Titlescreen Letterboxing issue

Advanced OpenGL source port fork from ZDoom, picking up where ZDoomGL left off.
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mdmenzel
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Joined: Fri Jan 09, 2015 3:06

Titlescreen Letterboxing issue

Post by mdmenzel » Thu Mar 05, 2015 21:52

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?

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Rachael
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Joined: Sat May 13, 2006 10:30

Re: Titlescreen Letterboxing issue

Post by Rachael » Fri Mar 06, 2015 6:38

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.
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