Günther Brammer : ddraw: Return a nullpointer as lpSurface in Lock() if the rect is invalid.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: df5116cc7da2dbd26abf58b3442bdd889595d8f0
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=df5116cc7da2dbd26abf58b3442bdd889595d8f0

Author: Günther Brammer <GBrammer at gmx.de>
Date:   Mon Feb 25 16:22:41 2008 +0100

ddraw: Return a nullpointer as lpSurface in Lock() if the rect is invalid.

---

 dlls/ddraw/surface.c        |   32 ++++++++++++++++++--------------
 dlls/ddraw/tests/dsurface.c |    4 ++++
 2 files changed, 22 insertions(+), 14 deletions(-)

diff --git a/dlls/ddraw/surface.c b/dlls/ddraw/surface.c
index a167806..ae57bb4 100644
--- a/dlls/ddraw/surface.c
+++ b/dlls/ddraw/surface.c
@@ -577,20 +577,6 @@ IDirectDrawSurfaceImpl_Lock(IDirectDrawSurface7 *iface,
 
     /* This->surface_desc.dwWidth and dwHeight are changeable, thus lock */
     EnterCriticalSection(&ddraw_cs);
-    if (Rect)
-    {
-        if ((Rect->left < 0)
-                || (Rect->top < 0)
-                || (Rect->left > Rect->right)
-                || (Rect->top > Rect->bottom)
-                || (Rect->right > This->surface_desc.dwWidth)
-                || (Rect->bottom > This->surface_desc.dwHeight))
-        {
-            WARN("Trying to lock an invalid rectangle, returning DDERR_INVALIDPARAMS\n");
-            LeaveCriticalSection(&ddraw_cs);
-            return DDERR_INVALIDPARAMS;
-        }
-    }
 
     /* Should I check for the handle to be NULL?
      *
@@ -606,6 +592,24 @@ IDirectDrawSurfaceImpl_Lock(IDirectDrawSurface7 *iface,
         return DDERR_INVALIDPARAMS;
     }
 
+    /* Windows zeroes this if the rect is invalid */
+    DDSD->lpSurface = 0;
+
+    if (Rect)
+    {
+        if ((Rect->left < 0)
+                || (Rect->top < 0)
+                || (Rect->left > Rect->right)
+                || (Rect->top > Rect->bottom)
+                || (Rect->right > This->surface_desc.dwWidth)
+                || (Rect->bottom > This->surface_desc.dwHeight))
+        {
+            WARN("Trying to lock an invalid rectangle, returning DDERR_INVALIDPARAMS\n");
+            LeaveCriticalSection(&ddraw_cs);
+            return DDERR_INVALIDPARAMS;
+        }
+    }
+
     hr = IWineD3DSurface_LockRect(This->WineD3DSurface,
                                   &LockedRect,
                                   Rect,
diff --git a/dlls/ddraw/tests/dsurface.c b/dlls/ddraw/tests/dsurface.c
index cc7760e..cf3ae6f 100644
--- a/dlls/ddraw/tests/dsurface.c
+++ b/dlls/ddraw/tests/dsurface.c
@@ -1652,10 +1652,14 @@ static void test_lockrect_invalid(void)
         {
             RECT *rect = &invalid[i];
 
+            memset(&locked_desc, 1, sizeof(locked_desc));
+            locked_desc.dwSize = sizeof(locked_desc);
+
             hr = IDirectDrawSurface_Lock(surface, rect, &locked_desc, DDLOCK_WAIT, NULL);
             ok(hr == DDERR_INVALIDPARAMS, "Lock returned 0x%08x for rect [%d, %d]->[%d, %d]"
                     ", expected DDERR_INVALIDPARAMS (0x%08x)\n", hr, rect->left, rect->top,
                     rect->right, rect->bottom, DDERR_INVALIDPARAMS);
+            ok(!locked_desc.lpSurface, "IDirectDrawSurface_Lock did not set lpSurface in the surface desc to zero.\n");
         }
 
         hr = IDirectDrawSurface_Lock(surface, NULL, &locked_desc, DDLOCK_WAIT, NULL);