Instance Property

decode

Returns the decode array for a bitmap image.

Declaration

var decode: UnsafePointer<CGFloat>? { get }

Parameters

image

The image to examine.

Return Value

The decode array for a bitmap image (or image mask). See the discussion for a description of possible return values.

Discussion

For a bitmap image or image mask, for each color component in the source color space, the decode array contains a pair of values denoting the upper and lower limits of a range. When the image is rendered, a linear transform maps the original component value into a relative number, within the designated range, that is appropriate for the destination color space. If remapping of the image’s color values is not allowed, the returned value will be NULL.

See Also

Examining an Image

var isMask: Bool

Returns whether a bitmap image is an image mask.

var width: Int

Returns the width of a bitmap image.

var height: Int

Returns the height of a bitmap image.

var bitsPerComponent: Int

Returns the number of bits allocated for a single color component of a bitmap image.

var bitsPerPixel: Int

Returns the number of bits allocated for a single pixel in a bitmap image.

var bytesPerRow: Int

Returns the number of bytes allocated for a single row of a bitmap image.

var colorSpace: CGColorSpace?

Return the color space for a bitmap image.

var alphaInfo: CGImageAlphaInfo

Returns the alpha channel information for a bitmap image.

enum CGImageAlphaInfo

Storage options for alpha component data.

var dataProvider: CGDataProvider?

Returns the data provider for a bitmap image.

var shouldInterpolate: Bool

Returns the interpolation setting for a bitmap image.

var renderingIntent: CGColorRenderingIntent

Returns the rendering intent setting for a bitmap image.

var bitmapInfo: CGBitmapInfo

Returns the bitmap information for a bitmap image.

struct CGBitmapInfo

Component information for a bitmap image.

var utType: CFString?

The Universal Type Identifier for the image.