This function translates an array of points from device coordinates to image coordinates.
Declaration:
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AT_ERRCOUNT ACCUAPI IG_dspl_device_to_image(
[IN] HIGEAR hIGear,
[IN] DWORD dwGrpID,
[IN] HWND hWnd,
[IN] HDC hDC,
[IN/OUT] LPAT_POINT lpPoint,
[IN] UINT nCount
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Arguments:
| Name | Type | Description |
| hIGear | HIGEAR | ImageGear handle of image. |
| dwGrpID | DWORD | Identifier of the group from which to get the display options. |
| hWnd | HWND | Handle of the window where the image is drawn. |
| hDC | HDC | Handle of the device context used for drawing. This can be NULL, but if a calculation is necessary for a printer device context, then you should provide the real value. |
| lpPoint | LPAT_POINT | Pointer to an array of points that should be translated. |
| nCount | UINT | Number of elements in the lpPoint array. |
Return Value:
Returns the number of ImageGear errors that occurred during this function call.
Supported Raster Image Formats:
All pixel formats supported by ImageGear Professional.
Sample:
Image Processing, Clipboard
Example:
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HIGEAR hIGear; /* HIGEAR handle of image */ DWORD nGrpID; /* display group identifier */ AT_POINT p[2]; /* array of point to translate */ RECT rc; ... /* calculate coordinates in image coordinate space of current client rectangle of the window */ GetClientRect( hWnd, &rc ); p[0].x = rc.left; p[0].y = rc.top; p[1].x = rc.right; p[1].y = rc.bottom; IG_dspl_device_to_image( hIGear, nGrpID, hWnd, NULL, p, 2 ); ... |
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Remarks:
This function takes into account all display parameters including orientation and current scrolling position.