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;
}