SCALED flag does not scale mouse pos with OPENGL flag

[VantaTree]

Windows 11 SDL 2.0.22 Python 3.11.2 pygame-ce==2.1.3

pygame.init()
screen = pygame.display.set_mode((400,400), pygame.SCALED|pygame.OPENGL|pygame.DOUBLEBUF)

while True:

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            raise SystemExit
        if event.type == pygame.MOUSEMOTION:
            print(event.rel, event.pos)

    pygame.display.flip()

In the above example, the mouse pos isn't between (0, 0) and (400, 400). It's much Higher (815, 815). and (1535, 863) with FULLSCREEN flag.

[pmp-p]

Thhat could be an internal SDL problem or missing setting when using GL/GLES contexts, i have the exact same problem in Harfang3D which displays scaled and uses mouse from SDL2 (eg when used on wasm)

[pmp-p]

From a working Harfang fix ( handling mouse x/y ratio changes manually) : it seems that scaling event are not dispatched to SDL mouse handling code and it stays using original framebuffer size. Or maybe the SDL mouse handling code just ignore window viewport and size.