Reply To: A few feature requests for OSSC Pro (Updated March 27, 2025)

[Zacabeb]

16) Currently in scaler mode, the scanlines aren’t aligned with the pixels when using a non-integer scaling method, effectively breaking that feature.

This brings me back to suggestion #12. One way scanlines could be realized and properly aligned in scaler mode would be to have a 64-phase lookup table just like for scaling, but filled with a 2-tap scanline profile whose 0 coefficients are 180° out-of-phase with the scaling filters.

When scaling the picture, the appropriate phase scanline coefficient for the current line would be multiplied and/or summed with the target pixels after they have been derived by the scaling algorithm.

Alternatively, the LUT for the scaling algorithm could be pre-combined with the scanline LUT, making the latter be generated in the scaling process itself.

Together with multiple scanline LUTs stimulating different looks, this would allow fairly convincing CRT emulation. 🙂