From a59aab8a31b9b9326f063e5f285831527e3327d8 Mon Sep 17 00:00:00 2001
From: Thomas Bernard <miniupnp@free.fr>
Date: Sat, 29 Jun 2019 10:25:17 +0200
Subject: [PATCH] Fix loading of Grayscale + Alpha PNG's

---
 src/fileformats.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/fileformats.c b/src/fileformats.c
index d91bcbaa..0ce921e4 100644
--- a/src/fileformats.c
+++ b/src/fileformats.c
@@ -6527,7 +6527,8 @@ void Load_PNG_Sub(T_IO_Context * context, FILE * file, const char * memory_buffe
         switch (color_type)
         {
           case PNG_COLOR_TYPE_GRAY_ALPHA:
-            bpp = bit_depth * 2;
+            //bpp = bit_depth * 2;
+            bpp = bit_depth;  // no more than 8bpp or else we enable true color picture loading
             break;
           case PNG_COLOR_TYPE_RGB:
             bpp = bit_depth * 3;