static Status sys_cursor_create_common(int w, int h, void* bgra_img, void* mask_img, int hx, int hy, sys_cursor* cursor)
{
*cursor = 0;
// MSDN says selecting this HBITMAP into a DC is slower since we use
// CreateBitmap; bpp/format must be checked against those of the DC.
// this is the simplest way and we don't care about slight performance
// differences because this is typically only called once.
HBITMAP hbmColor = CreateBitmap(w, h, 1, 32, bgra_img);
// CreateIconIndirect doesn't access this; we just need to pass
// an empty bitmap.
HBITMAP hbmMask = CreateBitmap(w, h, 1, 1, mask_img);
// create the cursor (really an icon; they differ only in
// fIcon and the hotspot definitions).
ICONINFO ii;
ii.fIcon = FALSE; // cursor
ii.xHotspot = (DWORD)hx;
ii.yHotspot = (DWORD)hy;
ii.hbmMask = hbmMask;
ii.hbmColor = hbmColor;
HICON hIcon = CreateIconIndirect(&ii);
// CreateIconIndirect makes copies, so we no longer need these.
DeleteObject(hbmMask);
DeleteObject(hbmColor);
if(!wutil_IsValidHandle(hIcon))
WARN_RETURN(ERR::FAIL);
*cursor = cursor_from_HICON(hIcon);
return INFO::OK;
}
void AttachToCompletionPort(HANDLE hFile, HANDLE& hIOCP, ULONG_PTR key, DWORD numConcurrentThreads)
{
WinScopedPreserveLastError s; // CreateIoCompletionPort
// (when called for the first time, ends up creating hIOCP)
hIOCP = CreateIoCompletionPort(hFile, hIOCP, key, numConcurrentThreads);
ENSURE(wutil_IsValidHandle(hIOCP));
}
