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|
use crate::wgpuctx::WgpuCtx;
pub struct RenderPipelineBuilder<'a>
{
bind_groups: Vec<&'a wgpu::BindGroupLayout>,
shader: &'a wgpu::ShaderModule,
vertex_entry_point: Option<&'static str>,
fragment_entry_point: Option<&'static str>,
vertex_comp_options: Option<wgpu::PipelineCompilationOptions<'a>>,
fragment_comp_options: Option<wgpu::PipelineCompilationOptions<'a>>,
vertex_buffer_layouts: Vec<wgpu::VertexBufferLayout<'a>>,
cull_mode: Option<wgpu::Face>,
primitive_topology: wgpu::PrimitiveTopology
}
impl<'a> RenderPipelineBuilder<'a>
{
pub fn new(
shader: &'a wgpu::ShaderModule)
-> Self {
Self {
bind_groups: Vec::new(),
shader: shader,
vertex_entry_point: Some("vs_main"),
fragment_entry_point: Some("fs_main"),
vertex_comp_options: None,
fragment_comp_options: None,
vertex_buffer_layouts: Vec::new(),
cull_mode: Some(wgpu::Face::Back),
primitive_topology: wgpu::PrimitiveTopology::TriangleList
}
}
pub fn add_bindgroup(
mut self,
bindgroup: &'a wgpu::BindGroupLayout)
-> Self {
self.bind_groups.push(bindgroup);
self
}
pub fn add_vertex_layout(
mut self,
layout: wgpu::VertexBufferLayout<'a>)
-> Self {
self.vertex_buffer_layouts.push(layout);
self
}
pub fn cull_mode(
mut self,
mode: Option<wgpu::Face>
) -> Self {
self.cull_mode = mode; self
}
pub fn primitive_topology(
mut self,
topology: wgpu::PrimitiveTopology
) -> Self {
self.primitive_topology = topology; self
}
pub fn build(
self,
label: Option<&'static str>,
wgpuctx: &WgpuCtx)
-> wgpu::RenderPipeline
{
let layout_descr = wgpu::PipelineLayoutDescriptor {
label: label,
bind_group_layouts: self.bind_groups.as_slice(),
push_constant_ranges: &[]
};
let layout = wgpuctx.create_pipeline_layout(&layout_descr);
wgpuctx.create_render_pipeline(
&wgpu::RenderPipelineDescriptor {
label: label,
layout: Some(&layout),
vertex: wgpu::VertexState {
module: self.shader,
entry_point: self.vertex_entry_point,
compilation_options: match self.vertex_comp_options {
Some(option) => option,
None => wgpu::PipelineCompilationOptions::default()
},
buffers: self.vertex_buffer_layouts.as_slice()
},
fragment: Some(wgpu::FragmentState {
module: self.shader,
entry_point: self.fragment_entry_point,
compilation_options: match self.fragment_comp_options {
Some(option) => option,
None => wgpu::PipelineCompilationOptions::default()
},
targets: &[Some(wgpu::ColorTargetState {
format: wgpuctx.surface_config().format,
blend: Some(wgpu::BlendState{
color: wgpu::BlendComponent {
src_factor: wgpu::BlendFactor::SrcAlpha,
dst_factor: wgpu::BlendFactor::OneMinusSrcAlpha,
operation: wgpu::BlendOperation::Add
},
alpha: wgpu::BlendComponent::OVER
}),
write_mask: wgpu::ColorWrites::ALL
})],
}),
primitive: wgpu::PrimitiveState {
topology: self.primitive_topology,
strip_index_format: if self.primitive_topology.is_strip() {
Some(wgpu::IndexFormat::Uint32) } else {
None },
front_face: wgpu::FrontFace::Ccw,
cull_mode: self.cull_mode,
polygon_mode: wgpu::PolygonMode::Fill,
unclipped_depth: false,
conservative: false
},
depth_stencil: None,
multisample: wgpu::MultisampleState {
count: 1,
mask: !0,
alpha_to_coverage_enabled: false
},
multiview: None,
cache: None
}
)
}
}
|
