From a139d2b36da39fbfb018ef6973e9316a64a4ca6c Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Fri, 1 Jan 2021 07:31:54 -0500
Subject: Add several methods for working with form XObjects (fixes #436)

Make some more methods in QPDFPageObjectHelper work with form
XObjects, provide forEach methods to walk through nested form
XObjects, possibly recursively. This should make it easier to work
with form XObjects from user code.
---
 libqpdf/QPDFObjectHandle.cc | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'libqpdf/QPDFObjectHandle.cc')

diff --git a/libqpdf/QPDFObjectHandle.cc b/libqpdf/QPDFObjectHandle.cc
index 180ccfa3..add0b14d 100644
--- a/libqpdf/QPDFObjectHandle.cc
+++ b/libqpdf/QPDFObjectHandle.cc
@@ -2948,6 +2948,21 @@ QPDFObjectHandle::isFormXObject()
             ("/Form" == dict.getKey("/Subtype").getName()));
 }
 
+bool
+QPDFObjectHandle::isImage(bool exclude_imagemask)
+{
+    if (! this->isStream())
+    {
+        return false;
+    }
+    QPDFObjectHandle dict = this->getDict();
+    return (dict.hasKey("/Subtype") &&
+            (dict.getKey("/Subtype").getName() == "/Image") &&
+            ((! exclude_imagemask) ||
+             (! (dict.getKey("/ImageMask").isBool() &&
+                 dict.getKey("/ImageMask").getBoolValue()))));
+}
+
 void
 QPDFObjectHandle::assertPageObject()
 {
-- 
cgit v1.2.3-54-g00ecf