[Timwi]

Why does the BMP file format store the image upside-down though?

[rasz]

IBM brain rot adopted by Microsoft.

Why are device-independent bitmaps upside down? Raymond Chen https://devblogs.microsoft.com/oldnewthing/20210525-00/?p=10...

I think you had to wait for WinG or maybe even DirectX to get normal 1:1 mapping.

OpenGL is so old it had same stupid ideas about coordinates.