Module alpha_mask_u8 

Alpha masking with clipping support.

Port of agg_alpha_mask_u8.h — provides alpha mask functionality where pixel coverage values are modulated by a grayscale mask buffer.

Structs

AlphaMaskU8

Alpha mask with bounds-checked access to a rendering buffer.

AmaskNoClipU8

Alpha mask without bounds checking — faster but caller must ensure in-range.

OneComponentMask

Single-component mask: returns the first byte.

RgbToGrayMask

RGB-to-gray mask: weighted sum of R, G, B channels.

Traits

AlphaMask

Alpha mask interface for coverage modulation.

MaskFunction

Trait for computing a mask value from pixel data.

Type Aliases

AlphaMaskGray8

Gray8 alpha mask (1 byte per pixel, offset 0).

AlphaMaskRgb24b

RGB24 blue channel mask.

AlphaMaskRgb24g

RGB24 green channel mask.

AlphaMaskRgb24r

RGB24 red channel mask.

AlphaMaskRgba32a

RGBA32 alpha channel mask.

AlphaMaskRgba32b

RGBA32 blue channel mask.

AlphaMaskRgba32g

RGBA32 green channel mask.

AlphaMaskRgba32r

RGBA32 red channel mask.

AmaskNoClipGray8

Gray8 alpha mask, no clipping.

AmaskNoClipRgba32a

RGBA32 alpha channel mask, no clipping.