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use std::collections::HashMap;
use crate::{GPU_TEXTURE_FORMAT, GpuError};
const FULLSCREEN_SHADER_SOURCE: &str = include_str!("shaders/fullscreen.wgsl");
const GAUSSIAN_BLUR_SHADER_SOURCE: &str = include_str!("shaders/gaussian_blur.wgsl");
const BLIT_SHADER_SOURCE: &str = include_str!("shaders/blit.wgsl");
pub const GAUSSIAN_BLUR_SHADER_ID: &str = "gaussian-blur";
pub struct ShaderRegistry {
effect_texture_bind_group_layout: wgpu::BindGroupLayout,
effect_uniform_bind_group_layout: wgpu::BindGroupLayout,
effect_pipelines: HashMap<String, wgpu::RenderPipeline>,
blit_pipeline: wgpu::RenderPipeline,
}
impl ShaderRegistry {
pub fn new(device: &wgpu::Device) -> Self {
let effect_texture_bind_group_layout =
device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
label: Some("gpu-effect-texture-bind-group-layout"),
entries: &[
wgpu::BindGroupLayoutEntry {
binding: 0,
visibility: wgpu::ShaderStages::FRAGMENT,
ty: wgpu::BindingType::Texture {
multisampled: false,
view_dimension: wgpu::TextureViewDimension::D2,
sample_type: wgpu::TextureSampleType::Float { filterable: true },
},
count: None,
},
wgpu::BindGroupLayoutEntry {
binding: 1,
visibility: wgpu::ShaderStages::FRAGMENT,
ty: wgpu::BindingType::Sampler(wgpu::SamplerBindingType::Filtering),
count: None,
},
],
});
let effect_uniform_bind_group_layout =
device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
label: Some("gpu-effect-uniform-bind-group-layout"),
entries: &[wgpu::BindGroupLayoutEntry {
binding: 0,
visibility: wgpu::ShaderStages::FRAGMENT,
ty: wgpu::BindingType::Buffer {
ty: wgpu::BufferBindingType::Uniform,
has_dynamic_offset: false,
min_binding_size: None,
},
count: None,
}],
});
let vertex_shader_module = device.create_shader_module(wgpu::ShaderModuleDescriptor {
label: Some("gpu-fullscreen-shader"),
source: wgpu::ShaderSource::Wgsl(FULLSCREEN_SHADER_SOURCE.into()),
});
let gaussian_blur_shader_module =
device.create_shader_module(wgpu::ShaderModuleDescriptor {
label: Some("gpu-gaussian-blur-shader"),
source: wgpu::ShaderSource::Wgsl(GAUSSIAN_BLUR_SHADER_SOURCE.into()),
});
let blit_shader_module = device.create_shader_module(wgpu::ShaderModuleDescriptor {
label: Some("gpu-blit-shader"),
source: wgpu::ShaderSource::Wgsl(BLIT_SHADER_SOURCE.into()),
});
let pipeline_layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
label: Some("gpu-effect-pipeline-layout"),
bind_group_layouts: &[
Some(&effect_texture_bind_group_layout),
Some(&effect_uniform_bind_group_layout),
],
immediate_size: 0,
});
let blit_pipeline_layout =
device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
label: Some("gpu-blit-pipeline-layout"),
bind_group_layouts: &[Some(&effect_texture_bind_group_layout)],
immediate_size: 0,
});
let gaussian_blur_pipeline =
device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
label: Some("gpu-gaussian-blur-pipeline"),
layout: Some(&pipeline_layout),
vertex: wgpu::VertexState {
module: &vertex_shader_module,
entry_point: Some("vertex_main"),
buffers: &[wgpu::VertexBufferLayout {
array_stride: std::mem::size_of::<[f32; 2]>() as u64,
step_mode: wgpu::VertexStepMode::Vertex,
attributes: &[wgpu::VertexAttribute {
format: wgpu::VertexFormat::Float32x2,
offset: 0,
shader_location: 0,
}],
}],
compilation_options: wgpu::PipelineCompilationOptions::default(),
},
fragment: Some(wgpu::FragmentState {
module: &gaussian_blur_shader_module,
entry_point: Some("fragment_main"),
targets: &[Some(wgpu::ColorTargetState {
format: GPU_TEXTURE_FORMAT,
blend: None,
write_mask: wgpu::ColorWrites::ALL,
})],
compilation_options: wgpu::PipelineCompilationOptions::default(),
}),
primitive: wgpu::PrimitiveState::default(),
depth_stencil: None,
multisample: wgpu::MultisampleState::default(),
multiview_mask: None,
cache: None,
});
let blit_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
label: Some("gpu-blit-pipeline"),
layout: Some(&blit_pipeline_layout),
vertex: wgpu::VertexState {
module: &vertex_shader_module,
entry_point: Some("vertex_main"),
buffers: &[wgpu::VertexBufferLayout {
array_stride: std::mem::size_of::<[f32; 2]>() as u64,
step_mode: wgpu::VertexStepMode::Vertex,
attributes: &[wgpu::VertexAttribute {
format: wgpu::VertexFormat::Float32x2,
offset: 0,
shader_location: 0,
}],
}],
compilation_options: wgpu::PipelineCompilationOptions::default(),
},
fragment: Some(wgpu::FragmentState {
module: &blit_shader_module,
entry_point: Some("fragment_main"),
targets: &[Some(wgpu::ColorTargetState {
format: GPU_TEXTURE_FORMAT,
blend: None,
write_mask: wgpu::ColorWrites::ALL,
})],
compilation_options: wgpu::PipelineCompilationOptions::default(),
}),
primitive: wgpu::PrimitiveState::default(),
depth_stencil: None,
multisample: wgpu::MultisampleState::default(),
multiview_mask: None,
cache: None,
});
let effect_pipelines = HashMap::from([(
GAUSSIAN_BLUR_SHADER_ID.to_string(),
gaussian_blur_pipeline,
)]);
Self {
effect_texture_bind_group_layout,
effect_uniform_bind_group_layout,
effect_pipelines,
blit_pipeline,
}
}
pub fn get_effect_pipeline(&self, shader: &str) -> Result<&wgpu::RenderPipeline, GpuError> {
self.effect_pipelines
.get(shader)
.ok_or_else(|| GpuError::UnknownEffectShader {
shader: shader.to_string(),
})
}
pub fn effect_texture_bind_group_layout(&self) -> &wgpu::BindGroupLayout {
&self.effect_texture_bind_group_layout
}
pub fn effect_uniform_bind_group_layout(&self) -> &wgpu::BindGroupLayout {
&self.effect_uniform_bind_group_layout
}
pub fn blit_pipeline(&self) -> &wgpu::RenderPipeline {
&self.blit_pipeline
}
}
|
