qt_screen_info.cpp

#include <QGuiApplication>
#include <QScreen>
#include <Qpixmap>
#include <QDebug>

int main(int argc, char *argv[])
{
    QGuiApplication a(argc, argv);

    QList<QScreen *> screens = QGuiApplication::screens();
    QList<QPixmap> pixmapsList;
    for (int i=0; i<screens.size(); i++)
    {
       pixmapsList.push_back(screens[i]->grabWindow(0));
    }

    for (int i=0; i<pixmapsList.size(); i++)
    {
       qDebug()<< "Screen" << i << ":";
       qDebug()<< "height:" << pixmapsList[i].height();
       qDebug()<< "width:" <<pixmapsList[i].width();
       qDebug()<< "rect:" <<pixmapsList[i].rect();
       qDebug()<< "size:" <<pixmapsList[i].size();
       qDebug()<< "cacheKey:" <<pixmapsList[i].cacheKey();
       qDebug()<< "depth:" <<pixmapsList[i].depth();
       qDebug()<< "isQBitmap:" <<pixmapsList[i].isQBitmap();
       qDebug()<< "isNull:" <<pixmapsList[i].isNull();
       qDebug()<< "defaultDepth:" <<pixmapsList[i].defaultDepth();
       qDebug()<< "";
    }
    return 0;
}