[OpenCV] cv::mat으로 받은 데이터 Controller에 출력

아래의 함수를 추가하며, 파라미터 값에 VideoPicture에서 들어온 capture data를 cv::mat에 copy한다.

copy된 cv::mat을 인자값으로 넣어주며, m_GstView가 Picture Controll 또는 Static Controll의 멤버변수이다.

 

void CGStreamerExDlg::DisplayVideo(Mat frame)
{
	// m_CamMinX, m_CamMinY, m_CamMaxX, m_CamMaxY,
	
	//화면에 보여주기 위한 처리입니다.
	int bpp = 8 * frame.elemSize();
	assert((bpp == 8 || bpp == 24 || bpp == 32));

	int padding = 0;
	//32 bit image is always DWORD aligned because each pixel requires 4 bytes
	if (bpp < 32)
		padding = 4 - (frame.cols % 4);

	if (padding == 4)
		padding = 0;

	int border = 0;
	//32 bit image is always DWORD aligned because each pixel requires 4 bytes
	if (bpp < 32)
	{
		border = 4 - (frame.cols % 4);
	}

	Mat mat_temp;
	if (border > 0 || frame.isContinuous() == false)
	{
		// Adding needed columns on the right (max 3 px)
		cv::copyMakeBorder(frame, mat_temp, 0, 0, 0, border, cv::BORDER_CONSTANT, 0);
	}
	else
	{
		mat_temp = frame;
	}

	//pDlg->DisplayImage(IDC_GST_VIEWER, frame(Rect(480, 270, 960, 540)));
	RECT r;
	m_GstView.GetClientRect(&r);
	//cv::Size winSize(r.right, r.bottom);
	cv::Size winSize(r.right, r.bottom);

	cimage_mfc.Create(winSize.width, winSize.height, 24);

	BITMAPINFO *bitInfo = (BITMAPINFO*)malloc(sizeof(BITMAPINFO)+256 * sizeof(RGBQUAD));
	bitInfo->bmiHeader.biBitCount = bpp;
	bitInfo->bmiHeader.biWidth = mat_temp.cols;
	bitInfo->bmiHeader.biHeight = -mat_temp.rows;
	bitInfo->bmiHeader.biPlanes = 1;
	bitInfo->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
	bitInfo->bmiHeader.biCompression = BI_RGB;
	bitInfo->bmiHeader.biClrImportant = 0;
	bitInfo->bmiHeader.biClrUsed = 0;
	bitInfo->bmiHeader.biSizeImage = 0;
	bitInfo->bmiHeader.biXPelsPerMeter = 0;
	bitInfo->bmiHeader.biYPelsPerMeter = 0;
	


	//그레이스케일 인경우 팔레트가 필요
	if (bpp == 8)
	{
		RGBQUAD* palette = bitInfo->bmiColors;
		for (int i = 0; i < 256; i++)
		{
			palette[i].rgbBlue = palette[i].rgbGreen = palette[i].rgbRed = (BYTE)i;
			palette[i].rgbReserved = 0;
		}
	}


	// Image is bigger or smaller than into destination rectangle
	// we use stretch in full rect

	if (mat_temp.cols == winSize.width  && mat_temp.rows == winSize.height)
	{
		// source and destination have same size
		// transfer memory block
		// NOTE: the padding border will be shown here. Anyway it will be max 3px width

		SetDIBitsToDevice(cimage_mfc.GetDC(),
			//destination rectangle
			0, 0, winSize.width, winSize.height,
			0, 0, 0, mat_temp.rows,
			mat_temp.data, bitInfo, SRCCOPY);
	}
	else
	{
		// destination rectangle
		int destx = 0, desty = 0;
		int destw = winSize.width;
		int desth = winSize.height;

		// rectangle defined on source bitmap
		// using imgWidth instead of mat_temp.cols will ignore the padding border
		int imgx = 0, imgy = 0;
		int imgWidth = mat_temp.cols - border;
		int imgHeight = mat_temp.rows;



		StretchDIBits(cimage_mfc.GetDC(),
			destx, desty, destw, desth,
			imgx, imgy, imgWidth, imgHeight,
			mat_temp.data, bitInfo, DIB_RGB_COLORS, SRCCOPY);
	}


	HDC dc = ::GetDC(m_GstView.m_hWnd);
	cimage_mfc.BitBlt(dc, 0, 0);


	::ReleaseDC(m_GstView.m_hWnd, dc);

	cimage_mfc.ReleaseDC();
	cimage_mfc.Destroy();
}