ReadLoadResolutions(Stream) Method

Summary

Examines a stream to determine which resolutions it contains.

Syntax

Objective-C

C++/CLI

Java

Python

public LeadSize[] ReadLoadResolutions( 
   Stream stream 
)

- (nullable NSArray<NSValue/*CGSize*/ *> *)loadResolutionsForStream:(LTLeadStream *)stream error:(NSError **)error

public LeadSize[] readLoadResolutions(ILeadStream stream)

public: 
array<LeadSize>^ ReadLoadResolutions(  
   Stream^ stream 
)

def ReadLoadResolutions(self,stream):

Parameters

stream
A Stream containing the data of the image file to query.

Return Value

A LeadSize structure containing the available resolutions.

Remarks

A FlashPix, PhotoCD, JPEG 2000 or JBIG/JBIG2 file can contain more than one copy of the same image, each at a different physical resolution (width and height in pixels).

After you get the available resolutions, you can use any of the following to specify the one to be loaded:

For more information, refer to Implementing JBIG Features.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
void ReadLoadResolutionsExample(string jbigFileName) 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   // Get the number of resolutions (sizes) available in this file 
   LeadSize[] resolution = codecs.ReadLoadResolutions(jbigFileName); 
   if (resolution.Length > 0) 
   { 
      Debug.WriteLine("{0} resolutions available", resolution.Length); 
      for (int i = 0; i < resolution.Length; i++) 
         Debug.WriteLine("{0} by {1}", resolution[i].Width, resolution[i].Height); 
 
      // Set the size to load, the smallest size in this case */ 
      codecs.Options.Jpeg2000.Load.J2kResolution = resolution[0]; 
 
      // Get the info in of the image to show its original size 
      CodecsImageInfo info = codecs.GetInformation(jbigFileName, false); 
      Debug.WriteLine("Size of image according to GetInformation is {0} by {1}", info.Width, info.Height); 
 
      // Load the image, keeping the bits per pixel of the file 
      RasterImage image = codecs.Load(jbigFileName); 
      Debug.WriteLine("Size of image loaded is {0} by {1}", image.Width, image.Height); 
 
      image.Dispose(); 
   } 
   else 
      Debug.WriteLine("No resolutions found"); 
 
   // Clean up 
   codecs.Dispose(); 
}

Requirements

Target Platforms

Reference

RasterCodecs Class

RasterCodecs Members

Overload List

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Help Version 22.0.2023.5.5

Leadtools.Codecs Assembly

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