Hi EW Team，
when I use exter bitmap, I found the alpha blending is confusing.
The result is
Actually, the white area should be apparent, but it obviously not. When I change the extern bitmap value to be 0x50505050， it
behaves as correct as the right gray part.
So I 'm wondering that did it use premultied alpha? Cause I have seen you use glBendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA)
Another question is when I tried it on soft 9.30 package, it is another effect as below(ignore the rotation):
What‘s the reason?