add(theme) Wallpaper

theme/init.lua

@@ -1,5 +1,52 @@
+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