QImage DetailWindow::imageFromChromagram(const KeyFinder::Chromagram& ch){
// 64 colours (plus black at index 0)
// don't draw individual pixels; draw blocks of chromaScaleV*chromaScaleH. Sharpens image.
QImage img = QImage(ch.getHops()*chromaScaleH,ch.getBins()*chromaScaleV,QImage::Format_Indexed8);
prefs.setImageColours(img,ui->chromaColourCombo->currentIndex());
// get max to normalise
float max = 0;
for(unsigned int h = 0; h < ch.getHops(); h++){
for(unsigned int b = 0; b < ch.getBins(); b++){
float mag = ch.getMagnitude(h,b);
if(mag>max) max = mag;
}
}
// set pixels
for(unsigned int h = 0; h < ch.getHops(); h++){
for(unsigned int b = 0; b < ch.getBins(); b++){
int pixVal = ch.getMagnitude(h,b) / max * img.colorCount() - 1;
if(pixVal<1)
pixVal = 1;
for(int x=0; x<chromaScaleH; x++)
for(int y=0; y<chromaScaleV; y++)
img.setPixel(h*chromaScaleH+x, (ch.getBins()-1-b)*chromaScaleV+y, pixVal);
}
}
return img;
}
TEST (ChromagramTest, ConstructorDefaultsWork) {
KeyFinder::Chromagram c;
ASSERT_EQ(0, c.getHops());
}