Use pdfDpi on CPP lib

 # Changelog
 
+## 5.11.1
+
+- Use pdfDpi on CPP lib
+
 ## 5.11.0
 
 - Set Flutter 3.10 as the minimum version

@@ -9,7 +9,7 @@ issue_tracker: https://github.com/DavBfr/dart_pdf/issues
 screenshots:
   - description: 'Printing a document on iOS'
     path: example.png
-version: 5.11.0
+version: 5.11.1
 
 environment:
   sdk: ">=3.0.0 <4.0.0"

@@ -102,12 +102,12 @@ bool PrintJob::printPdf(const std::string& name,
     dm->dmPaperSize = 0;
     if (width > height) {
       dm->dmOrientation = DMORIENT_LANDSCAPE;
-      dm->dmPaperWidth = static_cast<short>(round(height * 254 / 72));
-      dm->dmPaperLength = static_cast<short>(round(width * 254 / 72));
+      dm->dmPaperWidth = static_cast<short>(round(height * 254 / pdfDpi));
+      dm->dmPaperLength = static_cast<short>(round(width * 254 / pdfDpi));
     } else {
       dm->dmOrientation = DMORIENT_PORTRAIT;
-      dm->dmPaperWidth = static_cast<short>(round(width * 254 / 72));
-      dm->dmPaperLength = static_cast<short>(round(height * 254 / 72));
+      dm->dmPaperWidth = static_cast<short>(round(width * 254 / pdfDpi));
+      dm->dmPaperLength = static_cast<short>(round(height * 254 / pdfDpi));
     }
   }