Titlescreen Letterboxing issue

[mdmenzel]

I'm not sure if I should post this on bugs or not. I noticed that when I run GZDoom in a non-8:5/4:3 aspect ratio, the letterboxing that appears on the title and intermission screens seems to be incorrect. My screen is 1024x600, so I have GZDoom [1.8.6] set to that ratio. Given that the mode 13h corrected image would be scaled to 800x600, one would presume a horizontal letterboxing of 112 pixels per side [(1024-800)/2]. The actual horizontal letterboxing is 117 pixels per side, so 10 pixels of the image are cut off. Is there a mathematics issue in the code that centers the image?

[Rachael]

Does this happen in ZDoom?

Also 1024x600 is not a perfect 16:10 or 16:9 mode, it rests somewhere in between, so ZDoom and GZDoom is most likely assuming your display is 16:9 and scaling it accordingly. They will not conform your aspect ratio to exactly the same setting as your actual monitor if your monitor offers such an odd and non-standard mode.