diff options
| author | Jason Ekstrand <[email protected]> | 2016-05-18 13:05:48 -0700 |
|---|---|---|
| committer | Jason Ekstrand <[email protected]> | 2016-05-23 19:12:34 -0700 |
| commit | d5b4ab2c5f700087ac09238e3cf8252aa3d31d54 (patch) | |
| tree | 2a3d032cec8044e7dc88a7e585b5092ec735e796 /src | |
| parent | ad42ab473cb327e9f0498bda9d92cccc4279a0e8 (diff) | |
i965/draw: Properly handle rounding when dividing by InstanceDivisor
The old code always divided rounded down and then subtracted 1. What we
wanted was to divide rounded up and then subtract 1 which is equivalent to
subtracting 1 and then dividing rounded down.
Cc: "11.1 11.2" <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_draw_upload.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_draw_upload.c b/src/mesa/drivers/dri/i965/brw_draw_upload.c index 6d9e65e9cfa..b651fd202cd 100644 --- a/src/mesa/drivers/dri/i965/brw_draw_upload.c +++ b/src/mesa/drivers/dri/i965/brw_draw_upload.c @@ -474,8 +474,8 @@ brw_prepare_vertices(struct brw_context *brw) if (glarray->InstanceDivisor) { if (brw->num_instances) { start = offset + glarray->StrideB * brw->baseinstance; - range = (glarray->StrideB * ((brw->num_instances / - glarray->InstanceDivisor) - 1) + + range = (glarray->StrideB * ((brw->num_instances - 1) / + glarray->InstanceDivisor) + glarray->_ElementSize); } } else { |