/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * This file incorporates work covered by the following license notice:

 *

 *   Licensed to the Apache Software Foundation (ASF) under one or more

 *   contributor license agreements. See the NOTICE file distributed

 *   with this work for additional information regarding copyright

 *   ownership. The ASF licenses this file to you under the Apache

 *   License, Version 2.0 (the "License"); you may not use this file

 *   except in compliance with the License. You may obtain a copy of

 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .

 */

#include <graphic/GraphicID.hxx>

#include <impgraph.hxx>

#include <rtl/crc.h>

#include <rtl/strbuf.hxx>

#include <vcl/vectorgraphicdata.hxx>

GraphicID::GraphicID(ImpGraphic const& rGraphic)

{

    rGraphic.ensureAvailable();

    mnID1 = static_cast<sal_uLong>(rGraphic.getType()) << 28;

    mnID2 = mnID3 = mnID4 = 0;

    if (rGraphic.getType() == GraphicType::Bitmap)

    {

        auto const& rVectorGraphicDataPtr = rGraphic.getVectorGraphicData();

        if (rVectorGraphicDataPtr)

        {

            const basegfx::B2DRange& rRange = rVectorGraphicDataPtr->getRange();

            mnID1 |= rVectorGraphicDataPtr->getBinaryDataContainer().getSize();

            mnID2 = basegfx::fround(rRange.getWidth());

            mnID3 = basegfx::fround(rRange.getHeight());

            mnID4 = rtl_crc32(0, rVectorGraphicDataPtr->getBinaryDataContainer().getData(),

                              rVectorGraphicDataPtr->getBinaryDataContainer().getSize());

        }

        else if (rGraphic.isAnimated())

        {

            const Animation aAnimation(rGraphic.getAnimation());

            mnID1 |= (aAnimation.Count() & 0x0fffffff);

            mnID2 = aAnimation.GetDisplaySizePixel().Width();

            mnID3 = aAnimation.GetDisplaySizePixel().Height();

            mnID4 = rGraphic.getChecksum();

        }

        else

        {

            const Bitmap aBmp(rGraphic.getBitmap(GraphicConversionParameters()));

            mnID1 |= aBmp.HasAlpha() ? 1 : 0;

            mnID2 = aBmp.GetSizePixel().Width();

            mnID3 = aBmp.GetSizePixel().Height();

            mnID4 = rGraphic.getChecksum();

        }

    }

    else if (rGraphic.getType() == GraphicType::GdiMetafile)

    {

        const GDIMetaFile& rMtf = rGraphic.getGDIMetaFile();

        mnID1 |= (rMtf.GetActionSize() & 0x0fffffff);

        mnID2 = rMtf.GetPrefSize().Width();

        mnID3 = rMtf.GetPrefSize().Height();

        mnID4 = rGraphic.getChecksum();

    }

}

OString GraphicID::getIDString() const

{

    static const char aHexData[]

        = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

    sal_Int32 nShift, nIndex = 0;

    sal_Int32 nLen = 24 + (2 * BITMAP_CHECKSUM_SIZE);

    OStringBuffer aHexStr(nLen);

    aHexStr.setLength(nLen);

    for (nShift = 28; nShift >= 0; nShift -= 4)

        aHexStr[nIndex++] = aHexData[(mnID1 >> static_cast<sal_uInt32>(nShift)) & 0xf];

    for (nShift = 28; nShift >= 0; nShift -= 4)

        aHexStr[nIndex++] = aHexData[(mnID2 >> static_cast<sal_uInt32>(nShift)) & 0xf];

    for (nShift = 28; nShift >= 0; nShift -= 4)

        aHexStr[nIndex++] = aHexData[(mnID3 >> static_cast<sal_uInt32>(nShift)) & 0xf];

    for (nShift = (8 * BITMAP_CHECKSUM_SIZE) - 4; nShift >= 0; nShift -= 4)

        aHexStr[nIndex++] = aHexData[(mnID4 >> static_cast<sal_uInt32>(nShift)) & 0xf];

    return aHexStr.makeStringAndClear();

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */