Reduce usages of Gosu.clip_to in Background

lib/cyberarm_engine/background.rb

@@ -21,19 +21,27 @@ module CyberarmEngine
     end
 
     def draw
-      Gosu.clip_to(@x, @y, @width, @height) do
+      if @angle.zero?
-        Gosu.draw_quad(
+        render
-          @top_left.x,     @top_left.y,     @paint.top_left,
+      else
-          @top_right.x,    @top_right.y,    @paint.top_right,
+        Gosu.clip_to(@x, @y, @width, @height) do
-          @bottom_right.x, @bottom_right.y, @paint.bottom_right,
+          render
-          @bottom_left.x,  @bottom_left.y,  @paint.bottom_left,
+        end
-          @z
-        )
       end
 
       debug_outline if @debug
     end
 
+    def render
+      Gosu.draw_quad(
+        @top_left.x,     @top_left.y,     @paint.top_left,
+        @top_right.x,    @top_right.y,    @paint.top_right,
+        @bottom_right.x, @bottom_right.y, @paint.bottom_right,
+        @bottom_left.x,  @bottom_left.y,  @paint.bottom_left,
+        @z
+      )
+    end
+
     def update
       @top_left.x     = @x
       @top_left.y     = @y
@@ -146,13 +154,3 @@ module CyberarmEngine
     end
   end
 end
-
-# Add <=> method to support Range based gradients
-# NOTE: Disabled, causes stack overflow 🙃
-# module Gosu
-#   class Color
-#     def <=>(_other)
-#       self
-#     end
-#   end
-# end