/*  This file is part of the KDE project.

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

This library is free software: you can redistribute it and/or modify

it under the terms of the GNU Lesser General Public License as published by

the Free Software Foundation, either version 2.1 or 3 of the License.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License

along with this library.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "videorenderer_default.h"

#ifndef QT_NO_PHONON_VIDEO

#include <QtGui/QWidget>

#include <QtGui/QPainter>

#include <uuids.h>

QT_BEGIN_NAMESPACE

namespace Phonon

{

    namespace DS9

    {

        VideoRendererDefault::~VideoRendererDefault()

        {

        }

        bool VideoRendererDefault::isNative() const

        {

            return true;

        }

        VideoRendererDefault::VideoRendererDefault(QWidget *target) : m_target(target)

        {

            m_target->setAttribute(Qt::WA_PaintOnScreen, true);

            m_filter = Filter(CLSID_VideoRenderer, IID_IBaseFilter);

        }

        QSize VideoRendererDefault::videoSize() const

        {

            LONG w = 0,

                h = 0;

            ComPointer<IBasicVideo> basic(m_filter, IID_IBasicVideo);

            if (basic) {

                basic->GetVideoSize( &w, &h);

            }

            return QSize(w, h);

        }

        void VideoRendererDefault::repaintCurrentFrame(QWidget * /*target*/, const QRect & /*rect*/)

        {

            //nothing to do here: the renderer paints everything

        }

        void VideoRendererDefault::notifyResize(const QSize &size, Phonon::VideoWidget::AspectRatio aspectRatio,

            Phonon::VideoWidget::ScaleMode scaleMode)

        {

            if (!isActive()) {

                ComPointer<IBasicVideo> basic(m_filter, IID_IBasicVideo);

                if (basic) {

                    basic->SetDestinationPosition(0, 0, 0, 0);

                }

                return;

            }

            ComPointer<IVideoWindow> video(m_filter, IID_IVideoWindow);

            OAHWND owner;

            HRESULT hr = video->get_Owner(&owner);

            if (FAILED(hr)) {

                return;

            }

            const OAHWND newOwner = reinterpret_cast<OAHWND>(m_target->winId());

            if (owner != newOwner) {

                video->put_Owner(newOwner);

                video->put_MessageDrain(newOwner);

                video->put_WindowStyle(WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS);

            }

            //make sure the widget takes the whole size of the parent

            video->SetWindowPosition(0, 0, size.width(), size.height());

            const QSize vsize = videoSize();

            internalNotifyResize(size, vsize, aspectRatio, scaleMode);

            ComPointer<IBasicVideo> basic(m_filter, IID_IBasicVideo);

            if (basic) {

                basic->SetDestinationPosition(m_dstX, m_dstY, m_dstWidth, m_dstHeight);

            }

        }

        void VideoRendererDefault::applyMixerSettings(qreal /*brightness*/, qreal /*contrast*/, qreal /*m_hue*/, qreal /*saturation*/)

        {

            //this can't be supported for the default renderer

        }

        QImage VideoRendererDefault::snapshot() const

        {

            ComPointer<IBasicVideo> basic(m_filter, IID_IBasicVideo);

            if (basic) {

                LONG bufferSize = 0;

                //1st we get the buffer size

                basic->GetCurrentImage(&bufferSize, 0);

                QByteArray buffer;

                buffer.resize(bufferSize);

                HRESULT hr = basic->GetCurrentImage(&bufferSize, reinterpret_cast<long*>(buffer.data()));

                if (SUCCEEDED(hr)) {

                    const BITMAPINFOHEADER  *bmi = reinterpret_cast<const BITMAPINFOHEADER*>(buffer.constData());

                    const int w = qAbs(bmi->biWidth),

                        h = qAbs(bmi->biHeight);

                    // Create image and copy data into image.

                    QImage ret(w, h, QImage::Format_RGB32);

                    if (!ret.isNull()) {

                        const char *data = buffer.constData() + bmi->biSize;

                        const int bytes_per_line = w * sizeof(QRgb);

                        for (int y = h - 1; y >= 0; --y) {

                            qMemCopy(ret.scanLine(y), //destination

                                data,     //source

                                bytes_per_line);

                            data += bytes_per_line;

                        }

                    }

                    return ret;

                }

            }

            return QImage();

        }

    }

}

QT_END_NAMESPACE

#endif //QT_NO_PHONON_VIDEO