Load(Stream,int) Method (original) (raw)
Summary
Loads the specified page from an image stream using default options.
Syntax
C#
Objective-C
C++/CLI
Java
Python
- (nullable LTRasterImage *)loadStream:(LTLeadStream *)_stream_
pageNumber:(NSInteger)_pageNumber_
error:(NSError **)error
public RasterImage load(ILeadStream stream, int PageNumber) Parameters
stream
A Stream containing the image data to load.
pageNumber
1-based index to the page number to load.
Return Value
The RasterImage object that this method loads.
Example
This example will query the number of pages from a URI and then load them.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
using Leadtools.Svg;
public void LoadPagesFromStreamTest()
{
// Create a new RasterCodecs instance
using (RasterCodecs rasterCodecs = new RasterCodecs())
{
Stream stream = File.OpenRead(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"));
RasterImageFormat rasterImageFormat = rasterCodecs.GetFormat(stream);
int totalPages = rasterCodecs.GetTotalPages(stream);
// Using extensions in RasterCodecsExtensions
// GetInformationAsync is used to get CodecsImageInfo
using (ILeadStream outputLeadStream = LeadStream.Factory.FromStream(stream))
{
//Using GetInformationAsync to obtain the format data as CodecsImageInfo, instead of the internal GetFormatAsync
Task<CodecsImageInfo> task = rasterCodecs.GetInformationAsync(outputLeadStream, true);
CodecsImageInfo codecsImageInfo = task.Result;
//Get task data
Debug.WriteLine($"Task ID: {task.Id}");
Debug.WriteLine($"Is a Document File: {task.Result.Document.IsDocumentFile}");
Debug.WriteLine($"codecsImageInfo Palette: {codecsImageInfo.GetPalette()}");
// Get total pages using TotalPages instead of GetTotalPagesAsync
Debug.WriteLine($"Total Pages: {task.Result.TotalPages}");
}
// Get the number of pages
int pageCount = rasterCodecs.GetTotalPages(stream);
Debug.WriteLine("Number of pages in the file is {0}", pageCount);
// Load all pages
for (int pageNumber = 1; pageNumber <= pageCount; pageNumber++)
{
using (RasterImage rasterImage = rasterCodecs.Load(stream, pageNumber))
{
Debug.WriteLine("Page {0} loaded", pageNumber);
}
}
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}
Leadtools.Codecs Assembly
CompactFile(Stream,Stream,int,int,bool,int,int,bool,int,CodecsSavePageMode,bool,bool) Method
CompactFile(Stream,Stream,int,int,bool,long,int,bool,long,CodecsSavePageMode,bool,bool,bool) Method
CompactFile(string,string,int,int,bool,int,int,bool,int,CodecsSavePageMode,bool,bool) Method
CompactFile(string,string,int,int,bool,long,int,bool,long,CodecsSavePageMode,bool,bool,bool) Method