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

`PlanarConfig`	Specifies how YUV (and optionally A) are divided among planes. Planes are
`Siting`	Describes how subsampled chroma values are sited relative to luma values.

Methods

`HasAlpha`	Does the PlanarConfig have alpha values?
`NumChannelsInPlane`	Number of Y, U, V, A channels in the ith plane for a given PlanarConfig (or 0 if i is invalid).
`NumPlanes`	Number of planes for a given PlanarConfig.
`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`
`planarConfig`
`planeDimensions`	Returns the number of planes and initializes planeDimensions[0]..planeDimensions[<ret>] to the expected dimensions for each plane.
`sitingX`
`sitingY`
`width`
`yuvColorSpace`

Attributes

`kCentered`
`kMaxPlanes`
`kUYVA_4444`
`kUYV_444`
`kYUVA_4444`
`kYUV_444`
`kY_UV_420`
`kY_UV_A_4204`
`kY_U_V_410`
`kY_U_V_411`
`kY_U_V_420`
`kY_U_V_422`
`kY_U_V_440`
`kY_U_V_444`
`kY_U_V_A_4204`
`kY_VU_420`
`kY_VU_A_4204`
`kY_V_U_420`
`kY_V_U_A_4204`

Methods

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

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

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

static YUVAInfo.PlaneDimensions(imageDimensions: skia.ISize, config: skia.YUVAInfo.PlanarConfig, 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.PlanarConfig, yuvColorSpace: skia.YUVColorSpace, origin: skia.EncodedOrigin = <EncodedOrigin.kTopLeft_EncodedOrigin: 1>, sittingX: skia.YUVAInfo.Siting = <Siting.kCentered: 0>, sittingY: skia.YUVAInfo.Siting = <Siting.kCentered: 0>) -> 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.planarConfig(self: skia.YUVAInfo) → skia.YUVAInfo.PlanarConfig

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.width(self: skia.YUVAInfo) → int

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

Attributes

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

YUVAInfo.kMaxPlanes = 4

YUVAInfo.kUYVA_4444 = <PlanarConfig.kUYVA_4444: 16>

YUVAInfo.kUYV_444 = <PlanarConfig.kUYV_444: 14>

YUVAInfo.kYUVA_4444 = <PlanarConfig.kYUVA_4444: 15>

YUVAInfo.kYUV_444 = <PlanarConfig.kYUV_444: 13>

YUVAInfo.kY_UV_420 = <PlanarConfig.kY_UV_420: 9>

YUVAInfo.kY_UV_A_4204 = <PlanarConfig.kY_UV_A_4204: 11>

YUVAInfo.kY_U_V_410 = <PlanarConfig.kY_U_V_410: 6>

YUVAInfo.kY_U_V_411 = <PlanarConfig.kY_U_V_411: 5>

YUVAInfo.kY_U_V_420 = <PlanarConfig.kY_U_V_420: 2>

YUVAInfo.kY_U_V_422 = <PlanarConfig.kY_U_V_422: 1>

YUVAInfo.kY_U_V_440 = <PlanarConfig.kY_U_V_440: 4>

YUVAInfo.kY_U_V_444 = <PlanarConfig.kY_U_V_444: 0>

YUVAInfo.kY_U_V_A_4204 = <PlanarConfig.kY_U_V_A_4204: 7>

YUVAInfo.kY_VU_420 = <PlanarConfig.kY_VU_420: 10>

YUVAInfo.kY_VU_A_4204 = <PlanarConfig.kY_VU_A_4204: 12>

YUVAInfo.kY_V_U_420 = <PlanarConfig.kY_V_U_420: 3>

YUVAInfo.kY_V_U_A_4204 = <PlanarConfig.kY_V_U_A_4204: 8>