Description This method makes an arithmetic operation on a device independent bitmap and a constant value. 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 arithmetic 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.
Syntax lRet = [BIFilter.]ArithmeticDIBConst Operation Dib Const iShowProgress hWnd
Remarks lRet LONGLONG Handle of the newly created DIB on success or 0 on failure.
Operation short Specify the operation.
Dib LONGLONG Source DIB.
Const Long Second argument of the operation.
iShowProgress short 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 BIDlgs32.dll installed.
hWnd LONGLONG Handler of the parent window.
Possible values of the Operation parameter:
0 OPER_ADD PixelResult = PixelSource1 + Const
1 OPER_SUB PixelResult = PixelSource1 - Const
2 OPER_MUL PixelResult = PixelSource1 * Const
3 OPER_DIV PixelResult = PixelSource1 / Const
4 OPER_AND PixelResult = PixelSource1 & Const
5 OPER_NAND PixelResult = ~(PixelSource1 & Const)
6 OPER_OR PixelResult = PixelSource1 | Const
7 OPER_NOR PixelResult = ~(PixelSource1 | Const)
8 OPER_XOR PixelResult = PixelSource1 ^ Const
9 OPER_MIN PixelResult = MIN (PixelSource1, Const)
10 OPER_MAX PixelResult = MAX (PixelSource1, Const)
11 OPER_EXP PixelResult = EXP (PixelSource1)
12 OPER_LOG PixelResult = LOG (PixelSource1)
See Also