This structure is used by the IG_gui_ip_contrast_dlg function to adjust the contrast of the image using different methods.
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typedef struct tag AT_IGGUI_IP_CONTRAST
{
DWORD cbSize;
UINT uFlags;
HIGEAR hIGear;
HWND hWnd;
LPCHAR lpszTitle;
AT_RECT rc;
UINT nContrastType;
AT_MODE nMode;
DOUBLE dblContrast;
DOUBLE dblBrightness;
DOUBLE dblGamma;
AT_ERRCOUNT nErrCount;
LPFNIGGUI_IP_UPDATE lpfnUpdateProc;
}AT_IGGUI_IP_CONTRAST;
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Name | Type | Description |
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cbSize | DWORD | Specifies the length, in bytes, of the structure. |
uFlags | UINT | A set of bit flags you can use to initialize the dialog box. |
hIGear | HIGEAR | A handle of an image. |
hWnd | HWND | A handle of the window to update. |
lpszTitle | LPCHAR | A dialog title. |
rc | AT_RECT | An AT_RECT struct specifying the rectangular portion of the image on which to operate. |
nContrastType | UINT | A type of a contrast operation (see IG_IGGUI_IP_CONTRAST_ constants). |
nMode | AT_MODE | IG_CONTRAST_PIXEL or IG_CONTRAST_PALETTE, indicating whether to adjust by altering the pixels themselves, or the palette. |
dblContrast | DOUBLE | A value from -255.0 to +255.0, the adjustment in contrast. |
dblBrightness | DOUBLE | A value from - 255.0 to +255.0, the adjustment in brightness. |
dblGamma | DOUBLE | A value greater than 0.0. The normal range is from 0.75 to 3.0. |
nErrCount | AT_ERRCOUNT | The number of ImageGear errors that occurred during this function call. |
lpfnUpdateProc | LPFNIGGUI_IP_UPDATE | A pointer to the function that is called when the 'Apply' button is clicked. |