From 3979e28e2db350a42156ed127864a5d422b091ee Mon Sep 17 00:00:00 2001
From: Ian Elliott <ian@LunarG.com>
Date: Fri, 3 Apr 2015 15:24:55 -0600
Subject: Have demos give a useful error if no compatible ICD found.

---
 demos/cube.c    | 15 ++++++++++++++-
 demos/tri.c     | 15 ++++++++++++++-
 demos/xglinfo.c |  8 +++++++-
 3 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/demos/cube.c b/demos/cube.c
index dca54328..920a542f 100644
--- a/demos/cube.c
+++ b/demos/cube.c
@@ -1700,7 +1700,14 @@ static void demo_init_xgl(struct demo *demo)
     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 @@ static void demo_init_connection(struct demo *demo)
     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);
diff --git a/demos/tri.c b/demos/tri.c
index 39b1513c..efbd1a99 100644
--- a/demos/tri.c
+++ b/demos/tri.c
@@ -1322,7 +1322,14 @@ static void demo_init_xgl(struct demo *demo)
     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);
 
@@ -1352,6 +1359,12 @@ static void demo_init_connection(struct demo *demo)
     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);
diff --git a/demos/xglinfo.c b/demos/xglinfo.c
index 4544c23d..e0887a20 100644
--- a/demos/xglinfo.c
+++ b/demos/xglinfo.c
@@ -659,8 +659,14 @@ int main(int argc, char **argv)
     XGL_RESULT err;
 
     err = xglCreateInstance(&app_info, NULL, &inst);
-    if (err)
+    if (err == XGL_ERROR_INCOMPATIBLE_DRIVER) {
+        printf("Cannot find a compatible Vulkan installable client driver "
+               "(ICD).\nExiting ...\n");
+        fflush(stdout);
+        exit(1);
+    } else if (err) {
         ERR_EXIT(err);
+    }
     err = xglEnumerateGpus(inst, MAX_GPUS, &gpu_count, objs);
     if (err)
         ERR_EXIT(err);
-- 
cgit v1.2.3