.0.1 on MS Windows 98. I have set up a window with an 8 =
bit alpha buffer (confirmed by checking glGetIntegerv(GL_ALPHA_BITS) ). =
Whenever I use glReadPixels, the alpha component is returned as 255, =
despite having set it differently. This problem also ocurrs with trying =
to blend using GL_DST_ALPHA, it is as if the alpha buffer were full of =
1.0f.
Does anyone know a fix for this?

Thanks