Color difference between pngquant 2.8 and pngquantjs demo

[yuyuyzl]

It seems the output of pngquantjs has a slight diffence in color compared to the original image(or the output from the binary version).

Tested with a solid color png.

Original

Compressed with pngquant 2.8 on macos

Compressed with pngquantjs

#FF99D5 -> #FF9FD3

[yuyuyzl]

As for gradient demo, the pngquantjs version looks a bit pale.

original

pngquant 2.8

pngquantjs

[yuyuyzl]

well, i removed the default args and give the pngquantjs a fresh run, seems it is
"Compiled with no support for color profiles."

so this would be the main problem

[yuyuyzl]

ok it is solved.
To avoid the color profile difference, we could use a separate decoder to decode the png file, and encode it as a non-color-profile png, then feed it into pngquantjs.
The decoder and encoder could be canvas