bool brightRGB::getMax(const image& img,dvector& dest) const{
// image empty?
if (img.empty()) {
setStatusString("image empty");
dest.resize(0);
return false;
}
const rgbPixel transColor = getParameters().transColor;
ivector maxV(3,-1);
image::const_iterator it = img.begin();
if(getParameters().transparent) {
while(it != img.end()) {
if(*it != transColor) {
if((*it).getRed() > maxV.at(0))
maxV.at(0) = (*it).getRed();
if((*it).getGreen() > maxV.at(1))
maxV.at(1) = (*it).getGreen();
if((*it).getBlue() > maxV.at(2))
maxV.at(2) = (*it).getBlue();
}
it++;
}
// only transparent pixels?
if (maxV.at(0)==-1) {
setStatusString("only transparent pixels");
dest.resize(0);
return false;
}
} else { // no transparent color
while(it != img.end()) {
if((*it).getRed() > maxV.at(0))
maxV.at(0) = (*it).getRed();
if((*it).getGreen() > maxV.at(1))
maxV.at(1) = (*it).getGreen();
if((*it).getBlue() > maxV.at(2))
maxV.at(2) = (*it).getBlue();
it++;
}
}
if(maxV.at(0) == -1)
return false;
dest.castFrom(maxV);
// normalize to 0..1
dest.divide(255);
return true;
};
