Static kCVImageBufferDisplayMaskRectangleKey 

pub unsafe static kCVImageBufferDisplayMaskRectangleKey: &'static CFString

Available on crate feature CVImageBuffer only.

Specifies the rectangular display area within the image. The left, width, top and height are specified relative to a reference raster width and height that should be scaled to the image buffer dimensions.

Value is a dictionary containing these keys for the raster rectangle: kCVImageBufferDisplayMaskRectangle_ReferenceRasterWidthKey kCVImageBufferDisplayMaskRectangle_ReferenceRasterHeightKey kCVImageBufferDisplayMaskRectangle_RectangleLeftKey kCVImageBufferDisplayMaskRectangle_RectangleWidthKey kCVImageBufferDisplayMaskRectangle_RectangleTopKey kCVImageBufferDisplayMaskRectangle_RectangleHeightKey

See also Apple’s documentation