1 files changed, 294 insertions, 158 deletions

diff --git a/platform/windows/display_server_windows.cpp b/platform/windows/display_server_windows.cpp
index 7eb61b3038..d6ee712a31 100644
--- a/platform/windows/display_server_windows.cpp
+++ b/platform/windows/display_server_windows.cpp
@@ -37,6 +37,11 @@
 #include "scene/resources/texture.h"
 
 #include <avrt.h>
+#include <dwmapi.h>
+
+#ifndef DWMWA_USE_IMMERSIVE_DARK_MODE
+#define DWMWA_USE_IMMERSIVE_DARK_MODE 20
+#endif
 
 #if defined(GLES3_ENABLED)
 #include "drivers/gles3/rasterizer_gles3.h"
@@ -99,7 +104,10 @@ void DisplayServerWindows::_set_mouse_mode_impl(MouseMode p_mode) {
 	if (windows.has(MAIN_WINDOW_ID) && (p_mode == MOUSE_MODE_CAPTURED || p_mode == MOUSE_MODE_CONFINED || p_mode == MOUSE_MODE_CONFINED_HIDDEN)) {
 		// Mouse is grabbed (captured or confined).
 
-		WindowID window_id = windows.has(last_focused_window) ? last_focused_window : MAIN_WINDOW_ID;
+		WindowID window_id = _get_focused_window_or_popup();
+		if (!windows.has(window_id)) {
+			window_id = MAIN_WINDOW_ID;
+		}
 
 		WindowData &wd = windows[window_id];
 
@@ -114,11 +122,15 @@ void DisplayServerWindows::_set_mouse_mode_impl(MouseMode p_mode) {
 			ClientToScreen(wd.hWnd, &pos);
 			SetCursorPos(pos.x, pos.y);
 			SetCapture(wd.hWnd);
+
+			_register_raw_input_devices(window_id);
 		}
 	} else {
 		// Mouse is free to move around (not captured or confined).
 		ReleaseCapture();
 		ClipCursor(nullptr);
+
+		_register_raw_input_devices(INVALID_WINDOW_ID);
 	}
 
 	if (p_mode == MOUSE_MODE_HIDDEN || p_mode == MOUSE_MODE_CAPTURED || p_mode == MOUSE_MODE_CONFINED_HIDDEN) {
@@ -134,6 +146,37 @@ void DisplayServerWindows::_set_mouse_mode_impl(MouseMode p_mode) {
 	}
 }
 
+DisplayServer::WindowID DisplayServerWindows::_get_focused_window_or_popup() const {
+	const List<WindowID>::Element *E = popup_list.back();
+	if (E) {
+		return E->get();
+	}
+
+	return last_focused_window;
+}
+
+void DisplayServerWindows::_register_raw_input_devices(WindowID p_target_window) {
+	use_raw_input = true;
+
+	RAWINPUTDEVICE rid[1] = {};
+	rid[0].usUsagePage = 0x01;
+	rid[0].usUsage = 0x02;
+	rid[0].dwFlags = 0;
+
+	if (p_target_window != INVALID_WINDOW_ID && windows.has(p_target_window)) {
+		// Follow the defined window
+		rid[0].hwndTarget = windows[p_target_window].hWnd;
+	} else {
+		// Follow the keyboard focus
+		rid[0].hwndTarget = 0;
+	}
+
+	if (RegisterRawInputDevices(rid, 1, sizeof(rid[0])) == FALSE) {
+		// Registration failed.
+		use_raw_input = false;
+	}
+}
+
 bool DisplayServerWindows::tts_is_speaking() const {
 	ERR_FAIL_COND_V(!tts, false);
 	return tts->is_speaking();
@@ -189,7 +232,9 @@ DisplayServer::MouseMode DisplayServerWindows::mouse_get_mode() const {
 void DisplayServerWindows::warp_mouse(const Point2i &p_position) {
 	_THREAD_SAFE_METHOD_
 
-	if (!windows.has(last_focused_window)) {
+	WindowID window_id = _get_focused_window_or_popup();
+
+	if (!windows.has(window_id)) {
 		return; // No focused window?
 	}
 
@@ -200,7 +245,7 @@ void DisplayServerWindows::warp_mouse(const Point2i &p_position) {
 		POINT p;
 		p.x = p_position.x;
 		p.y = p_position.y;
-		ClientToScreen(windows[last_focused_window].hWnd, &p);
+		ClientToScreen(windows[window_id].hWnd, &p);
 
 		SetCursorPos(p.x, p.y);
 	}
@@ -516,20 +561,6 @@ float DisplayServerWindows::screen_get_refresh_rate(int p_screen) const {
 	return data.rate;
 }
 
-bool DisplayServerWindows::screen_is_touchscreen(int p_screen) const {
-#ifndef _MSC_VER
-#warning touchscreen not working
-#endif
-	return false;
-}
-
-void DisplayServerWindows::screen_set_orientation(ScreenOrientation p_orientation, int p_screen) {
-}
-
-DisplayServer::ScreenOrientation DisplayServerWindows::screen_get_orientation(int p_screen) const {
-	return SCREEN_LANDSCAPE;
-}
-
 void DisplayServerWindows::screen_set_keep_on(bool p_enable) {
 	if (keep_screen_on == p_enable) {
 		return;
@@ -640,7 +671,13 @@ void DisplayServerWindows::show_window(WindowID p_id) {
 		_update_window_style(p_id);
 	}
 
-	if (wd.no_focus || wd.is_popup) {
+	if (wd.maximized) {
+		ShowWindow(wd.hWnd, SW_SHOWMAXIMIZED);
+		SetForegroundWindow(wd.hWnd); // Slightly higher priority.
+		SetFocus(wd.hWnd); // Set keyboard focus.
+	} else if (wd.minimized) {
+		ShowWindow(wd.hWnd, SW_SHOWMINIMIZED);
+	} else if (wd.no_focus || wd.is_popup) {
 		// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-showwindow
 		ShowWindow(wd.hWnd, SW_SHOWNA);
 	} else {
@@ -881,7 +918,7 @@ void DisplayServerWindows::window_set_position(const Point2i &p_position, Window
 	ERR_FAIL_COND(!windows.has(p_window));
 	WindowData &wd = windows[p_window];
 
-	if (wd.fullscreen) {
+	if (wd.fullscreen || wd.maximized) {
 		return;
 	}
 
@@ -1014,6 +1051,10 @@ void DisplayServerWindows::window_set_size(const Size2i p_size, WindowID p_windo
 	ERR_FAIL_COND(!windows.has(p_window));
 	WindowData &wd = windows[p_window];
 
+	if (wd.fullscreen || wd.maximized) {
+		return;
+	}
+
 	int w = p_size.width;
 	int h = p_size.height;
 
@@ -1031,10 +1072,6 @@ void DisplayServerWindows::window_set_size(const Size2i p_size, WindowID p_windo
 	}
 #endif
 
-	if (wd.fullscreen) {
-		return;
-	}
-
 	RECT rect;
 	GetWindowRect(wd.hWnd, &rect);
 
@@ -1307,7 +1344,30 @@ void DisplayServerWindows::window_set_flag(WindowFlags p_flag, bool p_enabled, W
 			_update_window_style(p_window);
 		} break;
 		case WINDOW_FLAG_TRANSPARENT: {
-			// FIXME: Implement.
+			if (p_enabled) {
+				//enable per-pixel alpha
+
+				DWM_BLURBEHIND bb;
+				ZeroMemory(&bb, sizeof(bb));
+				HRGN hRgn = CreateRectRgn(0, 0, -1, -1);
+				bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
+				bb.hRgnBlur = hRgn;
+				bb.fEnable = TRUE;
+				DwmEnableBlurBehindWindow(wd.hWnd, &bb);
+
+				wd.layered_window = true;
+			} else {
+				//disable per-pixel alpha
+				wd.layered_window = false;
+
+				DWM_BLURBEHIND bb;
+				ZeroMemory(&bb, sizeof(bb));
+				HRGN hRgn = CreateRectRgn(0, 0, -1, -1);
+				bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
+				bb.hRgnBlur = hRgn;
+				bb.fEnable = FALSE;
+				DwmEnableBlurBehindWindow(wd.hWnd, &bb);
+			}
 		} break;
 		case WINDOW_FLAG_NO_FOCUS: {
 			wd.no_focus = p_enabled;
@@ -1318,7 +1378,7 @@ void DisplayServerWindows::window_set_flag(WindowFlags p_flag, bool p_enabled, W
 			ERR_FAIL_COND_MSG(IsWindowVisible(wd.hWnd) && (wd.is_popup != p_enabled), "Popup flag can't changed while window is opened.");
 			wd.is_popup = p_enabled;
 		} break;
-		case WINDOW_FLAG_MAX:
+		default:
 			break;
 	}
 }
@@ -1339,7 +1399,7 @@ bool DisplayServerWindows::window_get_flag(WindowFlags p_flag, WindowID p_window
 			return wd.always_on_top;
 		} break;
 		case WINDOW_FLAG_TRANSPARENT: {
-			// FIXME: Implement.
+			return wd.layered_window;
 		} break;
 		case WINDOW_FLAG_NO_FOCUS: {
 			return wd.no_focus;
@@ -1347,7 +1407,7 @@ bool DisplayServerWindows::window_get_flag(WindowFlags p_flag, WindowID p_window
 		case WINDOW_FLAG_POPUP: {
 			return wd.is_popup;
 		} break;
-		case WINDOW_FLAG_MAX:
+		default:
 			break;
 	}
 
@@ -1470,7 +1530,7 @@ void DisplayServerWindows::cursor_set_shape(CursorShape p_shape) {
 		IDC_HELP
 	};
 
-	if (cursors[p_shape] != nullptr) {
+	if (cursors_cache.has(p_shape)) {
 		SetCursor(cursors[p_shape]);
 	} else {
 		SetCursor(LoadCursor(hInstance, win_cursors[p_shape]));
@@ -1483,55 +1543,6 @@ DisplayServer::CursorShape DisplayServerWindows::cursor_get_shape() const {
 	return cursor_shape;
 }
 
-void DisplayServerWindows::GetMaskBitmaps(HBITMAP hSourceBitmap, COLORREF clrTransparent, OUT HBITMAP &hAndMaskBitmap, OUT HBITMAP &hXorMaskBitmap) {
-	// Get the system display DC.
-	HDC hDC = GetDC(nullptr);
-
-	// Create helper DC.
-	HDC hMainDC = CreateCompatibleDC(hDC);
-	HDC hAndMaskDC = CreateCompatibleDC(hDC);
-	HDC hXorMaskDC = CreateCompatibleDC(hDC);
-
-	// Get the dimensions of the source bitmap.
-	BITMAP bm;
-	GetObject(hSourceBitmap, sizeof(BITMAP), &bm);
-
-	// Create the mask bitmaps.
-	hAndMaskBitmap = CreateCompatibleBitmap(hDC, bm.bmWidth, bm.bmHeight); // Color.
-	hXorMaskBitmap = CreateCompatibleBitmap(hDC, bm.bmWidth, bm.bmHeight); // Color.
-
-	// Release the system display DC.
-	ReleaseDC(nullptr, hDC);
-
-	// Select the bitmaps to helper DC.
-	HBITMAP hOldMainBitmap = (HBITMAP)SelectObject(hMainDC, hSourceBitmap);
-	HBITMAP hOldAndMaskBitmap = (HBITMAP)SelectObject(hAndMaskDC, hAndMaskBitmap);
-	HBITMAP hOldXorMaskBitmap = (HBITMAP)SelectObject(hXorMaskDC, hXorMaskBitmap);
-
-	// Assign the monochrome AND mask bitmap pixels so that the pixels of the source bitmap
-	// with 'clrTransparent' will be white pixels of the monochrome bitmap.
-	SetBkColor(hMainDC, clrTransparent);
-	BitBlt(hAndMaskDC, 0, 0, bm.bmWidth, bm.bmHeight, hMainDC, 0, 0, SRCCOPY);
-
-	// Assign the color XOR mask bitmap pixels so that the pixels of the source bitmap
-	// with 'clrTransparent' will be black and rest the pixels same as corresponding
-	// pixels of the source bitmap.
-	SetBkColor(hXorMaskDC, RGB(0, 0, 0));
-	SetTextColor(hXorMaskDC, RGB(255, 255, 255));
-	BitBlt(hXorMaskDC, 0, 0, bm.bmWidth, bm.bmHeight, hAndMaskDC, 0, 0, SRCCOPY);
-	BitBlt(hXorMaskDC, 0, 0, bm.bmWidth, bm.bmHeight, hMainDC, 0, 0, SRCAND);
-
-	// Deselect bitmaps from the helper DC.
-	SelectObject(hMainDC, hOldMainBitmap);
-	SelectObject(hAndMaskDC, hOldAndMaskBitmap);
-	SelectObject(hXorMaskDC, hOldXorMaskBitmap);
-
-	// Delete the helper DC.
-	DeleteDC(hXorMaskDC);
-	DeleteDC(hAndMaskDC);
-	DeleteDC(hMainDC);
-}
-
 void DisplayServerWindows::cursor_set_custom_image(const Ref<Resource> &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot) {
 	_THREAD_SAFE_METHOD_
 
@@ -1584,8 +1595,26 @@ void DisplayServerWindows::cursor_set_custom_image(const Ref<Resource> &p_cursor
 		UINT image_size = texture_size.width * texture_size.height;
 
 		// Create the BITMAP with alpha channel.
-		COLORREF *buffer = (COLORREF *)memalloc(sizeof(COLORREF) * image_size);
-
+		COLORREF *buffer = nullptr;
+
+		BITMAPV5HEADER bi;
+		ZeroMemory(&bi, sizeof(bi));
+		bi.bV5Size = sizeof(bi);
+		bi.bV5Width = texture_size.width;
+		bi.bV5Height = -texture_size.height;
+		bi.bV5Planes = 1;
+		bi.bV5BitCount = 32;
+		bi.bV5Compression = BI_BITFIELDS;
+		bi.bV5RedMask = 0x00ff0000;
+		bi.bV5GreenMask = 0x0000ff00;
+		bi.bV5BlueMask = 0x000000ff;
+		bi.bV5AlphaMask = 0xff000000;
+
+		HDC dc = GetDC(nullptr);
+		HBITMAP bitmap = CreateDIBSection(dc, reinterpret_cast<BITMAPINFO *>(&bi), DIB_RGB_COLORS, reinterpret_cast<void **>(&buffer), nullptr, 0);
+		HBITMAP mask = CreateBitmap(texture_size.width, texture_size.height, 1, 1, nullptr);
+
+		bool fully_transparent = true;
 		for (UINT index = 0; index < image_size; index++) {
 			int row_index = floor(index / texture_size.width) + atlas_rect.position.y;
 			int column_index = (index % int(texture_size.width)) + atlas_rect.position.x;
@@ -1594,39 +1623,28 @@ void DisplayServerWindows::cursor_set_custom_image(const Ref<Resource> &p_cursor
 				column_index = MIN(column_index, atlas_rect.size.width - 1);
 				row_index = MIN(row_index, atlas_rect.size.height - 1);
 			}
+			const Color &c = image->get_pixel(column_index, row_index);
+			fully_transparent = fully_transparent && (c.a == 0.f);
 
-			*(buffer + index) = image->get_pixel(column_index, row_index).to_argb32();
-		}
-
-		// Using 4 channels, so 4 * 8 bits.
-		HBITMAP bitmap = CreateBitmap(texture_size.width, texture_size.height, 1, 4 * 8, buffer);
-		COLORREF clrTransparent = -1;
-
-		// Create the AND and XOR masks for the bitmap.
-		HBITMAP hAndMask = nullptr;
-		HBITMAP hXorMask = nullptr;
-
-		GetMaskBitmaps(bitmap, clrTransparent, hAndMask, hXorMask);
-
-		if (nullptr == hAndMask || nullptr == hXorMask) {
-			memfree(buffer);
-			DeleteObject(bitmap);
-			return;
+			*(buffer + index) = c.to_argb32();
 		}
 
 		// Finally, create the icon.
-		ICONINFO iconinfo;
-		iconinfo.fIcon = FALSE;
-		iconinfo.xHotspot = p_hotspot.x;
-		iconinfo.yHotspot = p_hotspot.y;
-		iconinfo.hbmMask = hAndMask;
-		iconinfo.hbmColor = hXorMask;
-
 		if (cursors[p_shape]) {
 			DestroyIcon(cursors[p_shape]);
 		}
 
-		cursors[p_shape] = CreateIconIndirect(&iconinfo);
+		if (fully_transparent) {
+			cursors[p_shape] = nullptr;
+		} else {
+			ICONINFO iconinfo;
+			iconinfo.fIcon = FALSE;
+			iconinfo.xHotspot = p_hotspot.x;
+			iconinfo.yHotspot = p_hotspot.y;
+			iconinfo.hbmMask = mask;
+			iconinfo.hbmColor = bitmap;
+			cursors[p_shape] = CreateIconIndirect(&iconinfo);
+		}
 
 		Vector<Variant> params;
 		params.push_back(p_cursor);
@@ -1639,17 +1657,15 @@ void DisplayServerWindows::cursor_set_custom_image(const Ref<Resource> &p_cursor
 			}
 		}
 
-		DeleteObject(hAndMask);
-		DeleteObject(hXorMask);
-
-		memfree(buffer);
+		DeleteObject(mask);
 		DeleteObject(bitmap);
+		ReleaseDC(nullptr, dc);
 	} else {
 		// Reset to default system cursor.
 		if (cursors[p_shape]) {
 			DestroyIcon(cursors[p_shape]);
-			cursors[p_shape] = nullptr;
 		}
+		cursors[p_shape] = nullptr;
 
 		CursorShape c = cursor_shape;
 		cursor_shape = CURSOR_MAX;
@@ -2391,6 +2407,20 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 		case WM_PAINT: {
 			Main::force_redraw();
 		} break;
+		case WM_SETTINGCHANGE: {
+			if (lParam && CompareStringOrdinal(reinterpret_cast<LPCWCH>(lParam), -1, L"ImmersiveColorSet", -1, true) == CSTR_EQUAL) {
+				if (is_dark_mode_supported() && dark_title_available) {
+					BOOL value = is_dark_mode();
+					::DwmSetWindowAttribute(windows[window_id].hWnd, DWMWA_USE_IMMERSIVE_DARK_MODE, &value, sizeof(value));
+				}
+			}
+		} break;
+		case WM_THEMECHANGED: {
+			if (is_dark_mode_supported() && dark_title_available) {
+				BOOL value = is_dark_mode();
+				::DwmSetWindowAttribute(windows[window_id].hWnd, DWMWA_USE_IMMERSIVE_DARK_MODE, &value, sizeof(value));
+			}
+		} break;
 		case WM_SYSCOMMAND: // Intercept system commands.
 		{
 			switch (wParam) // Check system calls.
@@ -2414,10 +2444,16 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 			return 0; // Jump back.
 		}
 		case WM_MOUSELEAVE: {
-			old_invalid = true;
-			windows[window_id].mouse_outside = true;
+			if (window_mouseover_id == window_id) {
+				old_invalid = true;
+				window_mouseover_id = INVALID_WINDOW_ID;
 
-			_send_window_event(windows[window_id], WINDOW_EVENT_MOUSE_EXIT);
+				_send_window_event(windows[window_id], WINDOW_EVENT_MOUSE_EXIT);
+			} else if (window_mouseover_id != INVALID_WINDOW_ID) {
+				// This is reached during drag and drop, after dropping in a different window.
+				// Once-off notification, must call again.
+				track_mouse_leave_event(windows[window_mouseover_id].hWnd);
+			}
 
 		} break;
 		case WM_INPUT: {
@@ -2487,7 +2523,7 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 					old_y = coords.y;
 				}
 
-				if (windows[window_id].window_has_focus && mm->get_relative() != Vector2()) {
+				if ((windows[window_id].window_has_focus || windows[window_id].is_popup) && mm->get_relative() != Vector2()) {
 					Input::get_singleton()->parse_input_event(mm);
 				}
 			}
@@ -2512,24 +2548,27 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 			if ((tablet_get_current_driver() == "wintab") && wintab_available && windows[window_id].wtctx) {
 				PACKET packet;
 				if (wintab_WTPacket(windows[window_id].wtctx, wParam, &packet)) {
-					float pressure = float(packet.pkNormalPressure - windows[window_id].min_pressure) / float(windows[window_id].max_pressure - windows[window_id].min_pressure);
-					windows[window_id].last_pressure = pressure;
+					POINT coords;
+					GetCursorPos(&coords);
+					ScreenToClient(windows[window_id].hWnd, &coords);
+
 					windows[window_id].last_pressure_update = 0;
 
+					float pressure = float(packet.pkNormalPressure - windows[window_id].min_pressure) / float(windows[window_id].max_pressure - windows[window_id].min_pressure);
 					double azim = (packet.pkOrientation.orAzimuth / 10.0f) * (Math_PI / 180);
 					double alt = Math::tan((Math::abs(packet.pkOrientation.orAltitude / 10.0f)) * (Math_PI / 180));
+					bool inverted = packet.pkStatus & TPS_INVERT;
 
-					if (windows[window_id].tilt_supported) {
-						windows[window_id].last_tilt = Vector2(Math::atan(Math::sin(azim) / alt), Math::atan(Math::cos(azim) / alt));
-					} else {
-						windows[window_id].last_tilt = Vector2();
-					}
+					Vector2 tilt = (windows[window_id].tilt_supported) ? Vector2(Math::atan(Math::sin(azim) / alt), Math::atan(Math::cos(azim) / alt)) : Vector2();
 
-					windows[window_id].last_pen_inverted = packet.pkStatus & TPS_INVERT;
+					// Nothing changed, ignore event.
+					if (!old_invalid && coords.x == old_x && coords.y == old_y && windows[window_id].last_pressure == pressure && windows[window_id].last_tilt == tilt && windows[window_id].last_pen_inverted == inverted) {
+						break;
+					}
 
-					POINT coords;
-					GetCursorPos(&coords);
-					ScreenToClient(windows[window_id].hWnd, &coords);
+					windows[window_id].last_pressure = pressure;
+					windows[window_id].last_tilt = tilt;
+					windows[window_id].last_pen_inverted = inverted;
 
 					// Don't calculate relative mouse movement if we don't have focus in CAPTURED mode.
 					if (!windows[window_id].window_has_focus && mouse_mode == MOUSE_MODE_CAPTURED) {
@@ -2645,17 +2684,21 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 				}
 			}
 
-			if (windows[window_id].mouse_outside) {
+			if (window_mouseover_id != window_id) {
 				// Mouse enter.
 
 				if (mouse_mode != MOUSE_MODE_CAPTURED) {
+					if (window_mouseover_id != INVALID_WINDOW_ID) {
+						// Leave previous window.
+						_send_window_event(windows[window_mouseover_id], WINDOW_EVENT_MOUSE_EXIT);
+					}
 					_send_window_event(windows[window_id], WINDOW_EVENT_MOUSE_ENTER);
 				}
 
 				CursorShape c = cursor_shape;
 				cursor_shape = CURSOR_MAX;
 				cursor_set_shape(c);
-				windows[window_id].mouse_outside = false;
+				window_mouseover_id = window_id;
 
 				// Once-off notification, must call again.
 				track_mouse_leave_event(hWnd);
@@ -2746,17 +2789,29 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 				}
 			}
 
-			if (windows[window_id].mouse_outside) {
+			DisplayServer::WindowID over_id = get_window_at_screen_position(mouse_get_position());
+			if (!Rect2(window_get_position(over_id), Point2(windows[over_id].width, windows[over_id].height)).has_point(mouse_get_position())) {
+				// Don't consider the windowborder as part of the window.
+				over_id = INVALID_WINDOW_ID;
+			}
+			if (window_mouseover_id != over_id) {
 				// Mouse enter.
 
 				if (mouse_mode != MOUSE_MODE_CAPTURED) {
-					_send_window_event(windows[window_id], WINDOW_EVENT_MOUSE_ENTER);
+					if (window_mouseover_id != INVALID_WINDOW_ID) {
+						// Leave previous window.
+						_send_window_event(windows[window_mouseover_id], WINDOW_EVENT_MOUSE_EXIT);
+					}
+
+					if (over_id != INVALID_WINDOW_ID) {
+						_send_window_event(windows[over_id], WINDOW_EVENT_MOUSE_ENTER);
+					}
 				}
 
 				CursorShape c = cursor_shape;
 				cursor_shape = CURSOR_MAX;
 				cursor_set_shape(c);
-				windows[window_id].mouse_outside = false;
+				window_mouseover_id = over_id;
 
 				// Once-off notification, must call again.
 				track_mouse_leave_event(hWnd);
@@ -2767,9 +2822,13 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 				break;
 			}
 
+			DisplayServer::WindowID receiving_window_id = _get_focused_window_or_popup();
+			if (receiving_window_id == INVALID_WINDOW_ID) {
+				receiving_window_id = window_id;
+			}
 			Ref<InputEventMouseMotion> mm;
 			mm.instantiate();
-			mm->set_window_id(window_id);
+			mm->set_window_id(receiving_window_id);
 			mm->set_ctrl_pressed((wParam & MK_CONTROL) != 0);
 			mm->set_shift_pressed((wParam & MK_SHIFT) != 0);
 			mm->set_alt_pressed(alt_mem);
@@ -2826,9 +2885,14 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 			mm->set_relative(Vector2(mm->get_position() - Vector2(old_x, old_y)));
 			old_x = mm->get_position().x;
 			old_y = mm->get_position().y;
-			if (windows[window_id].window_has_focus || window_get_active_popup() == window_id) {
-				Input::get_singleton()->parse_input_event(mm);
+
+			if (!windows[receiving_window_id].window_has_focus) {
+				// In case of unfocused Popups, adjust event position.
+				Point2i pos = mm->get_position() - window_get_position(receiving_window_id) + window_get_position(window_id);
+				mm->set_position(pos);
+				mm->set_global_position(pos);
 			}
+			Input::get_singleton()->parse_input_event(mm);
 
 		} break;
 		case WM_LBUTTONDOWN:
@@ -3054,7 +3118,7 @@ LRESULT DisplayServerWindows::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARA
 					rect_changed = true;
 				}
 #if defined(VULKAN_ENABLED)
-				if (context_vulkan && window_created) {
+				if (context_vulkan && window.context_created) {
 					// Note: Trigger resize event to update swapchains when window is minimized/restored, even if size is not changed.
 					context_vulkan->window_resize(window_id, window.width, window.height);
 				}
@@ -3310,7 +3374,7 @@ void DisplayServerWindows::_process_key_events() {
 					k->set_ctrl_pressed(ke.control);
 					k->set_meta_pressed(ke.meta);
 					k->set_pressed(true);
-					k->set_keycode((Key)KeyMappingWindows::get_keysym(ke.wParam));
+					k->set_keycode((Key)KeyMappingWindows::get_keysym(MapVirtualKey((ke.lParam >> 16) & 0xFF, MAPVK_VSC_TO_VK)));
 					k->set_physical_keycode((Key)(KeyMappingWindows::get_scansym((ke.lParam >> 16) & 0xFF, ke.lParam & (1 << 24))));
 					k->set_unicode(unicode);
 					if (k->get_unicode() && gr_mem) {
@@ -3501,23 +3565,26 @@ DisplayServer::WindowID DisplayServerWindows::_create_window(WindowMode p_mode,
 			wd.pre_fs_valid = true;
 		}
 
+		if (is_dark_mode_supported() && dark_title_available) {
+			BOOL value = is_dark_mode();
+			::DwmSetWindowAttribute(wd.hWnd, DWMWA_USE_IMMERSIVE_DARK_MODE, &value, sizeof(value));
+		}
+
 #ifdef VULKAN_ENABLED
 		if (context_vulkan) {
-			if (context_vulkan->window_create(id, p_vsync_mode, wd.hWnd, hInstance, WindowRect.right - WindowRect.left, WindowRect.bottom - WindowRect.top) == -1) {
+			if (context_vulkan->window_create(id, p_vsync_mode, wd.hWnd, hInstance, WindowRect.right - WindowRect.left, WindowRect.bottom - WindowRect.top) != OK) {
 				memdelete(context_vulkan);
 				context_vulkan = nullptr;
 				windows.erase(id);
 				ERR_FAIL_V_MSG(INVALID_WINDOW_ID, "Failed to create Vulkan Window.");
 			}
+			wd.context_created = true;
 		}
 #endif
 
 #ifdef GLES3_ENABLED
 		if (gl_manager) {
-			Error err = gl_manager->window_create(id, wd.hWnd, hInstance, WindowRect.right - WindowRect.left, WindowRect.bottom - WindowRect.top);
-
-			// shut down OpenGL, to mirror behavior of Vulkan code
-			if (err != OK) {
+			if (gl_manager->window_create(id, wd.hWnd, hInstance, WindowRect.right - WindowRect.left, WindowRect.bottom - WindowRect.top) != OK) {
 				memdelete(gl_manager);
 				gl_manager = nullptr;
 				windows.erase(id);
@@ -3558,6 +3625,16 @@ DisplayServer::WindowID DisplayServerWindows::_create_window(WindowMode p_mode,
 			wd.wtctx = 0;
 		}
 
+		if (p_mode == WINDOW_MODE_MAXIMIZED) {
+			wd.maximized = true;
+			wd.minimized = false;
+		}
+
+		if (p_mode == WINDOW_MODE_MINIMIZED) {
+			wd.maximized = false;
+			wd.minimized = true;
+		}
+
 		wd.last_pressure = 0;
 		wd.last_pressure_update = 0;
 		wd.last_tilt = Vector2();
@@ -3587,6 +3664,15 @@ WTInfoPtr DisplayServerWindows::wintab_WTInfo = nullptr;
 WTPacketPtr DisplayServerWindows::wintab_WTPacket = nullptr;
 WTEnablePtr DisplayServerWindows::wintab_WTEnable = nullptr;
 
+// UXTheme API.
+bool DisplayServerWindows::dark_title_available = false;
+bool DisplayServerWindows::ux_theme_available = false;
+IsDarkModeAllowedForAppPtr DisplayServerWindows::IsDarkModeAllowedForApp = nullptr;
+ShouldAppsUseDarkModePtr DisplayServerWindows::ShouldAppsUseDarkMode = nullptr;
+GetImmersiveColorFromColorSetExPtr DisplayServerWindows::GetImmersiveColorFromColorSetEx = nullptr;
+GetImmersiveColorTypeFromNamePtr DisplayServerWindows::GetImmersiveColorTypeFromName = nullptr;
+GetImmersiveUserColorSetPreferencePtr DisplayServerWindows::GetImmersiveUserColorSetPreference = nullptr;
+
 // Windows Ink API.
 bool DisplayServerWindows::winink_available = false;
 GetPointerTypePtr DisplayServerWindows::win8p_GetPointerType = nullptr;
@@ -3598,6 +3684,23 @@ typedef enum _SHC_PROCESS_DPI_AWARENESS {
 	SHC_PROCESS_PER_MONITOR_DPI_AWARE = 2
 } SHC_PROCESS_DPI_AWARENESS;
 
+bool DisplayServerWindows::is_dark_mode_supported() const {
+	return ux_theme_available && IsDarkModeAllowedForApp();
+}
+
+bool DisplayServerWindows::is_dark_mode() const {
+	return ux_theme_available && ShouldAppsUseDarkMode();
+}
+
+Color DisplayServerWindows::get_accent_color() const {
+	if (!ux_theme_available) {
+		return Color(0, 0, 0, 0);
+	}
+
+	int argb = GetImmersiveColorFromColorSetEx((UINT)GetImmersiveUserColorSetPreference(false, false), GetImmersiveColorTypeFromName(L"ImmersiveSystemAccent"), false, 0);
+	return Color((argb & 0xFF) / 255.f, ((argb & 0xFF00) >> 8) / 255.f, ((argb & 0xFF0000) >> 16) / 255.f, ((argb & 0xFF000000) >> 24) / 255.f);
+}
+
 int DisplayServerWindows::tablet_get_driver_count() const {
 	return tablet_drivers.size();
 }
@@ -3632,7 +3735,7 @@ void DisplayServerWindows::tablet_set_current_driver(const String &p_driver) {
 	}
 }
 
-DisplayServerWindows::DisplayServerWindows(const String &p_rendering_driver, WindowMode p_mode, VSyncMode p_vsync_mode, uint32_t p_flags, const Vector2i &p_resolution, Error &r_error) {
+DisplayServerWindows::DisplayServerWindows(const String &p_rendering_driver, WindowMode p_mode, VSyncMode p_vsync_mode, uint32_t p_flags, const Vector2i *p_position, const Vector2i &p_resolution, Error &r_error) {
 	drop_events = false;
 	key_event_pos = 0;
 
@@ -3655,6 +3758,35 @@ DisplayServerWindows::DisplayServerWindows(const String &p_rendering_driver, Win
 	// Enforce default keep screen on value.
 	screen_set_keep_on(GLOBAL_GET("display/window/energy_saving/keep_screen_on"));
 
+	// Load Windows version info.
+	OSVERSIONINFOW os_ver;
+	ZeroMemory(&os_ver, sizeof(OSVERSIONINFOW));
+	os_ver.dwOSVersionInfoSize = sizeof(OSVERSIONINFOW);
+
+	HMODULE nt_lib = LoadLibraryW(L"ntdll.dll");
+	if (nt_lib) {
+		RtlGetVersionPtr RtlGetVersion = (RtlGetVersionPtr)GetProcAddress(nt_lib, "RtlGetVersion");
+		if (RtlGetVersion) {
+			RtlGetVersion(&os_ver);
+		}
+		FreeLibrary(nt_lib);
+	}
+
+	// Load UXTheme.
+	HMODULE ux_theme_lib = LoadLibraryW(L"uxtheme.dll");
+	if (ux_theme_lib) {
+		IsDarkModeAllowedForApp = (IsDarkModeAllowedForAppPtr)GetProcAddress(ux_theme_lib, MAKEINTRESOURCEA(136));
+		ShouldAppsUseDarkMode = (ShouldAppsUseDarkModePtr)GetProcAddress(ux_theme_lib, MAKEINTRESOURCEA(132));
+		GetImmersiveColorFromColorSetEx = (GetImmersiveColorFromColorSetExPtr)GetProcAddress(ux_theme_lib, MAKEINTRESOURCEA(95));
+		GetImmersiveColorTypeFromName = (GetImmersiveColorTypeFromNamePtr)GetProcAddress(ux_theme_lib, MAKEINTRESOURCEA(96));
+		GetImmersiveUserColorSetPreference = (GetImmersiveUserColorSetPreferencePtr)GetProcAddress(ux_theme_lib, MAKEINTRESOURCEA(98));
+
+		ux_theme_available = IsDarkModeAllowedForApp && ShouldAppsUseDarkMode && GetImmersiveColorFromColorSetEx && GetImmersiveColorTypeFromName && GetImmersiveUserColorSetPreference;
+		if (os_ver.dwBuildNumber >= 22000) {
+			dark_title_available = true;
+		}
+	}
+
 	// Note: Wacom WinTab driver API for pen input, for devices incompatible with Windows Ink.
 	HMODULE wintab_lib = LoadLibraryW(L"wintab32.dll");
 	if (wintab_lib) {
@@ -3717,19 +3849,7 @@ DisplayServerWindows::DisplayServerWindows(const String &p_rendering_driver, Win
 		return;
 	}
 
-	use_raw_input = true;
-
-	RAWINPUTDEVICE Rid[1];
-
-	Rid[0].usUsagePage = 0x01;
-	Rid[0].usUsage = 0x02;
-	Rid[0].dwFlags = 0;
-	Rid[0].hwndTarget = 0;
-
-	if (RegisterRawInputDevices(Rid, 1, sizeof(Rid[0])) == FALSE) {
-		// Registration failed.
-		use_raw_input = false;
-	}
+	_register_raw_input_devices(INVALID_WINDOW_ID);
 
 #if defined(VULKAN_ENABLED)
 	if (rendering_driver == "vulkan") {
@@ -3767,6 +3887,10 @@ DisplayServerWindows::DisplayServerWindows(const String &p_rendering_driver, Win
 			(screen_get_size(0).width - p_resolution.width) / 2,
 			(screen_get_size(0).height - p_resolution.height) / 2);
 
+	if (p_position != nullptr) {
+		window_position = *p_position;
+	}
+
 	WindowID main_window = _create_window(p_mode, p_vsync_mode, 0, Rect2i(window_position, p_resolution));
 	ERR_FAIL_COND_MSG(main_window == INVALID_WINDOW_ID, "Failed to create main window.");
 
@@ -3830,12 +3954,24 @@ Vector<String> DisplayServerWindows::get_rendering_drivers_func() {
 	return drivers;
 }
 
-DisplayServer *DisplayServerWindows::create_func(const String &p_rendering_driver, WindowMode p_mode, VSyncMode p_vsync_mode, uint32_t p_flags, const Vector2i &p_resolution, Error &r_error) {
-	DisplayServer *ds = memnew(DisplayServerWindows(p_rendering_driver, p_mode, p_vsync_mode, p_flags, p_resolution, r_error));
+DisplayServer *DisplayServerWindows::create_func(const String &p_rendering_driver, WindowMode p_mode, VSyncMode p_vsync_mode, uint32_t p_flags, const Vector2i *p_position, const Vector2i &p_resolution, Error &r_error) {
+	DisplayServer *ds = memnew(DisplayServerWindows(p_rendering_driver, p_mode, p_vsync_mode, p_flags, p_position, p_resolution, r_error));
 	if (r_error != OK) {
-		OS::get_singleton()->alert("Your video card driver does not support any of the supported Vulkan or OpenGL versions.\n"
-								   "Please update your drivers or if you have a very old or integrated GPU upgrade it.",
-				"Unable to initialize Video driver");
+		if (p_rendering_driver == "vulkan") {
+			String executable_name = OS::get_singleton()->get_executable_path().get_file();
+			OS::get_singleton()->alert("Your video card driver does not support the selected Vulkan version.\n"
+									   "Please try updating your GPU driver or try using the OpenGL 3 driver.\n"
+									   "You can enable the OpenGL 3 driver by starting the engine from the\n"
+									   "command line with the command:\n'./" +
+							executable_name + " --rendering-driver opengl3'.\n "
+											  "If you have updated your graphics drivers recently, try rebooting.",
+					"Unable to initialize Video driver");
+		} else {
+			OS::get_singleton()->alert("Your video card driver does not support the selected OpenGL version.\n"
+									   "Please try updating your GPU driver.\n"
+									   "If you have updated your graphics drivers recently, try rebooting.",
+					"Unable to initialize Video driver");
+		}
 	}
 	return ds;
 }