Do two pass setup with dmabuf's need two serial dmabuf's?

OpenGL
1

Hi Everyone, new forum member here! :slight_smile:

I’m trying to build a v4l2 -> GL hardware only pipeline and have a first piece of code that does the v4l2 camera import -> gles render view pretty good!

But the end goal is to use GL to manipulate the streamed images before passing them to a cpu program. One of the main things I want to do is using a fast two pass process to do Gaussian blur.

My pipeline is built using a dmabuf.

My question is, to do the two pass gaussian, would I need to have another dmabuf to ping-pong with?

Is there an example with dmabuf+two pass (zero copy hardware only)?

Cheers!

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