Make sure the vsync methods are really available
libglvnd seems to return a pointer to a function that does NOTHING for things the backing driver doesn't support. So we check if the extension is actually advertised before using it. Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
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@ -4485,6 +4485,11 @@ vsync_opengl_init(session_t *ps) {
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if (!ensure_glx_context(ps))
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return false;
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if (!glx_hasglxext(ps, "GLX_SGI_video_sync")) {
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printf_errf("(): Your driver doesn't support SGI_video_sync, giving up.");
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return false;
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}
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// Get video sync functions
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if (!ps->psglx->glXGetVideoSyncSGI)
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ps->psglx->glXGetVideoSyncSGI = (f_GetVideoSync)
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@ -4510,6 +4515,11 @@ vsync_opengl_oml_init(session_t *ps) {
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if (!ensure_glx_context(ps))
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return false;
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if (!glx_hasglxext(ps, "GLX_OML_sync_control")) {
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printf_errf("(): Your driver doesn't support OML_sync_control, giving up.");
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return false;
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}
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// Get video sync functions
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if (!ps->psglx->glXGetSyncValuesOML)
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ps->psglx->glXGetSyncValuesOML = (f_GetSyncValuesOML)
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@ -4535,6 +4545,11 @@ vsync_opengl_swc_init(session_t *ps) {
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if (!ensure_glx_context(ps))
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return false;
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if (!glx_hasglxext(ps, "GLX_SGI_swap_control")) {
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printf_errf("(): Your driver doesn't support SGI_swap_control, giving up.");
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return false;
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}
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if (!bkend_use_glx(ps)) {
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printf_errf("(): I'm afraid glXSwapIntervalSGI wouldn't help if you are "
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"not using GLX backend. You could try, nonetheless.");
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@ -4563,6 +4578,11 @@ vsync_opengl_mswc_init(session_t *ps) {
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if (!ensure_glx_context(ps))
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return false;
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if (!glx_hasglxext(ps, "GLX_MESA_swap_control")) {
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printf_errf("(): Your driver doesn't support MESA_swap_control, giving up.");
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return false;
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}
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if (!bkend_use_glx(ps)) {
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printf_errf("(): I'm afraid glXSwapIntervalMESA wouldn't help if you are "
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"not using GLX backend. You could try, nonetheless.");
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