use crate::gpu::effect::{EffectCache, EffectPipeline};
use crate::gpu::veil::{ParamDef, ParamValue, Veil, VeilRegistration};
use std::sync::Arc;
const PARAMS: &[ParamDef] = &[
ParamDef::Float {
name: "radius",
min: 0.0,
max: 1.0,
default: 1.0 / 3.0,
},
ParamDef::Float {
name: "threshold",
min: 0.01,
max: 1.0,
default: 0.1,
},
];
pub fn register() -> VeilRegistration {
VeilRegistration {
type_id: "lens_blur",
display_name: "Lens Blur",
params: PARAMS,
create_pipeline: create_lens_blur_pipeline,
from_params: |params, shared| {
let radius = match params.first() {
Some(ParamValue::Float(v)) => *v,
_ => 1.0 / 3.0,
};
let threshold = match params.get(1) {
Some(ParamValue::Float(v)) => *v,
_ => 0.1,
};
Box::new(LensBlur::new(radius, threshold, shared))
},
}
}
#[repr(C)]
#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
struct LensBlurUniforms {
radius: f32,
threshold: f32,
resolution_x: f32,
resolution_y: f32,
}
#[derive(Clone, Debug)]
pub struct LensBlur {
pub radius: f32,
pub threshold: f32,
shared: Arc<EffectPipeline>,
}
impl LensBlur {
pub fn new(radius: f32, threshold: f32, shared: Arc<EffectPipeline>) -> Self {
LensBlur {
radius: radius.max(0.0),
threshold: threshold.max(0.01),
shared,
}
}
}
impl Veil for LensBlur {
fn type_id(&self) -> &'static str {
"lens_blur"
}
fn clone_boxed(&self) -> Box<dyn Veil> {
Box::new(self.clone())
}
fn param_values(&self) -> Vec<ParamValue> {
vec![
ParamValue::Float(self.radius),
ParamValue::Float(self.threshold),
]
}
fn create_cache(
&self,
device: &wgpu::Device,
queue: &wgpu::Queue,
ping_pong_views: &[wgpu::TextureView; 2],
sampler: &wgpu::Sampler,
render_width: u32,
render_height: u32,
) -> EffectCache {
let uniforms = LensBlurUniforms {
radius: self.radius,
threshold: self.threshold,
resolution_x: render_width as f32,
resolution_y: render_height as f32,
};
let uniform_buf = device.create_buffer(&wgpu::BufferDescriptor {
label: Some("lens-blur-uniforms"),
size: std::mem::size_of::<LensBlurUniforms>() as u64,
usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
mapped_at_creation: false,
});
queue.write_buffer(&uniform_buf, 0, bytemuck::bytes_of(&uniforms));
let layout = &self.shared.bind_group_layout;
let bind_groups: [wgpu::BindGroup; 2] = std::array::from_fn(|i| {
device.create_bind_group(&wgpu::BindGroupDescriptor {
label: Some(&format!("lens-blur-bg-{i}")),
layout,
entries: &[
wgpu::BindGroupEntry {
binding: 0,
resource: wgpu::BindingResource::TextureView(&ping_pong_views[i]),
},
wgpu::BindGroupEntry {
binding: 1,
resource: wgpu::BindingResource::Sampler(sampler),
},
wgpu::BindGroupEntry {
binding: 2,
resource: uniform_buf.as_entire_binding(),
},
],
})
});
EffectCache {
uniform_bufs: vec![uniform_buf],
bind_groups: vec![bind_groups],
aux_textures: vec![],
aux_views: vec![],
aux_pipelines: vec![],
}
}
fn encode(
&self,
encoder: &mut wgpu::CommandEncoder,
cache: &EffectCache,
src_idx: usize,
dst_view: &wgpu::TextureView,
) {
let mut rpass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
label: Some("lens-blur"),
color_attachments: &[Some(wgpu::RenderPassColorAttachment {
view: dst_view,
resolve_target: None,
depth_slice: None,
ops: wgpu::Operations {
load: wgpu::LoadOp::Clear(wgpu::Color::BLACK),
store: wgpu::StoreOp::Store,
},
})],
..Default::default()
});
rpass.set_pipeline(&self.shared.pipeline);
rpass.set_bind_group(0, &cache.bind_groups[0][src_idx], &[]);
rpass.draw(0..3, 0..1);
}
}
fn create_lens_blur_pipeline(
device: &wgpu::Device,
_format: wgpu::TextureFormat,
) -> EffectPipeline {
let bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
label: Some("lens-blur-bgl"),
entries: &[
wgpu::BindGroupLayoutEntry {
binding: 0,
visibility: wgpu::ShaderStages::FRAGMENT,
ty: wgpu::BindingType::Texture {
sample_type: wgpu::TextureSampleType::Float { filterable: true },
view_dimension: wgpu::TextureViewDimension::D2,
multisampled: false,
},
count: None,
},
wgpu::BindGroupLayoutEntry {
binding: 1,
visibility: wgpu::ShaderStages::FRAGMENT,
ty: wgpu::BindingType::Sampler(wgpu::SamplerBindingType::Filtering),
count: None,
},
wgpu::BindGroupLayoutEntry {
binding: 2,
visibility: wgpu::ShaderStages::FRAGMENT,
ty: wgpu::BindingType::Buffer {
ty: wgpu::BufferBindingType::Uniform,
has_dynamic_offset: false,
min_binding_size: None,
},
count: None,
},
],
});
let pipeline_layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
label: Some("lens-blur-pipeline-layout"),
bind_group_layouts: &[Some(&bind_group_layout)],
immediate_size: 0,
});
let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
label: Some("lens-blur-shader"),
source: wgpu::ShaderSource::Wgsl(
include_str!("../../../shaders/veils/lens_blur.wgsl").into(),
),
});
let pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
label: Some("lens-blur-pipeline"),
layout: Some(&pipeline_layout),
vertex: wgpu::VertexState {
module: &shader,
entry_point: Some("vs_main"),
buffers: &[],
compilation_options: Default::default(),
},
fragment: Some(wgpu::FragmentState {
module: &shader,
entry_point: Some("fs_lens_blur"),
targets: &[Some(wgpu::ColorTargetState {
format: wgpu::TextureFormat::Rgba8Unorm,
blend: None,
write_mask: wgpu::ColorWrites::ALL,
})],
compilation_options: Default::default(),
}),
primitive: wgpu::PrimitiveState {
topology: wgpu::PrimitiveTopology::TriangleList,
..Default::default()
},
depth_stencil: None,
multisample: wgpu::MultisampleState::default(),
multiview_mask: None,
cache: None,
});
EffectPipeline {
pipeline,
bind_group_layout,
}
}