Rendering unusual native resolutions (non 640x480)

[Senryoku]

The current renderer always renders at 640x480, but the DC natively supports other output resolutions.

Some example of 320x240 games:

• The King Of Fighters: Dream Match 1999
• The King of Fighters 99 Evolution
• Last Blade 2 (Bakumatsu Roman Daini Maku - Gekka no Kenshi)

A bunch of 640x480 games (mostly 2D fighting games) exhibit some issues with upscaling: Rounding pixel coordinates after upscaling leads to gaps between sprites. I think this will be difficult to fix without game specific hacks.

I suspect the visual artifacts of previously mentioned 320x240 games have a similar origin, but in this case rendering at the expected resolution should get rid of it - it's just not currently possible.

[Immersion95]

At the moment, I can only boot KOF99 Evolution.

The game works, but it runs at 50 Hz instead of 60 Hz, and it displays too much of the bottom of the screen.

It seems that the emulator may be detecting the game as a PAL version, using PAL settings (50 Hz, 720×576) instead of NTSC (60 Hz, 720×480), which could explain the incorrect screen positioning.

[Immersion95]

I tested KOF Dream Match and I encounter this exact problem :