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diff --git a/README.X11 b/README.X11 new file mode 100644 index 0000000..0df71a7 --- /dev/null +++ b/README.X11 @@ -0,0 +1,45 @@ +# +# $Id: README.X11,v 1.1 2000/03/28 08:48:33 reinelt Exp $ +# + +This is the README file for the X11 display driver for lcd4linux + +The driver opens a X11 window based on the geometry specified in the +config file. This window cannot be resized. The contents of the window +will be redrawn every 'tick' msec. + +The driver uses very low cpu time, and requires low bandwitdh, because +only modified pixels are redrawn. + + +Configuration: + +The driver needs/supports the following entries in lcd4linux.conf: + +Display: must be "X11" +size: [columns]x[rows], e.g. "20x4" +font: [xrex]x[yres], at the moment only "5x8" and "6x8" supported. +pixel: [pixelsize]+[pixelgap], e.g. "5+1" +gap: [row gap]x[column gap], e.g. "3x3" +border: border width +foreground: color of an active LCD Pixel, must be #rrggbb +halfground: color of an inactive LCD Pixel, must be #rrggbb +background: backlight color, must be #rrggbb + +This may look weird, but it is weird. Let's explain this a bit further: +The X11 driver tries to emulate a real LC display. A real LCD has a +size of columns*rows characters. Each character consists of xres*yres +LCD cells. One single cell will be represented by a rectangle of +pixelsize*pixelsize pixels. If you want to, you can emulate the gap +between this lcd cells by specifying a pixelgap greater than zero. +Sometimes there's a gap between characters, too. You can specify this +gap (in pixels again) horizontally and vertically. Usually this gap +is the same size as a cell (which is pixelsize+pixelgap). + +If you use a font of 5x8, some characters may use the first and the last +pixel. So you should specify a column gap, otherwise the caracters may +touch. On the other hand, the 6x8 font never uses the first pixel. So you +can omit the column gap, and will get the same text layout, but +uninterupted bars! + +After all: don't try to understand this unless you have tried it out! |