add: config ui

.gitignore

@@ -34,3 +34,5 @@
 
 build/*
 .vscode/*
+frame/src/Config.h
+.editorconfig

CMakeLists.txt

@@ -15,6 +15,7 @@ option(BUILD_EPD
 )
 
 find_package(fmt CONFIG REQUIRED)
+find_package(nlohmann_json CONFIG REQUIRED)
 
 option(BUILD_VIRTUAL_DISPLAY
     "Build virtual sfml based display"
@@ -28,6 +29,7 @@ endif (BUILD_EPD)
 
 if (BUILD_VIRTUAL_DISPLAY)
     find_package(SFML COMPONENTS system window graphics CONFIG REQUIRED)
+    add_subdirectory(fontConverter)
 endif(BUILD_VIRTUAL_DISPLAY)
 
 add_subdirectory(frame)

fontConverter/CMakeLists.txt

@@ -0,0 +1,10 @@
+
+
+add_executable(font src/main.cpp)
+target_link_libraries(font PUBLIC 
+    sfml-system 
+    sfml-window 
+    sfml-graphics 
+    fmt::fmt
+    nlohmann_json::nlohmann_json
+)

fontConverter/src/main.cpp

@@ -0,0 +1,102 @@
+#include <fmt/format.h>
+#include <fstream>
+#include <nlohmann/json.hpp>
+#include <sfml/Graphics.hpp>
+
+using json = nlohmann::json;
+
+void PrintGlyph(sf::Font const& font, sf::Glyph const& g, unsigned int size);
+
+void ExportSize(json& out, uint32_t size, sf::Font& font);
+
+int main()
+{
+    sf::Font font;
+
+    auto ok =
+        font.loadFromFile(R"(C:\Users\s-har\Downloads\FiraCode-Regular.ttf)");
+
+    fmt::print("Loaded {}\n", ok);
+
+    fmt::print("{}\n", font.getInfo().family);
+    fmt::print("Line Spacing: {}\n", font.getLineSpacing(14));
+
+    json export_font;
+    export_font["name"]  = font.getInfo().family;
+    export_font["sizes"] = json::object();
+
+    std::vector<uint32_t> sizes =
+        {12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 35, 40, 100, 250};
+
+    for(auto& size : sizes)
+    {
+        fmt::print("Export: {}\n", size);
+        ExportSize(export_font["sizes"][fmt::format("{}", size)], size, font);
+    }
+
+    std::fstream out(fmt::format("{}.json", font.getInfo().family),
+                     std::ios::out);
+    out << export_font.dump();
+}
+
+void ExportSize(json& out, uint32_t size, sf::Font& font)
+{
+    std::map<char, sf::Glyph> glyphs;
+
+    for(uint8_t c = 32; c <= 126; ++c)
+    {
+        glyphs[(char)c] = font.getGlyph(c, size, false);
+    }
+    auto font_image = font.getTexture(size).copyToImage();
+
+    out["LineSpacing"] = font.getLineSpacing(size);
+    auto& Glyphs       = out["Glyphs"];
+
+    for(auto&& [c, g] : glyphs)
+    {
+        auto& current = Glyphs[std::string{c}];
+
+        current["advance"]  = g.advance;
+        current["x_offset"] = g.bounds.left;
+        current["y_offset"] = g.bounds.top;
+        current["width"]    = g.bounds.width;
+        current["height"]   = g.bounds.height;
+
+        std::vector<uint8_t> data;
+
+        for(int y = 0; y < (int)g.bounds.height; ++y)
+        {
+            for(int x = 0; x < (int)g.bounds.width; ++x)
+            {
+                auto c = font_image.getPixel(g.textureRect.left + x,
+                                             g.textureRect.top + y);
+
+                data.push_back(c.a > 100 ? 1 : 0);
+            }
+        }
+
+        current["data"] = data;
+    }
+}
+
+void PrintGlyph(sf::Font const& font, sf::Glyph const& g, unsigned int size)
+{
+    auto font_image = font.getTexture(size).copyToImage();
+    for(int y = 0; y < (int)g.bounds.height; ++y)
+    {
+        for(int x = 0; x < (int)g.bounds.width; ++x)
+        {
+            auto c = font_image.getPixel(g.textureRect.left + x,
+                                         g.textureRect.top + y);
+
+            if(c.a > 100)
+            {
+                fmt::print("X");
+            } else
+            {
+                fmt::print(" ");
+            }
+        }
+        fmt::print("\n");
+    }
+}

frame/CMakeLists.txt

@@ -2,19 +2,56 @@
 set(target frame)
 
 configure_file (
-  "${PROJECT_SOURCE_DIR}/frame/src/Config.h.in"
+  "${PROJECT_SOURCE_DIR}/frame/src/BuildConfig.h.in"
-  "${PROJECT_SOURCE_DIR}/frame/src/Config.h"
+  "${PROJECT_SOURCE_DIR}/frame/src/BuildConfig.h"
 )
 
 set(src 
     src/main.cpp
+    
+    src/Config.hpp
+    src/Config.cpp   
+
+    src/Size.hpp
+    src/Vector.hpp
+    src/Rect.hpp
+
     src/Image.hpp
     src/Image.cpp
+
+    src/ScreenManager.hpp
+    src/ScreenManager.cpp
+    
+    src/ServiceLocator.hpp
+    src/ServiceLocator.cpp
+
     src/display/IDisplay.hpp
     src/display/Display.hpp
     src/display/Display.cpp
+    
     src/render/RenderTarget.hpp
     src/render/RenderTarget.cpp
+    
+    src/font/Font.hpp
+    src/font/Font.cpp
+    src/font/Glyph.hpp
+    src/font/Glyph.cpp
+    src/font/FontRegistry.hpp
+    src/font/FontRegistry.cpp
+
+
+    src/widgets/Widget.hpp
+    src/widgets/Widget.cpp
+    src/widgets/ContainerWidget.hpp
+    src/widgets/ContainerWidget.cpp
+    src/widgets/WidgetRegistry.hpp
+    src/widgets/WidgetRegistry.cpp
+    src/widgets/clock/Digital.hpp
+    src/widgets/clock/Digital.cpp
+    src/widgets/clock/Analog.hpp
+    src/widgets/clock/Analog.cpp
+    src/widgets/clock/Date.hpp
+    src/widgets/clock/Date.cpp
 
 )
 
@@ -33,12 +70,23 @@ if (BUILD_VIRTUAL_DISPLAY)
 endif (BUILD_VIRTUAL_DISPLAY)
 
 add_executable(${target} ${src})
-target_link_libraries(${target} PRIVATE fmt::fmt)
+target_link_libraries(${target} PRIVATE 
+    fmt::fmt
+    nlohmann_json::nlohmann_json
+)
 
 if (BUILD_EPD)
-    target_link_libraries(${target} PRIVATE waveshare)
+    target_link_libraries(${target} PRIVATE 
+        waveshare
+    )
 endif (BUILD_EPD)
 
 if (BUILD_VIRTUAL_DISPLAY)
-    target_link_libraries(${target} PRIVATE sfml-system sfml-window sfml-graphics)
+    target_link_libraries(${target} PRIVATE 
+        sfml-system 
+        sfml-window 
+        sfml-graphics
+        fmt::fmt
+        nlohmann_json::nlohmann_json
+    )
 endif(BUILD_VIRTUAL_DISPLAY)

frame/src/Config.cpp

@@ -0,0 +1,89 @@
+#include "Config.hpp"
+
+#include <filesystem>
+#include <fmt/format.h>
+#include <fstream>
+
+namespace fs = std::filesystem;
+
+#define PROPERTY(str, member) str.member = j.value(#member, str.member)
+#define PROPERTY_OPT(str, member, type) \
+    str.member =                        \
+        j.contains(#member) ? j[#member].get<type>() : std::optional<type>{};
+
+#define OBJ(str, mem) \
+    {                 \
+#        mem, str.mem \
+    }
+
+Config Config::Load()
+{
+    fs::path const config_path{"config.json"};
+
+    if(fs::is_regular_file(config_path))
+    {
+        try
+        {
+            std::fstream file(config_path.string(), std::ios::in);
+
+            return json::parse(file);
+        }
+        catch(std::exception const& e)
+        {
+            fmt::print("Error: {}\n", e.what());
+
+            // TODO: Create Error Display Widget
+
+            return {};
+        }
+    }
+
+    fmt::print("[INFO] Creating config file\n");
+    Config config;
+    std::fstream file(config_path.string(), std::ios::out);
+    file << json(config).dump();
+
+    return config;
+}
+
+// == to json ==
+void to_json(json& j, Config const& c)
+{
+    j = {OBJ(c, font), OBJ(c, root)};
+}
+
+void to_json(json& j, FontConfig const& fc)
+{
+    j = {OBJ(fc, base_path), OBJ(fc, fonts)};
+}
+
+void to_json(json& j, WidgetConfig const& w)
+{
+    j = {OBJ(w, name), OBJ(w, parameters), OBJ(w, widgets)};
+
+    if(w.slot)
+    {
+        j["slot"] = w.slot.value();
+    }
+}
+
+// == from json ==
+void from_json(json const& j, Config& c)
+{
+    PROPERTY(c, font);
+    PROPERTY(c, root);
+}
+
+void from_json(json const& j, FontConfig& fc)
+{
+    PROPERTY(fc, base_path);
+    PROPERTY(fc, fonts);
+}
+
+void from_json(json const& j, WidgetConfig& w)
+{
+    PROPERTY(w, name);
+    PROPERTY(w, parameters);
+    PROPERTY(w, widgets);
+    PROPERTY_OPT(w, slot, int);
+}

frame/src/Config.hpp

@@ -0,0 +1,38 @@
+#pragma once
+#include <nlohmann/json.hpp>
+#include <optional>
+#include <string>
+#include <unordered_map>
+
+using json = nlohmann::json;
+
+struct FontConfig
+{
+    std::string base_path = "fonts/";
+    std::unordered_map<std::string, std::string> fonts{
+        {"Fira Code", "FiraCode.json"}};
+};
+
+struct WidgetConfig
+{
+    std::string name                                 = "DigitalClock";
+    std::unordered_map<std::string, json> parameters = {};
+    std::vector<WidgetConfig> widgets                = {};
+    std::optional<int> slot                          = {};
+};
+
+struct Config
+{
+    FontConfig font{};
+    WidgetConfig root{};
+
+    static Config Load();
+};
+
+void to_json(json& j, Config const& c);
+void to_json(json& j, FontConfig const& fc);
+void to_json(json& j, WidgetConfig const& w);
+
+void from_json(json const& j, Config& c);
+void from_json(json const& j, FontConfig& fc);
+void from_json(json const& j, WidgetConfig& w);

frame/src/Image.cpp

@@ -1,7 +1,11 @@
 #include "Image.hpp"
 
+#include "Color.hpp"
+
+#include <cstring>
 #include <stdint.h>
 
+
 namespace frame
 {
 
@@ -17,6 +21,15 @@ namespace frame
     {
     }
 
+    void Image::Create(uint32_t pWidth, uint32_t pHeight)
+    {
+        mWidth  = pWidth;
+        mHeight = pHeight;
+
+        mBuffer.clear();
+        mBuffer.resize(mWidth * mHeight);
+    }
+
     uint8_t& Image::at(uint32_t x, uint32_t y)
     {
         return mBuffer.at(toInternal(x, y));
@@ -27,6 +40,18 @@ namespace frame
         return mBuffer.at(toInternal(x, y));
     }
 
+    void Image::Clear(Color color)
+    {
+        memset(mBuffer.data(), color, mBuffer.size());
+    }
+
+    void Image::operator=(Image const& image)
+    {
+        mHeight = image.mHeight;
+        mWidth  = image.mWidth;
+        mBuffer = image.mBuffer;
+    }
+
     size_t Image::toInternal(uint32_t x, uint32_t y) const
     {
         return x + mWidth * y;

frame/src/Image.hpp

@@ -1,9 +1,11 @@
 #pragma once
+#include "Color.hpp"
 #include "Size.hpp"
 
 #include <cstdint>
 #include <vector>
 
+
 namespace frame
 {
 
@@ -14,12 +16,19 @@ namespace frame
         std::vector<uint8_t> mBuffer;
 
     public:
+        Image() = default;
         Image(uint32_t pWidth, uint32_t pHeight);
         Image(Size size);
+        Image(Image const&) = default;
+        Image(Image&&)      = default;
+
+        void Create(uint32_t pWidth, uint32_t pHeight);
 
         uint8_t& at(uint32_t x, uint32_t y);
         uint8_t const& at(uint32_t x, uint32_t y) const;
 
+        void Clear(Color color);
+
         auto getWidth() const
         {
             return mWidth;
@@ -29,6 +38,8 @@ namespace frame
             return mHeight;
         }
 
+        void operator=(Image const& image);
+
     private:
         size_t toInternal(uint32_t x, uint32_t y) const;
     };

frame/src/Rect.hpp

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <cstdint>
+
+namespace frame
+{
+
+    struct Rect
+    {
+        int32_t top;
+        int32_t left;
+        int32_t width;
+        int32_t height;
+    };
+} // namespace frame

frame/src/ScreenManager.cpp

@@ -0,0 +1,64 @@
+#include "ScreenManager.hpp"
+
+#include <thread>
+
+namespace frame
+{
+
+    ScreenManager::ScreenManager(std::unique_ptr<display::IDisplay> pDisplay)
+        : mDisplay(std::move(pDisplay))
+        , mRenderTarget(mDisplay->getSize())
+    {
+    }
+
+    void ScreenManager::Update()
+    {
+        if(mRoot)
+        {
+            mRoot->Update();
+        }
+        if(mDisplay)
+        {
+            mDisplay->Update();
+            if(!mDisplay->isOpen())
+            {
+                mIsRunning = false;
+            }
+        }
+    }
+
+    void ScreenManager::Render()
+    {
+        if(mRoot)
+        {
+            mRenderTarget.Clear();
+
+            mRoot->setSize(mDisplay->getSize());
+            mRoot->Render(mRenderTarget);
+
+            mDisplay->Display(mRenderTarget.getImage());
+        }
+    }
+
+    void ScreenManager::MainLoop()
+    {
+        while(mIsRunning)
+        {
+            Update();
+
+            if(mRoot && mRoot->isDirty())
+            {
+                Render();
+            }
+
+            std::this_thread::sleep_for(mUpdateInterval);
+        }
+    }
+
+    void ScreenManager::setRoot(widgets::Widget::shared_ptr widget)
+    {
+        mRoot = widget;
+        mRoot->ComputeChildSize(mDisplay->getSize());
+    }
+
+} // namespace frame

frame/src/ScreenManager.hpp

@@ -0,0 +1,36 @@
+#pragma once
+#include "display/IDisplay.hpp"
+#include "render/RenderTarget.hpp"
+#include "widgets/Widget.hpp"
+
+#include <chrono>
+#include <memory>
+
+using namespace std::chrono_literals;
+
+namespace frame
+{
+
+    class ScreenManager
+    {
+        std::unique_ptr<display::IDisplay> mDisplay;
+
+        render::RenderTarget mRenderTarget;
+        widgets::Widget::shared_ptr mRoot;
+
+        std::chrono::duration<double> mUpdateInterval = 0.5s;
+
+        bool mIsRunning = true;
+
+    public:
+        ScreenManager(std::unique_ptr<display::IDisplay> pDisplay);
+
+        void Update();
+        void Render();
+
+        void MainLoop();
+
+        void setRoot(widgets::Widget::shared_ptr widget);
+    };
+
+} // namespace frame

frame/src/ServiceLocator.cpp

@@ -0,0 +1,19 @@
+#include "ServiceLocator.hpp"
+
+namespace frame
+{
+
+    IService::IService(std::string_view name)
+        : name(name)
+    {
+    }
+
+    std::string_view IService::getName() const
+    {
+        return name;
+    }
+
+    std::unordered_map<std::type_index, std::shared_ptr<IService>>
+        Service::Services = {};
+
+} // namespace frame

frame/src/ServiceLocator.hpp

@@ -0,0 +1,40 @@
+#pragma once
+#include <memory>
+#include <string>
+#include <typeindex>
+#include <typeinfo>
+#include <unordered_map>
+
+namespace frame
+{
+    class IService
+    {
+        std::string name;
+
+    public:
+        IService(std::string_view name);
+        virtual ~IService() = default;
+
+        std::string_view getName() const;
+    };
+
+    class Service
+    {
+        static std::unordered_map<std::type_index, std::shared_ptr<IService>>
+            Services;
+
+    public:
+        template<class SERVICE>
+        static std::shared_ptr<SERVICE> get()
+        {
+            auto const type = std::type_index(typeid(SERVICE));
+            if(Services.find(type) == Services.end())
+            {
+                Services[type] = std::make_shared<SERVICE>();
+            }
+
+            return std::static_pointer_cast<SERVICE>(Services[type]);
+        }
+    };
+
+} // namespace frame

frame/src/display/Display.cpp

@@ -1,6 +1,6 @@
 #include "Display.hpp"
 
-#include "../Config.h"
+#include "../BuildConfig.h"
 
 #ifdef BUILD_EPD
 #    include "EPD_7in5_V2.hpp"

frame/src/display/IDisplay.hpp

@@ -12,6 +12,8 @@ namespace frame::display
         std::string mName;
         Size mSize;
 
+        bool mIsOpen = true;
+
     public:
         IDisplay(std::string_view pName, Size pSize)
             : mName(pName)
@@ -33,5 +35,15 @@ namespace frame::display
         {
             return mSize;
         }
+
+        bool isOpen() const
+        {
+            return mIsOpen;
+        }
+
+        void Close()
+        {
+            mIsOpen = false;
+        }
     };
 } // namespace frame::display

frame/src/display/VirtualDisplay.cpp

@@ -55,6 +55,10 @@ namespace frame::display
         sf::Event ev;
         while(window.pollEvent(ev))
         {
+            if(ev.type == sf::Event::Closed)
+            {
+                Close();
+            }
         }
     }
 

frame/src/font/Font.cpp

@@ -0,0 +1,107 @@
+#include "Font.hpp"
+
+#include <fstream>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+namespace frame::font
+{
+
+    std::shared_ptr<Font> Font::LoadFromFile(std::string_view file)
+    {
+        try
+        {
+            std::fstream file_data(std::string{file}, std::ios::in);
+
+            auto out = std::make_shared<Font>();
+            out->LoadFromStream(file_data);
+            return out;
+        }
+        catch(std::exception const& e)
+        {
+            return nullptr;
+        }
+    }
+
+    Glyph const& Font::getGlyph(uint32_t size, char c) const
+    {
+        return sizes.at(size).at(c);
+    }
+
+    uint32_t Font::getLength(std::string_view text, uint32_t size) const
+    {
+        uint32_t length = 0;
+
+        for(auto c : text)
+        {
+            auto const& g = getGlyph(size, c);
+            length += g.advance;
+        }
+        return length;
+    }
+
+    uint32_t Font::getHeight(std::string_view text, uint32_t size) const
+    {
+        uint32_t height = 0;
+
+        for(auto c : text)
+        {
+            auto const& g = getGlyph(size, c);
+            height        = std::max((uint32_t)g.height, height);
+        }
+        return height;
+    }
+
+    int32_t Font::getMaxYOffset(std::string_view text, uint32_t size) const
+    {
+        int32_t y_offset = 0;
+
+        for(auto c : text)
+        {
+            auto const& g = getGlyph(size, c);
+            y_offset      = std::min(g.y_offset, y_offset);
+        }
+        return y_offset;
+    }
+
+    uint32_t Font::getOptimalSize(std::string_view text, Rect rect) const
+    {
+        auto best_size = 0;
+
+        for(auto const& [size, value] : sizes)
+        {
+            auto width  = getLength(text, size);
+            auto height = getHeight(text, size);
+
+            if(rect.width < width || rect.height < height)
+                break;
+            else
+                best_size = size;
+        }
+        return best_size;
+    }
+
+    void Font::LoadFromStream(std::istream& os)
+    {
+        json file_data = json::parse(os);
+
+        name = file_data["name"];
+
+        for(auto& [key, el] : file_data["sizes"].items())
+        {
+            auto size = std::atoi(key.c_str());
+
+            Glyphs curren_glyphs;
+            lineSpacing[size] = el["LineSpacing"];
+
+            for(auto& [glyph_c, glyph_d] : el["Glyphs"].items())
+            {
+                curren_glyphs[glyph_c[0]] = std::move(Glyph{glyph_d});
+            }
+
+            sizes[size] = std::move(curren_glyphs);
+        }
+    }
+
+} // namespace frame::font

frame/src/font/Font.hpp

@@ -0,0 +1,42 @@
+#pragma once
+
+#include "../Rect.hpp"
+#include "Glyph.hpp"
+
+#include <map>
+#include <memory>
+#include <string_view>
+
+
+namespace frame::font
+{
+    using Glyphs      = std::map<char, Glyph>;
+    using LineSpacing = std::map<uint32_t, uint32_t>;
+
+    class Font
+    {
+        std::string name;
+        std::map<uint32_t, Glyphs> sizes;
+        LineSpacing lineSpacing;
+
+    public:
+        Font() = default;
+        static std::shared_ptr<Font> LoadFromFile(std::string_view file);
+
+        Glyph const& getGlyph(uint32_t size, char c) const;
+
+        uint32_t getLength(std::string_view text, uint32_t size) const;
+        uint32_t getHeight(std::string_view text, uint32_t size) const;
+        int32_t getMaxYOffset(std::string_view text, uint32_t size) const;
+
+        uint32_t getOptimalSize(std::string_view text, Rect rect) const;
+
+        uint32_t getLineSpacing(uint32_t size) const
+        {
+            return lineSpacing.at(size);
+        }
+
+    protected:
+        void LoadFromStream(std::istream& os);
+    };
+} // namespace frame::font

frame/src/font/FontRegistry.cpp

@@ -0,0 +1,98 @@
+#include "FontRegistry.hpp"
+
+#include <filesystem>
+#include <fmt/format.h>
+
+namespace fs = std::filesystem;
+
+namespace frame::font
+{
+    std::shared_ptr<Font> GetFont(std::string_view name)
+    {
+        return Service::get<FontRegistry>()->Get(name);
+    }
+
+    bool LoadFont(std::string_view name)
+    {
+        return Service::get<FontRegistry>()->Load(name);
+    }
+
+    FontRegistry& LocateRegistry()
+    {
+        return *Service::get<FontRegistry>();
+    }
+
+    FontRegistry::FontRegistry()
+        : IService("FontRegistry")
+    {
+    }
+
+    void FontRegistry::LoadFromConfig(FontConfig const& config)
+    {
+        fs::path base{config.base_path};
+
+        for(auto const& [name, file] : config.fonts)
+        {
+            Load(name, (base / file).string());
+        }
+    }
+
+    bool FontRegistry::Load(std::string_view name)
+    {
+        if(fonts.find(std::string{name}) != fonts.end())
+        {
+            fmt::print("Font {} allready loaded!\n", name);
+            return true;
+        } else
+        {
+            fmt::print("Loading font \"{}\": ", name);
+            auto ptr = Font::LoadFromFile(fmt::format("{}.json", name));
+
+            if(ptr == nullptr)
+            {
+                fmt::print("Error not found!\n");
+            } else
+            {
+                fonts[std::string{name}] = ptr;
+                fmt::print("OK\n");
+                return true;
+            }
+        }
+        return false;
+    }
+
+    bool FontRegistry::Load(std::string_view name, std::string_view path)
+    {
+        if(fonts.find(std::string{name}) != fonts.end())
+        {
+            fmt::print("Font {} allready loaded!\n", name);
+            return true;
+        }
+
+        fmt::print("Loading font \"{}\": ", name);
+        auto ptr = Font::LoadFromFile(path);
+
+        if(ptr == nullptr)
+        {
+            fmt::print("Error not found!\n");
+        } else
+        {
+            fonts[std::string{name}] = ptr;
+            fmt::print("OK\n");
+            return true;
+        }
+        return false;
+    }
+
+    std::shared_ptr<Font> FontRegistry::Get(std::string_view name)
+    {
+        auto it = fonts.find({std::string{name}});
+        if(it == fonts.end())
+        {
+            if(!Load(name))
+                return nullptr;
+            it = fonts.find({std::string{name}});
+        }
+        return it->second;
+    }
+} // namespace frame::font

frame/src/font/FontRegistry.hpp

@@ -0,0 +1,31 @@
+#pragma once
+
+#include "../Config.hpp"
+#include "../ServiceLocator.hpp"
+#include "Font.hpp"
+
+#include <memory>
+#include <unordered_map>
+
+namespace frame::font
+{
+    class FontRegistry;
+
+    std::shared_ptr<Font> GetFont(std::string_view name);
+    bool LoadFont(std::string_view name);
+    FontRegistry& LocateRegistry();
+
+    class FontRegistry : public IService
+    {
+        std::unordered_map<std::string, std::shared_ptr<Font>> fonts;
+
+    public:
+        FontRegistry();
+
+        void LoadFromConfig(FontConfig const& config);
+        bool Load(std::string_view name);
+        bool Load(std::string_view name, std::string_view path);
+        std::shared_ptr<Font> Get(std::string_view name);
+    };
+
+} // namespace frame::font

frame/src/font/Glyph.cpp

@@ -0,0 +1,39 @@
+#include "Glyph.hpp"
+
+namespace frame::font
+{
+    Glyph::Glyph(json const& data)
+    {
+        height   = data["height"];
+        width    = data["width"];
+        x_offset = data["x_offset"];
+        y_offset = data["y_offset"];
+        advance  = data["advance"];
+
+        image.Create(width, height);
+
+        auto& image_data = data["data"];
+
+        int index = 0;
+        for(auto y = 0; y < height; ++y)
+        {
+            for(auto x = 0; x < width; ++x)
+            {
+                uint8_t i      = image_data[index];
+                image.at(x, y) = i * 0xFF;
+                ++index;
+            }
+        }
+    }
+
+    void Glyph::operator=(Glyph const& glyph)
+    {
+        image    = glyph.image;
+        height   = glyph.height;
+        width    = glyph.width;
+        x_offset = glyph.x_offset;
+        y_offset = glyph.y_offset;
+        advance  = glyph.advance;
+    }
+
+} // namespace frame::font

frame/src/font/Glyph.hpp

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "../Image.hpp"
+
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+namespace frame::font
+{
+    struct Glyph
+    {
+        Image image;
+        uint8_t height;
+        uint8_t width;
+        int32_t x_offset;
+        int32_t y_offset;
+        int32_t advance;
+
+    public:
+        Glyph() = default;
+        Glyph(json const& data);
+        Glyph(Glyph const&) = default;
+        Glyph(Glyph&&)      = default;
+
+        void operator=(Glyph const& glyph);
+    };
+} // namespace frame::font

frame/src/main.cpp

@@ -6,13 +6,59 @@
 
 using namespace std::chrono_literals;
 
+#include "Config.hpp"
+#include "ScreenManager.hpp"
 #include "display/Display.hpp"
-#include "render/RenderTarget.hpp"
+#include "font/FontRegistry.hpp"
+//#include "render/RenderTarget.hpp"
+//#include "widgets/clock/Analog.hpp"
+#include "widgets/ContainerWidget.hpp"
+#include "widgets/WidgetRegistry.hpp"
 
+int main()
+{
+    // == == Config == ==
+    auto config = Config::Load();
+
+    // == == Display == ==
+    auto display = frame::display::Create();
+
+    if(!display)
+    {
+        fmt::print("Error: Not display driver!");
+        return 0;
+    }
+
+    display->Init();
+
+    // frame::font::LoadFont("Fira Code");
+    frame::font::LocateRegistry().LoadFromConfig(config.font);
+
+    frame::ScreenManager screen(std::move(display));
+
+    auto const& widgets = frame::Service::get<frame::widgets::WidgetRegistry>();
+
+    // std::shared_ptr<frame::widgets::ContainerWidget> con =
+    //     std::static_pointer_cast<frame::widgets::ContainerWidget>(
+    //         widgets->Create("AnalogClock"));
+
+    // con->setSlot(0, widgets->Create("DigitalClock"));
+
+    // con->setSlot(1, widgets->Create("Date"));
+
+    auto con = frame::widgets::LocateRegistry().BuildFromConfig(config.root);
+    screen.setRoot(con);
+
+    screen.MainLoop();
+}
+
+/*
 int main()
 {
     constexpr double pi = 3.14159;
 
+    auto font = frame::font::Font::LoadFromFile("Fira Code.json");
+
     auto display = frame::display::Create();
 
     if(!display)
@@ -62,13 +108,109 @@ int main()
                     {110, (int)display->getSize().height - 10},
                     5);
 
+    target.DrawText("Hallo Welt!", {100, 50}, *font, 14);
+    target.DrawText("Hallo Welt!", {50, 100}, *font, 30);
+
     display->Display(target.getImage());
 
     std::this_thread::sleep_for(10s);
 
+    target.Clear();
+
+    frame::Vector pos = display->getSize() / 2;
+
+    auto text = "10:30";
+
+    pos.x -= font->getLength(text, 250) / 2;
+    pos.y += font->getHeight(text, 250) / 2;
+    pos.y -= font->getMaxYOffset(text, 250) + font->getHeight(text, 250);
+
+    // target.DrawTextGlyphBounds(text, pos, *font, 250);
+    // target.DrawLine({0, (int32_t)pos.y},
+    //                  {(int32_t)display->getSize().width, pos.y});
+
+    auto rect = frame::Rect{0,
+                            0,
+                            (int)display->getSize().width,
+                            (int)display->getSize().height};
+
+    target.DrawText(rect, text, *font, 250);
+    display->Display(target.getImage());
+    std::this_thread::sleep_for(2s);
+
+    target.Clear();
+    target.DrawText(rect, text, *font, 250, frame::AlignHorizontal::CENTER);
+    display->Display(target.getImage());
+    std::this_thread::sleep_for(2s);
+
+    target.Clear();
+    target.DrawText(rect, text, *font, 250, frame::AlignHorizontal::RIGHT);
+    display->Display(target.getImage());
+    std::this_thread::sleep_for(2s);
+
+    target.Clear();
+    target.DrawText(rect,
+                    text,
+                    *font,
+                    250,
+                    frame::AlignHorizontal::LEFT,
+                    frame::AlignVertical::CENTER);
+    display->Display(target.getImage());
+    std::this_thread::sleep_for(2s);
+
+    target.Clear();
+    target.DrawText(rect,
+                    text,
+                    *font,
+                    250,
+                    frame::AlignHorizontal::CENTER,
+                    frame::AlignVertical::CENTER);
+    display->Display(target.getImage());
+    std::this_thread::sleep_for(2s);
+
+    target.Clear();
+    target.DrawText(rect,
+                    text,
+                    *font,
+                    250,
+                    frame::AlignHorizontal::RIGHT,
+                    frame::AlignVertical::CENTER);
+    display->Display(target.getImage());
+    std::this_thread::sleep_for(2s);
+
+    target.Clear();
+    target.DrawText(rect,
+                    text,
+                    *font,
+                    250,
+                    frame::AlignHorizontal::LEFT,
+                    frame::AlignVertical::BOTTOM);
+    display->Display(target.getImage());
+    std::this_thread::sleep_for(2s);
+
+    target.Clear();
+    target.DrawText(rect,
+                    text,
+                    *font,
+                    250,
+                    frame::AlignHorizontal::CENTER,
+                    frame::AlignVertical::BOTTOM);
+    display->Display(target.getImage());
+    std::this_thread::sleep_for(2s);
+
+    target.Clear();
+    target.DrawText(rect,
+                    text,
+                    *font,
+                    250,
+                    frame::AlignHorizontal::RIGHT,
+                    frame::AlignVertical::BOTTOM);
+    display->Display(target.getImage());
+    std::this_thread::sleep_for(2s);
+
     display->Clear(frame::display::Color::WHITE);
 }
-
+*/
 /*
 #include <EPD_7in5_V2.h>
 

frame/src/render/RenderTarget.cpp

@@ -7,15 +7,25 @@ namespace frame::render
 
     RenderTarget::RenderTarget(Size size)
         : image(size)
+        , root_size{0, 0, (int)size.width, (int)size.height}
     {
     }
 
     void RenderTarget::DrawPixel(Vector const& position, Color color)
     {
-        if(position.x < 0 || position.y < 0 || position.x >= image.getWidth()
+        auto current = getCurrentSize();
-           || position.y >= image.getHeight())
+
+        if(position.x < 0 || position.y < 0 || position.x >= current.width
+           || position.y >= current.height
+           || (position.x + current.left) >= root_size.width
+           || (position.y + current.top) >= root_size.height)
             return;
-        image.at(position.x, position.y) = color;
+        if(!invert)
+            image.at(position.x + current.left, position.y + current.top) =
+                color;
+        else
+            image.at(position.x + current.left, position.y + current.top) ^=
+                color;
     }
 
     void RenderTarget::DrawLine(Vector const& start,
@@ -77,12 +87,16 @@ namespace frame::render
 
     void RenderTarget::DrawCircle(Vector const& center,
                                   int32_t radius,
+                                  int32_t line,
                                   Color color)
     {
         int32_t const r_2 = radius * radius;
         Vector pos{0, -radius};
 
-        DrawPointsMirrorCircle(center, pos, color);
+        for(auto i = 0; i < line; ++i)
+        {
+            DrawPointsMirrorCircle(center, {pos.x, pos.y + i}, color);
+        }
 
         while(pos.x <= radius / std::sqrt(2.f))
         {
@@ -102,7 +116,10 @@ namespace frame::render
                 E += 2 * pos.x - 2 * pos.y + 5;
             }
 
-            DrawPointsMirrorCircle(center, pos, color);
+            for(auto i = 0; i < line; ++i)
+            {
+                DrawPointsMirrorCircle(center, {pos.x, pos.y + i}, color);
+            }
         }
     }
 
@@ -142,6 +159,146 @@ namespace frame::render
                        {BottomRight.x, BottomRight.y - lw});
     }
 
+    void
+        RenderTarget::DrawRect(Rect const& rect, uint8_t LineWidth, Color color)
+    {
+        DrawRect(Vector{rect.left, rect.top},
+                 Vector{rect.left + rect.width, rect.top + rect.height},
+                 LineWidth,
+                 color);
+    }
+
+    void RenderTarget::DrawImage(Vector topLeft, Image const& image)
+    {
+        auto pos = topLeft;
+
+        for(auto y = 0; y < image.getHeight(); ++y)
+        {
+            for(auto x = 0; x < image.getWidth(); ++x)
+            {
+                DrawPixel({pos.x + x, pos.y + y}, (Color)image.at(x, y));
+            }
+        }
+    }
+
+    Vector RenderTarget::DrawGlyph(Vector centerLine,
+                                   font::Glyph const& g,
+                                   Color color)
+    {
+        auto const& height = g.height;
+
+        Vector topleft = centerLine;
+        topleft.x += g.x_offset;
+        topleft.y += g.y_offset;
+
+        DrawImage(topleft, g.image);
+        centerLine.x += g.advance;
+        return centerLine;
+    }
+
+    void RenderTarget::DrawText(std::string_view pText,
+                                Vector pCenterLineStart,
+                                font::Font const& pFont,
+                                uint32_t size)
+    {
+        auto pos = pCenterLineStart;
+        for(auto c : pText)
+        {
+            pos = DrawGlyph(pos, pFont.getGlyph(size, c));
+        }
+    }
+
+    void RenderTarget::DrawText(Rect rect,
+                                std::string pText,
+                                font::Font const& pFont,
+                                uint32_t size,
+                                AlignHorizontal alignHorizontal,
+                                AlignVertical alignVertical)
+    {
+        auto const lineSpacing   = pFont.getLineSpacing(size);
+        auto const lineSpacing_3 = lineSpacing / 3;
+
+        Vector start{rect.left, rect.top};
+        auto text_height = pFont.getHeight(pText, size);
+        auto length      = pFont.getLength(pText, size);
+        auto y_offset    = pFont.getMaxYOffset(pText, size);
+
+        switch(alignVertical)
+        {
+            case AlignVertical::TOP: start.y -= y_offset; break;
+            case AlignVertical::CENTER:
+                start.y += rect.height / 2;
+                start.y += text_height / 2;
+                start.y -= y_offset + text_height;
+                break;
+            case AlignVertical::BOTTOM:
+                start.y += rect.height;
+                start.y -= text_height + y_offset;
+                break;
+        }
+
+        switch(alignHorizontal)
+        {
+            case AlignHorizontal::CENTER:
+                start.x += rect.width / 2;
+                start.x -= length / 2;
+                break;
+
+            case AlignHorizontal::RIGHT: start.x += rect.width - length; break;
+        }
+
+        DrawText(pText, start, pFont, size);
+    }
+
+    void RenderTarget::DrawTextGlyphBounds(std::string_view pText,
+                                           Vector pCenterLineStart,
+                                           font::Font const& pFont,
+                                           uint32_t size)
+    {
+        auto pos = pCenterLineStart;
+
+        auto lineSpacing = pFont.getLineSpacing(size);
+        auto _3          = lineSpacing / 3;
+        for(auto c : pText)
+        {
+            auto const& g = pFont.getGlyph(size, c);
+            DrawRect({int32_t(pos.x), int32_t(pos.y - _3 * 2)},
+                     {int32_t(pos.x + g.advance), int32_t(pos.y + _3)},
+                     1);
+
+            pos.x += g.advance;
+        }
+    }
+
+    void RenderTarget::Clear(Color color)
+    {
+        image.Clear(color);
+    }
+
+    Rect RenderTarget::getCurrentSize() const
+    {
+        if(Scissor.size() == 0)
+        {
+            return root_size;
+        }
+        return Scissor.top();
+    }
+
+    void RenderTarget::pushViewport(Rect rect)
+    {
+        auto current = getCurrentSize();
+
+        Scissor.push({current.top + rect.top,
+                      current.left + rect.left,
+                      rect.width,
+                      rect.height});
+    }
+
+    void RenderTarget::popViewport()
+    {
+        Scissor.pop();
+    }
+
     void RenderTarget::DrawPointsMirrorCircle(Vector const& center,
                                               Vector const& pos,
                                               Color color)

frame/src/render/RenderTarget.hpp

@@ -2,7 +2,17 @@
 
 #include "../Color.hpp"
 #include "../Image.hpp"
+#include "../Rect.hpp"
 #include "../Vector.hpp"
+#include "../font/Font.hpp"
+
+#include <stack>
+
+namespace frame
+{
+    enum class AlignVertical { TOP, CENTER, BOTTOM };
+    enum class AlignHorizontal { LEFT, CENTER, RIGHT };
+} // namespace frame
 
 namespace frame::render
 {
@@ -11,6 +21,11 @@ namespace frame::render
     {
         Image image;
 
+        Rect root_size;
+        std::stack<Rect> Scissor;
+
+        bool invert = false;
+
     public:
         RenderTarget(Size size);
 
@@ -22,19 +37,63 @@ namespace frame::render
 
         void DrawCircle(Vector const& center,
                         int32_t radius,
+                        int32_t line,
                         Color color = BLACK);
 
-        void DrawRectFilled(Vector const& TopLeft, Vector const& BottomRight, Color color = BLACK);
+        void DrawRectFilled(Vector const& TopLeft,
+                            Vector const& BottomRight,
+                            Color color = BLACK);
 
-        void DrawRect(Vector const& TopLeft, Vector const& BottomRight, uint8_t LineWidth, Color color = BLACK);
+        void DrawRect(Vector const& TopLeft,
+                      Vector const& BottomRight,
+                      uint8_t LineWidth,
+                      Color color = BLACK);
+
+        void DrawRect(Rect const& rect, uint8_t LineWidth, Color color = BLACK);
+
+        void DrawImage(Vector topLeft, Image const& image);
+
+        Vector DrawGlyph(Vector centerLine,
+                         font::Glyph const& g,
+                         Color color = BLACK);
+
+        void DrawText(std::string_view pText,
+                      Vector pCenterLineStart,
+                      font::Font const& pFont,
+                      uint32_t size);
+
+        void DrawText(Rect rect,
+                      std::string pText,
+                      font::Font const& pFont,
+                      uint32_t size,
+                      AlignHorizontal alignHorizontal = AlignHorizontal::LEFT,
+                      AlignVertical alignVertical     = AlignVertical::TOP);
+
+        void DrawTextGlyphBounds(std::string_view pText,
+                                 Vector pCenterLineStart,
+                                 font::Font const& pFont,
+                                 uint32_t size);
+
+        void Clear(Color color = WHITE);
 
         Image const& getImage()
         {
             return image;
         }
-    private:
-        void DrawPointsMirrorCircle(Vector const& center, Vector const& pos, Color color);
 
+        Rect getCurrentSize() const;
+        void pushViewport(Rect rect);
+        void popViewport();
+
+        void setInvert(bool pInvert)
+        {
+            invert = pInvert;
+        }
+
+    private:
+        void DrawPointsMirrorCircle(Vector const& center,
+                                    Vector const& pos,
+                                    Color color);
     };
 
 } // namespace frame::render

frame/src/widgets/ContainerWidget.cpp

@@ -0,0 +1,35 @@
+#include "ContainerWidget.hpp"
+
+namespace frame::widgets
+{
+    ContainerWidget::ContainerWidget(size_t slots)
+    {
+        widgets.resize(slots);
+        maxSlots = slots;
+    }
+
+    Widget::shared_ptr ContainerWidget::getSlot(size_t slot) const
+    {
+        if(slot >= maxSlots)
+            return nullptr;
+        return widgets[slot];
+    }
+
+    void ContainerWidget::setSlot(size_t slot, Widget::shared_ptr ptr)
+    {
+        ptr->setParent(this);
+        widgets[slot] = ptr;
+    }
+
+    void ContainerWidget::UpdateWidgets()
+    {
+        for(auto& el : widgets)
+        {
+            if(el)
+            {
+                el->Update();
+            }
+        }
+    }
+
+} // namespace frame::widgets

frame/src/widgets/ContainerWidget.hpp

@@ -0,0 +1,23 @@
+#pragma once
+#include "Widget.hpp"
+
+#include <vector>
+
+namespace frame::widgets
+{
+
+    class ContainerWidget : public Widget
+    {
+        std::vector<Widget::shared_ptr> widgets;
+        size_t maxSlots = 0;
+
+    public:
+        ContainerWidget(size_t slots);
+
+        Widget::shared_ptr getSlot(size_t slot) const;
+        void setSlot(size_t slot, Widget::shared_ptr);
+
+        void UpdateWidgets();
+    };
+
+} // namespace frame::widgets

frame/src/widgets/Widget.cpp

@@ -0,0 +1,56 @@
+#include "Widget.hpp"
+
+namespace frame::widgets
+{
+
+    Widget::week_ptr Widget::getParent() const
+    {
+        return mParent;
+    }
+
+    void Widget::setParent(week_ptr ptr)
+    {
+        mParent = ptr;
+    }
+
+    bool Widget::isDirty() const
+    {
+        return mDirty;
+    }
+
+    void Widget::setSize(Vector size)
+    {
+        mSize = size;
+        ComputeChildSize(size);
+    }
+
+    Vector const& Widget::getSize() const
+    {
+        return mSize;
+    }
+
+    void Widget::setPosition(Vector size)
+    {
+        mRelativePosition = size;
+    }
+
+    Vector Widget::getPosition() const
+    {
+        return mRelativePosition;
+    }
+
+    void Widget::setDirty()
+    {
+        mDirty = true;
+        if(mParent)
+        {
+            mParent->setDirty();
+        }
+    }
+
+    void Widget::setClear()
+    {
+        mDirty = false;
+    }
+
+} // namespace frame::widgets

frame/src/widgets/Widget.hpp

@@ -0,0 +1,44 @@
+#pragma once
+#include "../Rect.hpp"
+#include "../render/RenderTarget.hpp"
+
+#include <memory>
+
+namespace frame::widgets
+{
+
+    class Widget
+    {
+    public:
+        using shared_ptr = std::shared_ptr<Widget>;
+        using week_ptr   = Widget*;
+
+    public:
+        virtual ~Widget() = default;
+
+        virtual void Update()                         = 0;
+        virtual void Render(render::RenderTarget& rt) = 0;
+        virtual void ComputeChildSize(Vector size){};
+
+        week_ptr getParent() const;
+        void setParent(week_ptr ptr);
+
+        void setSize(Vector size);
+        Vector const& getSize() const;
+
+        void setPosition(Vector size);
+        Vector getPosition() const;
+
+        bool isDirty() const;
+        void setDirty();
+        void setClear();
+
+    private:
+        week_ptr mParent = nullptr;
+        bool mDirty      = true;
+
+        Vector mRelativePosition;
+        Vector mSize;
+    };
+
+} // namespace frame::widgets

frame/src/widgets/WidgetRegistry.cpp

@@ -0,0 +1,43 @@
+#include "WidgetRegistry.hpp"
+
+#include "ContainerWidget.hpp"
+
+namespace frame::widgets
+{
+
+    WidgetRegistry::WidgetRegistry()
+        : IService("WidgetRegistry")
+    {
+    }
+
+    Widget::shared_ptr WidgetRegistry::Create(std::string_view name) const
+    {
+        auto it = mWidgets.find(std::string{name});
+        if(it == mWidgets.end())
+        {
+            fmt::print("[ERROR] Widget {} not found!\n", name);
+            return nullptr;
+        }
+        return it->second();
+    }
+
+    Widget::shared_ptr WidgetRegistry::BuildFromConfig(WidgetConfig const& w)
+    {
+        fmt::print("INFO: Creating widget {} \n", w.name);
+        auto widget = Create(w.name);
+
+        auto container = std::dynamic_pointer_cast<ContainerWidget>(widget);
+        if(container)
+        {
+            int counter = 0;
+            for(auto const& el : w.widgets)
+            {
+                int slot = el.slot ? el.slot.value() : counter;
+
+                container->setSlot(slot, BuildFromConfig(el));
+            }
+        }
+        return widget;
+    }
+
+} // namespace frame::widgets

frame/src/widgets/WidgetRegistry.hpp

@@ -0,0 +1,59 @@
+#pragma once
+#include "../Config.hpp"
+#include "../ServiceLocator.hpp"
+#include "Widget.hpp"
+
+#include <fmt/format.h>
+#include <functional>
+#include <string>
+#include <unordered_map>
+
+#define REGISTER_WIDGET(TYPE, NAME)                                            \
+    static bool registered =                                                   \
+        frame::Service::get<frame::widgets::WidgetRegistry>()->Register<TYPE>( \
+            NAME)
+
+namespace frame::widgets
+{
+    class WidgetRegistry : public IService
+    {
+
+        using Creator = std::function<Widget::shared_ptr()>;
+
+        std::unordered_map<std::string, Creator> mWidgets;
+
+    public:
+        WidgetRegistry();
+
+        template<class WIDGET>
+        bool Register(std::string_view name);
+
+        Widget::shared_ptr Create(std::string_view name) const;
+
+        Widget::shared_ptr BuildFromConfig(WidgetConfig const& w);
+    };
+
+    inline WidgetRegistry& LocateRegistry()
+    {
+        return *Service::get<frame::widgets::WidgetRegistry>();
+    }
+
+    template<class WIDGET>
+    bool WidgetRegistry::Register(std::string_view name)
+    {
+        auto const name_string = std::string{name};
+        if(mWidgets.find(name_string) != mWidgets.end())
+        {
+            fmt::print("Widget {} already registered!\n", name);
+            return true;
+        }
+
+        mWidgets[name_string] = []() -> Widget::shared_ptr {
+            return WIDGET::Create();
+        };
+
+        fmt::print("Widget {} registered!\n", name);
+        return true;
+    }
+
+} // namespace frame::widgets

frame/src/widgets/clock/Analog.cpp

@@ -0,0 +1,180 @@
+#include "Analog.hpp"
+
+#include "../../font/FontRegistry.hpp"
+
+#include <ctime>
+#include <fmt/chrono.h>
+#include <fmt/format.h>
+
+constexpr double pi = 3.14159;
+
+#include "../WidgetRegistry.hpp"
+
+REGISTER_WIDGET(frame::widgets::AnalogClock, "AnalogClock");
+
+namespace frame::widgets
+{
+
+    Widget::shared_ptr AnalogClock::Create()
+    {
+        return std::make_shared<AnalogClock>();
+    }
+
+    AnalogClock::AnalogClock()
+        : ContainerWidget(2)
+    {
+    }
+
+    void AnalogClock::Update()
+    {
+        auto const now = std::chrono::system_clock::now();
+        auto const min = std::chrono::floor<std::chrono::minutes>(now);
+
+        if(last_time != min)
+        {
+            setDirty();
+            last_time = min;
+        }
+
+        UpdateWidgets();
+    }
+
+    void AnalogClock::Render(render::RenderTarget& rt)
+    {
+        auto const size = rt.getCurrentSize();
+        auto const min  = std::min(size.height, size.width);
+
+        auto const radius = (min / 2) - 10;
+
+        auto const center = Vector{size.width / 2, size.height / 2};
+
+        rt.DrawCircle(center, radius, 4);
+        rt.DrawCircle(center, 6, 4);
+
+        auto step = 360 / 60;
+
+        for(int i = 0; i < 60; ++i)
+        {
+            double const x = std::cos(step * i * pi / 180.f);
+            double const y = std::sin(step * i * pi / 180.f);
+
+            auto lineLength = 10;
+            if(i % 5 == 0)
+            {
+                lineLength = 20;
+                if(i % 3 == 0)
+                {
+                    lineLength = 50;
+                }
+            }
+
+            auto const fromCenter = radius - lineLength;
+
+            rt.DrawLine({int32_t(x * (radius - 1) + center.x),
+                         int32_t(y * (radius - 1) + center.y)},
+                        {int32_t(x * fromCenter + center.x),
+                         int32_t(y * fromCenter + center.y)});
+        }
+
+        // pls c++ 20
+        std::time_t t = std::chrono::system_clock::to_time_t(last_time);
+        auto c_time   = std::localtime(&t);
+
+        // Render Pointer Minute
+
+        auto const min_steps = 360 / 60;
+        auto const min_rad   = (min_steps * c_time->tm_min - 90) * pi / 180.f;
+
+        rt.DrawLine(center,
+                    {center.x + int32_t(std::cos(min_rad) * radius * 0.8),
+                     center.y + int32_t(std::sin(min_rad) * radius * 0.8)});
+
+        // Render Pointer Hour
+
+        auto const hour_steps    = 360 / 12;
+        auto hour_deg            = (hour_steps * c_time->tm_hour - 90);
+        auto const normalied_min = (c_time->tm_min / 59.0);
+        hour_deg += int32_t(normalied_min * hour_steps);
+
+        auto const hour_rad = hour_deg * pi / 180.f;
+
+        rt.DrawLine(center,
+                    {center.x + int32_t(std::cos(hour_rad) * radius * 0.6),
+                     center.y + int32_t(std::sin(hour_rad) * radius * 0.6)});
+
+        setClear();
+
+        // == Widgets ==
+
+        auto widget_center_1 = center;
+        widget_center_1.y -= radius / 2;
+
+        auto widget_center_2 = center;
+        widget_center_2.y += radius / 2;
+
+        auto const widget_height_h = radius / 4;
+        auto const widget_width_h  = radius / 2;
+
+        Rect widget_box_1{widget_center_1.y - widget_height_h,
+                          widget_center_1.x - widget_width_h,
+                          widget_width_h * 2,
+                          widget_height_h * 2};
+
+        Rect widget_box_2{widget_center_2.y - widget_height_h,
+                          widget_center_2.x - widget_width_h,
+                          widget_width_h * 2,
+                          widget_height_h * 2};
+
+        // Top
+
+        auto top = getSlot(0);
+        if(top)
+        {
+            top->setSize({widget_box_1.width, widget_box_1.height});
+            rt.pushViewport(widget_box_1);
+            top->Render(rt);
+            rt.popViewport();
+        }
+
+        auto bottom = getSlot(1);
+        if(bottom)
+        {
+            bottom->setSize({widget_box_2.width, widget_box_2.height});
+            rt.pushViewport(widget_box_2);
+            bottom->Render(rt);
+            rt.popViewport();
+        }
+
+        // Text
+
+        /*auto font = font::GetFont("Fira Code");
+
+        if(!font)
+            return;
+
+        auto text = fmt::format("{:%d.%m.%Y}", fmt::localtime(t));
+
+        auto text_center = center;
+        text_center.y += radius / 2;
+
+        auto const text_height_h = radius / 4;
+        auto const text_width_h  = radius / 2;
+
+        Rect text_box{text_center.y - text_height_h,
+                      text_center.x - text_width_h,
+                      text_width_h * 2,
+                      text_height_h * 2};
+
+        auto font_size = font->getOptimalSize(text, text_box);
+
+        rt.setInvert(true);
+        rt.DrawText(text_box,
+                    text,
+                    *font,
+                    font_size,
+                    AlignHorizontal::CENTER,
+                    AlignVertical::CENTER);
+        rt.setInvert(false);*/
+    }
+
+} // namespace frame::widgets

frame/src/widgets/clock/Analog.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "../ContainerWidget.hpp"
+
+#include <chrono>
+
+namespace frame::widgets
+{
+
+    class AnalogClock : public ContainerWidget
+    {
+        using Time = std::chrono::time_point<std::chrono::system_clock>;
+
+        Time last_time;
+
+    public:
+        static Widget::shared_ptr Create();
+
+        AnalogClock();
+
+        void Update() override;
+        void Render(render::RenderTarget& rt) override;
+    };
+} // namespace frame::widgets

frame/src/widgets/clock/Date.cpp

@@ -0,0 +1,56 @@
+#include "Date.hpp"
+
+REGISTER_WIDGET(frame::widgets::Date, "Date");
+
+#include "../../font/FontRegistry.hpp"
+
+#include <ctime>
+#include <fmt/chrono.h>
+#include <fmt/format.h>
+
+namespace frame::widgets
+{
+
+    Widget::shared_ptr Date::Create()
+    {
+        return std::make_shared<Date>();
+    }
+
+    void Date::Update()
+    {
+        auto const now = std::chrono::system_clock::now();
+        auto const min = std::chrono::floor<std::chrono::minutes>(now);
+
+        if(last_time != min)
+        {
+            setDirty();
+            last_time = min;
+        }
+    }
+
+    void Date::Render(render::RenderTarget& rt)
+    {
+        std::time_t t = std::chrono::system_clock::to_time_t(last_time);
+
+        auto const& size = getSize();
+        Rect draw{0, 0, size.x, size.y};
+
+        auto text = fmt::format("{:%d.%m.%Y}", fmt::localtime(t));
+
+        auto font = font::GetFont("Fira Code");
+
+        auto font_size = font->getOptimalSize(text, draw);
+
+        rt.setInvert(true);
+        rt.DrawText(draw,
+                    text,
+                    *font,
+                    font_size,
+                    AlignHorizontal::CENTER,
+                    AlignVertical::CENTER);
+        rt.setInvert(false);
+
+        setClear();
+    }
+
+} // namespace frame::widgets

frame/src/widgets/clock/Date.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "../Widget.hpp"
+#include "../WidgetRegistry.hpp"
+
+#include <chrono>
+
+namespace frame::widgets
+{
+    class Date : public Widget
+    {
+        using Time = std::chrono::time_point<std::chrono::system_clock>;
+
+        Time last_time;
+
+    public:
+        static Widget::shared_ptr Create();
+
+        void Update() override;
+        void Render(render::RenderTarget& rt) override;
+    };
+} // namespace frame::widgets

frame/src/widgets/clock/Digital.cpp

@@ -0,0 +1,60 @@
+#include "Digital.hpp"
+
+REGISTER_WIDGET(frame::widgets::DigitalClock, "DigitalClock");
+
+#include "../../font/FontRegistry.hpp"
+
+#include <ctime>
+#include <fmt/chrono.h>
+#include <fmt/format.h>
+
+namespace frame::widgets
+{
+
+    Widget::shared_ptr DigitalClock::Create()
+    {
+        return std::make_shared<DigitalClock>();
+    }
+
+    void DigitalClock::Update()
+    {
+        auto const now = std::chrono::system_clock::now();
+        auto const min = std::chrono::floor<std::chrono::minutes>(now);
+
+        if(last_time != min)
+        {
+            setDirty();
+            last_time = min;
+        }
+    }
+
+    void DigitalClock::Render(render::RenderTarget& rt)
+    {
+        std::time_t t = std::chrono::system_clock::to_time_t(last_time);
+        auto c_time   = std::localtime(&t);
+
+        auto const& size = getSize();
+        Rect draw{0, 0, size.x, size.y};
+
+        auto text =
+            fmt::format("{:0>2}:{:0>2}", c_time->tm_hour, c_time->tm_min);
+
+        auto font = font::GetFont("Fira Code");
+
+        auto font_size = font->getOptimalSize(text, draw);
+
+        rt.setInvert(true);
+
+        rt.DrawText(draw,
+                    text,
+                    *font,
+                    font_size,
+                    AlignHorizontal::CENTER,
+                    AlignVertical::CENTER);
+
+        rt.setInvert(false);
+
+        setClear();
+    }
+
+} // namespace frame::widgets

frame/src/widgets/clock/Digital.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <chrono>
+
+#include "../Widget.hpp"
+#include "../WidgetRegistry.hpp"
+
+namespace frame::widgets
+{
+
+    class DigitalClock : public Widget
+    {
+        using Time = std::chrono::time_point<std::chrono::system_clock>;
+
+        Time last_time;
+
+    public:
+        static Widget::shared_ptr Create();
+
+        void Update() override;
+        void Render(render::RenderTarget& rt) override;
+    };
+
+} // namespace frame::widgets

vcpkg.json

@@ -1,7 +1,7 @@
 {
   "name": "frame",
   "version": "1.0",
-  "dependencies": ["fmt"],
+  "dependencies": ["fmt", "nlohmann-json"],
   "features": {
     "virtual": {
       "description": "Build Virtual Display",