From 634ec34aacc94c27a644f5ffe983529efacb78ff Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Tue, 22 Aug 2023 16:01:14 +0200
Subject: [PATCH] add partial support for Aero Snap

---
 src/wndproc.c | 39 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/src/wndproc.c b/src/wndproc.c
index a77ffa1..82aaf42 100644
--- a/src/wndproc.c
+++ b/src/wndproc.c
@@ -49,6 +49,28 @@ LRESULT CALLBACK fake_WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
     {
         return DefWindowProc(hWnd, uMsg, wParam, lParam);
     }
+    case WM_GETMINMAXINFO:
+    {
+        if (g_ddraw->windowed && g_ddraw->width)
+        {
+            MINMAXINFO* mmi = (MINMAXINFO*)lParam;
+
+            RECT rc = { 0, 0, g_ddraw->width, g_ddraw->height };
+
+            AdjustWindowRectEx(
+                &rc,
+                real_GetWindowLongA(g_ddraw->hwnd, GWL_STYLE),
+                GetMenu(g_ddraw->hwnd) != NULL,
+                real_GetWindowLongA(g_ddraw->hwnd, GWL_EXSTYLE));
+
+            mmi->ptMinTrackSize.x = rc.right - rc.left;
+            mmi->ptMinTrackSize.y = rc.bottom - rc.top;
+
+            return 0;
+        }
+
+        return DefWindowProc(hWnd, uMsg, wParam, lParam);
+    }
     case WM_NCACTIVATE:
     {
         if (g_ddraw->noactivateapp)
@@ -377,10 +399,25 @@ LRESULT CALLBACK fake_WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
         {
             if (wParam == SIZE_RESTORED)
             {
-                if (in_size_move && !g_ddraw->render.thread)
+                if (in_size_move)
+                {
+                    /* User resized window */
+                    if (!g_ddraw->render.thread)
+                    {
+                        g_config.window_rect.right = LOWORD(lParam);
+                        g_config.window_rect.bottom = HIWORD(lParam);
+                    }
+                    else /* Aero Snap resized window */
                 {
                     g_config.window_rect.right = LOWORD(lParam);
                     g_config.window_rect.bottom = HIWORD(lParam);
+
+                        if (g_config.window_rect.right != g_ddraw->render.width ||
+                            g_config.window_rect.bottom != g_ddraw->render.height)
+                        {
+                            dd_SetDisplayMode(g_ddraw->width, g_ddraw->height, g_ddraw->bpp, 0);
+                        }                       
+                    }
                 }
                 /*
                 else if (g_ddraw->wine)