Leadtools.Codecs Namespace > RasterCodecs Class > Load Method : Load(Stream) Method |
public RasterImage Load( Stream stream )
'Declaration Public Overloads Function Load( _ ByVal stream As Stream _ ) As RasterImage
'Usage Dim instance As RasterCodecs Dim stream As Stream Dim value As RasterImage value = instance.Load(stream)
public RasterImage Load( Stream stream )
-(LTRasterImage*)load:(LTLeadStream*)stream error:(NSError**)outError;
public RasterImage load(ILeadStream stream)
function Leadtools.Codecs.RasterCodecs.Load(Stream)( stream )
public: RasterImage^ Load( Stream^ stream )
The stream can point to any supported image file format and bits per pixel, whether compressed or uncompressed.
This method will load all the pages in a multipage file. The resulting image will have the same bits/pixel and color order value of the image as it was stored in the stream.
LEADTOOLS will attempt to load corrupted files so you can see at least a portion of the image. For these images, the load methods succeed, but LoadStatus will return an error code.
Use the CodecsLoadOptions class to set up other load option parameters before calling this method.
Support for 12 and 16-bit grayscale, and 48 and 64-bit color images is only available in the Document/Medical Imaging editions.
For supported formats, refer to Summary of All Supported Image File Formats.
LEADTOOLS loads all PDF files as Raster PDF uncompressed RasterImageFormat.RasPdf, regardless of the compression and color space used when saving the file.
The CodecsLoadOptions.AllPages property controls whether RasterCodecs will try to load all pages or just the first page if the image data contains multiple pages. To load a single page from a stream, use Load(Stream stream, int pageNumber).
Imports Leadtools Imports Leadtools.Codecs Imports Leadtools.ImageProcessing Imports Leadtools.ImageProcessing.Color Imports Leadtools.Drawing Public Sub LoadStream1Example() Dim codecs As RasterCodecs = New RasterCodecs() Dim singlePageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp") Dim multiPageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Eye.gif") ' Load the file into a stream Dim fs As FileStream = File.OpenRead(singlePageFileName) ' Get the file information (we are interested in the number of pages) Dim info As CodecsImageInfo = codecs.GetInformation(fs, True) Console.WriteLine("Number of pages according to info: {0}", info.TotalPages) ' Load the image and verify that we loaded all the pages Dim image As RasterImage = codecs.Load(fs) Console.WriteLine("Number of pages loaded: {0}", image.PageCount) Debug.Assert(image.PageCount = info.TotalPages) image.Dispose() fs.Close() ' Repeat for a multipage file fs = File.OpenRead(multiPageFileName) info = codecs.GetInformation(fs, True) Console.WriteLine("Number of pages according to info: {0}", info.TotalPages) image = codecs.Load(fs) Console.WriteLine("Number of pages loaded: {0}", image.PageCount) Debug.Assert(image.PageCount = info.TotalPages) image.Dispose() fs.Close() ' Clean up codecs.Dispose() End Sub Public NotInheritable Class LEAD_VARS Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" End Class
using Leadtools; using Leadtools.Codecs; using Leadtools.ImageProcessing; using Leadtools.ImageProcessing.Color; public void LoadStream1Example() { RasterCodecs codecs = new RasterCodecs(); string singlePageFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); string multiPageFileName = Path.Combine(LEAD_VARS.ImagesDir, "Eye.gif"); // Load the file into a stream FileStream fs = File.OpenRead(singlePageFileName); // Get the file information (we are interested in the number of pages) CodecsImageInfo info = codecs.GetInformation(fs, true); Console.WriteLine("Number of pages according to info: {0}", info.TotalPages); // Load the image and verify that we loaded all the pages RasterImage image = codecs.Load(fs); Console.WriteLine("Number of pages loaded: {0}", image.PageCount); Debug.Assert(image.PageCount == info.TotalPages); image.Dispose(); fs.Close(); // Repeat for a multipage file fs = File.OpenRead(multiPageFileName); info = codecs.GetInformation(fs, true); Console.WriteLine("Number of pages according to info: {0}", info.TotalPages); image = codecs.Load(fs); Console.WriteLine("Number of pages loaded: {0}", image.PageCount); Debug.Assert(image.PageCount == info.TotalPages); image.Dispose(); fs.Close(); // Clean up codecs.Dispose(); } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; }
using Leadtools; using Leadtools.Codecs; using Leadtools.Examples; using Leadtools.ImageProcessing; using Leadtools.ImageProcessing.Color; using Leadtools.Windows.Media; public void LoadStream1Example(Stream inStreamSingleCmp, Stream inStreamMultiGif) { RasterCodecs codecs = new RasterCodecs(); // Get the file information (we are interested in the number of pages) CodecsImageInfo info = codecs.GetInformation(inStreamSingleCmp, true); Debug.WriteLine("Number of pages according to info: {0}", info.TotalPages); // Load the image and verify that we loaded all the pages RasterImage image = codecs.Load(inStreamSingleCmp); Debug.WriteLine("Number of pages loaded: {0}", image.PageCount); Debug.Assert(image.PageCount == info.TotalPages); image.Dispose(); // Repeat for a multipage file info = codecs.GetInformation(inStreamMultiGif, true); Debug.WriteLine("Number of pages according to info: {0}", info.TotalPages); image = codecs.Load(inStreamMultiGif); Debug.WriteLine("Number of pages loaded: {0}", image.PageCount); Debug.Assert(image.PageCount == info.TotalPages); image.Dispose(); }
Imports Leadtools Imports Leadtools.Codecs Imports Leadtools.ImageProcessing Imports Leadtools.ImageProcessing.Color Imports Leadtools.Windows.Media Public Sub LoadStream1Example(ByVal inStreamSingleCmp As Stream, ByVal inStreamMultiGif As Stream) Dim codecs As RasterCodecs = New RasterCodecs() ' Get the file information (we are interested in the number of pages) Dim info As CodecsImageInfo = codecs.GetInformation(inStreamSingleCmp, True) Debug.WriteLine("Number of pages according to info: {0}", info.TotalPages) ' Load the image and verify that we loaded all the pages Dim image As RasterImage = codecs.Load(inStreamSingleCmp) Debug.WriteLine("Number of pages loaded: {0}", image.PageCount) Debug.Assert(image.PageCount = info.TotalPages) image.Dispose() ' Repeat for a multipage file info = codecs.GetInformation(inStreamMultiGif, True) Debug.WriteLine("Number of pages according to info: {0}", info.TotalPages) image = codecs.Load(inStreamMultiGif) Debug.WriteLine("Number of pages loaded: {0}", image.PageCount) Debug.Assert(image.PageCount = info.TotalPages) image.Dispose() End Sub