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+// GLTools.h
+// OpenGL SuperBible
+// Copyright 1998 - 2003 Richard S. Wright Jr.
+// Code by Richard S. Wright Jr.
+// All Macros prefixed with GLT_, all functions prefixed with glt... This
+// should avoid most namespace problems
+// Some of these functions allocate memory. Use CRT functions to free
+// Report bugs to rwright@starstonesoftware.com
+
+#ifndef __GLTOOLS__LIBRARY
+#define __GLTOOLS__LIBRARY
+
+#define FREEGLUT_STATIC
+
+// Bring in OpenGL 
+// Windows
+#ifdef WIN32
+#include <windows.h>        // Must have for Windows platform builds
+#include "glee.h"            // OpenGL Extension "autoloader"
+#include <gl\gl.h>            // Microsoft OpenGL headers (version 1.1 by themselves)
+#include <gl\glu.h>            // OpenGL Utilities
+#include "glut.h"            // Glut (Free-Glut on Windows)
+#endif
+
+// Mac OS X
+#ifdef __APPLE__
+#include <Carbon/Carbon.h>    // Brings in most Apple specific stuff
+#include "glee.h"        // OpenGL Extension "autoloader"
+#include <OpenGL/gl.h>        // Apple OpenGL haders (version depends on OS X SDK version)
+#include <OpenGL/glu.h>        // OpenGL Utilities
+#include <Glut/glut.h>        // Apples Implementation of GLUT
+
+// Just ignore sleep on Apple
+#define Sleep(x)
+
+#endif
+
+#ifdef linux
+#include <GL/glew.h>
+#include <GL/freeglut.h>
+#include <GL/glx.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// Just ignore sleep in linux too
+#define Sleep(x)
+#endif
+
+#ifdef linux
+typedef GLvoid (*CallBack)();
+#else
+
+#ifndef WIN32
+typedef GLvoid (*CallBack)(...);            //  XCode (GNU) style
+#else
+typedef GLvoid (_stdcall *CallBack)();      // Visual C++ style
+#endif
+
+#endif
+
+// Needed for NURBS callbacks... VC++ vs. GNU
+/*#ifndef WIN32
+#define CALLBACK (GLvoid (*)(...))
+#else
+#define CALLBACK (GLvoid (__stdcall*)())
+#endif
+*/
+
+// Universal includes
+#include <math.h>
+
+// There is a static block allocated for loading shaders to prevent heap fragmentation
+#define MAX_SHADER_LENGTH   8192
+    
+///////////////////////////////////////////////////////
+// Macros for big/little endian happiness
+// These are intentionally written to be easy to understand what they 
+// are doing... no flames please on the inefficiency of these.
+#ifdef __BIG_ENDIAN__
+///////////////////////////////////////////////////////////
+// This function says, "this pointer is a little endian value"
+// If the value must be changed it is... otherwise, this
+// function is defined away below (on Intel systems for example)
+inline void LITTLE_ENDIAN_WORD(void *pWord)
+{
+    unsigned char *pBytes = (unsigned char *)pWord;
+    unsigned char temp;
+    
+    temp = pBytes[0];
+    pBytes[0] = pBytes[1];
+    pBytes[1] = temp;
+}
+
+///////////////////////////////////////////////////////////
+// This function says, "this pointer is a little endian value"
+// If the value must be changed it is... otherwise, this
+// function is defined away below (on Intel systems for example)
+inline void LITTLE_ENDIAN_DWORD(void *pWord)
+{
+    unsigned char *pBytes = (unsigned char *)pWord;
+    unsigned char temp;
+    
+    // Swap outer bytes
+    temp = pBytes[3];
+    pBytes[3] = pBytes[0];
+    pBytes[0] = temp;
+    
+    // Swap inner bytes
+    temp = pBytes[1];
+    pBytes[1] = pBytes[2];
+    pBytes[2] = temp;
+}
+#else
+
+// Define them away on little endian systems
+#define LITTLE_ENDIAN_WORD 
+#define LITTLE_ENDIAN_DWORD 
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+//         THE LIBRARY....
+///////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////////////
+// Load a .TGA file
+GLbyte *gltLoadTGA(const char *szFileName, GLint *iWidth, GLint *iHeight, GLint *iComponents, GLenum *eFormat);
+
+// Capute the frame buffer and write it as a .tga
+GLint gltWriteTGA(const char *szFileName);
+
+// Draw a Torus
+void gltDrawTorus(GLfloat majorRadius, GLfloat minorRadius, GLint numMajor, GLint numMinor);
+
+// Just draw a simple sphere with normals and texture coordinates
+void gltDrawSphere(GLfloat fRadius, GLint iSlices, GLint iStacks);
+
+// Draw a 3D unit Axis set
+void gltDrawUnitAxes(void);
+
+// Shader loading support
+bool bLoadShaderFile(const char *szFile, GLhandleARB shader);
+GLhandleARB gltLoadShaderPair(const char *szVertexProg, const char *szFragmentProg);
+
+// Get the OpenGL version, returns fals on error
+bool gltGetOpenGLVersion(int &nMajor, int &nMinor);
+
+// Check to see if an exension is supported
+int gltIsExtSupported(const char *szExtension);
+
+// Get the function pointer for an extension
+void *gltGetExtensionPointer(const char *szFunctionName);
+
+///////////////////////////////////////////////////////////////////////////////
+// Win32 Only
+#ifdef WIN32
+int gltIsWGLExtSupported(HDC hDC, const char *szExtension);
+#endif
+
+
+#endif
+