d8d5ea8b6a
Restore missing required asset/flow packages from the pinned nigig revision; retain upstream script isolation, X11 hover, and widget-core fixes. Validated makepad-widgets data feature with Rust 1.97.1.
43 lines
1.8 KiB
Text
43 lines
1.8 KiB
Text
// OVERLAY — the classic photo-editor combine, applied to LUMA only (so
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// deck B keeps its own hue while borrowing deck A's contrast curve):
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// per pixel, if A's luma is dark the result folds toward 2*a*b (a
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// multiply), if light it folds toward 1-2*(1-a)*(1-b) (a screen) — one
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// seamless S-curve between the two. DEPTH pushes A's luma contrast
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// before the fold, SAT keeps or flattens B's own colour in the result,
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// BAL shifts the fold's pivot off the classic 0.5 midpoint.
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{
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name: "Overlay"
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engine: "transition"
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engage: "ramp"
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dials: [
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{name: "DEPTH", bind: "p0", default: 0.5},
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{name: "SAT", bind: "p1", default: 0.6},
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{name: "BAL", bind: "p2", default: 0.5}
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]
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shader: draw.DrawVjFxDuo {
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overlay1: fn(a: float, b: float, piv: float) -> float {
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let lo = 2.0 * a * b
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let hi = 1.0 - 2.0 * (1.0 - a) * (1.0 - b)
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return mix(lo, hi, step(piv, a))
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}
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trans: fn(uv: vec2, t: float) -> vec4 {
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let a = self.deck_a(uv)
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let b = self.deck_b(uv)
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let w = vec3(0.2126, 0.7152, 0.0722)
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let luma_a = dot(a.xyz, w)
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let luma_b = dot(b.xyz, w)
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let depth = 0.2 + self.user.x * 1.8
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let la = clamp(0.5 + (luma_a - 0.5) * depth, 0.0, 1.0)
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let piv = 0.1 + self.user.z * 0.8
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let luma_out = self.overlay1(la, luma_b, piv)
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let ratio = luma_out / max(luma_b, 0.02)
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let flat = vec3(luma_out, luma_out, luma_out)
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let toned = flat.mix(b.xyz * ratio, self.user.y)
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let composite = a.xyz.mix(toned, clamp(t, 0.0, 1.0))
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let cx = clamp(composite.x, 0.0, 1.0)
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let cy = clamp(composite.y, 0.0, 1.0)
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let cz = clamp(composite.z, 0.0, 1.0)
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return vec4(cx, cy, cz, 1.0)
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}
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}
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}
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