LEADFILECOMMENT

typedef struct _LEADFILECOMMENT 
{ 
   L_UINT uType; 
   L_UINT uDataSize; 
   L_SIZE_T uDataOffset; 
}LEADFILECOMMENT, *pLEADFILECOMMENT;

The LEADFILECOMMENT structure contains information about a file comment field. A pointer to an array of this structure is obtained by the L_ReadFileComments function.

Member	Data Type	Description
uType	L_UINT	The type of this item comment. Valid values are:
		Value	Meaning
		JPEG and LEAD File Comments
		Tiff File Comments
		Exif File Comments
		Gif File Comments
		Dicom File Comments
		FlashPix File Comments
		CMNT_LAST	Last defined number for comments. To clear all fields, you can use the type constant as a loop counter. The first constant is 0 and the last is CMNT_LAST.
uDataSize	L_UINT	The number of bytes in the data items.
uDataOffset	L_SIZE_T	Byte offset into the ppData variables where the data for this item starts. To read the data for this item, you can use pItemData = (ppData + uDataOffset)

Comments

pLEADFILECOMMENT is a pointer to a LEADFILECOMMENT structure. Where the function parameter type is pLEADFILECOMMENT, you can declare a LEADFILECOMMENT variable, update the structure's fields, and pass the variable's address in the parameter. Declaring a pLEADFILECOMMENT variable is necessary only if your program requires a pointer.

Pass an address to pLEADFILECOMMENT to L_ReadFileComments to read all the comment fields stored in an image file. These functions will allocate this pointer with an array of pLEADFILECOMMENT structures, one for each item found. When you are done using the pLEADFILECOMMENT pointer, you must pass it to the L_FreeFileComments function to free the allocated memory.

Help Version 19.0.2017.10.27

Products | Support | Contact Us | Copyright Notices
© 1991-2017 LEAD Technologies, Inc. All Rights Reserved.

LEADTOOLS Raster Imaging C API Help

Introduction

Version History

Getting Started

LEADTOOLS Raster Imaging Features

Redistributables/Files To Be Included With Your Application