feat(sprite_renderer): 自动调整节点尺寸以匹配纹理大小

在 SpriteRenderer 的 onAttach 和 setTexture 方法中添加逻辑，当节点尺寸为默认值 (100x100) 且纹理有效时，自动将节点尺寸设置为纹理的宽高。同时移除示例中多余的纹理加载状态检查和调试输出，简化代码逻辑。

examples/image_display_demo/main.cpp

@@ -14,9 +14,6 @@ public:
 
   void update(float dt) override {
     Scene::update(dt);
-    if (textureLoaded_) {
-      return;
-    }
     auto *rhiModule = RHIModule::get();
     if (!rhiModule || !rhiModule->getDevice()) {
       return;
@@ -28,11 +25,7 @@ public:
     auto texture = assets->load<Texture>("assets/test.png");
     if (texture.isValid()) {
       spriteRenderer_->setTexture(texture);
-      printf("图片加载成功: assets/test.png\n");
-    } else {
-      printf("图片加载失败: assets/test.png\n");
     }
-    textureLoaded_ = true;
   }
 
 private:
@@ -40,7 +33,6 @@ private:
     auto cameraNode = makePtr<Node>();
     cameraNode->setName("MainCamera");
     cameraNode->setPosition(0.0f, 0.0f);
-
     auto camera = makePtr<CameraComponent>();
     camera->setOrtho(0.0f, 1280.0f, 720.0f, 0.0f, -1.0f, 1.0f);
     cameraNode->addComponent(camera);
@@ -52,17 +44,12 @@ private:
     auto spriteNode = makePtr<Node>();
     spriteNode->setName("ImageSprite");
     spriteNode->setPosition(640.0f, 360.0f);
-    // spriteNode->setSize(384.0f, 384.0f);
     spriteNode->setAnchor(0.5f, 0.5f);
-    
     spriteRenderer_ = makePtr<SpriteRenderer>();
-    // spriteRenderer_->setColor(Color::White);
     spriteNode->addComponent(spriteRenderer_);
     addChild(spriteNode);
   }
-
   Ptr<SpriteRenderer> spriteRenderer_;
-  bool textureLoaded_ = false;
 };
 
 int main(int argc, char **argv) {

src/scene/components/sprite_renderer.cpp

@@ -1,5 +1,6 @@
 #include <assets/assets_module.h>
 #include <event/events.h>
+#include <renderer/texture.h>
 #include <scene/components/sprite_renderer.h>
 #include <scene/node.h>
 #include <utils/logger.h>
@@ -9,13 +10,51 @@ namespace extra2d {
 SpriteRenderer::SpriteRenderer() {
 }
 
-void SpriteRenderer::onAttach(Node *owner) { Component::onAttach(owner); }
+void SpriteRenderer::onAttach(Node *owner) {
+  Component::onAttach(owner);
+  if (!texture_.isValid() || !owner_) {
+    return;
+  }
+  Vec2 nodeSize = owner_->getSize();
+  if (nodeSize.x != 100.0f || nodeSize.y != 100.0f) {
+    return;
+  }
+  auto *assets = getAssets();
+  if (!assets) {
+    return;
+  }
+  Texture *tex = assets->get(texture_);
+  if (!tex) {
+    return;
+  }
+  owner_->setSize(static_cast<float>(tex->getWidth()),
+                  static_cast<float>(tex->getHeight()));
+}
 
 void SpriteRenderer::setMaterial(Handle<Material> material) {
   material_ = material;
 }
 
-void SpriteRenderer::setTexture(Handle<Texture> texture) { texture_ = texture; }
+void SpriteRenderer::setTexture(Handle<Texture> texture) {
+  texture_ = texture;
+  if (!owner_ || !texture_.isValid()) {
+    return;
+  }
+  Vec2 nodeSize = owner_->getSize();
+  if (nodeSize.x != 100.0f || nodeSize.y != 100.0f) {
+    return;
+  }
+  auto *assets = getAssets();
+  if (!assets) {
+    return;
+  }
+  Texture *tex = assets->get(texture_);
+  if (!tex) {
+    return;
+  }
+  owner_->setSize(static_cast<float>(tex->getWidth()),
+                  static_cast<float>(tex->getHeight()));
+}
 
 void SpriteRenderer::setColor(const Color &color) { color_ = color; }