From b2c41341130d758887e7c4dd72203075cd374677 Mon Sep 17 00:00:00 2001
From: Christoph Haag <christoph.haag@collabora.com>
Date: Sun, 17 Mar 2024 22:32:28 +0100
Subject: [PATCH] c/main: Check xdev view_count early and add error message

---
 src/xrt/compositor/main/comp_compositor.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/xrt/compositor/main/comp_compositor.c b/src/xrt/compositor/main/comp_compositor.c
index da610e19c..53d176cc7 100644
--- a/src/xrt/compositor/main/comp_compositor.c
+++ b/src/xrt/compositor/main/comp_compositor.c
@@ -964,6 +964,11 @@ comp_main_create_system_compositor(struct xrt_device *xdev,
 
 	COMP_DEBUG(c, "Doing init %p", (void *)c);
 
+	if (xdev->hmd->view_count == 0) {
+		U_LOG_E("Bug detected: HMD \"%s\" does not set xdev->hmd.view_count. Value must be > 0!", xdev->str);
+		assert(xdev->hmd->view_count > 0);
+	}
+
 	// Do this as early as possible.
 	comp_base_init(&c->base);