From cbd5b91141c71a5dc2c9f3f1ce1336e17d945219 Mon Sep 17 00:00:00 2001
From: itsmattkc <34096995+itsmattkc@users.noreply.github.com>
Date: Thu, 31 Mar 2022 12:02:53 -0700
Subject: [PATCH] implement flip surfaces

---
 lib/dllmain.cpp   | 9 +++++++++
 lib/hooks.cpp     | 7 ++++++-
 src/patchgrid.cpp | 4 ++++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/lib/dllmain.cpp b/lib/dllmain.cpp
index e0d50c9..337ab0d 100644
--- a/lib/dllmain.cpp
+++ b/lib/dllmain.cpp
@@ -31,6 +31,15 @@ DWORD WINAPI Patch()
   dsCreateOriginal = (dsCreateFunction)OverwriteImport(dllBase, "DirectSoundCreate", (LPVOID)InterceptDirectSoundCreate);
   dinputCreateOriginal = (dinputCreateFunction)OverwriteImport(dllBase, "DirectInputCreateA", (LPVOID)InterceptDirectInputCreateA);
 
+  // Flip surfaces is incompatible with full screen, if these options are set, warn the user
+  if (config.GetInt(_T("FlipSurfaces")) && !config.GetInt(_T("FullScreen"))) {
+    if (MessageBoxA(0, "The setting 'Flip Video Memory Pages' is incompatible with LEGO Island's windowed mode. "
+                       "LEGO Island will likely fail to start up unless you disable 'Flip Video Memory Pages' "
+                       "or run in full screen mode. Do you wish to continue?", "Warning", MB_YESNO) == IDNO) {
+      TerminateProcess(GetCurrentProcess(), 0);
+    }
+  }
+
   // Stay active when defocused
   if (config.GetInt(_T("StayActiveWhenDefocused"))) {
     // Patch jump if window isn't active (TODO: Replace with C++ patch)
diff --git a/lib/hooks.cpp b/lib/hooks.cpp
index 20d8431..3ba3437 100644
--- a/lib/hooks.cpp
+++ b/lib/hooks.cpp
@@ -181,7 +181,12 @@ LONG WINAPI InterceptRegQueryValueExA(HKEY hKey, LPCSTR lpValueName, LPDWORD lpR
 
   } else if (!strcmp(lpValueName, "Draw Cursor")) {
 
-    ReturnRegistryYESNOFromBool(lpData, config.GetInt(_T("DrawCursor"), 1));
+    ReturnRegistryYESNOFromBool(lpData, config.GetInt(_T("DrawCursor"), 0));
+    return ERROR_SUCCESS;
+
+  } else if (!strcmp(lpValueName, "Flip Surfaces")) {
+
+    ReturnRegistryYESNOFromBool(lpData, config.GetInt(_T("FlipSurfaces"), 0));
     return ERROR_SUCCESS;
 
   } else if (!strcmp(lpValueName, "3D Device ID")) {
diff --git a/src/patchgrid.cpp b/src/patchgrid.cpp
index 55d0612..a648020 100644
--- a/src/patchgrid.cpp
+++ b/src/patchgrid.cpp
@@ -147,6 +147,10 @@ PatchGrid::PatchGrid()
            _T("Renders a custom in-game cursor, rather than a standard Windows pointer."),
            AddBoolItem(sectionGraphics, _T("Draw Cursor"), false));
 
+  AddPatch("FlipSurfaces",
+           _T(""), // FIXME: Write description for this
+           AddBoolItem(sectionGraphics, _T("Flip Video Memory Pages"), false));
+
   vector<string> fpsList;
   fpsList.push_back(_T("Default"));
   fpsList.push_back(_T("Uncapped"));