This structure is used by the IG_gui_fx_posterize_dlg function to reduce the number of actual colors in the image by creating a "staircase" in the palette.
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typedef struct tag AT_IGGUI_FX_POSTERIZE
{
DWORD cbSize;
UINT uFlags;
HIGEAR hIGear;
HWND hWnd;
LPCHAR lpszTitle;
AT_RECT rc;
WORD nLevels;
AT_MODE nColorChannel;
AT_ERRCOUNT nErrCount;
LPFNIGGUI_FX_UPDATE lpfnUpdateProc;
}AT_IGGUI_FX_POSTERIZE;
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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 to be processed. |
| nLevels | WORD | The number of unique colors, or levels, in the resulting image. The valid range is from 1 to 255. |
| nColorChannel | AT_MODE | IG_COLOR_COMP_RGB, or use IG_COLOR_COMP_R, _B, or _G to affect only one color channel. |
| nErrCount | AT_ERRCOUNT | The number of ImageGear errors that occurred during this function call. |
| lpfnUpdateProc | LPFNIGGUI_FX_UPDATE | A pointer to the function that is called when the 'Apply' button is clicked. |