some .png image urls fail to display

[CondensedMilk7]

passing urls such as terminal_images https://flagcdn.com/w320/ge.png results in the following output:

▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▐▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▐▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖
▖▖▖▖▖▘▝▖▖▖▖▖▖▖▖▐▖▖▖▖▀▖▀▖▖▖▖▖▖▖▖▗▀▖▀▖▖▖▖▐▖▖▖▖▖▖▖▗▘▝▀▖▖▖▖
▖▖▖▖▖▝▘▖▖▖▖▖▖▖▖▐▖▖▖▖▖▀▖▖▖▖▖▖▖▖▖▖▖▀▖▖▖▖▖▐▖▖▖▖▖▖▖▖▝▘▖▖▖▖▖
▀▀▀▀▀▀▀▀▀▀▀▀▖▖▖▝▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▘▖▖▖▀▀▀▀▀▀▀▀▀▀▀▀
▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖
▀▀▀▀▀▀▀▀▀▀▀▀▖▖▖▗▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▖▖▖▖▀▀▀▀▀▀▀▀▀▀▀▀
▖▖▖▖▖▗▖▖▖▖▖▖▖▖▖▐▖▖▖▖▖▀▖▖▖▖▖▖▖▖▖▖▖▀▖▖▖▖▖▐▖▖▖▖▖▖▖▖▗▖▖▖▖▖▖
▖▖▖▖▘▖▗▘▖▖▖▖▖▖▖▐▖▖▖▖▀▖▀▘▖▖▖▖▖▖▖▝▀▖▀▖▖▖▖▐▖▖▖▖▖▖▖▝▖▗▀▖▖▖▖
▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▐▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖▐▖▖▖▖▖▖▖▖▖▖▖▖▖▖▖
aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖
aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖
aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖
aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖
aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖
aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖
aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖
aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖
aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖aN;NaN;NaNmaN;NaN;NaNm▖

The same endpoint with jpg however seems to work fine (such as https://flagcdn.com/w320/ge.jpg)

[mjrlowe]

Hmm, not sure what's causing this but I will try and look into it further.

[mjrlowe]

Fixed in version 3.1.0. The issue was that the PNG library I am using doesn't fully support PNGs with colour palettes (PLTE), so I have implemented the missing stuff myself.