rotation - rmagic 回転と背景色は黒

Question

img1 = Magick::Image.read("public/123.png").first
img1.background_color = "none"

img1.rotate!(30)
img1.write('test.png')

背景色は黒、透明度

誰か助けて？

Answer 1

img1 = Magick::Image.read("public/123.png").first
img1.background_color = "transparent"

img1.rotate!(30)
img1.write('test.png')