NDS Stylus Input Display script improvements and warnings

Assets/Lua/NDS/StylusInputDisplay.lua

@@ -5,6 +5,28 @@ local downColor = 'red'
 local dotColor = 'blue'
 
 client.setwindowsize(client.getwindowsize()) -- assert a sane resolution
+console.writeline("Window size must be at an integer scale for this script to work, this will be asserted now and for screen layout changes")
+console.writeline("WARNING! Using a higher than support window size for your monitor may cause this script to fail! (e.g. 1980x1080 cannot go past 2x window size) Keep the window size to your resolution!"
+
+local prevScreenLayout = nds.getscreenlayout()
+
+function ResolveSettingIssuesIfNeeded()
+	local screenLayout = nds.getscreenlayout()
+	if screenLayout == "Horizontal" and not nds.getscreeninvert() then
+		console.writeline("Non-inverted horizontal screens are unsupported, switching to inverted screens")
+		nds.setscreeninvert(true)
+	end
+	if nds.getscreengap() ~= 0 then
+		console.writeline("Non-zero screen gap is unsupported, setting screen gap to 0 and asserting window size")
+		nds.setscreengap(0)
+		client.setwindowsize(client.getwindowsize())
+	end
+	if prevScreenLayout ~= screenLayout then
+		console.writeline("screen layout changed, asserting window size")
+		client.setwindowsize(client.getwindowsize())
+		prevScreenLayout = screenLayout
+	end
+end
 
 function Draw(x, y, maxX, maxY, isDown)
 	color = upColor
@@ -38,6 +60,8 @@ while true do
 		console.log('This script is for Nintendo DS only')
 		break
 	end
+
+	ResolveSettingIssuesIfNeeded()
 	
 	local btns = joypad.get()
 	
@@ -45,34 +69,23 @@ while true do
 		btns = movie.getinput(emu.framecount() - 1)
 	end
 
-	local invert = nds.getscreeninvert()
-	local wsz = client.getwindowsize()
 	local xo = 0
 	local yo = 0
 
 	if nds.getscreenlayout() == "Horizontal" then
-		if invert then
-			xo = xo - 256
-		else
-			console.writeline("Non-inverted horizontal screens are unsupported, switching to inverted screens")
-			nds.setscreeninvert(true)
-			xo = xo - 256
-		end
-	else -- vertical
-		if invert then
-			yo = yo - 192
-		else
-			-- don't need to do anything here
-		end
+		xo = -256
+	elseif nds.getscreeninvert() then
+		yo = -192
 	end
 
 	local x = btns['Touch X'] + xo
 	local y = btns['Touch Y'] + yo
 	local isDown = btns['Touch']
 
-	pts = client.transformPoint(x, y)
+	local pts = client.transformPoint(x, y)
 	local tx = pts["x"];
 	local ty = pts["y"];
+	local wsz = client.getwindowsize()
 	Draw(tx / wsz, ty / wsz, 10000, 10000, isDown)
 
 	emu.yield()