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mwichary's profile
Marcin Wichary
Marcin Wichary
Marcin Wichary
@mwichary

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Marcin Wichary

@mwichary

Writing a book about the history of keyboards: http://aresluna.org/shift-happens  · Design manager @figmadesign · Typographer · Occasional speaker · He/him

San Francisco, Calif.
Joined October 2009

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    1. foone‏ @Foone 4 Dec 2018
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      OK, so you know that classic Win95 "It's now safe to shutdown your computer" screen? It basically only existed because windows 95 needed to be shutdown (like all windowses) but win9x couldn't yet auto-power-off most systems.pic.twitter.com/UUoJWlOykU

      42 replies 356 retweets 1,222 likes
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    2. foone‏ @Foone 4 Dec 2018
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      It's stored in C:\WINDOWS\LOGOS.SYS, which is actually just a BMP file renamed. It's 256-color RLE BMP, but if you open it up, you'll get this:pic.twitter.com/skuKDg27Hy

      12 replies 19 retweets 143 likes
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    3. foone‏ @Foone 4 Dec 2018
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      Cause it turns out the file is 320x400, which is a fucking weird resolution. But it's a standard VGA resolution, and CRTs will scale it like it's the (more common) 640x400 resolution. So you'd get something more like this... almost.pic.twitter.com/bxSJEo1bKf

      7 replies 7 retweets 119 likes
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    4. foone‏ @Foone 4 Dec 2018
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      See, 640x400 (like the famous mode 13h's 320x200) is a 4:3 resolution. But 640/400 is 1.6, not 1.333. How's that work? Simple. The pixels aren't square!

      2 replies 3 retweets 74 likes
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    5. foone‏ @Foone 4 Dec 2018
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      Pixels in 320x400 are 1.67x wider than they are tall. So you get "fat pixels"

      4 replies 3 retweets 68 likes
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    6. foone‏ @Foone 4 Dec 2018
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      So the correct way to, uh, correct this pixel for how it would appear on a native CRT is to increase the width to 534, instead of 640. so instead of 320x400 -> 640x400, you get 534x400. That results in this, more or less. (I scaled it up for more quality)pic.twitter.com/dZtNs5nG7G

      2 replies 0 retweets 81 likes
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    7. Marcin Wichary‏ @mwichary 4 Dec 2018
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      Replying to @Foone

      Nit: This feels wrong in that I think you need to expand the shorter axis rather than contract the longer one. Contracting = 534x400 = you lose pixels. Expanding = 640x480 = no visual fidelity loss and I believe what the CRTs were doing.

      2 replies 0 retweets 2 likes
    8. foone‏ @Foone 4 Dec 2018
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      Replying to @mwichary

      I think that's what I am doing? I may not have explained it very well. The source picture is 320x400, and I'm just rescaling it out to 534x400. No pixels are lost, just some horizontal interpolation happens.

      1 reply 0 retweets 0 likes
      Marcin Wichary‏ @mwichary 4 Dec 2018
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      Replying to @Foone

      Yeah. I think I am wrong here. That’s probably literally what the CRT was doing. Sorry!

      5:20 PM - 4 Dec 2018
      • 1 Like
      • 🍀/usr/prism🍀
      2 replies 0 retweets 1 like
        1. New conversation
        2. foone‏ @Foone 4 Dec 2018
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          Replying to @mwichary

          CRTs work completely differently cause they're dark magic of not even having pixels, but expanding the horizontal was probably the cleanest way to fix it for modern screens :)

          1 reply 0 retweets 2 likes
        3. Marcin Wichary‏ @mwichary 4 Dec 2018
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          Replying to @Foone

          Not an expert on CRTs, but I think you did exactly what a CRT would have done! Just stretch out each scan line.

          0 replies 0 retweets 0 likes
        4. End of conversation
        1. Marcin Wichary‏ @mwichary 4 Dec 2018
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          Replying to @mwichary @Foone

          I think I’m just proving your point that 320x400 is weird in two separate ways and it’s hard to wrap one’s head around it. BTW I modified both windows start and shut down images with Pet Shoo Boys photos. :·)

          0 replies 0 retweets 2 likes
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