From b2a2d2c2bf306b6fb0d63d75e63351f239686a93 Mon Sep 17 00:00:00 2001
From: Lyall Stamper <lyall@stamper.net>
Date: Fri, 9 Feb 2024 00:00:08 +0000
Subject: [PATCH] Added screen percentage override.

---
 P3RFix.ini      | 10 +++++++++-
 src/dllmain.cpp | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/P3RFix.ini b/P3RFix.ini
index 8054f84..9da3e44 100644
--- a/P3RFix.ini
+++ b/P3RFix.ini
@@ -24,4 +24,12 @@ Enabled = true
 
 [Fix FOV]
 ; Fixes FOV.
-Enabled = true
\ No newline at end of file
+Enabled = true
+
+;;;;;;;;;; Graphical Tweaks ;;;;;;;;;;
+
+[Screen Percentage]
+; Overrides screen percentage (a.k.a render scale).
+; Set to >100 for downsampling and <100 to upsample.
+Enabled = false
+Value = 100
diff --git a/src/dllmain.cpp b/src/dllmain.cpp
index b28a9f4..dbc6a00 100644
--- a/src/dllmain.cpp
+++ b/src/dllmain.cpp
@@ -27,6 +27,8 @@ int iCustomResY;
 bool bHUDFix;
 bool bAspectFix;
 bool bFOVFix;
+bool bScreenPercentage;
+int iScreenPercentage;
 
 // Aspect ratio + HUD stuff
 float fPi = (float)3.141592653;
@@ -131,6 +133,8 @@ void ReadConfig()
     inipp::get_value(ini.sections["Fix HUD"], "Enabled", bHUDFix);
     inipp::get_value(ini.sections["Fix Aspect Ratio"], "Enabled", bAspectFix);
     inipp::get_value(ini.sections["Fix FOV"], "Enabled", bFOVFix);
+    inipp::get_value(ini.sections["Screen Percentage"], "Enabled", bScreenPercentage);
+    inipp::get_value(ini.sections["Screen Percentage"], "Value", iScreenPercentage);
 
     // Log config parse
     spdlog::info("Config Parse: iInjectionDelay: {}ms", iInjectionDelay);
@@ -140,6 +144,13 @@ void ReadConfig()
     spdlog::info("Config Parse: bHUDFix: {}", bHUDFix);
     spdlog::info("Config Parse: bAspectFix: {}", bAspectFix);
     spdlog::info("Config Parse: bFOVFix: {}", bFOVFix);
+    spdlog::info("Config Parse: bScreenPercentage: {}", bScreenPercentage);
+    spdlog::info("Config Parse: iScreenPercentage: {}", iScreenPercentage);
+    if (iScreenPercentage < 10 || iScreenPercentage > 400)
+    {
+        iScreenPercentage = std::clamp(iScreenPercentage, 10, 400);
+        spdlog::info("Config Parse: iScreenPercentage value invalid, clamped to {}", iScreenPercentage);
+    }
     spdlog::info("----------");
 
     // Calculate aspect ratio / use desktop res instead
@@ -555,6 +566,30 @@ void Fades()
     }
 }
 
+void GraphicalTweaks()
+{
+    if (bScreenPercentage)
+    {
+        // Screen Percentage
+        uint8_t* ScreenPercentageScanResult = Memory::PatternScan(baseModule, "0F ?? ?? F3 0F ?? ?? ?? 0F ?? ?? F3 0F ?? ?? ?? ?? ?? ?? 0F ?? ?? 77 ?? F3 0F ?? ?? ?? ?? ?? ?? 48 ?? ?? ?? ?? 48 ?? ?? 20 5F C3");
+        if (ScreenPercentageScanResult)
+        {
+            spdlog::info("Aspect Ratio: Address is {:s}+{:x}", sExeName.c_str(), (uintptr_t)ScreenPercentageScanResult - (uintptr_t)baseModule);
+            static SafetyHookMid ScreenPercentageMidHook{};
+            ScreenPercentageMidHook = safetyhook::create_mid(ScreenPercentageScanResult + 0x3,
+                [](SafetyHookContext& ctx)
+                {
+                    *reinterpret_cast<float*>(ctx.rdi + (ctx.rbx*4)) = (float)iScreenPercentage;
+                });
+
+        }
+        else if (!ScreenPercentageScanResult)
+        {
+            spdlog::error("Aspect Ratio: Pattern scan failed.");
+        }
+    }
+}
+
 DWORD __stdcall Main(void*)
 {
     Logging();
@@ -564,6 +599,7 @@ DWORD __stdcall Main(void*)
     AspectFOVFix();
     HUDFix();
     Fades();
+    GraphicalTweaks();
     return true;
 }