Display image in Qt with rounder corners

[ars]

Hello,

use painter->roundedRect() instead of painter->roundRect(). Sorry for the typo in my previous post. I tried it on my PC and just copied text from your post and modified it

Here is my example code:

#include "mainwindow.h"
#include "ui_mainwindow.h"
 
#include <QPixmap>
#include <QBitmap>
#include <QPainter>
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
 
    QPixmap pix(":./picture.png");
    QPixmap scaled = pix.scaled(28,28,Qt::KeepAspectRatio,Qt::SmoothTransformation);
    ui->square->setPixmap(scaled);
 
 
    QBitmap map(28,28);
    map.fill(Qt::color0);
 
 
    QPainter painter( &map );
    painter.setBrush(Qt::color1);
    painter.drawRoundedRect( 0, 0, 28, 28,8,8);
 
 
 
    scaled.setMask(map);
    ui->rounded->setPixmap(scaled);
}
 
MainWindow::~MainWindow()
{
    delete ui;
}

#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <QPixmap>
#include <QBitmap>
#include <QPainter>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    QPixmap pix(":./picture.png");
    QPixmap scaled = pix.scaled(28,28,Qt::KeepAspectRatio,Qt::SmoothTransformation);
    ui->square->setPixmap(scaled);


    QBitmap map(28,28);
    map.fill(Qt::color0);


    QPainter painter( &map );
    painter.setBrush(Qt::color1);
    painter.drawRoundedRect( 0, 0, 28, 28,8,8);



    scaled.setMask(map);
    ui->rounded->setPixmap(scaled);
}

MainWindow::~MainWindow()
{
    delete ui;
}

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and here is the result of running it:
Rounded.png

Best regards
ars