Initial commit - some engine bugs stopping compiling

third-party/glad/example/rust/gl-glfw/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "gl-glfw"
+version = "0.1.0"
+
+[dependencies]
+glfw = "0.37.0"
+glad-gl = { path = "./build/glad-gl" }
+

third-party/glad/example/rust/gl-glfw/README.md

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+Example: gl-glfw
+================
+
+
+This is basic example showcasing `glad-gl` in combination with 
+[`glfw`](https://crates.io/crates/glfw).
+
+To run the example use the following command:
+
+```sh
+./init.sh && cargo run
+```
+
+The `init.sh` script is just a small utility used to generate
+the `glad-gl` crate into the `build/` directory. The `Cargo.toml`
+references the dependency using:
+
+```toml
+[dependencies]
+glad-gl = { path = "./build/glad-gl" }
+```
+
+This example is the basic example of the 
+[glfw crate](https://crates.io/crates/glfw) with some 
+OpenGL instructions added and just one additional line 
+to initialize `glad`:
+
+```rust
+    gl::load(|e| glfw.get_proc_address_raw(e) as *const std::os::raw::c_void);
+```
+
+That's all that is needed to initialize and use OpenGL using `glad`!
+

third-party/glad/example/rust/gl-glfw/init.sh

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+#!/bin/sh
+
+BASE_PATH="$(dirname $(realpath $0))"
+
+
+cd "${BASE_PATH}/../../../"
+
+python -m glad --out-path "${BASE_PATH}/build" --extensions="" --api="gl:core=3.3" rust
+

third-party/glad/example/rust/gl-glfw/src/main.rs

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+extern crate glfw;
+extern crate glad_gl;
+use glfw::{Action, Context, Key};
+use glad_gl::gl;
+
+
+fn main() {
+    let mut glfw = glfw::init(glfw::FAIL_ON_ERRORS).unwrap();
+
+    let (mut window, events) = glfw.create_window(300, 300, "[glad] Rust - OpenGL with GLFW", glfw::WindowMode::Windowed)
+        .expect("Failed to create GLFW window.");
+
+    window.set_key_polling(true);
+    window.make_current();
+
+    gl::load(|e| glfw.get_proc_address_raw(e) as *const std::os::raw::c_void);
+
+    while !window.should_close() {
+        glfw.poll_events();
+        for (_, event) in glfw::flush_messages(&events) {
+            handle_window_event(&mut window, event);
+        }
+
+        unsafe {
+            gl::ClearColor(0.7, 0.9, 0.1, 1.0);
+            gl::Clear(gl::COLOR_BUFFER_BIT);
+        }
+
+        window.swap_buffers();
+    }
+}
+
+fn handle_window_event(window: &mut glfw::Window, event: glfw::WindowEvent) {
+    match event {
+        glfw::WindowEvent::Key(Key::Escape, _, Action::Press, _) => {
+            window.set_should_close(true)
+        }
+        _ => {}
+    }
+}