From 94272b6ba8e9199bb314ca04521b5a4d5c1cc87a Mon Sep 17 00:00:00 2001
From: Johannes Schickel
Date: Tue, 30 May 2006 16:48:15 +0000
Subject: Should fix drawing on systems with alpha mask.

svn-id: r22773
---
 gui/ThemeNew.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'gui')

diff --git a/gui/ThemeNew.cpp b/gui/ThemeNew.cpp
index 9fc9c06eda..5d533035aa 100644
--- a/gui/ThemeNew.cpp
+++ b/gui/ThemeNew.cpp
@@ -1638,6 +1638,7 @@ inline OverlayColor getColorAlphaImpl(OverlayColor col1, OverlayColor col2, int
 	output |= ((alpha * ((col1 & T::kRedMask) - (col2 & T::kRedMask)) >> 8) + (col2 & T::kRedMask)) & T::kRedMask;
 	output |= ((alpha * ((col1 & T::kGreenMask) - (col2 & T::kGreenMask)) >> 8) + (col2 & T::kGreenMask)) & T::kGreenMask;
 	output |= ((alpha * ((col1 & T::kBlueMask) - (col2 & T::kBlueMask)) >> 8) + (col2 & T::kBlueMask)) & T::kBlueMask;
+	output |= ~(T::kRedMask | T::kGreenMask | T::kBlueMask);
 	return output;
 }
 
@@ -1648,6 +1649,7 @@ inline OverlayColor getColorAlphaImp2(OverlayColor col1, OverlayColor col2, int
 	output |= ((alpha * ((~col1 & T::kRedMask) - (col2 & T::kRedMask)) >> 8) + (col2 & T::kRedMask)) & T::kRedMask;
 	output |= ((alpha * ((~col1 & T::kGreenMask) - (col2 & T::kGreenMask)) >> 8) + (col2 & T::kGreenMask)) & T::kGreenMask;
 	output |= ((alpha * ((~col1 & T::kBlueMask) - (col2 & T::kBlueMask)) >> 8) + (col2 & T::kBlueMask)) & T::kBlueMask;
+	output |= ~(T::kRedMask | T::kGreenMask | T::kBlueMask);
 	return output;
 }
 
@@ -1673,6 +1675,7 @@ inline OverlayColor calcGradient(OverlayColor start, OverlayColor end, int pos)
 	output |= (start + ((((end & T::kRedMask) - (start & T::kRedMask))) * pos >> 12)) & T::kRedMask;
 	output |= (start + ((((end & T::kGreenMask) - (start & T::kGreenMask))) * pos >> 12)) & T::kGreenMask;
 	output |= (start + ((((end & T::kBlueMask) - (start & T::kBlueMask))) * pos >> 12)) & T::kBlueMask;
+	output |= ~(T::kRedMask | T::kGreenMask | T::kBlueMask);
 	return output;
 }
 
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