show image in frame buffer (/dev/fbX)

ranchu

Guru 20755 points

Hello,

I once saw that it is possible to display image in frame buffer (/dev/fb0)

But trying to do that now I encounter some difficulties.

How can we know the physical or virtual address of frame buffer (I am using psplash utility to render image) ?

Is there a wiki which shows the steps ?

Regards,

Ran

over 9 years ago

0 Prabhakar Lad over 9 years ago

Guru 11260 points

Hello,

You can just do it by doing the cat of bmp file to fb device.

But you just need to check if your device supports 8/16 bit and have a bmp of that type.

Cheers,
--Prabhakar Lad

0 ranchu over 9 years ago in reply to Prabhakar Lad

Guru 20755 points

Hi Prabhakar,

Thank for the idea.
I actually need the opposite thing (not to display a bmp but), to check the current content of frame buffer.

Is it just by doing
cat /dev/fb0 > myfile
?

Thanks,
Ran

Processors

Processors forum

show image in frame buffer (/dev/fbX)