From 2ae5d4462f11a045f2355a74376baa46cde5d3a2 Mon Sep 17 00:00:00 2001
From: Emmanuel AYME <eayme44@gmail.com>
Date: Sun, 4 Jan 2026 21:28:36 +0100
Subject: [PATCH] Add Hotkeys and OSD manager libs

---
 libs/HotkeysManager.cpp | 32 ++++++++++++++++++++++++++++++++
 libs/OSDManager.cpp     | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)
 create mode 100644 libs/HotkeysManager.cpp
 create mode 100644 libs/OSDManager.cpp

diff --git a/libs/HotkeysManager.cpp b/libs/HotkeysManager.cpp
new file mode 100644
index 0000000..fe22034
--- /dev/null
+++ b/libs/HotkeysManager.cpp
@@ -0,0 +1,32 @@
+#include "HotkeysManager.h"
+#include <vector>
+
+struct Hotkey {
+    int vk;
+    Modifier mods;
+    std::function<void()> callback;
+    bool wasPressed = false;
+};
+
+static std::vector<Hotkey> g_hotkeys;
+
+static bool IsModifierDown(reshade::api::effect_runtime* rt, Modifier m) {
+    if ((int)m & (int)Modifier::Alt && !rt->is_key_down(VK_MENU))    return false;
+    if ((int)m & (int)Modifier::Ctrl && !rt->is_key_down(VK_CONTROL)) return false;
+    if ((int)m & (int)Modifier::Shift && !rt->is_key_down(VK_SHIFT))   return false;
+    return true;
+}
+
+void RegisterHotkey(int vk, Modifier mods, std::function<void()> callback) {
+    g_hotkeys.push_back({ vk, mods, std::move(callback) });
+}
+
+void ProcessHotkeys(reshade::api::effect_runtime* runtime) {
+    for (auto& hotkey : g_hotkeys) {
+        bool pressed = IsModifierDown(runtime, hotkey.mods) && runtime->is_key_down(hotkey.vk);
+
+        if (pressed && !hotkey.wasPressed) hotkey.callback();
+
+        hotkey.wasPressed = pressed;
+    }
+}
diff --git a/libs/OSDManager.cpp b/libs/OSDManager.cpp
new file mode 100644
index 0000000..6bbfe9a
--- /dev/null
+++ b/libs/OSDManager.cpp
@@ -0,0 +1,33 @@
+#include "OSDManager.h"
+
+static float g_timer = 0.0f;
+static OSDUpdateFn g_onUpdate;
+static OSDEndFn g_onEnd;
+
+void ShowOSD(float duration, OSDUpdateFn onUpdate, OSDEndFn onEnd) {
+    g_timer = duration;
+    g_onUpdate = std::move(onUpdate);
+    g_onEnd = std::move(onEnd);
+}
+
+void UpdateOSD(reshade::api::effect_runtime* runtime, float deltaTime) {
+    if (g_timer <= 0.0f) return;
+
+    g_timer -= deltaTime;
+
+    if (g_onUpdate) g_onUpdate(runtime);
+
+    if (g_timer <= 0.0f) {
+        if (g_onEnd) g_onEnd(runtime);
+
+        g_onUpdate = nullptr;
+        g_onEnd = nullptr;
+    }
+}
+
+void ResetAllUniformVariables(reshade::api::effect_runtime* runtime, const char* effect_name) {
+    runtime->enumerate_uniform_variables(effect_name, [runtime](reshade::api::effect_runtime* rt, reshade::api::effect_uniform_variable OSDvar) {
+        runtime->reset_uniform_value(OSDvar);
+    });
+}
+