--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/viewport.h	Mon Aug 09 17:04:08 2004 +0000
@@ -0,0 +1,117 @@
+#ifndef VIEWPORT_H
+#define VIEWPORT_H
+
+struct ViewPort {
+	int left,top;												// screen coordinates for the viewport
+	int width, height;									// screen width/height for the viewport
+
+	int virtual_left, virtual_top;			// virtual coordinates
+	int virtual_width, virtual_height;	// these are just width << zoom, height << zoom
+
+	byte zoom;	
+};
+
+/* viewport.c */
+Point MapXYZToViewport(ViewPort *vp, uint x, uint y, uint z);
+void AssignWindowViewport(Window *w, int x, int y, 
+	int width, int height, uint32 follow_flags, byte zoom);
+void SetViewportPosition(Window *w, int x, int y);
+ViewPort *IsPtInWindowViewport(Window *w, int x, int y);
+Point GetTileBelowCursor();
+Point GetTileZoomCenter(bool in);
+void UpdateViewportPosition(Window *w);
+
+void OffsetGroundSprite(int x, int y);
+
+void DrawGroundSprite(uint32 image);
+void DrawGroundSpriteAt(uint32 image, int x, int y, byte z);
+void AddSortableSpriteToDraw(uint32 image, int x, int y, int w, int h, byte dz, byte z);
+void *AddStringToDraw(int x, int y, StringID string, uint32 params_1, uint32 params_2);
+void AddChildSpriteScreen(uint32 image, int x, int y);
+
+
+void StartSpriteCombine();
+void EndSpriteCombine();
+
+void HandleViewportClicked(ViewPort *vp, int x, int y);
+void PlaceObject();
+void SetRedErrorSquare(TileIndex tile);
+void SetTileSelectSize(int w, int h);
+void SetTileSelectBigSize(int ox, int oy, int sx, int sy);
+
+void VpStartPlaceSizing(uint tile, int user);
+void VpStartPreSizing();
+void VpSetPresizeRange(uint from, uint to);
+void VpSetPlaceSizingLimit(int limit);
+
+Vehicle *CheckMouseOverVehicle();
+
+enum {
+	VPM_X_OR_Y = 0,
+	VPM_FIX_X = 1,
+	VPM_FIX_Y = 2,
+	VPM_RAILDIRS = 3,
+	VPM_X_AND_Y = 4,
+	VPM_X_AND_Y_LIMITED = 5,
+};
+
+void VpSelectTilesWithMethod(int x, int y, int method);
+
+enum {
+	HT_NONE = 0,
+	HT_RECT = 0x80,
+	HT_POINT = 0x40,
+	HT_LINE = 0x20,
+};
+
+typedef 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;
+	byte new_drawstyle;
+	byte next_drawstyle;
+
+	byte place_mode;
+	byte window_class;
+	bool make_square_red;
+	uint16 window_number;
+
+	int userdata;
+	TileIndex redsq;
+} TileHighlightData;
+
+
+enum AnimCursors {
+	ANIMCURSOR_DEMOLISH = -1,
+	ANIMCURSOR_LOWERLAND = -2,
+	ANIMCURSOR_RAISELAND = -3,
+	ANIMCURSOR_PICKSTATION = -4,
+	ANIMCURSOR_BUILDSIGNALS = -5,
+};
+
+// common button handler
+bool HandlePlacePushButton(Window *w, int widget, uint32 cursor, int mode, PlaceProc *placeproc);
+
+/* viewport.c */
+VARDEF ViewPort _viewports[18];
+VARDEF TileHighlightData _thd;
+VARDEF uint32 _active_viewports;
+
+VARDEF Point _tile_fract_coords;
+
+extern TileHighlightData * const _thd_ptr;
+
+
+#endif