That'll be 1.2.2, thanks.

libmulti.gms2/objects/obj_libmulti_test/Create_0.gml

@@ -13,6 +13,13 @@ window_set_size(640, 240);
 //alarm[0] = 15; // window_center() delay
 
 wndclass = libmulti_init();
+
+// GMS 2 is using RGBA pixel format instead of BGRA.
+libmulti_set_gms2_pixel_format(true);
+if (libmulti_get_gms2_pixel_format()) {
+	show_debug_message("libmulti: gms2 pixel format enabled ok!");
+}
+
 libmulti_set_game_window(window_handle());
 
 seed = randomize();

libmulti.gms2/objects/obj_libmulti_test/Draw_0.gml

@@ -56,7 +56,7 @@ for (var i = 0; i < ds_list_size(windows); i++) {
     
     xx = 8;
     yy = 8 + 64 + 8;
-    draw_set_color(c_black);
+    draw_set_color(c_red);
     str = "a libmulti window, window id: " + string(_w) + nl
     + "x: " + string(wx) + nl
     + "y: " + string(wy) + nl

libmulti.gms23/objects/obj_libmulti_test/Create_0.gml

@@ -13,6 +13,13 @@ window_set_size(640, 240);
 //alarm[0] = 15; // window_center() delay
 
 wndclass = libmulti_init();
+
+// GMS 2 is using RGBA pixel format instead of BGRA.
+libmulti_set_gms2_pixel_format(true);
+if (libmulti_get_gms2_pixel_format()) {
+	show_debug_message("libmulti: gms2 pixel format enabled ok!");
+}
+
 libmulti_set_game_window(window_handle());
 
 seed = randomize();

libmulti.gms23/objects/obj_libmulti_test/Draw_0.gml

@@ -58,7 +58,7 @@ for (var i = 0; i < ds_list_size(windows); i++) {
     
     xx = 8;
     yy = 8 + 64 + 8;
-    draw_set_color(c_black);
+    draw_set_color(c_red);
     str = "a libmulti window, window id: " + string(_w) + nl
     + "x: " + string(wx) + nl
     + "y: " + string(wy) + nl

libmulti.gmx/extensions/libmulti.extension.gmx

@@ -1,7 +1,7 @@
 <!--This Document is generated by GameMaker, if you edit it by hand then you do so at your own risk!-->
 <extension>
   <name>libmulti</name>
-  <version>1.3</version>
+  <version>1.2.2</version>
   <packageID></packageID>
   <ProductID></ProductID>
   <date>05/05/21</date>
@@ -68,6 +68,26 @@
           <argCount>0</argCount>
           <args/>
         </function>
+        <function>
+          <name>libmulti_set_gms2_pixel_format</name>
+          <externalName>libmulti_set_gms2_pixel_format</externalName>
+          <kind>1</kind>
+          <help>libmulti_set_gms2_pixel_format(truefalse) -&gt;real  :  Enables or disables GMS 2 pixel format.</help>
+          <returnType>2</returnType>
+          <argCount>1</argCount>
+          <args>
+            <arg>2</arg>
+          </args>
+        </function>
+        <function>
+          <name>libmulti_get_gms2_pixel_format</name>
+          <externalName>libmulti_get_gms2_pixel_format</externalName>
+          <kind>1</kind>
+          <help>libmulti_get_gms2_pixel_format() -&gt;real  :  Returns if the GMS 2 pixel format is enabled or not.</help>
+          <returnType>2</returnType>
+          <argCount>0</argCount>
+          <args/>
+        </function>
         <function>
           <name>libmulti_quit</name>
           <externalName>libmulti_quit</externalName>

libmulti.gmx/objects/obj_libmulti_test.object.gmx

@@ -424,7 +424,7 @@ for (var i = 0; i < ds_list_size(windows); i++) {
 
     xx = 8;
     yy = 8 + 64 + 8;
-    draw_set_color(c_black);
+    draw_set_color(c_red);
     str = "a libmulti window, window id: " + string(_w) + nl
     + "x: " + string(wx) + nl
     + "y: " + string(wy) + nl

libmulti/MultiD2D.cpp

@@ -62,7 +62,7 @@ void CMultiD2D::Discard() {
 	this->leave();
 }
 
-HRESULT CMultiD2D::Create(HWND window) {
+HRESULT CMultiD2D::Create(HWND window, bool altrgbmode) {
 	HRESULT hR = S_OK;
 	FLOAT dpiX = 0.0f, dpiY = 0.0f;
 
@@ -73,7 +73,7 @@ HRESULT CMultiD2D::Create(HWND window) {
 		RECT rc;
 		GetClientRect(window, &rc);
 		D2D1_SIZE_U size = D2D1::SizeU(rc.right - rc.left, rc.bottom - rc.top);
-		hR = ms_Factory->CreateHwndRenderTarget(D2D1::RenderTargetProperties(), D2D1::HwndRenderTargetProperties(window, size), &this->m_rt);
+		hR = ms_Factory->CreateHwndRenderTarget(D2D1::RenderTargetProperties(D2D1_RENDER_TARGET_TYPE::D2D1_RENDER_TARGET_TYPE_HARDWARE), D2D1::HwndRenderTargetProperties(window, size), &this->m_rt);
 	}
 	ms_Factory->GetDesktopDpi(&dpiX, &dpiY);
 	LeaveFactory();
@@ -85,8 +85,8 @@ HRESULT CMultiD2D::Create(HWND window) {
 			D2D1_BITMAP_PROPERTIES props;
 			props.dpiX = dpiX;
 			props.dpiY = dpiY;
-			props.pixelFormat.alphaMode = D2D1_ALPHA_MODE::D2D1_ALPHA_MODE_PREMULTIPLIED;
-			props.pixelFormat.format = DXGI_FORMAT::DXGI_FORMAT_B8G8R8A8_UNORM;
+			props.pixelFormat.alphaMode = D2D1_ALPHA_MODE::D2D1_ALPHA_MODE_IGNORE;
+			props.pixelFormat.format = altrgbmode ? DXGI_FORMAT::DXGI_FORMAT_R8G8B8A8_UNORM : DXGI_FORMAT::DXGI_FORMAT_B8G8R8A8_UNORM;
 			hR = this->m_rt->CreateBitmap(bmsize, this->m_bitmapP, this->m_bitmapW * 4, props, &this->m_bitmap);
 		}
 		else {

libmulti/MultiD2D.h

@@ -24,7 +24,7 @@ class CMultiD2D {
 	CMultiD2D();
 	~CMultiD2D();
 
-	HRESULT Create(HWND window);
+	HRESULT Create(HWND window, bool altrgbmode);
 	void Discard(); // Releases all resources EXCEPT for the user defined bitmap.
 	HRESULT OnResize(UINT w, UINT h);
 	HRESULT OnRender();

libmulti/legacy_extmaker_def.txt

@@ -46,4 +46,9 @@ function libmulti_get_max_height(window:real):real
 function libmulti_mouse_get_x(window:real):real
 function libmulti_mouse_get_y(window:real):real
 function libmulti_legacy_check():real
-function libmulti_legacy_dispatch():string
+function libmulti_legacy_done():real
+function libmulti_legacy_event_length():real
+function libmulti_legacy_event_is_string(index:real):real
+function libmulti_legacy_event_value_name(index:real):string
+function libmulti_legacy_event_value_real(index:real):real
+function libmulti_legacy_event_value_string(index:real):string

libmulti/libmulti.cpp

@@ -10,6 +10,8 @@ std::vector<std::pair<HWND, CMultiD2D*>> vecWindows{ };
 DWORD LastError{ ERROR_SUCCESS };
 static char* LastString{ nullptr };
 static CRITICAL_SECTION* Mutex{ nullptr };
+static bool IsLegacy{ false };
+bool AltRGBMode{ false };
 
 void EnterVector() { EnterCriticalSection(Mutex); }
 void LeaveVector() { LeaveCriticalSection(Mutex); }
@@ -118,10 +120,10 @@ static bool _winapi_gm_paste_event(HWND hWnd, double window) {
 		if (ok == TRUE) {
 			clipdata = reinterpret_cast<LPCWSTR>(GetClipboardData(CF_UNICODETEXT));
 			if (clipdata != nullptr) {
-				need = WideCharToMultiByte(CP_UTF8, 0, clipdata, -1, nullptr, 0, nullptr, nullptr);
+				need = WideCharToMultiByte(IsLegacy ? CP_OEMCP : CP_UTF8, 0, clipdata, -1, nullptr, 0, nullptr, nullptr);
 				if (need > 0) {
 					mbclipdata = new char[need];
-					need = WideCharToMultiByte(CP_UTF8, 0, clipdata, -1, mbclipdata, need, nullptr, nullptr);
+					need = WideCharToMultiByte(IsLegacy ? CP_OEMCP : CP_UTF8, 0, clipdata, -1, mbclipdata, need, nullptr, nullptr);
 				}
 			}
 			ok = CloseClipboard();
@@ -205,7 +207,7 @@ static LRESULT WINAPI WindowProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lPar
 			WCHAR wch = static_cast<WCHAR>(wParam);
 			// process exactly one character.
 			// size - 1 because the function won't handle a null byte.
-			WideCharToMultiByte(CP_UTF8, 0, &wch, 1, mch, sizeof(mch) - 1, nullptr, nullptr);
+			WideCharToMultiByte(IsLegacy ? CP_OEMCP : CP_UTF8, 0, &wch, 1, mch, sizeof(mch) - 1, nullptr, nullptr);
 
 			double w_char = static_cast<double>(wParam);
 			// me can't do bit arithmetic so there we go:
@@ -261,7 +263,7 @@ static LRESULT WINAPI WindowProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lPar
 		}
 
 		case WM_PAINT: {
-			d2d->Create(hWnd);
+			d2d->Create(hWnd, AltRGBMode);
 			d2d->OnRender();
 			ValidateRect(hWnd, nullptr);
 			break;
@@ -394,13 +396,15 @@ dllx double libmulti_init() {
 	InitMultiD2D();
 	EnterVector();
 	nikWindowClass = register_window_class(WindowProc);
+	libmulti_cursor_init();
 	LeaveVector();
 
 	// RegisterCallbacks wasn't called? Are we in legacy GM?
-	if (CBCreateDsMap == nullptr) {
+	if (CBCreateDsMap == nullptr && CBDispatch == nullptr && CBDsMapAddReal == nullptr && CBDsMapAddString == nullptr) {
 		CBCreateDsMap = libmulti_legacy_create_ds_map;
 		CBDispatch = libmulti_legacy_dispatch_stub;
 		// initialize a custom event system
+		IsLegacy = true;
 		libmulti_legacy_mutex_init();
 		// overmars why
 	}
@@ -448,9 +452,9 @@ dllx char* libmulti_last_error_message() {
 
 	_libmulti_free();
 
-	int needed = WideCharToMultiByte(CP_UTF8, 0, err, -1, nullptr, 0, nullptr, nullptr);
+	int needed = WideCharToMultiByte(IsLegacy ? CP_OEMCP : CP_UTF8, 0, err, -1, nullptr, 0, nullptr, nullptr);
 	LastString = new char[needed];
-	needed = WideCharToMultiByte(CP_UTF8, 0, err, -1, LastString, needed, nullptr, nullptr);
+	needed = WideCharToMultiByte(IsLegacy ? CP_OEMCP : CP_UTF8, 0, err, -1, LastString, needed, nullptr, nullptr);
 	LastError = GetLastError();
 	LocalFree(err);
 	err = nullptr;
@@ -576,9 +580,9 @@ dllx double libmulti_set_caption(double index, char* _name) {
 			LastError = GetLastError();
 		}
 		else {
-			int needed = MultiByteToWideChar(CP_UTF8, 0, _name, -1, nullptr, 0);
+			int needed = MultiByteToWideChar(IsLegacy ? CP_OEMCP : CP_UTF8, 0, _name, -1, nullptr, 0);
 			LPWSTR wide = new WCHAR[needed];
-			MultiByteToWideChar(CP_UTF8, 0, _name, -1, wide, needed);
+			MultiByteToWideChar(IsLegacy ? CP_OEMCP : CP_UTF8, 0, _name, -1, wide, needed);
 			BOOL ok = SetWindowText(window, wide);
 			LastError = GetLastError();
 			delete[] wide;
@@ -602,9 +606,9 @@ dllx char* libmulti_get_caption(double index) {
 			int copied = GetWindowTextW(window, buf, chars + 1);
 			LastError = GetLastError();
 			if (chars == copied) {
-				int need = WideCharToMultiByte(CP_UTF8, 0, buf, -1, nullptr, 0, nullptr, nullptr);
+				int need = WideCharToMultiByte(IsLegacy ? CP_OEMCP : CP_UTF8, 0, buf, -1, nullptr, 0, nullptr, nullptr);
 				LastString = new char[need];
-				copied = WideCharToMultiByte(CP_UTF8, 0, buf, -1, LastString, need, nullptr, nullptr);
+				copied = WideCharToMultiByte(IsLegacy ? CP_OEMCP : CP_UTF8, 0, buf, -1, LastString, need, nullptr, nullptr);
 				LastError = GetLastError();
 				if (copied > 0) {
 					ret = LastString;
@@ -619,7 +623,7 @@ dllx char* libmulti_get_caption(double index) {
 }
 
 dllx double libmulti_make_bitmap(double index, double width, double height, char* _buf) {
-	if (!_libmulti_exists(index) || width < 0.0 || height < 0.0 || _buf == nullptr) return -1.0;
+	if (!_libmulti_exists(index) || width < 1.0 || height < 1.0 || _buf == nullptr) return -1.0;
 	else {
 		BOOL ret = FALSE;
 		EnterVector();

libmulti/libmulti.h

@@ -6,8 +6,11 @@
 // internal libmulti stuff.
 void EnterVector();
 void LeaveVector();
+void libmulti_cursor_init(void);
+HCURSOR libmulti_cursor_get_from_gm(int v);
 extern HMODULE hModule;
 extern DWORD LastError;
+extern bool AltRGBMode;
 extern std::vector<std::pair<HWND, CMultiD2D*>> vecWindows;
 bool _libmulti_exists(double window);
 DWORD WINAPI libmulti_window_thread(LPVOID lpThreadParameter);
@@ -39,6 +42,10 @@ void libmulti_legacy_mutex_quit();
 dllx char* RegisterCallbacks(char* please, char* dont, char* call, char* it);
 ///->real : Initializes the library.
 dllx double libmulti_init();
+///->real : Enables or disables GMS 2 pixel format.
+dllx double libmulti_set_gms2_pixel_format(double truefalse);
+///->real : Returns if the GMS 2 pixel format is enabled or not.
+dllx double libmulti_get_gms2_pixel_format();
 ///->real : Destroys all windows and frees the library resources.
 dllx double libmulti_quit();
 ///->real : Returns true if the DLL is present and was loaded.

libmulti/libmulti.vcxproj

@@ -185,6 +185,7 @@
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="libmulti.cpp" />
+    <ClCompile Include="libmulti_cursor.cpp" />
     <ClCompile Include="libmulti_dllmain.cpp" />
     <ClCompile Include="libmulti_focus.cpp" />
     <ClCompile Include="libmulti_legacy.cpp" />

libmulti/libmulti.vcxproj.filters

@@ -72,6 +72,9 @@
     <ClCompile Include="libmulti_legacy.cpp">
       <Filter>Файлы исходного кода</Filter>
     </ClCompile>
+    <ClCompile Include="libmulti_cursor.cpp">
+      <Filter>Файлы исходного кода</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="libmulti.rc">