From 237f4e0887eff2f22d5542dfed33fa94a8c7b0ff Mon Sep 17 00:00:00 2001
From: Ryan <ryanorz@126.com>
Date: Tue, 21 Feb 2017 16:11:53 +0800
Subject: [PATCH] Fix(poppler-utils): pdfimages extract too many same pictures
 with the same object number.

---
 utils/ImageOutputDev.cc | 8 ++++++++
 utils/ImageOutputDev.h  | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/utils/ImageOutputDev.cc b/utils/ImageOutputDev.cc
index 5de51ad..26bf95b 100644
--- a/utils/ImageOutputDev.cc
+++ b/utils/ImageOutputDev.cc
@@ -442,6 +442,14 @@ void ImageOutputDev::writeImageFile(ImgWriter *writer, ImageFormat format, const
 void ImageOutputDev::writeImage(GfxState *state, Object *ref, Stream *str,
 				int width, int height,
 				GfxImageColorMap *colorMap, GBool inlineImg) {
+  if (ref->isRef()) {
+    const Ref imageRef = ref->getRef();
+    if (refNums.find(imageRef.num) != refNums.end())
+      return;
+    else
+      refNums.insert(imageRef.num);
+  }
+
   ImageFormat format;
 
   if (dumpJPEG && str->getKind() == strDCT &&
diff --git a/utils/ImageOutputDev.h b/utils/ImageOutputDev.h
index a694bbc..89c67ac 100644
--- a/utils/ImageOutputDev.h
+++ b/utils/ImageOutputDev.h
@@ -35,6 +35,7 @@
 #endif
 
 #include <stdio.h>
+#include <set>
 #include "goo/gtypes.h"
 #include "goo/ImgWriter.h"
 #include "OutputDev.h"
@@ -173,6 +174,7 @@ private:
   int pageNum;			// current page number
   int imgNum;			// current image number
   GBool ok;			// set up ok?
+  std::set<int> refNums;
 };
 
 #endif
-- 
2.10.2