How to get the current texture data begin draw

[kazeno]

I trying to do a dump texture which works the same as Dolphin does.
Only when a texture is drawn in the game (like you said, figures out only when needed) it will dump a .png to the hdd if the file doesn't exist.

I already implemented the option to enable it in the main settings menu.
Now I'm trying to implement the feature.

The point where the texture is figured out could be a nice spot to do the dump.
I suppose I have to take the data with GetCurrentTexture and go through some png encoder.