wgsl_to_wgpu 0.17.1

Generate typesafe Rust bindings from WGSL shaders to wgpu
Documentation 
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---
source: wgsl_to_wgpu/src/lib.rs
---
pub struct OverrideConstants {
    pub b1: Option<bool>,
    pub b2: Option<bool>,
    pub b3: bool,
    pub f1: Option<f32>,
    pub f2: f32,
    pub f3: Option<f64>,
    pub f4: f64,
    pub i1: Option<i32>,
    pub i2: i32,
    pub i3: Option<i32>,
    pub a: Option<f32>,
    pub b: Option<f32>,
}
impl OverrideConstants {
    pub fn constants(&self) -> Vec<(&'static str, f64)> {
        let mut entries = vec![
            ("b3", if self.b3 { 1.0 } else { 0.0 }), ("f2", self.f2 as f64), ("f4", self
            .f4 as f64), ("i2", self.i2 as f64)
        ];
        if let Some(value) = self.b1 {
            entries.push(("b1", if value { 1.0 } else { 0.0 }));
        }
        if let Some(value) = self.b2 {
            entries.push(("b2", if value { 1.0 } else { 0.0 }));
        }
        if let Some(value) = self.f1 {
            entries.push(("f1", value as f64));
        }
        if let Some(value) = self.f3 {
            entries.push(("f3", value as f64));
        }
        if let Some(value) = self.i1 {
            entries.push(("i1", value as f64));
        }
        if let Some(value) = self.i3 {
            entries.push(("i3", value as f64));
        }
        if let Some(value) = self.a {
            entries.push(("0", value as f64));
        }
        if let Some(value) = self.b {
            entries.push(("35", value as f64));
        }
        entries
    }
}
pub const ENTRY_MAIN: &str = "main";
#[derive(Debug)]
pub struct FragmentEntry<const N: usize> {
    pub entry_point: &'static str,
    pub targets: [Option<wgpu::ColorTargetState>; N],
    pub constants: Vec<(&'static str, f64)>,
}
pub fn fragment_state<'a, const N: usize>(
    module: &'a wgpu::ShaderModule,
    entry: &'a FragmentEntry<N>,
) -> wgpu::FragmentState<'a> {
    wgpu::FragmentState {
        module,
        entry_point: Some(entry.entry_point),
        targets: &entry.targets,
        compilation_options: wgpu::PipelineCompilationOptions {
            constants: &entry.constants,
            ..Default::default()
        },
    }
}
pub fn main_entry(
    targets: [Option<wgpu::ColorTargetState>; 0],
    overrides: &OverrideConstants,
) -> FragmentEntry<0> {
    FragmentEntry {
        entry_point: ENTRY_MAIN,
        targets,
        constants: overrides.constants(),
    }
}
pub const SOURCE: &str = include_str!("shader.wgsl");
pub fn create_shader_module(device: &wgpu::Device) -> wgpu::ShaderModule {
    let source = std::borrow::Cow::Borrowed(SOURCE);
    device
        .create_shader_module(wgpu::ShaderModuleDescriptor {
            label: None,
            source: wgpu::ShaderSource::Wgsl(source),
        })
}
pub fn create_pipeline_layout(device: &wgpu::Device) -> wgpu::PipelineLayout {
    device
        .create_pipeline_layout(
            &wgpu::PipelineLayoutDescriptor {
                label: None,
                bind_group_layouts: &[],
                immediate_size: 0,
            },
        )
}