some pdf contents and font bold are lost in the converted jpg

[tsiank]

the font bold are lost in the converted jpg, I check your source code and find fontStyleRegex
var fontStyleRegex = Regex.Match(fontname, @"[-,][\w\s]+$");
in PdfToImageConverter.cs can not match font style in my pdf that sent to you via email, by using console.writeline , the output fontname is "AAAAAA+ArialBold" , so I added "+" to fontStyleRegex :Regex.Match(fontname, @"[+-,][\w\s]+$") and the converted jpg's fontstyle are right.

But the words' frame is lost in the converted jpg, I cannot find where the bug is.