Move GIF writer from filter module into VCL

Change-Id: I8db3ca0f7953b44791bda47534220902931fab8d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/111023
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

6 files changed, 11 insertions, 896 deletions

diff --git a/filter/Library_gie.mk b/filter/Library_gie.mk
deleted file mode 100644
index b40da250a183..000000000000
--- a/filter/Library_gie.mk
+++ /dev/null
@@ -1,56 +0,0 @@
-# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
-#
-# 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 .
-#
-
-$(eval $(call gb_Library_Library,gie))
-
-$(eval $(call gb_Library_set_include,gie,\
-    $$(INCLUDE) \
-    -I$(SRCDIR)/filter/inc \
-))
-
-$(eval $(call gb_Library_use_external,gie,boost_headers))
-
-$(eval $(call gb_Library_use_sdk_api,gie))
-
-$(eval $(call gb_Library_use_custom_headers,gie,\
-	officecfg/registry \
-))
-
-$(eval $(call gb_Library_use_common_precompiled_header,gie))
-
-$(eval $(call gb_Library_use_libraries,gie,\
-    basegfx \
-    comphelper \
-    i18nlangtag \
-    svt \
-    vcl \
-    utl \
-    tl \
-    tk \
-    cppu \
-    sal \
-    salhelper \
-))
-
-$(eval $(call gb_Library_add_exception_objects,gie,\
-    filter/source/graphicfilter/egif/egif \
-    filter/source/graphicfilter/egif/giflzwc \
-))
-
-# vim: set noet sw=4 ts=4:
diff --git a/filter/Module_filter.mk b/filter/Module_filter.mk
index 2fb2e4c0c8e3..42a82bacf5c0 100644
--- a/filter/Module_filter.mk
+++ b/filter/Module_filter.mk
@@ -21,7 +21,6 @@ $(eval $(call gb_Module_Module,filter))
 $(eval $(call gb_Module_add_targets,filter,\
 	Configuration_filter \
 	CustomTarget_svg \
-    Library_gie \
 	Library_filterconfig \
     Library_icg \
 	Library_msfilter \
diff --git a/filter/source/config/fragments/internalgraphicfilters/gif_Export.xcu b/filter/source/config/fragments/internalgraphicfilters/gif_Export.xcu
index 7f021c1b9a7f..f55d1ba55385 100644
--- a/filter/source/config/fragments/internalgraphicfilters/gif_Export.xcu
+++ b/filter/source/config/fragments/internalgraphicfilters/gif_Export.xcu
@@ -15,13 +15,14 @@
  *   except in compliance with the License. You may obtain a copy of
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 -->
-    <node oor:name="gif_Export" oor:op="replace"  >
-        <prop oor:name="Type"><value>gif_Graphics_Interchange</value></prop>
-        <prop oor:name="FormatName"><value>egi</value></prop>
-        <prop oor:name="RealFilterName"/>
-        <prop oor:name="UIComponent"><value>com.sun.star.svtools.SvFilterOptionsDialog</value></prop>
-        <prop oor:name="UIName">
-            <value xml:lang="en-US">GIF - Graphics Interchange Format</value>
-        </prop>
-        <prop oor:name="Flags"><value>EXPORT</value></prop>
-    </node>
+
+<node oor:name="gif_Export" oor:op="replace"  >
+    <prop oor:name="Type"><value>gif_Graphics_Interchange</value></prop>
+    <prop oor:name="FormatName"><value>SVEGIF</value></prop>
+    <prop oor:name="RealFilterName"/>
+    <prop oor:name="UIComponent"><value>com.sun.star.svtools.SvFilterOptionsDialog</value></prop>
+    <prop oor:name="UIName">
+        <value xml:lang="en-US">GIF - Graphics Interchange Format</value>
+    </prop>
+    <prop oor:name="Flags"><value>EXPORT</value></prop>
+</node>
diff --git a/filter/source/graphicfilter/egif/egif.cxx b/filter/source/graphicfilter/egif/egif.cxx
deleted file mode 100644
index 7a70d337e6c5..000000000000
--- a/filter/source/graphicfilter/egif/egif.cxx
+++ /dev/null
@@ -1,549 +0,0 @@
-/* -*- 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 <tools/debug.hxx>
-#include <vcl/BitmapReadAccess.hxx>
-#include <vcl/graph.hxx>
-#include <vcl/outdev.hxx>
-#include <vcl/FilterConfigItem.hxx>
-#include <com/sun/star/task/XStatusIndicator.hpp>
-#include "giflzwc.hxx"
-#include <memory>
-
-namespace {
-
-class GIFWriter
-{
-    Bitmap              aAccBmp;
-    SvStream& m_rGIF;
-    BitmapReadAccess*   m_pAcc;
-    sal_uInt32          nMinPercent;
-    sal_uInt32          nMaxPercent;
-    sal_uInt32          nLastPercent;
-    tools::Long                nActX;
-    tools::Long                nActY;
-    sal_Int32           nInterlaced;
-    bool                bStatus;
-    bool                bTransparent;
-
-    void                MayCallback(sal_uInt32 nPercent);
-    void                WriteSignature( bool bGIF89a );
-    void                WriteGlobalHeader( const Size& rSize );
-    void                WriteLoopExtension( const Animation& rAnimation );
-    void                WriteLogSizeExtension( const Size& rSize100 );
-    void                WriteImageExtension( tools::Long nTimer, Disposal eDisposal );
-    void                WriteLocalHeader();
-    void                WritePalette();
-    void                WriteAccess();
-    void                WriteTerminator();
-
-    bool                CreateAccess( const BitmapEx& rBmpEx );
-    void                DestroyAccess();
-
-    void                WriteAnimation( const Animation& rAnimation );
-    void                WriteBitmapEx( const BitmapEx& rBmpEx, const Point& rPoint, bool bExtended,
-                                       tools::Long nTimer = 0, Disposal eDisposal = Disposal::Not );
-
-    css::uno::Reference< css::task::XStatusIndicator > xStatusIndicator;
-
-public:
-
-    explicit GIFWriter(SvStream &rStream);
-
-    bool WriteGIF( const Graphic& rGraphic, FilterConfigItem* pConfigItem );
-};
-
-}
-
-GIFWriter::GIFWriter(SvStream &rStream)
-    : m_rGIF(rStream)
-    , m_pAcc(nullptr)
-    , nMinPercent(0)
-    , nMaxPercent(0)
-    , nLastPercent(0)
-    , nActX(0)
-    , nActY(0)
-    , nInterlaced(0)
-    , bStatus(false)
-    , bTransparent(false)
-{
-}
-
-
-bool GIFWriter::WriteGIF(const Graphic& rGraphic, FilterConfigItem* pFilterConfigItem)
-{
-    if ( pFilterConfigItem )
-    {
-        xStatusIndicator = pFilterConfigItem->GetStatusIndicator();
-        if ( xStatusIndicator.is() )
-        {
-            xStatusIndicator->start( OUString(), 100 );
-        }
-    }
-
-    Size            aSize100;
-    const MapMode   aMap( rGraphic.GetPrefMapMode() );
-    bool            bLogSize = ( aMap.GetMapUnit() != MapUnit::MapPixel );
-
-    if( bLogSize )
-        aSize100 = OutputDevice::LogicToLogic(rGraphic.GetPrefSize(), aMap, MapMode(MapUnit::Map100thMM));
-
-    bStatus = true;
-    nLastPercent = 0;
-    nInterlaced = 0;
-    m_pAcc = nullptr;
-
-    if ( pFilterConfigItem )
-        nInterlaced = pFilterConfigItem->ReadInt32( "Interlaced", 0 );
-
-    m_rGIF.SetEndian( SvStreamEndian::LITTLE );
-
-    if( rGraphic.IsAnimated() )
-    {
-        const Animation& rAnimation = rGraphic.GetAnimation();
-
-        WriteSignature( true );
-
-        if ( bStatus )
-        {
-            WriteGlobalHeader( rAnimation.GetDisplaySizePixel() );
-
-            if( bStatus )
-            {
-                WriteLoopExtension( rAnimation );
-
-                if( bStatus )
-                    WriteAnimation( rAnimation );
-            }
-        }
-    }
-    else
-    {
-        const bool bGrafTrans = rGraphic.IsTransparent();
-
-        BitmapEx aBmpEx = rGraphic.GetBitmapEx();
-
-        nMinPercent = 0;
-        nMaxPercent = 100;
-
-        WriteSignature( bGrafTrans || bLogSize );
-
-        if( bStatus )
-        {
-            WriteGlobalHeader( aBmpEx.GetSizePixel() );
-
-            if( bStatus )
-                WriteBitmapEx( aBmpEx, Point(), bGrafTrans );
-        }
-    }
-
-    if( bStatus )
-    {
-        if( bLogSize )
-            WriteLogSizeExtension( aSize100 );
-
-        WriteTerminator();
-    }
-
-    if ( xStatusIndicator.is() )
-        xStatusIndicator->end();
-
-    return bStatus;
-}
-
-
-void GIFWriter::WriteBitmapEx( const BitmapEx& rBmpEx, const Point& rPoint,
-                               bool bExtended, tools::Long nTimer, Disposal eDisposal )
-{
-    if( !CreateAccess( rBmpEx ) )
-        return;
-
-    nActX = rPoint.X();
-    nActY = rPoint.Y();
-
-    if( bExtended )
-        WriteImageExtension( nTimer, eDisposal );
-
-    if( bStatus )
-    {
-        WriteLocalHeader();
-
-        if( bStatus )
-        {
-            WritePalette();
-
-            if( bStatus )
-                WriteAccess();
-        }
-    }
-
-    DestroyAccess();
-}
-
-
-void GIFWriter::WriteAnimation( const Animation& rAnimation )
-{
-    const sal_uInt16    nCount = rAnimation.Count();
-
-    if( !nCount )
-        return;
-
-    const double fStep = 100. / nCount;
-
-    nMinPercent = 0;
-    nMaxPercent = static_cast<sal_uInt32>(fStep);
-
-    for( sal_uInt16 i = 0; i < nCount; i++ )
-    {
-        const AnimationBitmap& rAnimationBitmap = rAnimation.Get( i );
-
-        WriteBitmapEx(rAnimationBitmap.maBitmapEx, rAnimationBitmap.maPositionPixel, true,
-                       rAnimationBitmap.mnWait, rAnimationBitmap.meDisposal );
-        nMinPercent = nMaxPercent;
-        nMaxPercent = static_cast<sal_uInt32>(nMaxPercent + fStep);
-    }
-}
-
-
-void GIFWriter::MayCallback(sal_uInt32 nPercent)
-{
-    if ( xStatusIndicator.is() )
-    {
-        if( nPercent >= nLastPercent + 3 )
-        {
-            nLastPercent = nPercent;
-            if ( nPercent <= 100 )
-                xStatusIndicator->setValue( nPercent );
-        }
-    }
-}
-
-
-bool GIFWriter::CreateAccess( const BitmapEx& rBmpEx )
-{
-    if( bStatus )
-    {
-        Bitmap aMask( rBmpEx.GetMask() );
-
-        aAccBmp = rBmpEx.GetBitmap();
-        bTransparent = false;
-
-        if( !!aMask )
-        {
-            if( aAccBmp.Convert( BmpConversion::N8BitTrans ) )
-            {
-                aMask.Convert( BmpConversion::N1BitThreshold );
-                aAccBmp.Replace( aMask, BMP_COL_TRANS );
-                bTransparent = true;
-            }
-            else
-                aAccBmp.Convert( BmpConversion::N8BitColors );
-        }
-        else
-            aAccBmp.Convert( BmpConversion::N8BitColors );
-
-        m_pAcc = aAccBmp.AcquireReadAccess();
-
-        if( !m_pAcc )
-            bStatus = false;
-    }
-
-    return bStatus;
-}
-
-
-void GIFWriter::DestroyAccess()
-{
-    Bitmap::ReleaseAccess( m_pAcc );
-    m_pAcc = nullptr;
-}
-
-
-void GIFWriter::WriteSignature( bool bGIF89a )
-{
-    if( bStatus )
-    {
-        m_rGIF.WriteBytes(bGIF89a ? "GIF89a" : "GIF87a" , 6);
-
-        if( m_rGIF.GetError() )
-            bStatus = false;
-    }
-}
-
-
-void GIFWriter::WriteGlobalHeader( const Size& rSize )
-{
-    if( !bStatus )
-        return;
-
-    // 256 colors
-    const sal_uInt16    nWidth = static_cast<sal_uInt16>(rSize.Width());
-    const sal_uInt16    nHeight = static_cast<sal_uInt16>(rSize.Height());
-    const sal_uInt8     cFlags = 128 | ( 7 << 4 );
-
-    // write values
-    m_rGIF.WriteUInt16( nWidth );
-    m_rGIF.WriteUInt16( nHeight );
-    m_rGIF.WriteUChar( cFlags );
-    m_rGIF.WriteUChar( 0x00 );
-    m_rGIF.WriteUChar( 0x00 );
-
-    // write dummy palette with two entries (black/white);
-    // we do this only because of a bug in Photoshop, since those can't
-    // read pictures without a global color palette
-    m_rGIF.WriteUInt16( 0 );
-    m_rGIF.WriteUInt16( 255 );
-    m_rGIF.WriteUInt16( 65535 );
-
-    if( m_rGIF.GetError() )
-        bStatus = false;
-}
-
-
-void GIFWriter::WriteLoopExtension( const Animation& rAnimation )
-{
-    DBG_ASSERT( rAnimation.Count() > 0, "Animation has no bitmaps!" );
-
-    sal_uInt16 nLoopCount = static_cast<sal_uInt16>(rAnimation.GetLoopCount());
-
-    // if only one run should take place
-    // the LoopExtension won't be written
-    // The default in this case is a single run
-    if( nLoopCount == 1 )
-        return;
-
-    // Netscape interprets the LoopCount
-    // as the sole number of _repetitions_
-    if( nLoopCount )
-        nLoopCount--;
-
-    const sal_uInt8 cLoByte = static_cast<sal_uInt8>(nLoopCount);
-    const sal_uInt8 cHiByte = static_cast<sal_uInt8>( nLoopCount >> 8 );
-
-    m_rGIF.WriteUChar( 0x21 );
-    m_rGIF.WriteUChar( 0xff );
-    m_rGIF.WriteUChar( 0x0b );
-    m_rGIF.WriteBytes( "NETSCAPE2.0", 11 );
-    m_rGIF.WriteUChar( 0x03 );
-    m_rGIF.WriteUChar( 0x01 );
-    m_rGIF.WriteUChar( cLoByte );
-    m_rGIF.WriteUChar( cHiByte );
-    m_rGIF.WriteUChar( 0x00 );
-}
-
-
-void GIFWriter::WriteLogSizeExtension( const Size& rSize100 )
-{
-    // writer PrefSize in 100th-mm as ApplicationExtension
-    if( rSize100.Width() && rSize100.Height() )
-    {
-        m_rGIF.WriteUChar( 0x21 );
-        m_rGIF.WriteUChar( 0xff );
-        m_rGIF.WriteUChar( 0x0b );
-        m_rGIF.WriteBytes( "STARDIV 5.0", 11 );
-        m_rGIF.WriteUChar( 0x09 );
-        m_rGIF.WriteUChar( 0x01 );
-        m_rGIF.WriteUInt32( rSize100.Width() );
-        m_rGIF.WriteUInt32( rSize100.Height() );
-        m_rGIF.WriteUChar( 0x00 );
-    }
-}
-
-
-void GIFWriter::WriteImageExtension( tools::Long nTimer, Disposal eDisposal )
-{
-    if( !bStatus )
-        return;
-
-    const sal_uInt16    nDelay = static_cast<sal_uInt16>(nTimer);
-    sal_uInt8           cFlags = 0;
-
-    // set Transparency-Flag
-    if( bTransparent )
-        cFlags |= 1;
-
-    // set Disposal-value
-    if( eDisposal == Disposal::Back )
-        cFlags |= ( 2 << 2 );
-    else if( eDisposal == Disposal::Previous )
-        cFlags |= ( 3 << 2 );
-
-    m_rGIF.WriteUChar( 0x21 );
-    m_rGIF.WriteUChar( 0xf9 );
-    m_rGIF.WriteUChar( 0x04 );
-    m_rGIF.WriteUChar( cFlags );
-    m_rGIF.WriteUInt16( nDelay );
-    m_rGIF.WriteUChar( m_pAcc->GetBestPaletteIndex( BMP_COL_TRANS ) );
-    m_rGIF.WriteUChar( 0x00 );
-
-    if( m_rGIF.GetError() )
-        bStatus = false;
-}
-
-
-void GIFWriter::WriteLocalHeader()
-{
-    if( !bStatus )
-        return;
-
-    const sal_uInt16    nPosX = static_cast<sal_uInt16>(nActX);
-    const sal_uInt16    nPosY = static_cast<sal_uInt16>(nActY);
-    const sal_uInt16    nWidth = static_cast<sal_uInt16>(m_pAcc->Width());
-    const sal_uInt16    nHeight = static_cast<sal_uInt16>(m_pAcc->Height());
-    sal_uInt8       cFlags = static_cast<sal_uInt8>( m_pAcc->GetBitCount() - 1 );
-
-    // set Interlaced-Flag
-    if( nInterlaced )
-        cFlags |= 0x40;
-
-    // set Flag for the local color palette
-    cFlags |= 0x80;
-
-    m_rGIF.WriteUChar( 0x2c );
-    m_rGIF.WriteUInt16( nPosX );
-    m_rGIF.WriteUInt16( nPosY );
-    m_rGIF.WriteUInt16( nWidth );
-    m_rGIF.WriteUInt16( nHeight );
-    m_rGIF.WriteUChar( cFlags );
-
-    if( m_rGIF.GetError() )
-        bStatus = false;
-}
-
-
-void GIFWriter::WritePalette()
-{
-    if( !(bStatus && m_pAcc->HasPalette()) )
-        return;
-
-    const sal_uInt16 nCount = m_pAcc->GetPaletteEntryCount();
-    const sal_uInt16 nMaxCount = ( 1 << m_pAcc->GetBitCount() );
-
-    for ( sal_uInt16 i = 0; i < nCount; i++ )
-    {
-        const BitmapColor& rColor = m_pAcc->GetPaletteColor( i );
-
-        m_rGIF.WriteUChar( rColor.GetRed() );
-        m_rGIF.WriteUChar( rColor.GetGreen() );
-        m_rGIF.WriteUChar( rColor.GetBlue() );
-    }
-
-    // fill up the rest with 0
-    if( nCount < nMaxCount )
-        m_rGIF.SeekRel( ( nMaxCount - nCount ) * 3 );
-
-    if( m_rGIF.GetError() )
-        bStatus = false;
-}
-
-
-void GIFWriter::WriteAccess()
-{
-    GIFLZWCompressor    aCompressor;
-    const tools::Long          nWidth = m_pAcc->Width();
-    const tools::Long          nHeight = m_pAcc->Height();
-    std::unique_ptr<sal_uInt8[]> pBuffer;
-    bool                bNative = m_pAcc->GetScanlineFormat() == ScanlineFormat::N8BitPal;
-
-    if( !bNative )
-        pBuffer.reset(new sal_uInt8[ nWidth ]);
-
-    if( !(bStatus && ( 8 == m_pAcc->GetBitCount() ) && m_pAcc->HasPalette()) )
-        return;
-
-    aCompressor.StartCompression( m_rGIF, m_pAcc->GetBitCount() );
-
-    tools::Long nY, nT;
-
-    for( tools::Long i = 0; i < nHeight; ++i )
-    {
-        if( nInterlaced )
-        {
-            nY = i << 3;
-
-            if( nY >= nHeight )
-            {
-                nT = i - ( ( nHeight + 7 ) >> 3 );
-                nY= ( nT << 3 ) + 4;
-
-                if( nY >= nHeight )
-                {
-                    nT -= ( nHeight + 3 ) >> 3;
-                    nY = ( nT << 2 ) + 2;
-
-                    if ( nY >= nHeight )
-                    {
-                        nT -= ( ( nHeight + 1 ) >> 2 );
-                        nY = ( nT << 1 ) + 1;
-                    }
-                }
-            }
-        }
-        else
-            nY = i;
-
-        if( bNative )
-            aCompressor.Compress( m_pAcc->GetScanline( nY ), nWidth );
-        else
-        {
-            Scanline pScanline = m_pAcc->GetScanline( nY );
-            for( tools::Long nX = 0; nX < nWidth; nX++ )
-                pBuffer[ nX ] = m_pAcc->GetIndexFromData( pScanline, nX );
-
-            aCompressor.Compress( pBuffer.get(), nWidth );
-        }
-
-        if ( m_rGIF.GetError() )
-            bStatus = false;
-
-        MayCallback( nMinPercent + ( nMaxPercent - nMinPercent ) * i / nHeight );
-
-        if( !bStatus )
-            break;
-    }
-
-    aCompressor.EndCompression();
-
-    if ( m_rGIF.GetError() )
-        bStatus = false;
-}
-
-
-void GIFWriter::WriteTerminator()
-{
-    if( bStatus )
-    {
-        m_rGIF.WriteUChar( 0x3b );
-
-        if( m_rGIF.GetError() )
-            bStatus = false;
-    }
-}
-
-
-extern "C" SAL_DLLPUBLIC_EXPORT bool
-egiGraphicExport( SvStream& rStream, Graphic& rGraphic, FilterConfigItem* pConfigItem )
-{
-    GIFWriter aWriter(rStream);
-    return aWriter.WriteGIF(rGraphic, pConfigItem);
-}
-
-/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/filter/source/graphicfilter/egif/giflzwc.cxx b/filter/source/graphicfilter/egif/giflzwc.cxx
deleted file mode 100644
index 41c65d2da4c2..000000000000
--- a/filter/source/graphicfilter/egif/giflzwc.cxx
+++ /dev/null
@@ -1,225 +0,0 @@
-/* -*- 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 "giflzwc.hxx"
-#include <array>
-
-
-class GIFImageDataOutputStream
-{
-private:
-
-    void        FlushBlockBuf();
-    inline void FlushBitsBufsFullBytes();
-
-    SvStream&   rStream;
-    std::array<sal_uInt8, 255>
-                    pBlockBuf;
-    sal_uInt8       nBlockBufSize;
-    sal_uInt32      nBitsBuf;
-    sal_uInt16      nBitsBufSize;
-
-public:
-
-                GIFImageDataOutputStream( SvStream & rGIF, sal_uInt8 nLZWDataSize );
-                ~GIFImageDataOutputStream();
-
-    inline void WriteBits( sal_uInt16 nCode, sal_uInt16 nCodeLen );
-};
-
-
-inline void GIFImageDataOutputStream::FlushBitsBufsFullBytes()
-{
-    while (nBitsBufSize>=8)
-    {
-        if( nBlockBufSize==255 )
-            FlushBlockBuf();
-
-        pBlockBuf[nBlockBufSize++] = static_cast<sal_uInt8>(nBitsBuf);
-        nBitsBuf >>= 8;
-        nBitsBufSize -= 8;
-    }
-}
-
-
-inline void GIFImageDataOutputStream::WriteBits( sal_uInt16 nCode, sal_uInt16 nCodeLen )
-{
-    if( nBitsBufSize+nCodeLen>32 )
-        FlushBitsBufsFullBytes();
-
-    nBitsBuf |= static_cast<sal_uInt32>(nCode) << nBitsBufSize;
-    nBitsBufSize = nBitsBufSize + nCodeLen;
-}
-
-
-GIFImageDataOutputStream::GIFImageDataOutputStream( SvStream & rGIF, sal_uInt8 nLZWDataSize ) :
-        rStream(rGIF), nBlockBufSize(0), nBitsBuf(0), nBitsBufSize(0)
-{
-    rStream.WriteUChar( nLZWDataSize );
-}
-
-
-GIFImageDataOutputStream::~GIFImageDataOutputStream()
-{
-    WriteBits(0,7);
-    FlushBitsBufsFullBytes();
-    FlushBlockBuf();
-    rStream.WriteUChar( 0 );
-}
-
-
-void GIFImageDataOutputStream::FlushBlockBuf()
-{
-    if( nBlockBufSize )
-    {
-        rStream.WriteUChar( nBlockBufSize );
-        rStream.WriteBytes(pBlockBuf.data(), nBlockBufSize);
-        nBlockBufSize = 0;
-    }
-}
-
-
-struct GIFLZWCTreeNode
-{
-
-    GIFLZWCTreeNode*    pBrother;       // next node which has the same father
-    GIFLZWCTreeNode*    pFirstChild;    // first
-    sal_uInt16          nCode;          // the code for the string of pixel values which comes about
-    sal_uInt16          nValue;         // the pixel value
-};
-
-
-GIFLZWCompressor::GIFLZWCompressor()
-    : pPrefix(nullptr), nDataSize(0), nClearCode(0),
-      nEOICode(0), nTableSize(0), nCodeSize(0)
-{
-}
-
-
-GIFLZWCompressor::~GIFLZWCompressor()
-{
-    if (pIDOS!=nullptr) EndCompression();
-}
-
-
-void GIFLZWCompressor::StartCompression( SvStream& rGIF, sal_uInt16 nPixelSize )
-{
-    if( pIDOS )
-        return;
-
-    sal_uInt16 i;
-
-    nDataSize = nPixelSize;
-
-    if( nDataSize < 2 )
-        nDataSize=2;
-
-    nClearCode=1<<nDataSize;
-    nEOICode=nClearCode+1;
-    nTableSize=nEOICode+1;
-    nCodeSize=nDataSize+1;
-
-    pIDOS.reset(new GIFImageDataOutputStream(rGIF,static_cast<sal_uInt8>(nDataSize)));
-    pTable.reset(new GIFLZWCTreeNode[4096]);
-
-    for (i=0; i<4096; i++)
-    {
-        pTable[i].pBrother = pTable[i].pFirstChild = nullptr;
-        pTable[i].nCode = i;
-        pTable[i].nValue = static_cast<sal_uInt8>( i );
-    }
-
-    pPrefix = nullptr;
-    pIDOS->WriteBits( nClearCode,nCodeSize );
-}
-
-void GIFLZWCompressor::Compress(sal_uInt8* pSrc, sal_uInt32 nSize)
-{
-    if( !pIDOS )
-        return;
-
-    GIFLZWCTreeNode* p;
-    sal_uInt16 i;
-    sal_uInt8 nV;
-
-    if( !pPrefix && nSize )
-    {
-        pPrefix=&pTable[*pSrc++];
-        nSize--;
-    }
-
-    while( nSize )
-    {
-        nSize--;
-        nV=*pSrc++;
-        for( p=pPrefix->pFirstChild; p!=nullptr; p=p->pBrother )
-        {
-            if (p->nValue==nV)
-                break;
-        }
-
-        if( p)
-            pPrefix=p;
-        else
-        {
-            pIDOS->WriteBits(pPrefix->nCode,nCodeSize);
-
-            if (nTableSize==4096)
-            {
-                pIDOS->WriteBits(nClearCode,nCodeSize);
-
-                for (i=0; i<nClearCode; i++)
-                    pTable[i].pFirstChild=nullptr;
-
-                nCodeSize=nDataSize+1;
-                nTableSize=nEOICode+1;
-            }
-            else
-            {
-                if(nTableSize==static_cast<sal_uInt16>(1<<nCodeSize))
-                    nCodeSize++;
-
-                p=&pTable[nTableSize++];
-                p->pBrother=pPrefix->pFirstChild;
-                pPrefix->pFirstChild=p;
-                p->nValue=nV;
-                p->pFirstChild=nullptr;
-            }
-
-            pPrefix=&pTable[nV];
-        }
-    }
-}
-
-void GIFLZWCompressor::EndCompression()
-{
-    if( pIDOS )
-    {
-        if( pPrefix )
-            pIDOS->WriteBits(pPrefix->nCode,nCodeSize);
-
-        pIDOS->WriteBits( nEOICode,nCodeSize );
-        pTable.reset();
-        pIDOS.reset();
-    }
-}
-
-/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/filter/source/graphicfilter/egif/giflzwc.hxx b/filter/source/graphicfilter/egif/giflzwc.hxx
deleted file mode 100644
index 057710c85230..000000000000
--- a/filter/source/graphicfilter/egif/giflzwc.hxx
+++ /dev/null
@@ -1,55 +0,0 @@
-/* -*- 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 .
- */
-
-#ifndef INCLUDED_FILTER_SOURCE_GRAPHICFILTER_EGIF_GIFLZWC_HXX
-#define INCLUDED_FILTER_SOURCE_GRAPHICFILTER_EGIF_GIFLZWC_HXX
-
-#include <vcl/mapmod.hxx>
-
-
-class   GIFImageDataOutputStream;
-struct  GIFLZWCTreeNode;
-
-
-class GIFLZWCompressor
-{
-private:
-
-    std::unique_ptr<GIFImageDataOutputStream> pIDOS;
-    std::unique_ptr<GIFLZWCTreeNode[]> pTable;
-    GIFLZWCTreeNode*            pPrefix;
-    sal_uInt16                  nDataSize;
-    sal_uInt16                  nClearCode;
-    sal_uInt16                  nEOICode;
-    sal_uInt16                  nTableSize;
-    sal_uInt16                  nCodeSize;
-
-public:
-
-                                GIFLZWCompressor();
-                                ~GIFLZWCompressor();
-
-    void                        StartCompression( SvStream& rGIF, sal_uInt16 nPixelSize );
-    void                        Compress(sal_uInt8* pSrc, sal_uInt32 nSize);
-    void                        EndCompression();
-};
-
-#endif // INCLUDED_FILTER_SOURCE_GRAPHICFILTER_EGIF_GIFLZWC_HXX
-
-/* vim:set shiftwidth=4 softtabstop=4 expandtab: */