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GLAMOR Acceleration Should Now Work With 30-Bit Deep Color Support

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  • GLAMOR Acceleration Should Now Work With 30-Bit Deep Color Support

    Phoronix: GLAMOR Acceleration Should Now Work With 30-Bit Deep Color Support

    GLAMOR as a means of providing 2D acceleration over OpenGL in X.Org Server 1.20 will support for 30-bit RGB colors...

    http://www.phoronix.com/scan.php?pag...lor-30-Support

  • #2
    Are 30bit displays detected automatically? Or do they require an xorg snippet?

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    • #3
      Originally posted by FireBurn View Post
      Are 30bit displays detected automatically? Or do they require an xorg snippet?
      The latter, or the -depth command line parameter.

      The former would be problematic at this point, since some apps can't handle 30-bit colours yet.

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      • #4
        I managed to also bisect some gnome on Wayland breakage to the enablement patch for 10 bit color in Mesa on my machine.

        RX580 on a 7 year old Dell 24" 1920x1200 panel, so I doubt it has 10 bit support without any dithering. Running stock Ubuntu 17.10 with the exception of an updated 4.15rc kernel and updated llvm/mesa

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        • #5
          Originally posted by Veerappan View Post
          I managed to also bisect some gnome on Wayland breakage to the enablement patch for 10 bit color in Mesa on my machine.

          RX580 on a 7 year old Dell 24" 1920x1200 panel, so I doubt it has 10 bit support without any dithering. Running stock Ubuntu 17.10 with the exception of an updated 4.15rc kernel and updated llvm/mesa
          10-bit displays have been around for quite a while. I think my HP zr30w is about that old, and it has 10-bit support. I'm sure some Dell screens from around that time had it too. Maybe dithered. That doesn't seem to bother a lot of people. Many displays are actually 6-bit and dither for 8-bit.

          Yes, I found the earliest Dell 10-bit monitor (I think) is the Dell U2410 and it uses A-FRC dithering to support 10-bit color.
          Last edited by Zan Lynx; 01-26-2018, 08:08 PM.

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          • #6
            Originally posted by Zan Lynx View Post

            10-bit displays have been around for quite a while. I think my HP zr30w is about that old, and it has 10-bit support. I'm sure some Dell screens from around that time had it too. Maybe dithered. That doesn't seem to bother a lot of people. Many displays are actually 6-bit and dither for 8-bit.

            Yes, I found the earliest Dell 10-bit monitor (I think) is the Dell U2410 and it uses A-FRC dithering to support 10-bit color.
            What I've got is an Ultrasharp U2412M, so you're probably right. I also hadn't remembered that this monitor had a display port output (bonus!). I do also have a 1080p Dell monitor plugged in next to it, and I'm not sure of that one's model number, but it is a cheaper panel that was retired from work.

            I hadn't realized that 10-bit support was available in panels that far back, but it's possible that my setup could have one 8 bit and one 10 bit panel messing things up.

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