[ros-diffs] [tkreuzer] 56425: [WIN32K] Make sure a bitmap is compatible with the dc before selecting it.

Author: tkreuzer
Date: Wed Apr 25 19:25:48 2012
New Revision: 56425

URL: http://svn.reactos.org/svn/reactos?rev=56425&view=rev
Log:
[WIN32K]
Make sure a bitmap is compatible with the dc before selecting it.

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

Modified: trunk/reactos/win32ss/gdi/ntgdi/dcobjs.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/ntgdi/dcobjs.c…
==============================================================================
--- trunk/reactos/win32ss/gdi/ntgdi/dcobjs.c [iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/ntgdi/dcobjs.c [iso-8859-1] Wed Apr 25 19:25:48 2012
@@ -265,6 +265,7 @@
     PSURFACE psurfNew, psurfOld;
     HRGN hVisRgn;
     HDC hdcOld;
+    ULONG cBitsPixel;
     ASSERT_NOGDILOCKS();
 
     /* Verify parameters */
@@ -329,24 +330,36 @@
             return NULL;
         }
 
-        /* Set the bitmap's hdc and check if it was set before */
-        hdcOld = InterlockedCompareExchangePointer((PVOID*)&psurfNew->hdc, hdc,
0);
-        if (hdcOld != NULL)
-        {
-            /* The bitmap is already selected into a different DC */
-            ASSERT(hdcOld != hdc);
-
+        /* Check if the bitmap is compatile with the dc */
+        cBitsPixel = gajBitsPerFormat[psurfNew->SurfObj.iBitmapFormat];
+        if ((cBitsPixel != 1) &&
+            (cBitsPixel != pdc->ppdev->gdiinfo.cBitsPixel) &&
+            (psurfNew->hSecure == NULL))
+        {
             /* Dereference the bitmap, unlock the DC and fail. */
             SURFACE_ShareUnlockSurface(psurfNew);
             DC_UnlockDc(pdc);
             return NULL;
         }
 
+        /* Set the bitmap's hdc and check if it was set before */
+        hdcOld = InterlockedCompareExchangePointer((PVOID*)&psurfNew->hdc, hdc,
0);
+        if (hdcOld != NULL)
+        {
+            /* The bitmap is already selected into a different DC */
+            ASSERT(hdcOld != hdc);
+
+            /* Dereference the bitmap, unlock the DC and fail. */
+            SURFACE_ShareUnlockSurface(psurfNew);
+            DC_UnlockDc(pdc);
+            return NULL;
+        }
+
         /* Copy the bitmap size */
         pdc->dclevel.sizl = psurfNew->SurfObj.sizlBitmap;
 
         /* Check if the bitmap is a dibsection */
-        if(psurfNew->hSecure)
+        if (psurfNew->hSecure)
         {
             /* Set DIBSECTION attribute */
             pdc->pdcattr->ulDirty_ |= DC_DIBSECTION;