Homebrew Project Accelerated 2D operations in SDL

mudrik · Dec 16, 2023

Hi all!
I'm happy to announce that I've added support for hardware-accelerated blit and fillrect operations to libSDL for the Wii and GameCube. I hope that the changes will be accepted into devkitPro's SDL port, but in any case in the meantime you can play with my fork (I'm not allowed to post links to this forum, but just append mardy/SDL to the github homepage and you'll find it).

The README file has step-by-step instructions on how to build the library, so hopefully it's something that you can try easily.

I've tried it on a few games already, and they do work, but they almost made no use of 2D operations (they mostly call SDL_LockSurface() and then handle pixels by hand), so this is not a full test. If you know of Wii games using SDL with many calls to SDL_FillRect or SDL_BlitSurface, please let me know, I will try to test them :-)

Now I'll go back to work on my little game, hopefully you'll get news about it in a couple of months :-)

Exidous · Dec 17, 2023

Here's OP's intended link:

https://github.com/mardy/SDL

Sounds cool, and way over my head.

I did a quick search to get my bearings and found a list of games purportedly using SDL and the only official Wii game in that list is World of Goo. https://web.archive.org/web/20090317014318/https://www.mobygames.com/game-group/middleware-sdl/. World of Goo is one of the biggest/best regarded WiiWare games. I recall it having some slowdown on a virgin Wii, too.

mudrik · Dec 17, 2023

Exidous said:
Here's OP's intended link:

https://github.com/mardy/SDL

Thanks!

As for World of Goo, as far as I understand the game is not open source, so I'm afraid there's little we can do about it. I found this nice page of SDL games on the wiibrew wiki (https://wiibrew.org/wiki/Category:Homebrew_using_SDL_libraries -- finally I can post links, too :-) ), and I tried a couple of them. They do work, but all they do is direct pixel manipulation, so using my build of SDL doesn't bring a performance benefit in their case. But if someone knows of an open source Wii SDL game that has low FPS, please let me know, maybe we can do something about it.

GateGuy · Mar 20, 2024

I mentioned this game in your SDL2 thread, but Trogdor: Reburninated is currently 25 FPS at 480p and makes heavy use of SDL_BlitSurface. If you're looking for a test, I added a branch to the repo that disables the resolution change at higher framerates so it always forces 480p.

Homebrew Project Accelerated 2D operations in SDL

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