From df89374886689beeed68004987acf723bd504df1 Mon Sep 17 00:00:00 2001
From: FakeMichau <49685661+FakeMichau@users.noreply.github.com>
Date: Wed, 20 May 2026 15:14:59 +0200
Subject: [PATCH] Optionally hook ascii version of OutputDebug

---
 OptiScaler/hooks/Kernel_Hooks.cpp   | 15 +++++++++++++++
 OptiScaler/hooks/Kernel_Hooks.h     |  3 +++
 OptiScaler/proxies/Kernel32_Proxy.h |  1 +
 3 files changed, 19 insertions(+)

diff --git a/OptiScaler/hooks/Kernel_Hooks.cpp b/OptiScaler/hooks/Kernel_Hooks.cpp
index 3fd9c1ce..a958d989 100644
--- a/OptiScaler/hooks/Kernel_Hooks.cpp
+++ b/OptiScaler/hooks/Kernel_Hooks.cpp
@@ -248,6 +248,21 @@ VOID WINAPI KernelHooks::hk_K32_OutputDebugStringW(LPCWSTR lpOutputString)
     LOG_TRACE(L"{}", result);
 }
 
+VALIDATE_HOOK(hk_K32_OutputDebugStringA, Kernel32Proxy::PFN_OutputDebugStringA)
+VOID WINAPI KernelHooks::hk_K32_OutputDebugStringA(LPCSTR lpOutputString)
+{
+    o_K32_OutputDebugStringA(lpOutputString);
+
+    std::string result(lpOutputString);
+
+    while (!result.empty() && (result.back() == '\n' || result.back() == '\r'))
+    {
+        result.pop_back();
+    }
+
+    LOG_TRACE("{}", result);
+}
+
 // Load Library checks
 
 VALIDATE_HOOK(hk_K32_LoadLibraryW, Kernel32Proxy::PFN_LoadLibraryW)
diff --git a/OptiScaler/hooks/Kernel_Hooks.h b/OptiScaler/hooks/Kernel_Hooks.h
index fb69f0e6..ca45d9ad 100644
--- a/OptiScaler/hooks/Kernel_Hooks.h
+++ b/OptiScaler/hooks/Kernel_Hooks.h
@@ -32,6 +32,7 @@ class KernelHooks
     inline static Kernel32Proxy::PFN_GetFileAttributesW o_K32_GetFileAttributesW = nullptr;
     inline static Kernel32Proxy::PFN_CreateFileW o_K32_CreateFileW = nullptr;
     inline static Kernel32Proxy::PFN_OutputDebugStringW o_K32_OutputDebugStringW = nullptr;
+    inline static Kernel32Proxy::PFN_OutputDebugStringA o_K32_OutputDebugStringA = nullptr;
 
     inline static KernelBaseProxy::PFN_FreeLibrary o_KB_FreeLibrary = nullptr;
     inline static KernelBaseProxy::PFN_LoadLibraryA o_KB_LoadLibraryA = nullptr;
@@ -51,6 +52,7 @@ class KernelHooks
                                             LPSECURITY_ATTRIBUTES lpSecurityAttributes, DWORD dwCreationDisposition,
                                             DWORD dwFlagsAndAttributes, HANDLE hTemplateFile);
     static VOID WINAPI hk_K32_OutputDebugStringW(LPCWSTR lpOutputString);
+    static VOID WINAPI hk_K32_OutputDebugStringA(LPCSTR lpOutputString);
 
     static HMODULE hk_K32_LoadLibraryW(LPCWSTR lpLibFileName);
     static HMODULE hk_K32_LoadLibraryA(LPCSTR lpLibFileName);
@@ -80,6 +82,7 @@ class KernelHooks
 
 #ifdef HOOK_OUTPUT_DEBUG
         o_K32_OutputDebugStringW = Kernel32Proxy::Hook_OutputDebugStringW(hk_K32_OutputDebugStringW);
+        o_K32_OutputDebugStringA = Kernel32Proxy::Hook_OutputDebugStringA(hk_K32_OutputDebugStringA);
 #endif
 
         if (!Config::Instance()->UseNtdllHooks.value_or_default())
diff --git a/OptiScaler/proxies/Kernel32_Proxy.h b/OptiScaler/proxies/Kernel32_Proxy.h
index 8fec606f..c6b6e025 100644
--- a/OptiScaler/proxies/Kernel32_Proxy.h
+++ b/OptiScaler/proxies/Kernel32_Proxy.h
@@ -24,6 +24,7 @@
     X(GetModuleHandleExW)                                                                                              \
     X(GetFileAttributesW)                                                                                              \
     X(CreateFileW)                                                                                                     \
+    X(OutputDebugStringA)                                                                                              \
     X(OutputDebugStringW)
 
 class Kernel32Proxy