feature: wgpu rendering rewrite

[pollend]

Contains

starting POC looking into using a rust backend for handling critical rendering code.

There is still a lot missing so at the moment it will take a while before this gets to a playable state. The basic gist is to move a lot of the critical rendering code to a separate rust library. will still use lwjgl mainly for GLFW basically just supplies the window and most of the handling will still happen in java code land.

Setup

• Install rust via rustup (https://www.rust-lang.org/tools/install)
• Install rust stable with rustup install stable?
• Obtain TeraRusty library with git clone https://github.com/MovingBlocks/TeraRusty.git libs/TeraRusty (groovyw isn't quite working on that branch right now)
• Run gradlew extractNatives

[skaldarnar]

I tried again to run this on my Linux machine, but could not get the game to start / a window to show up.

workspace
  engine ts-rusty                          feature/wgpu-ren… 221e454e
libs
     lib TeraRusty                         main              467e5232

I does compile some Rust code and the loading bar banner image briefly shows up before the process crashes.

RUST_BACKTRACE=1 gradlew clean extractNatives jar game

...
> Task :TeraRusty:core-rust:native_x86_64-unknown-linux-gnu
warning: unused import: `std::marker::PhantomData`
 --> src/java_util.rs:3:5
  |
3 | use std::marker::PhantomData;
  |     ^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default
...
19:33:26.021 [main] INFO  o.t.e.c.s.lwjgl.LwjglGraphics - Initializing display (if last line in log then likely the game crashed from an issue with your video card)
19:33:26.024 [main] INFO  o.t.engine.rust.NativeSupport - Loading JNBullet Library:core_rust
19:33:26.025 [main] INFO  o.t.engine.rust.NativeSupport -       Loaded from java.library.path: /home/skaldarnar/Code/movingblocks/ts-rusty/natives/linux/libcore_rust-linux-amd64.so
thread '<unnamed>' panicked at 'called `Option::unwrap()` on a `None` value', /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/khronos-egl-4.1.0/src/lib.rs:961:42
stack backtrace:
   0: rust_begin_unwind
             at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/panicking.rs:593:5
   1: core::panicking::panic_fmt
             at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/core/src/panicking.rs:67:14
   2: core::panicking::panic
             at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/core/src/panicking.rs:117:5
   3: core::option::Option<T>::unwrap
             at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/core/src/option.rs:935:21
   4: khronos_egl::egl1_0::<impl khronos_egl::Instance<T>>::make_current
             at /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/khronos-egl-4.1.0/src/lib.rs:961:10
   5: wgpu_hal::gles::egl::EglContext::make_current
             at /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-hal-0.16.1/src/gles/egl.rs:297:9
   6: <wgpu_hal::gles::egl::Instance as wgpu_hal::Instance<wgpu_hal::gles::Api>>::enumerate_adapters
             at /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-hal-0.16.1/src/gles/egl.rs:893:9
   7: wgpu_core::instance::<impl wgpu_core::hub::Global<G>>::request_adapter::gather
             at /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-core-0.16.1/src/instance.rs:767:49
   8: wgpu_core::instance::<impl wgpu_core::hub::Global<G>>::request_adapter
             at /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-core-0.16.1/src/instance.rs:839:36
   9: <wgpu::backend::direct::Context as wgpu::context::Context>::instance_request_adapter
             at /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-0.16.2/src/backend/direct.rs:568:18
  10: <T as wgpu::context::DynContext>::instance_request_adapter
             at /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-0.16.2/src/context.rs:1935:47
  11: wgpu::Instance::request_adapter
             at /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-0.16.2/src/lib.rs:1441:23
  12: core_rust::window_surface::WindowSurface::create::{{closure}}
             at ./libs/TeraRusty/core-rust/natives/src/window_surface.rs:102:23
  13: futures_executor::local_pool::block_on::{{closure}}
             at /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/futures-executor-0.3.28/src/local_pool.rs:317:23
  14: futures_executor::local_pool::run_executor::{{closure}}
             at /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/futures-executor-0.3.28/src/local_pool.rs:90:37
  15: std::thread::local::LocalKey<T>::try_with
             at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/thread/local.rs:270:16
  16: std::thread::local::LocalKey<T>::with
             at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/thread/local.rs:246:9
  17: futures_executor::local_pool::run_executor
             at /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/futures-executor-0.3.28/src/local_pool.rs:86:5
  18: futures_executor::local_pool::block_on
             at /home/skaldarnar/.cargo/registry/src/index.crates.io-6f17d22bba15001f/futures-executor-0.3.28/src/local_pool.rs:317:5
  19: core_rust::engine_kernel::EngineKernel::new
             at ./libs/TeraRusty/core-rust/natives/src/engine_kernel.rs:37:23
  20: Java_org_terasology_engine_rust_EngineKernel_00024JNI_create
             at ./libs/TeraRusty/core-rust/natives/src/jni/jni_engine_kernel.rs:49:45
  21: <unknown>

I tested this with

openjdk 11.0.15 2022-04-19 LTS
OpenJDK Runtime Environment (build 11.0.15+10-LTS)
OpenJDK 64-Bit Server VM (build 11.0.15+10-LTS, mixed mode)

and

rustc 1.71.0 (8ede3aae2 2023-07-12)

[pollend]

why is it running egl that is very strange.