color

func BoundToGamutXY ¶

func BoundToGamutXY(x, y, rx, ry, gx, gy, bx, by float64) (cx, cy float64)

BoundToGamutXY compares the point x,y to the triangle formed by rx,ry, gx,gy, bx,by. If the point falls within the triangle, x and y are returned. If the point falls outside the triangle, the x and y value of the nearest point on the triangle is returned.

func CtoRGB ¶

func CtoRGB(c uint32) (r, g, b float64)

CtoRGB converts a 24 bit RGB value stored in the least significant bits of a uint32 to float64 values on the range of 0.0 to 1.0

func CtoTermBG ¶

func CtoTermBG(c uint32, s string) string

CtoTermBG wraps s to set the terminal background color to the 24 bit RGB value of c

func CtoTermFG ¶

func CtoTermFG(c uint32, s string) string

CtoTermFG wraps s to set the terminal foreground color to the 24 bit RGB value of c

func HSVtoRGB ¶

func HSVtoRGB(h, s, v float64) (r, g, b float64)

HSVtoRGB converts hue, saturation and brightness values on the range of 0.0 to 1.0 to RGB floating point values on the range of 0.0 to 1.0

func RGBtoC ¶

func RGBtoC(r, g, b float64) (c uint32)

RGBtoC converts r, g, and b float64 values on the range of 0.0 to 1.0 to a 24 bit RGB value stored in the least significant bits of a uint32. The inputs are clamped to the range of 0.0 to 1.0

func RGBtoHSV ¶

func RGBtoHSV(r, g, b float64) (h, s, v float64)

RGBtoHSV converts red, green, and blue floating point values on the range 0.0 to 1.0 to hue, saturation and brightness values on the range 0.0 to 1.0

func RGBtoXYB ¶

func RGBtoXYB(r, g, b float64) (x, y, bri float64)

RGBtoXYB converts red, green, and blue floating point values on the range 0.0 to 1.0 to CIE colorspace x, y, and brightness values on the range 0.0 to 1.0 using Phillips Wide RGB D65 conversion.

func XKCD ¶

func XKCD(s string) (uint32, bool)

func XYBtoRGB ¶

func XYBtoRGB(x, y, bri float64) (r, g, b float64)

XYBtoRGB converts CIE colorspace x, y, and brightness values on the range 0.0 to 1.0 to red, green, and blue floating point values on the range 0.0 to 1.0 using Phillips Wide RGB D65 conversion.