[PD] antialiasing for gemframebuf
marius schebella
marius.schebella at gmail.com
Mon Apr 21 21:39:56 CEST 2008
I am still not sure, how I should do it. (or if it is possible at all).
I am rendering 100s of geos into a gemframebuffer once. and then put it
on a plane to use as a background image.
I would not know where I could apply any antialiasing, because I am not
dealing with textures before they are grabed by the gemframebuffer.
is there a pix_object that can do some kind of antialias filter?
but I guess that must happen already before I am in the texture domain,
at the conversion from shape to texture?
or is antialiasing an oversampling of actual pixel data? like a texture
2000*2000 gets antialiased to 500*500?
thanks,
marius.
vade wrote:
> Ah, am sorry, I did not see antialiased texture. I redact my statement.
> However if you are rendering geometry to a gem framebuffer (render to
> texture, you should be able to antialias BEFORE rendering to the FBO,
> which if things work correctly, should result in antialiased contents
> within the FBO, right?
>
> On Apr 21, 2008, at 2:50 PM, chris clepper wrote:
>> Not for an FBO. Nvidia has an extension to do this, but I only
>> recently got the hardware to test it (and that hardware is in use as
>> you know).
>>
>> On Mon, Apr 21, 2008 at 1:02 PM, vade <doktorp at mac.com
>> <mailto:doktorp at mac.com>> wrote:
>>
>> Alternatively if your render supports multisampling you could do a
>> GEM_glEnable(GL_MULTISAMPLE_ARB) or GL_MULTISAMPLE, assuming it is
>> enabled for the contexts pixel format, but that would be a good
>> solution..
>>
>> youd have to use glDefine(GL_MULTISAMPLE_ARB) however :)
>>
>>
>> On Apr 21, 2008, at 12:39 PM, B. Bogart wrote:
>>
>> > Hey Marius,
>> >
>> > I think FSAA only happens on the final render...
>> >
>> > Perhaps there is some shader cmd to AA a pix_?
>> >
>> > maybe a hypothetical pix_antialias could be useful? (but slow on the
>> > CPU) seems problem for a shader to me.
>> > .b.
>> >
>> > marius schebella wrote:
>> >> hi,
>> >> is there a way to get an antialiased texture into gemframebuffer?
>> >> marius.
>> >>
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