GetRowCompressed(byte[],ushort[],int,int,int) Method

Summary

Retrieves one or more rows of 1-bit compressed data from an image that has been loaded in its compressed format.

Syntax

Objective-C

C++/CLI

Java

Python

[CLSCompliantAttribute(false)] 
public void GetRowCompressed( 
   byte[] workBuffer, 
   ushort[] runBuffer, 
   int runBufferOffset, 
   int row, 
   int lines 
)

- (BOOL)getRowCompressed:(unsigned char *)workBuffer  
               runBuffer:(unsigned short *)runBuffer  
                     row:(NSUInteger)row  
                   lines:(NSUInteger)lines  
                   error:(NSError **)error

public void getRowCompressed( 
  byte[] workBuffer,  
  short[] runBuffer,  
  int runBufferOffset,  
  int row,  
  int lines 
)

[CLSCompliantAttribute(false)] 
public: 
void GetRowCompressed(  
   array<byte>^ workBuffer, 
   array<ushort>^ runBuffer, 
   int runBufferOffset, 
   int row, 
   int lines 
)

def GetRowCompressed(self,workBuffer,runBuffer,runBufferOffset,row,lines):

Parameters

workBuffer
Optional work buffer. Allocating the work buffer speeds processing if you call this method more than once, because if you do not allocate a work buffer, the method allocates and frees a temporary buffer each time it is called. bytes required = lines * ((RasterImage-Width.html) + 3) * 2). Pass a null reference to runBuffer if you do not want to use a work buffer.

runBuffer
The output buffer, which will be filled with 1-bit compressed image data.

runBufferOffset
Offset into runBuffer where the copy operation should start.

row
The number of the row to retrieve. The first row is 0, and the last row is 1 less than the image height.

lines
Number of rows to retrieve.

Remarks

This method is available in the (Document/Medical only) Toolkits.

This method is useful for working with 1-bit images that are loaded in their compressed formats for faster loading and display.

For more information, refer to Speeding Up 1-Bit Documents.

Example

This example demonstrates the low-level methods for accessing 1-bit compressed image data. It demonstrates the ability to get and put rows, and the ability to process rows in buffer-to-buffer processing. The result of the function is an the first 50 lines are inverted.

Requirements

Target Platforms

Reference

RasterImage Class

RasterImage Members

Overload List

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Help Version 23.0.2024.5.22

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies