Function parseNativeImageSize

packages/ai-gemini/src/image/image-provider-options.ts:314–321

(
  size: string,
)

 * Format: "aspectRatio_resolution" e.g. "16:9_4K" → { aspectRatio: "16:9", resolution: "4K" }
 */
export function parseNativeImageSize(
  size: string,
): { aspectRatio: string; resolution: string } | undefined {
  const match = size.match(/^(\d+:\d+)_(.+)$/)
  const [, aspectRatio, resolution] = match ?? []
  if (aspectRatio === undefined || resolution === undefined) return undefined
  return { aspectRatio, resolution }
}