Bigterm slideshow, etc

bigterm.lua

@@ -196,7 +196,19 @@ local BigTerm = {
 
 }
 
-return function(monitors, args)
+local lib = {}
+function lib.fromFile(conf)
+    local fp = assert(io.open(conf, "r"))
+    local conf = textutils.unserializeJSON(fp:read("a"))
+    fp:close()
+    local monitors = {}
+    for addr, pos in pairs(conf.monitors) do
+        local p = assert(peripheral.wrap(addr))
+        table.insert(monitors, { p = p, x = pos.x, y = pos.y })
+    end
+    return lib.new(monitors, { palette = conf.palette, scale = conf.scale })
+end
+function lib.new(monitors, args)
     args = args or {}
     local mon = setmetatable({
             _monitors = monitors,
@@ -215,3 +227,5 @@ return function(monitors, args)
     mon._reset()
     return mon
 end
+
+return lib

btccshow.lua

@@ -0,0 +1,26 @@
+local args = { ... }
+local ccpi = require("ccpi")
+local bigterm = require("bigterm").fromFile("/bigterm.json")
+
+local img, err = ccpi.load(args[1])
+if not img then
+    printError(err)
+    return
+end
+
+local ys = {}
+for y = 1, img.h do table.insert(ys, y) end
+
+for i = 1, math.floor((#ys) / 2), 2 do
+    local a, b = i, (#ys - 1) - i + 1
+    ys[a], ys[b] = ys[b], ys[a]
+end
+
+for i, y in ipairs(ys) do
+    bigterm.setCursorPos(1, y)
+    bigterm.blit(img.lines[y].s, img.lines[y].fg, img.lines[y].bg)
+end
+
+for i = 1, 16 do
+    bigterm.setPaletteColor(bit.blshift(1, i - 1), img.palette[i])
+end

btccslideshow.lua

@@ -0,0 +1,47 @@
+local args = { ... }
+local ccpi = require("ccpi")
+local bigterm = require("bigterm")
+
+local conf_path = "/bigterm.json"
+if args[1] == "-c" then
+    table.remove(args, 1)
+    conf_path = table.remove(args, 1)
+end
+local screen = bigterm.fromFile(conf_path)
+
+local time = 10
+if args[1] == "-t" then
+    table.remove(args, 1)
+    time = tonumber(table.remove(args, 1))
+end
+
+local files = fs.list(args[1])
+
+while true do
+    local img, err = ccpi.load(fs.combine(args[1], files[math.random(1, #files)]))
+    if not img then
+        printError(err)
+        return
+    else
+        local ys = {}
+        for y = 1, img.h do table.insert(ys, y) end
+
+        for i = 1, math.floor((#ys) / 2), 2 do
+            local a, b = i, (#ys - 1) - i + 1
+            ys[a], ys[b] = ys[b], ys[a]
+        end
+
+        for i, y in ipairs(ys) do
+            screen.setCursorPos(1, y)
+            screen.blit(img.lines[y].s, img.lines[y].fg, img.lines[y].bg)
+            if (i % 10) == 0 then
+                os.sleep(0)
+            end
+        end
+
+        for i = 1, 16 do
+            screen.setPaletteColor(bit.blshift(1, i - 1), img.palette[i])
+        end
+    end
+    os.sleep(time)
+end