我正在尝试从C#(作为short [])到C ++(作为无符号short *)传递2D掩码(全为0,期望感兴趣的区域为1s),但是我无法在C ++中获得正确的值。
C#
[DllImport("StatsManager.dll", EntryPoint = "SetStatsMask")]
private static extern int SetStatsMask(IntPtr mask, int imgWidth, int imgHeight);
short[] mask;
mask = new short[8*8];
// some operation here making a ROI in mask all 1. ex 0000111100000000 in 1D
IntPtr maskPtr = Marshal.AllocHGlobal(2 * mask.Length);
Marshal.Copy(mask, 0, maskPtr, mask.Length);
SetStatsMask(maskPtr, width, height);
C ++
long StatsManager::SetStatsMask(unsigned short *mask, long width, long height)
{
//create memory to store the incoming mask
//memcpy the mask to the new buffer
//pMask = realloc(pMask,width*height*sizeof(unsigned short));
long ret = TRUE;
if (NULL == _pMask)
{
_pMask = new unsigned short[width * height];
}
else
{
realloc(_pMask,width*height*sizeof(unsigned short));
}
memcpy(mask,_pMask,width*height*sizeof(unsigned short));
SaveBuffer(_pMask, width, height);
return ret;
}
但是我只能使用
52536
而不是0000111100000000
来在C ++中使用遮罩查看蒙版,所以我想知道我在哪里搞砸了?有人可以帮忙吗?谢谢。 最佳答案
我相信您放错了memcpy
的参数:
memcpy(mask,_pMask,width*height*sizeof(unsigned short));
据我了解,您想从
mask
复制到_pMask
,因此您应该写:memcpy(_pMask, mask, width*height*sizeof(unsigned short));