compositor: check queryString success
During a bring-up of a new backend, it would be nice to get a real error
message, when the EGL and GL contexts have not been properly set up.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
diff --git a/src/compositor.c b/src/compositor.c
index e0cba67..ac5e91c 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -2380,6 +2380,11 @@
(void *) eglGetProcAddress("eglUnbindWaylandDisplayWL");
extensions = (const char *) glGetString(GL_EXTENSIONS);
+ if (!extensions) {
+ fprintf(stderr, "Retrieving GL extension string failed.\n");
+ return -1;
+ }
+
if (!strstr(extensions, "GL_EXT_texture_format_BGRA8888")) {
fprintf(stderr,
"GL_EXT_texture_format_BGRA8888 not available\n");
@@ -2396,6 +2401,11 @@
extensions =
(const char *) eglQueryString(ec->display, EGL_EXTENSIONS);
+ if (!extensions) {
+ fprintf(stderr, "Retrieving EGL extension string failed.\n");
+ return -1;
+ }
+
if (strstr(extensions, "EGL_WL_bind_wayland_display"))
ec->has_bind_display = 1;
if (ec->has_bind_display)