LJp2FileFormat::ReadCompositeMemory

#include "ltwrappr.h"

L_INT LJp2FileFormat::ReadCompositeMemory(pBuffer, uBufferSize, pComposite, nBitsPerPixel, nOrder, pLoadOptions, pFileInfo, pReadCallBack, pUserData)

L_UINT8 * pBuffer;

pointer to a JPEG 2000 file in memory

L_SIZE_T uBufferSize;

the size of JPEG 2000 file in bytes

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 (Color, Opacity and Pre-multiplied opacity) stored in the specified JPEG 2000 file in memory.

Parameter Description
pBuffer Pointer to a JPEG 2000 file in memory.
uBufferSize Size of JPEG 2000 file in bytes.
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::ReadCompositeMemory loads all frames bitmaps stored in the specified JPEG 2000 file in memory (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.

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