+ m_cgColour.reset( col );
+ size_t noComp = CGColorGetNumberOfComponents( col );
+ if ( noComp >=3 && noComp <= 4 )
+ {
+ // TODO verify whether we really are on a RGB color space
+ const CGFloat *components = CGColorGetComponents( col );
+ m_red = (int)(components[0]*255+0.5);
+ m_green = (int)(components[1]*255+0.5);
+ m_blue = (int)(components[2]*255+0.5);
+ if ( noComp == 4 )
+ m_alpha = (int)(components[3]*255+0.5);
+ else
+ m_alpha = wxALPHA_OPAQUE;
+ }
+ else
+ {
+ m_alpha = wxALPHA_OPAQUE;
+ m_red = m_green = m_blue = 0;
+ }