tldraw
Version:
A tiny little drawing editor.
17 lines (14 loc) • 485 B
text/typescript
const memo = {} as Record<string, Float32Array>
export function getRgba(colorString: string) {
if (memo[colorString]) {
return memo[colorString]
}
const canvas = document.createElement('canvas')
const context = canvas.getContext('2d')
context!.fillStyle = colorString
context!.fillRect(0, 0, 1, 1)
const [r, g, b, a] = context!.getImageData(0, 0, 1, 1).data
const result = new Float32Array([r / 255, g / 255, b / 255, a / 255])
memo[colorString] = result
return result
}