/** 
 * Decode the Base64-encoded string to get logo resources.
 */
HRESULT RecipeThumbnailProvider::GetLogoFromString(LPCWSTR encodedString, UINT* width, UINT* height, PBYTE* rawPixels)
{
	IStream* pImageStream = NULL;
	HRESULT hr = E_FAIL;
	DWORD dwDecodedImageSize = 0;
	DWORD dwSkipChars = 0;
	DWORD dwActualFormat = 0;

	if (CryptStringToBinary(encodedString, NULL, CRYPT_STRING_BASE64, NULL, &dwDecodedImageSize, &dwSkipChars, &dwActualFormat))
	{
		BYTE* pbDecodedImage = static_cast<BYTE*>(LocalAlloc(LPTR, dwDecodedImageSize));
		if (pbDecodedImage)
		{
			if (CryptStringToBinary(encodedString, lstrlen(encodedString), CRYPT_STRING_BASE64, pbDecodedImage, &dwDecodedImageSize, &dwSkipChars, &dwActualFormat))
			{
				pImageStream = SHCreateMemStream(pbDecodedImage, dwDecodedImageSize);
				if (pImageStream != NULL)
				{
					IWICImagingFactory* pImageFactory;
					hr = CoCreateInstance(CLSID_WICImagingFactory, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pImageFactory));
					LOGINFO(L"CoCreateIntance() returns 0x%x", hr);
					if (SUCCEEDED(hr))
					{
						IWICBitmapDecoder* pDecoder;
						hr = pImageFactory->CreateDecoderFromStream(pImageStream, &GUID_VendorMicrosoft, WICDecodeMetadataCacheOnDemand, &pDecoder);
						if (SUCCEEDED(hr))
						{
							IWICBitmapFrameDecode* pBitmapFrameDecode;
							hr = pDecoder->GetFrame(0, &pBitmapFrameDecode);
							if (SUCCEEDED(hr))
							{
								IWICBitmapSource* pBitmapSourceConverted = NULL;
								WICPixelFormatGUID guidPixelFormatSource;
								hr = pBitmapFrameDecode->GetPixelFormat(&guidPixelFormatSource);
								if (SUCCEEDED(hr) && (guidPixelFormatSource != GUID_WICPixelFormat24bppBGR))
								{
									IWICFormatConverter* pFormatConverter;
									hr = pImageFactory->CreateFormatConverter(&pFormatConverter);
									if (SUCCEEDED(hr))
									{
										hr = pFormatConverter->Initialize(pBitmapFrameDecode, GUID_WICPixelFormat24bppBGR, WICBitmapDitherTypeNone, NULL, 0, WICBitmapPaletteTypeCustom);
										if (SUCCEEDED(hr))
										{
											hr = pFormatConverter->QueryInterface(&pBitmapSourceConverted);
										}
										pFormatConverter->Release();
									}
								}
								else
								{
									hr = pBitmapFrameDecode->QueryInterface(&pBitmapSourceConverted);
								}
								if (SUCCEEDED(hr))
								{
									hr = pBitmapSourceConverted->GetSize(width, height);
									if (SUCCEEDED(hr))
									{
										WICRect rect = { 0, 0, *width, *height };
										*rawPixels = static_cast<BYTE*>(LocalAlloc(LPTR, (*width)*(*height)*3));
										hr = pBitmapSourceConverted->CopyPixels(&rect, (*width) * 3, (*width)*(*height) * 3, *rawPixels);
									}
									else
									{
										*width = 0;
										*height = 0;
										*rawPixels = NULL; 
									}
									pBitmapSourceConverted->Release();
								}
								pBitmapFrameDecode->Release();
							}
							pDecoder->Release();
						}
						pImageFactory->Release();
					}
					pImageStream->Release();
				}
			}
		}

		LocalFree(pbDecodedImage);
	}
	return hr;
}