LJp2FileFormat::ReadGMLDataMemory

#include "ltwrappr.h"

L_INT LJp2FileFormat::ReadGMLDataMemory(pBuffer, uBufferSize, pGMLData)

L_UINT8 * pBuffer;

pointer to a JPEG 2000 file in memory

L_SIZE_T uBufferSize;

file size in bytes

pL_JP2_GMLDATA pGMLData;

pointer to the L_JP2_GMLDATA structure

Reads GML data stored in a JPEG 2000 file in memory.

Parameter

Description

pBuffer

Pointer to a JPEG 2000 file in memory.

uBufferSize

Size of the JPEG 2000 file in bytes.

pGMLData

Pointer to the L_JP2_GMLDATA structure that is filled by GML data stored in the file.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

LJp2FileFormat::ReadGMLDataMemory reads GML data stored in a JPEG 2000 file in memory. You must free this structure by calling the LJp2FileFormat::FreeGMLData function.

Required DLLs and Libraries

LTJP2
LFJ2K
LTIMGEFX

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64.

See Also

Functions:

LJp2FileFormat::FreeGMLData, LJp2FileFormat::ReadGMLData, LJp2FileFormat::AppendGMLData, LJp2FileFormat::AppendGMLDataMemory

Topics:

Implementing JPEG 2000 Features

 

Raster Image Functions: Working with JPEG 2000

 

Programming with JPX Features

 

JPX File Comments

 

Raster Image Functions: Working with JPX

Example

This example reads GML data stored in JPEG 2000 file format

L_INT LJp2FileFormat__ReadGMLDataMemoryExample(L_UINT8* pFileBuffer, L_SIZE_T uFileSize) 
{ 
   LJp2FileFormat Engine; 
   L_JP2_GMLDATA GMLData; 
   L_INT nRet = 0; 
 
   /*Read GML data*/ 
   GMLData.uStructSize = sizeof(L_JP2_GMLDATA); 
   nRet = Engine.ReadGMLDataMemory( pFileBuffer, uFileSize, &GMLData); 
   if(nRet != SUCCESS) 
     return nRet; 
 
   /*Free GML data*/ 
   nRet = Engine.FreeGMLData( &GMLData); 
   if(nRet != SUCCESS) 
      return nRet; 
    
   return SUCCESS; 
} 

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