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#include "qapplication_p.h"
#include "qgraphicssystem_p.h"
#include "qgraphicssystemex_symbian_p.h"
#include "qgraphicssystemhelper_symbian.h"
#include "qt_s60_p.h"
#include "qwidget_p.h"

QT_BEGIN_NAMESPACE

/*!
    \enum QSymbianGraphicsSystemHelper::NativePaintMode

    This enum controls the way in which QWidget paints content from the Qt
    backing store into the corresponding native window surface.

    \value NativePaintModeDefault Default painting behaviour.
    \value NativePaintModeZeroFill Ignore contents of backing store, and
        fill the window surface region with zeroes.
    \value NativePaintModeWriteAlpha By default, alpha values are only copied
        from the backing store into the window surface if the top-level widget
        has the Qt::WA_TranslucentBackground attribute.  If this mode is set,
        alpha values are copied regardless of the value of that attribute.
    \value NativePaintModeDisable Do not paint anything into the native window
        surface.
 */

/*!
    \class QSymbianGraphicsSystemHelper
    \ingroup painting

    \brief QSymbianGraphicsSystemHelper defines functions required by
    QtMultimediaKit in order to enable video rendering.

    This class is not intended for use by applications.
*/

/*!
    Specify whether native focus change events should be ignored by the widget.
*/

void QSymbianGraphicsSystemHelper::setIgnoreFocusChanged(QWidget *widget, bool value)
{
    static_cast<QSymbianControl *>(widget->winId())->setIgnoreFocusChanged(value);
}

/*!
    Set the native paint mode to the specified \a mode.
*/

void QSymbianGraphicsSystemHelper::setNativePaintMode(QWidget *widget, NativePaintMode mode)
{
    QWidgetPrivate *widgetPrivate = qt_widget_private(widget->window());
    widgetPrivate->createExtra();
    QWExtra::NativePaintMode widgetMode = QWExtra::Default;
    switch (mode) {
    case NativePaintModeDefault:
        break;
    case NativePaintModeZeroFill:
        widgetMode = QWExtra::ZeroFill;
        break;
    case NativePaintModeWriteAlpha:
        widgetMode = QWExtra::BlitWriteAlpha;
        break;
    case NativePaintModeDisable:
        widgetMode = QWExtra::Disable;
        break;
    }
    widgetPrivate->extraData()->nativePaintMode = widgetMode;
}

/*!
    Set the native paint mode to the specified \a mode.
*/

void QSymbianGraphicsSystemHelper::setNativePaintMode(WId wid, NativePaintMode mode)
{
    QWidget *window = static_cast<QSymbianControl *>(wid)->widget()->window();
    setNativePaintMode(window, mode);
}

/*!
    Specify whether the widget should receive receive native paint events.

    If enabled, the QWidget::beginNativePaintEvent slot is called before
    content from the backing store is written into the native window
    surface, and QWidget::endNativePaintEvent is called once writing to
    the native window surface is complete.

    This function is intended for use by QWidget clients such as video
    widgets, which wish to use Direct Screen Access to write into the
    native window surface.  Such clients should stop their DSA session on
    receipt of QWidget::beginNativePaintEvent, and re-start it on receipt of
    QWidget::endNativePaintEvent.
*/

void QSymbianGraphicsSystemHelper::setReceiveNativePaintEvents(QWidget *widget, bool value)
{
    QWidgetPrivate *widgetPrivate = qt_widget_private(widget);
    widgetPrivate->createExtra();
    widgetPrivate->extraData()->receiveNativePaintEvents = value;
}

void QSymbianGraphicsSystemHelper::releaseCachedGpuResources()
{
    QSymbianGraphicsSystemEx *ex = static_cast<QSymbianGraphicsSystemEx *>(
        QApplicationPrivate::graphicsSystem()->platformExtension());
    if (ex)
        ex->releaseCachedGpuResources();
}

QT_END_NAMESPACE