Basic triangle

.cargo/config.toml

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+[build]
+target-dir = "Binaries"

.gitignore

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+Binaries/
+Cargo.lock

Cargo.toml

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+[package]
+name = "renderer"
+version = "0.0.1"
+description = "WGPU Renderer"
+repository = "https://github.com/GuilhermeWerner/Renderer"
+license = "MIT"
+edition = "2021"
+publish = false
+
+[[bin]]
+name = "Renderer"
+path = "Source/Main.rs"
+doc = false
+
+[dependencies]
+bytemuck = { version = "1.4", features = [ "derive" ] }
+cgmath = "0.18"
+env_logger = "0.9"
+image = "0.23"
+log = "0.4"
+pollster = "0.2"
+wgpu = "0.11"
+winit = "0.25"

Shaders/Main.wgsl

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+// Vertex shader
+
+struct VertexInput {
+    [[location(0)]] position: vec3<f32>;
+    [[location(1)]] color: vec3<f32>;
+};
+
+struct VertexOutput {
+    [[builtin(position)]] clip_position: vec4<f32>;
+    [[location(0)]] color: vec3<f32>;
+};
+
+[[stage(vertex)]]
+fn main(
+    model: VertexInput,
+) -> VertexOutput {
+    var out: VertexOutput;
+    out.color = model.color;
+    out.clip_position = vec4<f32>(model.position, 1.0);
+    return out;
+}
+
+// Fragment shader
+
+[[stage(fragment)]]
+fn main(in: VertexOutput) -> [[location(0)]] vec4<f32> {
+    return vec4<f32>(in.color, 1.0);
+}

Source/Main.rs

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+// Copyright (c) TribuFu. All Rights Reserved.
+
+#![allow(non_snake_case)]
+
+use bytemuck::{Pod, Zeroable};
+use wgpu::util::DeviceExt;
+use winit::dpi::LogicalSize;
+use winit::event::*;
+use winit::event_loop::{ControlFlow, EventLoop};
+use winit::window::Window;
+use winit::window::WindowBuilder;
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug, Pod, Zeroable)]
+struct Vertex {
+    position: [f32; 3],
+    color: [f32; 3],
+}
+
+impl Vertex {
+    fn desc<'a>() -> wgpu::VertexBufferLayout<'a> {
+        wgpu::VertexBufferLayout {
+            array_stride: std::mem::size_of::<Vertex>() as wgpu::BufferAddress,
+            step_mode: wgpu::VertexStepMode::Vertex,
+            attributes: &[
+                wgpu::VertexAttribute {
+                    offset: 0,
+                    shader_location: 0,
+                    format: wgpu::VertexFormat::Float32x3,
+                },
+                wgpu::VertexAttribute {
+                    offset: std::mem::size_of::<[f32; 3]>() as wgpu::BufferAddress,
+                    shader_location: 1,
+                    format: wgpu::VertexFormat::Float32x3,
+                },
+            ],
+        }
+    }
+}
+
+#[rustfmt::skip]
+const VERTICES: &[Vertex] = &[
+    Vertex { position: [0.0, 0.5, 0.0], color: [1.0, 0.0, 0.0] },
+    Vertex { position: [-0.5, -0.5, 0.0], color: [0.0, 1.0, 0.0] },
+    Vertex { position: [0.5, -0.5, 0.0], color: [0.0, 0.0, 1.0] },
+];
+
+struct State {
+    surface: wgpu::Surface,
+    device: wgpu::Device,
+    queue: wgpu::Queue,
+    config: wgpu::SurfaceConfiguration,
+    size: winit::dpi::PhysicalSize<u32>,
+    render_pipeline: wgpu::RenderPipeline,
+    vertex_buffer: wgpu::Buffer,
+    num_vertices: u32,
+}
+
+impl State {
+    async fn new(window: &Window) -> Self {
+        let size = window.inner_size();
+
+        // The instance is a handle to our GPU
+        // Backends::all => Vulkan + Metal + DX12 + Browser WebGPU
+        let instance = wgpu::Instance::new(wgpu::Backends::all());
+
+        let surface = unsafe { instance.create_surface(window) };
+
+        let adapter = instance
+            .request_adapter(&wgpu::RequestAdapterOptions {
+                power_preference: wgpu::PowerPreference::HighPerformance,
+                compatible_surface: Some(&surface),
+                force_fallback_adapter: false,
+            })
+            .await
+            .unwrap();
+
+        let (device, queue) = adapter
+            .request_device(
+                &wgpu::DeviceDescriptor {
+                    features: wgpu::Features::empty(),
+                    limits: wgpu::Limits::default(),
+                    label: None,
+                },
+                None, // Trace path
+            )
+            .await
+            .unwrap();
+
+        let config = wgpu::SurfaceConfiguration {
+            usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
+            format: surface.get_preferred_format(&adapter).unwrap(),
+            width: size.width,
+            height: size.height,
+            present_mode: wgpu::PresentMode::Fifo,
+        };
+
+        surface.configure(&device, &config);
+
+        let shader = device.create_shader_module(&wgpu::ShaderModuleDescriptor {
+            label: Some("Shader"),
+            source: wgpu::ShaderSource::Wgsl(include_str!("../Shaders/Main.wgsl").into()),
+        });
+
+        let render_pipeline_layout =
+            device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
+                label: Some("Render Pipeline Layout"),
+                bind_group_layouts: &[],
+                push_constant_ranges: &[],
+            });
+
+        let render_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
+            label: Some("Render Pipeline"),
+            layout: Some(&render_pipeline_layout),
+            vertex: wgpu::VertexState {
+                module: &shader,
+                entry_point: "main",
+                buffers: &[Vertex::desc()],
+            },
+            fragment: Some(wgpu::FragmentState {
+                // 3.
+                module: &shader,
+                entry_point: "main",
+                targets: &[wgpu::ColorTargetState {
+                    // 4.
+                    format: config.format,
+                    blend: Some(wgpu::BlendState::REPLACE),
+                    write_mask: wgpu::ColorWrites::ALL,
+                }],
+            }),
+            primitive: wgpu::PrimitiveState {
+                topology: wgpu::PrimitiveTopology::TriangleList, // 1.
+                strip_index_format: None,
+                front_face: wgpu::FrontFace::Ccw, // 2.
+                cull_mode: Some(wgpu::Face::Back),
+                // Setting this to anything other than Fill requires Features::NON_FILL_POLYGON_MODE
+                polygon_mode: wgpu::PolygonMode::Fill,
+                // Requires Features::DEPTH_CLAMPING
+                clamp_depth: false,
+                // Requires Features::CONSERVATIVE_RASTERIZATION
+                conservative: false,
+            },
+            depth_stencil: None, // 1.
+            multisample: wgpu::MultisampleState {
+                count: 1,                         // 2.
+                mask: !0,                         // 3.
+                alpha_to_coverage_enabled: false, // 4.
+            },
+        });
+
+        let vertex_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+            label: Some("Vertex Buffer"),
+            contents: bytemuck::cast_slice(VERTICES),
+            usage: wgpu::BufferUsages::VERTEX,
+        });
+
+        let num_vertices = VERTICES.len() as u32;
+
+        Self {
+            surface,
+            device,
+            queue,
+            config,
+            size,
+            render_pipeline,
+            vertex_buffer,
+            num_vertices,
+        }
+    }
+
+    pub fn resize(&mut self, new_size: winit::dpi::PhysicalSize<u32>) {
+        if new_size.width > 0 && new_size.height > 0 {
+            self.size = new_size;
+            self.config.width = new_size.width;
+            self.config.height = new_size.height;
+            self.surface.configure(&self.device, &self.config);
+        }
+    }
+
+    fn input(&mut self, event: &WindowEvent) -> bool {
+        false
+    }
+
+    fn update(&mut self) {}
+
+    fn render(&mut self) -> Result<(), wgpu::SurfaceError> {
+        let output = self.surface.get_current_texture()?;
+        let view = output
+            .texture
+            .create_view(&wgpu::TextureViewDescriptor::default());
+
+        let mut encoder = self
+            .device
+            .create_command_encoder(&wgpu::CommandEncoderDescriptor {
+                label: Some("Render Encoder"),
+            });
+
+        {
+            let mut render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
+                label: Some("Render Pass"),
+                color_attachments: &[
+                    // This is what [[location(0)]] in the fragment shader targets
+                    wgpu::RenderPassColorAttachment {
+                        view: &view,
+                        resolve_target: None,
+                        ops: wgpu::Operations {
+                            load: wgpu::LoadOp::Clear(wgpu::Color {
+                                r: 0.0,
+                                g: 0.0,
+                                b: 0.0,
+                                a: 1.0,
+                            }),
+                            store: true,
+                        },
+                    },
+                ],
+                depth_stencil_attachment: None,
+            });
+
+            render_pass.set_pipeline(&self.render_pipeline);
+            render_pass.set_vertex_buffer(0, self.vertex_buffer.slice(..));
+
+            render_pass.draw(0..self.num_vertices, 0..1);
+        }
+
+        // submit will accept anything that implements IntoIter
+        self.queue.submit(std::iter::once(encoder.finish()));
+        output.present();
+
+        Ok(())
+    }
+}
+
+fn main() {
+    env_logger::init();
+
+    let event_loop = EventLoop::new();
+
+    let window = WindowBuilder::new()
+        .with_title("Renderer")
+        .with_inner_size(LogicalSize::new(1280, 720))
+        .build(&event_loop)
+        .unwrap();
+
+    // State::new uses async code, so we're going to wait for it to finish
+    let mut state = pollster::block_on(State::new(&window));
+
+    event_loop.run(move |event, _, control_flow| {
+        match event {
+            Event::WindowEvent {
+                ref event,
+                window_id,
+            } if window_id == window.id() => {
+                if !state.input(event) {
+                    match event {
+                        WindowEvent::CloseRequested
+                        | WindowEvent::KeyboardInput {
+                            input:
+                                KeyboardInput {
+                                    state: ElementState::Pressed,
+                                    virtual_keycode: Some(VirtualKeyCode::Escape),
+                                    ..
+                                },
+                            ..
+                        } => *control_flow = ControlFlow::Exit,
+                        WindowEvent::Resized(physical_size) => {
+                            state.resize(*physical_size);
+                        }
+                        WindowEvent::ScaleFactorChanged { new_inner_size, .. } => {
+                            state.resize(**new_inner_size);
+                        }
+                        _ => {}
+                    }
+                }
+            }
+            Event::RedrawRequested(_) => {
+                state.update();
+                match state.render() {
+                    Ok(_) => {}
+                    // Reconfigure the surface if lost
+                    Err(wgpu::SurfaceError::Lost) => state.resize(state.size),
+                    // The system is out of memory, we should probably quit
+                    Err(wgpu::SurfaceError::OutOfMemory) => *control_flow = ControlFlow::Exit,
+                    // All other errors (Outdated, Timeout) should be resolved by the next frame
+                    Err(e) => eprintln!("{:?}", e),
+                }
+            }
+            Event::MainEventsCleared => {
+                // RedrawRequested will only trigger once, unless we manually
+                // request it.
+                window.request_redraw();
+            }
+            _ => {}
+        }
+    });
+}