| droppedFrameCount | 输出自上次更新以来丢弃的帧数。 |
bool 如果丢弃的帧数量可用，则返回 true。否则返回 false。
获取 XR 插件报告的丢弃的帧数。
对游戏和应用程序使用此方法，可动态缩放内容或设置以最大限度提高帧率。XR 应用程序和游戏必须以一致的高帧率运行。如果应用程序具有太多绘制调用或计算，则可能必须“丢弃”帧才能保持高帧率。如果 SDK 报告应用程序正在丢弃帧，应用程序可以调整设置、禁用对象或执行其他操作来减少开销。
统计信息只能用于支持此方法的 SDK，可能会因硬件、SDK 和帧而异。在使用 out 参数的统计信息值之前，应始终检查此方法的返回值。
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