INNER CODE UNIT · TypeScript
getLuminance
Dicklesworthstone/pi_agent_rust · legacy_pi_mono_code/pi-mono/packages/coding-agent/src/core/export-html/index.ts:60
function getLuminance(r: number, g: number, b: number): number {
const toLinear = (c: number) => {
const s = c / 255;
return s <= 0.03928 ? s / 12.92 : ((s + 0.055) / 1.055) ** 2.4;
};
return 0.2126 * toLinear(r) + 0.7152 * toLinear(g) + 0.0722 * toLinear(b);
}
/** Adjust color brightness. Factor > 1 lightens, < 1 darkens. */
function adjustBrightness(color: string, factor: number): string {
const parsed = parseColor(color);
if (!parsed) return color;
const adjust = (c: number) => Math.min(255, Math.max(0, Math.round(c * factor)));
return `rgb(${adjust(parsed.r)}, ${adjust(parsed.g)}, ${adjust(parsed.b)})`;
}
/** Derive export background colors from a base color (e.g., userMessageBg). */
function deriveExportColors(baseColor: string): { pageBg: string; cardBg: string; infoBg: string } {