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Grub multiboot framebuffer_bpp value https://forum.osdev.org/viewtopic.php?f=1&t=33832 |
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Author: | tommasop [ Fri Aug 16, 2019 6:14 am ] |
Post subject: | Grub multiboot framebuffer_bpp value |
Hi, i don't really understand the value inside framebuffer_bpp in the multiboot info. For every video mode i set the bpp in this field are always different from the one i specified in the header. To make an example: When i set video mode 1024*768 32bpp, in the multiboot i find 20bpp, at first i tought that maybe the problem was how i wrote pixels on screen, so i tried different colors but they all seems right so i suppose the bpp really are 32 and not 20. So why do grub tells me i have 20? Thanks. |
Author: | Octocontrabass [ Fri Aug 16, 2019 6:17 am ] |
Post subject: | Re: Grub multiboot framebuffer_bpp value |
Are you sure that's 20 and not 0x20? (0x20 is 32) Other than that, maybe there's a problem with how you're reading the multiboot info. |
Author: | tommasop [ Fri Aug 16, 2019 6:21 am ] |
Post subject: | Re: Grub multiboot framebuffer_bpp value |
Octocontrabass wrote: Are you sure that's 20 and not 0x20? (0x20 is 32) Other than that, maybe there's a problem with how you're reading the multiboot info. Damn, you're right, thanks. I'm such an idiot... |
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