This library creates a "bullet-time" aka "slo-mo" effect in any game it is preloaded to.

Underneath it overloads a function clock_gettime to slow down its reports by 4 times. This was tested wth Alien Shooter 2, Dungeon Nightmares, and GTAⅣ running in WINE.

Binaries

If you don't want to build it yourself, there's an archive with prebuilt libraries on releases page

Building

Assuming you're on x86_64 platform, use

cargo build --release
cargo build --release --target i686-unknown-linux-gnu

to build 64 and 32 bit versions. If you get an error note: the i686-unknown-linux-gnu target may not be installed, you may need to add the i686-unknown-linux-gnu target, e.g. with rustup target install i686-unknown-linux-gnu.

Using

Just place paths into LD_PRELOAD. Unless you're sure whether you need 32 or 64 bit version, I recommend using them both. It won't hurt, the wrong bittness version just won't get loaded. Example from my system:

LD_PRELOAD="/home/constantine/Projects/clock_gettime_override/target/i686-unknown-linux-gnu/release/libclock_gettime_override.so /home/constantine/Projects/clock_gettime_override/target/release/libclock_gettime_override.so" wine AlienShooter.exe

FAQ

1. How do I know if a game is using this function?

   Run the game, find its pid with ps aux | grep game, and attach to it with strace -p game-pid. You'll see a bunch of system calls that the game does, something about time in particular should come up a lot. If it's a function clock_gettime, then it most likely gonna work.