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Dynamic FOV Changing with toggle variable in .ini #20

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Dynamic FOV Changing with toggle variable in .ini #20

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2d9bc4b
Added Dynamic FOV Changing with toggle variable in .ini
andrew101sanders Feb 9, 2025
f420c5f
Fixed accidental fFOVMulti off-by-one
andrew101sanders Feb 14, 2025
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3 changes: 3 additions & 0 deletions FF7RebirthFix.ini
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,9 @@ Global = false
; Adjust "Multiplier" to increase or decrease FOV.
; i.e for 20% higher FOV, set "Multiplier = 1.2"
Multiplier = 1
; Set "DynamicChanger" to true to enable the FOV changer
; FOV Multiplier is controllable in-game using Keypad 1-9 for "Multiplier" values 0.6-1.4. Keypad * is to toggle "Global".
DynamicChanger = true

[Subtitles]
; Adjust "Size" to increase or decrease the size of the subtitles. i.e for subtitles that are 25% smaller, set "Size" to 0.75
Expand Down
164 changes: 154 additions & 10 deletions src/dllmain.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,7 @@ bool bFixMovies;
float fFramerateLimit = 120.00f;
bool bGlobalFOVMulti;
float fFOVMulti;
bool bDynamicFOVChanger;
bool bAutoVignette;
float fVignetteStrength;
float fHUDResScale;
Expand Down Expand Up @@ -83,6 +84,16 @@ SDK::UVR_Top_C* UMGVRTop = nullptr;
SDK::UBattleTips_C* UMGBattleTips = nullptr;
SDK::UMainMenu_Top_Window_C* UMGMainMenu = nullptr;

// Function pointers
std::uint8_t* GameplayFOVScanResult = nullptr;
std::uint8_t* GameplayFOVAltScanResult = nullptr;
std::uint8_t* AspectRatioFOVScanResult = nullptr;

SafetyHookMid FOVMidHook{};
SafetyHookMid AspectRatioMidHook{};
SafetyHookMid GameplayFOVMidHook{};
SafetyHookMid GameplayFOVAltMidHook{};

void Logging()
{
// Get path to DLL
Expand Down Expand Up @@ -152,6 +163,7 @@ void Configuration()
inipp::get_value(ini.sections["Framerate"], "FPS", fFramerateLimit);
inipp::get_value(ini.sections["FOV"], "Global", bGlobalFOVMulti);
inipp::get_value(ini.sections["FOV"], "Multiplier", fFOVMulti);
inipp::get_value( ini.sections["FOV"], "DynamicChanger", bDynamicFOVChanger );
inipp::get_value(ini.sections["Subtitles"], "Size", fSubtitleScale);

inipp::get_value(ini.sections["Custom Resolution"], "Width", iCustomResX);
Expand Down Expand Up @@ -389,12 +401,17 @@ void CurrentResolution()

void AspectRatioFOV()
{

// Aspect ratio / FOV
AspectRatioFOVScanResult = Memory::PatternScan( exeModule, "C5 FA ?? ?? ?? 8B ?? ?? ?? ?? ?? 89 ?? ?? 0F B6 ?? ?? ?? ?? ?? 33 ?? ?? 83 ?? 01" );

// Gameplay FOV
GameplayFOVScanResult = Memory::PatternScan( exeModule, "C5 ?? ?? ?? ?? C5 ?? ?? ?? ?? ?? ?? ?? 45 8B ?? 49 8B ?? BE ?? ?? ?? ??" );
GameplayFOVAltScanResult = Memory::PatternScan( exeModule, "C4 ?? ?? ?? ?? ?? C4 ?? ?? ?? ?? ?? C4 ?? ?? ?? ?? C4 ?? ?? ?? ?? ?? 41 ?? ?? C5 ?? ?? ?? ?? ?? ?? ?? 45 ?? ?? ?? ?? ?? ??" );

if (bFixAspect || bGlobalFOVMulti) {
// Aspect ratio / FOV
std::uint8_t* AspectRatioFOVScanResult = Memory::PatternScan(exeModule, "C5 FA ?? ?? ?? 8B ?? ?? ?? ?? ?? 89 ?? ?? 0F B6 ?? ?? ?? ?? ?? 33 ?? ?? 83 ?? 01");
if (AspectRatioFOVScanResult) {
spdlog::info("Aspect Ratio/FOV: Address is {:s}+{:x}", sExeName.c_str(), AspectRatioFOVScanResult - (std::uint8_t*)exeModule);
static SafetyHookMid FOVMidHook{};
FOVMidHook = safetyhook::create_mid(AspectRatioFOVScanResult,
[](SafetyHookContext& ctx) {
// Fix vert- FOV when wider than 16:9
Expand All @@ -405,7 +422,6 @@ void AspectRatioFOV()
ctx.xmm1.f32[0] *= fFOVMulti;
});

static SafetyHookMid AspectRatioMidHook{};
AspectRatioMidHook = safetyhook::create_mid(AspectRatioFOVScanResult + 0xB,
[](SafetyHookContext& ctx) {
if (bFixAspect && !bMovieIsPlaying)
Expand Down Expand Up @@ -446,12 +462,9 @@ void AspectRatioFOV()
}

if (!bGlobalFOVMulti && fFOVMulti != 1.00f) {
// Gameplay FOV
std::uint8_t* GameplayFOVScanResult = Memory::PatternScan(exeModule, "C5 ?? ?? ?? ?? C5 ?? ?? ?? ?? ?? ?? ?? 45 8B ?? 49 8B ?? BE ?? ?? ?? ??");
std::uint8_t* GameplayFOVAltScanResult = Memory::PatternScan(exeModule, "C4 ?? ?? ?? ?? ?? C4 ?? ?? ?? ?? ?? C4 ?? ?? ?? ?? C4 ?? ?? ?? ?? ?? 41 ?? ?? C5 ?? ?? ?? ?? ?? ?? ?? 45 ?? ?? ?? ?? ?? ??");
if (GameplayFOVScanResult && GameplayFOVAltScanResult) {
spdlog::info("Gameplay FOV: Address is {:s}+{:x}", sExeName.c_str(), GameplayFOVScanResult - (std::uint8_t*)exeModule);
static SafetyHookMid GameplayFOVMidHook{};

GameplayFOVMidHook = safetyhook::create_mid(GameplayFOVScanResult,
[](SafetyHookContext& ctx) {
if (ctx.r13) {
Expand All @@ -462,7 +475,6 @@ void AspectRatioFOV()
});

spdlog::info("Gameplay FOV: Alt: Address is {:s}+{:x}", sExeName.c_str(), GameplayFOVAltScanResult - (std::uint8_t*)exeModule);
static SafetyHookMid GameplayFOVAltMidHook{};
GameplayFOVAltMidHook = safetyhook::create_mid(GameplayFOVAltScanResult,
[](SafetyHookContext& ctx) {
if (ctx.r13) {
Expand Down Expand Up @@ -1155,6 +1167,137 @@ void Misc()
*/
}

// Low-level keyboard hook procedure
LRESULT CALLBACK LowLevelKeyboardProc( int nCode, WPARAM wParam, LPARAM lParam )
{
if (nCode == HC_ACTION && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN))
{
KBDLLHOOKSTRUCT* pKey = (KBDLLHOOKSTRUCT*)lParam;
DWORD vk = pKey->vkCode;

if (vk == VK_MULTIPLY)
{
if (!(pKey->flags & KF_REPEAT))
{
bGlobalFOVMulti = !bGlobalFOVMulti;

if (bGlobalFOVMulti)
spdlog::info( "Global FOV multiplier enabled" );
else
spdlog::info( "Global FOV multiplier disabled" );
}
}

if (vk >= VK_NUMPAD1 && vk <= VK_NUMPAD9)
{
// Check if the key was previously up (not a repeat)
if (!(pKey->flags & KF_REPEAT))
{
int keyIndex = vk - VK_NUMPAD1;
fFOVMulti = 0.6f + (keyIndex) * 0.1f;

spdlog::info( "FOV multiplier set to {:.1f}", fFOVMulti );
}
}

// This list of keys needs to change depending on whatever keys are used to change fov or toggle global fov multiplier (or other features)
if ((vk >= VK_NUMPAD1 && vk <= VK_NUMPAD9) ||
vk == VK_MULTIPLY)
{
if (!(pKey->flags & KF_REPEAT))
{
FOVMidHook.reset();
AspectRatioMidHook.reset();
GameplayFOVMidHook.reset();
GameplayFOVAltMidHook.reset();

if (bFixAspect || bGlobalFOVMulti)
{
if (AspectRatioFOVScanResult)
{
FOVMidHook = safetyhook::create_mid( AspectRatioFOVScanResult,
[]( SafetyHookContext& ctx ) {
// Fix vert- FOV when wider than 16:9
if (bFixAspect && fAspectRatio > fNativeAspect)
ctx.xmm1.f32[0] = atanf( tanf( ctx.xmm1.f32[0] * (fPi / 360) ) / fNativeAspect * fAspectRatio ) * (360 / fPi);

if (bGlobalFOVMulti)
ctx.xmm1.f32[0] *= fFOVMulti;
} );

AspectRatioMidHook = safetyhook::create_mid( AspectRatioFOVScanResult + 0xB,
[]( SafetyHookContext& ctx ) {
if (bFixAspect && !bMovieIsPlaying)
ctx.rax = *(uint32_t*)(&fAspectRatio);
} );
}
else
{
spdlog::error( "Aspect Ratio/FOV: Pattern invalid so no FOV changes made." );
}
}

if (!bGlobalFOVMulti && fFOVMulti != 1.00f)
{
if (GameplayFOVScanResult && GameplayFOVAltScanResult)
{
GameplayFOVMidHook = safetyhook::create_mid( GameplayFOVScanResult,
[]( SafetyHookContext& ctx ) {
if (ctx.r13)
{
auto CamType = static_cast<SDK::EEndCameraOperatorType>(ctx.r13);
if (CamType == SDK::EEndCameraOperatorType::Field || CamType == SDK::EEndCameraOperatorType::Battle)
ctx.xmm0.f32[0] *= fFOVMulti;
}
} );

GameplayFOVAltMidHook = safetyhook::create_mid( GameplayFOVAltScanResult,
[]( SafetyHookContext& ctx ) {
if (ctx.r13)
{
auto CamType = static_cast<SDK::EEndCameraOperatorType>(ctx.r13);
if (CamType == SDK::EEndCameraOperatorType::Field || CamType == SDK::EEndCameraOperatorType::Battle)
ctx.xmm0.f32[0] *= fFOVMulti;
}
} );
}
else
{
spdlog::error( "Gameplay FOV: Pattern(s) invalid so no FOV changes made." );
}
}
}
}
}
return CallNextHookEx( nullptr, nCode, wParam, lParam );
}

void FOVChanger()
{

if (!bDynamicFOVChanger)
{
spdlog::info( "Dynamic FOV Changer: Disabled" );
return;
}

HHOOK hHook = SetWindowsHookEx( WH_KEYBOARD_LL, LowLevelKeyboardProc, thisModule, 0 );
if (!hHook)
{
spdlog::error( "Failed to install keyboard hook: {}", GetLastError() );
return;
}

MSG msg;
while (GetMessage( &msg, nullptr, 0, 0 ) > 0)
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}

UnhookWindowsHookEx( hHook );
}

DWORD __stdcall Main(void*)
{
Logging();
Expand All @@ -1165,6 +1308,7 @@ DWORD __stdcall Main(void*)
HUD();
Graphics();
Misc();
FOVChanger();

return true;
}
Expand All @@ -1188,4 +1332,4 @@ BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReser
break;
}
return TRUE;
}
}