How to open png and bmp pulled from game jars?

Question

Java

I decompiled the Deep 3D game (a game for feature phones) and noticed (it was hard not to notice) that the pictures do not open either with photo viewing programs or photo editors. How can they be opened?

ps (not much needed, but just interesting) And I also noticed characters incomprehensible to me in .lang files

screenshot (highlighted in red)

. Is it due to incorrect encoding? And is it worth paying attention to it?

Answer 1

Already found a solution. This is the program FishPic

Answer 2

that the pictures do not open either by photo viewing programs or by photo editors

so it's not png and not bmp. Either some kind of format, or some kind of encryption / encoding.
Nothing can be said without the files themselves.

And I also noticed characters incomprehensible to me in .lang files

Most likely a binary format. These characters look like a simple separator

Answer 3

the bytes in the pictures are rearranged backwards
if the bytes are reversed, then the file structure will already resemble png
why so, most likely the byte preparation is organized in this way
before loading the image into memory