Merge pull request #1005 from maximegmd/feature/fix-cursor

Fix ImGui spam of ShowCursor/HideCursor
maximegmd · Mar 1, 2025 · 12873ce · 12873ce
2 parents c3fd1db + 16557fe
commit 12873ce
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Showing 6 changed files with 13 additions and 94 deletions.
diff --git a/src/d3d12/D3D12.cpp b/src/d3d12/D3D12.cpp
@@ -9,28 +9,11 @@
 
 void D3D12::SetTrapInputInImGui(const bool acEnabled)
 {
-    // Must have an out-condition to this otherwise infinite loop
-    static int constexpr maxCursorDepth = 8;
-    int showCursorTries = 0;
-    int showCursorState;
-    if (acEnabled)
-        do
-        {
-            showCursorState = ShowCursor(TRUE);
-        } while (showCursorState < 0 && showCursorTries++ < maxCursorDepth);
-    else
-        do
-        {
-            showCursorState = ShowCursor(FALSE);
-        } while (showCursorState >= 0 && showCursorTries++ < maxCursorDepth);
-
-    // Turn off software cursor
-    if (showCursorTries < maxCursorDepth || acEnabled == false)
-        ImGui::GetIO().MouseDrawCursor = false;
+    static const RED4ext::CName cReason = "ImGui";
+    static RED4ext::UniversalRelocFunc<void (*)(RED4ext::CBaseEngine::UnkD0* apThis, RED4ext::CName aReason, bool aShow)>
+        forceCursor(CyberEngineTweaks::AddressHashes::InputSystemWin32Base_ForceCursor);
 
-    // Enable software cursor as fallback if necessary
-    else
-        ImGui::GetIO().MouseDrawCursor = acEnabled;
+    forceCursor(RED4ext::CGameEngine::Get()->unkD0, cReason, acEnabled);
 
     m_trapInputInImGui = acEnabled;
 }

diff --git a/src/d3d12/D3D12_Functions.cpp b/src/d3d12/D3D12_Functions.cpp
@@ -81,7 +81,7 @@ bool D3D12::Initialize()
 
     D3D12_DESCRIPTOR_HEAP_DESC srvdesc = {};
     srvdesc.Type = D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV;
-    srvdesc.NumDescriptors = buffersCounts;
+    srvdesc.NumDescriptors = 200; // Same number as is used in scripting/Texture
     srvdesc.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_SHADER_VISIBLE;
     if (FAILED(m_pd3d12Device->CreateDescriptorHeap(&srvdesc, IID_PPV_ARGS(&m_pd3dSrvDescHeap))))
     {
@@ -313,6 +313,8 @@ bool D3D12::InitializeImGui(size_t aBuffersCounts)
     ImGui::GetStyle() = m_styleReference;
     ImGui::GetStyle().ScaleAllSizes(scaleFromReference);
 
+    ImGui::GetIO().ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange; // Do not modify cursor from ImGui backend
+
     if (!ImGui_ImplWin32_Init(m_window.GetWindow()))
     {
         Log::Error("D3D12::InitializeImGui() - ImGui_ImplWin32_Init call failed!");

diff --git a/src/d3d12/D3D12_Hooks.cpp b/src/d3d12/D3D12_Hooks.cpp
@@ -8,17 +8,6 @@
 
 #include <VersionHelpers.h>
 
-void* ApplyHook(void** vtable, size_t index, void* target)
-{
-    DWORD oldProtect;
-    VirtualProtect(vtable + index, 8, PAGE_EXECUTE_READWRITE, &oldProtect);
-    const auto ret = vtable[index];
-    vtable[index] = target;
-    VirtualProtect(vtable + index, 8, oldProtect, nullptr);
-
-    return ret;
-}
-
 void* D3D12::CRenderNode_Present_InternalPresent(int32_t* apDeviceIndex, uint8_t aSomeSync, UINT aSyncInterval)
 {
     auto& d3d12 = CET::Get().GetD3D12();
@@ -80,10 +69,11 @@ ID3D12Device* D3D12::GetDevice() const
 std::tuple<D3D12_CPU_DESCRIPTOR_HANDLE, D3D12_GPU_DESCRIPTOR_HANDLE> D3D12::CreateTextureDescriptor()
 {
     const UINT handle_increment = m_pd3d12Device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV);
-    static std::atomic descriptor_index = 1;
+    static std::atomic descriptor_index = 1; // 0 is used for ImGui font texture
 
     const auto index = descriptor_index++;
 
+    // We allocate 200 descriptors
     if (index >= 200)
         return {{}, {}};
 

diff --git a/src/overlay/Overlay.cpp b/src/overlay/Overlay.cpp
@@ -18,7 +18,6 @@ void Overlay::PostInitialize()
 
             auto& d3d12 = CET::Get().GetD3D12();
             d3d12.DelayedSetTrapInputInImGui(true);
-            ClipToCenter(RED4ext::CGameEngine::Get()->unkD0);
         }
         else
         {
@@ -194,8 +193,6 @@ void Overlay::Update()
 
             auto& d3d12 = CET::Get().GetD3D12();
             d3d12.DelayedSetTrapInputInImGui(m_enabled);
-            auto* pEngine = RED4ext::CGameEngine::Get();
-            ClipToCenter(pEngine->unkD0);
             m_toggled = false;
         }
     }
@@ -211,9 +208,9 @@ void Overlay::Update()
     ImGui::RenderNotifications();
 
     //——————————————————————————————— WARNING ———————————————————————————————
-    // Argument MUST match the amount of ImGui::PushStyleVar() calls 
+    // Argument MUST match the amount of ImGui::PushStyleVar() calls
     ImGui::PopStyleVar(2);
-    // Argument MUST match the amount of ImGui::PushStyleColor() calls 
+    // Argument MUST match the amount of ImGui::PushStyleColor() calls
     ImGui::PopStyleColor(1);
 
     if (!m_enabled)
@@ -240,48 +237,6 @@ bool Overlay::IsInitialized() const noexcept
     return m_initialized;
 }
 
-BOOL Overlay::ClipToCenter(RED4ext::CGameEngine::UnkD0* apThis)
-{
-    const auto wnd = static_cast<HWND>(apThis->hWnd);
-    const HWND foreground = GetForegroundWindow();
-
-    if (wnd == foreground && apThis->unk174 && !apThis->unk164 && !CET::Get().GetOverlay().IsEnabled())
-    {
-        RECT rect;
-        GetClientRect(wnd, &rect);
-        ClientToScreen(wnd, reinterpret_cast<POINT*>(&rect.left));
-        ClientToScreen(wnd, reinterpret_cast<POINT*>(&rect.right));
-        rect.left = (rect.left + rect.right) / 2;
-        rect.right = rect.left;
-        rect.bottom = (rect.bottom + rect.top) / 2;
-        rect.top = rect.bottom;
-        apThis->isClipped = true;
-        ShowCursor(FALSE);
-        return ClipCursor(&rect);
-    }
-
-    if (apThis->isClipped)
-    {
-        apThis->isClipped = false;
-        return ClipCursor(nullptr);
-    }
-
-    return 1;
-}
-
-void Overlay::Hook()
-{
-    const RED4ext::UniversalRelocPtr<uint8_t> func(CyberEngineTweaks::AddressHashes::CWinapi_ClipToCenter);
-
-    if (auto* pLocation = func.GetAddr())
-    {
-        if (MH_CreateHook(pLocation, reinterpret_cast<void*>(&ClipToCenter), reinterpret_cast<void**>(&m_realClipToCenter)) != MH_OK || MH_EnableHook(pLocation) != MH_OK)
-            Log::Error("Could not hook mouse clip function!");
-        else
-            Log::Info("Hook mouse clip function!");
-    }
-}
-
 Overlay::Overlay(VKBindings& aBindings, Options& aOptions, PersistentState& aPersistentState, LuaVM& aVm)
     : m_console(aOptions, aPersistentState, aVm)
     , m_bindings(aBindings, aVm)
@@ -291,8 +246,6 @@ Overlay::Overlay(VKBindings& aBindings, Options& aOptions, PersistentState& aPer
     , m_persistentState(aPersistentState)
     , m_vm(aVm)
 {
-    Hook();
-
     GameMainThread::Get().AddBaseInitializationTask(
         [this]
         {

diff --git a/src/overlay/Overlay.h b/src/overlay/Overlay.h
@@ -7,8 +7,6 @@
 #include "widgets/GameLog.h"
 #include "widgets/ImGuiDebug.h"
 
-using TClipToCenter = HWND(RED4ext::CGameEngine::UnkD0*);
-
 struct Overlay
 {
     Overlay(VKBindings& aBindings, Options& aOptions, PersistentState& aPersistentState, LuaVM& aVm);
@@ -27,11 +25,6 @@ struct Overlay
 
     void Update();
 
-protected:
-    void Hook();
-
-    static BOOL ClipToCenter(RED4ext::CGameEngine::UnkD0* apThis);
-
 private:
     void DrawToolbar();
 
@@ -42,8 +35,6 @@ struct Overlay
     GameLog m_gameLog;
     ImGuiDebug m_imguiDebug;
 
-    TClipToCenter* m_realClipToCenter{nullptr};
-
     std::atomic_bool m_enabled{false};
     std::atomic_bool m_toggled{false};
     bool m_initialized{false};

diff --git a/src/reverse/Addresses.h b/src/reverse/Addresses.h
@@ -59,8 +59,8 @@ constexpr uint32_t CScript_TweakDBLoad = 3602585178UL;           // game::data::
 constexpr uint32_t CShutdownState_OnTick = 4069332669UL; // red::GameAppShutdownState::OnTick
 #pragma endregion
 
-#pragma region CWinapi
-constexpr uint32_t CWinapi_ClipToCenter = 261693736UL; // input::InputSystemWin32Base::Update
+#pragma region InputSystemWin32Base
+constexpr uint32_t InputSystemWin32Base_ForceCursor = 2130646213UL; // input::InputSystemWin32Base::ForceCursor
 #pragma endregion
 
 #pragma region gameIGameSystem