// STRETCH — independent horizontal and vertical zoom about the frame
// centre, with a beat pump added to both axes at once.
{
    name: "Stretch"
    engine: "screen"
    input0: "test"

    // PERFORMANCE DIALS — mid-knob = the stock look, exact.
    p0: 0.5  p1: 0.5  p2: 0.5
    dials: [
        {name: "WIDE", bind: "p0", default: 0.5},
        {name: "TALL", bind: "p1", default: 0.5},
        {name: "PUMP", bind: "p2", default: 0.5}
    ]

    stages: [
        {kind: "bloom", threshold: 0.6, strength: 1.05, levels: 2}
    ]

    shader: draw.DrawVjFxScreen {
        fx_color: fn(uv: vec2, content: vec4, cmix: float) -> vec4 {
            let sx = 0.2 + 1.6 * self.user.x
            let sy = 0.2 + 1.6 * self.user.y
            let pump = 1.0 + self.time_beat.w * 0.3 * (0.2 + 1.6 * self.user.z)
            let c = uv - vec2(0.5, 0.5)
            let w = vec2(c.x / (sx * pump), c.y / (sy * pump)) + vec2(0.5, 0.5)
            let tex = self.tex0.sample_as_bgra(clamp(w, vec2(0.0, 0.0), vec2(1.0, 1.0)))
            return vec4(tex.xyz, 1.0)
        }
    }
}