Reply To: OSSC for PCBs

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September 10, 2019 at 10:33 PM #27833
Harrumph
Participant

    Yes that’s not surprising when using 384×240 mode on a 320×240 game. Remember that optimized mode can only scale by pixel repetition, i.e. integer scaling.
    Since it then multiplies by 4x on the horizontal (i.e. vertical for a TATE game), but vertical by 5x, it will look squished compared to both original or square pixel 4:3.

    Original: 320*10/11 / 240 = 1.21 (this is what you see in generic mode)
    384×240 opt: 320*4 / 240*5 = 1.067, however your screen probably also stretches the 1536 width (height in this case) to 1600 so
    1.067* 1600/1536 = 1.11
    If your screen would accept 320×240 in 5x mode, aspect would of course be full 4:3
    320*5 / 240*5 = 1.33

    Exactly these disturbances to aspect ratio is why I don’t personally like optimized modes too much. 🙂