new file mode 100644
--- /dev/null
+++ b/src/tilehighlight_type.h
@@ -0,0 +1,77 @@
+/* $Id$ */
+
+/** @file tilehighlight_type.h Types related to highlighting tiles. */
+
+#ifndef TILEHIGHLIGHT_TYPE_H
+#define TILEHIGHLIGHT_TYPE_H
+
+#include "core/geometry_type.hpp"
+#include "zoom_type.h"
+#include "window_type.h"
+#include "tile_type.h"
+
+/** Viewport highlight mode (for highlighting tiles below cursor) */
+enum ViewportHighlightMode {
+	VHM_NONE    = 0, ///< default
+	VHM_RECT    = 1, ///< rectangle (stations, depots, ...)
+	VHM_POINT   = 2, ///< point (lower land, raise land, level land, ...)
+	VHM_SPECIAL = 3, ///< special mode used for highlighting while dragging (and for tunnels/docks)
+	VHM_DRAG    = 4, ///< dragging items in the depot windows
+	VHM_RAIL    = 5, ///< rail pieces
+};
+
+/** Highlighting draw styles */
+enum HighLightStyle {
+	HT_NONE   = 0x00,
+	HT_RECT   = 0x80,
+	HT_POINT  = 0x40,
+	HT_LINE   = 0x20,    ///< used for autorail highlighting (longer streches)
+	                     ///< (uses lower bits to indicate direction)
+	HT_RAIL   = 0x10,    ///< autorail (one piece)
+	                     ///< (uses lower bits to indicate direction)
+	HT_DRAG_MASK = 0xF0, ///< masks the drag-type
+
+	/* lower bits (used with HT_LINE and HT_RAIL):
+	 * (see ASCII art in autorail.h for a visual interpretation) */
+	HT_DIR_X  = 0,    ///< X direction
+	HT_DIR_Y  = 1,    ///< Y direction
+	HT_DIR_HU = 2,    ///< horizontal upper
+	HT_DIR_HL = 3,    ///< horizontal lower
+	HT_DIR_VL = 4,    ///< vertical left
+	HT_DIR_VR = 5,    ///< vertical right
+	HT_DIR_MASK = 0x7 ///< masks the drag-direction
+};
+DECLARE_ENUM_AS_BIT_SET(HighLightStyle);
+
+
+struct TileHighlightData {
+	Point size;
+	Point outersize;
+	Point pos;
+	Point offs;
+
+	Point new_pos;
+	Point new_size;
+	Point new_outersize;
+
+	Point selend, selstart;
+
+	byte dirty;
+	byte sizelimit;
+
+	byte drawstyle;      // lower bits 0-3 are reserved for detailed highlight information information
+	byte new_drawstyle;  // only used in UpdateTileSelection() to as a buffer to compare if there was a change between old and new
+	byte next_drawstyle; // queued, but not yet drawn style
+
+	ViewportHighlightMode place_mode;
+	bool make_square_red;
+	WindowClass window_class;
+	WindowNumber window_number;
+
+	ViewportPlaceMethod select_method;
+	byte select_proc;
+
+	TileIndex redsq;
+};
+
+#endif /* TILEHIGHLIGHT_TYPE_H */