/**
 * Draw some text on the window
 * The majority of code from this function is from the NeHe tutorial 13.
 * \param text A char pointer to the string
 * \param x The x opengl coord to draw the text at
 * \param y The y opengl coord to draw the text at
 * \param len The length of the string (if set to -1, it will be counted inside the function using 'strlen')
 */
void COpenGLDriver::drawText(const char* text, int x, int y, int len = -1)
{
	int length;

	// Don't print anything
	if( text == NULL )
		return;

	// store the length of the string (either supplied or we count it using 'strlen')
	length = (len==-1 ? strlen(text) : len);

	glColor3f(1.0f, 1.0f, 1.0f);
	// move the window position to the position to draw the text
	//glRasterPos3f(x, y, -2);
	glRasterPos3f(0, 0, -2);

	glPushAttrib(GL_LIST_BIT);	// Pushes the display list bits
	glListBase(m_fontList - 32);	// Sets the base character to 32

	glCallLists(length, GL_UNSIGNED_BYTE, text);	// Draws the display list text
	glPopAttrib();	// Pops the display list bits
}

/**
 * Set up our windows bitmap font
 * The majority of code from this function is from the NeHe tutorial 13.
 */
void COpenGLDriver::buildFont()
{
	HFONT font;			// Window font id
	HFONT oldfont;		// Used for good house keeping

	m_fontList = glGenLists(96);		// Storage for 96 characters

	font = CreateFont(		-15,	// Height of font
					0,	// Width of font
					0,	// Angle of escapement
					0,	// Orientation Angle
					FW_BOLD,// Font weight
					FALSE,	// Italic
					FALSE,	// Underline
					FALSE,	// Strikeout
					ANSI_CHARSET,	// Character set identifier
					OUT_TT_PRECIS,	// Output precision
					CLIP_DEFAULT_PRECIS,// Clipping precision
					ANTIALIASED_QUALITY,// Output quality
					FF_DONTCARE|DEFAULT_PITCH,// Family and pitch
					"Courier New");	// Font name

	oldfont = (HFONT) SelectObject(m_hdc, font);	// Selects the font we want
	wglUseFontBitmaps(m_hdc, 32, 96, m_fontList);	// Builds 96 characters starting at character 32
	SelectObject(m_hdc, oldfont);	// Selects the font we want
	DeleteObject(font);		// Delete the font
}