Golang에서 이미지를 오버레이하고 회전하려면 어떻게 해야 합니까?

import (
    "image"
    "image/jpeg"
    "os"
    "code.google.com/p/graphics-go/graphics"
)

func main() {
    // Load the images
    img1, _, _ := image.Decode(os.Open("image1.jpg"))
    img2, _, _ = image.Decode(os.Open("image2.jpg"))

    // Create a new image canvas
    m := image.NewRGBA(image.Rect(0, 0, 800, 600))

    // Draw the background image
    draw.Draw(m, m.Bounds(), img1, image.Point{0, 0}, draw.Src)

    // Apply rotation to the second image
    graphics.Rotate(m, img2, &graphics.RotateOptions{Angle: 3.5})

    // Save the final image
    jpeg.Encode(os.Create("final-image.jpg"), m, &jpeg.Options{jpeg.DefaultQuality})
}