/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtWebEngine module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
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** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "type_conversion.h"

#include <ui/events/event_constants.h>
#include <ui/gfx/image/image_skia.h>
#include <QtCore/qcoreapplication.h>

namespace QtWebEngineCore {

QImage toQImage(const SkBitmap &bitmap)
{
    QImage image;
    switch (bitmap.colorType()) {
    case kUnknown_SkColorType:
        break;
    case kAlpha_8_SkColorType:
        image = toQImage(bitmap, QImage::Format_Alpha8);
        break;
    case kRGB_565_SkColorType:
        image = toQImage(bitmap, QImage::Format_RGB16);
        break;
    case kARGB_4444_SkColorType:
        switch (bitmap.alphaType()) {
        case kUnknown_SkAlphaType:
            break;
        case kUnpremul_SkAlphaType:
            // not supported - treat as opaque
        case kOpaque_SkAlphaType:
            image = toQImage(bitmap, QImage::Format_RGB444);
            break;
        case kPremul_SkAlphaType:
            image = toQImage(bitmap, QImage::Format_ARGB4444_Premultiplied);
            break;
        }
        break;
    case kRGBA_8888_SkColorType:
        switch (bitmap.alphaType()) {
        case kUnknown_SkAlphaType:
            break;
        case kOpaque_SkAlphaType:
            image = toQImage(bitmap, QImage::Format_RGBX8888);
            break;
        case kPremul_SkAlphaType:
            image = toQImage(bitmap, QImage::Format_RGBA8888_Premultiplied);
            break;
        case kUnpremul_SkAlphaType:
            image = toQImage(bitmap, QImage::Format_RGBA8888);
            break;
        }
        break;
    case kBGRA_8888_SkColorType:
        // we are assuming little-endian arch here.
        switch (bitmap.alphaType()) {
        case kUnknown_SkAlphaType:
            break;
        case kOpaque_SkAlphaType:
            image = toQImage(bitmap, QImage::Format_RGB32);
            break;
        case kPremul_SkAlphaType:
            image = toQImage(bitmap, QImage::Format_ARGB32_Premultiplied);
            break;
        case kUnpremul_SkAlphaType:
            image = toQImage(bitmap, QImage::Format_ARGB32);
            break;
        }
        break;
    case kIndex_8_SkColorType: {
        image = toQImage(bitmap, QImage::Format_Indexed8);
        SkColorTable *skTable = bitmap.getColorTable();
        if (skTable) {
            QVector<QRgb> qTable(skTable->count());
            for (int i = 0; i < skTable->count(); ++i)
                qTable[i] = (*skTable)[i];
            image.setColorTable(qTable);
        }
        break;
    }
    case kGray_8_SkColorType:
        image = toQImage(bitmap, QImage::Format_Grayscale8);
        break;
    }
    return image;
}

QImage toQImage(const gfx::ImageSkiaRep &imageSkiaRep)
{
    QImage image = toQImage(imageSkiaRep.sk_bitmap());
    if (!image.isNull() && imageSkiaRep.scale() != 1.0f)
        image.setDevicePixelRatio(imageSkiaRep.scale());
    return image;
}

int flagsFromModifiers(Qt::KeyboardModifiers modifiers)
{
    int modifierFlags = ui::EF_NONE;
#if defined(Q_OS_OSX)
    if (!qApp->testAttribute(Qt::AA_MacDontSwapCtrlAndMeta)) {
        if ((modifiers & Qt::ControlModifier) != 0)
            modifierFlags |= ui::EF_COMMAND_DOWN;
        if ((modifiers & Qt::MetaModifier) != 0)
            modifierFlags |= ui::EF_CONTROL_DOWN;
    } else
#endif
    {
        if ((modifiers & Qt::ControlModifier) != 0)
            modifierFlags |= ui::EF_CONTROL_DOWN;
        if ((modifiers & Qt::MetaModifier) != 0)
            modifierFlags |= ui::EF_COMMAND_DOWN;
    }
    if ((modifiers & Qt::ShiftModifier) != 0)
        modifierFlags |= ui::EF_SHIFT_DOWN;
    if ((modifiers & Qt::AltModifier) != 0)
        modifierFlags |= ui::EF_ALT_DOWN;
    return modifierFlags;
}


} // namespace QtWebEngineCore