This closes #652, new SetColWidth API, support set column width in stream writing mode, and export error message

1 files changed, 2 insertions, 3 deletions

diff --git a/picture.go b/picture.go
index de7e0f8..92e0106 100644
--- a/picture.go
+++ b/picture.go
@@ -15,7 +15,6 @@ import (
 	"bytes"
 	"encoding/json"
 	"encoding/xml"
-	"errors"
 	"fmt"
 	"image"
 	"io"
@@ -93,7 +92,7 @@ func (f *File) AddPicture(sheet, cell, picture, format string) error {
 	}
 	ext, ok := supportImageTypes[path.Ext(picture)]
 	if !ok {
-		return errors.New("unsupported image extension")
+		return ErrImgExt
 	}
 	file, _ := ioutil.ReadFile(picture)
 	_, name := filepath.Split(picture)
@@ -134,7 +133,7 @@ func (f *File) AddPictureFromBytes(sheet, cell, format, name, extension string,
 	var hyperlinkType string
 	ext, ok := supportImageTypes[extension]
 	if !ok {
-		return errors.New("unsupported image extension")
+		return ErrImgExt
 	}
 	formatSet, err := parseFormatPictureSet(format)
 	if err != nil {