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我在 AIR 3.3 for iOS 中的大图像上使用 cacheAsBitmap 和 cacheAsBitmapMatrix。旧硬件有 2048x2048 GPU 纹理大小限制，新 iPad (3) 有 4096x4096。有没有办法检查代码中的这个大小限制，而不是将代码链接到特定的现有模型？