[fireball] 48776: - Take absolute value of ScanLines in GreSetDIBits because it can be negative. Fixes last major issue with arwinss-in-trunk.

Author: fireball
Date: Wed Sep 15 12:56:35 2010
New Revision: 48776

URL: http://svn.reactos.org/svn/reactos?rev=48776&view=rev
Log:
- Take absolute value of ScanLines in GreSetDIBits because it can be negative. Fixes last
major issue with arwinss-in-trunk.

Modified:
    branches/arwinss/reactos/subsystems/win32/win32k/gre/bitblt.c

Modified: branches/arwinss/reactos/subsystems/win32/win32k/gre/bitblt.c
URL:
http://svn.reactos.org/svn/reactos/branches/arwinss/reactos/subsystems/win3…
==============================================================================
--- branches/arwinss/reactos/subsystems/win32/win32k/gre/bitblt.c [iso-8859-1] (original)
+++ branches/arwinss/reactos/subsystems/win32/win32k/gre/bitblt.c [iso-8859-1] Wed Sep 15
12:56:35 2010
@@ -585,7 +585,7 @@
 
     // Create source surface
     SourceSize.cx = bmi->bmiHeader.biWidth;
-    SourceSize.cy = ScanLines;
+    SourceSize.cy = abs(ScanLines);
 
     // Determine width of DIB
     DIBWidth = DIB_GetDIBWidthBytes(SourceSize.cx, bmi->bmiHeader.biBitCount);
@@ -654,10 +654,9 @@
 
     // Determine destination rectangle
     DestRect.left	= 0;
-    DestRect.top	= abs(bmi->bmiHeader.biHeight) - StartScan - ScanLines;
+    DestRect.top	= abs(bmi->bmiHeader.biHeight) - StartScan - SourceSize.cy;
     DestRect.right	= SourceSize.cx;
-    DestRect.bottom	= DestRect.top + ScanLines;
-
+    DestRect.bottom	= DestRect.top + SourceSize.cy;
     copyBitsResult = GreCopyBits(DestSurf, SourceSurf, NULL, &exlo.xlo,
&DestRect, &ZeroPoint);
 
     // If it succeeded, return number of scanlines copies