On Sun, Aug 24, 2003 at 07:43:57PM -0400, David Dawes wrote: > On Sun, Aug 24, 2003 at 11:16:23PM +0200, Alexander Pohoyda wrote: > >David Dawes <[EMAIL PROTECTED]> writes: > > > >> >> >> Xinerama *hides* the fact that there are two heads, so there is no > >> >> >> way for the app to be told a different DPI debending which head it is > >> >> >> currently on - what should it be told if it is on both ? > >> >> > > >> >> >This is my point exactly. When I raised this issue it was not to elicit a > >> >> >"correct" solution, but rather to point out that the whole notion of DPI is > >> >> >nonsense WRT Xinerama/MergedFB. I would suggest this as a "correct-ish" > >> >> >solution: If Xinerama/MergedFB detects that both screens have nearly the > >> >> >same resolution (to within some configurable tolerance) then use the > >> >> >average of the two. Otherwise the user has to specify the DPI to use with > >> >> >the -dpi command line switch or some other mechanism. (Is there a DPI > >> >> >option in the XF86Config file?) It might be nice to be able to specify > >> >> >"use DPI from screen foo" in the ServerLayout section to simplify the > >> >> >process a bit. > >> >> > >> >> There is no DPI option in the XF86Config file, but one could be added. > >> > > >> >That's true, but we have DisplaySize property in the Monitor section. > >> > >> The -dpi command line option is global, applying to all screens. > > > >I see. Is it updated in the Xserver manual page? > >I have the old version which goes like this: > > -dpi resolution > > sets the resolution of the screen, in dots per > > inch. To be used when the server cannot determine > > the screen size from the hardware. > > I don't see how that description is inconsistent with what I said. > Maybe knowing how it works influences the way I read the description?
Notice that framebuffer scalling, as we discussed last year, might be a good solution to this kind of problems, altough not all graphic card support it. The idea is to use, either a common framebuffer, or at least framebuffer with corresponding dpi and such information, and then scale them to the appropriate size when passing the data to the ramdac/whatever is used to draw the image on the screen. Friendly, Sven Luther _______________________________________________ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
