awesomerc/theme/init.lua

local gfs = require 'gears.filesystem'

local config_dir = gfs.get_configuration_dir()
local theme_dir = config_dir .. 'theme/'
local assets_dir = theme_dir .. 'assets/'

local theme = {}

theme.border_color_normal = '#0000ff'

--- Wallpaper
theme.wallpaper = function (screen)
    local cairo = require('lgi').cairo
    local surface = require 'gears.surface'
    local wallpaper = require 'gears.wallpaper'

    local wallpaper_image_path = assets_dir .. 'wallpapers/pizza.jpg'

    local geom, cr = wallpaper.prepare_context(screen)
    -- local surf = cairo.ImageSurface.create(cairo.Format.RGB24, 200, 200)
    local surf = surface.load_uncached(wallpaper_image_path)
    local w, h = surface.get_size(surf)
    local aspect_w = geom.width / w
    local aspect_h = geom.height / h

    -- scall the surface to the screen dimenssion ignoring aspect ratio
    cr:scale(aspect_w, aspect_h)
    cr:set_source_surface(surf, 0, 0)
    cr:paint()

    -- Add colored layer
    local cm = cairo.LinearPattern(0, 0, w, h)
    cm:add_color_stop_rgba(0, 38/256, 50/256, 56/256, 0.2)
    cr:set_source(cm)
    cr:paint()

    -- Add vignette effect
    local linpat = cairo.LinearPattern(0, 0, w, h)
    linpat:add_color_stop_rgba(0, 0, 0, 0, 1)
    local radpat = cairo.RadialPattern(
        w / 2, h / 2, h * 0.5,
        w / 2, h / 2, w * 0.5)
    for i=0,1,0.1 do
        radpat:add_color_stop_rgba(i, 0, 0, 0, i/2)
    end
    cr:set_source(linpat)
    cr:mask(radpat)

    surf:finish()
end

return theme