Icon::Icon(const Pixmap &pm, SpritesHolder &h) : normal(h.load(pm)) {
Pixmap d = Pixmap(pm.width(),pm.height(),pm.hasAlpha());
const uint8_t* p = pm.const_data();
if(pm.hasAlpha()){
for(int r=0; r<pm.height(); ++r)
for(int i=0; i<pm.width(); ++i){
//0.299, 0.587, 0.114
uint8_t cl = uint8_t(p[0]*0.299 + p[1]*0.587 + p[2]*0.114);
d.set(i,r,Pixmap::Pixel{cl,cl,cl,p[3]});
p += 4;
}
} else {
for(int r=0; r<pm.height(); ++r)
for(int i=0; i<pm.width(); ++i){
//0.299, 0.587, 0.114
uint8_t cl = uint8_t(p[0]*0.299 + p[1]*0.587 + p[2]*0.114);
d.set(i,r,Pixmap::Pixel{cl,cl,cl,255});
p += 3;
}
}
disabled = h.load(d);
}
