feat: add a special menu background

sonic-radiance.love/game/modules/gui/menuback.lua

@@ -0,0 +1,51 @@
+local MenuBack = Object:extend()
+
+function MenuBack:new()
+    self.backx = 0
+    self.bordery = 0
+    self.turn = 0
+    self.back = love.graphics.newImage("assets/gui/back/background.png")
+    self.border = love.graphics.newImage("assets/gui/back/border.png")
+    self.emblem = love.graphics.newImage("assets/gui/back/emblem.png")
+
+    self.canvas = nil
+end
+
+
+function MenuBack:update(dt)
+    self.backx = (self.backx + dt * 20) % 96
+    self.bordery = (self.bordery + dt * 35) % 160
+    self.turn = self.turn + (dt/1.5) % 1
+
+    self.canvas = love.graphics.newCanvas( 424, 240 )
+    love.graphics.setCanvas(self.canvas)
+    for i = 0, (math.ceil(424/96)), 1 do
+        for j = 0, (math.ceil(240/96)), 1 do
+            love.graphics.draw(self.back, self.backx + ((i - 1 ) * 96), self.backx + ((j - 1 ) * 96))
+        end
+    end
+
+    for j = 0, (math.ceil(240/160)), 1 do
+        love.graphics.draw(self.border, 0, self.bordery + ((j - 1) * 160))
+    end
+    love.graphics.draw(self.emblem, 424, 240 - 32, self.turn, 0.8, 0.8, 200, 200)
+    love.graphics.setColor(1, 1, 1, 0.85)
+    love.graphics.rectangle("fill", 0, 0, 424, 240)
+    love.graphics.setColor(1, 1, 1, 1)
+
+    love.graphics.setCanvas()
+
+end
+
+
+function MenuBack:draw()
+    love.graphics.setColor(1, 1, 1, 1)
+    love.graphics.setBlendMode("multiply", "premultiplied")
+    if (self.canvas ~= nil) then
+        love.graphics.draw(self.canvas, 0, 0)
+    end
+    love.graphics.setBlendMode("alpha")
+    love.graphics.setColor(1, 1, 1, 1)
+end
+
+return MenuBack