Add TTF support

src/core/GameApplication.cpp

@@ -14,7 +14,10 @@ bool GameApplication::initialize() {
         SDL_Log("SDL初始化失败: %s", SDL_GetError());
         return false;
     }
-
+    if (!TTF_Init()) {
+        SDL_Log("无法初始化 SDL_ttf: %s", SDL_GetError());
+        return false;
+    }
     m_inputManager = std::make_unique<InputManager>();
     m_windowManager = std::make_unique<WindowManager>();
     

src/core/GameApplication.h

@@ -5,7 +5,7 @@
 #include "scenes/base/SceneManager.h"
 #include "input/InputManager.h"
 #include "utils/Config.h"
-
+#include <SDL3_ttf/SDL_ttf.h>
 
 class GameApplication {
 private:

src/graphics/font/FontManager.cpp

@@ -0,0 +1,35 @@
+#include "FontManager.h"
+#include <stdexcept>
+FontManager::FontManager() {
+
+}
+
+FontManager::~FontManager() {
+    for (auto& pair : m_fonts) {
+        TTF_CloseFont(pair.second);
+    }
+    m_fonts.clear();
+}
+
+TTF_Font* FontManager::loadFont(const std::string& fontID, int ptSize) {
+    std::string path = "assets/fonts/" + fontID;
+    std::string key = fontID + std::to_string(ptSize);
+    auto it = m_fonts.find(key);
+    // 检查字体是否已经加载
+    if (it != m_fonts.end()) {
+        return it->second;
+    }
+
+    TTF_Font* font =  TTF_OpenFont(path.c_str(), ptSize);
+    if (!font) {
+        throw std::runtime_error("无法加载字体: " + key);
+    }
+    m_fonts[key] = font;
+    return font;
+}
+
+TTF_Font* FontManager::getFont(const std::string& key) {
+    auto it = m_fonts.find(key);
+    return (it != m_fonts.end()) ? it->second : nullptr;
+}
+

src/graphics/font/FontManager.h

@@ -0,0 +1,20 @@
+#pragma once
+#include <string>
+#include <unordered_map>
+#include <SDL3_ttf/SDL_ttf.h>
+
+class FontManager {
+public:
+    FontManager();
+    ~FontManager();
+
+    // 加载字体（路径 + 字号）
+    // ptSize 为字号
+    TTF_Font* loadFont(const std::string& fontID, int ptSize);
+    
+    // 获取已加载的字体
+    TTF_Font* getFont(const std::string& key);
+private:
+    // 用哈希表存储字体
+    std::unordered_map<std::string, TTF_Font*> m_fonts;
+};

src/main.cpp

@@ -58,5 +58,6 @@ SDL_AppResult SDL_AppIterate(void *appstate) {
 // 4. 应用退出回调（清理资源）
 void SDL_AppQuit(void *appstate, SDL_AppResult result) {
     delete static_cast<GameApplication*>(appstate);
+    TTF_Quit();
     SDL_Quit();
 }