From b7fece51736977e7d84aca30ecce7f6b3a1251f2 Mon Sep 17 00:00:00 2001
From: xuri <xuri.me@gmail.com>
Date: Tue, 6 Jul 2021 00:31:04 +0800
Subject: Support concurrency add picture

---
 drawing.go | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'drawing.go')

diff --git a/drawing.go b/drawing.go
index 181bb43..86d5ca6 100644
--- a/drawing.go
+++ b/drawing.go
@@ -1173,8 +1173,13 @@ func (f *File) drawingParser(path string) (*xlsxWsDr, int) {
 		}
 		f.Drawings.Store(path, &content)
 	}
-	wsDr, _ := f.Drawings.Load(path)
-	return wsDr.(*xlsxWsDr), len(wsDr.(*xlsxWsDr).OneCellAnchor) + len(wsDr.(*xlsxWsDr).TwoCellAnchor) + 2
+	var wsDr *xlsxWsDr
+	if drawing, ok := f.Drawings.Load(path); ok && drawing != nil {
+		wsDr = drawing.(*xlsxWsDr)
+	}
+	wsDr.Lock()
+	defer wsDr.Unlock()
+	return wsDr, len(wsDr.OneCellAnchor) + len(wsDr.TwoCellAnchor) + 2
 }
 
 // addDrawingChart provides a function to add chart graphic frame by given
-- 
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