LJp2FileFormat::ReadListMemory

Summary

Creates a bitmap list and loads all frames (images) stored in JPEG 2000 file in memory.

Syntax

#include "ltwrappr.h"

L_INT LJp2FileFormat::ReadListMemory(pBuffer, uBufferSize, phList, nBitsPerPixel, nOrder, pLoadOptions, pFileInfo, pReadCallBack, pUserData)

Parameters

L_UINT8 * pBuffer

Pointer to a JPEG 2000 file in memory.

L_SIZE_T uBufferSize

Size of the JPEG 2000 file in bytes.

pHBITMAPLIST phList

Address of the HBITMAPLIST variable for the new list.

L_INT nBitsPerPixel

Resulting bitmap pixel depth. If zero [0], the bitmap will have the original files pixel depth (do not convert).

L_INT nOrder

The desired color order. Possible values are:

Value	Meaning
ORDER_RGB	[0] Read-green-blue order.
ORDER_BGR	[1] Blue green-red order.
ORDER_GRAY	[2] 12 or 16-bit grayscale image. 12 and 16-bit grayscale images are supported in Document/Medical imaging products only.
0	The data is 8 bits per pixel or less.
ORDER_RGBORGRAY	[3] Load the image as red, green, blue, OR as a 12 or 16-bit grayscale image. 12 and 16-bit grayscale images are supported in Document/Medical imaging products only.
ORDER_BGRORGRAY	[4] Load the image as blue, green, red, OR as a 12 or 16-bit grayscale image. 12 and 16-bit grayscale images are supported in Document/Medical imaging products only.
ORDER_ROMM	[5] ROMM order. ROMM only supports 24 and 48-bit images.
ORDER_BGRORGRAYORROMM	[6] Load the image as blue, green, red, OR as a 12 or 16-bit grayscale image OR as ROMM. 12 and 16-bit grayscale images are supported in Document/Medical imaging products only.

pLOADFILEOPTION pLoadOptions

Pointer to optional extended load options. Pass NULL to use the default load options.

pFILEINFO pFileInfo

Pointer to a FILEINFO structure. If nothing is known about the file pass NULL.

LFile::LoadFileCallBack pReadCallBack

Optional callback function for additional processing.

If you do not provide a callback function, pass NULL.

If you do provide a callback function, use the function pointer as the value of this parameter.

The callback function must adhere to the function prototype described in the LFile::LoadFileCallBack function.

L_VOID * pUserData

Void pointer that you can use to pass one or more additional parameters used by the callback function.

Returns

Value	Meaning
SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

LJp2FileFormat::ReadListMemory creates a bitmap list and loads all frames (images) stored in JPEG 2000 file in memory. If any of the layers has opacity channels it will be applied on the list bitmap unless the ELO_COLOR_COMPONENT_ONLY flag is set in pLoadOptions. All of the engines boxes will be reset and updated with the new loaded boxes only.

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.