From 1dcdca34891300c57b7265cc4b9f967b0f4d6968 Mon Sep 17 00:00:00 2001
From: Uwe Rathmann <Uwe.Rathmann@tigertal.de>
Date: Sat, 4 Feb 2023 11:55:06 +0100
Subject: [PATCH] faster isMonochrome calculations

---
 src/common/QskBoxBorderColors.cpp | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/src/common/QskBoxBorderColors.cpp b/src/common/QskBoxBorderColors.cpp
index 15a7680f..87d31046 100644
--- a/src/common/QskBoxBorderColors.cpp
+++ b/src/common/QskBoxBorderColors.cpp
@@ -152,19 +152,24 @@ bool QskBoxBorderColors::isVisible() const
 
 bool QskBoxBorderColors::isMonochrome() const
 {
-    if ( m_gradients[ 1 ] != m_gradients[ 0 ] )
-        return false;
-
-    if ( m_gradients[ 2 ] != m_gradients[ 1 ] )
-        return false;
-
-    if ( m_gradients[ 3 ] != m_gradients[ 2 ] )
-        return false;
-
-    return m_gradients[ 0 ].isMonochrome()
+    if ( m_gradients[ 0 ].isMonochrome()
         && m_gradients[ 1 ].isMonochrome()
         && m_gradients[ 2 ].isMonochrome()
-        && m_gradients[ 3 ].isMonochrome();
+        && m_gradients[ 3 ].isMonochrome() )
+    {
+        if ( m_gradients[ 1 ].rgbStart() != m_gradients[ 0 ].rgbStart() )
+            return false;
+
+        if ( m_gradients[ 2 ].rgbStart() != m_gradients[ 1 ].rgbStart() )
+            return false;
+
+        if ( m_gradients[ 3 ].rgbStart() != m_gradients[ 2 ].rgbStart() )
+            return false;
+
+        return true;
+    }
+
+    return false;
 }
 
 bool QskBoxBorderColors::isValid() const