[ros-diffs] [khornicek] 50935: [WIN32K] Fix calculating of ScanLines and source point in NtGdiGetDIBitsInternal for top-down bitmaps to more closely mimic win xp behavior. (Timo - high five for your test app) ...

[khornicek]

Author: khornicek
Date: Mon Feb 28 12:47:01 2011
New Revision: 50935

URL: http://svn.reactos.org/svn/reactos?rev=50935&view=rev
Log:
[WIN32K]
Fix calculating of ScanLines and source point in NtGdiGetDIBitsInternal for 
top-down bitmaps to more closely mimic win xp behavior. (Timo - high five for 
your test app)
See issue #5524 for more details.

Modified:
    trunk/reactos/subsystems/win32/win32k/objects/dibobj.c

Modified: trunk/reactos/subsystems/win32/win32k/objects/dibobj.c
URL: 
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/objects/dibobj.c?rev=50935&r1=50934&r2=50935&view=diff
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/objects/dibobj.c [iso-8859-1] 
(original)
+++ trunk/reactos/subsystems/win32/win32k/objects/dibobj.c [iso-8859-1] Mon Feb 
28 12:47:01 2011
@@ -939,9 +939,26 @@
                rcDest.bottom = ScanLines;
                rcDest.right = psurf->SurfObj.sizlBitmap.cx;
 
-               srcPoint.x = 0;
-               srcPoint.y = height < 0 ?
-                       psurf->SurfObj.sizlBitmap.cy - (StartScan + ScanLines) 
: StartScan;
+        srcPoint.x = 0;
+
+        if(height < 0)
+        {
+            srcPoint.y = 0;
+
+            if(ScanLines <= StartScan)
+            {
+                ScanLines = 1;
+                SURFACE_ShareUnlockSurface(psurfDest);
+                GreDeleteObject(hBmpDest);
+                goto done;
+            }
+
+            ScanLines -= StartScan;
+        }
+        else
+        {
+            srcPoint.y = StartScan;
+        }
 
                EXLATEOBJ_vInitialize(&exlo, psurf->ppal, psurfDest->ppal, 
0xffffff, 0xffffff, 0);