+void *ewmh_icon_alloc(unsigned long **sizes)
+{
+ unsigned long *buf;
+
+ buf = calloc(sizeof *buf, EWMH_ICON_NELEM);
+ if (buf) {
+ sizes[ICON_16x16] = buf;
+ *sizes[ICON_16x16]++ = 16;
+ *sizes[ICON_16x16]++ = 16;
+
+ sizes[ICON_24x24] = sizes[ICON_16x16] + 16*16;
+ *sizes[ICON_24x24]++ = 24;
+ *sizes[ICON_24x24]++ = 24;
+
+ sizes[ICON_32x32] = sizes[ICON_24x24] + 24*24;
+ *sizes[ICON_32x32]++ = 32;
+ *sizes[ICON_32x32]++ = 32;
+
+ sizes[ICON_48x48] = sizes[ICON_32x32] + 32*32;
+ *sizes[ICON_48x48]++ = 48;
+ *sizes[ICON_48x48]++ = 48;
+ }
+
+ return buf;
+}
+
+#if !X_DISPLAY_MISSING
+
+/*
+ * EWMH-supporting window managers that handle _NET_WM_ICON add this atom to
+ * the _NET_SUPPORTED list on the root window. Look for that and return 1
+ * if it is found, or 0 otherwise.
+ */