View Full Version : displaying text on opengl

04-13-2005, 03:54 AM
How do you display simple 2d text on an opengl screen, i want to display the score of a simple game program but dont know how to show the score up on screen in an opengl environment. can someone please help???

04-13-2005, 04:25 AM
Well, the simplest way would be to use glut if you're familiar with it (though I don't know for sure if yo can use its functions if you haven't created a window using glut, but chances are you can). On the other hand there are a few libraries out there that handle the font loading for you. I'm sorry but I can't remember any names.
As a last resort you could use the operating system's fonts along with wgl (or xgl) functions to create the glyphs. I don't think it's as hard as it sounds. Good luck!

04-14-2005, 12:01 AM
You can build font (windows function CreateFont)
like that :
</font><blockquote><font size="1" face="Verdana, Arial">code:</font><hr /><pre style="font-size:x-small; font-family: monospace;">unsigned int CreateBitmapFont(char *fontName, int fontSize)
HFONT hFont;
unsigned int base;
g_HDC = GetDC(g_HDC);
base = glGenLists(96);

hFont = CreateFont(fontSize, 0, 0, 0, 600, FALSE, FALSE, FALSE, ANSI_CHARSET,
if (!hFont)
return 0;
SelectObject(g_HDC, hFont);
wglUseFontBitmaps(g_HDC, 32, 96, base);

return base;
and to print text:

void PrintString(unsigned int base, char *str)
if ((base == 0)

04-14-2005, 03:19 AM
thanks alot "DVM" and "saatric" u were spot on.

04-14-2005, 05:25 AM
There's also a number of tutorials at NeHe's site that deal with text in OpenGL.
http://nehe.gamedev.net Nehe OpenGL tutorials (http://nehe.gamedev.net)