Fractional pixel size with Qt

main.cpp

#include <QApplication>
#include <QGraphicsScene>
#include <QLabel>
#include <QBrush>
#include <QGraphicsSimpleTextItem>
#include <QColor>
#include <QGraphicsView>

using namespace std;

int main(int argc, char *argv[])
{
    const int scale = 44;
    
    QApplication   a(argc, argv);
    QGraphicsScene scene;
    QGraphicsView  view(&scene);
    QImage         image("test.bmp");
    
    scene.addPixmap(QPixmap::fromImage(image.scaled(image.width(), image.height())));
    
    for (int x = 0; x < image.width(); ++x)
      for (int y = 0; y < image.height(); ++y) {
        auto text = new QGraphicsSimpleTextItem();
    
        text->setText(QString::number(qGray(image.pixel(x, y))));
        text->setBrush(QBrush(Qt::red));
        text->setFlag(QGraphicsItem::ItemIgnoresTransformations,true);
        text->setPos(view.mapFromScene(x+0.2, y+0.2));
        scene.addItem(text);
      }
    
    view.scale(scale, scale);
    view.show();
    
    return a.exec();
}