Transparent pixels are not transparent anymore when using color blend...

[BiggerWoo]

I compressed 0.png

original↑

compressed↑

and trying to do some color blend with it,
it works fine with src blend factor is "src_alpha"

but when I change it into "src_color"

looks like transparent pixels are not transparent anymore.
but wait! it still works fine with this

after compressed:

so what happend with 0.png?

pngquant -v:
pngquant, 2.12.0 (January 2018), by Kornel Lesinski, Greg Roelofs.
Color profiles are supported via Little CMS. Using libpng 1.6.35.
and with options:
--ext=.png --force --nofs --skip-if-larger --speed=1 --quality=65-80

by the way, if I remove option --nofs, the same problem occured with 1.png after compressed

and I done this in cocosCreator, but it's not cocosCreator's problem right? :)

[kornelski]

The images look fine outside of cocosCreator, so it is cocosCreator's problem. Please let them know they need to improve handling of PNG8 with tRNS chunk.

[BiggerWoo]

ok ,thanks~~