wisp/render/
triangle_pipeline.rs

1//! Hardcoded triangle pipeline — M0.5 hello-triangle.
2//!
3//! Retained as a smoke-test path even after M0.6+ adds proper sprite/quad
4//! pipelines, so the renderer always has a known-good draw call available.
5
6use crate::application::Application;
7
8/// Render pipeline that draws a hardcoded NDC triangle with RGB vertices.
9pub(crate) struct TrianglePipeline {
10    pipeline: wgpu::RenderPipeline,
11}
12
13impl TrianglePipeline {
14    pub(crate) fn new(app: &Application, output_format: wgpu::TextureFormat) -> Self {
15        let device = app.device();
16        let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
17            label: Some("wisp::triangle"),
18            source: wgpu::ShaderSource::Wgsl(include_str!("../../shaders/triangle.wgsl").into()),
19        });
20
21        let layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
22            label: Some("wisp::triangle layout"),
23            bind_group_layouts: &[],
24            push_constant_ranges: &[],
25        });
26
27        let pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
28            label: Some("wisp::triangle pipeline"),
29            layout: Some(&layout),
30            vertex: wgpu::VertexState {
31                module: &shader,
32                entry_point: Some("main_vs"),
33                buffers: &[],
34                compilation_options: wgpu::PipelineCompilationOptions::default(),
35            },
36            fragment: Some(wgpu::FragmentState {
37                module: &shader,
38                entry_point: Some("main_fs"),
39                targets: &[Some(wgpu::ColorTargetState {
40                    format: output_format,
41                    blend: Some(wgpu::BlendState::ALPHA_BLENDING),
42                    write_mask: wgpu::ColorWrites::ALL,
43                })],
44                compilation_options: wgpu::PipelineCompilationOptions::default(),
45            }),
46            primitive: wgpu::PrimitiveState::default(),
47            depth_stencil: None,
48            multisample: wgpu::MultisampleState::default(),
49            multiview: None,
50            cache: None,
51        });
52
53        Self { pipeline }
54    }
55
56    pub(crate) fn draw(&self, pass: &mut wgpu::RenderPass<'_>) {
57        pass.set_pipeline(&self.pipeline);
58        pass.draw(0..3, 0..1);
59    }
60}
wisp/render/triangle_pipeline.rs

wisp/render/
triangle_pipeline.rs
