L_GWireInit

L_INT GWireFilterBitmapExample(L_VOID) 
{ 
    L_INT nRet; 
    BITMAPHANDLE LeadBitmap;   /* Bitmap handle to hold the loaded image. */ 
    /* Load the bitmap, keeping the bits per pixel of the file */ 
    nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("IMAGE3.dcm")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); 
    if(nRet !=SUCCESS) 
        return nRet; 
 
    GWIREHANDLE gwire ; 
 
    nRet = L_GWireInit(&LeadBitmap, &gwire, 90); 
    if(nRet != SUCCESS) 
    { 
        L_DestroyGWireHandle(gwire); 
 
        if(LeadBitmap.Flags.Allocated)   
            L_FreeBitmap(&LeadBitmap); 
 
        return nRet ; 
    } 
 
    POINT** ppGWirePaths  ; 
    L_INT*  pGWireLengths ; 
    ppGWirePaths = (POINT**) malloc(10 * sizeof(POINT*)); 
    pGWireLengths = (L_INT*) malloc(10 * sizeof(L_INT)); 
    if(ppGWirePaths == NULL || pGWireLengths == NULL) 
    { 
        if(ppGWirePaths == NULL) free(ppGWirePaths); 
        if(pGWireLengths == NULL) free(pGWireLengths); 
 
        if(LeadBitmap.Flags.Allocated)   
            L_FreeBitmap(&LeadBitmap); 
 
        L_DestroyGWireHandle(gwire); 
 
        return ERROR_NO_MEMORY ; 
    } 
 
    // Get the boundaries of the object 
    POINT SeedPoints[9] ; 
    SeedPoints[0].x =  200 ; SeedPoints[0].y = 163 ; 
    SeedPoints[1].x =  245 ; SeedPoints[1].y = 195 ; 
    SeedPoints[2].x =  289 ; SeedPoints[2].y = 163 ; 
    SeedPoints[3].x =  282 ; SeedPoints[3].y = 188 ; 
    SeedPoints[4].x =  304 ; SeedPoints[4].y = 314 ; 
    SeedPoints[5].x =  247 ; SeedPoints[5].y = 271 ; 
    SeedPoints[6].x =  201 ; SeedPoints[6].y = 315 ; 
    SeedPoints[7].x =  228 ; SeedPoints[7].y = 199 ; 
    SeedPoints[8].x =  199 ; SeedPoints[8].y = 175 ; 
 
    L_INT pointIdx = 0 ; 
 
    // Loop over the list of SeedPoints to get the minimum path between each set of two points. 
    for (int index = 0; index < 4; index++) 
    { 
        // Set the seed point. 
        L_GWireSetSeedPoint(gwire, SeedPoints[pointIdx]); 
 
        pointIdx++; 
 
        // Get the minimum path from the seed point to the target point. 
        L_GWireGetMinPath(gwire, SeedPoints[pointIdx], &ppGWirePaths[index], &pGWireLengths[index]); 
    } 
 
    L_INT PointsSum = 0 ; 
    for(L_INT i = 0 ; i < pointIdx ; i++) 
    { 
        PointsSum += pGWireLengths[i] ; 
    } 
 
    // have all paths in one buffer. 
    POINT* pFinalPath = (POINT*) malloc(PointsSum * sizeof(POINT)); 
    L_INT PointsCount = 0 ; 
    for(L_INT i = 0 ; i < pointIdx ; i++) 
    { 
        memcpy(&(pFinalPath[PointsCount]),ppGWirePaths[i],pGWireLengths[i]*sizeof(POINT)); 
        L_FreeGWirePath(ppGWirePaths[i]); 
        PointsCount+=pGWireLengths[i] ; 
    } 
 
    L_DestroyGWireHandle(gwire); 
    free(ppGWirePaths); 
    free(pGWireLengths); 
 
    // Use the minimum path around the object and convert it to a region. 
    L_SetBitmapRgnPolygon(&LeadBitmap, NULL, pFinalPath, PointsSum, L_POLY_ALTERNATE, L_RGN_SET); 
 
    return SUCCESS; 
}