From e7c46ec677c1b3a4b17ebdb41b0131972e187b4a Mon Sep 17 00:00:00 2001
From: Ivailo Monev <xakepa10@gmail.com>
Date: Wed, 28 Dec 2022 11:02:07 +0200
Subject: [PATCH] kimgio: add note about the mask in ico plugin

Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
---
 kimgio/ico.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kimgio/ico.cpp b/kimgio/ico.cpp
index 20e400ef..d72f184a 100644
--- a/kimgio/ico.cpp
+++ b/kimgio/ico.cpp
@@ -366,6 +366,7 @@ bool ICOHandler::write(const QImage &image)
     datastream.writeRawData(bmpimagebits, bmpimagesize);
 #endif
 
+    // NOTE: the mask is undocumented but some browsers fail to load images without mask
     const QImage bmpimagemask = bmpimage.createAlphaMask();
     const char* bmpimagemaskbits = reinterpret_cast<const char*>(bmpimagemask.constBits());
     const int bmpimagemasksize = bmpimagemask.byteCount();