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#include "qscreentransformed_qws.h"

#ifndef QT_NO_QWS_TRANSFORMED

#include <qscreendriverfactory_qws.h>

#include <qvector.h>

#include <private/qpainter_p.h>

#include <private/qmemrotate_p.h>

#include <qmatrix.h>

#include <unistd.h>

#include <sys/ioctl.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <sys/mman.h>

#include <fcntl.h>

#include <errno.h>

#include <qwindowsystem_qws.h>

#include <qwsdisplay_qws.h>

QT_BEGIN_NAMESPACE

//#define QT_REGION_DEBUG

#ifdef QT_REGION_DEBUG

#include <QDebug>

#endif

class QTransformedScreenPrivate

{

public:

    QTransformedScreenPrivate(QTransformedScreen *parent);

    void configure();

    QTransformedScreen::Transformation transformation;

#ifdef QT_QWS_DEPTH_GENERIC

    bool doGenericColors;

#endif

    QTransformedScreen *q;

};

QTransformedScreenPrivate::QTransformedScreenPrivate(QTransformedScreen *parent)

    : transformation(QTransformedScreen::None),

#ifdef QT_QWS_DEPTH_GENERIC

      doGenericColors(false),

#endif

      q(parent)

{

}

extern "C"

#ifndef QT_BUILD_GUI_LIB

Q_DECL_EXPORT

#endif

void qws_setScreenTransformation(QScreen *that, int t)

{

    QTransformedScreen *tscreen = static_cast<QTransformedScreen*>(that);

    tscreen->setTransformation((QTransformedScreen::Transformation)t);

}

// ---------------------------------------------------------------------------

// Transformed Screen

// ---------------------------------------------------------------------------

/*!

    \internal

    \class QTransformedScreen

    \ingroup qws

    \brief The QTransformedScreen class implements a screen driver for

    a transformed screen.

    Note that this class is only available in \l{Qt for Embedded Linux}.

    Custom screen drivers can be added by subclassing the

    QScreenDriverPlugin class, using the QScreenDriverFactory class to

    dynamically load the driver into the application, but there should

    only be one screen object per application.

    Use the QScreen::isTransformed() function to determine if a screen

    is transformed. The QTransformedScreen class itself provides means

    of rotating the screen with its setTransformation() function; the

    transformation() function returns the currently set rotation in

    terms of the \l Transformation enum (which describes the various

    available rotation settings). Alternatively, QTransformedScreen

    provides an implementation of the QScreen::transformOrientation()

    function, returning the current rotation as an integer value.

    \sa QScreen, QScreenDriverPlugin, {Running Applications}

*/

/*!

    \enum QTransformedScreen::Transformation

    This enum describes the various rotations a transformed screen can

    have.

    \value None No rotation

    \value Rot90 90 degrees rotation

    \value Rot180 180 degrees rotation

    \value Rot270 270 degrees rotation

*/

/*!

    \fn bool QTransformedScreen::isTransformed() const

    \reimp

*/

/*!

    Constructs a QTransformedScreen object. The \a displayId argument

    identifies the Qt for Embedded Linux server to connect to.

*/

QTransformedScreen::QTransformedScreen(int displayId)

    : QProxyScreen(displayId, QScreen::TransformedClass)

{

    d_ptr = new QTransformedScreenPrivate(this);

    d_ptr->transformation = None;

#ifdef QT_REGION_DEBUG

    qDebug() << "QTransformedScreen::QTransformedScreen";

#endif

}

void QTransformedScreenPrivate::configure()

{

    // ###: works because setTransformation recalculates unconditionally

    q->setTransformation(transformation);

}

/*!

    Destroys the QTransformedScreen object.

*/

QTransformedScreen::~QTransformedScreen()

{

    delete d_ptr;

}

static int getDisplayId(const QString &spec)

{

    QRegExp regexp(QLatin1String(":(\\d+)\\b"));

    if (regexp.lastIndexIn(spec) != -1) {

        const QString capture = regexp.cap(1);

        return capture.toInt();

    }

    return 0;

}

static QTransformedScreen::Transformation filterTransformation(QString &spec)

{

    QRegExp regexp(QLatin1String("\\bRot(\\d+):?\\b"), Qt::CaseInsensitive);

    if (regexp.indexIn(spec) == -1)

        return QTransformedScreen::None;

    const int degrees = regexp.cap(1).toInt();

    spec.remove(regexp.pos(0), regexp.matchedLength());

    return static_cast<QTransformedScreen::Transformation>(degrees / 90);

}

/*!

    \reimp

*/

bool QTransformedScreen::connect(const QString &displaySpec)

{

    QString dspec = displaySpec.trimmed();

    if (dspec.startsWith(QLatin1String("Transformed:"), Qt::CaseInsensitive))

        dspec = dspec.mid(QString::fromLatin1("Transformed:").size());

    else if (!dspec.compare(QLatin1String("Transformed"), Qt::CaseInsensitive))

        dspec = QString();

    const QString displayIdSpec = QString::fromLatin1(" :%1").arg(displayId);

    if (dspec.endsWith(displayIdSpec))

        dspec = dspec.left(dspec.size() - displayIdSpec.size());

    d_ptr->transformation = filterTransformation(dspec);

    QString driver = dspec;

    int colon = driver.indexOf(QLatin1Char(':'));

    if (colon >= 0)

        driver.truncate(colon);

    if (!QScreenDriverFactory::keys().contains(driver, Qt::CaseInsensitive))

        if (!dspec.isEmpty())

            dspec.prepend(QLatin1Char(':'));

    const int id = getDisplayId(dspec);

    QScreen *s = qt_get_screen(id, dspec.toLatin1().constData());

    setScreen(s);

#ifdef QT_QWS_DEPTH_GENERIC

    d_ptr->doGenericColors = dspec.contains(QLatin1String("genericcolors"));

#endif

    d_ptr->configure();

    // XXX

    qt_screen = this;

    return true;

}

/*!

    Returns the currently set rotation.

    \sa setTransformation(), QScreen::transformOrientation()

*/

QTransformedScreen::Transformation QTransformedScreen::transformation() const

{

    return d_ptr->transformation;

}

/*!

    \reimp

*/

int QTransformedScreen::transformOrientation() const

{

    return (int)d_ptr->transformation;

}

/*!

    \reimp

*/

void QTransformedScreen::exposeRegion(QRegion region, int changing)

{

    if (!data || d_ptr->transformation == None) {

        QProxyScreen::exposeRegion(region, changing);

        return;

    }

    QScreen::exposeRegion(region, changing);

}

/*!

    Rotates this screen object according to the specified \a transformation.

    \sa transformation()

*/

void QTransformedScreen::setTransformation(Transformation transformation)

{

    d_ptr->transformation = transformation;

    QSize size = mapFromDevice(QSize(dw, dh));

    w = size.width();

    h = size.height();

    const QScreen *s = screen();

    size = mapFromDevice(QSize(s->physicalWidth(), s->physicalHeight()));

    physWidth = size.width();

    physHeight = size.height();

#ifdef QT_REGION_DEBUG

    qDebug() << "QTransformedScreen::setTransformation" << transformation

             << "size" << w << h << "dev size" << dw << dh;

#endif

}

static inline QRect correctNormalized(const QRect &r) {

    const int x1 = qMin(r.left(), r.right());

    const int x2 = qMax(r.left(), r.right());

    const int y1 = qMin(r.top(), r.bottom());

    const int y2 = qMax(r.top(), r.bottom());

    return QRect( QPoint(x1,y1), QPoint(x2,y2) );

}

template <class DST, class SRC>

static inline void blit90(QScreen *screen, const QImage &image,

                          const QRect &rect, const QPoint &topLeft)

{

    const SRC *src = (const SRC*)(image.scanLine(rect.top())) + rect.left();

    DST *dest = (DST*)(screen->base() + topLeft.y() * screen->linestep())

                + topLeft.x();

    qt_memrotate90(src, rect.width(), rect.height(), image.bytesPerLine(),

                   dest, screen->linestep());

}

template <class DST, class SRC>

static inline void blit180(QScreen *screen, const QImage &image,

                           const QRect &rect, const QPoint &topLeft)

{

    const SRC *src = (const SRC*)(image.scanLine(rect.top())) + rect.left();

    DST *dest = (DST*)(screen->base() + topLeft.y() * screen->linestep())

                + topLeft.x();

    qt_memrotate180(src, rect.width(), rect.height(), image.bytesPerLine(),

                    dest, screen->linestep());

}

template <class DST, class SRC>

static inline void blit270(QScreen *screen, const QImage &image,

                           const QRect &rect, const QPoint &topLeft)

{

    const SRC *src = (const SRC *)(image.scanLine(rect.top())) + rect.left();

    DST *dest = (DST*)(screen->base() + topLeft.y() * screen->linestep())

                + topLeft.x();

    qt_memrotate270(src, rect.width(), rect.height(), image.bytesPerLine(),

                    dest, screen->linestep());

}

typedef void (*BlitFunc)(QScreen *, const QImage &, const QRect &, const QPoint &);

#define SET_BLIT_FUNC(dst, src, rotation, func) \

do {                                            \

    switch (rotation) {                         \

    case Rot90:                                 \

        func = blit90<dst, src>;                \

        break;                                  \

    case Rot180:                                \

        func = blit180<dst, src>;               \

        break;                                  \

    case Rot270:                                \

        func = blit270<dst, src>;               \

        break;                                  \

    default:                                    \

        break;                                  \

    }                                           \

} while (0)

/*!

    \reimp

*/

void QTransformedScreen::blit(const QImage &image, const QPoint &topLeft,

                              const QRegion &region)

{

    const Transformation trans = d_ptr->transformation;

    if (trans == None) {

        QProxyScreen::blit(image, topLeft, region);

        return;

    }

    const QVector<QRect> rects = region.rects();

    const QRect bound = QRect(0, 0, QScreen::w, QScreen::h)

                        & QRect(topLeft, image.size());

    BlitFunc func = 0;

#ifdef QT_QWS_DEPTH_GENERIC

    if (d_ptr->doGenericColors && depth() == 16) {

        if (image.depth() == 16)

            SET_BLIT_FUNC(qrgb_generic16, quint16, trans, func);

        else

            SET_BLIT_FUNC(qrgb_generic16, quint32, trans, func);

    } else

#endif

    switch (depth()) {

#ifdef QT_QWS_DEPTH_32

    case 32:

#ifdef QT_QWS_DEPTH_16

        if (image.depth() == 16)

            SET_BLIT_FUNC(quint32, quint16, trans, func);

        else

#endif

            SET_BLIT_FUNC(quint32, quint32, trans, func);

        break;

#endif

#if defined(QT_QWS_DEPTH_24) || defined(QT_QWS_DEPTH18)

    case 24:

    case 18:

        SET_BLIT_FUNC(quint24, quint24, trans, func);

        break;

#endif

#if defined(QT_QWS_DEPTH_16) || defined(QT_QWS_DEPTH_15) || defined(QT_QWS_DEPTH_12)

    case 16:

#if defined QT_QWS_ROTATE_BGR

        if (pixelType() == BGRPixel && image.depth() == 16) {

            SET_BLIT_FUNC(qbgr565, quint16, trans, func);

            break;

        } //fall-through here!!!

#endif

    case 15:

#if defined QT_QWS_ROTATE_BGR

        if (pixelType() == BGRPixel && image.format() == QImage::Format_RGB555) {

            SET_BLIT_FUNC(qbgr555, qrgb555, trans, func);

            break;

        } //fall-through here!!!

#endif

    case 12:

        if (image.depth() == 16)

            SET_BLIT_FUNC(quint16, quint16, trans, func);

        else

            SET_BLIT_FUNC(quint16, quint32, trans, func);

        break;

#endif

#ifdef QT_QWS_DEPTH_8

    case 8:

        if (image.format() == QImage::Format_RGB444)

            SET_BLIT_FUNC(quint8, qrgb444, trans, func);

        else if (image.depth() == 16)

            SET_BLIT_FUNC(quint8, quint16, trans, func);

        else

            SET_BLIT_FUNC(quint8, quint32, trans, func);

        break;

#endif

    default:

        return;

    }

    if (!func)

        return;

    QWSDisplay::grab();

    for (int i = 0; i < rects.size(); ++i) {

        const QRect r = rects.at(i) & bound;

        QPoint dst;

        switch (trans) {

        case Rot90:

            dst = mapToDevice(r.topRight(), QSize(w, h));

            break;

        case Rot180:

            dst = mapToDevice(r.bottomRight(), QSize(w, h));

            break;

        case Rot270:

            dst = mapToDevice(r.bottomLeft(), QSize(w, h));

            break;

        default:

            break;

        }

        func(this, image, r.translated(-topLeft), dst);

    }

    QWSDisplay::ungrab();

}

/*!

    \reimp

*/

void QTransformedScreen::solidFill(const QColor &color, const QRegion &region)

{

    const QRegion tr = mapToDevice(region, QSize(w,h));

    Q_ASSERT(tr.boundingRect() == mapToDevice(region.boundingRect(), QSize(w,h)));

#ifdef QT_REGION_DEBUG

    qDebug() << "QTransformedScreen::solidFill region" << region << "transformed" << tr;

#endif

    QProxyScreen::solidFill(color, tr);

}

/*!

    \reimp

*/

QSize QTransformedScreen::mapToDevice(const QSize &s) const

{

    switch (d_ptr->transformation) {

    case None:

    case Rot180:

        break;

    case Rot90:

    case Rot270:

        return QSize(s.height(), s.width());

        break;

    }

    return s;

}

/*!

    \reimp

*/

QSize QTransformedScreen::mapFromDevice(const QSize &s) const

{

    switch (d_ptr->transformation) {

    case None:

    case Rot180:

        break;

    case Rot90:

    case Rot270:

        return QSize(s.height(), s.width());

        break;

    }

    return s;

}

/*!

    \reimp

*/

QPoint QTransformedScreen::mapToDevice(const QPoint &p, const QSize &s) const

{

    QPoint rp(p);

    switch (d_ptr->transformation) {

    case None:

        break;

    case Rot90:

        rp.setX(p.y());

        rp.setY(s.width() - p.x() - 1);

        break;

    case Rot180:

        rp.setX(s.width() - p.x() - 1);

        rp.setY(s.height() - p.y() - 1);

        break;