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** 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

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#include <private/qgraphicssystem_runtime_p.h>

#include <private/qgraphicssystem_raster_p.h>

#include <private/qgraphicssystemfactory_p.h>

#include <private/qapplication_p.h>

#include <private/qwidget_p.h>

#include <QtCore/QDebug>

#include <QtCore/QTimer>

#include <QtGui/QBitmap>

QT_BEGIN_NAMESPACE

static int qt_pixmap_serial = 0;

#define READBACK(f)                                         \

    m_graphicsSystem->decreaseMemoryUsage(memoryUsage());   \

    f                                                       \

    readBackInfo();                                         \

    m_graphicsSystem->increaseMemoryUsage(memoryUsage());   \

class QDeferredGraphicsSystemChange : public QObject

{

    Q_OBJECT

public:

    QDeferredGraphicsSystemChange(QRuntimeGraphicsSystem *gs, const QString& graphicsSystemName)

    : m_graphicsSystem(gs), m_graphicsSystemName(graphicsSystemName)

    {

    }

    void launch()

    {

        QTimer::singleShot(0, this, SLOT(doChange()));

    }

private slots:

    void doChange()

    {

        m_graphicsSystem->setGraphicsSystem(m_graphicsSystemName);

        deleteLater();

    }

private:

    QRuntimeGraphicsSystem *m_graphicsSystem;

    QString m_graphicsSystemName;

};

QRuntimePixmapData::QRuntimePixmapData(const QRuntimeGraphicsSystem *gs, PixelType type)

        : QPixmapData(type, RuntimeClass), m_graphicsSystem(gs)

{

    setSerialNumber(++qt_pixmap_serial);

}

QRuntimePixmapData::~QRuntimePixmapData()

{

    m_graphicsSystem->removePixmapData(this);

    delete m_data;

}

void QRuntimePixmapData::readBackInfo()

{

    w = m_data->width();

    h = m_data->height();

    d = m_data->depth();

    is_null = m_data->isNull();

}

QPixmapData *QRuntimePixmapData::createCompatiblePixmapData() const

{

    QRuntimePixmapData *rtData = new QRuntimePixmapData(m_graphicsSystem, pixelType());

    rtData->m_data = m_data->createCompatiblePixmapData();

    return rtData;

}

void QRuntimePixmapData::resize(int width, int height)

{

    READBACK(

        m_data->resize(width, height);

    )

}

void QRuntimePixmapData::fromImage(const QImage &image,

                                   Qt::ImageConversionFlags flags)

{

    READBACK(

        m_data->fromImage(image, flags);

    )

}

bool QRuntimePixmapData::fromFile(const QString &filename, const char *format,

                                  Qt::ImageConversionFlags flags)

{

    bool success(false);

    READBACK(

        success = m_data->fromFile(filename, format, flags);

    )

    return success;

}

bool QRuntimePixmapData::fromData(const uchar *buffer, uint len, const char *format,

                                  Qt::ImageConversionFlags flags)

{

    bool success(false);

    READBACK(

        success = m_data->fromData(buffer, len, format, flags);

    )

    return success;

}

void QRuntimePixmapData::copy(const QPixmapData *data, const QRect &rect)

{

    if (data->runtimeData()) {

        READBACK(

            m_data->copy(data->runtimeData(), rect);

        )

    } else {

        READBACK(

            m_data->copy(data, rect);

        )

    }

}

bool QRuntimePixmapData::scroll(int dx, int dy, const QRect &rect)

{

    return m_data->scroll(dx, dy, rect);

}

int QRuntimePixmapData::metric(QPaintDevice::PaintDeviceMetric metric) const

{

    return m_data->metric(metric);

}

void QRuntimePixmapData::fill(const QColor &color)

{

    return m_data->fill(color);

}

QBitmap QRuntimePixmapData::mask() const

{

    return m_data->mask();

}

void QRuntimePixmapData::setMask(const QBitmap &mask)

{

    READBACK(

        m_data->setMask(mask);

    )

}

bool QRuntimePixmapData::hasAlphaChannel() const

{

    return m_data->hasAlphaChannel();

}

QPixmap QRuntimePixmapData::transformed(const QTransform &matrix,

                                        Qt::TransformationMode mode) const

{

    return m_data->transformed(matrix, mode);

}

void QRuntimePixmapData::setAlphaChannel(const QPixmap &alphaChannel)

{

    READBACK(

        m_data->setAlphaChannel(alphaChannel);

    )

}

QPixmap QRuntimePixmapData::alphaChannel() const

{

    return m_data->alphaChannel();

}

QImage QRuntimePixmapData::toImage() const

{

    return m_data->toImage();

}

QPaintEngine* QRuntimePixmapData::paintEngine() const

{

    return m_data->paintEngine();

}

QImage* QRuntimePixmapData::buffer()

{

    return m_data->buffer();

}

#if defined(Q_OS_SYMBIAN)

void* QRuntimePixmapData::toNativeType(NativeType type)

{

    return m_data->toNativeType(type);

}

void QRuntimePixmapData::fromNativeType(void *pixmap, NativeType type)

{

    m_data->fromNativeType(pixmap, type);

    readBackInfo();

}

#endif

QPixmapData* QRuntimePixmapData::runtimeData() const

{

    return m_data;

}

uint QRuntimePixmapData::memoryUsage() const

{

    if(is_null || d == 0)

        return 0;

    return w * h * (d / 8);

}

QRuntimeWindowSurface::QRuntimeWindowSurface(const QRuntimeGraphicsSystem *gs, QWidget *window)

    : QWindowSurface(window), m_windowSurface(0), m_pendingWindowSurface(0), m_graphicsSystem(gs)

{

}

QRuntimeWindowSurface::~QRuntimeWindowSurface()

{

    m_graphicsSystem->removeWindowSurface(this);

    delete m_windowSurface;

}

QPaintDevice *QRuntimeWindowSurface::paintDevice()

{

    return m_windowSurface->paintDevice();

}

void QRuntimeWindowSurface::flush(QWidget *widget, const QRegion &region,

                                  const QPoint &offset)

{

    m_windowSurface->flush(widget, region, offset);

    int destroyPolicy = m_graphicsSystem->windowSurfaceDestroyPolicy();

    if(m_pendingWindowSurface &&

        destroyPolicy == QRuntimeGraphicsSystem::DestroyAfterFirstFlush) {

#ifdef QT_DEBUG

        qDebug() << "QRuntimeWindowSurface::flush() - destroy pending window surface";

#endif

        delete m_pendingWindowSurface;

        m_pendingWindowSurface = 0;

    }

}

void QRuntimeWindowSurface::setGeometry(const QRect &rect)

{

    m_graphicsSystem->decreaseMemoryUsage(memoryUsage());

    m_windowSurface->setGeometry(rect);

    m_graphicsSystem->increaseMemoryUsage(memoryUsage());

}

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

{

    return m_windowSurface->scroll(area, dx, dy);

}

void QRuntimeWindowSurface::beginPaint(const QRegion &rgn)

{

    m_windowSurface->beginPaint(rgn);

}

void QRuntimeWindowSurface::endPaint(const QRegion &rgn)

{

    m_windowSurface->endPaint(rgn);

}

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

{

    return m_windowSurface->buffer(widget);

}

QPixmap QRuntimeWindowSurface::grabWidget(const QWidget *widget, const QRect& rectangle) const

{

    return m_windowSurface->grabWidget(widget, rectangle);

}

QPoint QRuntimeWindowSurface::offset(const QWidget *widget) const

{

    return m_windowSurface->offset(widget);

}

uint QRuntimeWindowSurface::memoryUsage() const

{

    QPaintDevice *pdev = m_windowSurface->paintDevice();

    if (pdev && pdev->depth() != 0)

        return pdev->width() * pdev->height() * (pdev->depth()/8);

    return 0;

}

QRuntimeGraphicsSystem::QRuntimeGraphicsSystem()

    : m_memoryUsage(0), m_windowSurfaceDestroyPolicy(DestroyImmediately),

	m_graphicsSystem(0), m_graphicsSystemChangeMemoryLimit(0)

{

    QApplicationPrivate::graphics_system_name = QLatin1String("runtime");

    QApplicationPrivate::runtime_graphics_system = true;

#ifdef Q_OS_SYMBIAN

    m_graphicsSystemName = QLatin1String("openvg");

    m_windowSurfaceDestroyPolicy = DestroyAfterFirstFlush;

#else

    m_graphicsSystemName = QLatin1String("raster");

#endif

    m_graphicsSystem = QGraphicsSystemFactory::create(m_graphicsSystemName);

}

QPixmapData *QRuntimeGraphicsSystem::createPixmapData(QPixmapData::PixelType type) const

{

    Q_ASSERT(m_graphicsSystem);

    QPixmapData *data = m_graphicsSystem->createPixmapData(type);

    QRuntimePixmapData *rtData = new QRuntimePixmapData(this, type);

    rtData->m_data = data;

    m_pixmapDatas << rtData;

    return rtData;

}

QWindowSurface *QRuntimeGraphicsSystem::createWindowSurface(QWidget *widget) const

{

    Q_ASSERT(m_graphicsSystem);

    QRuntimeWindowSurface *rtSurface = new QRuntimeWindowSurface(this, widget);

    rtSurface->m_windowSurface = m_graphicsSystem->createWindowSurface(widget);

    widget->setWindowSurface(rtSurface);

    m_windowSurfaces << rtSurface;

    increaseMemoryUsage(rtSurface->memoryUsage());

    return rtSurface;

}

/*!

    Sets graphics system when resource memory consumption is under /a memoryUsageLimit.

*/

void QRuntimeGraphicsSystem::setGraphicsSystem(const QString &name, uint memoryUsageLimit)

{

#ifdef QT_DEBUG

    qDebug() << "QRuntimeGraphicsSystem::setGraphicsSystem( "<< name <<", " << memoryUsageLimit << ")";

    qDebug() << "        current approximated graphics system memory usage " << memoryUsage() << " bytes";

#endif

    if (memoryUsage() >= memoryUsageLimit) {

        m_graphicsSystemChangeMemoryLimit = memoryUsageLimit;

        m_pendingGraphicsSystemName = name;

    } else {

        setGraphicsSystem(name);

    }

}

void QRuntimeGraphicsSystem::setGraphicsSystem(const QString &name)

{

    if (m_graphicsSystemName == name)

        return;

#ifdef QT_DEBUG

    qDebug() << "QRuntimeGraphicsSystem::setGraphicsSystem( " << name << " )";

    qDebug() << "        current approximated graphics system memory usage "<< memoryUsage() << " bytes";

#endif

    delete m_graphicsSystem;

    m_graphicsSystem = QGraphicsSystemFactory::create(name);

    m_graphicsSystemName = name;

    Q_ASSERT(m_graphicsSystem);

    m_graphicsSystemChangeMemoryLimit = 0;

    m_pendingGraphicsSystemName = QString();

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

        QRuntimePixmapData *proxy = m_pixmapDatas.at(i);

        QPixmapData *newData = m_graphicsSystem->createPixmapData(proxy->m_data);

        // ### TODO Optimize. Openvg and s60raster graphics systems could switch internal ARGB32_PRE QImage buffers.

        newData->fromImage(proxy->m_data->toImage(), Qt::NoOpaqueDetection);

        delete proxy->m_data;

        proxy->m_data = newData;

        proxy->readBackInfo();

    }

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

        QRuntimeWindowSurface *proxy = m_windowSurfaces.at(i);

        QWidget *widget = proxy->m_windowSurface->window();

        if(m_windowSurfaceDestroyPolicy == DestroyImmediately) {

            delete proxy->m_windowSurface;

            proxy->m_pendingWindowSurface = 0;

        } else {

            proxy->m_pendingWindowSurface = proxy->m_windowSurface;

        }

        proxy->m_windowSurface = m_graphicsSystem->createWindowSurface(widget);

        qt_widget_private(widget)->invalidateBuffer(widget->rect());

    }

}

void QRuntimeGraphicsSystem::removePixmapData(QRuntimePixmapData *pixmapData) const

{

    int index = m_pixmapDatas.lastIndexOf(pixmapData);

    m_pixmapDatas.removeAt(index);

    decreaseMemoryUsage(pixmapData->memoryUsage(), true);

}

void QRuntimeGraphicsSystem::removeWindowSurface(QRuntimeWindowSurface *windowSurface) const

{

    int index = m_windowSurfaces.lastIndexOf(windowSurface);

    m_windowSurfaces.removeAt(index);

    decreaseMemoryUsage(windowSurface->memoryUsage(), true);

}

void QRuntimeGraphicsSystem::increaseMemoryUsage(uint amount) const

{

    m_memoryUsage += amount;

    if (m_graphicsSystemChangeMemoryLimit &&

        m_memoryUsage < m_graphicsSystemChangeMemoryLimit) {

        QRuntimeGraphicsSystem *gs = const_cast<QRuntimeGraphicsSystem*>(this);

        QDeferredGraphicsSystemChange *deferredChange =

                    new QDeferredGraphicsSystemChange(gs, m_pendingGraphicsSystemName);

        deferredChange->launch();

    }

}

void QRuntimeGraphicsSystem::decreaseMemoryUsage(uint amount, bool persistent) const

{

    m_memoryUsage -= amount;

    if (persistent && m_graphicsSystemChangeMemoryLimit &&

        m_memoryUsage < m_graphicsSystemChangeMemoryLimit) {

        QRuntimeGraphicsSystem *gs = const_cast<QRuntimeGraphicsSystem*>(this);

        QDeferredGraphicsSystemChange *deferredChange =

                    new QDeferredGraphicsSystemChange(gs, m_pendingGraphicsSystemName);

        deferredChange->launch();

    }

}

#include "qgraphicssystem_runtime.moc"

QT_END_NAMESPACE