For some GUI testes I draw some images in 2D mode to the screen.
They are scaled down and OpenGL filter these images very nice:

But in DirectX9 the same pictures are a little bit crispy:

I switched on Trilinear Filtering for DirectX9 and it helps a little bit (the pictures above use Trilinear Filtering), however it is still crispy compared to OpenGL.
Switching on other filters like Bilinear and Anisotropic does not help. Also Anti-Aliasing does not help.
Is there a DirectX expert that knows those issues? Is this normal for DirectX or is there any hidden feature I need to switch on to get nicely filtered images?
Btw: I disabled MipMaps for those pictures. Since they are rendered anyway without Z-Buffer, this should not be the issue.
Best regards,
Graf Zahl