From: Xavier Bouchoux <xavi...@gmail.com>
D3DQUERYTYPE_TIMESTAMPFREQ is supposed to give the frequency
at which the clock of D3DQUERYTYPE_TIMESTAMP runs.
PIPE_QUERY_TIMESTAMP returns a value in ns, thus the corresponding
frequency is 1000000000.
PIPE_QUERY_TIMESTAMP_DISJOINT returns the frequency at which
PIPE_QUERY_TIMESTAMP value is updated. It isn't always
1000000000.
Reviewed-by: Axel Davy <axel.d...@ens.fr>
Signed-off-by: Xavier Bouchoux <xavi...@gmail.com>
---
src/gallium/state_trackers/nine/query9.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/src/gallium/state_trackers/nine/query9.c
b/src/gallium/state_trackers/nine/query9.c
index 466b4ba..df49340 100644
--- a/src/gallium/state_trackers/nine/query9.c
+++ b/src/gallium/state_trackers/nine/query9.c
@@ -254,7 +254,15 @@ NineQuery9_GetData( struct NineQuery9 *This,
nresult.b = presult.timestamp_disjoint.disjoint;
break;
case D3DQUERYTYPE_TIMESTAMPFREQ:
- nresult.u64 = presult.timestamp_disjoint.frequency;
+ /* Applications use it to convert the TIMESTAMP value to time.
+ AMD drivers on win seem to return the actual hardware clock
+ resolution and corresponding values in TIMESTAMP.
+ However, this behaviour is not easy to replicate here.
+ So instead we do what wine and opengl do, and use
+ nanoseconds TIMESTAMPs.
+ (Which is also the unit used by PIPE_QUERY_TIMESTAMP.)
+ */
+ nresult.u64 = 1000000000;
break;
case D3DQUERYTYPE_VERTEXSTATS:
nresult.vertexstats.NumRenderedTriangles =
--
2.1.0
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