IntPtr 指向底层图形 API 深度缓冲区资源的指针。
检索指向深度缓冲区资源的原生（底层图形 API）指针。
使用此函数检索与 RenderTexture 的深度缓冲区部分相对应的指针/句柄，如原生图形 API 级别表示的那样。这可用于启用来自原生代码插件的深度缓冲区操作。
使用Texture.GetNativeTexturePtr 获取指向渲染纹理的颜色缓冲区的原生指针，并使用此函数获取深度缓冲区部分。对于深度和阴影贴图渲染纹理格式，这两个函数返回相同的资源。如果在项目的质量设置中启用了抗锯齿，这两个函数也会返回相同的资源。
请注意，在使用多线程渲染时调用此函数将与渲染线程同步（一项缓慢操作），因此最佳实践是在初始化时仅设置所需的纹理指针。
其他资源：Texture.GetNativeTexturePtr，原生代码插件。
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