ColorInfo

class ColorInfo

Describes pixel and encoding.

ImageInfo can be created from ColorInfo by providing dimensions.

It encodes how pixel bits describe alpha, transparency; color components red, blue, and green; and ColorSpace, the range and linearity of colors.

Methods

__init__	Overloaded function.
alphaType
bytesPerPixel	Returns number of bytes per pixel required by ColorType.
colorSpace
colorType
gammaCloseToSRGB
isOpaque
makeAlphaType	Creates ColorInfo with same ColorType, ColorSpace, with AlphaType set to newAlphaType.
makeColorSpace	Creates ColorInfo with same AlphaType, ColorType, with ColorSpace set to cs.
makeColorType	Creates new ColorInfo with same AlphaType, ColorSpace, with ColorType set to newColorType.
refColorSpace
shiftPerPixel	Returns bit shift converting row bytes to row pixels.

Methods

ColorInfo.__init__(*args, **kwargs)

Overloaded function.

1. __init__(self: skia.ColorInfo) -> None

   Creates an ColorInfo with kUnknown_ColorType, kUnknown_AlphaType, and no ColorSpace.

2. __init__(self: skia.ColorInfo, ct: skia.ColorType, at: skia.AlphaType, cs: skia.ColorSpace = None) -> None

   Creates ColorInfo from ColorType ct, AlphaType at, and optionally ColorSpace cs.

   If ColorSpace cs is nullptr and ColorInfo is part of drawing source: ColorSpace defaults to sRGB, mapping into Surface ColorSpace.

   Parameters are not validated to see if their values are legal, or that the combination is supported.

3. __init__(self: skia.ColorInfo, arg0: skia.ColorInfo) -> None

ColorInfo.alphaType(self: skia.ColorInfo) → skia.AlphaType

ColorInfo.bytesPerPixel(self: skia.ColorInfo) → int

Returns number of bytes per pixel required by ColorType.

Returns zero if colorType() is kUnknown_ColorType.

Returns:

bytes in pixel

ColorInfo.colorSpace(self: skia.ColorInfo) → skia.ColorSpace

ColorInfo.colorType(self: skia.ColorInfo) → skia.ColorType

ColorInfo.gammaCloseToSRGB(self: skia.ColorInfo) → bool

ColorInfo.isOpaque(self: skia.ColorInfo) → bool

ColorInfo.makeAlphaType(self: skia.ColorInfo, newAlphaType: skia.AlphaType) → skia.ColorInfo

Creates ColorInfo with same ColorType, ColorSpace, with AlphaType set to newAlphaType.

Created ColorInfo contains newAlphaType even if it is incompatible with ColorType, in which case AlphaType in ColorInfo is ignored.

ColorInfo.makeColorSpace(self: skia.ColorInfo, cs: skia.ColorSpace) → skia.ColorInfo

Creates ColorInfo with same AlphaType, ColorType, with ColorSpace set to cs.

cs may be nullptr.

ColorInfo.makeColorType(self: skia.ColorInfo, newColorType: skia.ColorType) → skia.ColorInfo

Creates new ColorInfo with same AlphaType, ColorSpace, with ColorType set to newColorType.

ColorInfo.refColorSpace(self: skia.ColorInfo) → skia.ColorSpace

ColorInfo.shiftPerPixel(self: skia.ColorInfo) → int

Returns bit shift converting row bytes to row pixels.

Returns zero for ColorType.kUnknown_ColorType.

Returns:

one of: 0, 1, 2, 3, 4; left shift to convert pixels to bytes