AnsweredAssumed Answered

Alpha / Blending overlay framebuffer fb1

Question asked by Jérôme T. on Dec 2, 2016
Latest reply on Dec 2, 2016 by Jérôme T.

Hello,

 

I'm trying to build a system headless but I'm facing many questions. I'm using imx6-dual + GPU VIV GC2000.

 

I try to use fb1 to overlay a QT window on top of a gstreamer pipeline.

 

When I enable the fb1 there is a default alpha value making anything coming from QT translucide. Through other post in this forum I understand the value MXCFB_SET_GBL_ALPHA is set somewhere between 0 to 255 but I don't how to set it my self ?

I want to remove this global alpha on fb1 set by default to make my overlay QT window being opaque on the top of my video.

I built my system using Yocto-fido so with drivers : imx-gpu-viv_5.0.11.p4.5. It seems that I don't have access to any define to set the alpha values my self.

 

Please any help is welcome.

 

Jérôme.

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