[Bug 45468] Phase Shift: tails on sustain notes not visible unless GLSL is disabled

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=45468

--- Comment #5 from Andy Clayton <q3aiml+wine at gmail.com> ---
Henri: thanks so much for reading and helping.

You are absolutely right about the discard being valid. I messed up. Even
without the discard nothing is rendered since ret.w always equals 0 and
blending is enabled with glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA).

It then makes sense that removing the alpha-test shader code does not help.
Setting MaxVersionGL while leaving GLSL enabled does remove the alpha-test code
but also does not help. You are correct that the value of WINED3D_RS_ALPHAREF
is 3.

It does help to change the ret.w assign from `ret.w = tex0.w *
ffp_varying_diffuse.w;` to `ret.w = tex0.w;`.

I am just picking gl and d3d up again so I have to do some more reading and
experiments to have a guess at what is going on with ffp_varying_diffuse's
alpha. Or if you have any more insights to share that would also be great. I
have been meaning to attach logs but need to cut them down to a reasonable size
without losing anything important.

Thanks again for looking and sorry for my confusion.

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