void CXTPPopupControl::SetRegionAlphaLayer(CXTPImageManagerIcon* pIcon)
{
if (!pIcon)
return;
if (!m_pfnUpdateLayeredWindow)
return;
CXTPImageManagerIconHandle hShadow;
hShadow.CopyHandle(pIcon->GetIcon());
if (!hShadow.PreMultiply())
return;
PBYTE pBits = hShadow.PreMultiply();
CSize szIcon = hShadow.GetExtent();
int cx = szIcon.cx;
int cy = szIcon.cy;
BLENDFUNCTION bf;
bf.BlendOp = AC_SRC_OVER;
bf.BlendFlags = 0;
bf.SourceConstantAlpha = 255;
bf.AlphaFormat = 0x01;
POINT pt = {0, 0};
CClientDC cDC(this);
CDC dc;
dc.CreateCompatibleDC(&cDC);
UINT* pvBits = NULL;
HBITMAP hBitmap = CXTPImageManager::Create32BPPDIBSection(cDC, cx, cy, (LPBYTE*)&pvBits);
if (pvBits == NULL || hBitmap == NULL)
return;
MEMCPY_S(pvBits, pBits, cx * cy* 4);
HBITMAP hOld = (HBITMAP)SelectObject(dc, hBitmap);
ModifyStyleEx(0, WS_EX_LAYERED);
m_pfnUpdateLayeredWindow((HWND)GetSafeHwnd(), (HDC)0, 0, &szIcon, dc.GetSafeHdc(), &pt, 0, &bf, 0x02);
SelectObject(dc, hOld);
DeleteObject(hBitmap);
dc.DeleteDC();
m_bLayered = TRUE;
}
