On 24/04/14 13:19, Frank Binns wrote:
Typically we want swaps to occur during vertical blank to avoid tearing. However, when the swap interval is 0 we want to go as quickly as possible even if this results in tearing.Indicate to the X server that it should attempt to do an asynchronise swap when the swap interval is 0. Signed-off-by: Frank Binns <frank.bi...@imgtec.com> --- src/glx/dri3_glx.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/src/glx/dri3_glx.c b/src/glx/dri3_glx.c index b7dac8e..e385723 100644 --- a/src/glx/dri3_glx.c +++ b/src/glx/dri3_glx.c @@ -1321,6 +1321,7 @@ dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor, xcb_connection_t *c = XGetXCBConnection(dpy); int buf_id = DRI3_BACK_ID(priv->cur_back); int64_t ret = 0; + uint32_t options = XCB_PRESENT_OPTION_NONE;unsigned flags = __DRI2_FLUSH_DRAWABLE;if (flush) @@ -1339,6 +1340,9 @@ dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor, if (target_msc == 0) target_msc = priv->msc + priv->swap_interval * (priv->send_sbc - priv->recv_sbc);+ if (priv->swap_interval == 0)+ options |= XCB_PRESENT_OPTION_ASYNC; + priv->buffers[buf_id]->busy = 1; priv->buffers[buf_id]->last_swap = priv->send_sbc; xcb_present_pixmap(c, @@ -1352,7 +1356,7 @@ dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor, None, /* target_crtc */ None, priv->buffers[buf_id]->sync_fence, - XCB_PRESENT_OPTION_NONE, + options, target_msc, divisor, remainder, 0, NULL);
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