Qt图片格式转换

#include <QtCore/QCoreApplication>#include <QImage>#include <qimagewriter.h>#include <string>int main(int argc, char *argv[]){   QCoreApplication a(argc, argv);   std::string strFileName( "C:/Users/acer/Desktop/timg.bmp" );   std::string strTempFileName(  "C:/Users/acer/Desktop/timg.jpg" );   QImageWriter imageWriter;   imageWriter.setFormat("bmp");   imageWriter.setFileName( QString::fromUtf8(strFileName.c_str()) );   if( imageWriter.canWrite() )   {      imageWriter.write( QImage(strTempFileName.c_str(), "jpg") );   }   return a.exec();}