Transparenter farbiger Hintergrund für Conky

Normalerweise kann Conky einen farbigen Hintergrund, echte Transparenz oder Pseudotransparenz nutzen, nicht gesetzte Farbe und Pseudotransparenz zugleich.

Wie man auf dem Bild sehen kann: Es geht doch beides. Dafür bindet man dieses lua-skript ein (via):

--[[
Background by londonali1010 (2009)
This script draws a background to the Conky window. It covers the whole of the Conky window, but you can specify rounded corners, if you wish.
To call this script in Conky, use (assuming you have saved this script to ~/scripts/):
    lua_load ~/scripts/draw_bg.lua
    lua_draw_hook_pre draw_bg
Changelog:
+ v1.0 -- Original release (07.10.2009)
]]
-- Change these settings to affect your background.
-- "corner_r" is the radius, in pixels, of the rounded corners. If you don't want rounded corners, use 0.
corner_r=10
-- Set the colour and transparency (alpha) of your background.
bg_colour=0x000000
bg_alpha=0.4
require 'cairo'
function rgb_to_r_g_b(colour,alpha)
    return ((colour / 0x10000) % 0x100) / 255., ((colour / 0x100) % 0x100) / 255., (colour % 0x100) / 255., alpha
end
function conky_draw_bg()
    if conky_window==nil then return end
    local w=conky_window.width
    local h=conky_window.height
    local cs=cairo_xlib_surface_create(conky_window.display, conky_window.drawable, conky_window.visual, w, h)
    cr=cairo_create(cs)
    
    cairo_move_to(cr,corner_r,0)
    cairo_line_to(cr,w-corner_r,0)
    cairo_curve_to(cr,w,0,w,0,w,corner_r)
    cairo_line_to(cr,w,h-corner_r)
    cairo_curve_to(cr,w,h,w,h,w-corner_r,h)
    cairo_line_to(cr,corner_r,h)
    cairo_curve_to(cr,0,h,0,h,0,h-corner_r)
    cairo_line_to(cr,0,corner_r)
    cairo_curve_to(cr,0,0,0,0,corner_r,0)
    cairo_close_path(cr)
    
    cairo_set_source_rgba(cr,rgb_to_r_g_b(bg_colour,bg_alpha))
    cairo_fill(cr)
end

Irgendwo gespeichert, z.B. in ~/scripts/conky_draw.lua,wird es dann in der ~/.conkyrc aufgerufen:

lua_load ~/scripts/conky-draw.lua
lua_draw_hook_pre draw_bg