Static MTKTextureLoaderOriginBottomLeft 

pub unsafe static MTKTextureLoaderOriginBottomLeft: &'static MTKTextureLoaderOrigin

Available on crate feature MTKTextureLoader only.

Identifier specifying that the texture loader should flip textures whose origin is in the top-left corner

The texture will be flipped vertically if metadata in the file being loaded indicates that the source data starts with the top-left corner of the texture.

See also Apple’s documentation