StartOptimizedLoad Method

C#
Visual Basic
WinRT C#
Java
Objective-C
WinRT JavaScript
C++

public void StartOptimizedLoad()

'Declaration

Public Sub StartOptimizedLoad()

'Usage

Dim instance As RasterCodecs
 
instance.StartOptimizedLoad()

public void StartOptimizedLoad()

 function Leadtools.Codecs.RasterCodecs.StartOptimizedLoad()

public:
void StartOptimizedLoad();

Optimizes the load or conversion from a file with multiple pages. Call this method before a loop that involves loading from the same source file. Call StopOptimizedLoad when finished.

This method should be used only if the source file is the same and its contents is unchanged.

This method can greatly speed up a loop involving multiple GetInformation, Load or Convert methods for certain formats (for example, PDF files).

For more information, refer to Using the OptimizedLoad Functions to Speed Loading Large Files.

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

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Drawing
Imports Leadtools.Svg

      
Public Sub OptimizedLoadExample()
   Using codecs As RasterCodecs = New RasterCodecs()
      ' The speed improvement is most noticeable in source files with many pages
      Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "MultiPage.pdf")

      ' indicate the start of a loop from the same source file
      codecs.StartOptimizedLoad()

      For i As Integer = 1 To 10
         Using image As RasterImage = codecs.Load(srcFileName, i)
            Dim destFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "out_" + i.ToString() + ".jpg")
            ' Save as the destination image
            codecs.Save(image, destFileName, RasterImageFormat.Jpeg411, 24)
         End Using
      Next

      ' Indicate that I finished using the same source file.
      codecs.StopOptimizedLoad()
   End Using
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;
using Leadtools.Svg;

      
public void OptimizedLoadExample()
{
   using (RasterCodecs codecs = new RasterCodecs())
   {
      // The speed improvement is most noticeable in source files with many pages
      string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "MultiPage.pdf");
      // indicate the start of a loop from the same source file
      codecs.StartOptimizedLoad();

      for (int i = 1; i < 10; i++)
      {
         using (RasterImage image = codecs.Load(srcFileName, i))
         {
            string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "out_" + i.ToString() + ".jpg");
            // Save as the destination image
            codecs.Save(image, destFileName, RasterImageFormat.Jpeg411, 24);
         }
      }

      // Indicate that I finished using the same source file.
      codecs.StopOptimizedLoad();
   }
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

Target Platforms

Reference

RasterCodecs Class
RasterCodecs Members