new backend: glx: use glFinish/glXWaitGL if not on NVIDIA

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>

src/backend/gl/gl_common.c

@@ -834,6 +834,15 @@ bool gl_init(struct gl_data *gd, session_t *ps) {
 		log_add_target_tls(gd->logger);
 	}
 
+	const char *vendor = (const char *)glGetString(GL_VENDOR);
+	log_debug("GL_VENDOR = %s", vendor);
+	if (strcmp(vendor, "NVIDIA Corporation") == 0) {
+		log_info("GL vendor is NVIDIA, don't use glFinish");
+		gd->is_nvidia = true;
+	} else {
+		gd->is_nvidia = false;
+	}
+
 	return true;
 }