CentOS - Mar 2014 - Changing isolinux/splash.jpg on custom ISO

Hi all,

   I know I've done this in the past, but I can't seem to get it working
today...

   I want to roll my own ISO and use custom splash.jpg. If I roll the 
ISO with the stock splash.jpg, it works. When I save my own 800x600 .jpg 
as splash.jpg though, I get a black screen. I made sure the permissions 
and ownership was the same.

   Is there a special way that the JPG has to be save for it to be used?

Thanks!

-- 
Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without 
access to education?

On 22/03/14 02:02 PM, Digimer wrote:
> Hi all,
>
>     I know I've done this in the past, but I can't seem to get it
working
> today...
>
>     I want to roll my own ISO and use custom splash.jpg. If I roll the
> ISO with the stock splash.jpg, it works. When I save my own 800x600 .jpg
> as splash.jpg though, I get a black screen. I made sure the permissions
> and ownership was the same.
>
>     Is there a special way that the JPG has to be save for it to be used?
>
> Thanks!
Got it, I found a fedora howto[1] that gave me the secret. Had to 
convert the image to 16-bit.

1. https://fedoraproject.org/wiki/How_to_create_a_custom_syslinux_splash

-- 
Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without 
access to education?

On 3/22/14, Digimer <lists at alteeve.ca> wrote:
>    I want to roll my own ISO and use custom splash.jpg. If I roll the
> ISO with the stock splash.jpg, it works. When I save my own 800x600 .jpg
> as splash.jpg though, I get a black screen. I made sure the permissions
> and ownership was the same.
>
>    Is there a special way that the JPG has to be save for it to be used?
The procedure I know is:

- Create a full color PNG image (holding your own graphic design)
- Create an indexed image of 16 colors based on your full color PNG image?
- Transform the indexed image into LSS format using the correct order
of colors. The LSS format is what isolinux finally reads, not the PNG
image. If the order of colors is not the same in both the indexed
image and the LSS image, the final result may not be displayed as you
expect.

There is some automation around this at:

-
https://git.centos.org/blob/sig-core!artwork.git/1200298db99597c567f0e06131941b48aae3f8da/Scripts!Modules!Render!Modules!Files!Modules!Palette!palette.sh

Best Regards,
al.