119 lines
3.1 KiB
Rust
119 lines
3.1 KiB
Rust
use std::{
|
|
fs,
|
|
mem::{offset_of, size_of},
|
|
};
|
|
|
|
use bytemuck::{bytes_of, Pod, Zeroable};
|
|
use glam::{Vec2, Vec3};
|
|
|
|
#[derive(Debug, Clone, Copy, Pod, Zeroable)]
|
|
#[repr(C)]
|
|
pub struct Params {
|
|
pub seed: u32,
|
|
pub layers: u32,
|
|
pub roughness: f32,
|
|
pub scale: f32,
|
|
}
|
|
|
|
#[derive(Debug, Clone, Copy, Pod, Zeroable)]
|
|
#[repr(C)]
|
|
pub struct Vertex {
|
|
pub world: Vec3,
|
|
pub screen: Vec2,
|
|
}
|
|
|
|
pub struct Pipeline {
|
|
view_buf: wgpu::Buffer,
|
|
params_buf: wgpu::Buffer,
|
|
pipeline: wgpu::RenderPipeline,
|
|
}
|
|
|
|
impl Pipeline {
|
|
pub fn new(device: &wgpu::Device) -> Self {
|
|
let view_buf = device.create_buffer(&wgpu::BufferDescriptor {
|
|
label: None,
|
|
size: (4 * size_of::<Vertex>()) as u64,
|
|
usage: wgpu::BufferUsages::VERTEX | wgpu::BufferUsages::COPY_DST,
|
|
mapped_at_creation: false,
|
|
});
|
|
let params_buf = device.create_buffer(&wgpu::BufferDescriptor {
|
|
label: None,
|
|
size: size_of::<Params>() as u64,
|
|
usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
|
|
mapped_at_creation: false,
|
|
});
|
|
|
|
let shader = fs::read_to_string("src/bin/envmap/perlin.wgsl").unwrap();
|
|
let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
|
|
label: None,
|
|
source: wgpu::ShaderSource::Wgsl(shader.into()),
|
|
});
|
|
let pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
|
|
label: None,
|
|
layout: None,
|
|
vertex: wgpu::VertexState {
|
|
module: &shader,
|
|
entry_point: None,
|
|
compilation_options: wgpu::PipelineCompilationOptions::default(),
|
|
buffers: &[wgpu::VertexBufferLayout {
|
|
array_stride: size_of::<Vertex>() as u64,
|
|
step_mode: wgpu::VertexStepMode::Vertex,
|
|
attributes: &[
|
|
wgpu::VertexAttribute {
|
|
shader_location: 0,
|
|
offset: offset_of!(Vertex, screen) as u64,
|
|
format: wgpu::VertexFormat::Float32x2,
|
|
},
|
|
wgpu::VertexAttribute {
|
|
shader_location: 1,
|
|
offset: offset_of!(Vertex, world) as u64,
|
|
format: wgpu::VertexFormat::Float32x3,
|
|
},
|
|
],
|
|
}],
|
|
},
|
|
primitive: wgpu::PrimitiveState {
|
|
topology: wgpu::PrimitiveTopology::TriangleStrip,
|
|
..Default::default()
|
|
},
|
|
depth_stencil: None,
|
|
multisample: wgpu::MultisampleState {
|
|
count: 1,
|
|
mask: !0,
|
|
alpha_to_coverage_enabled: false,
|
|
},
|
|
fragment: Some(wgpu::FragmentState {
|
|
module: &shader,
|
|
entry_point: None,
|
|
compilation_options: wgpu::PipelineCompilationOptions::default(),
|
|
targets: &[Some(wgpu::ColorTargetState {
|
|
format: wgpu::TextureFormat::Bgra8UnormSrgb,
|
|
blend: Some(wgpu::BlendState::REPLACE),
|
|
write_mask: wgpu::ColorWrites::ALL,
|
|
})],
|
|
}),
|
|
multiview: None,
|
|
cache: None,
|
|
});
|
|
Self {
|
|
view_buf,
|
|
params_buf,
|
|
pipeline,
|
|
}
|
|
}
|
|
|
|
pub fn set_params(&mut self, queue: &wgpu::Queue, params: Params) {
|
|
queue.write_buffer(&self.params_buf, 0, bytes_of(¶ms));
|
|
}
|
|
|
|
pub fn set_view(&mut self, queue: &wgpu::Queue, vertices: &[Vertex; 4]) {
|
|
queue.write_buffer(&self.view_buf, 0, bytes_of(vertices));
|
|
}
|
|
|
|
pub fn render(&self, pass: &mut wgpu::RenderPass) {
|
|
pass.set_pipeline(&self.pipeline);
|
|
pass.set_vertex_buffer(0, self.view_buf.slice(..));
|
|
pass.draw(0..4, 0..1);
|
|
}
|
|
}
|