Fixed Window dark mode issue for Windows 10 users! (#449)

* Added extras to NativeAPI.hx

-Added `setWindowBorderColor()`, `hasVersion()`, and `redrawWindowHeader`.

* Added `redrawWindowHeader` to Main.hx

* Added setWindowBorderColor

* Update NativeAPI.hx

* Update Main.hx

* Update Windows.hx

* Update NativeAPI.hx

* Update Windows.hx

* Update NativeAPI.hx

* Added FlxColorToArray to CoolUtil

-Added the FlxColorToArray function to CoolUtil so people can easily use FlxColors with functions like setWindowBorderColor and setWindowTitleColor.

* Update Windows.hx

* Fix Windows.hx

-You now have to use `FlxColor.fromRGB(255, 255, 254)` or 0xFFFFFFFE to set the border to normal

* Update Windows.hx

shhh

* Update NativeAPI.hx

* Small fixes

* small optimization

* eh imma add it here too

---------

Co-authored-by: Ne_Eo <NeeEoo@users.noreply.github.com>
Co-authored-by: ⍚~Nex <87421482+NexIsDumb@users.noreply.github.com>

source/funkin/backend/system/Main.hx

@@ -156,6 +156,9 @@ class Main extends Sprite
 		FlxG.signals.postStateSwitch.add(onStateSwitchPost);
 
 		FlxG.mouse.useSystemCursor = true;
+		#if DARK_MODE_WINDOW
+		if(funkin.backend.utils.NativeAPI.hasVersion("Windows 10")) funkin.backend.utils.NativeAPI.redrawWindowHeader();
+		#end
 
 		ModsFolder.init();
 		#if MOD_SUPPORT

source/funkin/backend/utils/NativeAPI.hx

@@ -3,6 +3,7 @@ package funkin.backend.utils;
 import funkin.backend.utils.native.*;
 import flixel.util.typeLimit.OneOfTwo;
 import flixel.util.typeLimit.OneOfThree;
+import flixel.util.FlxColor;
 
 /**
  * Class for functions that talk to a lower level than haxe, such as message boxes, and more.
@@ -84,12 +85,86 @@ class NativeAPI {
 		#end
 	}
 
+	/**
+	 * WINDOW COLOR MODE FUNCTIONS.
+	 */
+
+	/**
+	 * Switch the window's color mode to dark or light mode.
+	 */
 	public static function setDarkMode(title:String, enable:Bool) {
 		#if windows
+		if(title == null) title = lime.app.Application.current.window.title;
 		Windows.setDarkMode(title, enable);
 		#end
 	}
 
+	/**
+	 * Switch the window's color to any color.
+	 *
+	 * WARNING: This is exclusive to windows 11 users, unfortunately.
+	 *
+	 * NOTE: Setting the color to 0x00000000 (FlxColor.TRANSPARENT) will set the border (must have setBorder on) invisible.
+	 */
+	public static function setWindowBorderColor(title:String, color:FlxColor, setHeader:Bool = true, setBorder:Bool = true) {
+		#if windows
+		if(title == null) title = lime.app.Application.current.window.title;
+		Windows.setWindowBorderColor(title, [color.red, color.green, color.blue, color.alpha], setHeader, setBorder);
+		#end
+	}
+
+	/**
+	 * Resets the window's border color to the default one.
+	 *
+	 * WARNING: This is exclusive to windows 11 users, unfortunately.
+	**/
+	public static function resetWindowBorderColor(title:String, setHeader:Bool = true, setBorder:Bool = true) {
+		#if windows
+		if(title == null) title = lime.app.Application.current.window.title;
+		Windows.setWindowBorderColor(title, [-1, -1, -1, -1], setHeader, setBorder);
+		#end
+	}
+
+	/**
+	 * Switch the window's title text to any color.
+	 *
+	 * WARNING: This is exclusive to windows 11 users, unfortunately.
+	 */
+	public static function setWindowTitleColor(title:String, color:FlxColor) {
+		#if windows
+		if(title == null) title = lime.app.Application.current.window.title;
+		Windows.setWindowTitleColor(title, [color.red, color.green, color.blue, color.alpha]);
+		#end
+	}
+
+	/**
+	 * Resets the window's title color to the default one.
+	 *
+	 * WARNING: This is exclusive to windows 11 users, unfortunately.
+	**/
+	public static function resetWindowTitleColor(title:String) {
+		#if windows
+		if(title == null) title = lime.app.Application.current.window.title;
+		Windows.setWindowTitleColor(title, [-1, -1, -1, -1]);
+		#end
+	}
+
+	/**
+	 * Forces the window header to redraw, causes a small visual jitter so use it sparingly.
+	 */
+	public static function redrawWindowHeader() {
+		#if windows
+		flixel.FlxG.stage.window.borderless = true;
+		flixel.FlxG.stage.window.borderless = false;
+		#end
+	}
+
+	/**
+	 * Can be used to check if your using a specific version of an OS (or if your using a certain OS).
+	 */
+	public static function hasVersion(vers:String)
+		return lime.system.System.platformLabel.toLowerCase().indexOf(vers.toLowerCase()) != -1;
+
 	/**
 	 * Shows a message box
 	 */

source/funkin/backend/utils/native/Windows.hx

@@ -134,13 +134,57 @@ class Windows {
 		HWND window = FindWindowA(NULL, title.c_str());
 		// Look for child windows if top level aint found
 		if (window == NULL) window = FindWindowExA(GetActiveWindow(), NULL, NULL, title.c_str());
+		// If still not found, try to get the active window
+		if (window == NULL) window = GetActiveWindow();
+		if (window == NULL) return;
 
-		if (window != NULL && S_OK != DwmSetWindowAttribute(window, 19, &darkMode, sizeof(darkMode))) {
+		if (S_OK != DwmSetWindowAttribute(window, 19, &darkMode, sizeof(darkMode))) {
 			DwmSetWindowAttribute(window, 20, &darkMode, sizeof(darkMode));
 		}
+		UpdateWindow(window);
 	')
 	public static function setDarkMode(title:String, enable:Bool) {}
 
+	@:functionCode('
+	HWND window = FindWindowA(NULL, title.c_str());
+	if (window == NULL) window = FindWindowExA(GetActiveWindow(), NULL, NULL, title.c_str());
+	if (window == NULL) window = GetActiveWindow();
+	if (window == NULL) return;
+
+	COLORREF finalColor;
+	if(color[0] == -1 && color[1] == -1 && color[2] == -1 && color[3] == -1) { // bad fix, I know :sob:
+		finalColor = 0xFFFFFFFF; // Default border
+	} else if(color[3] == 0) {
+		finalColor = 0xFFFFFFFE; // No border (must have setBorder as true)
+	} else {
+		finalColor = RGB(color[0], color[1], color[2]); // Use your custom color
+	}
+
+	if(setHeader) DwmSetWindowAttribute(window, 35, &finalColor, sizeof(COLORREF));
+	if(setBorder) DwmSetWindowAttribute(window, 34, &finalColor, sizeof(COLORREF));
+
+	UpdateWindow(window);
+	')
+	public static function setWindowBorderColor(title:String, color:Array<Int>, setHeader:Bool = true, setBorder:Bool = true) {}
+
+	@:functionCode('
+	HWND window = FindWindowA(NULL, title.c_str());
+	if (window == NULL) window = FindWindowExA(GetActiveWindow(), NULL, NULL, title.c_str());
+	if (window == NULL) window = GetActiveWindow();
+	if (window == NULL) return;
+
+	COLORREF finalColor;
+	if(color[0] == -1 && color[1] == -1 && color[2] == -1 && color[3] == -1) { // bad fix, I know :sob:
+		finalColor = 0xFFFFFFFF; // Default border
+	} else {
+		finalColor = RGB(color[0], color[1], color[2]); // Use your custom color
+	}
+
+	DwmSetWindowAttribute(window, 36, &finalColor, sizeof(COLORREF));
+	UpdateWindow(window);
+	')
+	public static function setWindowTitleColor(title:String, color:Array<Int>) {}
+
 	@:functionCode('
 	// https://stackoverflow.com/questions/15543571/allocconsole-not-displaying-cout