[PATCH v3 4/4] comctl32: Use a magic value to check if an image list is valid.

[Zhiyi Zhang]

From: Zhiyi Zhang

Use a magic value to check if an image list is valid instead of using vtable addresses. So that an
image list from comctl32 v5 can be used with comctl32 v6 image list functions and vice versa.

Fix missing icons in the listview window of the Word 2010 file open dialog.
---
 dlls/comctl32/imagelist.c       | 5 ++++-
 dlls/comctl32/tests/imagelist.c | 6 ------
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/dlls/comctl32/imagelist.c b/dlls/comctl32/imagelist.c
index 493aebd0b45..93c502ec0bd 100644
--- a/dlls/comctl32/imagelist.c
+++ b/dlls/comctl32/imagelist.c
@@ -71,6 +71,7 @@ struct _IMAGELIST
     INT         nOvlIdx[MAX_OVERLAYIMAGE]; /* 38: overlay images index */

/* not yet found out */
+    DWORD   magic;
     HBRUSH  hbrBlend25;
     HBRUSH  hbrBlend50;
     INT     cInitial;
@@ -3214,6 +3215,7 @@ static ULONG WINAPI ImageListImpl_Release(IImageList2 *iface)
         if (This->hbrBlend50) DeleteObject (This->hbrBlend50);

This->IImageList2_iface.lpVtbl = NULL;
+        This->magic = 0;
         Free(This->item_flags);
         Free(This);
     }
@@ -3797,7 +3799,7 @@ static BOOL is_valid(HIMAGELIST himl)
     BOOL valid;
     __TRY
     {
-        valid = himl && himl->IImageList2_iface.lpVtbl == &ImageListImpl_Vtbl;
+        valid = himl && himl->magic == IMAGELIST_MAGIC;
     }
     __EXCEPT_PAGE_FAULT
     {
@@ -3844,6 +3846,7 @@ static HRESULT ImageListImpl_CreateInstance(const IUnknown *pUnkOuter, REFIID ii
     if (!This) return E_OUTOFMEMORY;

This->IImageList2_iface.lpVtbl = &ImageListImpl_Vtbl;
+    This->magic = IMAGELIST_MAGIC;
     This->ref = 1;

ret = IImageList2_QueryInterface(&This->IImageList2_iface, iid, ppv);
diff --git a/dlls/comctl32/tests/imagelist.c b/dlls/comctl32/tests/imagelist.c
index 8647fd5a62a..c8a1a25b71d 100644
--- a/dlls/comctl32/tests/imagelist.c
+++ b/dlls/comctl32/tests/imagelist.c
@@ -2938,13 +2938,10 @@ static void test_imagelist_interop(void)
     cx = 0;
     cy = 0;
     ret = pImageList_GetIconSize(himl, &cx, &cy);
-    todo_wine
     ok(ret, "ImageList_GetIconSize failed.\n");
-    todo_wine
     ok(cx == 1 && cy == 1, "Got unexpected size %dx%d.\n", cx, cy);

ret = pImageList_Destroy(himl);
-    todo_wine
     ok(ret, "ImageList_Destroy failed.\n");

/* Create a v6 imagelist and use it with v5 imagelist functions */
@@ -2954,13 +2951,10 @@ static void test_imagelist_interop(void)
     cx = 0;
     cy = 0;
     ret = pImageList_GetIconSize_v5(himl, &cx, &cy);
-    todo_wine
     ok(ret, "ImageList_GetIconSize failed.\n");
-    todo_wine
     ok(cx == 1 && cy == 1, "Got unexpected size %dx%d.\n", cx, cy);

ret = pImageList_Destroy_v5(himl);
-    todo_wine
     ok(ret, "ImageList_Destroy failed.\n");

FreeLibrary(comctl32_v5);