init(extent:format:)
Initializes an image accumulator with the specified extent and pixel format.
Declaration
init?(extent: CGRect, format: CIFormat)Parameters
- extent:
A rectangle that specifies the x-value of the rectangle origin, the y-value of the rectangle origin, and the width and height.
- format:
The format and size of each pixel. You must supply a pixel format constant, such askCIFormatARGB8 (32 bit-per-pixel, fixed-point pixel format) or kCIFormatRGBAf (128 bit-per-pixel, floating-point pixel format). See Ciimage for more information about pixel format constants.
Return Value
The initialized image accumulator object.