ddraw: Properly clear the clip list if ddraw_clipper_SetClipList() is called with NULL region data.

dlls/ddraw/clipper.c

@@ -238,10 +238,12 @@ static HRESULT WINAPI ddraw_clipper_SetClipList(IDirectDrawClipper *iface, RGNDA
 
     if (clipper->region)
         DeleteObject(clipper->region);
-    if (!(clipper->region = ExtCreateRegion(NULL, 0, region)))
+    if (!region)
+        clipper->region = NULL;
+    else if (!(clipper->region = ExtCreateRegion(NULL, 0, region)))
     {
         wined3d_mutex_unlock();
-        ERR("Failed to create creation.\n");
+        ERR("Failed to create region.\n");
         return E_FAIL;
     }
 

dlls/ddraw/tests/ddraw1.c

@@ -339,6 +339,12 @@ static void test_clipper_blt(void)
     ok(SUCCEEDED(hr), "Failed to set clipper window, hr %#x.\n", hr);
     hr = IDirectDrawClipper_GetClipList(clipper, NULL, NULL, &ret);
     ok(SUCCEEDED(hr), "Failed to get clip list size, hr %#x.\n", hr);
+    hr = IDirectDrawClipper_SetClipList(clipper, NULL, 0);
+    ok(SUCCEEDED(hr), "Failed to set clip list, hr %#x.\n", hr);
+    hr = IDirectDrawClipper_GetClipList(clipper, NULL, NULL, &ret);
+    ok(hr == DDERR_NOCLIPLIST, "Got unexpected hr %#x.\n", hr);
+    hr = IDirectDrawSurface_Blt(dst_surface, NULL, NULL, NULL, DDBLT_COLORFILL | DDBLT_WAIT, &fx);
+    ok(hr == DDERR_NOCLIPLIST, "Got unexpected hr %#x.\n", hr);
 
     IDirectDrawSurface_Release(dst_surface);
     IDirectDrawSurface_Release(src_surface);

dlls/ddraw/tests/ddraw2.c

@@ -346,6 +346,12 @@ static void test_clipper_blt(void)
     ok(SUCCEEDED(hr), "Failed to set clipper window, hr %#x.\n", hr);
     hr = IDirectDrawClipper_GetClipList(clipper, NULL, NULL, &ret);
     ok(SUCCEEDED(hr), "Failed to get clip list size, hr %#x.\n", hr);
+    hr = IDirectDrawClipper_SetClipList(clipper, NULL, 0);
+    ok(SUCCEEDED(hr), "Failed to set clip list, hr %#x.\n", hr);
+    hr = IDirectDrawClipper_GetClipList(clipper, NULL, NULL, &ret);
+    ok(hr == DDERR_NOCLIPLIST, "Got unexpected hr %#x.\n", hr);
+    hr = IDirectDrawSurface_Blt(dst_surface, NULL, NULL, NULL, DDBLT_COLORFILL | DDBLT_WAIT, &fx);
+    ok(hr == DDERR_NOCLIPLIST, "Got unexpected hr %#x.\n", hr);
 
     IDirectDrawSurface_Release(dst_surface);
     IDirectDrawSurface_Release(src_surface);

dlls/ddraw/tests/ddraw4.c

@@ -641,6 +641,12 @@ static void test_clipper_blt(void)
     ok(SUCCEEDED(hr), "Failed to set clipper window, hr %#x.\n", hr);
     hr = IDirectDrawClipper_GetClipList(clipper, NULL, NULL, &ret);
     ok(SUCCEEDED(hr), "Failed to get clip list size, hr %#x.\n", hr);
+    hr = IDirectDrawClipper_SetClipList(clipper, NULL, 0);
+    ok(SUCCEEDED(hr), "Failed to set clip list, hr %#x.\n", hr);
+    hr = IDirectDrawClipper_GetClipList(clipper, NULL, NULL, &ret);
+    ok(hr == DDERR_NOCLIPLIST, "Got unexpected hr %#x.\n", hr);
+    hr = IDirectDrawSurface4_Blt(dst_surface, NULL, NULL, NULL, DDBLT_COLORFILL | DDBLT_WAIT, &fx);
+    ok(hr == DDERR_NOCLIPLIST, "Got unexpected hr %#x.\n", hr);
 
     IDirectDrawSurface4_Release(dst_surface);
     IDirectDrawSurface4_Release(src_surface);

dlls/ddraw/tests/ddraw7.c

@@ -634,6 +634,12 @@ static void test_clipper_blt(void)
     ok(SUCCEEDED(hr), "Failed to set clipper window, hr %#x.\n", hr);
     hr = IDirectDrawClipper_GetClipList(clipper, NULL, NULL, &ret);
     ok(SUCCEEDED(hr), "Failed to get clip list size, hr %#x.\n", hr);
+    hr = IDirectDrawClipper_SetClipList(clipper, NULL, 0);
+    ok(SUCCEEDED(hr), "Failed to set clip list, hr %#x.\n", hr);
+    hr = IDirectDrawClipper_GetClipList(clipper, NULL, NULL, &ret);
+    ok(hr == DDERR_NOCLIPLIST, "Got unexpected hr %#x.\n", hr);
+    hr = IDirectDrawSurface7_Blt(dst_surface, NULL, NULL, NULL, DDBLT_COLORFILL | DDBLT_WAIT, &fx);
+    ok(hr == DDERR_NOCLIPLIST, "Got unexpected hr %#x.\n", hr);
 
     IDirectDrawSurface7_Release(dst_surface);
     IDirectDrawSurface7_Release(src_surface);