feat(渲染): 添加虚拟分辨率支持并重构相机系统

实现虚拟分辨率渲染系统，支持不同缩放模式
重构相机控制器以使用虚拟分辨率计算可见区域
移除硬编码的屏幕尺寸，改为动态获取
添加分辨率状态管理及相关工具函数
更新窗口和渲染器以处理分辨率变化

Frostbite2D/include/frostbite2D/graphics/renderer.h

@@ -1,11 +1,12 @@
 #pragma once
 
-#include <frostbite2D/graphics/types.h>
-#include <frostbite2D/graphics/texture.h>
-#include <frostbite2D/graphics/shader.h>
-#include <frostbite2D/graphics/shader_manager.h>
 #include <frostbite2D/graphics/batch.h>
 #include <frostbite2D/graphics/camera.h>
+#include <frostbite2D/graphics/render_resolution.h>
+#include <frostbite2D/graphics/shader.h>
+#include <frostbite2D/graphics/shader_manager.h>
+#include <frostbite2D/graphics/texture.h>
+#include <frostbite2D/graphics/types.h>
 #include <string>
 
 namespace frostbite2D {
@@ -13,55 +14,71 @@ namespace frostbite2D {
 class Renderer {
 public:
   static Renderer& get();
-  
+
   bool init();
   void shutdown();
-  
+
   void beginFrame();
   void endFrame();
   void flush();
-  
+
   void setViewport(int x, int y, int width, int height);
+  void setWindowSize(int width, int height, float contentScaleX = 1.0f,
+                     float contentScaleY = 1.0f);
+  void setVirtualResolutionEnabled(bool enabled);
+  void setVirtualResolution(int width, int height);
+  void setResolutionScaleMode(ResolutionScaleMode mode);
   void setClearColor(float r, float g, float b, float a = 1.0f);
   void setClearColor(const Color& color);
   void clear(uint32_t flags);
-  
+
   void setCamera(Camera* camera);
   Camera* getCamera() { return camera_; }
-  
-  void drawQuad(const Vec2& pos, const Size& size, float cr = 1.0f, float cg = 1.0f,
-                float cb = 1.0f, float ca = 1.0f);
+  int getVirtualWidth() const;
+  int getVirtualHeight() const;
+  Rect getViewportRect() const;
+  const RenderResolutionState& getResolutionState() const {
+    return resolutionState_;
+  }
+  Vec2 screenToVirtual(const Vec2& screenPos) const;
+  Vec2 virtualToScreen(const Vec2& virtualPos) const;
+
+  void drawQuad(const Vec2& pos, const Size& size, float cr = 1.0f,
+                float cg = 1.0f, float cb = 1.0f, float ca = 1.0f);
   void drawQuad(const Vec2& pos, const Size& size, Ptr<Texture> texture);
   void drawQuad(const Rect& rect, const Color& color);
-  
+
   void drawSprite(const Vec2& pos, const Size& size, Ptr<Texture> texture);
-  void drawSprite(const Vec2& pos, const Rect& srcRect, const Vec2& texSize, 
-                  Ptr<Texture> texture, const Color& color = Color(1, 1, 1, 1));
+  void drawSprite(const Vec2& pos, const Rect& srcRect, const Vec2& texSize,
+                  Ptr<Texture> texture,
+                  const Color& color = Color(1, 1, 1, 1));
   void setupBlendMode(BlendMode mode);
-  
+
   ShaderManager& getShaderManager() { return shaderManager_; }
   Batch& getBatch() { return batch_; }
-  
+
 private:
   Renderer();
-  // ~Renderer() 在 shutdown() 中手动调用销毁
-  
+
   void updateUniforms();
-  
+  void recalculateResolutionState();
+  void syncCameraViewport();
+
   ShaderManager shaderManager_;
   Batch batch_;
   Camera* camera_ = nullptr;
-  
+
   uint32_t clearColor_[4] = {0, 0, 0, 255};
-  int viewportX_ = 0;
-  int viewportY_ = 0;
-  int viewportWidth_ = 1280;
-  int viewportHeight_ = 720;
-  
+  bool useVirtualResolution_ = false;
+  int virtualWidth_ = 1280;
+  int virtualHeight_ = 720;
+  ResolutionScaleMode resolutionMode_ = ResolutionScaleMode::Fit;
+  RenderResolutionState resolutionState_;
+
   bool initialized_ = false;
-  
+
   Renderer(const Renderer&) = delete;
   Renderer& operator=(const Renderer&) = delete;
 };
 
-}
+} // namespace frostbite2D