From 08fe9f7e0fedc400b46b1f992089355ebd1056d9 Mon Sep 17 00:00:00 2001
From: Daniel Beer <dlbeer@gmail.com>
Date: Tue, 6 Sep 2016 08:08:58 +1200
Subject: [PATCH] Fall back to set_strip() on older libpng versions.

Latest Debian release right now packages only 1.2.50.
---
 tests/dbgutil.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tests/dbgutil.c b/tests/dbgutil.c
index ca61644..6dd492e 100644
--- a/tests/dbgutil.c
+++ b/tests/dbgutil.c
@@ -234,7 +234,11 @@ int load_png(struct quirc *q, const char *filename)
 		png_set_tRNS_to_alpha(png_ptr);
 
 	if (bit_depth == 16)
+#if PNG_LIBPNG_VER >= 10504
 		png_set_scale_16(png_ptr);
+#else
+		png_set_strip_16(png_ptr);
+#endif
 
 	if ((trns) || color_type & PNG_COLOR_MASK_ALPHA)
 		png_set_strip_alpha(png_ptr);