YUVAInfo

class YUVAInfo

Specifies the structure of planes for a YUV image with optional alpha. The actual planar data is not part of this structure and depending on usage is in external textures or pixmaps.

Classes

`PlaneConfig`	Specifies how YUV (and optionally A) are divided among planes. Planes are separated by
`Siting`	Describes how subsampled chroma values are sited relative to luma values.
`Subsampling`	UV subsampling is also specified in the enum value names using J:a:b notation (e.g. 4:2:0 is

Methods

`HasAlpha`	Does the PlaneConfig have alpha values?
`NumChannelsInPlane`	Number of Y, U, V, A channels in the ith plane for a given PlaneConfig (or 0 if i is invalid).
`NumPlanes`	Number of planes for a given PlaneConfig.
`PlaneDimensions`	Given image dimensions, a planar configuration, and origin, determine the expected size of each plane.
`__init__`	Overloaded function.
`computeTotalBytes`	Given a per-plane row bytes, determine size to allocate for all planes.
`dimensions`	Dimensions of the full resolution image (after planes have been oriented to how the image is displayed as indicated by fOrigin).
`hasAlpha`
`height`
`numChannelsInPlane`
`numPlanes`
`origin`
`planeConfig`
`planeDimensions`	Returns the number of planes and initializes planeDimensions[0]..planeDimensions[<ret>] to the expected dimensions for each plane.
`sitingX`
`sitingY`
`subSampling`
`width`
`yuvColorSpace`

Attributes

`k410`
`k411`
`k420`
`k422`
`k440`
`k444`
`kCentered`
`kMaxPlanes`
`kUYV`
`kUYVA`
`kUnknown`
`kYUV`
`kYUVA`
`kY_UV`
`kY_UV_A`
`kY_U_V`
`kY_U_V_A`
`kY_VU`
`kY_VU_A`
`kY_V_U`
`kY_V_U_A`

Methods

static YUVAInfo.HasAlpha(config: skia.YUVAInfo.PlaneConfig) → bool: Does the PlaneConfig have alpha values?

static YUVAInfo.NumChannelsInPlane(config: skia.YUVAInfo.PlaneConfig, i: int) → int: Number of Y, U, V, A channels in the ith plane for a given PlaneConfig (or 0 if i is invalid).

static YUVAInfo.NumPlanes(config: skia.YUVAInfo.PlaneConfig) → int: Number of planes for a given PlaneConfig.

static YUVAInfo.PlaneDimensions(imageDimensions: skia.ISize, config: skia.YUVAInfo.PlaneConfig, sampling: skia.YUVAInfo.Subsampling, origin: skia.EncodedOrigin) → list[skia.ISize]

Given image dimensions, a planar configuration, and origin, determine the expected size of each plane. Returns a list of expected planes.

The input image dimensions are as displayed (after the planes have been transformed to the intended display orientation).

YUVAInfo.__init__(*args, **kwargs)

Overloaded function.

__init__(self: skia.YUVAInfo) -> None
__init__(self: skia.YUVAInfo, dimensions: skia.ISize, config: skia.YUVAInfo.PlaneConfig, sampling: skia.YUVAInfo.Subsampling, yuvColorSpace: skia.YUVColorSpace, origin: skia.EncodedOrigin = skia.EncodedOrigin.kTopLeft_EncodedOrigin, sittingX: skia.YUVAInfo.Siting = skia.SkYUVAInfo.Siting.kCentered, sittingY: skia.YUVAInfo.Siting = skia.SkYUVAInfo.Siting.kCentered) -> None

‘dimensions’ should specify the size of the full resolution image (after planes have been oriented to how the image is displayed as indicated by ‘origin’).

YUVAInfo.computeTotalBytes(self: skia.YUVAInfo, rowBytes: list[int], returnPlaneSizes: bool = False) → object: Given a per-plane row bytes, determine size to allocate for all planes. Optionally retrieves the per-plane byte sizes if returnPlaneSizes is True. If total size overflows will return SIZE_MAX and set all planeSizes to SIZE_MAX.

YUVAInfo.dimensions(self: skia.YUVAInfo) → skia.ISize: Dimensions of the full resolution image (after planes have been oriented to how the image is displayed as indicated by fOrigin).

YUVAInfo.hasAlpha(self: skia.YUVAInfo) → bool

YUVAInfo.height(self: skia.YUVAInfo) → int

YUVAInfo.numChannelsInPlane(self: skia.YUVAInfo, i: int) → int

YUVAInfo.numPlanes(self: skia.YUVAInfo) → int

YUVAInfo.origin(self: skia.YUVAInfo) → skia.EncodedOrigin

YUVAInfo.planeConfig(self: skia.YUVAInfo) → skia.YUVAInfo.PlaneConfig

YUVAInfo.planeDimensions(self: skia.YUVAInfo) → list[skia.ISize]: Returns the number of planes and initializes planeDimensions[0]..planeDimensions[<ret>] to the expected dimensions for each plane. Dimensions are as stored in memory, before transformation to image display space as indicated by origin().

YUVAInfo.sitingX(self: skia.YUVAInfo) → skia.YUVAInfo.Siting

YUVAInfo.sitingY(self: skia.YUVAInfo) → skia.YUVAInfo.Siting

YUVAInfo.subSampling(self: skia.YUVAInfo) → skia.YUVAInfo.Subsampling

YUVAInfo.width(self: skia.YUVAInfo) → int

YUVAInfo.yuvColorSpace(self: skia.YUVAInfo) → skia.YUVColorSpace

Attributes

YUVAInfo.k410 = <Subsampling.k410: 6>

YUVAInfo.k411 = <Subsampling.k411: 5>

YUVAInfo.k420 = <Subsampling.k420: 3>

YUVAInfo.k422 = <Subsampling.k422: 2>

YUVAInfo.k440 = <Subsampling.k440: 4>

YUVAInfo.k444 = <Subsampling.k444: 1>

YUVAInfo.kCentered = <Siting.kCentered: 0>

YUVAInfo.kMaxPlanes = 4

YUVAInfo.kUYV = <PlaneConfig.kUYV: 6>

YUVAInfo.kUYVA = <PlaneConfig.kUYVA: 12>

YUVAInfo.kUnknown = <Subsampling.kUnknown: 0>

YUVAInfo.kYUV = <PlaneConfig.kYUV: 5>

YUVAInfo.kYUVA = <PlaneConfig.kYUVA: 11>

YUVAInfo.kY_UV = <PlaneConfig.kY_UV: 3>

YUVAInfo.kY_UV_A = <PlaneConfig.kY_UV_A: 9>

YUVAInfo.kY_U_V = <PlaneConfig.kY_U_V: 1>

YUVAInfo.kY_U_V_A = <PlaneConfig.kY_U_V_A: 7>

YUVAInfo.kY_VU = <PlaneConfig.kY_VU: 4>

YUVAInfo.kY_VU_A = <PlaneConfig.kY_VU_A: 10>

YUVAInfo.kY_V_U = <PlaneConfig.kY_V_U: 2>

YUVAInfo.kY_V_U_A = <PlaneConfig.kY_V_U_A: 8>