fix(图片渲染): 修复一个图片渲染的回归问题

ofdgo_reader.go

@@ -38,6 +38,7 @@ type Reader struct {
 	Stamps                    map[string][]Stamp
 	Annots                    map[string][]Annotation
 	fileIndex                 map[string]*zip.File
+	fileIndexFold             map[string]*zip.File
 }
 
 // Close 关闭阅读器
@@ -53,9 +54,14 @@ func (r *Reader) Close() error {
 // 返回: error 错误信息
 func (r *Reader) initRoot() error {
 	r.fileIndex = make(map[string]*zip.File)
+	r.fileIndexFold = make(map[string]*zip.File)
 	for _, f := range r.Zip.File {
 		name := cleanPackagePath(f.Name)
 		r.fileIndex[name] = f
+		fold := strings.ToLower(name)
+		if _, ok := r.fileIndexFold[fold]; !ok {
+			r.fileIndexFold[fold] = f
+		}
 	}
 	data, err := r.readFile("OFD.xml")
 	if err != nil {
@@ -111,6 +117,9 @@ func (r *Reader) packageFile(name string) (*zip.File, bool) {
 	if f, ok := r.fileIndex[name]; ok {
 		return f, true
 	}
+	if f, ok := r.fileIndexFold[strings.ToLower(name)]; ok {
+		return f, true
+	}
 	return nil, false
 }