commit dfe55f7cf6e23d7bf2ff0076a7347cbc99d4a6f9
author Ian Elliott <ian@LunarG.com> Fri Apr 03 15:24:55 2015 -0600
committer Ian Elliott <ian@LunarG.com> Fri Apr 03 15:24:55 2015 -0600
tree 2bff8f022b6cdf3fc91f636fddc04d5acbdda75f
parent 7518ecd7cf4d776470f5cae6f823d9ab9dad5afb

Have demos give a useful error if no compatible ICD found.

demos/cube.c

diff --git a/demos/cube.c b/demos/cube.c
index dca5432..920a542 100644
--- a/demos/cube.c
+++ b/demos/cube.c
@@ -1700,7 +1700,14 @@
     uint32_t i;
 
     err = xglCreateInstance(&app, NULL, &demo->inst);
-    assert(!err);
+    if (err == XGL_ERROR_INCOMPATIBLE_DRIVER) {
+        printf("Cannot find a compatible Vulkan installable client driver "
+               "(ICD).\nExiting ...\n");
+        fflush(stdout);
+        exit(1);
+    } else {
+        assert(!err);
+    }
     err = xglEnumerateGpus(demo->inst, 1, &gpu_count, &demo->gpu);
     assert(!err && gpu_count == 1);
 
@@ -1727,6 +1734,12 @@
     int scr;
 
     demo->connection = xcb_connect(NULL, &scr);
+    if (demo->connection == NULL) {
+        printf("Cannot find a compatible Vulkan installable client driver "
+               "(ICD).\nExiting ...\n");
+        fflush(stdout);
+        exit(1);
+    }
 
     setup = xcb_get_setup(demo->connection);
     iter = xcb_setup_roots_iterator(setup);