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|
use cocoa::{appkit::NSView, base::id as cocoa_id};
use core_graphics_types::geometry::CGSize;
use metal::*;
use objc::{rc::autoreleasepool, runtime::YES};
use winit::{
event::{Event, WindowEvent},
event_loop::ControlFlow,
platform::macos::WindowExtMacOS,
};
use std::mem;
struct App {
pub _device: Device,
pub command_queue: CommandQueue,
pub layer: MetalLayer,
pub image_fill_cps: ComputePipelineState,
pub width: u32,
pub height: u32,
}
fn select_device() -> Option<Device> {
let devices = Device::all();
for device in devices {
if device.supports_dynamic_libraries() {
return Some(device);
}
}
None
}
impl App {
fn new(window: &winit::window::Window) -> Self {
let device = select_device().expect("no device found that supports dynamic libraries");
let command_queue = device.new_command_queue();
let layer = MetalLayer::new();
layer.set_device(&device);
layer.set_pixel_format(MTLPixelFormat::BGRA8Unorm);
layer.set_presents_with_transaction(false);
layer.set_framebuffer_only(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();
layer.set_drawable_size(CGSize::new(draw_size.width as f64, draw_size.height as f64));
// compile dynamic lib shader
let dylib_src_path = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
.join("examples/shader-dylib/test_dylib.metal");
let install_path =
std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("target/test_dylib.metallib");
let dylib_src = std::fs::read_to_string(dylib_src_path).expect("bad shit");
let opts = metal::CompileOptions::new();
opts.set_library_type(MTLLibraryType::Dynamic);
opts.set_install_name(install_path.to_str().unwrap());
let lib = device
.new_library_with_source(dylib_src.as_str(), &opts)
.unwrap();
// create dylib
let dylib = device.new_dynamic_library(&lib).unwrap();
dylib.set_label("test_dylib");
// optional: serialize binary blob that can be loaded later
let blob_url = String::from("file://") + install_path.to_str().unwrap();
let url = URL::new_with_string(&blob_url);
dylib.serialize_to_url(&url).unwrap();
// create shader that links with dylib
let shader_src_path = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
.join("examples/shader-dylib/test_shader.metal");
let shader_src = std::fs::read_to_string(shader_src_path).expect("bad shit");
let opts = metal::CompileOptions::new();
// add dynamic library to link with
let libraries = [dylib.as_ref()];
opts.set_libraries(&libraries);
// compile
let shader_lib = device
.new_library_with_source(shader_src.as_str(), &opts)
.unwrap();
let func = shader_lib.get_function("test_kernel", None).unwrap();
// create pipeline state
// linking occurs here
let image_fill_cps = device
.new_compute_pipeline_state_with_function(&func)
.unwrap();
Self {
_device: device,
command_queue,
layer,
image_fill_cps,
width: draw_size.width,
height: draw_size.height,
}
}
fn resize(&mut self, width: u32, height: u32) {
self.layer
.set_drawable_size(CGSize::new(width as f64, height as f64));
self.width = width;
self.height = height;
}
fn draw(&self) {
let drawable = match self.layer.next_drawable() {
Some(drawable) => drawable,
None => return,
};
let w = self.image_fill_cps.thread_execution_width();
let h = self.image_fill_cps.max_total_threads_per_threadgroup() / w;
let threads_per_threadgroup = MTLSize::new(w, h, 1);
let threads_per_grid = MTLSize::new(self.width as _, self.height as _, 1);
let command_buffer = self.command_queue.new_command_buffer();
{
let encoder = command_buffer.new_compute_command_encoder();
encoder.set_compute_pipeline_state(&self.image_fill_cps);
encoder.set_texture(0, Some(&drawable.texture()));
encoder.dispatch_threads(threads_per_grid, threads_per_threadgroup);
encoder.end_encoding();
}
command_buffer.present_drawable(&drawable);
command_buffer.commit();
}
}
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 Shader Dylib Example".to_string())
.build(&events_loop)
.unwrap();
let mut app = App::new(&window);
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) => {
app.resize(size.width, size.height);
}
_ => (),
},
Event::MainEventsCleared => {
window.request_redraw();
}
Event::RedrawRequested(_) => {
app.draw();
}
_ => {}
}
});
});
}
|
