LJp2FileFormat::ReadComposite

#include "ltwrappr.h"

L_INT LJp2FileFormat::ReadComposite(pszFile, pComposite, nBitsPerPixel, nOrder, pLoadOptions, pFileInfo, pReadCallBack, pUserData)

L_TCHAR * pszFile;	/* JPEG 2000 file name */
pL_JP2_JPXCOMPOSITE pComposite;	/* pointer to a L_JP2_JPXCOMPOSITE structure */
L_INT nBitsPerPixel;	/* resulting bitmaps pixel depth */
L_INT nOrder;	/* desired color order */
pLOADFILEOPTION pLoadOptions;	/* pointer to optional extended load options */
pFILEINFO pFileInfo;	/* pointer to a structure */
LFile::LoadFileCallBack pReadCallBack;	/* optional callback function */
L_VOID * pUserData;	/* pointer to more parameters for the callback */

Loads all frames bitmaps stored in the specified JPEG 2000 file (Color, Opacity and Pre-multiplied opacity).

Parameter	Description
pszFile	Character string that contains the name of the JPEG 2000 file.
pComposite	Pointer to the L_JP2_JPXCOMPOSITE structure that references L_JP2_JPXBITMAPS bitmaps to be filled with image data.
nBitsPerPixel	Resulting bitmap pixel depth. If zero [0], the bitmap will have the original files pixel depth (do not convert).
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.
pLoadOptions	Pointer to optional extended load options. Pass NULL to use the default load options.
pFileInfo	Pointer to a FILEINFO structure. If nothing is known about the file pass NULL.
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.
pUserData	Void pointer that you can use to pass one or more additional parameters used by the callback function.

Returns

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

Comments

LJp2FileFormat::ReadComposite loads all frames bitmaps stored in the specified JPEG 2000 file (Color, Opacity and Pre-multiplied opacity). You must free this structure by calling the LJp2FileFormat::FreeComposite function. Also you must free structure bitmaps by calling the LBitmapBase::Free function. 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.

Platforms

Win32, x64.

Functions:	LJp2FileFormat::Read, LJp2FileFormat::ReadList, LJp2FileFormat::ReadFrames, LJp2FileFormat::Save, LJp2FileFormat::SaveList, LJp2FileFormat::SaveComposite, LJp2FileFormat::AppendFrames
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