Function getOrLoadFrustumBitmap

src/hooks/frustumTextureCache.ts:54–75

(
  url: string,
  imageName: string,
  bitmapCache: FrustumBitmapCache,
  deps: LoadFrustumBitmapDeps = {}
)

}

export async function getOrLoadFrustumBitmap(
  url: string,
  imageName: string,
  bitmapCache: FrustumBitmapCache,
  deps: LoadFrustumBitmapDeps = {}
): Promise<ImageBitmap | null> {
  const cached = getCachedFrustumBitmap(bitmapCache, imageName, deps.now);
  if (cached) return cached;

  try {
    const fetchBlob = deps.fetchBlob ?? ((input: string) => fetch(input));
    const createBitmap = deps.createBitmap ?? createImageBitmap;
    const response = await fetchBlob(url);
    const blob = await response.blob();
    const bitmap = await createBitmap(blob);

    bitmapCache.set(imageName, { bitmap, lastUsed: (deps.now ?? Date.now)() });
    return bitmap;
  } catch {
    return null;
  }
}

export function getActiveFrustumTexture(
  activeTextures: FrustumTextureCache,