diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lib.rs | 2 | ||||
| -rw-r--r-- | src/renderer.rs | 28 | ||||
| -rw-r--r-- | src/vertex.rs | 34 |
3 files changed, 59 insertions, 5 deletions
@@ -6,6 +6,8 @@ pub mod config; pub mod renderer; +mod vertex; pub use config::RenderWindowConfig; pub use renderer::Renderer; +pub(crate) use vertex::Vertex; diff --git a/src/renderer.rs b/src/renderer.rs index 2264ab5..dc8ecb2 100644 --- a/src/renderer.rs +++ b/src/renderer.rs @@ -1,7 +1,9 @@ -use crate::config::RenderWindowConfig; +use std::convert::TryInto; + +use crate::{vertex::SQUARE, RenderWindowConfig, Vertex}; use pollster::FutureExt; use thiserror::Error; -use wgpu::include_wgsl; +use wgpu::{include_wgsl, util::DeviceExt}; use winit::{ dpi::PhysicalSize, error::OsError, @@ -40,6 +42,8 @@ pub struct Renderer { queue: wgpu::Queue, surface_config: wgpu::SurfaceConfiguration, render_pipeline: wgpu::RenderPipeline, + square_vertex_buffer: wgpu::Buffer, + square_vertices: u32, window: Window, } @@ -100,7 +104,7 @@ impl Renderer { None, ) .block_on() - .unwrap(); + .expect("there was no device with the selected features"); // configuration for the surface let surface_config = config.to_surface_configuration( @@ -124,7 +128,7 @@ impl Renderer { vertex: wgpu::VertexState { module: &shader, entry_point: "vs_main", - buffers: &[], + buffers: &[Vertex::desc()], }, // information about the fragment shader fragment: Some(wgpu::FragmentState { @@ -156,12 +160,25 @@ impl Renderer { multiview: None, }); + // the vertex buffer used for rendering squares + let square_vertices = SQUARE + .len() + .try_into() + .expect("expected fewer than 3 billion vertices in a square"); + let square_vertex_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor { + label: Some("Square Vertex Buffer"), + contents: bytemuck::cast_slice(&SQUARE), + usage: wgpu::BufferUsages::VERTEX, + }); + Ok(Self { surface, device, queue, surface_config, render_pipeline, + square_vertex_buffer, + square_vertices, window, }) } @@ -214,7 +231,8 @@ impl Renderer { }); render_pass.set_pipeline(&self.render_pipeline); - render_pass.draw(0..4, 0..1); + render_pass.set_vertex_buffer(0, self.square_vertex_buffer.slice(..)); + render_pass.draw(0..self.square_vertices, 0..1); } // the encoder can't finish building the command buffer until the // render pass is dropped diff --git a/src/vertex.rs b/src/vertex.rs new file mode 100644 index 0000000..7735801 --- /dev/null +++ b/src/vertex.rs @@ -0,0 +1,34 @@ +use std::mem::size_of; + +use bytemuck::{Pod, Zeroable}; + +pub const SQUARE: [Vertex; 4] = [ + Vertex::new(-0.5, -0.5), + Vertex::new(0.5, -0.5), + Vertex::new(-0.5, 0.5), + Vertex::new(0.5, 0.5), +]; + +#[repr(C)] +#[derive(Copy, Clone, Debug, PartialEq, Pod, Zeroable)] +pub struct Vertex { + position: [f32; 2], +} + +impl Vertex { + const fn new(x: f32, y: f32) -> Self { + Self { position: [x, y] } + } +} + +impl Vertex { + const ATTRIBUTES: [wgpu::VertexAttribute; 1] = wgpu::vertex_attr_array![0 => Float32x2]; + + pub(crate) const fn desc<'a>() -> wgpu::VertexBufferLayout<'a> { + wgpu::VertexBufferLayout { + array_stride: size_of::<Self>() as wgpu::BufferAddress, + step_mode: wgpu::VertexStepMode::Vertex, + attributes: &Self::ATTRIBUTES, + } + } +} |