--- pdfium.orig/public/fpdf_edit.h
+++ pdfium/public/fpdf_edit.h
@@ -1627,6 +1627,11 @@
 FPDFFont_GetGlyphIndexFromCharCode(FPDF_FONT font, uint32_t charcode);
 
 // Experimental API.
+// Get FontDictObjNum of the PDF character code
+FPDF_EXPORT int FPDF_CALLCONV
+FPDFFont_GetFontDictObjNum(FPDF_FONT font);
+
+// Experimental API.
 // Get number of segments inside glyphpath.
 //
 // glyphpath - handle to a glyph path.
--- pdfium.orig/fpdfsdk/fpdf_edittext.cpp
+++ pdfium/fpdfsdk/fpdf_edittext.cpp
@@ -1173,6 +1173,15 @@
   return FPDFGlyphPathFromCFXPath(pPath);
 }
 
+FPDF_EXPORT int FPDF_CALLCONV
+FPDFFont_GetFontDictObjNum(FPDF_FONT font) {
+  auto* pFont = CPDFFontFromFPDFFont(font);
+  if (!pFont)
+    return -1;
+
+  return pFont->GetFontDictObjNum();
+}
+
 FPDF_EXPORT uint32_t FPDF_CALLCONV
 FPDFFont_GetGlyphIndexFromCharCode(FPDF_FONT font, uint32_t char_code) {
   auto* pFont = CPDFFontFromFPDFFont(font);