diff options
| -rw-r--r-- | src/glx/dri3_glx.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/src/glx/dri3_glx.c b/src/glx/dri3_glx.c index 9b30c96742a..c542df39e0f 100644 --- a/src/glx/dri3_glx.c +++ b/src/glx/dri3_glx.c @@ -1517,11 +1517,24 @@ dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor, dri3_fence_reset(c, back); /* Compute when we want the frame shown by taking the last known successful - * MSC and adding in a swap interval for each outstanding swap request + * MSC and adding in a swap interval for each outstanding swap request. + * target_msc=divisor=remainder=0 means "Use glXSwapBuffers() semantic" */ ++priv->send_sbc; - if (target_msc == 0) + if (target_msc == 0 && divisor == 0 && remainder == 0) target_msc = priv->msc + priv->swap_interval * (priv->send_sbc - priv->recv_sbc); + else if (divisor == 0 && remainder > 0) { + /* From the GLX_OML_sync_control spec: + * + * "If <divisor> = 0, the swap will occur when MSC becomes + * greater than or equal to <target_msc>." + * + * Note that there's no mention of the remainder. The Present extension + * throws BadValue for remainder != 0 with divisor == 0, so just drop + * the passed in value. + */ + remainder = 0; + } /* From the GLX_EXT_swap_control spec: * |