+ best diff to user panel

scripts/gameplay.lua

@@ -34,7 +34,7 @@ function render(deltaTime)
 
     Banner.render(deltaTime);
 
-    UserPanel.render(deltaTime);
+    UserPanel.render(deltaTime, score, gameplay.scoreReplays[1]);
     SongPanel.render(deltaTime,
         gameplay.bpm,
         gameplay.hispeed,

scripts/gameplay/user_panel.lua

@@ -13,11 +13,45 @@ local idolFrameImage = gfx.CreateSkinImage("crew/frame.png", 0);
 
 local username  = game.GetSkinSetting('username') or '';
 
+local drawBestDiff = function (deltaTime, score, bestReplay)
+    if not bestReplay then return end
+
+    -- Calculate the difference between current and best play
+    local difference = score - bestReplay.currentScore
+    local prefix = "=" -- used to properly display negative values
+    
+    gfx.BeginPath()
+    gfx.FontSize(26)
+    
+    gfx.FillColor(255, 255, 255)
+    if difference < 0 then
+        -- If we're behind the best score, separate the minus sign and change the color
+        gfx.FillColor(255, 90, 70)
+        difference = math.abs(difference)
+        prefix = "-"
+        
+    elseif difference > 0 then
+        gfx.FillColor(120, 146, 218)
+        difference = math.abs(difference)
+        prefix = "+"
+    end 
+    
+    gfx.LoadSkinFont("Digital-Serial-Bold.ttf")
+    gfx.FontSize(26)
+    gfx.TextAlign(gfx.TEXT_ALIGN_LEFT + gfx.TEXT_ALIGN_MIDDLE)
+    gfx.Text(prefix, 130, 827)
+    gfx.Text(string.format("%04d", math.floor(difference/10000)), 150, 827)
+
+    local lastFourDigits = ((difference / 10000) - math.floor(difference / 10000))*10000
+    gfx.FontSize(22)
+    gfx.Text(string.format("%04d", math.floor(lastFourDigits)), 209, 829)
+end
+
 local tickTransitions = function (deltaTime)
     
 end
 
-local render = function (deltaTime)
+local render = function (deltaTime, score, bestReplay)
     tickTransitions(deltaTime)
 
     gfx.BeginPath();
@@ -60,6 +94,9 @@ local render = function (deltaTime)
     gfx.FontSize(26)
     gfx.Text(username, 150, 802);
 
+    -- Draw best score diff
+    drawBestDiff(deltaTime, score, bestReplay);
+
     -- Draw dan badge & volforce
     gfx.BeginPath();
     gfx.ImageRect(