diff options
| -rw-r--r-- | src/glx/dri3_glx.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/glx/dri3_glx.c b/src/glx/dri3_glx.c index b89cb463654..3f5e64c2a1e 100644 --- a/src/glx/dri3_glx.c +++ b/src/glx/dri3_glx.c @@ -1526,6 +1526,7 @@ dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor, xcb_connection_t *c = XGetXCBConnection(dpy); struct dri3_buffer *back; int64_t ret = 0; + uint32_t options = XCB_PRESENT_OPTION_NONE; unsigned flags = __DRI2_FLUSH_DRAWABLE; if (flush) @@ -1565,6 +1566,17 @@ 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); + /* From the GLX_EXT_swap_control spec: + * + * "If <interval> is set to a value of 0, buffer swaps are not + * synchronized to a video frame." + * + * Implementation note: It is possible to enable triple buffering behaviour + * by not using XCB_PRESENT_OPTION_ASYNC, but this should not be the default. + */ + if (priv->swap_interval == 0) + options |= XCB_PRESENT_OPTION_ASYNC; + back->busy = 1; back->last_swap = priv->send_sbc; xcb_present_pixmap(c, @@ -1578,7 +1590,7 @@ dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor, None, /* target_crtc */ None, back->sync_fence, - XCB_PRESENT_OPTION_NONE, + options, target_msc, divisor, remainder, 0, NULL); |