>On Mon, 11 Aug 2003, Eric Wong wrote: > >> Is there a way to invert _all_ colors displayed on an X server or at >> least everything on the normal[1] X11 (minus special layers like >> OpenGL >> and xv) display? >> >> I could write a script that does bitwise inverts on everything in my >> rgb.txt, but I'm sure enough apps/toolkits specify colors directly in >> RGB values to make it pointless. Images wouldn't be affected by the >> RGB >> change, either. >> >> Preferably, it would be possible to invert back-and-forth while the X >> server is running, maybe through an app along the lines of xgamma. >> I'd also prefer that it be done by the X server itself and not >> specific >> to a certain video card driver. >> >> If an existing method doesn't exist, could someone point me to where I >> should look in the X source and make the necessary changes? Thanks. >> >> Why I want this: >> >> I use X apps from a variety of GUI toolkits, and would rather just >> invert everything at the X server level than to configure them >> individually. There are also some colors hardcoded in apps; not to >> mention annoying web designers who make the outlines of images white >> since they assume everyone has a white background on their browser. > > > You probably want to play with XF86VidModeSetGammaRamp in the > x86VidMode extension. See /usr/include/X11/extensions/xf86vmode.h. > You can set an inverse ramp: light maps to dark, dark to light. > > Get the size of the array with XF86VidModeGetGammaRampSize then > load a gamma corrected lookup table of that size with > XF86VidModeSetGammaRamp. This might not change the video overlay > or the cursor on alot of the hardware, but should change everything > else. The array elements go from 0 (full dark) to 65535 (full > intensity).
Thank you. While searching for examples on how to use the XF86VidModeSetGammaRamp function, I came across this: http://xfree86.desiato.de/xfree86/pipermail/xpert/2001-November/012921.html `sgamma -b -1` already does exactly what I'm looking for. -- Eric Wong _______________________________________________ XFree86 mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xfree86
