/****************************************************************************

**

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtGui module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "qscreen_qws.h"

#include "qcolormap.h"

#include "qscreendriverfactory_qws.h"

#include "qwindowsystem_qws.h"

#include "qwidget.h"

#include "qcolor.h"

#include "qpixmap.h"

#include "qvarlengtharray.h"

#include "qwsdisplay_qws.h"

#include "qpainter.h"

#include <private/qdrawhelper_p.h>

#include <private/qpaintengine_raster_p.h>

#include <private/qpixmap_raster_p.h>

#include <private/qwindowsurface_qws_p.h>

#include <private/qpainter_p.h>

#include <private/qwidget_p.h>

#include <private/qgraphicssystem_qws_p.h>

QT_BEGIN_NAMESPACE

// #define QT_USE_MEMCPY_DUFF

#ifndef QT_NO_QWS_CURSOR

bool qt_sw_cursor=false;

Q_GUI_EXPORT QScreenCursor * qt_screencursor = 0;

#endif

Q_GUI_EXPORT QScreen * qt_screen = 0;

ClearCacheFunc QScreen::clearCacheFunc = 0;

#ifndef QT_NO_QWS_CURSOR

/*!

    \class QScreenCursor

    \ingroup qws

    \brief The QScreenCursor class is a base class for screen cursors

    in Qt for Embedded Linux.

    Note that this class is non-portable, and that it is only

    available in \l{Qt for Embedded Linux}.

    QScreenCursor implements a software cursor, but can be subclassed

    to support hardware cursors as well. When deriving from the

    QScreenCursor class it is important to maintain the cursor's

    image, position, hot spot (the point within the cursor's image

    that will be the position of the associated mouse events) and

    visibility as well as informing whether it is hardware accelerated

    or not.

    Note that there may only be one screen cursor at a time. Use the

    static instance() function to retrieve a pointer to the current

    screen cursor. Typically, the cursor is constructed by the QScreen

    class or one of its descendants when it is initializing the

    device; the QScreenCursor class should never be instantiated

    explicitly.

    Use the move() function to change the position of the cursor, and

    the set() function to alter its image or its hot spot. In

    addition, you can find out whether the cursor is accelerated or

    not, using the isAccelerated() function, and the boundingRect()

    function returns the cursor's bounding rectangle.

    The cursor's appearance can be controlled using the isVisible(),

    hide() and show() functions; alternatively the QWSServer class

    provides some means of controlling the cursor's appearance using

    the QWSServer::isCursorVisible() and QWSServer::setCursorVisible()

    functions.

    \sa QScreen, QWSServer

*/

/*!

    \fn static QScreenCursor* QScreenCursor::instance()

    \since 4.2

    Returns a pointer to the application's unique screen cursor.

*/

extern bool qws_sw_cursor;

/*!

    Constructs a screen cursor

*/

QScreenCursor::QScreenCursor()

{

    pos = QPoint(qt_screen->deviceWidth()/2, qt_screen->deviceHeight()/2);

    size = QSize(0,0);

    enable = true;

    hwaccel = false;

    supportsAlpha = true;

}

/*!

    Destroys the screen cursor.

*/

QScreenCursor::~QScreenCursor()

{

}

/*!

    Hides the cursor from the screen.

    \sa show()

*/

void QScreenCursor::hide()

{

    if (enable) {

        enable = false;

        if (!hwaccel)

            qt_screen->exposeRegion(boundingRect(), 0);

    }

}

/*!

    Shows the mouse cursor.

    \sa hide()

*/

void QScreenCursor::show()

{

    if (!enable) {

        enable = true;

        if (!hwaccel)

            qt_screen->exposeRegion(boundingRect(), 0);

    }

}

/*!

    Sets the cursor's image to be the given \a image.

    The \a hotx and \a hoty parameters define the cursor's hot spot,

    i.e., the point within the cursor's image that will be the

    position of the associated mouse events.

    \sa move()

*/

void QScreenCursor::set(const QImage &image, int hotx, int hoty)

{

    const QRect r = boundingRect();

    hotspot = QPoint(hotx, hoty);

    // These are in almost all cases the fastest formats to blend

    QImage::Format f;

    switch (qt_screen->depth()) {

    case 12:

        f = QImage::Format_ARGB4444_Premultiplied;

        break;

    case 15:

        f =  QImage::Format_ARGB8555_Premultiplied;

        break;

    case 16:

        f = QImage::Format_ARGB8565_Premultiplied;

        break;

    case 18:

        f = QImage::Format_ARGB6666_Premultiplied;

        break;

    default:

        f =  QImage::Format_ARGB32_Premultiplied;

    }

    cursor = image.convertToFormat(f);

    size = image.size();

    if (enable && !hwaccel)

        qt_screen->exposeRegion(r | boundingRect(), 0);

}

/*!

    Moves the mouse cursor to the given position, i.e., (\a x, \a y).

    Note that the given position defines the top-left corner of the

    cursor's image, i.e., not the cursor's hot spot (the position of

    the associated mouse events).

    \sa set()

*/

void QScreenCursor::move(int x, int y)

{

    QRegion r = boundingRect();

    pos = QPoint(x,y);

    if (enable && !hwaccel) {

        r |= boundingRect();

        qt_screen->exposeRegion(r, 0);

    }

}

/*!

    \fn void QScreenCursor::initSoftwareCursor ()

    Initializes the screen cursor.

    This function is typically called from the screen driver when

    initializing the device. Alternatively, the cursor can be set

    directly using the pointer returned by the static instance()

    function.

    \sa QScreen::initDevice()

*/

void QScreenCursor::initSoftwareCursor()

{

    qt_screencursor = new QScreenCursor;

}

#endif // QT_NO_QWS_CURSOR

/*!

    \fn QRect QScreenCursor::boundingRect () const

    Returns the cursor's bounding rectangle.

*/

/*!

    \internal

    \fn bool QScreenCursor::enabled ()

*/

/*!

    \fn QImage QScreenCursor::image () const

    Returns the cursor's image.

*/

/*!

    \fn bool QScreenCursor::isAccelerated () const

    Returns true if the cursor is accelerated; otherwise false.

*/

/*!

    \fn bool QScreenCursor::isVisible () const

    Returns true if the cursor is visible; otherwise false.

*/

/*!

    \internal

    \fn bool QScreenCursor::supportsAlphaCursor () const

*/

/*

    \variable QScreenCursor::cursor

    \brief the cursor's image.

    \sa image()

*/

/*

    \variable QScreenCursor::size

    \brief the cursor's size

*/

/*

    \variable QScreenCursor::pos

    \brief the cursor's position, i.e., the position of the top-left

    corner of the crsor's image

    \sa set(), move()

*/

/*

    \variable QScreenCursor::hotspot

    \brief the cursor's hotspot, i.e., the point within the cursor's

    image that will be the position of the associated mouse events.

    \sa set(), move()

*/

/*

    \variable QScreenCursor::enable

    \brief whether the cursor is visible or not

    \sa isVisible()

*/

/*

    \variable QScreenCursor::hwaccel

    \brief holds whether the cursor is accelerated or not

    If the cursor is not accelerated, its image will be included by

    the screen when it composites the window surfaces.

    \sa isAccelerated()

*/

/*

    \variable QScreenCursor::supportsAlpha

*/

/*!

    \internal

    \macro qt_screencursor

    \relates QScreenCursor

    A global pointer referring to the unique screen cursor. It is

    equivalent to the pointer returned by the

    QScreenCursor::instance() function.

*/

class QScreenPrivate

{

public:

    QScreenPrivate(QScreen *parent, QScreen::ClassId id = QScreen::CustomClass);

    ~QScreenPrivate();

    inline QImage::Format preferredImageFormat() const;

    typedef void (*SolidFillFunc)(QScreen*, const QColor&, const QRegion&);

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

    SolidFillFunc solidFill;

    BlitFunc blit;

    QPoint offset;

    QList<QScreen*> subScreens;

    QPixmapDataFactory* pixmapFactory;

    QGraphicsSystem* graphicsSystem;

    QWSGraphicsSystem defaultGraphicsSystem; //###

    QImage::Format pixelFormat;

#if Q_BYTE_ORDER == Q_BIG_ENDIAN

    bool fb_is_littleEndian;

#endif

#ifdef QT_QWS_CLIENTBLIT

    bool supportsBlitInClients;

#endif

    int classId;

    QScreen *q_ptr;

};

template <typename T>

static void solidFill_template(QScreen *screen, const QColor &color,

                               const QRegion &region)

{

    T *dest = reinterpret_cast<T*>(screen->base());

    const T c = qt_colorConvert<T, quint32>(color.rgba(), 0);

    const int stride = screen->linestep();

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

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

        const QRect r = rects.at(i);

        qt_rectfill(dest, c, r.x(), r.y(), r.width(), r.height(), stride);

    }

}

#ifdef QT_QWS_DEPTH_GENERIC

static void solidFill_rgb_32bpp(QScreen *screen, const QColor &color,

                                const QRegion &region)

{

    quint32 *dest = reinterpret_cast<quint32*>(screen->base());

    const quint32 c = qt_convertToRgb<quint32>(color.rgba());

    const int stride = screen->linestep();

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

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

        const QRect r = rects.at(i);

        qt_rectfill(dest, c, r.x(), r.y(), r.width(), r.height(), stride);

    }

}

static void solidFill_rgb_16bpp(QScreen *screen, const QColor &color,

                                const QRegion &region)

{

    quint16 *dest = reinterpret_cast<quint16*>(screen->base());

    const quint16 c = qt_convertToRgb<quint32>(color.rgba());

    const int stride = screen->linestep();

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

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

        const QRect r = rects.at(i);

        qt_rectfill(dest, c, r.x(), r.y(), r.width(), r.height(), stride);

    }

}

#endif // QT_QWS_DEPTH_GENERIC

#ifdef QT_QWS_DEPTH_4

static inline void qt_rectfill_gray4(quint8 *dest, quint8 value,

                                     int x, int y, int width, int height,

                                     int stride)

{

    const int pixelsPerByte = 2;

    dest += y * stride + x / pixelsPerByte;

    const int doAlign = x & 1;

    const int doTail = (width - doAlign) & 1;

    const int width8 = (width - doAlign) / pixelsPerByte;

    for (int j = 0; j < height; ++j) {

        if (doAlign)

            *dest = (*dest & 0xf0) | (value & 0x0f);

        if (width8)

            qt_memfill<quint8>(dest + doAlign, value, width8);

        if (doTail) {

            quint8 *d = dest + doAlign + width8;

            *d = (*d & 0x0f) | (value & 0xf0);

        }

        dest += stride;

    }

}

static void solidFill_gray4(QScreen *screen, const QColor &color,

                            const QRegion &region)

{

    quint8 *dest = reinterpret_cast<quint8*>(screen->base());

    const quint8 c = qGray(color.rgba()) >> 4;

    const quint8 c8 = (c << 4) | c;

    const int stride = screen->linestep();

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

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

        const QRect r = rects.at(i);

        qt_rectfill_gray4(dest, c8, r.x(), r.y(), r.width(), r.height(),

                          stride);

    }

}

#endif // QT_QWS_DEPTH_4

#ifdef QT_QWS_DEPTH_1

static inline void qt_rectfill_mono(quint8 *dest, quint8 value,

                                    int x, int y, int width, int height,

                                    int stride)

{

    const int pixelsPerByte = 8;

    const int alignWidth = qMin(width, (8 - (x & 7)) & 7);

    const int doAlign = (alignWidth > 0 ? 1 : 0);

    const int alignStart = pixelsPerByte - 1 - (x & 7);

    const int alignStop = alignStart - (alignWidth - 1);

    const quint8 alignMask = ((1 << alignWidth) - 1) << alignStop;

    const int tailWidth = (width - alignWidth) & 7;

    const int doTail = (tailWidth > 0 ? 1 : 0);

    const quint8 tailMask = (1 << (pixelsPerByte - tailWidth)) - 1;

    const int width8 = (width - alignWidth) / pixelsPerByte;

    dest += y * stride + x / pixelsPerByte;

    stride -= (doAlign + width8);

    for (int j = 0; j < height; ++j) {

        if (doAlign) {

            *dest = (*dest & ~alignMask) | (value & alignMask);

            ++dest;

        }

        if (width8) {

            qt_memfill<quint8>(dest, value, width8);

            dest += width8;

        }

        if (doTail)

            *dest = (*dest & tailMask) | (value & ~tailMask);

        dest += stride;

    }

}

static void solidFill_mono(QScreen *screen, const QColor &color,

                           const QRegion &region)

{

    quint8 *dest = reinterpret_cast<quint8*>(screen->base());

    const quint8 c8 = (qGray(color.rgba()) >> 7) * 0xff;

    const int stride = screen->linestep();

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

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

        const QRect r = rects.at(i);

        qt_rectfill_mono(dest, c8, r.x(), r.y(), r.width(), r.height(),

                         stride);

    }

}

#endif // QT_QWS_DEPTH_1

void qt_solidFill_setup(QScreen *screen, const QColor &color,

                        const QRegion &region)

{

    switch (screen->depth()) {