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

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbServers module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** 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 developer.feedback@nokia.com.

**

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

#include "hbsgimageiconprocessor_p.h"

#include "hbiconsource_p.h"

#include "hbthemeserverutils_p.h"

#include <QtGlobal>

#include <QDebug>

#include <QFile>

#include <sgresource/sgimage.h>

#include <EGL/egl.h>

#include <VG/openvg.h>

#include <cmath>

static HbNvgEngine nvgEngine;

HbSgImageRenderer* HbSgimageIconProcessor::sgImageRenderer = HbSgImageRenderer::global();

struct HbSgImageClosure

{

    static inline void cleanup(RSgImage *sgImage)

    {

        if (sgImage) { 

            sgImage->Close();

        }

    }

};

const int PIXEL_DEPTH = 4;

const int SGIMAGE_PIXEL_OVERHEAD = 200; //200 bytes of overhead in VideoCore for irregular size images

const int TILE_SIZE_IN_PIXELS = 32 * 32;

/*!

    \fn HbSgimageIconProcessor::HbSgimageIconProcessor()

    Constructor

    \a key denotes the unique identifier for the cache item

    \a options indicate different ways of loading icons

    \a format indicates the icon format e.g. svg/nvg etc.

 */

HbSgimageIconProcessor::HbSgimageIconProcessor(const HbIconKey &key,

        const HbIconLoader::IconLoaderOptions &options,

        const QString &type)

{

    iconKey = key;

    iconOptions = options;

    iconType = type;

    defaultSize = QSize(0, 0);

    sgImageRenderer->initialize();

}

/*!

    \fn HbSgimageIconProcessor::~HbSgimageIconProcessor()

    Destructor

 */

HbSgimageIconProcessor::~HbSgimageIconProcessor()

{

}

/*!

    \fn HbSgimageIconProcessor::createIconData()

    ToDo

    \a iconPath the path to the icon file

 */

bool HbSgimageIconProcessor::createIconData(const QString &iconPath)

{

    if (!iconKey.size.isValid()) {

        return false;

    }

    bool isSgImageCreated = createSgimage(iconPath);

    return isSgImageCreated;

}

/*!

    \fn HbSgimageIconProcessor::createSgimage()

    ToDO

    \a iconPath the path to the icon file

 */

bool HbSgimageIconProcessor::createSgimage(const QString &iconPath)

{

    bool isDefaultSize =  iconKey.size.isNull();

    data.type = INVALID_FORMAT;

    HbIconSource *source = HbThemeServerUtils::getIconSource(iconPath);

    QSizeF size = source->defaultSize();

    defaultSize = size.toSize();

    QSizeF renderSize(defaultSize);

    data.sgImageData.defaultWidth = defaultSize.width();

    data.sgImageData.defaultHeight = defaultSize.height();

    if (!isDefaultSize) {

        renderSize.scale(iconKey.size, iconKey.aspectRatioMode);

    }

    data.sgImageData.width = renderSize.width();

    data.sgImageData.height = renderSize.height();

    //SgDriver is opened only once for the themserver process when the themserver is started.

    //Also eglInitialize is done only once for the theserver process

    //It is closed only when the themeserver is closed.

    // Create RSgImage, specifying ESgUsageBitOpenVgImage and ESgUsageBitOpenVgSurface

    // usage bits so it can be used as a target for OpenVG rendering inside the Theme

    // Server and as an OpenVG image inside the client applications.

    TSgImageInfo info;

    info.iSizeInPixels = TSize(data.sgImageData.width, data.sgImageData.height);

    info.iPixelFormat = ESgPixelFormatARGB_8888_PRE;

    info.iUsage = ESgUsageBitOpenVgImage | ESgUsageBitOpenVgSurface;

    QScopedPointer<RSgImage, HbSgImageClosure> tempSgImage(new  RSgImage);

    RSgImage *sgImage = tempSgImage.data();

    Q_CHECK_PTR(sgImage);

    TInt err = sgImage->Create(info, 0, 0);

    if (err != KErrNone) {

        return false;

    }

    TSgDrawableId sgImageId = sgImage->Id();

    memcpy(&data.sgImageData.id, &sgImageId.iId, sizeof(data.sgImageData.id));

    data.type = SGIMAGE;

    bool success = sgImageRenderer->beginRendering(sgImage);

    if (!success) {

        return false;

    }

    VGfloat color[4] = { 0.0f, 1.0f, 1.0f, 0.0f };  // TODO revert back to white color

    vgSetfv(VG_CLEAR_COLOR, 4, color);

    vgClear(0, 0, data.sgImageData.width, data.sgImageData.height);

    success = renderNvg(byteArray, QRect(0, 0, data.sgImageData.width, data.sgImageData.height),

                        iconKey.aspectRatioMode, iconKey.mirrored);

    if (!success) {

        return false;

    }

    vgFinish();

    // Once finished, release all handles to the image, and shut down EGL.

    // Make a null EGLSurface current to release the current surface before

    // destroying. The RSgImage contents will persist until the RSgImage is closed.

    sgImageRenderer->endRendering();

    tempSgImage.take();

    HbSgImageRenderer::addSgImageToHash(data.sgImageData.id, sgImage);

    return true;

}

/*!

    \fn HbSgimageIconProcessor::mapKeyAspectRatioToNvgAspectRatio()

    maps qt aspect ratio to nvg aspect ratio.

 */

NvgAspectRatioSettings HbSgimageIconProcessor::mapKeyAspectRatioToNvgAspectRatio(

    Qt::AspectRatioMode aspectRatio)

{

    NvgAspectRatioSettings settings;

    switch (aspectRatio) {

    case Qt::IgnoreAspectRatio: {

        settings.nvgAlignStatusAndAspectRatio = HbNvgEngine::NvgPreserveAspectRatioNone;

        settings.type = HbNvgEngine::NvgMeet;

        break;

    }

    case Qt::KeepAspectRatio: {

        settings.nvgAlignStatusAndAspectRatio = HbNvgEngine::NvgPreserveAspectRatioXmidYmid;

        settings.type = HbNvgEngine::NvgMeet;

        break;

    }

    case Qt::KeepAspectRatioByExpanding: {

        settings.nvgAlignStatusAndAspectRatio = HbNvgEngine::NvgPreserveAspectRatioXmidYmid;

        settings.type = HbNvgEngine::NvgSlice;

        break;

    }

    default: {

        settings.nvgAlignStatusAndAspectRatio = HbNvgEngine::NvgPreserveAspectRatioXmidYmid;

        settings.type = HbNvgEngine::NvgMeet;

        break;

    }

    }

    return settings;

}

/*!

    \fn HbSgimageIconProcessor::sharedIconDataCost()

    Returns the size of the Nvg icon data in bytes

 */

int HbSgimageIconProcessor::sharedIconDataCost() const

{

    // here depth is based on pixel format which in this case is EUidPixelFormatRGB_565 which is 2bytes.

    int xTiles = ceil(data.sgImageData.width / 32.0);

    int yTiles = ceil(data.sgImageData.height / 32.0);

    int sizeInPixels =  xTiles * yTiles * TILE_SIZE_IN_PIXELS;

    int sizeInBytes = sizeInPixels * PIXEL_DEPTH;

    return (sizeInBytes  + SGIMAGE_PIXEL_OVERHEAD);

}

/*!

    \fn HbSgimageIconProcessor::sharedIconData()

    Copies the Nvg vector data to the shared memory

 */

HbSharedIconInfo HbSgimageIconProcessor::sharedIconData()const

{

    return data;

}

bool HbSgimageIconProcessor::createMultiPieceIconData(const QVector<HbSharedIconInfo> &multiPieceIconInfo,

        HbMultiIconParams &multiPieceIconParams)

{

    bool mirrored = false;

    int consolidatedIconWidth = 0;

    TSgImageInfo info;

    info.iSizeInPixels = TSize(qRound(multiPieceIconParams.size.width()),

                               qRound(multiPieceIconParams.size.height()));

    info.iPixelFormat = ESgPixelFormatARGB_8888_PRE;

    info.iUsage = ESgUsageBitOpenVgImage | ESgUsageBitOpenVgSurface;

    QScopedPointer<RSgImage, HbSgImageClosure> tempSgImage(new  RSgImage);

    RSgImage *sgImage = tempSgImage.data();

    Q_CHECK_PTR(sgImage);

    TInt err = sgImage->Create(info, 0, 0);

    if (err != KErrNone) {

        return false;

    }

    data.type = SGIMAGE;

    data.sgImageData.width = qRound(multiPieceIconParams.size.width());

    data.sgImageData.height = qRound(multiPieceIconParams.size.height());

    data.sgImageData.defaultWidth = defaultSize.width();

    data.sgImageData.defaultHeight = defaultSize.height();

    //data.sgImageData.sgImage = sgImage;

    TSgDrawableId sgImageId = sgImage->Id();

    memcpy(&data.sgImageData.id, &sgImageId.iId, sizeof(data.sgImageData.id));

    bool success = sgImageRenderer->beginRendering(sgImage);

    if (!success) {

        return false;

    }

    //Clear

    VGfloat color[4] = { 1.0f, 1.0f, 1.0f, 0.0f };

    vgSetfv(VG_CLEAR_COLOR, 4, color);

    vgClear(0, 0, data.sgImageData.width, data.sgImageData.height);

    if (multiPieceIconParams.mirrored) {

        mirrored = true;

        consolidatedIconWidth = multiPieceIconParams.size.toSize().width();

    }

    int iconCount = multiPieceIconParams.multiPartIconList.count();

    for (int i = 0; i < iconCount; i++) {

        HbIconFormatType type = multiPieceIconInfo[i].type;

        bool success = false;

        if (type == NVG) {

#ifdef HB_NVG_CS_ICON

            QPoint position = multiPieceIconParams.multiPartIconData.targets[i].topLeft();

            if (mirrored) {

                int  pieceTopRight = position.x() + multiPieceIconParams.multiPartIconData.targets[i].width();

                position.setX(consolidatedIconWidth - pieceTopRight);

            }

            HbIconSource *source = HbThemeServerUtils::getIconSource(multiPieceIconParams.multiPartIconList[i]);

            success = renderNvg(byteArray, QRect(position,

                                                 multiPieceIconParams.multiPartIconData.pixmapSizes[i]), (Qt::AspectRatioMode)multiPieceIconParams.aspectRatioMode,

                                mirrored);

#endif

        }

        if (!success) {

            sgImageRenderer->endRendering();

            return false;

        }

    }

    vgFinish();

    sgImageRenderer->endRendering();

    tempSgImage.take();

    HbSgImageRenderer::addSgImageToHash(data.sgImageData.id, sgImage);

    return true;

}

bool HbSgimageIconProcessor::renderNvg(const QByteArray& byteArray, const QRect& rect, Qt::AspectRatioMode aspectRatioMode, bool mirrored)

{

    QPoint topLeft = rect.topLeft();

    QSize size(rect.size());

    vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);

    vgLoadIdentity();

    if (!topLeft.isNull()) {

        vgTranslate(topLeft.x(), topLeft.y());

    }

    NvgAspectRatioSettings settings = mapKeyAspectRatioToNvgAspectRatio(aspectRatioMode);

    nvgEngine.setPreserveAspectRatio(settings.nvgAlignStatusAndAspectRatio, settings.type);

    return errorType == HbNvgEngine::NvgErrNone;