Convert 32 to BMP to 24 bits

The 32-bit BMP is used to read the video frame. Because 24-bit BMP is used, a conversion is required. The method is very simple: remove the Alpha value of each pixel in 32 bits,

Byte * ptemp; // known 32-Bit Data

Byte * pdata24;

DWORD dwsize32; // known, 32-bit size

DWORD dwsize24;

 

Dwsize24 = (dwsize32 * 3)/4;

Pdata24 = new byte [dwsize24];

For (INT Index = 0; index <dwsize32/4; index ++) // The total number of pixels

{

Unsigned char r = * (ptemp ++ );

Unsigned char G = * (ptemp ++ );

Unsigned char B = * (ptemp ++ );

(Ptemp ++); // remove alpha

* (Pdata24 ++) = R;

* (Pdata24 ++) = g;

* (Pdata24 ++) = B;

}