From 6d42fa4223e1191f12c6d4eb6bbcce7e06e48cf7 Mon Sep 17 00:00:00 2001
From: Jason Wang <jason.ruonan.wang@gmail.com>
Date: Tue, 19 Oct 2021 14:37:16 -0400
Subject: [PATCH] fix png

---
 source/adios2/operator/compress/CompressPNG.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/source/adios2/operator/compress/CompressPNG.cpp b/source/adios2/operator/compress/CompressPNG.cpp
index 0308c33a5c..fcb8eaf5e2 100644
--- a/source/adios2/operator/compress/CompressPNG.cpp
+++ b/source/adios2/operator/compress/CompressPNG.cpp
@@ -188,6 +188,8 @@ size_t CompressPNG::Compress(const char *dataIn, const Dims &blockStart,
     PutParameter(bufferOut, paramOffset,
                  static_cast<uint8_t>(PNG_LIBPNG_VER_RELEASE));
 
+    const size_t sizeIn =
+        helper::GetTotalSize(blockCount, helper::GetDataTypeSize(varType));
     if (sizeIn < destInfo.Offset)
     {
         std::cerr