LBitmap::GetRgnContourPoints
#include "ltwrappr.h"
virtual L_INT LBitmap::GetRgnContourPoints (pXForm, ppPoints, puSize, uFlag)
pRGNXFORM pXForm; |
/* pointer to a coordinate-translation structure */ |
POINT ** ppPoints; |
/* pointer to a pointer */ |
L_UINT * puSize; |
/* pointer to a variable to be updated */ |
L_UINT uFlag; |
/* flag */ |
Returns the contour coordinates of a region.
Parameter |
Description |
|
pXForm |
Pointer to an RGNXFORM structure that LEADTOOLS uses to translate between display coordinates and bitmap coordinates. |
|
|
If you specify NULL in this parameter, the scalar fields default to 1, the offsets default to 0, and the view perspective defaults to the bitmap's view perspective. |
|
ppPoints |
Pointer to a pointer to be updated with an array that contains the coordinate points of the contour for the specified region. A memory buffer for this array is allocated by the function. When the array is no longer needed, the user should free it by calling the GlobalFreePtr macro. |
|
puSize |
Address of a variable to be updated with the number of points in the buffer. |
|
uFlag |
Flag that indicates the required contour points. Possible values are: |
|
|
Value |
Meaning |
|
RGNCONTOUR_ALL |
[0x0000] Gets all region contour points ignoring their order. |
|
RGNCONTOUR_OUTSIDE |
[0x0001] Gets the outside region contour points only in an ordered way that allows you to reconstruct the outside region shape from these points. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
This function works only on bitmaps having a region. If a bitmap does not have a region the function returns the error: Not Initialized.
To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallback.
This function supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
This function supports signed data images.
Required DLLs and Libraries
LTIMGEFX 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
Example
L_INT LBitmap__GetRgnContourPointsExample(LBitmap *pLeadBitmap) { L_INT nRet; RECT rcRect; POINT * pPoints; L_UINT uSize; rcRect.top = pLeadBitmap->GetHeight ()/3; rcRect.bottom = pLeadBitmap->GetHeight ()*2/3; rcRect.left = pLeadBitmap->GetWidth ()/3; rcRect.right = pLeadBitmap->GetWidth ()*2/3; nRet =pLeadBitmap->Region()->SetRgnEllipse (&rcRect); if(nRet !=SUCCESS) return nRet; nRet =pLeadBitmap->GetRgnContourPoints(NULL, &pPoints, &uSize,0); if(nRet !=SUCCESS) return nRet; return SUCCESS; }