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|
use anyhow::{Result, anyhow};
use pollster::FutureExt;
use wgpu::{
Backends, BindGroup, BindGroupDescriptor, BindGroupLayoutDescriptor, BlendState, Color,
ColorTargetState, ColorWrites, CommandEncoderDescriptor, Device, DeviceDescriptor, Features,
FragmentState, FrontFace, Instance, InstanceDescriptor, Limits, LoadOp, MaintainBase,
MultisampleState, Operations, PipelineCompilationOptions, PipelineLayoutDescriptor,
PolygonMode, PowerPreference, PrimitiveState, PrimitiveTopology, Queue,
RenderPassColorAttachment, RenderPassDescriptor, RenderPipeline, RenderPipelineDescriptor,
RequestAdapterOptions, StoreOp, Surface, SurfaceConfiguration, TextureViewDescriptor,
VertexState, include_wgsl,
};
use winit::window::Window;
pub struct Renderer<'a> {
surface: Surface<'a>,
pipeline: RenderPipeline,
bind_group: BindGroup,
queue: Queue,
device: Device,
surface_configuration: SurfaceConfiguration,
}
impl<'a> Renderer<'a> {
pub fn new(window: &'a Window) -> Result<Self> {
let instance = Instance::new(InstanceDescriptor {
backends: Backends::all(),
..Default::default()
});
let surface = instance.create_surface(window)?;
let adapter = instance
.request_adapter(&RequestAdapterOptions {
compatible_surface: Some(&surface),
power_preference: PowerPreference::HighPerformance,
..Default::default()
})
.block_on()
.ok_or(anyhow!("no adapter found"))?;
let (device, queue) = adapter
.request_device(
&DeviceDescriptor {
required_features: Features::default(),
required_limits: Limits::downlevel_defaults(),
..Default::default()
},
None,
)
.block_on()?;
let surface_configuration = surface
.get_default_config(&adapter, 256, 256)
.ok_or(anyhow!("no default config"))?;
let module = device.create_shader_module(include_wgsl!("shader.wgsl"));
let bind_group_layout = device.create_bind_group_layout(&BindGroupLayoutDescriptor {
entries: &[],
label: None,
});
let bind_group = device.create_bind_group(&BindGroupDescriptor {
label: None,
layout: &bind_group_layout,
entries: &[],
});
let pipeline_layout = device.create_pipeline_layout(&PipelineLayoutDescriptor {
label: None,
bind_group_layouts: &[&bind_group_layout],
push_constant_ranges: &[],
});
let pipeline = device.create_render_pipeline(&RenderPipelineDescriptor {
label: None,
layout: Some(&pipeline_layout),
fragment: Some(FragmentState {
module: &module,
entry_point: Some("fs_main"),
targets: &[Some(ColorTargetState {
blend: Some(BlendState::PREMULTIPLIED_ALPHA_BLENDING),
format: surface_configuration.format,
write_mask: ColorWrites::all(),
})],
compilation_options: PipelineCompilationOptions::default(),
}),
vertex: VertexState {
module: &module,
entry_point: Some("vs_main"),
buffers: &[],
compilation_options: PipelineCompilationOptions::default(),
},
primitive: PrimitiveState {
topology: PrimitiveTopology::TriangleList,
front_face: FrontFace::Ccw,
cull_mode: None, //Some(Face::Back),
polygon_mode: PolygonMode::Fill,
..Default::default()
},
depth_stencil: Default::default(),
multisample: MultisampleState::default(),
multiview: None,
cache: None,
});
surface.configure(&device, &surface_configuration);
Ok(Self {
surface,
pipeline,
bind_group,
device,
queue,
surface_configuration,
})
}
pub fn resize(&mut self, width: u32, height: u32) {
self.surface_configuration.width = width;
self.surface_configuration.height = height;
self.surface
.configure(&self.device, &self.surface_configuration);
}
pub fn draw(&mut self) -> Result<()> {
let target = self.surface.get_current_texture()?;
let target_view = target
.texture
.create_view(&TextureViewDescriptor::default());
let mut commands = self
.device
.create_command_encoder(&CommandEncoderDescriptor { label: None });
{
let mut rpass = commands.begin_render_pass(&RenderPassDescriptor {
label: None,
color_attachments: &[Some(RenderPassColorAttachment {
view: &target_view,
resolve_target: None,
ops: Operations {
store: StoreOp::Store,
load: LoadOp::Clear(Color::BLUE),
},
})],
..Default::default()
});
rpass.set_bind_group(0, &self.bind_group, &[]);
rpass.set_pipeline(&self.pipeline);
rpass.draw(0..3, 0..1);
}
let i = self.queue.submit(Some(commands.finish()));
self.device.poll(MaintainBase::WaitForSubmissionIndex(i));
target.present();
Ok(())
}
}
|
