LEAD XPS Encoder Options

Property Name	VARTYPE	Default Value	Applicable LEAD Encoders	Description
XResolution	VT_I4	96	XPS	Horizontal display resolution in dots per inch.
YResolution	VT_I4	96	XPS	Vertical display resolution in dots per inch.

 

Reference

LEAD WIC-Enabled Codecs Overview
Registering a LEAD WIC-Enabled Codec
LEAD Bitmap Encoder Property Bag
LEAD Bitmap Encoder Property Bag: Jpeg2000 Specific Options
LEAD Bitmap Encoder Property Bag: Jbig2 Specific Options

// This example shows how to save an XPS file with options using the property bag
// Then the file is saved with the following options:
// * XResolution: 300
// * YResolution: 300
// Refer to the Example Requirements for help in running this sample
HRESULT IWICLeadBitmapEncoder_PropertyBag_Xps(HWND hWnd, WCHAR *pszOut)
{
   HRESULT hr = S_OK;
   IWICImagingFactory *piImagingFactory = NULL;
   IWICBitmapEncoder *piBitmapEncoder = NULL;
   IWICBitmapFrameEncode *piBitmapFrameEncode = NULL;
   IWICStream *piStream = NULL;
   IPropertyBag2 *piPropertyBag = NULL;
   CString csExampleName;
   GUID guidContainerFormat = GUID_ContainerFormatLeadXps;
   WICPixelFormatGUID guidPixelFormat = GUID_WICPixelFormat24bppBGR;

   csExampleName.Format(L"IWICLeadBitmapEncoder_PropertyBag_Xps\nThis example creates an Xps file (%s) with XResolution 300, and YResolution 300", pszOut);

   // Create a LEAD Jpeg Bitmap Encoder
   IFS(CoCreateInstance(CLSID_WICImagingFactory, NULL, CLSCTX_INPROC_SERVER, IID_IWICImagingFactory, (LPVOID*) &piImagingFactory));

   IFS(piImagingFactory->CreateStream(&piStream));
   IFS(piStream->InitializeFromFilename(pszOut, GENERIC_WRITE));
   IFS(piImagingFactory->CreateEncoder(guidContainerFormat, NULL, &piBitmapEncoder));
   IFS(piBitmapEncoder->Initialize(piStream, WICBitmapEncoderNoCache));
   IFS(piBitmapEncoder->CreateNewFrame(&piBitmapFrameEncode, &piPropertyBag));

   // This is how you customize the a LEAD WIC Encoder property bag.
   if(SUCCEEDED(hr))
   {        
      ULONG uCount = 0;
      hr = piPropertyBag->CountProperties(&uCount);
      PROPBAG2 *pBag = new PROPBAG2[uCount];
      ZeroMemory(pBag, sizeof(*pBag));

      VARIANT *pValue = new VARIANT[uCount];
      ZeroMemory(pValue, sizeof(*pValue));

      HRESULT *pErrors = new HRESULT[uCount];
      ZeroMemory(pErrors, sizeof(*pErrors));

      IFS(piPropertyBag->GetPropertyInfo(0, uCount, pBag, &uCount));
      IFS(piPropertyBag->Read(uCount, pBag, NULL, pValue, pErrors));
      if (SUCCEEDED(hr))
      {
         for (ULONG u = 0; u < uCount; u++)
         {
            if (wcscmp(pBag[u].pstrName, L"XResolution")== 0)
            {
               pValue[u].uintVal = 300;
               piPropertyBag->Write(1, pBag+u, pValue+u);
            }
            if (wcscmp(pBag[u].pstrName, L"YResolution")== 0)
            {
               pValue[u].uintVal = 300;
               piPropertyBag->Write(1, pBag+u, pValue+u);
            }
        }
      }
      //Cleanup
      DELETE_POINTER(pBag);
      DELETE_POINTER(pValue);
      DELETE_POINTER(pErrors);

      IFS(piBitmapFrameEncode->Initialize(piPropertyBag));
   }

   // Now create the image data that we will write
   UINT uiWidth = 256;
   UINT uiHeight = 256;
   IFS(piBitmapFrameEncode->SetSize(uiWidth, uiHeight));
   WICPixelFormatGUID formatGUID = GUID_WICPixelFormat24bppBGR;
   IFS(piBitmapFrameEncode->SetPixelFormat(&formatGUID));

   if (SUCCEEDED(hr))
   {
      // We're expecting to write out 24bppRGB. Fail if the encoder cannot do it.
      hr = IsEqualGUID(formatGUID, GUID_WICPixelFormat24bppBGR) ? S_OK : E_FAIL;
   }

   if (SUCCEEDED(hr))
   {
      UINT cbStride = (uiWidth * 24 + 7)/8;
      UINT cbBufferSize = uiHeight * cbStride;
      BYTE *pbBuffer = new BYTE[cbBufferSize];

      if (pbBuffer != NULL)
      {
         for (UINT i = 0; i < cbBufferSize; i++)
         {
            pbBuffer[i] = static_cast<BYTE>(rand());
         }
         hr = piBitmapFrameEncode->WritePixels(uiHeight, cbStride, cbBufferSize, pbBuffer);
         delete[] pbBuffer;
      }
      else
      {
         hr = E_OUTOFMEMORY;
      }
   }

   // Commit the changes to the stream
   IFS(piBitmapFrameEncode->Commit());   
   IFS(piBitmapEncoder->Commit());

   RELEASE_INTERFACE(piBitmapFrameEncode);
   RELEASE_INTERFACE(piBitmapEncoder);
   RELEASE_INTERFACE(piImagingFactory);
   RELEASE_INTERFACE(piPropertyBag);
   RELEASE_INTERFACE(piStream);

   MessageBox(hWnd, csExampleName, csExampleName, MB_OK);
   return hr;
}