myth_render 0.3.0

Core rendering system for the Myth engine (render graph, pipeline, GPU management).
Documentation 
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// ── PBR In-Material Tone Mapping ────────────────────────────────────────
//
// Neutral-style tone mapping applied per-material in non-HDR pipelines.
// Pure function: takes a linear-space color and returns the mapped result.

fn apply_pbr_tone_mapping(color: vec3<f32>) -> vec3<f32> {
    let start_compression = 0.8 - 0.04;
    let desaturation = 0.15;

    let x = min(color.r, min(color.g, color.b));
    let offset = select(0.04, x - 6.25 * x * x, x < 0.08);

    var mapped_color = color - vec3<f32>(offset);

    let peak = max(mapped_color.r, max(mapped_color.g, mapped_color.b));

    if (peak < start_compression) {
        return mapped_color;
    }

    let d = 1.0 - start_compression;
    let new_peak = 1.0 - d * d / (peak + d - start_compression);

    mapped_color *= (new_peak / peak);

    let g = 1.0 - 1.0 / (desaturation * (peak - new_peak) + 1.0);

    return mix(mapped_color, vec3<f32>(new_peak), g);
}