LEADTOOLS Raster Imaging C DLL Help
| LEADTOOLS Raster Imaging C DLL Help > Function References > Callback Functions > BORDERREMOVECALLBACK Function |
#include "l_bitmap.h"
L_INT pEXT_CALLBACK YourFunction(hRgn, uBorderToRemove, pBoundingRect, pUserData)
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HRGN hRgn; |
/* windows region */ |
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L_UINT uBorderToRemove; |
/* border flag */ |
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PRECT pBoundingRect; |
/* pointer to a RECT structure */ |
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L_VOID *pUserData; |
/* pointer to additional parameters */ |
Handles each border found by L_BorderRemoveBitmap.
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Parameter |
Description |
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hRgn |
Windows region representing the border to be removed. It is the programmers responsibility to delete this region (using DeleteObject() when it is no longer needed). |
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uBorderToRemove |
Flag that indicates which border is being processed. Possible values are: |
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Value |
Meaning |
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BORDER_LEFT |
The left border is being processed. |
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BORDER_TOP |
The top border is being processed. |
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BORDER_RIGHT |
The right border is being processed. |
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BORDER_BOTTOM |
The bottom border is being processed. |
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pBoundingRect |
Pointer to a RECT structure that contains the bounding rectangle of the border being processed. |
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pUserData |
A void pointer that you can use to access a variable or structure containing data that your callback function needs. This gives you a way to receive data indirectly from the function that uses this callback function. (This is the same pointer that you pass in the pUserData parameter of L_BorderRemoveBitmap.) |
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Keep in mind that this is a void pointer, which must be cast to the appropriate data type within your callback function. |
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Returns
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SUCCESS_REMOVE |
Remove the border. |
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SUCCESS_NOREMOVE |
Do not remove the border. |
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Otherwise |
An error occurred. Refer to Return Codes. |
Comments
The callback is called once for each border found. It is called a maximum of four times for each call to the C DLL. Return SUCCESS_REMOVE to have the border removed. Return SUCCESS_NOREMOVE to leave the border unchanged. Pass any other value to abort. This value will be the return value of the L_BorderRemoveBitmap(). If flags BORDER_IMAGE_UNCHANGED and BORDER_SINGLE_REGION are being used, then the return value of the callback affects only the internal single region that contains all the changes.
Required DLLs and Libraries
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LTIMGCOR For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
See Also
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Functions: |
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Topics: |
Example
For an example, refer to L_BorderRemoveBitmap.
