// TINT — the picture is recoloured into a single hue: AMOUNT dials how
// much of the original survives, LUMA how much the tint still shades by
// brightness versus sitting flat, GLOW lifts the tint's own brightness.
{
    name: "Tint"
    engine: "screen"
    seed: 204
    input0: "test"

    speed: 1.0
    beat_pulse: 0.4
    beat_rate: 1.0
    bar_beats: 4
    glow: 1.0
    // PERFORMANCE DIALS — mid-knob = the stock look, exact.
    p0: 0.5  p1: 0.5  p2: 0.5
    dials: [
        {name: "AMOUNT", bind: "p0", default: 0.5},
        {name: "LUMA", bind: "p1", default: 0.5},
        {name: "GLOW", bind: "p2", default: 0.5}
    ]

    color_bg: #x03040a
    color_a: #xff8844
    color_b: #xff3a86
    color_c: #xfff0d0

    stages: [
        {kind: "bloom", threshold: 0.6, strength: 1.0, levels: 2}
    ]

    // THE LOOK LIVES HERE: the whole frame is this function. col_a is the
    // tint colour; the picture crossfades into it, luma-shaded or flat.
    // Inputs: uv, content = input0 at uv, cmix = pre-gated content
    // strength. Signals: self.time_beat (time, beat, phase, pulse),
    // self.sig (bar, bpm, energy, dt), self.user (p0..p3),
    // self.col_a/b/c/bg, self.fog (density, glow, content, -).
    shader: draw.DrawVjFxScreen {
        fx_color: fn(uv: vec2, content: vec4, cmix: float) -> vec4 {
            let luma = dot(content.xyz, vec3(0.299, 0.587, 0.114))
            let amount = clamp(0.2 + 1.6 * self.user.x, 0.0, 1.0)
            let lumamix = clamp(self.user.y, 0.0, 1.0)
            let glow = 0.5 + 1.5 * self.user.z
            let flat = self.col_a.xyz
            let shaded = self.col_a.xyz * (0.3 + 1.4 * luma)
            let tint = flat.mix(shaded, lumamix) * glow
            let rgb = content.xyz.mix(tint, amount)
            return vec4(clamp(rgb, vec3(0.0, 0.0, 0.0), vec3(1.0, 1.0, 1.0)), 1.0)
        }
    }
}