Create acrylic-effect-radius-changer.wh.cpp

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mods/acrylic-effect-radius-changer.wh.cpp

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+// ==WindhawkMod==
+// @id              acrylic-effect-radius-changer
+// @name            Acrylic Effect Radius Changer
+// @description     Allows the user to change the Acrylic effect blur radius
+// @version         1.0.0
+// @author          Dulappy
+// @github          https://github.com/Dulappy
+// @include         dwm.exe
+// ==/WindhawkMod==
+
+// ==WindhawkModReadme==
+/*
+# Acrylic blur radius changer
+By default, the Acrylic effect comes with a blur radius of 30, both horizontally and vertically, while not allowing developers or users to modify it. This mod allows the user to modify the default blur radius across **all** apps that utilize the Acrylic effect, by injecting into DWM and hooking all functions necessary to set the aforementioned blur radius.
+
+## ⚠ Important usage note ⚠
+
+In order to use this mod, you must enable Windhawk to inject into system processes in its advanced settings.
+If you do not do this, it will silently fail to inject. **Changing the Windhawk advanced settings will also
+affect any other mod you have installed, and may cause instability as any other mod that injects into all
+processes will now inject into system processes too.**
+
+This mod will not work on portable versions of Windhawk because DWM is a protected process and can only be
+modified by a system account. Since the portable version of Windhawk only runs as administrator under your
+own user account, it will not have the privilege required to inject into DWM.
+
+## Examples
+You can scroll down to see some examples of different custom blur radii in action:
+
+![Default radius](https://i.imgur.com/AZM5rzq.png) \
+*Default blur radius (30x30)*
+
+
+![Custom radius lite](https://i.imgur.com/kDj5G4l.png) \
+*Custom blur radius (4x4)*
+
+
+![Custom radius customized](https://i.imgur.com/GA1meqE.png) \
+*Custom blur radius (24x2)*
+
+*/
+// ==/WindhawkModReadme==
+
+// ==WindhawkModSettings==
+/*
+- radius:
+  - width: 30
+  - height: 30
+  $name: Blur radius
+  $description: Set the radius of the Acrylic blur effect to any number
+*/
+// ==/WindhawkModSettings==
+
+#include <d2d1.h>
+#include <d2d1effects.h>
+#include <dcommon.h>
+
+struct {
+    int width;
+    int height;
+} settings;
+
+void LoadSettings() {
+    settings.width = Wh_GetIntSetting(L"radius.width");
+    settings.height = Wh_GetIntSetting(L"radius.height");
+}
+
+long (*CCustomBlur_BuildEffect_orig)(void* pThis, ID2D1Image* image, D2D_RECT_F*, D2D_SIZE_F*, DWORD, D2D_VECTOR_2F*, D2D_VECTOR_2F*);
+
+long CCustomBlur_BuildEffect_Hook(void* pThis, ID2D1Image* image, D2D_RECT_F* blurrect, D2D_SIZE_F* blurradius, DWORD optimization, D2D_VECTOR_2F* vector1, D2D_VECTOR_2F* vector2) {
+    blurradius->width = (float)settings.width;
+    blurradius->height = (float)settings.height;
+    Wh_Log(L"%i", settings.width);
+    return CCustomBlur_BuildEffect_orig(pThis, image, blurrect, blurradius, optimization, vector1, vector2);
+}
+
+float (*CCustomBlur_DetermineOutputScale_orig)(float, float, DWORD);
+
+float CCustomBlur_DetermineOutputScale_Hook(float f1, float f2, DWORD optimization) {
+    f1 = 0; // Makes the effect slightly less optimized, but makes it look significantly better in some cases
+    f2 = 0; // In a future update, I might try to reimplement the lost optimization.
+
+    return CCustomBlur_DetermineOutputScale_orig(f1, f2, optimization);
+}
+
+// The mod is being initialized, load settings, hook functions, and do other
+// initialization stuff if required.
+BOOL Wh_ModInit() {	
+    HMODULE dwmcore = GetModuleHandle(L"dwmcore.dll");
+    if (!dwmcore) return FALSE;
+
+    WH_FIND_SYMBOL findSymbol;
+    HANDLE findSymbolHandle = Wh_FindFirstSymbol(dwmcore, nullptr, &findSymbol);
+    if (!findSymbolHandle) {
+        Wh_Log(L"Wh_FindFirstSymbol failed");
+        return FALSE;
+    }
+
+    void* DetermineOutputScaleAddr = nullptr;
+    void* BuildEffectAddr = nullptr;
+
+    do {
+        if (_wcsicmp(findSymbol.symbol, L"public: static float __cdecl CCustomBlur::DetermineOutputScale(float,float,enum D2D1_GAUSSIANBLUR_OPTIMIZATION)") == 0) {
+            DetermineOutputScaleAddr = findSymbol.address;
+            Wh_Log(L"symbol: %s, Addr: %i", findSymbol.symbol, findSymbol.address);
+        }
+        else if (_wcsicmp(findSymbol.symbol, L"public: long __cdecl CCustomBlur::BuildEffect(struct ID2D1Image *,struct D2D_RECT_F const &,struct D2D_SIZE_F const &,enum D2D1_GAUSSIANBLUR_OPTIMIZATION,struct D2D_VECTOR_2F const &,struct D2D_VECTOR_2F *)") == 0) {
+            BuildEffectAddr = findSymbol.address;
+            Wh_Log(L"symbol: %s, Addr: %i", findSymbol.symbol, findSymbol.address);
+        }
+        /*else {
+            Wh_Log(L"symbol: %s", findSymbol.symbol);
+        }*/
+    } while (Wh_FindNextSymbol(findSymbolHandle, &findSymbol));
+
+    Wh_SetFunctionHook(DetermineOutputScaleAddr, (void*)CCustomBlur_DetermineOutputScale_Hook, (void**)&CCustomBlur_DetermineOutputScale_orig);
+
+    Wh_SetFunctionHook(BuildEffectAddr, (void*)CCustomBlur_BuildEffect_Hook, (void**)&CCustomBlur_BuildEffect_orig);
+
+    Wh_FindCloseSymbol(findSymbolHandle);
+
+    LoadSettings();
+
+    return TRUE;
+}
+
+// The mod is being unloaded, free all allocated resources.
+void Wh_ModUninit() {
+    Wh_Log(L"Uninit");
+}
+
+// The mod setting were changed, reload them.
+void Wh_ModSettingsChanged() {
+    Wh_Log(L"SettingsChanged");
+
+    LoadSettings();
+}