Full Screen Anti-Aliasing

SDL Development
1

A while back there was a discussion about adding support for full screen
anti-aliasing for OpenGL to SDL. Can someone fill me in on what got done
on the subject? If there is a URL with the information could you just
send me that?

I’m writing an article on using OpenGL with SDL and I don’t want to miss
any breaking news. I already have info on the pbuffer support that Sam
is working on.

	Many Thanks

		Bob Pendleton--

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2

Bob Pendleton wrote:

A while back there was a discussion about adding support for full screen
anti-aliasing for OpenGL to SDL. Can someone fill me in on what got done
on the subject? If there is a URL with the information could you just
send me that?

I haven’t seen any documentation about it.
There is a patch in current CVS for FSAA. It’s pretty easy to use
through SDL_GL_SetAttribute :

[snippet of my code]

SDL_InitSubSystem (SDL_INIT_VIDEO);
[…]
SDL_GL_SetAttribute (SDL_GL_RED_SIZE, 4);
SDL_GL_SetAttribute (SDL_GL_GREEN_SIZE, 4);
SDL_GL_SetAttribute (SDL_GL_BLUE_SIZE, 4);
SDL_GL_SetAttribute (SDL_GL_DEPTH_SIZE, 16);
SDL_GL_SetAttribute (SDL_GL_DOUBLEBUFFER, 1);
if (fsaa)
{
SDL_GL_SetAttribute (SDL_GL_MULTISAMPLESAMPLES, 4); // 4x FSAA
SDL_GL_SetAttribute (SDL_GL_MULTISAMPLEBUFFERS,1);
}
[…]
SDL_SetVideoMode(width, height, bpp, SDL_OPENGL);

Also, setting the SDL_GL_MULTISAMPLESAMPLES or SDL_GL_MULTISAMPLEBUFFERS
attributes when using an old SDL version doesn’t crash, but there is no
FSAA.

Stephane

3

Bob Pendleton wrote:

A while back there was a discussion about adding support for full screen
anti-aliasing for OpenGL to SDL. Can someone fill me in on what got done
on the subject? If there is a URL with the information could you just
send me that?

I haven’t seen any documentation about it.
There is a patch in current CVS for FSAA. It’s pretty easy to use
through SDL_GL_SetAttribute :

[snippet of my code]

SDL_InitSubSystem (SDL_INIT_VIDEO);
[…]
SDL_GL_SetAttribute (SDL_GL_RED_SIZE, 4);
SDL_GL_SetAttribute (SDL_GL_GREEN_SIZE, 4);
SDL_GL_SetAttribute (SDL_GL_BLUE_SIZE, 4);
SDL_GL_SetAttribute (SDL_GL_DEPTH_SIZE, 16);
SDL_GL_SetAttribute (SDL_GL_DOUBLEBUFFER, 1);
if (fsaa)
{
SDL_GL_SetAttribute (SDL_GL_MULTISAMPLESAMPLES, 4); // 4x FSAA
SDL_GL_SetAttribute (SDL_GL_MULTISAMPLEBUFFERS,1);
}
[…]
SDL_SetVideoMode(width, height, bpp, SDL_OPENGL);

Also, setting the SDL_GL_MULTISAMPLESAMPLES or SDL_GL_MULTISAMPLEBUFFERS
attributes when using an old SDL version doesn’t crash, but there is no
FSAA.

Stephane

Thanks, that is just what I needed to know.

	Bob PendletonOn Thu, 2003-08-21 at 13:35, Stephane Marchesin wrote:

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