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/* -*- 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 <tools/stream.hxx>
#include <rtl/crc.h>
#include <sal/log.hxx>

#include <vcl/animate.hxx>
#include <vcl/virdev.hxx>
#include <vcl/window.hxx>
#include <vcl/dibtools.hxx>
#include <vcl/BitmapColorQuantizationFilter.hxx>

#include <impanmvw.hxx>

#define MIN_TIMEOUT 2

sal_uLong Animation::mnAnimCount = 0;

BitmapChecksum AnimationBitmap::GetChecksum() const
{
    BitmapChecksum  nCrc = aBmpEx.GetChecksum();
    SVBT32      aBT32;

    UInt32ToSVBT32( aPosPix.X(), aBT32 );
    nCrc = vcl_get_checksum( nCrc, aBT32, 4 );

    UInt32ToSVBT32( aPosPix.Y(), aBT32 );
    nCrc = vcl_get_checksum( nCrc, aBT32, 4 );

    UInt32ToSVBT32( aSizePix.Width(), aBT32 );
    nCrc = vcl_get_checksum( nCrc, aBT32, 4 );

    UInt32ToSVBT32( aSizePix.Height(), aBT32 );
    nCrc = vcl_get_checksum( nCrc, aBT32, 4 );

    UInt32ToSVBT32( nWait, aBT32 );
    nCrc = vcl_get_checksum( nCrc, aBT32, 4 );

    UInt32ToSVBT32( static_cast<long>(eDisposal), aBT32 );
    nCrc = vcl_get_checksum( nCrc, aBT32, 4 );

    UInt32ToSVBT32( static_cast<long>(bUserInput), aBT32 );
    nCrc = vcl_get_checksum( nCrc, aBT32, 4 );

    return nCrc;
}

Animation::Animation() :
    mnLoopCount         ( 0 ),
    mnLoops             ( 0 ),
    mnPos               ( 0 ),
    mbIsInAnimation     ( false ),
    mbLoopTerminated    ( false )
{
    maTimer.SetInvokeHandler( LINK( this, Animation, ImplTimeoutHdl ) );
}

Animation::Animation( const Animation& rAnimation ) :
    maBitmapEx          ( rAnimation.maBitmapEx ),
    maGlobalSize        ( rAnimation.maGlobalSize ),
    mnLoopCount         ( rAnimation.mnLoopCount ),
    mnPos               ( rAnimation.mnPos ),
    mbIsInAnimation     ( false ),
    mbLoopTerminated    ( rAnimation.mbLoopTerminated )
{

    for(auto const & i : rAnimation.maList)
        maList.emplace_back( new AnimationBitmap( *i ) );

    maTimer.SetInvokeHandler( LINK( this, Animation, ImplTimeoutHdl ) );
    mnLoops = mbLoopTerminated ? 0 : mnLoopCount;
}

Animation::~Animation()
{
    if( mbIsInAnimation )
        Stop();
}

Animation& Animation::operator=( const Animation& rAnimation )
{
    Clear();

    for(auto const & i : rAnimation.maList)
        maList.emplace_back( new AnimationBitmap( *i ) );

    maGlobalSize = rAnimation.maGlobalSize;
    maBitmapEx = rAnimation.maBitmapEx;
    mnLoopCount = rAnimation.mnLoopCount;
    mnPos = rAnimation.mnPos;
    mbLoopTerminated = rAnimation.mbLoopTerminated;
    mnLoops = mbLoopTerminated ? 0 : mnLoopCount;

    return *this;
}

bool Animation::operator==( const Animation& rAnimation ) const
{
    const size_t nCount = maList.size();
    bool bRet = false;

    if(  rAnimation.maList.size() == nCount
      && rAnimation.maBitmapEx    == maBitmapEx
      && rAnimation.maGlobalSize  == maGlobalSize
      )
    {
        bRet = true;

        for( size_t n = 0; n < nCount; n++ )
        {
            if( ( *maList[ n ] ) != ( *rAnimation.maList[ n ] ) )
            {
                bRet = false;
                break;
            }
        }
    }

    return bRet;
}

void Animation::Clear()
{
    maTimer.Stop();
    mbIsInAnimation = false;
    maGlobalSize = Size();
    maBitmapEx.SetEmpty();
    maList.clear();
    maViewList.clear();
}

bool Animation::IsTransparent() const
{
    tools::Rectangle   aRect( Point(), maGlobalSize );
    bool        bRet = false;

    // If some small bitmap needs to be replaced by the background,
    // we need to be transparent, in order to be displayed correctly
    // as the application (?) does not invalidate on non-transparent
    // graphics due to performance reasons.
    for(auto const & pAnimBmp : maList)
    {
        if(  Disposal::Back == pAnimBmp->eDisposal
          && tools::Rectangle( pAnimBmp->aPosPix, pAnimBmp->aSizePix ) != aRect
          )
        {<--- Consider using std::any_of algorithm instead of a raw loop.
            bRet = true;
            break;
        }
    }

    if( !bRet )
        bRet = maBitmapEx.IsTransparent();

    return bRet;
}

sal_uLong Animation::GetSizeBytes() const
{
    sal_uLong nSizeBytes = GetBitmapEx().GetSizeBytes();

    for(auto const & pAnimBmp : maList)
    {
        nSizeBytes += pAnimBmp->aBmpEx.GetSizeBytes();<--- Consider using std::accumulate algorithm instead of a raw loop.
    }

    return nSizeBytes;
}

BitmapChecksum Animation::GetChecksum() const
{
    SVBT32      aBT32;
    BitmapChecksumOctetArray aBCOA;
    BitmapChecksum  nCrc = GetBitmapEx().GetChecksum();

    UInt32ToSVBT32( maList.size(), aBT32 );
    nCrc = vcl_get_checksum( nCrc, aBT32, 4 );

    UInt32ToSVBT32( maGlobalSize.Width(), aBT32 );
    nCrc = vcl_get_checksum( nCrc, aBT32, 4 );

    UInt32ToSVBT32( maGlobalSize.Height(), aBT32 );
    nCrc = vcl_get_checksum( nCrc, aBT32, 4 );

    for(auto const & i : maList)
    {
        BCToBCOA( i->GetChecksum(), aBCOA );
        nCrc = vcl_get_checksum( nCrc, aBCOA, BITMAP_CHECKSUM_SIZE );
    }

    return nCrc;
}

bool Animation::Start( OutputDevice* pOut, const Point& rDestPt, const Size& rDestSz, long nExtraData,
                       OutputDevice* pFirstFrameOutDev )
{
    bool bRet = false;

    if( !maList.empty() )
    {
        if(  ( pOut->GetOutDevType() == OUTDEV_WINDOW )
          && !mbLoopTerminated
          && ( ANIMATION_TIMEOUT_ON_CLICK != maList[ mnPos ]->nWait )
          )
        {
            ImplAnimView*   pView;
            ImplAnimView*   pMatch = nullptr;

            for( size_t i = 0; i < maViewList.size(); ++i )
            {
                pView = maViewList[ i ].get();
                if( pView->matches( pOut, nExtraData ) )
                {
                    if( pView->getOutPos() == rDestPt &&
                        pView->getOutSizePix() == pOut->LogicToPixel( rDestSz ) )
                    {
                        pView->repaint();
                        pMatch = pView;
                    }
                    else
                    {
                        maViewList.erase( maViewList.begin() + i );
                        pView = nullptr;
                    }

                    break;
                }
            }

            if( maViewList.empty() )
            {
                maTimer.Stop();
                mbIsInAnimation = false;
                mnPos = 0;
            }

            if( !pMatch )
                maViewList.emplace_back( new ImplAnimView( this, pOut, rDestPt, rDestSz, nExtraData, pFirstFrameOutDev ) );

            if( !mbIsInAnimation )
            {
                ImplRestartTimer( maList[ mnPos ]->nWait );
                mbIsInAnimation = true;
            }
        }
        else
            Draw( pOut, rDestPt, rDestSz );

        bRet = true;
    }

    return bRet;
}

void Animation::Stop( OutputDevice* pOut, long nExtraData )
{
    for( size_t i = 0; i < maViewList.size(); )
    {
        ImplAnimView* pView = maViewList[ i ].get();
        if( pView->matches( pOut, nExtraData ) )
        {
            maViewList.erase( maViewList.begin() + i );
        }
        else
            i++;
    }

    if( maViewList.empty() )
    {
        maTimer.Stop();
        mbIsInAnimation = false;
    }
}

void Animation::Draw( OutputDevice* pOut, const Point& rDestPt ) const
{
    Draw( pOut, rDestPt, pOut->PixelToLogic( maGlobalSize ) );
}

void Animation::Draw( OutputDevice* pOut, const Point& rDestPt, const Size& rDestSz ) const
{
    const size_t nCount = maList.size();

    if( nCount )
    {
        AnimationBitmap* pObj = maList[ std::min( mnPos, nCount - 1 ) ].get();

        if(  pOut->GetConnectMetaFile()
          || ( pOut->GetOutDevType() == OUTDEV_PRINTER )
          )
            maList[ 0 ]->aBmpEx.Draw( pOut, rDestPt, rDestSz );
        else if( ANIMATION_TIMEOUT_ON_CLICK == pObj->nWait )
            pObj->aBmpEx.Draw( pOut, rDestPt, rDestSz );
        else
        {
            const size_t nOldPos = mnPos;
            const_cast<Animation*>(this)->mnPos = mbLoopTerminated ? ( nCount - 1 ) : mnPos;
            delete new ImplAnimView( const_cast<Animation*>(this), pOut, rDestPt, rDestSz, 0 );
            const_cast<Animation*>(this)->mnPos = nOldPos;
        }
    }
}

void Animation::ImplRestartTimer( sal_uLong nTimeout )
{
    maTimer.SetTimeout( std::max( nTimeout, static_cast<sal_uLong>(MIN_TIMEOUT) ) * 10 );
    maTimer.Start();
}

IMPL_LINK_NOARG(Animation, ImplTimeoutHdl, Timer *, void)
{
    const size_t nAnimCount = maList.size();

    if( nAnimCount )
    {
        ImplAnimView*   pView;
        bool        bGlobalPause = true;

        if( maNotifyLink.IsSet() )
        {
            std::vector< std::unique_ptr<AInfo> > aAInfoList;
            // create AInfo-List
            for(auto const & i : maViewList)
                aAInfoList.emplace_back( i->createAInfo() );<--- Consider using std::transform algorithm instead of a raw loop.

            maNotifyLink.Call( this );

            // set view state from AInfo structure
            for(auto& pAInfo : aAInfoList)
            {
                if( !pAInfo->pViewData )
                {
                    pView = new ImplAnimView( this, pAInfo->pOutDev,
                                              pAInfo->aStartOrg, pAInfo->aStartSize, pAInfo->nExtraData );

                    maViewList.push_back( std::unique_ptr<ImplAnimView>(pView) );
                }
                else
                    pView = static_cast<ImplAnimView*>(pAInfo->pViewData);

                pView->pause( pAInfo->bPause );
                pView->setMarked( true );
            }

            // delete all unmarked views and reset marked state
            for( size_t i = 0; i < maViewList.size(); )
            {
                pView = maViewList[ i ].get();
                if( !pView->isMarked() )
                {
                    maViewList.erase( maViewList.begin() + i );
                }
                else
                {
                    if( !pView->isPause() )
                        bGlobalPause = false;

                    pView->setMarked( false );
                    i++;
                }
            }
        }
        else
            bGlobalPause = false;

        if( maViewList.empty() )
            Stop();
        else if( bGlobalPause )
            ImplRestartTimer( 10 );
        else
        {
            AnimationBitmap* pStepBmp = (++mnPos < maList.size()) ? maList[ mnPos ].get() : nullptr;

            if( !pStepBmp )
            {
                if( mnLoops == 1 )
                {
                    Stop();
                    mbLoopTerminated = true;
                    mnPos = nAnimCount - 1;
                    maBitmapEx = maList[ mnPos ]->aBmpEx;
                    return;
                }
                else
                {
                    if( mnLoops )
                        mnLoops--;

                    mnPos = 0;
                    pStepBmp = maList[ mnPos ].get();
                }
            }

            // Paint all views; after painting check, if view is
            // marked; in this case remove view, because area of output
            // lies out of display area of window; mark state is
            // set from view itself
            for( size_t i = 0; i < maViewList.size(); )
            {
                pView = maViewList[ i ].get();
                pView->draw( mnPos );

                if( pView->isMarked() )
                {
                    maViewList.erase( maViewList.begin() + i );
                }
                else
                    i++;
            }

            // stop or restart timer
            if( maViewList.empty() )
                Stop();
            else
                ImplRestartTimer( pStepBmp->nWait );
        }
    }
    else
        Stop();
}

bool Animation::Insert( const AnimationBitmap& rStepBmp )
{
    bool bRet = false;

    if( !IsInAnimation() )
    {
        tools::Rectangle   aGlobalRect( Point(), maGlobalSize );

        maGlobalSize = aGlobalRect.Union( tools::Rectangle( rStepBmp.aPosPix, rStepBmp.aSizePix ) ).GetSize();
        maList.emplace_back( new AnimationBitmap( rStepBmp ) );

        // As a start, we make the first BitmapEx the replacement BitmapEx
        if( maList.size() == 1 )
            maBitmapEx = rStepBmp.aBmpEx;

        bRet = true;
    }

    return bRet;
}

const AnimationBitmap& Animation::Get( sal_uInt16 nAnimation ) const
{
    SAL_WARN_IF( ( nAnimation >= maList.size() ), "vcl", "No object at this position" );
    return *maList[ nAnimation ];
}

void Animation::Replace( const AnimationBitmap& rNewAnimationBitmap, sal_uInt16 nAnimation )
{
    SAL_WARN_IF( ( nAnimation >= maList.size() ), "vcl", "No object at this position" );

    maList[ nAnimation ].reset( new AnimationBitmap( rNewAnimationBitmap ) );

    // If we insert at first position we also need to
    // update the replacement BitmapEx
    if ( (  !nAnimation
         && (  !mbLoopTerminated
            || ( maList.size() == 1 )
            )
         )
         ||
         (  ( nAnimation == maList.size() - 1 )
         && mbLoopTerminated
         )
       )
    {
        maBitmapEx = rNewAnimationBitmap.aBmpEx;
    }
}

void Animation::SetLoopCount(const sal_uInt32 nLoopCount)
{
    mnLoopCount = nLoopCount;
    ResetLoopCount();
}

void Animation::ResetLoopCount()
{
    mnLoops = mnLoopCount;
    mbLoopTerminated = false;
}

void Animation::Convert( BmpConversion eConversion )
{
    SAL_WARN_IF( IsInAnimation(), "vcl", "Animation modified while it is animated" );

    bool bRet;

    if( !IsInAnimation() && !maList.empty() )
    {
        bRet = true;

        for( size_t i = 0, n = maList.size(); ( i < n ) && bRet; ++i )
            bRet = maList[ i ]->aBmpEx.Convert( eConversion );

        maBitmapEx.Convert( eConversion );
    }
}

bool Animation::ReduceColors( sal_uInt16 nNewColorCount )
{
    SAL_WARN_IF( IsInAnimation(), "vcl", "Animation modified while it is animated" );

    bool bRet;

    if( !IsInAnimation() && !maList.empty() )
    {
        bRet = true;

        for (size_t i = 0, n = maList.size(); (i < n) && bRet; ++i)
        {
            bRet = BitmapFilter::Filter(maList[i]->aBmpEx, BitmapColorQuantizationFilter(nNewColorCount));
        }

        BitmapFilter::Filter(maBitmapEx, BitmapColorQuantizationFilter(nNewColorCount));
    }
    else
    {
        bRet = false;
    }

    return bRet;
}

bool Animation::Invert()
{
    SAL_WARN_IF( IsInAnimation(), "vcl", "Animation modified while it is animated" );

    bool bRet;

    if( !IsInAnimation() && !maList.empty() )
    {
        bRet = true;

        for( size_t i = 0, n = maList.size(); ( i < n ) && bRet; ++i )
            bRet = maList[ i ]->aBmpEx.Invert();

        maBitmapEx.Invert();
    }
    else
        bRet = false;

    return bRet;
}

void Animation::Mirror( BmpMirrorFlags nMirrorFlags )
{
    SAL_WARN_IF( IsInAnimation(), "vcl", "Animation modified while it is animated" );

    bool    bRet;

    if( !IsInAnimation() && !maList.empty() )
    {
        bRet = true;

        if( nMirrorFlags != BmpMirrorFlags::NONE )
        {
            for( size_t i = 0, n = maList.size(); ( i < n ) && bRet; ++i )
            {
                AnimationBitmap* pStepBmp = maList[ i ].get();
                bRet = pStepBmp->aBmpEx.Mirror( nMirrorFlags );
                if( bRet )
                {
                    if( nMirrorFlags & BmpMirrorFlags::Horizontal )
                        pStepBmp->aPosPix.setX( maGlobalSize.Width() - pStepBmp->aPosPix.X() - pStepBmp->aSizePix.Width() );

                    if( nMirrorFlags & BmpMirrorFlags::Vertical )
                        pStepBmp->aPosPix.setY( maGlobalSize.Height() - pStepBmp->aPosPix.Y() - pStepBmp->aSizePix.Height() );
                }
            }

            maBitmapEx.Mirror( nMirrorFlags );
        }
    }
}

void Animation::Adjust( short nLuminancePercent, short nContrastPercent,
             short nChannelRPercent, short nChannelGPercent, short nChannelBPercent,
             double fGamma, bool bInvert )
{
    SAL_WARN_IF( IsInAnimation(), "vcl", "Animation modified while it is animated" );

    bool bRet;

    if( !IsInAnimation() && !maList.empty() )
    {
        bRet = true;

        for( size_t i = 0, n = maList.size(); ( i < n ) && bRet; ++i )
        {
            bRet = maList[ i ]->aBmpEx.Adjust( nLuminancePercent,
                                               nContrastPercent,
                                               nChannelRPercent,
                                               nChannelGPercent,
                                               nChannelBPercent,
                                               fGamma, bInvert
                                             );
        }

        maBitmapEx.Adjust( nLuminancePercent, nContrastPercent,
                           nChannelRPercent, nChannelGPercent, nChannelBPercent,
                           fGamma, bInvert );
    }
}

SvStream& WriteAnimation( SvStream& rOStm, const Animation& rAnimation )
{
    const sal_uInt16 nCount = rAnimation.Count();

    if( nCount )
    {
        const sal_uInt32    nDummy32 = 0;

        // If no BitmapEx was set we write the first Bitmap of
        // the Animation
        if( !rAnimation.GetBitmapEx().GetBitmap() )
            WriteDIBBitmapEx(rAnimation.Get( 0 ).aBmpEx, rOStm);
        else
            WriteDIBBitmapEx(rAnimation.GetBitmapEx(), rOStm);

        // Write identifier ( SDANIMA1 )
        rOStm.WriteUInt32( 0x5344414e ).WriteUInt32( 0x494d4931 );

        for( sal_uInt16 i = 0; i < nCount; i++ )
        {
            const AnimationBitmap&  rAnimBmp = rAnimation.Get( i );
            const sal_uInt16            nRest = nCount - i - 1;

            // Write AnimationBitmap
            WriteDIBBitmapEx(rAnimBmp.aBmpEx, rOStm);
            WritePair( rOStm, rAnimBmp.aPosPix );
            WritePair( rOStm, rAnimBmp.aSizePix );
            WritePair( rOStm, rAnimation.maGlobalSize );
            rOStm.WriteUInt16( ( ANIMATION_TIMEOUT_ON_CLICK == rAnimBmp.nWait ) ? 65535 : rAnimBmp.nWait );
            rOStm.WriteUInt16( static_cast<sal_uInt16>(rAnimBmp.eDisposal) );
            rOStm.WriteBool( rAnimBmp.bUserInput );
            rOStm.WriteUInt32( rAnimation.mnLoopCount );
            rOStm.WriteUInt32( nDummy32 ); // Unused
            rOStm.WriteUInt32( nDummy32 ); // Unused
            rOStm.WriteUInt32( nDummy32 ); // Unused
            write_uInt16_lenPrefixed_uInt8s_FromOString(rOStm, OString()); // dummy
            rOStm.WriteUInt16( nRest ); // Count of remaining structures
        }
    }

    return rOStm;
}

SvStream& ReadAnimation( SvStream& rIStm, Animation& rAnimation )
{
    sal_uLong   nStmPos;
    sal_uInt32  nAnimMagic1, nAnimMagic2;
    SvStreamEndian nOldFormat = rIStm.GetEndian();
    bool        bReadAnimations = false;

    rIStm.SetEndian( SvStreamEndian::LITTLE );
    nStmPos = rIStm.Tell();
    rIStm.ReadUInt32( nAnimMagic1 ).ReadUInt32( nAnimMagic2 );

    rAnimation.Clear();

    // If the BitmapEx at the beginning have already been read (by Graphic)
    // we can start reading the AnimationBitmaps right away
    if( ( nAnimMagic1 == 0x5344414e ) && ( nAnimMagic2 == 0x494d4931 ) && !rIStm.GetError() )
        bReadAnimations = true;
    // Else, we try reading the Bitmap(-Ex)
    else
    {
        rIStm.Seek( nStmPos );
        ReadDIBBitmapEx(rAnimation.maBitmapEx, rIStm);
        nStmPos = rIStm.Tell();
        rIStm.ReadUInt32( nAnimMagic1 ).ReadUInt32( nAnimMagic2 );

        if( ( nAnimMagic1 == 0x5344414e ) && ( nAnimMagic2 == 0x494d4931 ) && !rIStm.GetError() )
            bReadAnimations = true;
        else
            rIStm.Seek( nStmPos );
    }

    // Read AnimationBitmaps
    if( bReadAnimations )
    {
        AnimationBitmap aAnimBmp;
        sal_uInt32          nTmp32;
        sal_uInt16          nTmp16;
        bool           cTmp;

        do
        {
            ReadDIBBitmapEx(aAnimBmp.aBmpEx, rIStm);
            ReadPair( rIStm, aAnimBmp.aPosPix );
            ReadPair( rIStm, aAnimBmp.aSizePix );
            ReadPair( rIStm, rAnimation.maGlobalSize );
            rIStm.ReadUInt16( nTmp16 ); aAnimBmp.nWait = ( ( 65535 == nTmp16 ) ? ANIMATION_TIMEOUT_ON_CLICK : nTmp16 );
            rIStm.ReadUInt16( nTmp16 ); aAnimBmp.eDisposal = static_cast<Disposal>(nTmp16);
            rIStm.ReadCharAsBool( cTmp ); aAnimBmp.bUserInput = cTmp;
            rIStm.ReadUInt32( rAnimation.mnLoopCount );
            rIStm.ReadUInt32( nTmp32 ); // Unused
            rIStm.ReadUInt32( nTmp32 ); // Unused
            rIStm.ReadUInt32( nTmp32 ); // Unused
            read_uInt16_lenPrefixed_uInt8s_ToOString(rIStm); // Unused
            rIStm.ReadUInt16( nTmp16 ); // The rest to read

            rAnimation.Insert( aAnimBmp );
        }
        while( nTmp16 && !rIStm.GetError() );

        rAnimation.ResetLoopCount();
    }

    rIStm.SetEndian( nOldFormat );

    return rIStm;
}

AInfo::AInfo() : pOutDev( nullptr ),
                              pViewData( nullptr ),
                              nExtraData( 0 ),
                              bPause( false ) {}

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