| 1 |
import { |
| 2 |
createShaderCanvas, |
| 3 |
DEFAULT_SHADER, |
| 4 |
} from '@auto-launch/functions/shader-canvas'; |
| 5 |
import { derivedShaderColors } from '@auto-launch/functions/shader-colors'; |
| 6 |
import { BG_SOURCE_ATTR } from '@auto-launch/functions/tokens'; |
| 7 |
import { useEffect, useRef, useState } from '@wordpress/element'; |
| 8 |
import { colord } from 'colord'; |
| 9 |
import { useReducedMotion } from 'framer-motion'; |
| 10 |
|
| 11 |
// The resolved tokens sit on the wrapper, not :root, so read from inside it. |
| 12 |
const readVar = (node, name) => |
| 13 |
getComputedStyle(node).getPropertyValue(name).trim(); |
| 14 |
|
| 15 |
const readSource = (node) => |
| 16 |
node.closest(`[${BG_SOURCE_ATTR}]`)?.getAttribute(BG_SOURCE_ATTR) || |
| 17 |
DEFAULT_SHADER; |
| 18 |
|
| 19 |
const toTriple = (value) => { |
| 20 |
const { r, g, b } = colord(value).toRgb(); |
| 21 |
return [r / 255, g / 255, b / 255]; |
| 22 |
}; |
| 23 |
|
| 24 |
const derivedColors = (node) => |
| 25 |
derivedShaderColors( |
| 26 |
readVar(node, '--color-ui-page') || '#2271b1', |
| 27 |
readVar(node, '--color-ui-action') || '#2271b1', |
| 28 |
); |
| 29 |
|
| 30 |
const numberVar = (node, name, fallback) => { |
| 31 |
const raw = readVar(node, name); |
| 32 |
if (!raw) return fallback; |
| 33 |
const value = Number.parseFloat(raw); |
| 34 |
return Number.isNaN(value) ? fallback : value; |
| 35 |
}; |
| 36 |
|
| 37 |
export const ShaderBackground = ({ still = false }) => { |
| 38 |
const canvasRef = useRef(null); |
| 39 |
const engineRef = useRef(null); |
| 40 |
const shouldReduceMotion = useReducedMotion(); |
| 41 |
const [tokens, setTokens] = useState(null); |
| 42 |
|
| 43 |
useEffect(() => { |
| 44 |
const node = canvasRef.current; |
| 45 |
if (!node) return; |
| 46 |
const read = () => { |
| 47 |
const derived = derivedColors(node); |
| 48 |
setTokens({ |
| 49 |
source: readSource(node), |
| 50 |
speed: numberVar(node, '--ext-ui-bg-speed', 1), |
| 51 |
scale: numberVar(node, '--ext-ui-bg-scale', 1), |
| 52 |
intensity: numberVar(node, '--ext-ui-bg-intensity', 1), |
| 53 |
offset: [ |
| 54 |
numberVar(node, '--ext-ui-bg-offset-x', 0), |
| 55 |
numberVar(node, '--ext-ui-bg-offset-y', 0), |
| 56 |
], |
| 57 |
colors: [ |
| 58 |
readVar(node, '--ext-ui-bg-color-1') || derived[0], |
| 59 |
readVar(node, '--ext-ui-bg-color-2') || derived[1], |
| 60 |
readVar(node, '--ext-ui-bg-color-3') || derived[2], |
| 61 |
], |
| 62 |
}); |
| 63 |
}; |
| 64 |
read(); |
| 65 |
}, []); |
| 66 |
|
| 67 |
useEffect(() => { |
| 68 |
const engine = createShaderCanvas(canvasRef.current); |
| 69 |
engineRef.current = engine; |
| 70 |
return () => { |
| 71 |
engine?.destroy(); |
| 72 |
engineRef.current = null; |
| 73 |
}; |
| 74 |
}, []); |
| 75 |
|
| 76 |
useEffect(() => { |
| 77 |
const engine = engineRef.current; |
| 78 |
if (!engine || !tokens) return; |
| 79 |
// GLSL compiles per driver, so a design's own source can be rejected here. |
| 80 |
if (engine.setSource(tokens.source)) return; |
| 81 |
engine.setSource(DEFAULT_SHADER); |
| 82 |
}, [tokens]); |
| 83 |
|
| 84 |
useEffect(() => { |
| 85 |
if (!tokens) return; |
| 86 |
engineRef.current?.setValues({ |
| 87 |
speed: tokens.speed, |
| 88 |
scale: tokens.scale, |
| 89 |
intensity: tokens.intensity, |
| 90 |
offset: tokens.offset, |
| 91 |
colors: tokens.colors.map(toTriple), |
| 92 |
}); |
| 93 |
}, [tokens]); |
| 94 |
|
| 95 |
useEffect(() => { |
| 96 |
engineRef.current?.setStill(still || Boolean(shouldReduceMotion)); |
| 97 |
}, [still, shouldReduceMotion]); |
| 98 |
|
| 99 |
return ( |
| 100 |
<canvas |
| 101 |
ref={canvasRef} |
| 102 |
className="pointer-events-none absolute inset-0 h-full w-full" |
| 103 |
/> |
| 104 |
); |
| 105 |
}; |
| 106 |
|
