1 files changed, 11 insertions, 0 deletions
diff --git a/public/fpdf_annot.h b/public/fpdf_annot.h
index 6a89ff9384..429a3f7541 100644
--- a/public/fpdf_annot.h
+++ b/public/fpdf_annot.h
@@ -134,6 +134,17 @@ FPDF_EXPORT FPDF_ANNOTATION FPDF_CALLCONV FPDFPage_GetAnnot(FPDF_PAGE page,
                                                             int index);
 
 // Experimental API.
+// Get the index of |annot| in |page|. This is the opposite of
+// FPDFPage_GetAnnot().
+//
+//   page  - handle to the page that the annotation is on.
+//   annot - handle to an annotation.
+//
+// Returns the index of |annot|, or -1 on failure.
+FPDF_EXPORT int FPDF_CALLCONV FPDFPage_GetAnnotIndex(FPDF_PAGE page,
+                                                     FPDF_ANNOTATION annot);
+
+// Experimental API.
 // Close an annotation. Must be called when the annotation returned by
 // FPDFPage_CreateAnnot() or FPDFPage_GetAnnot() is no longer needed. This
 // function does not remove the annotation from the document.