restructure project for dynamic linking

modules/gui/layers/baseLayer.cpp

@@ -0,0 +1,92 @@
+#include "baseLayer.h"
+#include "application.h"
+
+BaseLayer::BaseLayer()
+{
+}
+
+BaseLayer::~BaseLayer()
+{
+}
+
+void BaseLayer::onAttach()
+{
+}
+
+void BaseLayer::onDetach()
+{
+}
+
+void BaseLayer::onUpdate()
+{
+}
+
+bool BaseLayer::onEvent(const Event* e)
+{
+    EventHandler eh;
+    return eh.handleEvent(e, this);
+}
+
+bool BaseLayer::onMouseButtonPressed(const MouseButtonEvent *e)
+{
+    return true;
+}
+
+bool BaseLayer::onMouseButtonReleased(const MouseButtonEvent *e)
+{
+    App::Get().show = !App::Get().show;
+    return true;
+}
+
+bool BaseLayer::onMouseMoved(const MouseMovedEvent *e)
+{
+    return true;
+}
+
+bool BaseLayer::onMouseScrolled(const MouseScrolledEvent *e)
+{
+    return true;
+}
+
+bool BaseLayer::onKeyPressed(const KeyEvent *e)
+{
+    return true;
+}
+
+bool BaseLayer::onKeyReleased(const KeyEvent *e)
+{
+    return true;
+}
+
+bool BaseLayer::onKeyTyped(const KeyTypedEvent *)
+{
+    return true;
+}
+
+bool BaseLayer::onWindowClose(const WindowEvent *e)
+{
+    if (e->getWindowID() == SDL_GetWindowID(App::Get().getWindow())) {
+        App::Get().done = true;
+    }
+    return true;
+}
+
+bool BaseLayer::onWindowFocus(const WindowEvent *e)
+{
+    return true;
+}
+
+bool BaseLayer::onWindowFocusLost(const WindowEvent *e)
+{
+    return true;
+}
+
+bool BaseLayer::onWindowMoved(const WindowEvent *e)
+{
+    return true;
+}
+
+bool BaseLayer::onWindowResize(const WindowEvent *e)
+{
+    return true;
+}

modules/gui/layers/baseLayer.h

@@ -0,0 +1,32 @@
+#pragma once
+#include "engine.h"
+#include "layer.h"
+#include "eventHandler.h"
+
+class BaseLayer : public Layer {
+
+    public:
+
+        BaseLayer();
+        ~BaseLayer();
+
+        virtual void onAttach();
+        virtual void onDetach();
+        virtual void onUpdate();
+        virtual bool onEvent(const Event*);
+
+    protected:
+        virtual bool onMouseButtonPressed(const MouseButtonEvent*);
+        virtual bool onMouseButtonReleased(const MouseButtonEvent*);
+        virtual bool onMouseMoved(const MouseMovedEvent*);
+        virtual bool onMouseScrolled(const MouseScrolledEvent*);
+        virtual bool onKeyPressed(const KeyEvent*);
+        virtual bool onKeyReleased(const KeyEvent*);
+        virtual bool onKeyTyped(const KeyTypedEvent*);
+
+        virtual bool onWindowClose(const WindowEvent*);
+        virtual bool onWindowFocus(const WindowEvent*);
+        virtual bool onWindowFocusLost(const WindowEvent*);
+        virtual bool onWindowMoved(const WindowEvent*);
+        virtual bool onWindowResize(const WindowEvent*);
+};

modules/gui/layers/layer.cpp

@@ -0,0 +1,8 @@
+#include "layer.h"
+
+#include "application.h"
+
+
+Layer::Layer() {}
+
+Layer::~Layer() {}

modules/gui/layers/layer.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include "engine.h"
+
+#include "event.h"
+
+class Layer {
+
+    friend class EventHandler;
+
+    public:
+
+        Layer();
+        virtual ~Layer();
+
+        virtual void onAttach() = 0;
+        virtual void onDetach() = 0;
+        virtual void onUpdate() = 0;
+        virtual bool onEvent(const Event* event) = 0;
+
+    protected:
+        virtual bool onMouseButtonPressed(const MouseButtonEvent* event) = 0;
+        virtual bool onMouseButtonReleased(const MouseButtonEvent* event) = 0;
+        virtual bool onMouseMoved(const MouseMovedEvent* event) = 0;
+        virtual bool onMouseScrolled(const MouseScrolledEvent* event) = 0;
+        virtual bool onKeyPressed(const KeyEvent* event) = 0;
+        virtual bool onKeyReleased(const KeyEvent* event) = 0;
+        virtual bool onKeyTyped(const KeyTypedEvent* event) = 0;
+        virtual bool onWindowResize(const WindowEvent* event) = 0;
+        virtual bool onWindowFocus(const WindowEvent* event) = 0;
+        virtual bool onWindowFocusLost(const WindowEvent* event) = 0;
+        virtual bool onWindowClose(const WindowEvent* event) = 0;
+        virtual bool onWindowMoved(const WindowEvent* event) = 0;
+
+};

modules/gui/layers/layerstack.cpp

@@ -0,0 +1,77 @@
+#include "layerstack.h"
+#include "application.h"
+
+
+LayerStack::LayerStack() {
+
+    insert = layers.begin();
+}
+
+LayerStack::~LayerStack() {
+
+    for(Layer* layer : layers) {
+        delete layer;
+    }
+}
+
+void LayerStack::pushLayer(Layer* layer) {
+    layers.emplace(insert, layer);
+    layer->onAttach();
+}
+
+void LayerStack::pushOverlay(Layer* layer) {
+    layers.emplace_back(layer);
+    layer->onAttach();
+}
+
+void LayerStack::popLayer(Layer* layer) {
+    auto it = find(layers.begin(), layers.end(), layer);
+    if(it != layers.end()) {
+        layers.erase(it);
+        insert--;
+    }
+    layer->onDetach();
+}
+
+void LayerStack::popOverlay(Layer* layer) {
+    auto it = find(layers.begin(), layers.end(), layer);
+    if(it != layers.end()) {
+        layers.erase(it);
+    }
+    layer->onDetach();
+}
+
+void LayerStack::propagateEvent(const Event* e) {
+    eventHandled = false;
+    if(e == nullptr)
+        return;
+    else {
+        if(layers.size() > 0) {
+            for(int i = layers.size() - 1; i >= 0; i--) {
+                if(!eventHandled)
+                    eventHandled = layers.at(i)->onEvent(e);
+                else
+                    break;
+            }
+        }
+        delete e;
+    }
+}
+
+void LayerStack::updateLayers() {
+    if(layers.size() > 0) {
+        for(Layer* layer : layers) {
+            layer->onUpdate();
+        }
+    }
+}
+
+void LayerStack::shutdown() {
+    if(layers.size() > 0) {
+        for(Layer* layer : layers) {
+            popLayer(layer);
+            layer->onDetach();
+            delete layer;
+        }
+    }   
+}

modules/gui/layers/layerstack.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include "engine.h"
+
+#include "layer.h"
+
+
+class LayerStack {
+
+    public:
+        LayerStack();
+        ~LayerStack();
+
+        void pushLayer(Layer*);
+        void pushOverlay(Layer*);
+        void popLayer(Layer*);
+        void popOverlay(Layer*);
+
+        void propagateEvent(const Event*);
+        void updateLayers();
+        void shutdown();
+
+        inline Layer* getLayer(unsigned long i) { return layers.at(i); }
+
+        std::vector<Layer*>::iterator begin() {return layers.begin();}
+        std::vector<Layer*>::iterator end() {return layers.end();}
+
+    private:
+        std::vector<Layer*> layers;
+        std::vector<Layer*>::iterator insert;
+        bool eventHandled;
+};

modules/gui/layers/overlay.cpp

@@ -0,0 +1,271 @@
+#include "overlay.h"
+#include "application.h"
+
+static void check_vk_result(VkResult err)
+{
+    if (err == 0)
+        return;
+    fprintf(stderr, "[vulkan] Error: VkResult = %d\n", err);
+    if (err < 0)
+        abort();
+}
+
+Overlay::Overlay() {
+
+}
+
+Overlay::~Overlay() {
+    
+
+}
+
+void Overlay::onAttach() {
+
+    init();
+}
+
+void Overlay::onDetach() {
+
+
+}
+
+void Overlay::onUpdate() {
+
+    newFrame();
+
+    define(nullptr, [](Overlay& overlay, void** data) {
+
+        if(App::Get().show)
+            ImGui::ShowDemoWindow();
+
+        {
+            static char filename[24] = "test.py";
+            static std::vector<char> text(2048);
+            static std::fstream file;
+
+            
+
+            ImGui::Begin("Main Editor");
+
+            ImGui::InputText("File Name", filename, 24);
+
+            ImGui::SameLine();
+
+            if(ImGui::Button("load", ImVec2(48, 16))) {
+                file.open(filename, std::ios::in);
+                if(file.is_open()) {
+                    for(int i = 0; i < text.size(); i++) {
+                        if(!file.eof())
+                            text.at(i) = file.get();    
+                        else
+                            text.at(i) = '\r';
+                    }
+                    file.close();
+                } else {
+                    std::cout << "file does not exist!\n";
+                }
+            }
+
+            ImGui::InputTextMultiline("Editor", text.data(), text.size(), 
+                                        ImVec2(-FLT_MIN, ImGui::GetTextLineHeight() * 16), 
+                                        ImGuiInputTextFlags_AllowTabInput);
+
+            if(ImGui::Button("save", ImVec2(48, 16))) {
+                file.open(filename, std::ios::out | std::ios::trunc);
+                if(file.is_open()){
+                    for(char c : text)
+                        file.put(c == '\0' ? ' ' : c);
+                    file.close();
+                } else {
+                    std::cout << "file could not be opened!\n";
+                }
+            }
+
+            ImGui::SameLine();
+
+            if(ImGui::Button("run", ImVec2(48, 16))) {
+                if (system(("python " + std::string(filename)).c_str()))
+                    std::cout << "command failed!\n";
+            }
+            ImGui::End();
+        }
+
+        return 0;
+    });
+
+    render();
+}
+
+bool Overlay::onEvent(const Event* event) {
+
+    EventHandler eh;
+    return eh.handleEvent(event, this);
+}
+
+bool Overlay::onMouseButtonPressed(const MouseButtonEvent* event) {
+
+    ImGuiIO& io = ImGui::GetIO();
+    if(io.WantCaptureMouse)
+        io.AddMouseButtonEvent(event->getButton(), event->getPressed());
+    return io.WantCaptureMouse;
+}
+
+bool Overlay::onMouseButtonReleased(const MouseButtonEvent* event) {
+
+    ImGuiIO& io = ImGui::GetIO();
+    if(io.WantCaptureMouse)
+        io.AddMouseButtonEvent(event->getButton(), event->getPressed());
+    return io.WantCaptureMouse;
+}
+
+bool Overlay::onMouseMoved(const MouseMovedEvent* event) {
+
+    ImGuiIO& io = ImGui::GetIO();
+    if(io.WantCaptureMouse)
+        io.AddMousePosEvent(event->getX(), event->getY());
+    return io.WantCaptureMouse;
+}
+
+bool Overlay::onMouseScrolled(const MouseScrolledEvent* event) {
+
+    ImGuiIO& io = ImGui::GetIO();
+    if(io.WantCaptureMouse)
+        io.AddMouseWheelEvent(event->getX(), event->getY());
+    return io.WantCaptureMouse;
+}
+
+bool Overlay::onKeyPressed(const KeyEvent* event) {
+
+    ImGuiIO& io = ImGui::GetIO();
+    if(io.WantCaptureKeyboard) {
+        ImGui_ImplSDL2_UpdateKeyModifiers((SDL_Keymod)event->getMod());
+        io.AddKeyEvent(ImGui_ImplSDL2_KeyEventToImGuiKey(event->getKey(), (SDL_Scancode)event->getScancode()), 
+                        event->getPressed());
+    }
+    return io.WantCaptureKeyboard;
+}
+
+bool Overlay::onKeyReleased(const KeyEvent* event) {
+
+    ImGuiIO& io = ImGui::GetIO();
+    if(io.WantCaptureKeyboard) {
+        ImGui_ImplSDL2_UpdateKeyModifiers((SDL_Keymod)event->getMod());
+        io.AddKeyEvent(ImGui_ImplSDL2_KeyEventToImGuiKey(event->getKey(), (SDL_Scancode)event->getScancode()), 
+                        event->getPressed());
+    }
+    return io.WantCaptureKeyboard;
+}
+
+bool Overlay::onKeyTyped(const KeyTypedEvent *e)
+{
+    ImGuiIO& io = ImGui::GetIO();
+    if(io.WantCaptureKeyboard)
+        io.AddInputCharactersUTF8(e->getText());
+    return io.WantCaptureKeyboard;
+}
+
+bool Overlay::onWindowClose(const WindowEvent *e)
+{
+    return false;
+}
+
+bool Overlay::onWindowFocus(const WindowEvent *e)
+{
+    return false;
+}
+
+bool Overlay::onWindowFocusLost(const WindowEvent *e)
+{
+    return false;
+}
+
+bool Overlay::onWindowMoved(const WindowEvent *e)
+{
+    return false;
+}
+
+bool Overlay::onWindowResize(const WindowEvent *e)
+{
+    Window& window = App::Get().getWindow();
+    window.getSize();
+    ImGui::GetIO().DisplaySize = ImVec2(window.x, window.y);
+    return false;
+}
+
+void Overlay::init() {
+
+    App& app = App::Get();
+    Renderer& renderer = app.getRenderer();
+
+    IMGUI_CHECKVERSION();
+    ImGui::CreateContext();
+    ImGuiIO& io = ImGui::GetIO(); (void)io;
+    io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
+    io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
+    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;         // Enable Docking
+    io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;       // Enable Multi-Viewport / Platform Windows
+
+    ImGui::StyleColorsDark();
+
+    ImGuiStyle& style = ImGui::GetStyle();
+
+    if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+    {
+        style.WindowRounding = 0.0f;
+        style.Colors[ImGuiCol_WindowBg].w = 1.0f;
+    }
+
+    ImGui_ImplSDL2_InitForVulkan(app.getWindow());
+    
+    ImGui_ImplVulkan_InitInfo init_info = {};
+    init_info.Instance = renderer.getInstance();
+    init_info.Queue = renderer.getPresentQueue();
+    init_info.DescriptorPool = renderer.getDescriptorPool();
+    init_info.RenderPass = renderer.getRenderPass();
+    init_info.Device = renderer.getDevice();
+    init_info.PhysicalDevice = renderer.getPhysicalDevice();
+    // init_info.MSAASamples = renderer.getMSAASamples();
+    init_info.MinImageCount = renderer.getNumImages();
+    init_info.ImageCount = renderer.getNumImages();
+    ImGui_ImplVulkan_Init(&init_info);
+
+    ImGui_ImplVulkan_CreateFontsTexture();
+}
+
+void Overlay::shutdown() {
+    ImGui_ImplVulkan_Shutdown();
+    ImGui_ImplSDL2_Shutdown();
+    ImGui::DestroyContext();
+}
+
+void Overlay::newFrame() {
+
+    ImGui_ImplVulkan_NewFrame();
+    ImGui_ImplSDL2_NewFrame();
+    ImGui::NewFrame();
+}
+
+void Overlay::renderPlatformWindows() {
+
+    if (ImGui::GetIO().ConfigFlags & ImGuiConfigFlags_ViewportsEnable) {
+        ImGui::UpdatePlatformWindows();
+        ImGui::RenderPlatformWindowsDefault();
+    }
+}
+
+
+
+void Overlay::render() {
+
+    Renderer& renderer = App::Get().getRenderer();
+
+    ImGui::Render();
+    main_draw_data = ImGui::GetDrawData();
+    mainMinimized = (main_draw_data->DisplaySize.x <= 0.0f || main_draw_data->DisplaySize.y <= 0.0f);
+    ImGui_ImplVulkan_RenderDrawData(main_draw_data, renderer.getCommandBuffer(renderer.getFrame()));
+    renderPlatformWindows();
+}
+
+bool Overlay::isMinimized() {
+    return mainMinimized;
+}

modules/gui/layers/overlay.h

@@ -0,0 +1,209 @@
+#pragma once
+
+#include "engine.h"
+
+#include "layer.h"
+
+#include "sdl2Window.h"
+
+#include "vulkanRenderer.h"
+
+
+
+
+class Overlay : public Layer {
+
+    public:
+
+        Overlay();
+
+        ~Overlay();
+
+        virtual void onAttach();
+
+        virtual void onDetach();
+
+        virtual void onUpdate();
+
+        virtual bool onEvent(const Event*);
+
+        protected:
+
+        virtual bool onMouseButtonPressed(const MouseButtonEvent*);
+        virtual bool onMouseButtonReleased(const MouseButtonEvent*);
+        virtual bool onMouseMoved(const MouseMovedEvent*);
+        virtual bool onMouseScrolled(const MouseScrolledEvent*);
+        virtual bool onKeyPressed(const KeyEvent*);
+        virtual bool onKeyReleased(const KeyEvent*);
+        virtual bool onKeyTyped(const KeyTypedEvent*);
+
+        virtual bool onWindowClose(const WindowEvent*);
+        virtual bool onWindowFocus(const WindowEvent*);
+        virtual bool onWindowFocusLost(const WindowEvent*);
+        virtual bool onWindowMoved(const WindowEvent*);
+        virtual bool onWindowResize(const WindowEvent*);
+
+        public:
+
+        void init();
+
+        void shutdown();
+
+        void newFrame();
+
+        void renderPlatformWindows();
+
+        //template<typename T>
+        inline int define(void** data, int(*func)(Overlay&, void**)) 
+        { return func(*this, data); }
+
+        void render();
+
+        bool isMinimized();
+
+    //private:
+
+        ImDrawData* main_draw_data = nullptr;
+        bool mainMinimized;
+        
+
+};
+
+/////////////////////////////////////////////
+static ImGuiKey ImGui_ImplSDL2_KeyEventToImGuiKey(SDL_Keycode keycode, SDL_Scancode scancode)
+{
+    IM_UNUSED(scancode);
+    switch (keycode)
+    {
+        case SDLK_TAB: return ImGuiKey_Tab;
+        case SDLK_LEFT: return ImGuiKey_LeftArrow;
+        case SDLK_RIGHT: return ImGuiKey_RightArrow;
+        case SDLK_UP: return ImGuiKey_UpArrow;
+        case SDLK_DOWN: return ImGuiKey_DownArrow;
+        case SDLK_PAGEUP: return ImGuiKey_PageUp;
+        case SDLK_PAGEDOWN: return ImGuiKey_PageDown;
+        case SDLK_HOME: return ImGuiKey_Home;
+        case SDLK_END: return ImGuiKey_End;
+        case SDLK_INSERT: return ImGuiKey_Insert;
+        case SDLK_DELETE: return ImGuiKey_Delete;
+        case SDLK_BACKSPACE: return ImGuiKey_Backspace;
+        case SDLK_SPACE: return ImGuiKey_Space;
+        case SDLK_RETURN: return ImGuiKey_Enter;
+        case SDLK_ESCAPE: return ImGuiKey_Escape;
+        case SDLK_QUOTE: return ImGuiKey_Apostrophe;
+        case SDLK_COMMA: return ImGuiKey_Comma;
+        case SDLK_MINUS: return ImGuiKey_Minus;
+        case SDLK_PERIOD: return ImGuiKey_Period;
+        case SDLK_SLASH: return ImGuiKey_Slash;
+        case SDLK_SEMICOLON: return ImGuiKey_Semicolon;
+        case SDLK_EQUALS: return ImGuiKey_Equal;
+        case SDLK_LEFTBRACKET: return ImGuiKey_LeftBracket;
+        case SDLK_BACKSLASH: return ImGuiKey_Backslash;
+        case SDLK_RIGHTBRACKET: return ImGuiKey_RightBracket;
+        case SDLK_BACKQUOTE: return ImGuiKey_GraveAccent;
+        case SDLK_CAPSLOCK: return ImGuiKey_CapsLock;
+        case SDLK_SCROLLLOCK: return ImGuiKey_ScrollLock;
+        case SDLK_NUMLOCKCLEAR: return ImGuiKey_NumLock;
+        case SDLK_PRINTSCREEN: return ImGuiKey_PrintScreen;
+        case SDLK_PAUSE: return ImGuiKey_Pause;
+        case SDLK_KP_0: return ImGuiKey_Keypad0;
+        case SDLK_KP_1: return ImGuiKey_Keypad1;
+        case SDLK_KP_2: return ImGuiKey_Keypad2;
+        case SDLK_KP_3: return ImGuiKey_Keypad3;
+        case SDLK_KP_4: return ImGuiKey_Keypad4;
+        case SDLK_KP_5: return ImGuiKey_Keypad5;
+        case SDLK_KP_6: return ImGuiKey_Keypad6;
+        case SDLK_KP_7: return ImGuiKey_Keypad7;
+        case SDLK_KP_8: return ImGuiKey_Keypad8;
+        case SDLK_KP_9: return ImGuiKey_Keypad9;
+        case SDLK_KP_PERIOD: return ImGuiKey_KeypadDecimal;
+        case SDLK_KP_DIVIDE: return ImGuiKey_KeypadDivide;
+        case SDLK_KP_MULTIPLY: return ImGuiKey_KeypadMultiply;
+        case SDLK_KP_MINUS: return ImGuiKey_KeypadSubtract;
+        case SDLK_KP_PLUS: return ImGuiKey_KeypadAdd;
+        case SDLK_KP_ENTER: return ImGuiKey_KeypadEnter;
+        case SDLK_KP_EQUALS: return ImGuiKey_KeypadEqual;
+        case SDLK_LCTRL: return ImGuiKey_LeftCtrl;
+        case SDLK_LSHIFT: return ImGuiKey_LeftShift;
+        case SDLK_LALT: return ImGuiKey_LeftAlt;
+        case SDLK_LGUI: return ImGuiKey_LeftSuper;
+        case SDLK_RCTRL: return ImGuiKey_RightCtrl;
+        case SDLK_RSHIFT: return ImGuiKey_RightShift;
+        case SDLK_RALT: return ImGuiKey_RightAlt;
+        case SDLK_RGUI: return ImGuiKey_RightSuper;
+        case SDLK_APPLICATION: return ImGuiKey_Menu;
+        case SDLK_0: return ImGuiKey_0;
+        case SDLK_1: return ImGuiKey_1;
+        case SDLK_2: return ImGuiKey_2;
+        case SDLK_3: return ImGuiKey_3;
+        case SDLK_4: return ImGuiKey_4;
+        case SDLK_5: return ImGuiKey_5;
+        case SDLK_6: return ImGuiKey_6;
+        case SDLK_7: return ImGuiKey_7;
+        case SDLK_8: return ImGuiKey_8;
+        case SDLK_9: return ImGuiKey_9;
+        case SDLK_a: return ImGuiKey_A;
+        case SDLK_b: return ImGuiKey_B;
+        case SDLK_c: return ImGuiKey_C;
+        case SDLK_d: return ImGuiKey_D;
+        case SDLK_e: return ImGuiKey_E;
+        case SDLK_f: return ImGuiKey_F;
+        case SDLK_g: return ImGuiKey_G;
+        case SDLK_h: return ImGuiKey_H;
+        case SDLK_i: return ImGuiKey_I;
+        case SDLK_j: return ImGuiKey_J;
+        case SDLK_k: return ImGuiKey_K;
+        case SDLK_l: return ImGuiKey_L;
+        case SDLK_m: return ImGuiKey_M;
+        case SDLK_n: return ImGuiKey_N;
+        case SDLK_o: return ImGuiKey_O;
+        case SDLK_p: return ImGuiKey_P;
+        case SDLK_q: return ImGuiKey_Q;
+        case SDLK_r: return ImGuiKey_R;
+        case SDLK_s: return ImGuiKey_S;
+        case SDLK_t: return ImGuiKey_T;
+        case SDLK_u: return ImGuiKey_U;
+        case SDLK_v: return ImGuiKey_V;
+        case SDLK_w: return ImGuiKey_W;
+        case SDLK_x: return ImGuiKey_X;
+        case SDLK_y: return ImGuiKey_Y;
+        case SDLK_z: return ImGuiKey_Z;
+        case SDLK_F1: return ImGuiKey_F1;
+        case SDLK_F2: return ImGuiKey_F2;
+        case SDLK_F3: return ImGuiKey_F3;
+        case SDLK_F4: return ImGuiKey_F4;
+        case SDLK_F5: return ImGuiKey_F5;
+        case SDLK_F6: return ImGuiKey_F6;
+        case SDLK_F7: return ImGuiKey_F7;
+        case SDLK_F8: return ImGuiKey_F8;
+        case SDLK_F9: return ImGuiKey_F9;
+        case SDLK_F10: return ImGuiKey_F10;
+        case SDLK_F11: return ImGuiKey_F11;
+        case SDLK_F12: return ImGuiKey_F12;
+        case SDLK_F13: return ImGuiKey_F13;
+        case SDLK_F14: return ImGuiKey_F14;
+        case SDLK_F15: return ImGuiKey_F15;
+        case SDLK_F16: return ImGuiKey_F16;
+        case SDLK_F17: return ImGuiKey_F17;
+        case SDLK_F18: return ImGuiKey_F18;
+        case SDLK_F19: return ImGuiKey_F19;
+        case SDLK_F20: return ImGuiKey_F20;
+        case SDLK_F21: return ImGuiKey_F21;
+        case SDLK_F22: return ImGuiKey_F22;
+        case SDLK_F23: return ImGuiKey_F23;
+        case SDLK_F24: return ImGuiKey_F24;
+        case SDLK_AC_BACK: return ImGuiKey_AppBack;
+        case SDLK_AC_FORWARD: return ImGuiKey_AppForward;
+        default: break;
+    }
+    return ImGuiKey_None;
+}
+
+static void ImGui_ImplSDL2_UpdateKeyModifiers(SDL_Keymod sdl_key_mods)
+{
+    ImGuiIO& io = ImGui::GetIO();
+    io.AddKeyEvent(ImGuiMod_Ctrl, (sdl_key_mods & KMOD_CTRL) != 0);
+    io.AddKeyEvent(ImGuiMod_Shift, (sdl_key_mods & KMOD_SHIFT) != 0);
+    io.AddKeyEvent(ImGuiMod_Alt, (sdl_key_mods & KMOD_ALT) != 0);
+    io.AddKeyEvent(ImGuiMod_Super, (sdl_key_mods & KMOD_GUI) != 0);
+}