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esdrasbeleza/lightest_excerpt.go

Last active August 29, 2015 14:20
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lightest() function
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lightest_excerpt.go
func (c LightestOperation) lightest(color1, color2 color.RGBA) color.Color {
if c.luminance(color1) > c.luminance(color2) {
return color1
} else {
return color2
}
}
func (c LightestOperation) luminance(someColor color.Color) uint32 {
r, g, b, _ := someColor.RGBA()
return uint32(0.2126*float32(r) + 0.7152*float32(g) + 0.0722*float32(b))
}
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