// EDGE CLONE — a cropped window in the middle of the frame, its border
// pixels cloned outward to fill the rest: the classic streaked-edge
// frame, no black bars.
{
    name: "Edge Clone"
    engine: "screen"
    input0: "test"

    p0: 0.5  p1: 0.5  p2: 0.5
    dials: [
        {name: "WINDOW", bind: "p0", default: 0.5},
        {name: "ZOOM", bind: "p1", default: 0.5},
        {name: "GLOW", 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 inset = 0.08 + 0.26 * self.user.x
            let lo = vec2(inset, inset)
            let hi = vec2(1.0 - inset, 1.0 - inset)
            let zoom = 0.2 + 1.6 * self.user.y
            let c = clamp(uv, lo, hi) - vec2(0.5, 0.5)
            let cw = c / zoom + vec2(0.5, 0.5)
            let outside = 1.0 - step(lo.x, uv.x) * step(uv.x, hi.x) * step(lo.y, uv.y) * step(uv.y, hi.y)
            let tex = self.tex0.sample_as_bgra(clamp(cw, vec2(0.0, 0.0), vec2(1.0, 1.0)))
            let dim = 1.0 - 0.35 * outside * (0.2 + 1.6 * self.user.z)
            return vec4(tex.xyz * dim, 1.0)
        }
    }
}