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LBitmap::InvertedTextCallBack

Summary

Called for each inverted text segment found by LBitmap::InvertedText.

Syntax

#include "ltwrappr.h"

virtual L_INT LBitmap::InvertedTextCallBack(hRgn, pBoundingRect, iWhiteCount, iBlackCount)

Parameters

HRGN hRgn

Windows region representing the inverted text to be removed. It is the programmers responsibility to delete this region (using DeleteObject()) when it is no longer needed.

PRECT pBoundingRect

Pointer to a RECT structure that contains the bounding rectangle of the inverted text region being processed.

L_INT32 iWhiteCount

Total number of white pixels in the inverted text region being processed.

L_INT32 iBlackCount

Total number of black pixels in the inverted text region being processed.

Returns

Value	Meaning
SUCCESS_REMOVE	Invert the text.
SUCCESS_NOREMOVE	Do not invert the text.
Otherwise	An error occurred. Refer to Return Codes.

Comments

This function is called once for each area of inverted text that is detected. Return SUCCESS_REMOVE to have the area modified. Return SUCCESS_NOREMOVE to leave the area unchanged. Pass any other value to abort. This value will be the return value of the LBitmap::InvertedText(). If flags INVERTEDTEXT_IMAGE_UNCHANGED and INVERTEDTEXT _SINGLE_REGION are being used, then the return value of this function affects only the internal single region that contains all the changes.