Graphics on a bootloader

Question

Managed to create a simple bootloader... and with VESA 2.0 I managed to change the resolution to 1024x768x32, also managed to setup a Linear Frame Buffer... Where can I find tutorials for using the frame buffer? Like lets say to display a picture before it finishes to load?

So far I saw one sample on how to "draw" an ipod...called CdPod

@Fredrick: Hi I am also creating bootloader created first stage to display "Hello World". I want to load second stage from first stage bootloader. Can you please refer me a link which can show me how achieve it? Here is my question http://stackoverflow.com/questions/2065370/how-to-load-second-stage-boot-loader-from-first-stage — Xinus, Jan 15 '10 at 08:04

score 2 · Accepted Answer · answered Dec 20 '09 at 15:50

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If you have the address of the linear framebuffer all you need to do is to copy the raw image data to it's location.

answered Dec 20 '09 at 15:50

Nils Pipenbrinck

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Is it really that hard? memcpy (video_address, image_address, 1280*768*32); should do the trick. – Nils Pipenbrinck Dec 20 '09 at 22:52
I managed to find how to use the lfb from singularity os, even though the code was in c# it can easily be ported to c – Fredrick Jan 17 '10 at 14:05

score 1 · Answer 2 · answered Dec 20 '09 at 15:33

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I'm sorry I never tried to code a bootloader however maybe you can find your way looking at the source code of XOSL.

answered Dec 20 '09 at 15:33

Gregory Pakosz

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score 1 · Answer 3 · answered Dec 20 '09 at 15:47

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Check out the syslinux project on syslinux.zytor.com - you should find some code for it in that project

answered Dec 20 '09 at 15:47

Homie

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score 1 · Answer 4 · edited Sep 20 '15 at 10:45

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Grub? It's open source, you may check how it works.

edited Sep 20 '15 at 10:45

Ciro Santilli OurBigBook.com

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answered Dec 20 '09 at 15:50

xiaoming li

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score 1 · Answer 5 · answered Dec 20 '09 at 15:59

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It's for x86 architecture?
If true, then look for old DOS tutorials for working with video memory.
May be something like that: "Farpointers and video in DJGPP"

Really, all new is well forgotten old :-)

answered Dec 20 '09 at 15:59

ThinkJet

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Graphics on a bootloader

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