i.MX ProcessorsのトピックRe: I.MX8QM Video Overlay - Using OpenGL ES / 2D / Wayland /V4l2

I.MX8QM Video Overlay - Using OpenGL ES / 2D / Wayland /V4l2

RameshChandrakasan — Wed, 16 Jun 2021 11:36:31 GMT

Dear Experts

I want to Overlay the Graphics Rendering on top of camera Display .

Here, To create Drawing , I am using Open GL library ( Wayland client) , Video Display I am using V4L2 Application. Both are working independently , How to create transparency for top graphics layer over the bottom layer video display from camera.

Note : Pls do not suggest any gst-streamer api - it is over head

Pls suggest.

Ramesh

Re: I.MX8QM Video Overlay - Using OpenGL ES / 2D / Wayland /V4l2

Bio_TICFSL — Wed, 16 Jun 2021 13:31:55 GMT

Hello Ramesh,

You can use alpha blending:

https://www.yoctoproject.org/pipermail/meta-freescale/2014-November/011329.html

https://community.nxp.com/t5/iMX-and-Vybrid-Support/OpenGL-textures-blended-with-G2D/m-p/600239

Regards

Re: I.MX8QM Video Overlay - Using OpenGL ES / 2D / Wayland /V4l2

RameshChandrakasan — Thu, 17 Jun 2021 07:13:38 GMT

Dear Expert,

I have referred the two links

Link 2) is showing Access denied, Even though i have logged in.

Link1) is describing the method using fb0 & fb1 frame buffer.

Current I.MX8QM BSP , We could able to do open gl programming using Wayland frame work context Only. There is no direct egl option available.

Q 1) I have tried with Open GL programming with egl Context api , it is NOT working. Pls comment on this for i.MX8QM yocto BSPs

Q2) Can i use

err = ioctl(fd_fb,MXCFB_SET_CLR_KEY,&c); On top of Wayland frame work? , or It need egl context only

Regards

Ramesh

Re: I.MX8QM Video Overlay - Using OpenGL ES / 2D / Wayland /V4l2

RameshChandrakasan — Fri, 02 Jul 2021 09:19:49 GMT

Dear BIO_TICFSL

Any update / suggestion When to enable the Alpha blending? i.MX8QM

Here, We have left only with Wayland fame work to create window for Open GL E.S app development.

So , egl Window api is not working.

Which windowing API is used to enable alpha blending for video overlaying.

Regards

Ramesh

Re: I.MX8QM Video Overlay - Using OpenGL ES / 2D / Wayland /V4l2

RameshChandrakasan — Mon, 12 Jul 2021 06:51:38 GMT

Dear Bio_TICFS

Pls provide the pragmatic solution for the struggle.

We are trying many methods .

Due to fundamental egl api [FB] is not properly working in IMX8QM , it not possible to thinks of i.mx8qm as Open GL enabled Device.

Pls address this issue with concern driver developer team in NXP.

Regards

Ramesh