/****************************************************************************
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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****************************************************************************/

#include <QtGui/qpaintdevice.h>
#include <QtGui/qpixmap.h>
#include <QtGui/qwidget.h>
#include "qegl_p.h"

#if !defined(QT_NO_EGL)

#include <qscreen_qws.h>
#include <qscreenproxy_qws.h>
#include <qapplication.h>
#include <qdesktopwidget.h>

QT_BEGIN_NAMESPACE

// Create the surface for a QPixmap, QImage, or QWidget.
// We don't have QGLScreen to create EGL surfaces for us,
// so surface creation needs to be done in QtOpenGL or
// QtOpenVG for Qt/Embedded.
bool QEglContext::createSurface(QPaintDevice *device, const QEglProperties *properties)
{
    Q_UNUSED(device);
    Q_UNUSED(properties);
    return false;
}

EGLDisplay QEglContext::getDisplay(QPaintDevice *device)
{
    Q_UNUSED(device);
    return eglGetDisplay(EGLNativeDisplayType(EGL_DEFAULT_DISPLAY));
}

static QScreen *screenForDevice(QPaintDevice *device)
{
    QScreen *screen = qt_screen;
    if (!screen)
        return 0;
    if (screen->classId() == QScreen::MultiClass) {
        int screenNumber;
        if (device && device->devType() == QInternal::Widget)
            screenNumber = qApp->desktop()->screenNumber(static_cast<QWidget *>(device));
        else
            screenNumber = 0;
        screen = screen->subScreens()[screenNumber];
    }
    while (screen->classId() == QScreen::ProxyClass) {
        screen = static_cast<QProxyScreen *>(screen)->screen();
    }
    return screen;
}

// Set pixel format and other properties based on a paint device.
void QEglProperties::setPaintDeviceFormat(QPaintDevice *dev)
{
    if (!dev)
        return;

    // Find the QGLScreen for this paint device.
    QScreen *screen = screenForDevice(dev);
    if (!screen)
        return;
    int devType = dev->devType();
    if (devType == QInternal::Image)
        setPixelFormat(static_cast<QImage *>(dev)->format());
    else
        setPixelFormat(screen->pixelFormat());
}

QT_END_NAMESPACE

#endif // !QT_NO_EGL