From c54819463a047a4c8997b2cdc428751c06d0b89b Mon Sep 17 00:00:00 2001
From: cxl <cxl@f0d560ea-af0d-0410-9eb7-867de7ffcac7>
Date: Fri, 22 Jul 2011 14:43:21 +0000
Subject: [PATCH] CtrlCore: Fix in MakeDragImage (fixed premultiplied alpha
 issue)

git-svn-id: svn://ultimatepp.org/upp/trunk@3700 f0d560ea-af0d-0410-9eb7-867de7ffcac7
---
 uppsrc/CtrlCore/CtrlClip.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/uppsrc/CtrlCore/CtrlClip.cpp b/uppsrc/CtrlCore/CtrlClip.cpp
index 4f0fc3c34..9c25484e8 100644
--- a/uppsrc/CtrlCore/CtrlClip.cpp
+++ b/uppsrc/CtrlCore/CtrlClip.cpp
@@ -138,6 +138,7 @@ Image MakeDragImage(const Image& arrow, Image sample)
 		memset(~b, 0, sizeof(RGBA) * b.GetLength());
 		Size ssz = sample.GetSize();
 		Over(b, Point(2, 22), sample, sample.GetSize());
+		Unmultiply(b);
 		for(int y = 20; y < 96; y++) {
 			RGBA *s = b[y];
 			RGBA *e = s + 96;
@@ -185,6 +186,7 @@ Image MakeDragImage(const Image& arrow, Image sample)
 			s += b.GetWidth();
 			Swap(c1, c2);
 		}
+		Premultiply(b);
 		GuiPlatformAdjustDragImage(b);
 		Over(b, Point(0, 0), arrow, arrow.GetSize());
 	}