/**
* The getColor function associated with the image.
*
* @param pos The position
*
* @return The color of the pixel at that position.
**/
inline RGBc getColor(iVec2 pos)
{
if (_im == nullptr) return RGBc::c_Transparent;
const int64 lx = _im->lx();
const int64 ly = _im->ly();
int64 x = pos.X();
int64 y = pos.Y();
if (_typepos == TYPECENTER) { x += lx/2; y += ly/2; }
return _im->getPixel(x, ly - 1 - y);
}
/**
* The getColor function associated with the image.
*
* @param pos The position
*
* @return The color of the pixel at that position.
**/
inline RGBc getColor(iVec2 pos)
{
if (_im == nullptr) return RGBc::c_Transparent;
const int64 lx = _im->width();
const int64 ly = _im->height();
int64 x = pos.X();
int64 y = pos.Y();
if (_typepos == TYPECENTER) { x += lx/2; y += ly/2; }
if ((x <0)||(y < 0)||(x >= lx)||(y >= ly)) return RGBc::c_Transparent;
y = ly - 1 - y;
const int64 lxy = lx*ly;
int64 off = x + lx*y;
const unsigned char * p = _im->data();
const char r = *(p + off);
const char g = *(p + off + lxy);
const char b = *(p + off + 2*lxy);
const char a = ((_im->spectrum() < 4) ? (const char)255 : (*(p + off + 3*lxy)));
return RGBc(r, g, b, a);
}
/* circle of similar volume colored in blue */
RGBc colorCircle(iVec2 pos)
{
if (PI*(pos.X()*pos.X() + pos.Y()*pos.Y()) <= N) return RGBc::c_Blue;
return RGBc::c_TransparentWhite;
}