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diff --git a/src/engine/client/pnglite/pnglite.h b/src/engine/client/pnglite/pnglite.h
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+/*  pnglite.h - Interface for pnglite library
+	Copyright (c) 2007 Daniel Karling
+
+	This software is provided 'as-is', without any express or implied
+	warranty. In no event will the authors be held liable for any damages
+	arising from the use of this software.
+
+	Permission is granted to anyone to use this software for any purpose,
+	including commercial applications, and to alter it and redistribute it
+	freely, subject to the following restrictions:
+
+	1. The origin of this software must not be misrepresented; you must not
+	   claim that you wrote the original software. If you use this software
+	   in a product, an acknowledgment in the product documentation would be
+	   appreciated but is not required.  
+
+	2. Altered source versions must be plainly marked as such, and must not be
+	   misrepresented as being the original software.
+
+	3. This notice may not be removed or altered from any source
+	   distribution.
+
+	Daniel Karling
+	daniel.karling@gmail.com
+ */
+
+
+#ifndef _PNGLITE_H_
+#define _PNGLITE_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+	Enumerations for pnglite.
+	Negative numbers are error codes and 0 and up are okay responses.
+*/
+
+enum
+{
+	PNG_DONE				= 1,
+	PNG_NO_ERROR			= 0,
+	PNG_FILE_ERROR			= -1,
+	PNG_HEADER_ERROR		= -2,
+	PNG_IO_ERROR			= -3,
+	PNG_EOF_ERROR			= -4,
+	PNG_CRC_ERROR			= -5,
+	PNG_MEMORY_ERROR		= -6,
+	PNG_ZLIB_ERROR			= -7,
+	PNG_UNKNOWN_FILTER		= -8,
+	PNG_NOT_SUPPORTED		= -9,
+	PNG_WRONG_ARGUMENTS		= -10
+};
+
+/*
+	The five different kinds of color storage in PNG files.
+*/
+
+enum
+{
+	PNG_GREYSCALE			= 0,
+	PNG_TRUECOLOR			= 2,
+	PNG_INDEXED				= 3,
+	PNG_GREYSCALE_ALPHA		= 4,
+	PNG_TRUECOLOR_ALPHA		= 6
+};
+
+/*
+	Typedefs for callbacks.
+*/
+
+typedef unsigned (*png_read_callback_t)(void* output, unsigned size, unsigned numel, void* user_pointer);
+typedef void (*png_free_t)(void* p);
+typedef void * (*png_alloc_t)(unsigned s);
+
+typedef struct
+{
+	void*					zs;				// pointer to z_stream
+	png_read_callback_t		read_fun;
+	void*					user_pointer;
+
+	unsigned char*			png_data;
+	unsigned				png_datalen;
+
+	unsigned				width;
+	unsigned				height;
+	unsigned char			depth;
+	unsigned char			color_type;
+	unsigned char			compression_method;
+	unsigned char			filter_method;
+	unsigned char			interlace_method;
+	unsigned char			bpp;
+}png_t;
+
+/*
+	Function: png_init
+
+	This function initializes pnglite. The parameters can be used to set your own memory allocation routines following these formats:
+
+	> void* (*custom_alloc)(size_t s)
+	> void (*custom_free)(void* p)
+	Parameters:
+		pngalloc - Pointer to custom allocation routine. If 0 is passed, malloc from libc will be used.
+		pngfree - Pointer to custom free routine. If 0 is passed, free from libc will be used.
+
+	Returns:
+		Always returns PNG_NO_ERROR.
+*/
+
+int png_init(png_alloc_t pngalloc, png_free_t pngfree);
+
+/*
+	Function: png_open_file
+
+	This function is used to open a png file with the internal file IO system. This function should be used instead of
+	png_open if no custom read function is used.
+
+	Parameters:
+		png - Empty png_t struct.
+		filename - Filename of the file to be opened.
+
+	Returns:
+		PNG_NO_ERROR on success, otherwise an error code.
+*/
+
+int png_open_file(png_t *png, const char* filename);
+
+/*
+	Function: png_open
+
+	This function reads a png from the specified callback. The callback should be of the format:
+
+	> size_t (*png_read_callback_t)(void* output, size_t size, size_t numel, void* user_pointer).
+
+	The callback will be called each time pnglite needs more data. The callback should read as much data as requested, 
+	or return 0. This should always be possible if the PNG is sane.	If the output-buffer is a null-pointer the callback 
+	should only skip ahead the specified number of elements. If the callback is a null-pointer the user_pointer will be 
+	treated as a file pointer (use png_open_file instead).
+
+	Parameters:
+		png - png_t struct
+		read_fun - Callback function for reading.
+		user_pointer - User pointer to be passed to read_fun.
+
+	Returns:
+		PNG_NO_ERROR on success, otherwise an error code.
+*/
+
+int png_open(png_t* png, png_read_callback_t read_fun, void* user_pointer);
+
+/*
+	Function: png_print_info
+
+	This function prints some info about the opened png file to stdout.
+
+	Parameters:
+		png - png struct to get info from.
+*/
+
+void png_print_info(png_t* png);
+
+/*
+	Function: png_error_string
+
+	This function translates an error code to a human readable string.
+
+	Parameters:
+		error - Error code.
+
+	Returns:
+		Pointer to string.
+*/
+
+char* png_error_string(int error);
+
+/*
+	Function: png_get_data
+
+	This function decodes the opened png file and stores the result in data. data should be big enough to hold the decoded png. Required size will be:
+	
+	> width*height*(bytes per pixel)
+
+	Parameters:
+		data - Where to store result.
+
+	Returns:
+		PNG_NO_ERROR on success, otherwise an error code.
+*/
+
+int png_get_data(png_t* png, unsigned char* data);
+
+/*
+	Function: png_close_file
+
+	Closes an open png file pointer. Should only be used when the png has been opened with png_open_file.
+
+	Parameters:
+		png - png to close.
+	
+	Returns:
+		PNG_NO_ERROR
+*/
+
+int png_close_file(png_t* png);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif