fftool

Documentation

Index

• func CoreAlphaLinear(_, y int, _, h int) (uint8, uint8, uint8, uint8)
• func GenMask(coref CoreFunc, width int, height int, outfile string) error
• func Inscribed[T constraints.Integer](outW, outH, w, h T) (T, T)
• func Position[T constraints.Integer](outW, outH, w, h, xp, yp T) (T, T)
• type CoreFunc

Functions

func CoreAlphaLinear

func CoreAlphaLinear(_, y int, _, h int) (uint8, uint8, uint8, uint8)

核函数：alpha线性渐变 offset：根据高度向下偏移 step：实际作用高度 maxAlpha：渐变时alpha最大值 return：rgba

func GenMask

func GenMask(coref CoreFunc, width int, height int, outfile string) error

func Inscribed

func Inscribed[T constraints.Integer](outW, outH, w, h T) (T, T)

内接

func Position

func Position[T constraints.Integer](outW, outH, w, h, xp, yp T) (T, T)

Types

type CoreFunc

type CoreFunc func(x, y int, w, h int) (r uint8, g uint8, b uint8, a uint8)