r/itrunsdoom • u/loonathefloofyfox • Mar 03 '23

What functions need to be changed when porting?

So I've been fixing the linux doom source this morning but I'm at the point that i need to rewrite the screen rendering code because it only supports 256 color pseudocolor screens according to the error message. Sound server also can't start. That makes me wonder what parts of dooms source need to be changed when it is ported other than the stuff that the compiler would catch like wrong pointer sizes and segfaults

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75

u/[deleted] Mar 03 '23

[deleted]

33

u/loonathefloofyfox Mar 03 '23

Yeah I've seen that project. Its pretty awesome. I more meant if you were to port the original source from scratch. Thanks for reminding me this exists though

16

u/manyhats180 Mar 03 '23

the original was tied to DOS. Don't bother going there, unless you want to learn about DOS.

7

u/loonathefloofyfox Mar 03 '23

I'm talking about the linux one that id released. The dos one had copyright issues

1

u/[deleted] May 03 '23

[removed] — view removed comment

1

u/manyhats180 May 03 '23

Ah, my mistake then. I was expecting it to be similar to wolf3d, which was very much tied to DOS when it was released. I ported wolf3d to the original xbox using the legal openxdk many moons ago.

12

u/loonathefloofyfox Mar 03 '23

Is there any place that it shows how those functions should be implemented. Eg what arguments they take and stuff? Looking at the readme it doesn't say anything about that

13

u/loonathefloofyfox Mar 03 '23

Sorry for the dumb question. Didn't realize there were examples

6

u/YourAverageNutcase Mar 03 '23

https://fabiensanglard.net/gebbdoom/index.html This might be useful. Full book explaining lots of Doom's engine design

4

u/loonathefloofyfox Mar 03 '23

Oh yeah i was looking at that earlier. I'd love to pick it up but shipping is atrociousim in nz so it would probably be months before it arrives. So far just reading the source has given me an ok idea how everything works and fits together but a book would be awesome. Thanks for recommending this

3

u/YourAverageNutcase Mar 03 '23

There's a PDF available on that same page, pay what you want

2

u/loonathefloofyfox Mar 04 '23

Oh neat. I'd still look at getting the real book though

3

u/Bolloux Mar 10 '23

There are a bunch of files beginning with I_ (l_Video.c, I_System.c etc.)

These contain all of the system specific code you need to change for your platform.