indexed2(palette:fill:)

A 2-bit indexed color format.

PNG.Format.swift:156

case indexed2(palette: [(r: UInt8, g: UInt8, b: UInt8, a: UInt8)], fill: Int?)

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FNV24: [87LLQ]

Parameters

palette

The palette values referenced by an image with this color format. This palette must be non-empty, and can have at most 4 entries.

fill

A palette index specifying an optional background color. This index must be within the index range of the palette array.

Most PNG viewers ignore this field.

This color format has a pixel format of indexed2.

Other cases

case v1(fill: UInt8?, key: UInt8?)
A 1-bit grayscale color format.
case v2(fill: UInt8?, key: UInt8?)
A 2-bit grayscale color format.
case v4(fill: UInt8?, key: UInt8?)
A 4-bit grayscale color format.
case v8(fill: UInt8?, key: UInt8?)
An 8-bit grayscale color format.
case v16(fill: UInt16?, key: UInt16?)
A 16-bit grayscale color format.
case bgr8(palette: [(b: UInt8, g: UInt8, r: UInt8)], fill: (b: UInt8, g: UInt8, r: UInt8)?, key: (b: UInt8, g: UInt8, r: UInt8)?)
An 8-bit BGR color format.
case rgb8(palette: [(r: UInt8, g: UInt8, b: UInt8)], fill: (r: UInt8, g: UInt8, b: UInt8)?, key: (r: UInt8, g: UInt8, b: UInt8)?)
An 8-bit RGB color format.
case rgb16(palette: [(r: UInt8, g: UInt8, b: UInt8)], fill: (r: UInt16, g: UInt16, b: UInt16)?, key: (r: UInt16, g: UInt16, b: UInt16)?)
A 16-bit RGB color format.
case indexed1(palette: [(r: UInt8, g: UInt8, b: UInt8, a: UInt8)], fill: Int?)
A 1-bit indexed color format.
case indexed4(palette: [(r: UInt8, g: UInt8, b: UInt8, a: UInt8)], fill: Int?)
A 4-bit indexed color format.
case indexed8(palette: [(r: UInt8, g: UInt8, b: UInt8, a: UInt8)], fill: Int?)
An 8-bit indexed color format.
case va8(fill: UInt8?)
An 8-bit grayscale-alpha color format.
case va16(fill: UInt16?)
A 16-bit grayscale-alpha color format.
case bgra8(palette: [(b: UInt8, g: UInt8, r: UInt8)], fill: (b: UInt8, g: UInt8, r: UInt8)?)
An 8-bit BGRA color format.
case rgba8(palette: [(r: UInt8, g: UInt8, b: UInt8)], fill: (r: UInt8, g: UInt8, b: UInt8)?)
An 8-bit RGBA color format.
case rgba16(palette: [(r: UInt8, g: UInt8, b: UInt8)], fill: (r: UInt16, g: UInt16, b: UInt16)?)
A 16-bit RGBA color format.