Handle missing dri extension more gracefully.

We used to segfault, now we just fail at creating a display.

1 files changed, 10 insertions, 0 deletions

diff --git a/eagle.c b/eagle.c
index d4d403d..aa896e7 100644
--- a/eagle.c
+++ b/eagle.c
@@ -209,6 +209,16 @@ eglInitDisplay(EGLDisplay display,
 		}
 	}
 
+	if (display->texBuffer == NULL) {
+		fprintf(stderr, "dri driver has no texBuffer extension\n");
+		goto fail;
+	}
+
+	if (display->copyBuffer == NULL) {
+		fprintf(stderr, "dri driver has no copyBuffer extension\n");
+		goto fail;
+	}
+
 	for (i = 0; configs[i]; i++)
 		;
 	display->numConfigs = i;