Note that Mir's current blending function, and the one most graphics code will ever use, does not read-back the destination alpha at all: glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
Thus the target buffer will never need alpha... unless we add fancy effects to the contrary later.
Note that Mir's current blending function, and the one most graphics code will ever use, does not read-back the destination alpha at all:
glBlendFunc( GL_SRC_ ALPHA, GL_ONE_ MINUS_SRC_ ALPHA);
Thus the target buffer will never need alpha... unless we add fancy effects to the contrary later.