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dbscreen.cpp Example File
qws/dbscreen/dbscreen.cpp

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 #include "dbscreen.h"
 #include <QApplication>

 bool DBScreen::initDevice()
 {
     if (!QLinuxFbScreen::initDevice())
         return false;

     QScreenCursor::initSoftwareCursor();
     image = new QImage(deviceWidth(), deviceHeight(), pixelFormat());
     painter = new QPainter(image);

     return true;
 }

 void DBScreen::shutdownDevice()
 {
     QLinuxFbScreen::shutdownDevice();
     delete painter;
     delete image;
 }

 void DBScreen::solidFill(const QColor &color, const QRegion &region)
 {
     QVector<QRect> rects = region.rects();
     for (int i = 0; i  < rects.size(); i++)
         painter->fillRect(rects.at(i), color);
 }

 void DBScreen::blit(const QImage &image, const QPoint &topLeft, const QRegion &region)
 {
     QVector<QRect> rects = region.rects();
     for (int i = 0; i < rects.size(); i++) {
         QRect destRect = rects.at(i);
         QRect srcRect(destRect.x()-topLeft.x(), destRect.y()-topLeft.y(), destRect.width(), destRect.height());
         painter->drawImage(destRect.topLeft(), image, srcRect);
     }
 }

 void DBScreen::exposeRegion(QRegion region, int changing)
 {
     QLinuxFbScreen::exposeRegion(region, changing);
     QLinuxFbScreen::blit(*image, QPoint(0, 0), region);
 }