Index: win32ss/gdi/dib/alphablend.c
===================================================================
--- win32ss/gdi/dib/alphablend.c	(revision 71208)
+++ win32ss/gdi/dib/alphablend.c	(working copy)
@@ -38,7 +38,7 @@
   BLENDFUNCTION BlendFunc;
   register NICEPIXEL32 DstPixel32;
   register NICEPIXEL32 SrcPixel32;
-  UCHAR Alpha, SrcBpp = BitsPerFormat(Source->iBitmapFormat);
+  UCHAR Alpha;
   EXLATEOBJ* pexlo;
   EXLATEOBJ exloSrcRGB, exloDstRGB, exloRGBSrc;
   PFN_DIB_PutPixel pfnDibPutPixel = DibFunctionsForBitmapFormat[Dest->iBitmapFormat].DIB_PutPixel;
@@ -48,27 +48,6 @@
     DestRect->left, DestRect->top, DestRect->right, DestRect->bottom);
 
   BlendFunc = BlendObj->BlendFunction;
-  if (BlendFunc.BlendOp != AC_SRC_OVER)
-  {
-    DPRINT1("BlendOp != AC_SRC_OVER\n");
-    return FALSE;
-  }
-  if (BlendFunc.BlendFlags != 0)
-  {
-    DPRINT1("BlendFlags != 0\n");
-    return FALSE;
-  }
-  if ((BlendFunc.AlphaFormat & ~AC_SRC_ALPHA) != 0)
-  {
-    DPRINT1("Unsupported AlphaFormat (0x%x)\n", BlendFunc.AlphaFormat);
-    return FALSE;
-  }
-  if ((BlendFunc.AlphaFormat & AC_SRC_ALPHA) != 0 &&
-    SrcBpp != 32)
-  {
-    DPRINT1("Source bitmap must be 32bpp when AC_SRC_ALPHA is set\n");
-    return FALSE;
-  }
 
   if (!ColorTranslation)
   {
Index: win32ss/gdi/dib/dib16bpp.c
===================================================================
--- win32ss/gdi/dib/dib16bpp.c	(revision 71208)
+++ win32ss/gdi/dib/dib16bpp.c	(working copy)
@@ -589,27 +589,6 @@
     DestRect->left, DestRect->top, DestRect->right, DestRect->bottom);
 
   BlendFunc = BlendObj->BlendFunction;
-  if (BlendFunc.BlendOp != AC_SRC_OVER)
-  {
-    DPRINT1("BlendOp != AC_SRC_OVER\n");
-    return FALSE;
-  }
-  if (BlendFunc.BlendFlags != 0)
-  {
-    DPRINT1("BlendFlags != 0\n");
-    return FALSE;
-  }
-  if ((BlendFunc.AlphaFormat & ~AC_SRC_ALPHA) != 0)
-  {
-    DPRINT1("Unsupported AlphaFormat (0x%x)\n", BlendFunc.AlphaFormat);
-    return FALSE;
-  }
-  if ((BlendFunc.AlphaFormat & AC_SRC_ALPHA) != 0 &&
-          (BitsPerFormat(Source->iBitmapFormat) != 32))
-  {
-    DPRINT1("Source bitmap must be 32bpp when AC_SRC_ALPHA is set\n");
-    return FALSE;
-  }
 
   if (!ColorTranslation)
   {
Index: win32ss/gdi/dib/dib24bpp.c
===================================================================
--- win32ss/gdi/dib/dib24bpp.c	(revision 71208)
+++ win32ss/gdi/dib/dib24bpp.c	(working copy)
@@ -477,27 +477,6 @@
           DestRect->left, DestRect->top, DestRect->right, DestRect->bottom);
 
    BlendFunc = BlendObj->BlendFunction;
-   if (BlendFunc.BlendOp != AC_SRC_OVER)
-   {
-      DPRINT1("BlendOp != AC_SRC_OVER\n");
-      return FALSE;
-   }
-   if (BlendFunc.BlendFlags != 0)
-   {
-      DPRINT1("BlendFlags != 0\n");
-      return FALSE;
-   }
-   if ((BlendFunc.AlphaFormat & ~AC_SRC_ALPHA) != 0)
-   {
-      DPRINT1("Unsupported AlphaFormat (0x%x)\n", BlendFunc.AlphaFormat);
-      return FALSE;
-   }
-   if ((BlendFunc.AlphaFormat & AC_SRC_ALPHA) != 0 &&
-       BitsPerFormat(Source->iBitmapFormat) != 32)
-   {
-      DPRINT1("Source bitmap must be 32bpp when AC_SRC_ALPHA is set\n");
-      return FALSE;
-   }
 
    Dst = (PUCHAR)((ULONG_PTR)Dest->pvScan0 + (DestRect->top * Dest->lDelta) +
                              (DestRect->left * 3));
Index: win32ss/gdi/dib/dib32bpp.c
===================================================================
--- win32ss/gdi/dib/dib32bpp.c	(revision 71208)
+++ win32ss/gdi/dib/dib32bpp.c	(working copy)
@@ -357,27 +357,6 @@
     DestRect->left, DestRect->top, DestRect->right, DestRect->bottom);
 
   BlendFunc = BlendObj->BlendFunction;
-  if (BlendFunc.BlendOp != AC_SRC_OVER)
-  {
-    DPRINT1("BlendOp != AC_SRC_OVER\n");
-    return FALSE;
-  }
-  if (BlendFunc.BlendFlags != 0)
-  {
-    DPRINT1("BlendFlags != 0\n");
-    return FALSE;
-  }
-  if ((BlendFunc.AlphaFormat & ~AC_SRC_ALPHA) != 0)
-  {
-    DPRINT1("Unsupported AlphaFormat (0x%x)\n", BlendFunc.AlphaFormat);
-    return FALSE;
-  }
-  if ((BlendFunc.AlphaFormat & AC_SRC_ALPHA) != 0 &&
-       BitsPerFormat(Source->iBitmapFormat) != 32)
-  {
-    DPRINT1("Source bitmap must be 32bpp when AC_SRC_ALPHA is set\n");
-    return FALSE;
-  }
 
   Dst = (PULONG)((ULONG_PTR)Dest->pvScan0 + (DestRect->top * Dest->lDelta) +
     (DestRect->left << 2));
Index: win32ss/gdi/eng/alphablend.c
===================================================================
--- win32ss/gdi/eng/alphablend.c	(revision 71208)
+++ win32ss/gdi/eng/alphablend.c	(working copy)
@@ -89,6 +89,12 @@
         DPRINT1("Unsupported AlphaFormat (0x%x)\n", BlendObj->BlendFunction.AlphaFormat);
         return FALSE;
     }
+    if ((BlendObj->BlendFunction.AlphaFormat & AC_SRC_ALPHA) != 0 &&
+        BitsPerFormat(psoSource->iBitmapFormat) != 32)
+    {
+        DPRINT1("Source bitmap must be 32bpp when AC_SRC_ALPHA is set\n");
+        return FALSE;
+    }
 
     /* Check if there is anything to draw */
     if (ClipRegion != NULL &&
@@ -111,6 +117,8 @@
 
     if (!IntEngEnter(&EnterLeaveDest, psoDest, &OutputRect, FALSE, &Translate, &OutputObj))
     {
+        /* Release resources allocated by previous call */
+        IntEngLeave(&EnterLeaveSource);
         return FALSE;
     }
     OutputRect.left += Translate.x;