nixpkgs/pkgs/tools/graphics/jbig2enc/53ce5fe7e73d7ed95c9e12b52dd4984723f865fa.patch

From 53ce5fe7e73d7ed95c9e12b52dd4984723f865fa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zdenko=20Podobn=C3=BD?= <zdenop@gmail.com>
Date: Sun, 6 Apr 2014 21:25:27 +0200
Subject: [PATCH] fix build with leptonica 1.70

---
 configure.ac |  1 +
 src/jbig2.cc | 13 +++++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index fe37c22..753a607 100644
--- a/configure.ac
+++ b/configure.ac
@@ -55,6 +55,7 @@ AC_CHECK_LIB([lept], [findFileFormatStream], [], [
			echo "Error! Leptonica not detected."
			exit -1
			])
+AC_CHECK_FUNCS(expandBinaryPower2Low,,)
 # test for function - it should detect leptonica dependecies

 # Check for possible dependancies of leptonica.
diff --git a/src/jbig2.cc b/src/jbig2.cc
index e10f042..515c1ef 100644
--- a/src/jbig2.cc
+++ b/src/jbig2.cc
@@ -130,11 +130,16 @@ segment_image(PIX *pixb, PIX *piximg) {
   // input color image, so we have to do it this way...
   // is there a better way?
   // PIX *pixd = pixExpandBinary(pixd4, 4);
-  PIX *pixd = pixCreate(piximg->w, piximg->h, 1);
-  pixCopyResolution(pixd, piximg);
-  if (verbose) pixInfo(pixd, "mask image: ");
-  expandBinaryPower2Low(pixd->data, pixd->w, pixd->h, pixd->wpl,
+  PIX *pixd;
+#ifdef HAVE_EXPANDBINARYPOWER2LOW
+    pixd = pixCreate(piximg->w, piximg->h, 1);
+    pixCopyResolution(pixd, piximg);
+    expandBinaryPower2Low(pixd->data, pixd->w, pixd->h, pixd->wpl,
                         pixd4->data, pixd4->w, pixd4->h, pixd4->wpl, 4);
+#else
+    pixd = pixExpandBinaryPower2(pixd4, 4);
+#endif
+  if (verbose) pixInfo(pixd, "mask image: ");

   pixDestroy(&pixd4);
   pixDestroy(&pixsf4);