Add ImGui Font class and dedicated Font Manager

scwx-qt/scwx-qt.cmake

@@ -74,7 +74,8 @@ set(SRC_GL_DRAW source/scwx/qt/gl/draw/draw_item.cpp
                 source/scwx/qt/gl/draw/placefile_text.cpp
                 source/scwx/qt/gl/draw/placefile_triangles.cpp
                 source/scwx/qt/gl/draw/rectangle.cpp)
-set(HDR_MANAGER source/scwx/qt/manager/placefile_manager.hpp
+set(HDR_MANAGER source/scwx/qt/manager/font_manager.hpp
+                source/scwx/qt/manager/placefile_manager.hpp
                 source/scwx/qt/manager/radar_product_manager.hpp
                 source/scwx/qt/manager/radar_product_manager_notifier.hpp
                 source/scwx/qt/manager/resource_manager.hpp
@@ -82,7 +83,8 @@ set(HDR_MANAGER source/scwx/qt/manager/placefile_manager.hpp
                 source/scwx/qt/manager/text_event_manager.hpp
                 source/scwx/qt/manager/timeline_manager.hpp
                 source/scwx/qt/manager/update_manager.hpp)
-set(SRC_MANAGER source/scwx/qt/manager/placefile_manager.cpp
+set(SRC_MANAGER source/scwx/qt/manager/font_manager.cpp
+                source/scwx/qt/manager/placefile_manager.cpp
                 source/scwx/qt/manager/radar_product_manager.cpp
                 source/scwx/qt/manager/radar_product_manager_notifier.cpp
                 source/scwx/qt/manager/resource_manager.cpp
@@ -158,6 +160,7 @@ set(SRC_SETTINGS source/scwx/qt/settings/general_settings.cpp
 set(HDR_TYPES source/scwx/qt/types/alert_types.hpp
               source/scwx/qt/types/font_types.hpp
               source/scwx/qt/types/github_types.hpp
+              source/scwx/qt/types/imgui_font.hpp
               source/scwx/qt/types/map_types.hpp
               source/scwx/qt/types/qt_types.hpp
               source/scwx/qt/types/radar_product_record.hpp
@@ -165,6 +168,7 @@ set(HDR_TYPES source/scwx/qt/types/alert_types.hpp
               source/scwx/qt/types/text_types.hpp)
 set(SRC_TYPES source/scwx/qt/types/alert_types.cpp
               source/scwx/qt/types/github_types.cpp
+              source/scwx/qt/types/imgui_font.cpp
               source/scwx/qt/types/map_types.cpp
               source/scwx/qt/types/radar_product_record.cpp
               source/scwx/qt/types/text_event_key.cpp

scwx-qt/source/scwx/qt/manager/font_manager.cpp

@@ -0,0 +1,45 @@
+#include <scwx/qt/manager/font_manager.hpp>
+#include <scwx/util/logger.hpp>
+
+namespace scwx
+{
+namespace qt
+{
+namespace manager
+{
+
+static const std::string logPrefix_ = "scwx::qt::manager::font_manager";
+static const auto        logger_    = scwx::util::Logger::Create(logPrefix_);
+
+class FontManager::Impl
+{
+public:
+   explicit Impl() {}
+   ~Impl() {}
+};
+
+FontManager::FontManager() : p(std::make_unique<Impl>()) {}
+
+FontManager::~FontManager() {};
+
+std::shared_ptr<FontManager> FontManager::Instance()
+{
+   static std::weak_ptr<FontManager> fontManagerReference_ {};
+   static std::mutex                 instanceMutex_ {};
+
+   std::unique_lock lock(instanceMutex_);
+
+   std::shared_ptr<FontManager> fontManager = fontManagerReference_.lock();
+
+   if (fontManager == nullptr)
+   {
+      fontManager           = std::make_shared<FontManager>();
+      fontManagerReference_ = fontManager;
+   }
+
+   return fontManager;
+}
+
+} // namespace manager
+} // namespace qt
+} // namespace scwx

scwx-qt/source/scwx/qt/manager/font_manager.hpp

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <scwx/qt/types/imgui_font.hpp>
+
+#include <QObject>
+
+namespace scwx
+{
+namespace qt
+{
+namespace manager
+{
+
+class FontManager : public QObject
+{
+   Q_OBJECT
+
+public:
+   explicit FontManager();
+   ~FontManager();
+
+   static std::shared_ptr<FontManager> Instance();
+
+private:
+   class Impl;
+   std::unique_ptr<Impl> p;
+};
+
+} // namespace manager
+} // namespace qt
+} // namespace scwx

scwx-qt/source/scwx/qt/types/imgui_font.cpp

@@ -0,0 +1,83 @@
+// Disable strncpy warning
+#define _CRT_SECURE_NO_WARNINGS
+
+#include <scwx/qt/types/imgui_font.hpp>
+#include <scwx/qt/model/imgui_context_model.hpp>
+#include <scwx/util/logger.hpp>
+
+#include <algorithm>
+#include <limits>
+
+#include <imgui.h>
+
+namespace scwx
+{
+namespace qt
+{
+namespace types
+{
+
+static const std::string logPrefix_ = "scwx::qt::types::imgui_font";
+static const auto        logger_    = scwx::util::Logger::Create(logPrefix_);
+
+class ImGuiFont::Impl
+{
+public:
+   explicit Impl(const std::string&    fontName,
+                 const std::string&    fontData,
+                 units::pixels<double> size) :
+       fontName_ {fontName}, size_ {size}
+   {
+      CreateImGuiFont(fontData);
+   }
+
+   ~Impl() {}
+
+   void CreateImGuiFont(const std::string& fontData);
+
+   const std::string           fontName_;
+   const units::pixels<double> size_;
+
+   ImFont* imFont_ {nullptr};
+};
+
+ImGuiFont::ImGuiFont(const std::string&    fontName,
+                     const std::string&    fontData,
+                     units::pixels<double> size) :
+    p(std::make_unique<Impl>(fontName, fontData, size))
+{
+}
+ImGuiFont::~ImGuiFont() = default;
+
+void ImGuiFont::Impl::CreateImGuiFont(const std::string& fontData)
+{
+   logger_->debug("Creating Font: {}", fontName_);
+
+   ImFontAtlas* fontAtlas = model::ImGuiContextModel::Instance().font_atlas();
+   ImFontConfig fontConfig {};
+
+   const float sizePixels = static_cast<float>(size_.value());
+
+   // Do not transfer ownership of font data to ImGui, makes const_cast safe
+   fontConfig.FontDataOwnedByAtlas = false;
+
+   // Assign name to font
+   strncpy(fontConfig.Name, fontName_.c_str(), sizeof(fontConfig.Name) - 1);
+   fontConfig.Name[sizeof(fontConfig.Name) - 1] = 0;
+
+   imFont_ = fontAtlas->AddFontFromMemoryTTF(
+      const_cast<void*>(static_cast<const void*>(fontData.c_str())),
+      static_cast<int>(std::clamp<std::size_t>(
+         fontData.size(), 0, std::numeric_limits<int>::max())),
+      sizePixels,
+      &fontConfig);
+}
+
+ImFont* ImGuiFont::font()
+{
+   return p->imFont_;
+}
+
+} // namespace types
+} // namespace qt
+} // namespace scwx

scwx-qt/source/scwx/qt/types/imgui_font.hpp

@@ -0,0 +1,40 @@
+#pragma once
+
+#include <memory>
+#include <string>
+
+#include <scwx/qt/types/font_types.hpp>
+
+struct ImFont;
+
+namespace scwx
+{
+namespace qt
+{
+namespace types
+{
+
+class ImGuiFont
+{
+public:
+   explicit ImGuiFont(const std::string&    fontName,
+                      const std::string&    fontData,
+                      units::pixels<double> size);
+   ~ImGuiFont();
+
+   ImGuiFont(const ImGuiFont&)            = delete;
+   ImGuiFont& operator=(const ImGuiFont&) = delete;
+
+   ImGuiFont(ImGuiFont&&)            = delete;
+   ImGuiFont& operator=(ImGuiFont&&) = delete;
+
+   ImFont* font();
+
+private:
+   class Impl;
+   std::unique_ptr<Impl> p;
+};
+
+} // namespace types
+} // namespace qt
+} // namespace scwx