sync code with last improvements from OpenBSD

dist/libepoxy/test/egl_common.c

@@ -0,0 +1,54 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <err.h>
+#include <epoxy/egl.h>
+#include <X11/Xlib.h>
+#include "egl_common.h"
+
+/**
+ * Do whatever it takes to get us an EGL display for the system.
+ *
+ * This needs to be ported to other window systems.
+ */
+EGLDisplay *
+get_egl_display_or_skip(void)
+{
+    Display *dpy = XOpenDisplay(NULL);
+    EGLint major, minor;
+    EGLDisplay *edpy;
+    bool ok;
+
+    if (!dpy)
+        errx(77, "couldn't open display\n");
+
+    edpy = eglGetDisplay(dpy);
+    if (!edpy)
+        errx(1, "Couldn't get EGL display for X11 Display.\n");
+
+    ok = eglInitialize(edpy, &major, &minor);
+    if (!ok)
+        errx(1, "eglInitialize() failed\n");
+
+    return edpy;
+}