Whether multisampling is turned on depends, in part, on whether
attachments are themselves multisample surfaces. However when there are
no attachments, we should rely on the default geometry for this.

Signed-off-by: Ilia Mirkin <imir...@alum.mit.edu>
---

With this, nvc0 works as expected (in a soon-to-be sent test update)

 src/mesa/main/state.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mesa/main/state.c b/src/mesa/main/state.c
index 4043c4f..57f1341 100644
--- a/src/mesa/main/state.c
+++ b/src/mesa/main/state.c
@@ -352,7 +352,7 @@ update_multisample(struct gl_context *ctx)
    ctx->Multisample._Enabled = GL_FALSE;
    if (ctx->Multisample.Enabled &&
        ctx->DrawBuffer &&
-       ctx->DrawBuffer->Visual.sampleBuffers)
+       _mesa_geometric_samples(ctx->DrawBuffer) > 0)
       ctx->Multisample._Enabled = GL_TRUE;
 }
 
-- 
2.4.10

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