Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits. |
#include "l_bitmap.h"
L_LTIMGEFX_API L_INT L_GetRgnContourPoints (pBitmap, pXForm, ppPoints, puSize, uFlags)
pBITMAPHANDLE pBitmap; |
/* pointer to the bitmap handle */ |
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 uFlags; |
/* flag */ |
Returns the contour coordinates of a region.
Parameter |
Description |
|
pBitmap |
Pointer to the bitmap handle. |
|
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. |
|
uFlags |
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 L_SetStatusCallback.
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 in the Document and Medical Imaging toolkits.
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. |
Platforms
Win32, x64.
See Also
Example
#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName L_INT GetRgnContourPointsExample(L_VOID) { L_INT nRet; BITMAPHANDLE LeadBitmap; /* Bitmap handle for the image */ RECT rcRect; POINT * pPoints; L_UINT uSize; /* Load a bitmap at its own bits per pixel */ nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("ImageProcessingDemo\\Image3.cmp")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); if(nRet !=SUCCESS) return nRet; rcRect.top = LeadBitmap.Height/3; rcRect.bottom = LeadBitmap.Height*2/3; rcRect.left = LeadBitmap.Width/3; rcRect.right = LeadBitmap.Width*2/3; nRet = L_SetBitmapRgnEllipse (&LeadBitmap, NULL, &rcRect, L_RGN_SET); if(nRet !=SUCCESS) return nRet; nRet = L_GetRgnContourPoints (&LeadBitmap, NULL, &pPoints, &uSize, RGNCONTOUR_ALL); if(nRet !=SUCCESS) return nRet; //free bitmap if(LeadBitmap.Flags.Allocated) L_FreeBitmap(&LeadBitmap); return SUCCESS; }