DirectX -- overlay the characters on yuv420p, and yuv420p

DirectX -- overlay the characters on yuv420p, and yuv420p

Unsigned char * pTemp;
BYTE OsdY = 0;
BYTE OsdU = 0;
BYTE OsdV = 0;

Void OSDSetTextColor (BYTE OsdR, BYTE OsdG, BYTE OsdB)
{
OsdY = 0.25 * OsdR + 0.504 * OsdG + 0.098 * OsdB + 16;
OsdU =-0.148 * OsdR-0.291 * OsdG + 0.439 * OsdB + 128;
OsdV = 0.439 * OsdR-0.368 * OsdG-0.071 * OsdB + 128;
}
Void CTest0Dlg: setOSD ()
{
FILE * fp = fopen ("d: \ temp \ OSD.bmp", "rb ");
If (fp = 0)
Return;
HDC hDC =: GetDC (GetSafeHwnd ());
HDC hMemDC = CreateCompatibleDC (hDC );
Fseek (fp, sizeof (BITMAPFILEHEADER), 0 );
BITMAPINFOHEADER head;
Fread (& head, sizeof (BITMAPINFOHEADER), 1, fp );
Int bmpHeight = head. biHeight;
Int BMP width = head. biWidth;
Int biBitCount = head. biBitCount;
Int lineByte = (BMP width * biBitCount/8 + 3)/4*4;
RGBQUAD * pColorTable;
Unsigned char * pBmpBuf = new unsigned char [lineByte * bmpHeight];
Fread (pBmpBuf, 1, lineByte * bmpHeight, fp );
Memset (pBmpBuf, 0, lineByte * bmpHeight );

CDC * m_pMemDC;
M_pMemDC = new CDC ();
CDC * pDC;
PDC = GetDC ();
M_pMemDC-> CreateCompatibleDC (pDC );
CBitmap * m_pOldBmp = NULL;
CBitmap * m_pMemBmp = new CBitmap (); // create a compatible Bitmap Based on the image size
M_pMemBmp-> CreateCompatibleBitmap (pDC, BMP width, bmpHeight );
M_pOldBmp = m_pMemDC-> SelectObject (m_pMemBmp );

// Draw the image data to a compatible bitmap

SetDIBits (m_pMemDC-> GetSafeHdc (), (HBITMAP) m_pMemBmp-> m_hObject,
0, bmpHeight, (LPVOID) pBmpBuf, (BITMAPINFO *) & head, DIB_RGB_COLORS );
M_pMemDC-> SetBkMode (TRANSPARENT );
M_pMemDC-> SetTextColor (RGB (255, 0, 0); // RGB flag color
OSDSetTextColor (0, 0, 0); // OSD display color

// Set the font
CFont font;
Font. CreateFont (20, 15, 0, 10, FALSE, ANSI_CHARSET, OUT_DEFAULT_PRECIS, OUT_DEFAULT_PRECIS, DEFAULT_QUALITY, FF_SWISS, "");
SelectObject (hMemDC, font );
///////////////////////////
SYSTEMTIME st;
CString strDate, strTime;
GetLocalTime (& st );
StrDate. Format ("time % 04d-% 02d-% 02d", st. wYear, st. wMonth, st. wDay );
StrTime. Format ("% 02d: % 02d: % 02d", st. wHour, st. wMinute, st. wSecond );
// Add text to a specified position
M_pMemDC-> TextOut (20, 40, strDate + strTime );

PTemp = new unsigned char [lineByte * bmpHeight];
GetDIBits (m_pMemDC-> GetSafeHdc (), (HBITMAP) m_pMemBmp-> m_hObject, 0, bmpHeight,
(LPVOID) pTemp, (BITMAPINFO *) & head, DIB_RGB_COLORS );
Fclose (fp );

Delete m_pMemBmp;
Delete m_pMemDC;
Delete [] pBmpBuf;


// MessageBox ("VOER! ");
}

Call part

//////////////////////////////////////// //////////////////////////////////////// //////
SetOSD ();
For (int I = 0; I <80; I ++)
{
For (int k = 0; k <640; k ++)
{
// Dc. setPixel (k, 79-i, RGB (pTemp [(I * 640 + k) * 3 + 2], pTemp [(I * 640 + k) * 3 + 1], pTemp [(I * 640 + k) * 3 + 0]);
If (pTemp [(I * 640 + k) * 3 + 2]! = 0) // You Need to overlay the filter by marking the color.
{
PFrameYUV-> data [0] [(79-i) * 720 + k] = OsdY;
If (79-i) % 2 = 0)
{
PFrameYUV-> data [1] [(79-i) x 720/4 + k/2] = OsdU;
PFrameYUV-> data [2] [(79-i) x 720/4 + k/2] = OsdV;
}

}
}
}
//////////////////////////////////////// //////////////////////////////////////// /////////
Memcpy (image-> pixels [0], pFrameYUV-> data [0], 720*576); // copy the data yuv420, or change the pointer in advance
Memcpy (image-> pixels [2], pFrameYUV-> data [1], 720*576/4 );
Memcpy (image-> pixels [1], pFrameYUV-> data [2], 720*576/4 );

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