C++ (Cpp) IWICImagingFactory::CreateBitmapFromHBITMAP Examples

Example #1

File: MainWindow.cpp Project: dbremner/Win7_SDK_Samples

HRESULT CMainWindow::DecodeImageFromThumbCache(
    IShellItem *pShellItem,
    ID2D1Bitmap **ppBitmap
    )
{
    const UINT THUMB_SIZE = 256;

    // Read the bitmap from the thumbnail cache

    IThumbnailCache *pThumbCache;
    HRESULT hr = CoCreateInstance(
        CLSID_LocalThumbnailCache,
        NULL,
        CLSCTX_INPROC_SERVER,
        IID_PPV_ARGS(&pThumbCache)
        );
    if (SUCCEEDED(hr))
    {
        ISharedBitmap *pBitmap;
        hr = pThumbCache->GetThumbnail(
            pShellItem,
            THUMB_SIZE,
            WTS_SCALETOREQUESTEDSIZE,
            &pBitmap,
            NULL,
            NULL
            );
        if (SUCCEEDED(hr))
        {
            HBITMAP hBitmap;
            hr = pBitmap->GetSharedBitmap(
                &hBitmap
                );
            if (SUCCEEDED(hr))
            {
                // Create a WIC bitmap from the shared bitmap

                IWICImagingFactory *pFactory;
                hr = CoCreateInstance(
                    CLSID_WICImagingFactory,
                    NULL,
                    CLSCTX_INPROC_SERVER,
                    IID_PPV_ARGS(&pFactory)
                    );
                if (SUCCEEDED(hr))
                {
                    IWICBitmap *pWICBitmap;
                    hr = pFactory->CreateBitmapFromHBITMAP(
                        hBitmap,
                        NULL,
                        WICBitmapIgnoreAlpha,
                        &pWICBitmap
                        );
                    if (SUCCEEDED(hr))
                    {
                        // Create a D2D bitmap from the WIC bitmap

                        hr = m_pRenderTarget->CreateBitmapFromWicBitmap(
                            pWICBitmap,
                            NULL,
                            ppBitmap
                            );
                        pWICBitmap->Release();
                    }

                    pFactory->Release();
                }
            }
            
            pBitmap->Release();
        }
        
        pThumbCache->Release();
    }

    return hr;
}