go get github.com/TheOnly92/sgreader

package main

import (
    "github.com/TheOnly92/sgreader"
)

func main() {
    file := sgreader.ReadFile("C3.sg2")
    err := file.Load()
    if err != nil {
        panic(err)
    }

    bitmaps := file.BitmapCount()
    fmt.Printf("Bitmaps: %d\n", bitmaps)
}