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Opacity(or transparency?) of freescale board front buffer

Question asked by Arun Menon on Mar 21, 2016
Latest reply on Mar 29, 2016 by Arun Menon

I am running two QT application in two frame buffers of freescale board(IMX-6).

App1 in /dev/fb0( primary buffer) and other( say App 2) in dev/fb1( overlay buffer) in Ubuntu  Linux.


I can see both application together. But, my expectation is to see only

App2 running on overlay buffer. App1 running in back buffer( /de/fb0) should be visible only when App2 area is blank.


I am a beginner i.MX frame buffer area. Any command/ environment is available to set the opacity( or transparency?) of front buffer? Or I need to use alpha blending technique in my program?. I don't want to change transparency dynamically.