#include <cassert>
#include <vector>
#include <vcl.h>

//Draws a (grey) TImage from a 2D-std::vector (y-x-ordered)
//From http://www.richelbilderbeek.nl/CppVectorToImage.htm
void VectorToImage(const std::vector<std::vector<int> >& v, const TImage * const image)
{
  assert(image!=0 && "Image must not be NULL");
  assert(image->Picture->Bitmap!=0 && "Bitmap must not be NULL");
  assert(image->Picture->Bitmap->PixelFormat == pf24bit && "Bitmap must be 24 bit");

  const int height = v.size();
  const int width  = v[0].size();

  image->Picture->Bitmap->Height = height;
  image->Picture->Bitmap->Width  = width;

  for (int y=0; y!=height; ++y)
  {
    assert(y >= 0);
    assert(y < static_cast<int>(v.size()));
    const std::vector<int>& vLine = v[y];
    unsigned char * const line
      = static_cast<unsigned char *>(image->Picture->Bitmap->ScanLine[y]);
    for (int x=0; x!=width; ++x)
    {
      assert(x >= 0);
      assert(x < static_cast<int>(vLine.size()));
      const int grey = vLine[x];
      line[x*3+2] = grey; //Red
      line[x*3+1] = grey; //Green
      line[x*3+0] = grey; //Blue
    }
  }
}