Blending issue in imx6 dual quad vivante

[sooryanath58]

Hi,

I'm currently facing an issue with the final rendered image. Both background and foreground are configured as RGBA8888, when I read the fb0 and fb1 output, I don't see any issue. But finally after blending I could see the contents rendered on fb1 are bit faded, looks to be a blending issue, please help me out here to get it resolved.

Note: One display with 2 layers enabled

Regards,

Soorya

[igorpadykov]

Hi Soorya

one can look at examples:

GitHub - rogeriorps/ipu-examples: IPU example codes for i.MX5 and i.MX6 families 

i.MX6: Alpha blending example code 

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

[sooryanath58]

Hi,

Thanks for the support.

I tried controlling GLOBAL_ALPHA as 128  for both fb0 and fb1, now I'm seeing a very better image in the screen but with 50% alpha. What should be the GLOBAL_ALPHA for fb0 and fb1 to match the output in display as input?

Assumption:  fb0 as 1 and fb1 as 255, will it yield expected result?

Expectation: fb1 content shall not fade after blending with fb0.