Integer to RGBA in Golang — Similar to C/C++

int_to_rgba.go

package main

import "fmt"

func main() {
	red := int(0xFF0000FF)
	green := int(0x00FF00FF)
	blue := int(0x0000FFFF)

	redHex, greenHex, blueHex, alphaHex := calcColor(red)

	fmt.Println("Red:")
	fmt.Printf("R: %d, G: %d, B: %d, A: %d\n", redHex, greenHex, blueHex, alphaHex)
	fmt.Println()

	redHex, greenHex, blueHex, alphaHex = calcColor(green)

	fmt.Println("Green:")
	fmt.Printf("R: %d, G: %d, B: %d, A: %d\n", redHex, greenHex, blueHex, alphaHex)
	fmt.Println()

	redHex, greenHex, blueHex, alphaHex = calcColor(blue)

	fmt.Println("Blue:")
	fmt.Printf("R: %d, G: %d, B: %d, A: %d\n", redHex, greenHex, blueHex, alphaHex)
}

func calcColor(color int) (red, green, blue, alpha int) {
	alpha = color & 0xFF
	blue = (color >> 8) & 0xFF
	green = (color >> 16) & 0xFF
	red = (color >> 24) & 0xFF

	return red, green, blue, alpha
}