bool CImageMixer_EVR::GetMapSize(int *pWidth,int *pHeight)
{
bool fOK=false;
IMFGetService *pGetService;
if (SUCCEEDED(m_pRenderer->QueryInterface(IID_IMFGetService,
reinterpret_cast<LPVOID*>(&pGetService)))) {
IMFVideoDisplayControl *pDisplayControl;
if (SUCCEEDED(pGetService->GetService(MR_VIDEO_RENDER_SERVICE,
IID_IMFVideoDisplayControl,
reinterpret_cast<LPVOID*>(&pDisplayControl)))) {
SIZE Size;
if (SUCCEEDED(pDisplayControl->GetNativeVideoSize(&Size,NULL))) {
if (pWidth)
*pWidth=Size.cx;
if (pHeight)
*pHeight=Size.cy;
fOK=true;
}
pDisplayControl->Release();
}
pGetService->Release();
}
return fOK;
}
bool CImageMixer_EVR::SetBitmap(HBITMAP hbm,int Opacity,COLORREF TransColor,RECT *pDestRect)
{
IMFGetService *pGetService;
IMFVideoDisplayControl *pDisplayControl;
IMFVideoMixerBitmap *pMixerBitmap;
SIZE NativeSize;
BITMAP bm;
MFVideoAlphaBitmap ab;
HRESULT hr;
if (!CreateMemDC())
return false;
if (FAILED(m_pRenderer->QueryInterface(IID_IMFGetService,
reinterpret_cast<LPVOID*>(&pGetService))))
return false;
if (FAILED(pGetService->GetService(MR_VIDEO_MIXER_SERVICE,
IID_IMFVideoMixerBitmap,
reinterpret_cast<LPVOID*>(&pMixerBitmap)))) {
pGetService->Release();
return false;
}
if (FAILED(pGetService->GetService(MR_VIDEO_RENDER_SERVICE,
IID_IMFVideoDisplayControl,
reinterpret_cast<LPVOID*>(&pDisplayControl)))) {
pMixerBitmap->Release();
pGetService->Release();
return false;
}
hr=pDisplayControl->GetNativeVideoSize(&NativeSize,NULL);
pDisplayControl->Release();
if (FAILED(hr)) {
pMixerBitmap->Release();
pGetService->Release();
return false;
}
::SelectObject(m_hdc,hbm);
ab.GetBitmapFromDC=TRUE;
ab.bitmap.hdc=m_hdc;
ab.params.dwFlags=MFVideoAlphaBitmap_SrcRect | MFVideoAlphaBitmap_DestRect |
MFVideoAlphaBitmap_Alpha;
if (TransColor!=CLR_INVALID) {
ab.params.dwFlags|=MFVideoAlphaBitmap_SrcColorKey;
ab.params.clrSrcKey=TransColor;
}
::GetObject(hbm,sizeof(BITMAP),&bm);
::SetRect(&ab.params.rcSrc,0,0,bm.bmWidth,bm.bmHeight);
ab.params.nrcDest.left=(float)pDestRect->left/(float)NativeSize.cx;
ab.params.nrcDest.top=(float)pDestRect->top/(float)NativeSize.cy;
ab.params.nrcDest.right=(float)pDestRect->right/(float)NativeSize.cx;
ab.params.nrcDest.bottom=(float)pDestRect->bottom/(float)NativeSize.cy;
ab.params.fAlpha=(float)Opacity/100.0f;
hr=pMixerBitmap->SetAlphaBitmap(&ab);
pMixerBitmap->Release();
pGetService->Release();
if (FAILED(hr)) {
::SelectObject(m_hdc,m_hbmOld);
return false;
}
return true;
}
