L_Jp2ReadCompositeMemory

#include "l_bitmap.h"

L_LTJP2_API L_INT EXT_FUNCTION L_Jp2ReadCompositeMemory(hJp2, pBuffer, uBufferSize, pComposite, nBitsPerPixel, nOrder, pLoadOptions, pFileInfo, pReadCallBack, pUserData)

L_HJP2 hJp2;

JPEG 2000 engine handle

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

FILEREADCALLBACK 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
hJp2 JPEG 2000 engine handle that was created by the L_Jp2Create function.
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 and 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 and 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 and 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. 12- and 16-bit grayscale images are supported in Document and 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 FILEREADCALLBACK 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

L_Jp2ReadCompositeMemory 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 L_Jp2FreeComposite function. Also you must free structure bitmaps by calling the L_FreeBitmap 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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