解决图像编辑后丢失dpi

app/scanner/mainwindow.cpp

@@ -3423,6 +3423,10 @@ void MainWindow::on_act_imageEdit_triggered()
         return;
     }
 
+    HGUInt xDpi = 0;
+    HGUInt yDpi = 0;
+    HGBase_GetImageDpi(img, &xDpi, &yDpi);
+
     HGImageInfo info;
     HGBase_GetImageInfo(img, &info);
 
@@ -3473,6 +3477,7 @@ void MainWindow::on_act_imageEdit_triggered()
             HGBase_CreateImageWithData((HGByte *)image.bits(), &info, &img);
             if (nullptr != img)
             {
+                HGBase_SetImageDpi(img, xDpi, yDpi);
                 m_view->addImage(img);
                 HGBase_DestroyImage(img);
                 m_modify = true;