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improve error checks

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This commit is contained in:
FunkyFr3sh 2024-05-26 09:29:14 +02:00
parent 5bbe1299d2
commit 63033840d9
1 changed files with 11 additions and 5 deletions
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16
src/ddclipper.c
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@ -69,11 +69,14 @@ HRESULT ddc_SetClipList(IDirectDrawClipperImpl* This, LPRGNDATA lpClipList, DWOR
if (This->hwnd)
return DDERR_CLIPPERISUSINGHWND;
if (This->region)
DeleteObject(This->region);
if (lpClipList && lpClipList->rdh.nCount >= 1)
if (lpClipList)
{
if (!lpClipList->rdh.nCount)
return DDERR_INVALIDCLIPLIST;
if (This->region)
DeleteObject(This->region);
RECT* rc = (RECT*)lpClipList->Buffer;
This->region = CreateRectRgnIndirect(&rc[0]);
@ -88,7 +91,7 @@ HRESULT ddc_SetClipList(IDirectDrawClipperImpl* This, LPRGNDATA lpClipList, DWOR
if (!region)
return DDERR_INVALIDCLIPLIST;
if (CombineRgn(This->region, region, This->region, RGN_OR) == ERROR)
if (CombineRgn(This->region, region, This->region, RGN_XOR) == ERROR)
{
DeleteObject(region);
DeleteObject(This->region);
@ -102,6 +105,9 @@ HRESULT ddc_SetClipList(IDirectDrawClipperImpl* This, LPRGNDATA lpClipList, DWOR
}
else
{
if (This->region)
DeleteObject(This->region);
This->region = NULL;
}