[client] overlay: use utility function to get ImGui rectangle

client/src/overlay_utils.c

@@ -0,0 +1,37 @@
+/**
+ * Looking Glass
+ * Copyright (C) 2017-2021 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "overlay_utils.h"
+
+#include "cimgui.h"
+
+void overlayGetImGuiRect(struct Rect * rect)
+{
+  ImVec2 size;
+  ImVec2 pos;
+
+  igGetWindowPos(&pos);
+  igGetWindowSize(&size);
+
+  rect->x = pos.x;
+  rect->y = pos.y;
+  rect->w = size.x;
+  rect->h = size.y;
+}