Add NineSlice and draw in main

main.lua

@@ -3,6 +3,7 @@ local Animator = require "animator"
 local Atlas = require "atlas"
 local Font = require "font"
 local MultiMenu = require "multimenu"
+local NineSlice = require "nine_slice"
 local Units = require "units"
 local push = require "lib/push"
 
@@ -30,6 +31,20 @@ function love.load()
 
   BlockyFont = Font(blockyFont, 8, 8, blockFontChars)
 
+  local uiAtlas = Atlas(love.graphics.newImage("assets/flat-ui.png"), 32, 32)
+
+  Window = NineSlice(uiAtlas, {
+    tl = 26,
+    top = 27,
+    tr = 28,
+    left = 50,
+    center = 51,
+    right = 52,
+    bl = 74,
+    bottom = 75,
+    br = 76,
+  })
+
   local options = {}
 
   for idx, unit in ipairs(Units) do
@@ -55,6 +70,7 @@ end
 function love.draw()
   push:start()
 
+  Window:draw(100, 100, 5, 5)
   BlockyFont:draw("Hello, world!")
   ActiveUnit:draw()
 

nine_slice.lua

@@ -0,0 +1,74 @@
+local Object = require "lib/classic"
+
+local NineSlice = Object:extend()
+
+function NineSlice:new(atlas, sprites)
+  self.atlas = atlas
+  self.sprites = sprites
+end
+
+function NineSlice:draw(x, y, width, height)
+  local function draw(sprite, tx, ty)
+    local atlas = self.atlas
+    local sw = atlas.sw
+    local sh = atlas.sh
+    local gx = x + tx * sw
+    local gy = y + ty * sh
+
+    if sprite then
+      love.graphics.draw(atlas.meshes[sprite], gx, gy)
+    else
+      love.graphics.rectangle("fill", gx, gy, sw, sh)
+    end
+  end
+
+  --common variables
+  local right = width - 1
+  local bottom = height - 1
+  local sprites = self.sprites
+
+  if width == 1 and height == 1 then
+    draw(sprites.only_center, 0, 0)
+  elseif width == 1 then
+    draw(sprites.vert_top, 0, 0)
+    draw(sprites.vert_bottom, 0, bottom)
+
+    for cy = 1, bottom - 1 do
+      draw(sprites.vert_center, 0, cy)
+    end
+  elseif height == 1 then
+    draw(sprites.hori_left, 0, 0)
+    draw(sprites.hori_right, right, 0)
+
+    for cx = 1, right - 1 do
+      draw(sprites.hori_center, cx, 0)
+    end
+  else
+    --draw corners
+    draw(sprites.tl, 0, 0)
+    draw(sprites.tr, right, 0)
+    draw(sprites.bl, 0, bottom)
+    draw(sprites.br, right, bottom)
+
+    --horizontal edges
+    for cx = 1, right - 1 do
+      draw(sprites.top, cx, 0)
+      draw(sprites.bottom, cx, bottom)
+    end
+
+    --vertical edges
+    for cy = 1, bottom - 1 do
+      draw(sprites.left, 0, cy)
+      draw(sprites.right, right, cy)
+    end
+
+    --draw center
+    for cx = 1, right - 1 do
+      for cy = 1, bottom - 1 do
+        draw(sprites.center, cx, cy)
+      end
+    end
+  end
+end
+
+return NineSlice