ToRasterImage Method

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public RasterImage ToRasterImage()

'Declaration
 
Public Function ToRasterImage() As RasterImage

'Usage
 
Dim instance As RasterRenderBuffer
Dim value As RasterImage
 
value = instance.ToRasterImage()

public RasterImage ToRasterImage()

 function Leadtools.Converters.RasterRenderBuffer.ToRasterImage()

public:
RasterImage^ ToRasterImage();

Return Value

The Leadtools.RasterImage object created.

The Leadtools.RasterImage returned will have the same width, height, color order and bits per pixel specified in Width, Height, Order and BitsPerPixel.

The image data are copied into the Leadtools.RasterImage.

You can use this method to quickly convert a Windows Runtime WriteableBitmap or HTML ImageData to a LEADTOOLS Leadtools.RasterImage object.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

RasterImageRendererExamples.prototype.RasterImageRendererExample = function () {

   // Assume myCanvas is a Canvas on the page that has an image

   // Get the canvas
   var myCanvas = document.getElementById("myCanvas");
   var context = myCanvas.getContext("2d");

   // Get the ImageData
   var imageData = context.createImageData(myCanvas.width, myCanvas.height);
   var pixelData = imageData.data;

   var width = imageData.width;
   var height = imageData.height;

   // Create a RasterRenderBuffer from the image data
   var destRect = Leadtools.LeadRectHelper.create(0, 0, width, height);
   var renderBuffer = Leadtools.Converters.RasterRenderBuffer.createFromHtmlImageData(imageData.width, imageData.height, pixelData);

   // Create a RasterImage from it
   var rasterImage = renderBuffer.toRasterImage();

   // Save it
   var createFileAsync = Windows.ApplicationModel.Package.current.installedLocation.createFileAsync("Assets\\RasterImage.png", Windows.Storage.CreationCollisionOption.replaceExisting).then(
      function (createFileAsyncResult) {
         var codecs = new Leadtools.Codecs.RasterCodecs();
         var leadStream = Leadtools.LeadStreamFactory.create(createFileAsyncResult);
         codecs.saveAsync(rasterImage, leadStream, Leadtools.RasterImageFormat.Png, 32);
      });
}

public async void RasterRenderBufferToRasterImageExample()
{
   string srcFileName = @"Assets\Ocr1.tif";
   string destFileName = @"ToRasterImage.png";
   // Load the source image
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   IRandomAccessStream loadStream = await loadFile.OpenReadAsync();
   WriteableBitmap bitmap = new WriteableBitmap(1, 1);
   bitmap.SetSource(loadStream);

   // Create a RasterRenderBuffer object for the bitmap
   RasterRenderBuffer renderBuffer = RasterRenderBuffer.CreateFromWriteableBitmap(bitmap.PixelWidth, bitmap.PixelHeight, bitmap.PixelBuffer);

   // Create a raster image from it and save it
   using (RasterImage rasterImage = renderBuffer.ToRasterImage())
   {
      StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName, CreationCollisionOption.ReplaceExisting);
      ILeadStream saveStream = LeadStreamFactory.Create(saveFile);
      using (IDisposable leadStreamDisposable = saveStream as IDisposable)
      {
         using (RasterCodecs codecs = new RasterCodecs())
         {
            await codecs.SaveAsync(rasterImage, saveStream, RasterImageFormat.Png, 32);
         }
      }
   }
}

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

RasterRenderBuffer Class
RasterRenderBuffer Members