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#include <QTime>

#include <QDebug>

#include <private/qt_x11_p.h>

#include <private/qimagepixmapcleanuphooks_p.h>

#include "qwindowsurface_x11gl_p.h"

#include "qpixmapdata_x11gl_p.h"

QT_BEGIN_NAMESPACE

QX11GLWindowSurface::QX11GLWindowSurface(QWidget* window)

    : QWindowSurface(window), m_GC(0), m_window(window)

{

}

QX11GLWindowSurface::~QX11GLWindowSurface()

{

    if (m_GC)

        XFree(m_GC);

}

QPaintDevice *QX11GLWindowSurface::paintDevice()

{

    return &m_backBuffer;

}

extern void *qt_getClipRects(const QRegion &r, int &num); // in qpaintengine_x11.cpp

void QX11GLWindowSurface::flush(QWidget *widget, const QRegion &widgetRegion, const QPoint &offset)

{

//    qDebug("QX11GLWindowSurface::flush()");

    QTime startTime = QTime::currentTime();

    if (m_backBuffer.isNull()) {

        qDebug("QHarmattanWindowSurface::flush() - backBuffer is null, not flushing anything");

        return;

    }

    QPoint widgetOffset = qt_qwidget_data(widget)->wrect.topLeft();

    QRegion windowRegion(widgetRegion);

    QRect boundingRect = widgetRegion.boundingRect();

    if (!widgetOffset.isNull())

        windowRegion.translate(-widgetOffset);

    QRect windowBoundingRect = windowRegion.boundingRect();

    int rectCount;

    XRectangle *rects = (XRectangle *)qt_getClipRects(windowRegion, rectCount);

    if (rectCount <= 0)

        return;

//         qDebug() << "XSetClipRectangles";

//         for  (int i = 0; i < num; ++i)

//             qDebug() << ' ' << i << rects[i].x << rects[i].x << rects[i].y << rects[i].width << rects[i].height;

    if (m_GC == 0) {

        m_GC = XCreateGC(X11->display, m_window->handle(), 0, 0);

        XSetGraphicsExposures(X11->display, m_GC, False);

    }

    XSetClipRectangles(X11->display, m_GC, 0, 0, rects, rectCount, YXBanded);

    XCopyArea(X11->display, m_backBuffer.handle(), m_window->handle(), m_GC,

              boundingRect.x() + offset.x(), boundingRect.y() + offset.y(),

              boundingRect.width(), boundingRect.height(),

              windowBoundingRect.x(), windowBoundingRect.y());

}

void QX11GLWindowSurface::setGeometry(const QRect &rect)

{

    if (rect.width() > m_backBuffer.size().width() || rect.height() > m_backBuffer.size().height()) {

        QSize newSize = rect.size();

//        QSize newSize(1024,512);

        qDebug() << "QX11GLWindowSurface::setGeometry() - creating a pixmap of size" << newSize;

        QX11GLPixmapData *pd = new QX11GLPixmapData;

        pd->resize(newSize.width(), newSize.height());

        m_backBuffer = QPixmap(pd);

    }

//    if (gc)

//        XFreeGC(X11->display, gc);

//    gc = XCreateGC(X11->display, d_ptr->device.handle(), 0, 0);

//    XSetGraphicsExposures(X11->display, gc, False);

    QWindowSurface::setGeometry(rect);

}

bool QX11GLWindowSurface::scroll(const QRegion &area, int dx, int dy)

{

    Q_UNUSED(area);

    Q_UNUSED(dx);

    Q_UNUSED(dy);

    return false;

}

/*

void QX11GLWindowSurface::beginPaint(const QRegion &region)

{

}

void QX11GLWindowSurface::endPaint(const QRegion &region)

{

}

QImage *QX11GLWindowSurface::buffer(const QWidget *widget)

{

}

*/

QT_END_NAMESPACE