Use shared font atlas and fix crash when opening overlay in some games.

overlay_experimental/Renderer_Detector.cpp

@@ -26,19 +26,12 @@
 #include "System/System.h"
 #include "System/Library.h"
 #include "System/ScopedLock.hpp"
+#define GLAD_GL_IMPLEMENTATION
+#include <glad/gl.h>
 
 #if defined(WIN64) || defined(_WIN64) || defined(__MINGW64__) \
  || defined(WIN32) || defined(_WIN32) || defined(__MINGW32__)
     #define RENDERERDETECTOR_OS_WINDOWS
-#elif defined(__linux__) || defined(linux)
-    #define RENDERERDETECTOR_OS_LINUX
-#elif defined(__APPLE__)
-    #define RENDERERDETECTOR_OS_APPLE
-#endif
-
-#ifdef RENDERERDETECTOR_OS_WINDOWS
-#define GLAD_GL_IMPLEMENTATION
-#include <glad/gl.h>
   
     #include "windows/DX12_Hook.h"
     #include "windows/DX11_Hook.h"
@@ -55,6 +48,18 @@
         #undef GetModuleHandle
     #endif
 
+#elif defined(__linux__) || defined(linux)
+    #define RENDERERDETECTOR_OS_LINUX
+
+    #include "linux/OpenGLX_Hook.h"
+
+#elif defined(__APPLE__)
+    #define RENDERERDETECTOR_OS_APPLE
+
+    #include "macosx/OpenGL_Hook.h"
+
+#endif
+
 class Renderer_Detector
 {
     static Renderer_Detector* instance;
@@ -68,63 +73,29 @@ public:
         return instance;
     }
 
-    static void deleteInst()
-    {
-        if (instance != nullptr)
-        {
-            delete instance;
-            instance = nullptr;
-        }
-    }
+#if defined(RENDERERDETECTOR_OS_WINDOWS)
+#define RENDERER_HOOKS { OpenGL_Hook::DLL_NAME, &Renderer_Detector::hook_opengl },\
+                       { Vulkan_Hook::DLL_NAME, &Renderer_Detector::hook_vulkan },\
+                       {   DX12_Hook::DLL_NAME, &Renderer_Detector::hook_dx12   },\
+                       {   DX11_Hook::DLL_NAME, &Renderer_Detector::hook_dx11   },\
+                       {   DX10_Hook::DLL_NAME, &Renderer_Detector::hook_dx10   },\
+                       {    DX9_Hook::DLL_NAME, &Renderer_Detector::hook_dx9    },
 
     ~Renderer_Detector()
     {
+        stop_detection();
+
         delete dx9_hook;
         delete dx10_hook;
         delete dx11_hook;
         delete dx12_hook;
         delete opengl_hook;
         delete vulkan_hook;
+
+        instance = nullptr;
     }
 
 private:
-    Renderer_Detector():
-        dxgi_hooked(false),
-        dxgi1_2_hooked(false),
-        dx12_hooked(false),
-        dx11_hooked(false),
-        dx10_hooked(false),
-        dx9_hooked(false),
-        opengl_hooked(false),
-        vulkan_hooked(false),
-        renderer_hook(nullptr),
-        dx9_hook(nullptr),
-        dx10_hook(nullptr),
-        dx11_hook(nullptr),
-        dx12_hook(nullptr),
-        opengl_hook(nullptr),
-        vulkan_hook(nullptr),
-        detection_done(false),
-        force_done(false)
-    {
-        std::wstring tmp(4096, L'\0');
-        tmp.resize(GetSystemDirectoryW(&tmp[0], tmp.size()));
-        _SystemDir = System::Encoding::WCharToUtf8(tmp);
-
-        System::String::ToLower(_SystemDir);
-
-        wchar_t random_str[] = L"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
-        std::random_device rd;
-        std::mt19937_64 gen(rd());
-
-        std::uniform_int_distribution<uint64_t> dis(0, 61);
-        _WindowClassName.resize(64);
-        for (int i = 0; i < 64; ++i)
-            _WindowClassName[i] = random_str[dis(gen)];
-    }
-
-    std::timed_mutex detector_mutex;
-    std::mutex renderer_mutex;
 
     decltype(&IDXGISwapChain::Present)       IDXGISwapChainPresent;
     decltype(&IDXGISwapChain1::Present1)     IDXGISwapChainPresent1;
@@ -143,8 +114,6 @@ private:
     bool opengl_hooked;
     bool vulkan_hooked;
 
-    Base_Hook detection_hooks;
-    ingame_overlay::Renderer_Hook* renderer_hook;
     DX12_Hook* dx12_hook;
     DX11_Hook* dx11_hook;
     DX10_Hook* dx10_hook;
@@ -152,15 +121,47 @@ private:
     OpenGL_Hook* opengl_hook;
     Vulkan_Hook* vulkan_hook;
 
-    bool detection_done, force_done;
-    std::condition_variable stop_detection_cv;
-    std::mutex stop_detection_mutex;
-
     HWND dummyWindow = nullptr;
     std::wstring _WindowClassName;
     std::string _SystemDir;
     ATOM atom = 0;
 
+    Renderer_Detector() :
+        dxgi_hooked(false),
+        dxgi1_2_hooked(false),
+        dx12_hooked(false),
+        dx11_hooked(false),
+        dx10_hooked(false),
+        dx9_hooked(false),
+        opengl_hooked(false),
+        vulkan_hooked(false),
+        renderer_hook(nullptr),
+        dx9_hook(nullptr),
+        dx10_hook(nullptr),
+        dx11_hook(nullptr),
+        dx12_hook(nullptr),
+        opengl_hook(nullptr),
+        vulkan_hook(nullptr),
+        detection_done(false),
+        detection_count(0),
+        detection_cancelled(false)
+    {
+        std::wstring tmp(4096, L'\0');
+        tmp.resize(GetSystemDirectoryW(&tmp[0], tmp.size()));
+        _SystemDir = System::Encoding::WCharToUtf8(tmp);
+
+        System::String::ToLower(_SystemDir);
+
+        wchar_t random_str[] = L"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+        std::random_device rd;
+        std::mt19937_64 gen(rd());
+
+        std::uniform_int_distribution<uint64_t> dis(0, 61);
+        _WindowClassName.resize(64);
+        for (int i = 0; i < 64; ++i)
+            _WindowClassName[i] = random_str[dis(gen)];
+    }
+
     std::string FindPreferedModulePath(std::string const& name)
     {
         std::string res;
@@ -982,7 +983,8 @@ private:
             phyDevices.resize(count);
             vkEnumeratePhysicalDevices(instance, &count, phyDevices.data());
 
-            [&]() {
+            [&]()
+            {// Lambda for nested for break.
                 VkPhysicalDeviceProperties props{};
                 std::vector<VkExtensionProperties> ext_props;
 
@@ -1041,65 +1043,13 @@ private:
         }
     }
 
-public:
-    ingame_overlay::Renderer_Hook* detect_renderer(std::chrono::milliseconds timeout)
+    bool EnterDetection()
     {
-        std::unique_lock<std::timed_mutex> detection_lock(detector_mutex, std::defer_lock);
-        
-        if (!detection_lock.try_lock_for(timeout))
-            return nullptr;
-
-        {
-            std::lock_guard<std::mutex> lk(renderer_mutex);
-            if (detection_done)
-            {
-                if (renderer_hook != nullptr || force_done)
-                    return renderer_hook;
-
-                detection_done = false;
+        return CreateHWND() != nullptr;
     }
 
-            if (CreateHWND() == nullptr)
+    void ExitDetection()
     {
-                return nullptr;
-            }
-        }
-
-        SPDLOG_TRACE("Started renderer detection.");
-
-        std::pair<std::string, void(Renderer_Detector::*)(std::string const&)> libraries[]{
-            {OpenGL_Hook::DLL_NAME, &Renderer_Detector::hook_opengl},
-            {Vulkan_Hook::DLL_NAME, &Renderer_Detector::hook_vulkan},
-            {  DX12_Hook::DLL_NAME, &Renderer_Detector::hook_dx12  },
-            {  DX11_Hook::DLL_NAME, &Renderer_Detector::hook_dx11  },
-            {  DX10_Hook::DLL_NAME, &Renderer_Detector::hook_dx10  },
-            {   DX9_Hook::DLL_NAME, &Renderer_Detector::hook_dx9   },
-        };
-        std::string name;
-
-        auto start_time = std::chrono::steady_clock::now();
-        do
-        {
-            std::unique_lock<std::mutex> lck(stop_detection_mutex);
-            if (detection_done)
-                break;
-
-            for (auto const& library : libraries)
-            {
-                void* lib_handle = System::Library::GetLibraryHandle(library.first.c_str());
-                if (lib_handle != nullptr)
-                {
-                    std::lock_guard<std::mutex> lk(renderer_mutex);
-                    name = FindPreferedModulePath(library.first);
-                    (this->*library.second)(name);
-                }
-            }
-
-            stop_detection_cv.wait_for(lck, std::chrono::milliseconds{ 100 });
-        } while (!detection_done && (timeout.count() == -1 || (std::chrono::steady_clock::now() - start_time) <= timeout));
-
-        {
-            std::lock_guard<std::mutex> lk(renderer_mutex);
         DestroyHWND();
 
         detection_done = true;
@@ -1122,74 +1072,42 @@ public:
         delete vulkan_hook; vulkan_hook = nullptr;
     }
 
-        SPDLOG_TRACE("Renderer detection done {}.", (void*)renderer_hook);
-
-        return renderer_hook;
-    }
-
-    void stop_detection()
-    {
-        {
-            System::scoped_lock lk(renderer_mutex, stop_detection_mutex);
-            detection_done = true;
-            force_done = true;
-        }
-        stop_detection_cv.notify_all();
-    }
-};
-
-Renderer_Detector* Renderer_Detector::instance = nullptr;
-
 #elif defined(RENDERERDETECTOR_OS_LINUX)
-#define GLAD_GL_IMPLEMENTATION
-#include <glad/gl.h>
-
-#include "linux/OpenGLX_Hook.h"
-
-class Renderer_Detector
-{
-    static Renderer_Detector* instance;
-public:
-    static Renderer_Detector* Inst()
-    {
-        if (instance == nullptr)
-        {
-            instance = new Renderer_Detector;
-        }
-        return instance;
-    }
+#define RENDERER_HOOKS { OpenGLX_Hook::DLL_NAME, &Renderer_Detector::hook_openglx },
 
     ~Renderer_Detector()
     {
+        stop_detection();
+
         delete openglx_hook;
         //delete vulkan_hook;
+
+        instance = nullptr;
     }
 
 private:
-    Renderer_Detector() :
-        openglx_hooked(false),
-        renderer_hook(nullptr),
-        openglx_hook(nullptr),
-        //vulkan_hook(nullptr),
-        detection_done(false)
-    {}
-
-    std::timed_mutex detector_mutex;
-    std::mutex renderer_mutex;
-
-    Base_Hook detection_hooks;
-
     decltype(::glXSwapBuffers)* glXSwapBuffers;
 
     bool openglx_hooked;
     //bool vulkan_hooked;
 
-    ingame_overlay::Renderer_Hook* renderer_hook;
     OpenGLX_Hook* openglx_hook;
+    //Vulkan_Hook* vulkan_hook;
 
-    bool detection_done;
-    std::condition_variable stop_detection_cv;
-    std::mutex stop_detection_mutex;
+    Renderer_Detector() :
+        openglx_hooked(false),
+        renderer_hook(nullptr),
+        openglx_hook(nullptr),
+        //vulkan_hook(nullptr),
+        detection_done(false),
+        detection_count(0),
+        detection_cancelled(false)
+    {}
+
+    std::string FindPreferedModulePath(std::string const& name)
+    {
+        return name;
+    }
 
     static void MyglXSwapBuffers(Display* dpy, GLXDrawable drawable)
     {
@@ -1248,128 +1166,57 @@ private:
         }
     }
 
-public:
-    ingame_overlay::Renderer_Hook* detect_renderer(std::chrono::milliseconds timeout)
+    bool EnterDetection()
     {
-        std::pair<const char*, void(Renderer_Detector::*)(std::string const&)> libraries[]{
-            std::pair<const char*, void(Renderer_Detector::*)(std::string const&)>{OpenGLX_Hook::DLL_NAME, &Renderer_Detector::hook_openglx},
-        };
-
-        std::unique_lock<std::timed_mutex> detection_lock(detector_mutex, std::defer_lock);
-
-        if (!detection_lock.try_lock_for(timeout))
-            return nullptr;
-
-        {
-            std::lock_guard<std::mutex> lk(renderer_mutex);
-            if (detection_done)
-            {
-                if (renderer_hook != nullptr || force_done)
-                    return renderer_hook;
-
-                detection_done = false;
-            }
+        return true;
     }
 
-        SPDLOG_TRACE("Started renderer detection.");
-
-        auto start_time = std::chrono::steady_clock::now();
-        do
+    void ExitDetection()
     {
-            std::unique_lock<std::mutex> lck(stop_detection_mutex);
-            if (detection_done)
-                break;
-
-            for (auto const& library : libraries)
-            {
-                void* lib_handle = System::Library::GetLibraryHandle(library.first);
-                if (lib_handle != nullptr)
-                {
-                    std::lock_guard<std::mutex> lk(renderer_mutex);
-                    std::string lib_path = System::Library::GetLibraryPath(lib_handle);
-                    (this->*library.second)(lib_path);
-                }
-            }
-            
-            stop_detection_cv.wait_for(lck, std::chrono::milliseconds{ 100 });
-        } while (!detection_done && (timeout.count() == -1 || (std::chrono::steady_clock::now() - start_time) <= timeout));
-
-        {
-            std::lock_guard<std::mutex> lk(renderer_mutex);
-            
         detection_done = true;
         detection_hooks.UnhookAll();
 
         openglx_hooked = false;
+        //vulkan_hooked = false;
 
         delete openglx_hook; openglx_hook = nullptr;
         //delete vulkan_hook; vulkan_hook = nullptr;
     }
 
-        SPDLOG_TRACE("Renderer detection done {}.", (void*)renderer_hook);
-
-        return renderer_hook;
-    }
-
-    void stop_detection()
-    {
-        {
-            System::scoped_lock lk(renderer_mutex, stop_detection_mutex);
-            detection_done = true;
-            force_done = true;
-        }
-        stop_detection_cv.notify_all();
-    }
-};
-
-Renderer_Detector* Renderer_Detector::instance = nullptr;
-
 #elif defined(RENDERERDETECTOR_OS_APPLE)
-#include "macosx/OpenGL_Hook.h"
-#define GLAD_GL_IMPLEMENTATION
-#include <glad/gl.h>
-
-class Renderer_Detector
-{
-   static Renderer_Detector* instance;
-public:
-   static Renderer_Detector* Inst()
-   {
-       if (instance == nullptr)
-       {
-           instance = new Renderer_Detector;
-       }
-       return instance;
-   }
+#define RENDERER_HOOKS { OpenGL_Hook::DLL_NAME, & Renderer_Detector::hook_opengl },
 
     ~Renderer_Detector()
     {
+        stop_detection();
+
         delete opengl_hook;
+
+        instance = nullptr;
     }
 
 private:
+    decltype(::CGLFlushDrawable)* CGLFlushDrawable;
+
+    bool opengl_hooked;
+    //bool metal_hooked;
+
+    OpenGL_Hook* opengl_hook;
+    //Metal_Hook* metal_hook;
+
     Renderer_Detector() :
         opengl_hooked(false),
         renderer_hook(nullptr),
         opengl_hook(nullptr),
-       detection_done(false)
+        detection_done(false),
+        detection_count(0),
+        detection_cancelled(false)
     {}
 
-   std::timed_mutex detector_mutex;
-   std::mutex renderer_mutex;
-
-   Base_Hook detection_hooks;
-
-   decltype(::CGLFlushDrawable)* CGLFlushDrawable;
-
-   bool opengl_hooked;
-
-   ingame_overlay::Renderer_Hook* renderer_hook;
-   OpenGL_Hook* opengl_hook;
-
-   bool detection_done;
-   std::condition_variable stop_detection_cv;
-   std::mutex stop_detection_mutex;
+    std::string FindPreferedModulePath(std::string const& name)
+    {
+        return name;
+    }
 
     static int64_t MyCGLFlushDrawable(CGLDrawable_t* glDrawable)
     {
@@ -1428,89 +1275,164 @@ private:
         }
     }
 
-public:
-    ingame_overlay::Renderer_Hook* detect_renderer(std::chrono::milliseconds timeout)
+    bool EnterDetection()
     {
-       std::pair<const char*, void(Renderer_Detector::*)(std::string const&)> libraries[]{
-           std::pair<const char*, void(Renderer_Detector::*)(std::string const&)>{OpenGL_Hook::DLL_NAME, &Renderer_Detector::hook_opengl}
-       };
+        return true;
+    }
 
+    void ExitDetection()
+    {
+        detection_done = true;
+        detection_hooks.UnhookAll();
+
+        opengl_hooked = false;
+        //metal_hooked = false;
+
+        delete opengl_hook; opengl_hook = nullptr;
+        //delete metal_hook; metal_hook = nullptr;
+    }
+
+#endif
+
+private:
+    std::timed_mutex detector_mutex;
+    std::mutex renderer_mutex;
+
+    Base_Hook detection_hooks;
+    ingame_overlay::Renderer_Hook* renderer_hook;
+    
+    bool detection_done;
+    uint32_t detection_count;
+    bool detection_cancelled;
+    std::condition_variable stop_detection_cv;
+    std::mutex stop_detection_mutex;
+
+public:
+    std::future<ingame_overlay::Renderer_Hook*> detect_renderer(std::chrono::milliseconds timeout)
+    {
+        std::lock_guard<std::mutex> lk(stop_detection_mutex);
+
+        if (detection_count == 0)
+        {// If we have no detections in progress, restart detection.
+            detection_cancelled = false;
+        }
+
+        ++detection_count;
+
+        return std::async(std::launch::async, [this, timeout]() -> ingame_overlay::Renderer_Hook*
+        {
             std::unique_lock<std::timed_mutex> detection_lock(detector_mutex, std::defer_lock);
+            constexpr std::chrono::milliseconds infinite_timeout{ -1 };
         
             if (!detection_lock.try_lock_for(timeout))
                 return nullptr;
 
+            bool cancel = false;
+            {
+                System::scoped_lock lk(renderer_mutex, stop_detection_mutex);
+
+                if (!detection_cancelled)
                 {
-           std::lock_guard<std::mutex> lk(renderer_mutex);
                     if (detection_done)
                     {
-               if (renderer_hook != nullptr || force_done)
-                   return renderer_hook;
-
+                        if (renderer_hook == nullptr)
+                        {// Renderer detection was run but we didn't find it, restart the detection
                             detection_done = false;
                         }
+                        else
+                        {// Renderer already detected, cancel detection and return the renderer.
+                            cancel = true;
+                        }
+                    }
+
+                    if (!EnterDetection())
+                        cancel = true;
+                }
+                else
+                {// Detection was cancelled, cancel this detection
+                    cancel = true;
+                }
+            }
+
+            if (cancel)
+            {
+                --detection_count;
+                stop_detection_cv.notify_all();
+                return renderer_hook;
             }
 
             SPDLOG_TRACE("Started renderer detection.");
 
+            std::pair<std::string, void(Renderer_Detector::*)(std::string const&)> libraries[]{
+                RENDERER_HOOKS
+            };
+            std::string name;
+
             auto start_time = std::chrono::steady_clock::now();
             do
             {
                 std::unique_lock<std::mutex> lck(stop_detection_mutex);
-           if (detection_done)
+                if (detection_cancelled || detection_done)
                     break;
 
                 for (auto const& library : libraries)
                 {
-               void* lib_handle = System::Library::GetLibraryHandle(library.first);
+                    std::string lib_path = FindPreferedModulePath(library.first);
+                    if (!lib_path.empty())
+                    {
+                        void* lib_handle = System::Library::GetLibraryHandle(lib_path.c_str());
                         if (lib_handle != nullptr)
                         {
                             std::lock_guard<std::mutex> lk(renderer_mutex);
-                   std::string lib_path = System::Library::GetLibraryPath(lib_handle);
-                   (this->*library.second)(lib_path);
+                            (this->*library.second)(System::Library::GetLibraryPath(lib_handle));
+                        }
                     }
                 }
 
                 stop_detection_cv.wait_for(lck, std::chrono::milliseconds{ 100 });
-       } while (!detection_done && (timeout.count() == -1 || (std::chrono::steady_clock::now() - start_time) <= timeout));
+            } while (timeout == infinite_timeout || (std::chrono::steady_clock::now() - start_time) <= timeout);
 
             {
-           std::lock_guard<std::mutex> lk(renderer_mutex);
+                System::scoped_lock lk(renderer_mutex, stop_detection_mutex);
                 
-           detection_done = true;
-           detection_hooks.UnhookAll();
+                ExitDetection();
 
-           opengl_hooked = false;
-
-           delete opengl_hook; opengl_hook = nullptr;
-           //delete vulkan_hook; vulkan_hook = nullptr;
+                --detection_count;
             }
+            stop_detection_cv.notify_all();
 
             SPDLOG_TRACE("Renderer detection done {}.", (void*)renderer_hook);
 
             return renderer_hook;
+        });
     }
 
     void stop_detection()
     {
+        {
+            std::lock_guard<std::mutex> lk(stop_detection_mutex);
+            if (detection_count == 0)
+                return;
+        }
         {
             System::scoped_lock lk(renderer_mutex, stop_detection_mutex);
-           detection_done = true;
-           force_done = true;
+            detection_cancelled = true;
         }
         stop_detection_cv.notify_all();
+        {
+            std::unique_lock<std::mutex> lk(stop_detection_mutex);
+            stop_detection_cv.wait(lk, [&]() { return detection_count == 0; });
+        }
     }
 };
 
 Renderer_Detector* Renderer_Detector::instance = nullptr;
 
-#endif
-
 namespace ingame_overlay {
 
 std::future<ingame_overlay::Renderer_Hook*> DetectRenderer(std::chrono::milliseconds timeout)
 {
-    return std::async(std::launch::async, &Renderer_Detector::detect_renderer, Renderer_Detector::Inst(), timeout);
+    return Renderer_Detector::Inst()->detect_renderer(timeout);
 }
 
 void StopRendererDetection()
@@ -1518,9 +1440,9 @@ void StopRendererDetection()
     Renderer_Detector::Inst()->stop_detection();
 }
 
-void FreeRendererDetection()
+void FreeDetector()
 {
-    Renderer_Detector::deleteInst();
+    delete Renderer_Detector::Inst();
 }
 
 }

overlay_experimental/Renderer_Detector.h

@@ -31,5 +31,6 @@ namespace ingame_overlay {
 
 std::future<Renderer_Hook*> DetectRenderer(std::chrono::milliseconds timeout = std::chrono::milliseconds{ -1 });
 void StopRendererDetection();
-void FreeRendererDetection();
+void FreeDetector();
+
 }

overlay_experimental/Renderer_Hook.h

@@ -39,7 +39,8 @@ class Renderer_Hook
 public:
     Renderer_Hook():
         OverlayProc(&DefaultOverlayProc),
-        OverlayHookReady(&DefaultOverlayHookReady)
+        OverlayHookReady(&DefaultOverlayHookReady),
+        ImGuiFontAtlas(nullptr)
     {}
 
     static void DefaultOverlayProc() {}
@@ -47,6 +48,7 @@ public:
     std::function<void()> OverlayProc;
     std::function<void(bool)> OverlayHookReady;
 
+    void *ImGuiFontAtlas;
     virtual bool StartHook(std::function<bool(bool)> key_combination_callback, std::set<ToggleKey> toggle_keys) = 0;
     virtual bool IsStarted() = 0;
     // Returns a Handle to the renderer image ressource or nullptr if it failed to create the resource, the handle can be used in ImGui's Image calls, image_buffer must be RGBA ordered

overlay_experimental/linux/OpenGLX_Hook.cpp

@@ -84,7 +84,7 @@ void OpenGLX_Hook::_PrepareForOverlay(Display* display, GLXDrawable drawable)
 {
     if( !_Initialized )
     {
-        ImGui::CreateContext();
+        ImGui::CreateContext((ImFontAtlas *)ImGuiFontAtlas);
         ImGui_ImplOpenGL3_Init();
 
         //int attributes[] = { //can't be const b/c X11 doesn't like it.  Not sure if that's intentional or just stupid.

overlay_experimental/steam_overlay.cpp

@@ -128,7 +128,8 @@ Steam_Overlay::Steam_Overlay(Settings* settings, SteamCallResults* callback_resu
     i_have_lobby(false),
     show_achievements(false),
     show_settings(false),
-    _renderer(nullptr)
+    _renderer(nullptr),
+    fonts_atlas(nullptr)
 {
     strncpy(username_text, settings->get_local_name(), sizeof(username_text));
 
@@ -207,7 +208,7 @@ void Steam_Overlay::UnSetupOverlay()
     if (!Ready() && future_renderer.valid()) {
         if (future_renderer.wait_for(std::chrono::milliseconds{500}) ==  std::future_status::ready) {
             future_renderer.get();
-            ingame_overlay::FreeRendererDetection();
+            ingame_overlay::FreeDetector();
         }
     }
 }
@@ -709,11 +710,10 @@ void Steam_Overlay::BuildNotifications(int width, int height)
 
 void Steam_Overlay::CreateFonts()
 {
-    //TODO: remove from dx_whatever hook
-    if(ImGui::GetCurrentContext() == nullptr)
-        ImGui::CreateContext();
+    if (fonts_atlas) return;
+
+    ImFontAtlas *Fonts = new ImFontAtlas();
 
-    ImGuiIO& io = ImGui::GetIO();
     ImFontConfig fontcfg;
 
     float font_size = 16.0;
@@ -727,7 +727,7 @@ void Steam_Overlay::CreateFonts()
         font_builder.AddText(x.description.c_str());
     }
 
-    font_builder.AddRanges(io.Fonts->GetGlyphRangesDefault());
+    font_builder.AddRanges(Fonts->GetGlyphRangesDefault());
 
     ImVector<ImWchar> ranges;
     font_builder.BuildRanges(&ranges);
@@ -744,11 +744,11 @@ void Steam_Overlay::CreateFonts()
     ImFont *font = NULL;
 
 #if defined(__WINDOWS__)
-    font = io.Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\micross.ttf", font_size, &fontcfg);
+    font = Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\micross.ttf", font_size, &fontcfg);
 #endif
 
     if (!font) {
-        font = io.Fonts->AddFontDefault(&fontcfg);
+        font = Fonts->AddFontDefault(&fontcfg);
     }
 
     font_notif = font_default = font;
@@ -757,15 +757,16 @@ void Steam_Overlay::CreateFonts()
         PRINT_DEBUG("loading extra fonts\n");
         fontcfg.MergeMode = true;
 #if defined(__WINDOWS__)
-        io.Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\simsun.ttc", font_size, &fontcfg);
-        io.Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\malgun.ttf", font_size, &fontcfg);
+        Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\simsun.ttc", font_size, &fontcfg);
+        Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\malgun.ttf", font_size, &fontcfg);
 #endif
     }
 
-    io.Fonts->Build();
+    Fonts->Build();
+    fonts_atlas = (void *)Fonts;
 
-    ImGuiStyle& style = ImGui::GetStyle();
-    style.WindowRounding = 0.0; // Disable round window
+    // ImGuiStyle& style = ImGui::GetStyle();
+    // style.WindowRounding = 0.0; // Disable round window
     reset_LastError();
 }
 
@@ -1048,6 +1049,7 @@ void Steam_Overlay::RunCallbacks()
             auto callback = std::bind(&Steam_Overlay::OpenOverlayHook, this, std::placeholders::_1);
             PRINT_DEBUG("start renderer\n", _renderer);
             std::set<ingame_overlay::ToggleKey> keys = {ingame_overlay::ToggleKey::SHIFT, ingame_overlay::ToggleKey::TAB};
+            _renderer->ImGuiFontAtlas = fonts_atlas;
             bool started = _renderer->StartHook(callback, keys);
             PRINT_DEBUG("tried to start renderer %u\n", started);
     }

overlay_experimental/steam_overlay.h

@@ -102,6 +102,7 @@ class Steam_Overlay
     std::string show_url;
     std::vector<Overlay_Achievement> achievements;
     bool show_achievements, show_settings;
+    void *fonts_atlas;
 
     bool disable_forced, local_save, warning_forced;
     uint32_t appid;

overlay_experimental/windows/DX10_Hook.cpp

@@ -115,7 +115,7 @@ void DX10_Hook::_PrepareForOverlay(IDXGISwapChain* pSwapChain)
         pDevice->CreateRenderTargetView(pBackBuffer, nullptr, &mainRenderTargetView);
         pBackBuffer->Release();
 
-        ImGui::CreateContext();
+        ImGui::CreateContext((ImFontAtlas *)ImGuiFontAtlas);
         ImGui_ImplDX10_Init(pDevice);
 
         Windows_Hook::Inst()->SetInitialWindowSize(desc.OutputWindow);

overlay_experimental/windows/DX11_Hook.cpp

@@ -147,7 +147,7 @@ void DX11_Hook::_PrepareForOverlay(IDXGISwapChain* pSwapChain)
             return;
         
         if(ImGui::GetCurrentContext() == nullptr)
-            ImGui::CreateContext();
+            ImGui::CreateContext((ImFontAtlas *)ImGuiFontAtlas);
         
         ImGui_ImplDX11_Init(pDevice, pContext);
         

overlay_experimental/windows/DX12_Hook.cpp

@@ -264,7 +264,7 @@ void DX12_Hook::_PrepareForOverlay(IDXGISwapChain* pSwapChain, ID3D12CommandQueu
 
         //auto heaps = std::move(get_free_texture_heap());
 
-        ImGui::CreateContext();
+        ImGui::CreateContext((ImFontAtlas *)ImGuiFontAtlas);
         ImGui_ImplDX12_Init(pDevice, bufferCount, DXGI_FORMAT_R8G8B8A8_UNORM, pSrvDescHeap,
             pSrvDescHeap->GetCPUDescriptorHandleForHeapStart(),
             pSrvDescHeap->GetGPUDescriptorHandleForHeapStart());

overlay_experimental/windows/DX9_Hook.cpp

@@ -133,7 +133,7 @@ void DX9_Hook::_PrepareForOverlay(IDirect3DDevice9 *pDevice, HWND destWindow)
         pDevice->AddRef();
         _pDevice = pDevice;
 
-        ImGui::CreateContext();
+        ImGui::CreateContext((ImFontAtlas *)ImGuiFontAtlas);
         ImGui_ImplDX9_Init(pDevice);
 
         _LastWindow = destWindow;

overlay_experimental/windows/OpenGL_Hook.cpp

@@ -86,7 +86,7 @@ void OpenGL_Hook::_PrepareForOverlay(HDC hDC)
 
     if (!_Initialized)
     {
-        ImGui::CreateContext();
+        ImGui::CreateContext((ImFontAtlas *)ImGuiFontAtlas);
         ImGui_ImplOpenGL3_Init();
 
         _LastWindow = hWnd;