On Thu, 30 Oct 2003, Branden Robinson wrote: > On Wed, Oct 29, 2003 at 03:19:17PM -0500, Thomas Dickey wrote: > > > > at the moment I'm only interested in bug-fixes (not changing configuration > > > > around). As it's setup now, I think that a user can easily turn on the > > > > locale feature and experiment with it. (I just got some negative feedback > > > > regarding the blue/Dodger blue resource change - have to keep things from > > > > getting out of hand ;-) > > > > > > Yeah, people yelled at me about that too, but I stood my ground. > > > > it would be nice if I could (somehow) make the color map adapt dynamically > > to make everything get good contrast. Even the example that I got in > > feedback was still more readable than the darker blue on black. (Bear in > > mind that when I setup color resources in 1996/1997, the choice was for > > names that were present in X11R5 and X11R6 rgb.txt, since I didn't trust > > the numeric specifiers - and I was usually making white backgrounds). > > I don't know much about colorspace stuff, but I wonder if the text color > values could be converted to HVC (Hue/Value/Chroma) internally, compared > to the HVC value of the background, a useful adjustment made in that > space, and the text colors remapped. > > I am wondering if it is this simple:
It might be. When I added the code to (attempt to) keep the cursor color distinct from the background, I didn't notice anything that I could have used. But revisiting it, might see something to exploit. Anyway, right now my changes to xterm til XFree86 4.4 is out will be only essential fixes... > The background color is likely to have a V of close to 0 or close to 1. > (Most people have either very light or very dark backgrounds.) > > For each text color, > If background V is close to 0: > If text color V is < 0.5, set it to 1.0 - V. > If text color V is > 0.5, leave it alone. > If background V is close to 1: > If text color V is < 0.5, leave it alone. > If text color V is > 0.5, set it to 1.0 - V. > > A computer graphics professional, or anyone who actually understands > colorspaces, should be able to see any awful flaws in this immediately. ;-) -- Thomas E. Dickey http://invisible-island.net ftp://invisible-island.net -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
