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diff --git a/engines/titanic/support/screen_manager.h b/engines/titanic/support/screen_manager.h
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+++ b/engines/titanic/support/screen_manager.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef TITANIC_SCREEN_MANAGER_H
+#define TITANIC_SCREEN_MANAGER_H
+
+#include "common/scummsys.h"
+#include "common/array.h"
+#include "titanic/support/direct_draw.h"
+#include "titanic/support/font.h"
+#include "titanic/input_handler.h"
+#include "titanic/support/mouse_cursor.h"
+#include "titanic/support/text_cursor.h"
+#include "titanic/support/video_surface.h"
+#include "titanic/core/resource_key.h"
+
+namespace Titanic {
+
+/**
+ * The original used page flipping with one primary and one back buffer.
+ * Since we don't need that in ScummVM, the back buffer number below is
+ * remapped to the primary surface
+ */
+enum SurfaceNum {
+	SURFACE_PRIMARY = -1,		// Surface 0
+	SURFACE_BACKBUFFER = -1		// Surface -1
+};
+
+class TitanicEngine;
+
+class CScreenManager {
+	struct VideoSurfaceEntry {
+		CVideoSurface *_surface;
+		Rect _bounds;
+	};
+protected:
+	TitanicEngine *_vm;
+public:
+	static CScreenManager *_screenManagerPtr;
+	static CScreenManager *_currentScreenManagerPtr;
+
+	/**
+	 * Set the current screen manager
+	 */
+	static CScreenManager *setCurrent();
+public:
+	Common::Array<VideoSurfaceEntry> _backSurfaces;
+	CVideoSurface *_frontRenderSurface;
+	CMouseCursor *_mouseCursor;
+	CTextCursor *_textCursor;
+	CInputHandler *_inputHandler;
+	int _fontNumber;
+public:
+	CScreenManager(TitanicEngine *vm);
+	virtual ~CScreenManager();
+
+	void fn1() {}
+	void fn2() {}
+
+	virtual void setWindowHandle(int v);
+	virtual bool resetWindowHandle(int v);
+	
+	/**
+	 * Sets the video mode
+	 */
+	virtual void setMode(int width, int height, int bpp, uint numBackSurfaces, bool flag2) = 0;
+
+	/**
+	 * Handles drawing the cursors
+	 */
+	virtual void drawCursors() = 0;
+	
+	/**
+	 * Locks a specified surface number for access and returns a pointer to it
+	 */
+	virtual CVideoSurface *lockSurface(SurfaceNum surfaceNum) = 0;
+	
+	/**
+	 * Unlocks a previously locked surface
+	 */
+	virtual void unlockSurface(CVideoSurface *surface) = 0;
+	
+	/**
+	 * Gets a specified surface number
+	 */
+	virtual CVideoSurface *getSurface(SurfaceNum surfaceNum) const = 0;
+
+	/**
+	 * Return the front render surface
+	 */
+	virtual CVideoSurface *getFrontRenderSurface() const = 0;
+	
+	/**
+	 * Fill an area with a specific color
+	 */
+	virtual void fillRect(SurfaceNum surfaceNum, Rect *rect, byte r, byte g, byte b) = 0;
+
+	/**
+	 * Blits a surface onto one of the screen surfaces
+	 */
+	virtual void blitFrom(SurfaceNum surfaceNum, CVideoSurface *src, const Point *destPos = nullptr,
+		const Rect *srcRect = nullptr) = 0;
+
+	/**
+	 * Blits a surface onto one of the screen surfaces
+	 */
+	virtual void blitFrom(SurfaceNum surfaceNum, const Rect *rect, CVideoSurface *src, int v = 0) = 0;
+
+	/**
+	 * Write a string
+	 * @param surfaceNum	Destination surface
+	 * @param destRect		Bounds within dest surface
+	 * @param yOffset		Y offset for drawing, to allow for parts of
+	 *						the text to be scrolled off-screen
+	 * @param str			Line or lines to write
+	 * @param textCursor	Optional text cursor pointer
+	 */
+	virtual int writeString(int surfaceNum, const Rect &destRect,
+		int yOffset, const CString &str, CTextCursor *textCursor) = 0;
+
+	/**
+	 * Write a string
+	 * @param surfaceNum	Destination surface
+	 * @param srcRect		Drawing area
+	 * @param destRect		Bounds of dest surface
+	 * @param str			Line or lines to write
+	 * @param textCursor	Optional text cursor pointer
+	 */
+	virtual int writeString(int surfaceNum, const Rect &srcRect,
+		const Rect &destRect, const CString &str, CTextCursor *textCursor) = 0;
+
+	/**
+	 * Set the font color
+	 */
+	virtual void setFontColor(byte r, byte g, byte b) = 0;
+
+	/**
+	 * Get the text area a string will fit into
+	 * @param str		String
+	 * @param maxWidth	Maximum width in pixels
+	 * @param sizeOut	Optional pointer to output size
+	 * @returns			Required height
+	 */
+	virtual int getTextBounds(const CString &str, int maxWidth, Point *sizeOut = nullptr) const = 0;
+
+	/**
+	 * Get the current font height
+	 */
+	virtual int getFontHeight() const = 0;
+
+	/**
+	 * Returns the width of a given string in pixels
+	 */
+	virtual int stringWidth(const CString &str) = 0;
+
+	/**
+	 * Draws a frame enclosing the specified area
+	 */
+	virtual void frameRect(SurfaceNum surfaceNum, const Rect &rect, byte r, byte g, byte b) = 0;
+
+	/**
+	 * Clear a portion of a specified surface
+	 */
+	virtual void clearSurface(SurfaceNum surfaceNum, Rect *_bounds) = 0;
+
+	/**
+	 * Resize the passed surface
+	 */
+	virtual void resizeSurface(CVideoSurface *surface, int width, int height) = 0;
+
+	/**
+	 * Creates a surface of a given size
+	 */
+	virtual CVideoSurface *createSurface(int w, int h) = 0;
+	
+	/**
+	 * Creates a surface from a specified resource
+	 */
+	virtual CVideoSurface *createSurface(const CResourceKey &key) = 0;
+
+	/**
+	* Get the top-left corner of the screen in global screen co-ordinates
+	* For ScummVM, this is always (0, 0), even in Windowed mode
+	*/
+	virtual Point getScreenTopLeft() { return Point(0, 0); }
+
+	/**
+	 * Waits for a vertical screen sync
+	 * For ScummVM, this can be safely ignored
+	 */
+	virtual void waitForVSync() {}
+
+	/**
+	 * Show the mouse cursor
+	 */
+	virtual void showCursor() = 0;
+	
+	/**
+	 * Hide the mouse cursor
+	 */
+	virtual void hideCursor() = 0;
+
+	/**
+	 * Set drawing bounds for a specified surface
+	 */
+	void setSurfaceBounds(SurfaceNum surfaceNum, const Rect &r);
+
+	/**
+	 * Set the current font number
+	 */
+	int setFontNumber(int fontNumber);
+};
+
+class OSScreenManager: CScreenManager {
+private:
+	DirectDrawManager _directDrawManager;
+
+	/**
+	 * Frees any surface buffers
+	 */
+	void destroyFrontAndBackBuffers();
+
+	/**
+	 * Load game cursors
+	 */
+	void loadCursors();
+
+	/**
+	 * Gets an underlying surface
+	 */
+	DirectDrawSurface *getDDSurface(SurfaceNum surfaceNum);
+public:
+	int _field48;
+	int _field4C;
+	int _field50;
+	int _field54;
+	STFont _fonts[4];
+public:
+	OSScreenManager(TitanicEngine *vm);
+	virtual ~OSScreenManager();
+
+	/**
+	 * Sets the video mode
+	 */
+	virtual void setMode(int width, int height, int bpp, uint numBackSurfaces, bool flag2);
+
+	/**
+	 * Handles drawing the cursors
+	 */
+	virtual void drawCursors();
+
+	/**
+	 * Locks a specified surface number for access and returns a pointer to it
+	 */
+	virtual CVideoSurface *lockSurface(SurfaceNum surfaceNum);
+	
+	/**
+	 * Unlocks a previously locked surface
+	 */
+	virtual void unlockSurface(CVideoSurface *surface);
+	
+	/**
+	 * Gets a specified surface number
+	 */
+	virtual CVideoSurface *getSurface(SurfaceNum surfaceNum) const;
+
+	/**
+	 * Return the front render surface
+	 */
+	virtual CVideoSurface *getFrontRenderSurface() const {
+		return _frontRenderSurface;
+	}
+
+
+	/**
+	 * Fill an area with a specific color
+	 */
+	virtual void fillRect(SurfaceNum surfaceNum, Rect *rect, byte r, byte g, byte b);
+
+	/**
+	 * Blits a surface onto one of the screen surfaces
+	 */
+	virtual void blitFrom(SurfaceNum surfaceNum, CVideoSurface *src, const Point *destPos,
+		const Rect *srcRect = nullptr);
+
+	/**
+	 * Blits a surface onto one of the screen surfaces
+	 */
+	virtual void blitFrom(SurfaceNum surfaceNum, const Rect *rect, CVideoSurface *src, int v = 0);
+
+	/**
+	 * Write a string
+	 * @param surfaceNum	Destination surface
+	 * @param destRect		Bounds within dest surface
+	 * @param yOffset		Y offset for drawing, to allow for parts of
+	 *						the text to be scrolled off-screen
+	 * @param str			Line or lines to write
+	 * @param textCursor	Optional text cursor pointer
+	 */
+	virtual int writeString(int surfaceNum, const Rect &destRect,
+		int yOffset, const CString &str, CTextCursor *textCursor);
+
+	/**
+	 * Write a string
+	 * @param surfaceNum	Destination surface
+	 * @param srcRect		Drawing area
+	 * @param destRect		Bounds of dest surface
+	 * @param str			Line or lines to write
+	 * @param textCursor	Optional text cursor pointer
+	 */
+	virtual int writeString(int surfaceNum, const Rect &srcRect,
+		const Rect &destRect, const CString &str, CTextCursor *textCursor);
+
+	/**
+	 * Set the font color
+	 */
+	virtual void setFontColor(byte r, byte g, byte b);
+
+	/**
+	 * Get the text area a string will fit into
+	 * @param str		String
+	 * @param maxWidth	Maximum width in pixels
+	 * @param sizeOut	Optional pointer to output size
+	 * @returns			Required height
+	 */
+	virtual int getTextBounds(const CString &str, int maxWidth, Point *sizeOut = nullptr) const;
+
+	/**
+	 * Get the current font height
+	 */
+	virtual int getFontHeight() const;
+
+	/**
+	 * Returns the width of a given string in pixels
+	 */
+	virtual int stringWidth(const CString &str);
+
+	/**
+	 * Draws a frame enclosing the specified area
+	 */
+	virtual void frameRect(SurfaceNum surfaceNum, const Rect &rect, byte r, byte g, byte b);
+
+	/**
+	 * Clear a portion of the screen surface
+	 */
+	virtual void clearSurface(SurfaceNum surfaceNum, Rect *bounds);
+
+	/**
+	 * Resize the passed surface
+	 */
+	virtual void resizeSurface(CVideoSurface *surface, int width, int height);
+
+	/**
+	 * Creates a surface of a given size
+	 */
+	virtual CVideoSurface *createSurface(int w, int h);
+	
+	/**
+	 * Creates a surface from a specified resource
+	 */
+	virtual CVideoSurface *createSurface(const CResourceKey &key);
+
+	/**
+	 * Show the mouse cursor
+	 */
+	virtual void showCursor();
+	
+	/**
+	 * Hide the mouse cursor
+	 */
+	virtual void hideCursor();
+};
+
+} // End of namespace Titanic
+
+#endif /* TITANIC_SCREEN_MANAGER_H */