shadcn-ui/apps/v4/app/og/route.tsx

import { ImageResponse } from "next/og"

async function loadAssets(): Promise<
  { name: string; data: Buffer; weight: 400 | 600; style: "normal" }[]
> {
  const [
    { base64Font: normal },
    { base64Font: mono },
    { base64Font: semibold },
  ] = await Promise.all([
    import("./geist-regular-otf.json").then((mod) => mod.default || mod),
    import("./geistmono-regular-otf.json").then((mod) => mod.default || mod),
    import("./geist-semibold-otf.json").then((mod) => mod.default || mod),
  ])

  return [
    {
      name: "Geist",
      data: Buffer.from(normal, "base64"),
      weight: 400 as const,
      style: "normal" as const,
    },
    {
      name: "Geist Mono",
      data: Buffer.from(mono, "base64"),
      weight: 400 as const,
      style: "normal" as const,
    },
    {
      name: "Geist",
      data: Buffer.from(semibold, "base64"),
      weight: 600 as const,
      style: "normal" as const,
    },
  ]
}

export async function GET(request: Request) {
  const { searchParams } = new URL(request.url)
  const title = searchParams.get("title")
  const description = searchParams.get("description")

  const [fonts] = await Promise.all([loadAssets()])

  return new ImageResponse(
    (
      <div
        tw="flex h-full w-full bg-black text-white"
        style={{ fontFamily: "Geist Sans" }}
      >
        <div tw="flex border absolute border-stone-700 border-dashed inset-y-0 left-16 w-[1px]" />
        <div tw="flex border absolute border-stone-700 border-dashed inset-y-0 right-16 w-[1px]" />
        <div tw="flex border absolute border-stone-700 inset-x-0 h-[1px] top-16" />
        <div tw="flex border absolute border-stone-700 inset-x-0 h-[1px] bottom-16" />
        <div tw="flex absolute flex-row bottom-24 right-24 text-white">
          <svg
            xmlns="http://www.w3.org/2000/svg"
            viewBox="0 0 256 256"
            width={48}
            height={48}
          >
            <rect width="256" height="256" fill="none"></rect>
            <line
              x1="208"
              y1="128"
              x2="128"
              y2="208"
              fill="none"
              stroke="currentColor"
              stroke-linecap="round"
              stroke-linejoin="round"
              stroke-width="32"
            ></line>
            <line
              x1="192"
              y1="40"
              x2="40"
              y2="192"
              fill="none"
              stroke="currentColor"
              stroke-linecap="round"
              stroke-linejoin="round"
              stroke-width="32"
            ></line>
          </svg>
        </div>
        <div tw="flex flex-col absolute w-[896px] justify-center inset-32">
          <div
            tw="tracking-tight flex-grow-1 flex flex-col justify-center leading-[1.1]"
            style={{
              textWrap: "balance",
              fontWeight: 600,
              fontSize: title && title.length > 20 ? 64 : 80,
              letterSpacing: "-0.04em",
            }}
          >
            {title}
          </div>
          <div
            tw="text-[40px] leading-[1.5] flex-grow-1 text-stone-400"
            style={{
              fontWeight: 500,
              textWrap: "balance",
            }}
          >
            {description}
          </div>
        </div>
      </div>
    ),
    {
      width: 1200,
      height: 628,
      fonts,
    }
  )
}