Vendor things

third-party/vendor/metal/examples/raytracing/main.rs

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+extern crate objc;
+
+use cocoa::{appkit::NSView, base::id as cocoa_id};
+use core_graphics_types::geometry::CGSize;
+use metal::*;
+use objc::{rc::autoreleasepool, runtime::YES};
+use std::mem;
+use winit::{
+    event::{Event, WindowEvent},
+    event_loop::ControlFlow,
+    platform::macos::WindowExtMacOS,
+};
+
+pub mod camera;
+pub mod geometry;
+pub mod renderer;
+pub mod scene;
+
+fn find_raytracing_supporting_device() -> Device {
+    for device in Device::all() {
+        if !device.supports_raytracing() {
+            continue;
+        }
+        if device.is_low_power() {
+            continue;
+        }
+        return device;
+    }
+
+    panic!("No device in this machine supports raytracing!")
+}
+
+fn main() {
+    let events_loop = winit::event_loop::EventLoop::new();
+    let size = winit::dpi::LogicalSize::new(800, 600);
+
+    let window = winit::window::WindowBuilder::new()
+        .with_inner_size(size)
+        .with_title("Metal Raytracing Example".to_string())
+        .build(&events_loop)
+        .unwrap();
+
+    let device = find_raytracing_supporting_device();
+
+    let layer = MetalLayer::new();
+    layer.set_device(&device);
+    layer.set_pixel_format(MTLPixelFormat::RGBA16Float);
+    layer.set_presents_with_transaction(false);
+
+    unsafe {
+        let view = window.ns_view() as cocoa_id;
+        view.setWantsLayer(YES);
+        view.setLayer(mem::transmute(layer.as_ref()));
+    }
+
+    let draw_size = window.inner_size();
+    let cg_size = CGSize::new(draw_size.width as f64, draw_size.height as f64);
+    layer.set_drawable_size(cg_size);
+
+    let mut renderer = renderer::Renderer::new(device);
+    renderer.window_resized(cg_size);
+
+    events_loop.run(move |event, _, control_flow| {
+        autoreleasepool(|| {
+            *control_flow = ControlFlow::Poll;
+
+            match event {
+                Event::WindowEvent { event, .. } => match event {
+                    WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
+                    WindowEvent::Resized(size) => {
+                        let size = CGSize::new(size.width as f64, size.height as f64);
+                        layer.set_drawable_size(size);
+                        renderer.window_resized(size);
+                    }
+                    _ => (),
+                },
+                Event::MainEventsCleared => {
+                    window.request_redraw();
+                }
+                Event::RedrawRequested(_) => {
+                    renderer.draw(&layer);
+                }
+                _ => {}
+            }
+        });
+    });
+}