dynamis-abi 0.7.0

Host to device record layouts, counters, and step parameters shared with WGSL
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

use crate::{constant, counter};

macro_rules! declare_constants {
    ($($(#[$meta:meta])* pub const $name:ident: $ty:ty = $value:expr;)*) => {
        $( $(#[$meta])* pub const $name: $ty = $value; )*

        pub(crate) fn emit_constants(out: &mut String) {
            $(
                assert!(
                    $name as u128 <= u32::MAX as u128,
                    concat!(stringify!($name), " must fit a 32 bit shader constant")
                );
                out.push_str(&format!("const {}: u32 = {}u;\n", stringify!($name), $name));
            )*
        }
    };
}

pub(crate) use declare_constants;

const DOF_PREDICATES: &str = "fn dof_locked(flags: u32, index: u32) -> bool { return (flags & (DOF_LOCKED << index)) != 0u; }
fn dof_limited(flags: u32, index: u32) -> bool { return (flags & (DOF_LIMITED << index)) != 0u; }
fn dof_driven(flags: u32, index: u32) -> bool { return (flags & (DOF_DRIVEN << index)) != 0u; }
";

pub fn constants_wgsl() -> String {
    let mut out = String::new();
    constant::emit_constants(&mut out);
    counter::device::emit_constants(&mut out);
    out.push_str(&format!(
        "const NO_HIT: f32 = {:e};
",
        constant::NO_HIT
    ));
    out.push_str(DOF_PREDICATES);
    out
}