LJp2FileFormat::ReadGMLData

#include "ltwrappr.h"

L_INT LJp2FileFormat::ReadGMLData(pFileName, pGMLData)

L_TCHAR * pFileName;	JPEG 2000 file name
pL_JP2_GMLDATA pGMLData;	pointer to the L_JP2_GMLDATA structure

Reads GML data stored in a JPEG 2000 file.

Parameter	Description
pFileName	Character string that contains the name of the JPEG 2000 file.
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::ReadGMLData reads GML data stored in a JPEG 2000 file. 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.

Example

This example reads GML data stored in JPEG 2000 file format

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
L_INT LJp2FileFormat__ReadGMLDataExample(L_VOID) 
{ 
   LJp2FileFormat Engine; 
   L_JP2_GMLDATA GMLData; 
   L_INT nRet = 0; 
   /*Read GML data*/ 
   GMLData.uStructSize = sizeof(L_JP2_GMLDATA); 
   nRet = Engine.ReadGMLData(MAKE_IMAGE_PATH(TEXT("image1.jpx")), &GMLData); 
   if(nRet != SUCCESS) 
      return nRet; 
   /*Free GML data*/ 
   nRet = Engine.FreeGMLData( &GMLData); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
}

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Summary of Features

Functions:	LJp2FileFormat::FreeGMLData, LJp2FileFormat::ReadGMLDataMemory, 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