2024-02-12 16:12:08 +11:00
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#![deny(unsafe_op_in_unsafe_fn)]
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use core::{cell::OnceCell, ptr::NonNull};
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2024-02-12 16:43:51 +11:00
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use std::sync::RwLock;
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2024-02-12 16:12:08 +11:00
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2024-02-13 11:43:28 +11:00
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use icrate::Metal::{
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MTLBlitCommandEncoder, MTLClearColor, MTLTexture, MTLTextureDescriptor,
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MTLTextureUsageRenderTarget,
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};
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2024-02-12 16:12:08 +11:00
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use icrate::{
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AppKit::{
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NSApplication, NSApplicationActivationPolicyRegular, NSApplicationDelegate,
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NSBackingStoreBuffered, NSWindow, NSWindowStyleMaskClosable, NSWindowStyleMaskResizable,
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NSWindowStyleMaskTitled,
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},
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Foundation::{
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ns_string, MainThreadMarker, NSDate, NSNotification, NSObject, NSObjectProtocol, NSPoint,
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NSRect, NSSize,
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},
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Metal::{
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MTLCommandBuffer, MTLCommandEncoder, MTLCommandQueue, MTLCreateSystemDefaultDevice,
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MTLDevice, MTLDrawable, MTLLibrary, MTLPrimitiveTypeTriangle, MTLRenderCommandEncoder,
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MTLRenderPipelineDescriptor, MTLRenderPipelineState,
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},
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MetalKit::{MTKView, MTKViewDelegate},
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};
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2024-02-12 16:43:51 +11:00
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use librashader_common::Viewport;
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2024-02-12 16:12:08 +11:00
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use librashader_presets::ShaderPreset;
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use librashader_runtime_metal::FilterChainMetal;
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use objc2::{
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declare_class, msg_send_id, mutability::MainThreadOnly, rc::Id, runtime::ProtocolObject,
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ClassType, DeclaredClass,
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};
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#[rustfmt::skip]
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const SHADERS: &str = r#"
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#include <metal_stdlib>
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struct SceneProperties {
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float time;
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};
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struct VertexInput {
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metal::packed_float3 position;
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metal::packed_float3 color;
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};
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struct VertexOutput {
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metal::float4 position [[position]];
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metal::float4 color;
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};
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vertex VertexOutput vertex_main(
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device const SceneProperties& properties [[buffer(0)]],
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device const VertexInput* vertices [[buffer(1)]],
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uint vertex_idx [[vertex_id]]
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) {
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VertexOutput out;
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VertexInput in = vertices[vertex_idx];
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out.position =
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metal::float4(
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metal::float2x2(
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metal::cos(properties.time), -metal::sin(properties.time),
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metal::sin(properties.time), metal::cos(properties.time)
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) * in.position.xy,
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in.position.z,
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1);
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out.color = metal::float4(in.color, 1);
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return out;
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}
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fragment metal::float4 fragment_main(VertexOutput in [[stage_in]]) {
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return in.color;
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}
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"#;
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#[derive(Copy, Clone)]
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#[repr(C)]
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pub struct SceneProperties {
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pub time: f32,
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}
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#[derive(Copy, Clone)]
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#[repr(C)]
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pub struct VertexInput {
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pub position: Position,
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pub color: Color,
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}
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#[derive(Copy, Clone)]
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// NOTE: this has the same ABI as `MTLPackedFloat3`
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#[repr(C)]
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pub struct Position {
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pub x: f32,
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pub y: f32,
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pub z: f32,
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}
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#[derive(Copy, Clone)]
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// NOTE: this has the same ABI as `MTLPackedFloat3`
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#[repr(C)]
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pub struct Color {
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pub r: f32,
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pub g: f32,
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pub b: f32,
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}
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macro_rules! idcell {
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($name:ident => $this:expr) => {
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$this.ivars().$name.set($name).expect(&format!(
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"ivar should not already be initialized: `{}`",
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stringify!($name)
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));
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};
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($name:ident <= $this:expr) => {
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#[rustfmt::skip]
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let Some($name) = $this.ivars().$name.get() else {
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unreachable!(
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"ivar should be initialized: `{}`",
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stringify!($name)
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)
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};
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};
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}
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// declare the desired instance variables
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struct Ivars {
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start_date: Id<NSDate>,
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command_queue: OnceCell<Id<ProtocolObject<dyn MTLCommandQueue>>>,
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pipeline_state: OnceCell<Id<ProtocolObject<dyn MTLRenderPipelineState>>>,
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2024-02-12 16:43:51 +11:00
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filter_chain: OnceCell<RwLock<FilterChainMetal>>,
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2024-02-12 16:12:08 +11:00
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window: OnceCell<Id<NSWindow>>,
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}
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// declare the Objective-C class machinery
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declare_class!(
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struct Delegate;
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// SAFETY:
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// - The superclass NSObject does not have any subclassing requirements.
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// - Main thread only mutability is correct, since this is an application delegate.
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// - `Delegate` does not implement `Drop`.
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unsafe impl ClassType for Delegate {
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type Super = NSObject;
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type Mutability = MainThreadOnly;
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const NAME: &'static str = "Delegate";
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}
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impl DeclaredClass for Delegate {
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type Ivars = Ivars;
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}
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unsafe impl NSObjectProtocol for Delegate {}
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// define the delegate methods for the `NSApplicationDelegate` protocol
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unsafe impl NSApplicationDelegate for Delegate {
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#[method(applicationDidFinishLaunching:)]
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#[allow(non_snake_case)]
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unsafe fn applicationDidFinishLaunching(&self, _notification: &NSNotification) {
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let mtm = MainThreadMarker::from(self);
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// create the app window
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let window = {
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let content_rect = NSRect::new(NSPoint::new(0., 0.), NSSize::new(768., 768.));
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let style = NSWindowStyleMaskClosable
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| NSWindowStyleMaskResizable
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| NSWindowStyleMaskTitled;
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let backing_store_type = NSBackingStoreBuffered;
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let flag = false;
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unsafe {
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NSWindow::initWithContentRect_styleMask_backing_defer(
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mtm.alloc(),
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content_rect,
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style,
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backing_store_type,
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flag,
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)
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}
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};
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// get the default device
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let device = {
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let ptr = unsafe { MTLCreateSystemDefaultDevice() };
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unsafe { Id::retain(ptr) }.expect("Failed to get default system device.")
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};
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// create the command queue
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let command_queue = device
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.newCommandQueue()
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.expect("Failed to create a command queue.");
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// create the metal view
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let mtk_view = {
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let frame_rect = window.frame();
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unsafe { MTKView::initWithFrame_device(mtm.alloc(), frame_rect, Some(&device)) }
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};
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// create the pipeline descriptor
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let pipeline_descriptor = MTLRenderPipelineDescriptor::new();
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unsafe {
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pipeline_descriptor
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.colorAttachments()
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.objectAtIndexedSubscript(0)
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.setPixelFormat(mtk_view.colorPixelFormat());
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}
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// compile the shaders
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let library = device
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.newLibraryWithSource_options_error(ns_string!(SHADERS), None)
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.expect("Failed to create a library.");
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// configure the vertex shader
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let vertex_function = library.newFunctionWithName(ns_string!("vertex_main"));
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pipeline_descriptor.setVertexFunction(vertex_function.as_deref());
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// configure the fragment shader
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let fragment_function = library.newFunctionWithName(ns_string!("fragment_main"));
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pipeline_descriptor.setFragmentFunction(fragment_function.as_deref());
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// create the pipeline state
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let pipeline_state = device
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.newRenderPipelineStateWithDescriptor_error(&pipeline_descriptor)
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.expect("Failed to create a pipeline state.");
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let preset =
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ShaderPreset::try_parse("../test/shaders_slang/crt/crt-royale.slangp").unwrap();
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let filter_chain = FilterChainMetal::load_from_preset(
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preset,
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&command_queue,
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None,
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)
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.unwrap();
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2024-02-12 16:43:51 +11:00
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let filter_chain = RwLock::new(filter_chain);
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2024-02-12 16:12:08 +11:00
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// configure the metal view delegate
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unsafe {
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let object = ProtocolObject::from_ref(self);
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mtk_view.setDelegate(Some(object));
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}
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// configure the window
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window.setContentView(Some(&mtk_view));
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window.center();
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window.setTitle(ns_string!("metal example"));
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window.makeKeyAndOrderFront(None);
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// initialize the delegate state
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idcell!(command_queue => self);
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idcell!(pipeline_state => self);
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idcell!(filter_chain => self);
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idcell!(window => self);
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}
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}
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// define the delegate methods for the `MTKViewDelegate` protocol
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unsafe impl MTKViewDelegate for Delegate {
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#[method(drawInMTKView:)]
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#[allow(non_snake_case)]
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unsafe fn drawInMTKView(&self, mtk_view: &MTKView) {
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idcell!(command_queue <= self);
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idcell!(pipeline_state <= self);
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2024-02-12 16:43:51 +11:00
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idcell!(filter_chain <= self);
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2024-02-12 16:12:08 +11:00
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unsafe {
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2024-02-12 16:43:51 +11:00
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mtk_view.setFramebufferOnly(false);
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2024-02-12 16:12:08 +11:00
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mtk_view.setClearColor(MTLClearColor {
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red: 0.3,
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blue: 0.5,
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green: 0.3,
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alpha: 0.0,
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});
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}
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// FIXME: icrate `MTKView` doesn't have a generated binding for `currentDrawable` yet
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// (because it needs a definition of `CAMetalDrawable`, which we don't support yet) so
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// we have to use a raw `msg_send_id` call here instead.
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let current_drawable: Option<Id<ProtocolObject<dyn MTLDrawable>>> =
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msg_send_id![mtk_view, currentDrawable];
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// prepare for drawing
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let Some(current_drawable) = current_drawable else {
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return;
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};
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let Some(command_buffer) = command_queue.commandBuffer() else {
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return;
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};
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let Some(pass_descriptor) = (unsafe { mtk_view.currentRenderPassDescriptor() }) else {
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return;
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};
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2024-02-12 16:43:51 +11:00
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2024-02-12 16:12:08 +11:00
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let Some(encoder) = command_buffer.renderCommandEncoderWithDescriptor(&pass_descriptor)
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else {
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return;
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};
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// compute the scene properties
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let scene_properties_data = &SceneProperties {
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time: unsafe { self.ivars().start_date.timeIntervalSinceNow() } as f32,
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};
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// write the scene properties to the vertex shader argument buffer at index 0
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let scene_properties_bytes = NonNull::from(scene_properties_data);
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unsafe {
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encoder.setVertexBytes_length_atIndex(
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scene_properties_bytes.cast::<core::ffi::c_void>(),
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core::mem::size_of_val(scene_properties_data),
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0,
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)
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};
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// compute the triangle geometry
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let vertex_input_data: &[VertexInput] = &[
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VertexInput {
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position: Position {
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x: -f32::sqrt(3.0) / 4.0,
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y: -0.25,
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z: 0.,
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},
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color: Color {
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r: 1.,
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g: 0.,
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b: 0.,
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},
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},
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VertexInput {
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position: Position {
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x: f32::sqrt(3.0) / 4.0,
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y: -0.25,
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z: 0.,
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},
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color: Color {
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r: 0.,
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g: 1.,
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b: 0.,
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},
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},
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VertexInput {
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position: Position {
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x: 0.,
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y: 0.5,
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z: 0.,
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},
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color: Color {
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r: 0.,
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g: 0.,
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b: 1.,
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},
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},
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];
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// write the triangle geometry to the vertex shader argument buffer at index 1
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let vertex_input_bytes = NonNull::from(vertex_input_data);
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unsafe {
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encoder.setVertexBytes_length_atIndex(
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vertex_input_bytes.cast::<core::ffi::c_void>(),
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core::mem::size_of_val(vertex_input_data),
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1,
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)
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};
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2024-02-12 16:43:51 +11:00
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2024-02-12 16:12:08 +11:00
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// configure the encoder with the pipeline and draw the triangle
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encoder.setRenderPipelineState(pipeline_state);
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unsafe {
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encoder.drawPrimitives_vertexStart_vertexCount(MTLPrimitiveTypeTriangle, 0, 3)
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};
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encoder.endEncoding();
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2024-02-12 16:43:51 +11:00
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unsafe {
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let mut filter_chain = filter_chain.write().unwrap();
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let texture = pass_descriptor
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.colorAttachments()
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.objectAtIndexedSubscript(0)
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.texture()
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.unwrap();
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let tex_desc = MTLTextureDescriptor::texture2DDescriptorWithPixelFormat_width_height_mipmapped(
|
|
|
|
texture.pixelFormat(),
|
|
|
|
texture.width(),
|
|
|
|
texture.height(),
|
|
|
|
false
|
|
|
|
);
|
|
|
|
|
|
|
|
tex_desc.setUsage(MTLTextureUsageRenderTarget);
|
|
|
|
// let frontbuffer = command_queue
|
|
|
|
// .device()
|
|
|
|
// .newTextureWithDescriptor(&tex_desc)
|
|
|
|
// .unwrap();
|
|
|
|
|
|
|
|
let backbuffer = command_queue
|
|
|
|
.device()
|
|
|
|
.newTextureWithDescriptor(&tex_desc)
|
|
|
|
.unwrap();
|
|
|
|
|
|
|
|
// let blit = command_buffer
|
|
|
|
// .blitCommandEncoder()
|
|
|
|
// .unwrap();
|
|
|
|
// blit.copyFromTexture_toTexture(&texture, &frontbuffer);
|
|
|
|
// blit.endEncoding();
|
|
|
|
|
|
|
|
filter_chain.frame(&texture,
|
|
|
|
&Viewport {
|
|
|
|
x: 0.0,
|
|
|
|
y: 0.0,
|
|
|
|
mvp: None,
|
|
|
|
output: &backbuffer
|
|
|
|
}, &command_buffer, 1, None)
|
|
|
|
.expect("frame");
|
|
|
|
|
|
|
|
let blit = command_buffer
|
|
|
|
.blitCommandEncoder()
|
|
|
|
.unwrap();
|
|
|
|
blit.copyFromTexture_toTexture(&backbuffer, &texture);
|
|
|
|
blit.endEncoding();
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2024-02-12 16:12:08 +11:00
|
|
|
// schedule the command buffer for display and commit
|
|
|
|
command_buffer.presentDrawable(¤t_drawable);
|
|
|
|
command_buffer.commit();
|
|
|
|
}
|
|
|
|
|
|
|
|
#[method(mtkView:drawableSizeWillChange:)]
|
|
|
|
#[allow(non_snake_case)]
|
|
|
|
unsafe fn mtkView_drawableSizeWillChange(&self, _view: &MTKView, _size: NSSize) {
|
|
|
|
// println!("mtkView_drawableSizeWillChange");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
);
|
|
|
|
|
|
|
|
impl Delegate {
|
|
|
|
pub fn new(mtm: MainThreadMarker) -> Id<Self> {
|
|
|
|
let this = mtm.alloc();
|
|
|
|
let this = this.set_ivars(Ivars {
|
|
|
|
start_date: unsafe { NSDate::now() },
|
|
|
|
command_queue: OnceCell::default(),
|
|
|
|
pipeline_state: OnceCell::default(),
|
|
|
|
filter_chain: OnceCell::default(),
|
|
|
|
window: OnceCell::default(),
|
|
|
|
});
|
|
|
|
unsafe { msg_send_id![super(this), init] }
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
fn main() {
|
|
|
|
let mtm = MainThreadMarker::new().unwrap();
|
|
|
|
// configure the app
|
|
|
|
let app = NSApplication::sharedApplication(mtm);
|
|
|
|
app.setActivationPolicy(NSApplicationActivationPolicyRegular);
|
|
|
|
|
|
|
|
// configure the application delegate
|
|
|
|
let delegate = Delegate::new(mtm);
|
|
|
|
let object = ProtocolObject::from_ref(&*delegate);
|
|
|
|
app.setDelegate(Some(object));
|
|
|
|
|
|
|
|
// run the app
|
|
|
|
unsafe { app.run() };
|
|
|
|
}
|