mesa: use DriverFlags.NewAlphaTest to communicate alphatest changes to st/mesa

Now AlphaFunc avoids the blend state update in st/mesa and avoids
_mesa_update_state_locked.

The GL_ALPHA_TEST enable won't trigger blend state updates in st/mesa
after st/mesa stops relying on _NEW_COLOR.

Reviewed-by: Nicolai Hähnle <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: Timothy Arceri <[email protected]>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index dff40c67604..cdcc4ddaf48 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -237,8 +237,7 @@ st_invalidate_state(struct gl_context * ctx)
       st->dirty |= ST_NEW_CLIP_STATE;
 
    if (new_state & _NEW_COLOR)
-      st->dirty |= ST_NEW_BLEND |
-                   ST_NEW_DSA;
+      st->dirty |= ST_NEW_BLEND;
 
    if (new_state & _NEW_PIXEL)
       st->dirty |= ST_NEW_PIXEL_TRANSFER;
@@ -519,6 +518,7 @@ static void st_init_driver_flags(struct st_context *st)
    f->NewFramebufferSRGB = ST_NEW_FB_STATE;
    f->NewScissorRect = ST_NEW_SCISSOR;
    f->NewScissorTest = ST_NEW_SCISSOR | ST_NEW_RASTERIZER;
+   f->NewAlphaTest = ST_NEW_DSA;
    f->NewDepth = ST_NEW_DSA;
    f->NewStencil = ST_NEW_DSA;
 }