Can not print image

[phongbm]

I meet a problem when printing an image using printer.image(Image) like sample code.
The output is like this:

Please help me fix it.
Thanks in advance!

[211277729]

我在使用 like sample code 打印图像时遇到问题。输出是这样的：请帮我修复它。提前致谢！printer.image(Image)

请转换为jpg格式的图片，就可以打印了，但是非常慢