S or /
skia

SourceClass ImageInfo

from skia import ImageInfo
class ImageInfo:

Describes pixel dimensions and encoding. skia.Bitmap, skia.Image, skia.Pixmap, and skia.Surface can be created from ImageInfo. ImageInfo can be retrieved from skia.Bitmap and skia.Pixmap, but not from skia.Image and skia.Surface. For example, skia.Image and skia.Surface implementations may defer pixel depth, so may not completely specify ImageInfo.

ImageInfo contains dimensions, the pixel integral width and height. It encodes how pixel bits describe alpha, transparency; color components red, blue, and green; and ColorSpace, the range and linearity of colors.

Properties§

Source@property def alpha_type(self, /) -> AlphaType§

Returns the alpha type.

Source@property def color_type(self, /) -> ColorType§

Returns the color type.

Source@property def height(self, /) -> int§

Returns the pixel row count.

Source@property def width(self, /) -> int§

Returns the pixel count in each row.

Methods§

Sourcedef compute_byte_size(self, /, row_bytes: int) -> int§

Returns the storage required by the pixel array, given ImageInfo dimensions, color type, and row_bytes. row_bytes is assumed to be at least skia.ImageInfo.min_row_bytes().

Returns zero if the height is zero. Returns int.MAX if the answer exceeds the range of int.

  • row_bytes size of the pixel row or larger
Sourcedef compute_offset(self, /, x: int, y: int, row_bytes: int) -> int§

Returns the byte offset of a pixel from the pixel base address.

Asserts in debug builds if point is outside of bounds. Does not assert if row_bytes is smaller than skia.ImageInfo.min_row_bytes(), even though the result may be incorrect.

  • row_bytes size of the pixel row or larger
@classmethod def make_a8(cls, /, width: int, height: int) -> ImageInfo§
@classmethod def make_n32_premul(cls, /, width: int, height: int) -> ImageInfo§
@classmethod def make_unknown(cls, /, width: int, height: int) -> ImageInfo§
Sourcedef with_alpha_type(self, /, new_alpha_type: AlphaType) -> ImageInfo§

Creates ImageInfo with the same color type, color space, width, and height, with the alpha type set to new_alpha_type.

The created ImageInfo contains new_alpha_type even if it is incompatible with the color type, in which case the alpha type in ImageInfo is ignored.

  • new_alpha_type new alpha type
Sourcedef with_color_type(self, /, new_color_type: ColorType) -> ImageInfo§

Creates ImageInfo with the same alpha type, color space, width, and height, with the color type set to new_color_type.

  • new_color_type new color type
Sourcedef with_dimensions(self, /, width: int, height: int) -> ImageInfo§

Creates ImageInfo with the same color type, color space, and alpha type, with dimensions set to new_dimensions.