pPDFCOMP_IMAGECALLBACK Function

#include "l_bitmap.h"
#include "lpdfComp.h"

L_INT pEXT_CALLBACK pPDFCOMP_IMAGECALLBACK (hDocument, nPage, pSegmentInfo, UserData)

LCPDF_HANDLE hDocument;

handle to an existing PDF document

L_INT nPage;

current page index

LPSEGMENTINFO pSegmentInfo;

pointer to the SEGMENTINFO structure

HANDLE UserData;

user data handle

This callback function is called every time a segment is added to the PDF document.

Parameter

Description

hDocument

Handle to an existing PDF document. This handle is obtained by calling the L_PdfCompInit function.

nPage

Index of the page on which the segment is being written. This is a zero-based index.

pSegmentInfo

Pointer to the SEGMENTINFO structure that contains the segment information.

UserData

Handle that you can use to access a variable or structure containing data that your callback function needs. This gives you a way to receive data indirectly from the function that uses this callback function. This is the same pointer that you pass in the UserData parameter of the L_PdfCompInit function.

 

Keep in mind that this is a void pointer, which must be cast to the appropriate data type within your callback function.

Returns

SUCCESS

To add the current segment and continue.

FAILURE

Do not add this segment. Continue to the next segment.

Comments

This call back is called each time an MRC segment is added to the PDF file in memory, by calling L_PdfCompInsertMRC.

The user should return SUCCESS to add the current segment and continue with the process, or FAILURE, to not add this segment and proceed with the next one.

Required DLLs and Libraries

LCPMRC
LCPPDF
LCPENC
LCZIB

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

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