I would like to patch grub to display a custom picture before loading the linux kernel.
The final goal is to have the picture being shown until the kernel finishes loading.
I did the following:
1. I customized the theme loader to recognize "desktop-image-boot" as keyword
2. I added a field desktop_image_boot in "struct grub_gfxmenu_view"
I managed to load the image provided by the user via the theme.
Now I wonder how and when to ask grub to display the boot image.
First guess is grub_menu_execute_entry - when the user presses ENTER.
Second guess (more logical and more general, since the user might get into a submenu by pressing ENTER) - is grub_loader_boot.
I was considering calling this block:
view->desktop_image = scaled_bitmap;
view->desktop_image_boot = scaled_bitmap;
However, I don't know how to get the view and I'm not sure the image would actually be displayed. Furthermore, I'm not sure the view still exists in grub_loader_boot.
Could you send me at least a hint, please?
Thanks in advance,