2012-10-26 Uli Schlachter: > In the beginning, there was X11. X11 defined what I will call > "protocol screens". In this mode, only the mouse could move > between screens. You can even run different window managers on the > different screens. > > But people wanted to move windows between screens, so Xinerama is > created. To 'old' clients, Xinerama looks like a single, big > protocol screen. However, only parts of it are visible. You can > ask the Xinerama extension for which parts exactly are visible. > > Then came RANDR. RANDR doesn't really matter to this issue at all. > It just made dynamic configuration possible. With Xinerama, you > had to configure the layout before starting the server. RANDR > makes it possible to enable new screens at runtime.
I assume that the -s setting of xcalib operates on the "protocol screen", the I don't understand why only one screen is inverted, since they both belong to the same protocol screen. If RANDR uses the same screen notion as Xinerama it also should invert both, since both appear as a single one. > > Given that inversion is such a simple and basic operation, I > > wonder if there's likewise a simple solution (I already tried to > > flip over my monitor cable, but it won't fit ;). > > What exactly do you mean by "inversion" anyway? My only guess so > far is that you want to inverse colors (black becomes white, white > becomes black, gray stays gray), but I only guess this because of > xcalib. Exactly. > If I understand this correctly, then I didn't even know that X11 > can do so. I never heard about xcalib either (and I haven't ever > built and run xcalib). When I heard about the possibility if inverting a screen (or a single window) I thought of it as a useless cheap gimmick. But once discovered I have to admit that inverting is a very handy small tool. I have two use-cases: ∙ insane web designers which print white text on black background (often combined with a very thin font) ∙ reading PDFs in a dark environment. Usually I set my PDF reader to low-contrast (dark grey on light grey) for that, but some PDFs use white as background and then the inversion comes into play. Marco -- To unsubscribe, send mail to [email protected].
