From 2690782292a7ffa4b4405aec1818253a64522baa Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Wed, 10 Feb 2021 13:36:11 -0800
Subject: [PATCH] pngdec: check version before using png_get_chunk_malloc_max

png_get_chunk_malloc_max / png_set_chunk_malloc_max were added in 1.4.1.

Bug: webp:505, webp:497
Change-Id: Id4e0643a7734563fec7779f7943ec760da8d276d
---
 imageio/pngdec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/imageio/pngdec.c b/imageio/pngdec.c
index e0b152ed..44d0d1a1 100644
--- a/imageio/pngdec.c
+++ b/imageio/pngdec.c
@@ -259,11 +259,14 @@ int ReadPNG(const uint8_t* const data, size_t data_size,
     goto End;
   }
 
+#if LOCAL_PNG_PREREQ(1,5) || \
+    (LOCAL_PNG_PREREQ(1,4) && PNG_LIBPNG_VER_RELEASE >= 1)
   // If it looks like the bitstream is going to need more memory than libpng's
   // internal limit (default: 8M), try to (reasonably) raise it.
   if (data_size > png_get_chunk_malloc_max(png) && data_size < (1u << 24)) {
     png_set_chunk_malloc_max(png, data_size);
   }
+#endif
 
   info = png_create_info_struct(png);
   if (info == NULL) goto Error;