[tkreuzer] 65392: [WIN32K] Round to nearest integer in FIX2LONG, used in XFORMOBJ APIs. Fixes rounding errors when doing coordinate transformation.

Author: tkreuzer
Date: Thu Nov 13 11:12:56 2014
New Revision: 65392

URL: http://svn.reactos.org/svn/reactos?rev=65392&view=rev
Log:
[WIN32K]
Round to nearest integer in FIX2LONG, used in XFORMOBJ APIs. Fixes rounding errors when doing coordinate transformation.

Modified:
    trunk/reactos/win32ss/gdi/ntgdi/xformobj.c

Modified: trunk/reactos/win32ss/gdi/ntgdi/xformobj.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/ntgdi/xformobj....
==============================================================================
--- trunk/reactos/win32ss/gdi/ntgdi/xformobj.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/ntgdi/xformobj.c	[iso-8859-1] Thu Nov 13 11:12:56 2014
@@ -13,7 +13,7 @@
 #include <debug.h>

C_ASSERT(sizeof(FIX) == sizeof(LONG));
-#define FIX2LONG(x) ((x) >> 4)
+#define FIX2LONG(x) (((x) + 8) >> 4)
 #define LONG2FIX(x) ((x) << 4)

#define FLOATOBJ_Equal _FLOATOBJ_Equal