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

//! [0]
bool DBScreen::initDevice()
{
    if (!QLinuxFbScreen::initDevice())
        return false;

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

    return true;
}
//! [0]

//! [1]
void DBScreen::shutdownDevice()
{
    QLinuxFbScreen::shutdownDevice();
    delete painter;
    delete image;
}
//! [1]

//! [2]
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);
}
//! [2]

//! [3]
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);
    }
}
//! [3]

//! [4]
void DBScreen::exposeRegion(QRegion region, int changing)
{
    QLinuxFbScreen::exposeRegion(region, changing);
    QLinuxFbScreen::blit(*image, QPoint(0, 0), region);
}
//! [4]