Removes a certain color from a TImage by replacing it by black.

//From http://www.richelbilderbeek.nl

void RemoveColor(TImage * const image, const TColor color)

{

  assert(image!=0);

  assert(image->Picture->Bitmap != 0);

  assert(image->Picture->Bitmap->PixelFormat == pf24bit);



  const int maxx = image->Picture->Bitmap->Width;

  const int maxy = image->Picture->Bitmap->Height;

  const unsigned char red   = GetRValue(color);

  const unsigned char green = GetGValue(color);

  const unsigned char blue  = GetBValue(color);

  for (int y = 0; y != maxy; ++y)

  {

    unsigned char * const myLine

      = static_cast<unsigned char*>(image->Picture->Bitmap->ScanLine[y]);

    for (int x = 0; x != maxx; ++x)

    {

      if ( myLine[x*3+2] == red    //Red

        && myLine[x*3+1] == green  //Green

        && myLine[x*3+0] == blue ) //Blue

      {

        myLine[x*3+2] = 0 ; //Red

        myLine[x*3+1] = 0 ; //Green

        myLine[x*3+0] = 0 ; //Blue

      }

    }

  }

}



//From http://www.richelbilderbeek.nl

void RemoveColor(TImage * const image,

  const unsigned char red,

  const unsigned char green,

  const unsigned char blue  )

{

  assert(image!=0);

  assert(image->Picture->Bitmap != 0);

  assert(image->Picture->Bitmap->PixelFormat == pf24bit);



  const int maxx = image->Picture->Bitmap->Width;

  const int maxy = image->Picture->Bitmap->Height;

  for (int y = 0; y != maxy; ++y)

  {

    unsigned char * const myLine

      = static_cast<unsigned char*>(image->Picture->Bitmap->ScanLine[y]);

    for (int x = 0; x != maxx; ++x)

    {

      if ( myLine[x*3+2] == red    //Red

        && myLine[x*3+1] == green  //Green

        && myLine[x*3+0] == blue ) //Blue

      {

        myLine[x*3+2] = 0 ; //Red

        myLine[x*3+1] = 0 ; //Green

        myLine[x*3+0] = 0 ; //Blue

      }

    }

  }

}
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(C++) RemoveColor
