Posts: 1
Joined: Thu Jun 27, 2019 7:10 am

framebuffer conversion in kernel

Thu Jun 27, 2019 7:46 am

I am use a profjector(without keystone correction) on Pi 3b+ , however the wall i want project is at a 45-degree, need to do a keystone correction.

I am wondering can i modify the framebuffer as a trapezoid through a lookup table computed in advance, after that when project at the wall ,the display will be right.

So i want to know where should i do the modification in the kernal source .

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