Calculate size of resized image

calc_size.go

package main

import (
	"fmt"
	"math"
)

func CalcNewSize(w, h uint, maxW, maxH int32) (uint, uint) {
	haveF := float64(w) / float64(h)
	wantF := float64(maxW) / float64(maxH)
	if haveF < wantF {
		hh := float64(maxH)
		ww := math.Floor(haveF*hh + 0.5)
		return uint(ww), uint(hh)
	} else {
		ww := float64(maxW)
		hh := math.Floor(ww/haveF + 0.5)
		return uint(ww), uint(hh)
	}
}
func main() {
	fmt.Println(CalcNewSize(100, 150, 50, 60))
	fmt.Println("Hello, playground")
}