OpenGL 1.2 under Windows

OpenGL OpenGL: Advanced Coding
1

I have seen a number of OpenGL graphocs cards that claim to have full support for OpenGL 1.2. However, the Microsoft OpenGL headers, libraries and DLL’s currently only support OpenGL 1.1. So how do you access the OpenGL 1.2 features of these new cards under Windows?

2

You have to use extensions to access features above 1.1

Very lame on Microsofts behalf… come on M$ sort it out!!

Nutty

3

mark kilguard has written a nice article http://www.opengl.org/developers/code/features/OGLextensions/OGLextensions.html

4

Hi,

Originally posted by Nutty:
You have to use extensions to access features above 1.1

Wrong.

Use wglGetProcAddress(1_2_function).

for example
nvidia provides 1.2 opengl.3D textures are necessary part of 1.2,but nvidia has no EXT_texture_3d.

[This message has been edited by Michail Bespalov (edited 03-28-2001).]

5

Fair enough. But that doesn’t make what I said wrong.

Aren’t 3D textures supported in software? I’m sure they’re mentioned somwhere in nvidia’s latest extension specification list.

Nutty

6

Originally posted by Nutty:
Aren’t 3D textures supported in software?Nutty

yes,so what?

if you want access 1.2 features use 1.2 functions,analogous extensions are not guaranteed.

wglGetProcAddress(“glTexImage3D”) - success
wglGetProcAddress(“glTexImage3DEXT”) - failure

7

[b]

if you want access 1.2 features use 1.2 functions,analogous extensions are not guaranteed.

wglGetProcAddress(“glTexImage3D”) - success
wglGetProcAddress(“glTexImage3DEXT”) - failure

[/b]

and wgl is no extension???

8

They are not extensions, but rather platform specific OpenGL functions. You don’t have to see if they exists before using them, because they are a part of OpenGL for Win32.