Hey Jack,

I realized I forgot to mention the image can't be in the gemwin. That is I render a bunch of stuff into a framebuffer, and add it to the video, all without ever sending it to the gemwin.

AFAIK pix_snap will only snap the gemwin, not the gemframebuffer itself? Or is this wrong?

That is I need to get the texture off the gfx card, back into pix_ domain, *without* using the gemwin to do it.

Thanks for trying! .b.

Jack wrote:

Or maybe this ;) ++

Jack

Le vendredi 27 novembre 2009 à 11:31 +0100, Jack a écrit :

...

Hello Ben,

Is it what you are looking for ? ++

Jack

Le vendredi 27 novembre 2009 à 02:51 +0000, ben@ekran.org a écrit :

...

Hey all,

I'm rendering data into a framebuffer, but want to be able to pix_add that texture with a live video input.

How can I get a gemframebuffer image from texture space into pix_ space???

Thanks, B. Bogart _______________________________________________ GEM-dev mailing list GEM-dev@iem.at http://lists.puredata.info/listinfo/gem-dev

---

GEM-dev mailing list GEM-dev@iem.at http://lists.puredata.info/listinfo/gem-dev

Hi Jack,

The image I'm wanting to get from the framebuffer into pix_ domain is not, and should never be, rendered to the gemwin.

Unless I can render stuff to the gemwin that we can't see in the gemwin, I don't see how pix_snap can help.

I suppose a workaround could be using a gemwin sized black rect to break the scene into two chunks, with two sets of render priorities, but that seems like a terrible kluge.

I think a pix_snap for framebuffers is a useful idea. pix_tex2pix?

.b.

Jack wrote:

...

AFAIK pix_snap will only snap the gemwin, not the gemframebuffer itself? Or is this wrong?

Wrong, [pix_snap] snap 'things' rendered before it receive a bang. So you can see all your scene in the gemwin and snap only one part. This is the same with [gemframebuffer]. You can snap only one part of the [gemframebuffer], that depend of the order of the rendering. Then you don't snap 'things' in the gemwin.

B. Bogart escribió:

The image I'm wanting to get from the framebuffer into pix_ domain is not, and should never be, rendered to the gemwin.

I think a pix_snap for framebuffers is a useful idea. pix_tex2pix?

Forgive my ignorance, but won't just a [gemframebuffer] and a [pix_snap] do the trick??

I actually needed to do the same thing as you (apparently) and I got it by using [gemframebuffer] and a [pìx_snap] "under" it: it snaps what is under the gemframebuffer, which is never rendered to the gemwin (unless you intentionally put it onto a rectangle)...

But maybe my "setup" was different from yours and I miss something.....

Hi Chris,

I figured that may be the only way, to put the video on the gfx card and do all the analysis as a shader.

This is the best way to go in the long term, but I don't have time to implement the video analysis as a shader (ie pix_multiblob).

Unless someone already has implemented pix_add and pix_multiblob in a shader?

Thanks, b.

chris clepper wrote:

Ben

This would be a good use for a shader. Much faster to do that way and a good way to get into GLSL too.

On Thu, Nov 26, 2009 at 9:51 PM, ben@ekran.org mailto:ben@ekran.org <ben@ekran.org mailto:ben@ekran.org> wrote:

Hey all,

I'm rendering data into a framebuffer, but want to be able to
pix_add that texture with a live video input.

How can I get a gemframebuffer image from texture space into pix_
space???

Thanks,
B. Bogart

_______________________________________________
GEM-dev mailing list
GEM-dev@iem.at <mailto:GEM-dev@iem.at>
http://lists.puredata.info/listinfo/gem-dev