LBitmap::GetRgnPerimeterLength
#include "ltwrappr.h"
virtual L_INT LBitmap::GetRgnPerimeterLength (pXForm, puLength)
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pRGNXFORM pXForm; |
/* pointer to a coordinate-translation structure */ |
|
/* pointer to a variable to be updated */ |
Computes the length of the perimeter of a region.
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Parameter |
Description |
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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. |
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puLength |
Address of a variable to be updated with the perimeter length of the region. The length is expressed in pixels. |
Returns
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SUCCESS |
The function was successful. |
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< 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
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LTIMG 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
void TestFunction(LBitmap *pLeadBitmap)
{
RECT rcRect;
L_UINT uPerimeter;
rcRect.top = pLeadBitmap->GetHeight ()/3;
rcRect.bottom = pLeadBitmap->GetHeight ()*2/3;
rcRect.left = pLeadBitmap->GetWidth ()/3;
rcRect.right = pLeadBitmap->GetWidth ()*2/3;
pLeadBitmap->Region()->SetRgnEllipse (&rcRect);
pLeadBitmap->GetRgnPerimeterLength(NULL, &uPerimeter);
}