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glx/dri: Add a driconf option to disable GLX_SGI_video_sync

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Drivers on virtual hardware don't want to expose this extension to
GLX compositors, similarly to GLX_OML_sync_control, since that significantly
increases latency.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
This commit is contained in:
Thomas Hellstrom
2018-02-26 14:27:40 +01:00
parent 0c90264da4
commit f4070956d4
3 changed files with 16 additions and 4 deletions
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6
src/glx/dri3_glx.c
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@@ -721,7 +721,6 @@ dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
extensions = psc->core->getExtensions(psc->driScreen);
__glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
__glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
__glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
__glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
@@ -956,6 +955,11 @@ dri3_create_screen(int screen, struct glx_display * priv)
&disable) || !disable)
__glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
if (psc->config->configQueryb(psc->driScreen,
"glx_disable_sgi_video_sync",
&disable) || !disable)
__glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
psp->copySubBuffer = dri3_copy_sub_buffer;
__glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");