Add minetest.get_player_window_information() (#12367)

src/clientdynamicinfo.h

@@ -0,0 +1,51 @@
+/*
+Minetest
+Copyright (C) 2022-3 rubenwardy <rw@rubenwardy.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#pragma once
+
+#include "irrTypes.h"
+
+
+struct ClientDynamicInfo
+{
+	v2u32 render_target_size;
+	f32 real_gui_scaling;
+	f32 real_hud_scaling;
+	v2f32 max_fs_size;
+
+	bool equal(const ClientDynamicInfo &other) const {
+		return render_target_size == other.render_target_size &&
+				abs(real_gui_scaling - other.real_gui_scaling) < 0.001f &&
+				abs(real_hud_scaling - other.real_hud_scaling) < 0.001f;
+	}
+
+	static v2f32 calculateMaxFSSize(v2u32 render_target_size) {
+		f32 factor =
+#ifdef HAVE_TOUCHSCREENGUI
+				10;
+#else
+				15;
+#endif
+		f32 ratio = (f32)render_target_size.X / (f32)render_target_size.Y;
+		if (ratio < 1)
+			return { factor, factor / ratio };
+		else
+			return { factor * ratio, factor };
+	}
+};