tree 71756ba5ab83253d2fa611dcce3083de11eb948e
parent 763ccae7d734cc7e55772936dc3f101a2bf453d4
author Mathias Agopian <mathias@google.com> 1256711628 -0700
committer Mathias Agopian <mathias@google.com> 1256766584 -0700

fix [2071412] work around mdp 32-bits fade limitation

in the case where we fade a 32-bits surface (ie: GL_MODULATE w/ a,a,a,a + blending),
we first make a copy of the background into a RGB buffer, then we blend the 32-bits
surface as usual (without the alpha component), and finally blend the copy of
the background on top with 1-a. This uses a lot of bandwidth, but no CPU time.