Bitmap::Bitmap(int xsize, int ysize, const PixelFormat& pxf)
{
assert( xsize > 0 && ysize > 0 );
width = xsize;
height = ysize;
pitch = width * pxf.GetBytes();
format = pxf;
image = new uint8[height*pitch];
}
void Bitmap::SetImage(int xsize, int ysize, const PixelFormat& pxf, void* i)
{
assert( xsize > 0 && ysize > 0 );
delete[] image;
width = xsize;
height = ysize;
pitch = xsize * pxf.GetBytes();
format = pxf;
image = reinterpret_cast<uint8*>(i);
}