添加图层剪切功能

src/component/Canvas/CanvasEditor/managers/LayerManager.js

@@ -3200,6 +3200,49 @@ export class LayerManager {
     }
   }
 
+  /**
+   * 栅格化图层并返回Base64编码
+   * @param {string} layerId 图层ID，默认使用当前活动图层
+   * @returns {Promise<string|null>} Base64编码的图像字符串，失败时返回null
+   */
+  async getLayerToBase64(layerId = null) {
+    const targetLayerId = layerId || this.activeLayerId.value;
+    if (!targetLayerId) {
+      console.warn(this.t("没有指定要栅格化的图层"));
+      return null;
+    }
+
+    // 查找目标图层
+    // const targetLayer = this.getLayerById(targetLayerId);
+    const { layer: targetLayer } = findLayerRecursively(
+      this.layers.value,
+      targetLayerId
+    );
+
+    if (!targetLayer) {
+      console.error(this.t("图层不存在", { layerId: targetLayerId }));
+      return null;
+    }
+
+    // 直接创建和执行导出命令
+    const command = new ExportLayerToImageCommand({
+      canvas: this.canvas,
+      layers: this.layers,
+      layerId: targetLayerId,
+      activeLayerId: this.activeLayerId,
+      layerManager: this,
+    });
+
+    command.undoable = false; // 导出操作通常不需要撤销
+
+    // 执行命令
+	const result = await command.execute(false);
+	if (result) {
+	console.log(`✅ 成功导出图层: ${targetLayer.name}`);
+	}
+	return result;
+  }
+
   /**
    * 为组图层的活动选择组设置遮罩移动同步（修复版）
    * @param {fabric.ActiveSelection} activeSelection 活动选择组