From 1be84ed1d4fbe44387222995a124a4f84ee55210 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor@ghostscript.com>
Date: Thu, 11 Nov 2004 07:52:33 +0100
Subject: fitz tree resource reference counting

---
 tree/image.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

(limited to 'tree/image.c')

diff --git a/tree/image.c b/tree/image.c
index 16a1c817..c448f41a 100644
--- a/tree/image.c
+++ b/tree/image.c
@@ -1,9 +1,20 @@
 #include <fitz.h>
 
-void fz_dropimage(fz_image *image)
+fz_image *
+fz_keepimage(fz_image *image)
 {
-	if (image->drop)
-		image->drop(image);
-	fz_free(image);
+	image->nrefs ++;
+	return image;
+}
+
+void
+fz_dropimage(fz_image *image)
+{
+	if (--image->nrefs == 0)
+	{
+		if (image->drop)
+			image->drop(image);
+		fz_free(image);
+	}
 }
 
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