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Fixed blitting with a window clipper when the window region is empty

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Fixes invisible menu buttons after alt-tabbing in Red Alert 2 (issue #262).
This commit is contained in:
narzoul 2024-03-23 17:49:08 +01:00
parent bc88dd2e92
commit f36a255ac9
2 changed files with 12 additions and 10 deletions
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19
DDrawCompat/DDraw/DirectDrawClipper.cpp
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@ -53,11 +53,16 @@ namespace
}
DWORD rgnSize = GetRegionData(rgn, 0, nullptr);
std::vector<unsigned char> rgnData(rgnSize);
GetRegionData(rgn, rgnSize, reinterpret_cast<RGNDATA*>(rgnData.data()));
std::vector<unsigned char> rgnDataBuf(std::max<DWORD>(rgnSize, sizeof(RGNDATA)));
RGNDATA* rgnData = reinterpret_cast<RGNDATA*>(rgnDataBuf.data());
GetRegionData(rgn, rgnSize, rgnData);
if (0 == rgnData->rdh.nCount)
{
rgnData->rdh.nCount = 1;
}
clipper->SetHWnd(&clipper, 0, nullptr);
clipper->SetClipList(&clipper, rgnData.empty() ? nullptr : reinterpret_cast<RGNDATA*>(rgnData.data()), 0);
clipper->SetClipList(&clipper, rgnData, 0);
}
HRESULT STDMETHODCALLTYPE GetHWnd(IDirectDrawClipper* This, HWND* lphWnd)
@ -199,13 +204,9 @@ namespace DDraw
void update()
{
if (g_isInvalidated)
for (auto& clipperData : g_clipperData)
{
g_isInvalidated = false;
for (auto& clipperData : g_clipperData)
{
updateWindowClipList(*clipperData.first, clipperData.second);
}
updateWindowClipList(*clipperData.first, clipperData.second);
}
}

3
DDrawCompat/Gdi/WinProc.cpp
View File

@ -372,7 +372,8 @@ namespace
int WINAPI getRandomRgn(HDC hdc, HRGN hrgn, INT i)
{
return Gdi::Window::getRandomRgn(hdc, hrgn, i);
LOG_FUNC("GetRandomRgn", hdc, hrgn, i);
return LOG_RESULT(Gdi::Window::getRandomRgn(hdc, hrgn, i));
}
LONG getWindowLong(HWND hWnd, int nIndex,