[tkreuzer] 66612: [WIN32K] NtGdiSetDIBitsToDeviceInternal: Check for ScanLines == 0 and clean up exit pathes. Fixes assertion failure in gdi32_winetest:bitmap

Author: tkreuzer
Date: Sun Mar  8 22:44:36 2015
New Revision: 66612

URL: http://svn.reactos.org/svn/reactos?rev=66612&view=rev
Log:
[WIN32K]
NtGdiSetDIBitsToDeviceInternal: Check for ScanLines == 0 and clean up exit pathes. Fixes assertion failure in gdi32_winetest:bitmap

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

Modified: trunk/reactos/win32ss/gdi/ntgdi/dibobj.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/ntgdi/dibobj.c?...
==============================================================================
--- trunk/reactos/win32ss/gdi/ntgdi/dibobj.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/ntgdi/dibobj.c	[iso-8859-1] Sun Mar  8 22:44:36 2015
@@ -461,7 +461,7 @@
 {
     INT ret = 0;
     NTSTATUS Status = STATUS_SUCCESS;
-    PDC pDC;
+    PDC pDC = NULL;
     HBITMAP hSourceBitmap = NULL, hMaskBitmap = NULL;
     SURFOBJ *pDestSurf, *pSourceSurf = NULL, *pMaskSurf = NULL;
     SURFACE *pSurf;
@@ -493,21 +493,25 @@

if (!NT_SUCCESS(Status))
     {
-        goto Exit2;
+        goto Exit;
     }

ScanLines = min(ScanLines, abs(bmi->bmiHeader.biHeight) - StartScan);
+    if (ScanLines == 0)
+    {
+        DPRINT1("ScanLines == 0\n");
+        goto Exit;
+    }

pDC = DC_LockDc(hDC);
     if (!pDC)
     {
         EngSetLastError(ERROR_INVALID_HANDLE);
-        goto Exit2;
+        goto Exit;
     }

if (pDC->dctype == DC_TYPE_INFO)
     {
-        DC_UnlockDc(pDC);
         goto Exit;
     }

@@ -637,14 +641,13 @@
     }

if (ppalDIB) PALETTE_ShareUnlockPalette(ppalDIB);
-
     if (pSourceSurf) EngUnlockSurface(pSourceSurf);
     if (hSourceBitmap) EngDeleteSurface((HSURF)hSourceBitmap);
     if (pMaskSurf) EngUnlockSurface(pMaskSurf);
     if (hMaskBitmap) EngDeleteSurface((HSURF)hMaskBitmap);
-    DC_UnlockDc(pDC);
-Exit2:
+    if (pDC) DC_UnlockDc(pDC);
     ExFreePoolWithTag(pbmiSafe, 'pmTG');
+
     return ret;
 }