Sorry the example is incorrect. The commented lines should not be commented
out. Its what I get for copy and paste without thinking. Need more coffee...
> Thanks for stopping in Kai.
>
> glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
> glEnable(GL_LINE_SMOOTH);
>
> These are legacy line smoothing features.
>
> Line smoothing in Opengl using multisampling is enabled and disabled with the
> following calls:
>
> glEnable(GL_MULTISAMPLE);
> glDisable(GL_MULTISAMPLE);
>
> However this only turning MSAA on and off. In order to see the level of AA
> 1x,2,x,4x, etc you must request N samples via attributes while creating your
> opengl context
>
> Example attributes to request 4x MSAA: (you pass this array to
> glxCreateContext)
> int visual_attribs[] = {
> GLX_X_RENDERABLE,True,
> GLX_DRAWABLE_TYPE,GLX_WINDOW_BIT,
> GLX_RENDER_TYPE,GLX_RGBA_BIT,
> GLX_X_VISUAL_TYPE,GLX_TRUE_COLOR,
> GLX_RED_SIZE,8,
> GLX_GREEN_SIZE,8,
> GLX_BLUE_SIZE,8,
> GLX_ALPHA_SIZE,8,
> GLX_DEPTH_SIZE,24,
> GLX_STENCIL_SIZE,8,
> GLX_DOUBLEBUFFER,True,
> //GLX_SAMPLE_BUFFERS , 1,
> //GLX_SAMPLES , 4,
> None
> };
>
> What is not clear to me is how to control this step. I am not sure that I
> can with fltk 1.3 and if not I need to look into a) what level of AA does
> fltk 1.3 request b) how I might be able to extend or patch the API to allow
> me to do this. It's a trivial few lines of code but my assumption is that
> fltk 1.3 developers want clients to use calls to "mode" exclusively to affect
> changes to how the GL context is created.
>
> This is conjecture at this point as I have not looked over the source yet or
> talked to anyone about how this might work if my initial hunches prove to be
> true. I could be very wrong as I am still very new to fltk.
>
> > Am 02.09.09, 18:12 -0700 schrieb Shon Pritchett:
> > > Can I control the level of AA applied somehow? I believe that's my last
> > > question and I'll stop bothering you all for a few moons.
> >
> > I am not shure which of the following calls does switch the line smoothing
> > in my open source app, but here they are:
> > glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
> > glEnable(GL_LINE_SMOOTH);
> > The above works after the GL context initialisation.
> >
> > Probably OpenGL knows other switches as well.
> >
> > kind regards
> > Kai-Uwe Behrmann
> > --
> > developing for colour management
> > www.behrmann.name + www.oyranos.org
> >
>
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