Function prefetchFrustumTextures

src/hooks/useFrustumTexture.ts:188–204

(
  images: Array<{ file: File; name: string }>,
  onProgress?: (progress: number) => void
)

 * This caches resized bitmaps, not actual GPU textures.
 */
export async function prefetchFrustumTextures(
  images: Array<{ file: File; name: string }>,
  onProgress?: (progress: number) => void
): Promise<void> {
  if (images.length === 0) {
    onProgress?.(1);
    return;
  }

  let completed = 0;
  for (const { file, name } of images) {
    await loadFrustumBitmapFromFile(file, name);
    completed++;
    onProgress?.(completed / images.length);
  }
  notifyFrustumTextureCacheChanged();
}

export interface BackgroundFrustumTexturePrefetchOptions {
  batchSize?: number;