shut stepmania up about multiple filenames warning

Themes/_fallback/Other/ScreenGameplaySyncMachine music.ssc

@@ -10,7 +10,7 @@
 #BACKGROUND:;
 #LYRICSPATH:;
 #CDTITLE:;
-#MUSIC:ScreenGameplaySyncMachine music.ogg;
+#MUSIC:_sync music.ogg;
 #OFFSET:-0.012;
 #SAMPLESTART:0.000;
 #SAMPLELENGTH:12.000;

Themes/_fallback/Scripts/02 Actor.lua

@@ -114,17 +114,32 @@ function Actor:FullScreen()
 end
 
 --[[ Typical background sizes:
-320x240 - DDR 1st-Extreme, most NVLM_ZK songs
+320x240 - [4:3]
-640x480 - most simfiles in distribution today are this big.
+640x480 - [4:3] (most simfiles in distribution today use this res.)
-768x480 - 16:10 aspect ratio backgrounds
+768x480 - [16:10]
-854x480 - pump it up pro
+854x480 - [16:9]
 ]]
--- "Most backgrounds are 640x480. Some are 768x480. Stretch the 4:3 ones."
 function Actor:scale_or_crop_background()
-	if (self:GetWidth() * 3) / 4 == self:GetHeight() then
+	local gw = self:GetWidth()
+	local gh = self:GetHeight()
+
+	local graphicAspect = gw/gh
+	local displayAspect = DISPLAY:GetDisplayWidth()/DISPLAY:GetDisplayHeight()
+
+	if graphicAspect == displayAspect then
+		-- bga matches the current aspect, we can stretch it.
 		self:stretchto( 0,0,SCREEN_WIDTH,SCREEN_HEIGHT );
 	else
+		-- temp
 		self:scaletocover( 0,0,SCREEN_WIDTH,SCREEN_HEIGHT );
+		--[[
+		-- bga doesn't match the aspect.
+		if displayAspect > graphicAspect then
+			-- the graphic is smaller than the display aspect ratio
+		else
+			-- the graphic is bigger than the display aspect ratio; crop me
+		end
+		--]]
 	end
 end