Fix WinAPI glitch on first window resize: Window moves to background

When hiding the visible window it seems to not be possible to bring it
right back to the foreground.
We usually don't need that anyway, so only hide for resolution changes.

Author: Flamefire

extras/videoDrivers/WinAPI/WinAPI.cpp

@@ -113,16 +113,16 @@ bool VideoWinAPI::ResizeScreen(const VideoMode newSize, DisplayMode displayMode)
     if(displayMode == displayMode_ && newSize == GetWindowSize())
         return true;
 
-    ShowWindow(screen, SW_HIDE);
-
     VideoMode windowSize = (displayMode == DisplayMode::Fullscreen) ? FindClosestVideoMode(newSize) : newSize;
     // Try to switch full screen first
     if(displayMode_ == DisplayMode::Fullscreen && displayMode != DisplayMode::Fullscreen)
     {
+        ShowWindow(screen, SW_HIDE);
         if(ChangeDisplaySettings(nullptr, 0) != DISP_CHANGE_SUCCESSFUL)
             return false;
     } else if(displayMode == DisplayMode::Fullscreen)
     {
+        ShowWindow(screen, SW_HIDE);
         if(!MakeFullscreen(windowSize))
             return false;
     }
@@ -141,6 +141,7 @@ bool VideoWinAPI::ResizeScreen(const VideoMode newSize, DisplayMode displayMode)
     SetNewSize(adjustedSize, Extent(adjustedSize.width, adjustedSize.height));
 
     ShowWindow(screen, SW_SHOW);
+    SetActiveWindow(screen);
     SetForegroundWindow(screen);
     SetFocus(screen);
 
@@ -197,6 +198,9 @@ std::pair<Rect, VideoMode> VideoWinAPI::CalculateWindowRect(const DisplayMode mo
             // Calculate real right/bottom based on the window style
             const auto [style, exStyle] = GetStyleFlags(mode);
             AdjustWindowRectEx(&wRect, style, false, exStyle);
+            // Make sure border/title bar is visible
+            wRect.left = std::max<LONG>(wRect.left, 0);
+            wRect.top = std::max<LONG>(wRect.top, 0);
             return std::make_pair(Rect(wRect.left, wRect.top, wRect.right - wRect.left, wRect.bottom - wRect.top),
                                   size);
         }