HistDIBComplement

#include "BIFILTER.H"

 

HANDLE CALLBACK HistDIBComplement(                     HANDLE      hSrcDIB,
int                 iShowProgress,
HWND        hParent)

Description

This function creates negatives from the source image. The result is put to a newly created DIB and the source DIB is unmodified. It works with 1, 4, 8 or 24 bits/pixel. In case of 24 bits/pixel, the operation is made separately on the R, G, B channels. In case of 4 or 8 bits/pixel, the source DIB must contain grayscale image and the palette values in the source DIB must be monotone increasing.

Parameters

HANDLE

hSrcDIB

Source DIB

int

iShowProgress

This parameter specifies the displaying of the progressbar and the preview dialog.

Available values:

DISPLAY_NONE (0)      -     The progressbar and the preview dialog will not display before filtering.

DISPLAY_PROGRESS (1) -The progressbar will display during filtering procedure.

DISPLAY_DIALOG (2) -     The preview dialog will display before filtering. This dialog shows the part of the image before and after filtering.

DISPLAY_BOTH (3)      -     The progressbar and the preview dialog will display.

IMPORTANT: The preview dialog will only display, if there is BiDlgs.dll installed.

HWND

hParent

Handler of the parent window.

Return values

Handle of the newly created DIB on success or NULL on failure.

Programming notes

Result pixel value = Maximum pixel value - Source pixel value. Maximum pixel values: 1 bits/pixel: 1,   4 bits/pixel: 15,   8 bits/pixel: 255,   24 bits/pixel: 255 for each channel. There are three channels on 24 bits/pixel (R, G, B).

Requirements

Header :    Declared in BIFilter.h; include BIFilter.h.

Library :    Use BIFilter.lib.

DLLs :       BIFilter.dll.