Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1067 insertions, 0 deletions

diff --git a/vcl/win/gdi/salbmp.cxx b/vcl/win/gdi/salbmp.cxx
new file mode 100644
index 000000000..f2b21a666
--- /dev/null
+++ b/vcl/win/gdi/salbmp.cxx
@@ -0,0 +1,1067 @@
+/*
+ * 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 <svsys.h>
+#include <vcl/bitmap.hxx>
+#include <vcl/BitmapAccessMode.hxx>
+#include <vcl/BitmapBuffer.hxx>
+#include <vcl/BitmapPalette.hxx>
+#include <vcl/ColorMask.hxx>
+#include <vcl/Scanline.hxx>
+#include <com/sun/star/beans/XFastPropertySet.hpp>
+#include <win/wincomp.hxx>
+#include <win/salgdi.h>
+#include <win/saldata.hxx>
+#include <win/salbmp.h>
+#include <string.h>
+#include <vcl/timer.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <sal/log.hxx>
+#include <tools/helpers.hxx>
+#include <map>
+
+#if defined _MSC_VER
+#ifndef min
+#define min(a,b)    (((a) < (b)) ? (a) : (b))
+#endif
+#ifndef max
+#define max(a,b)    (((a) > (b)) ? (a) : (b))
+#endif
+#endif
+
+#include <prewin.h>
+#include <gdiplus.h>
+#include <postwin.h>
+
+#if defined _MSC_VER
+#undef min
+#undef max
+#endif
+
+static void ImplSetPixel4( sal_uInt8* pScanline, long nX, const BYTE cIndex )
+{
+    BYTE& rByte = pScanline[ nX >> 1 ];
+
+    if ( nX & 1 )
+    {
+        rByte &= 0xf0;
+        rByte |= cIndex & 0x0f;
+    }
+    else
+    {
+        rByte &= 0x0f;
+        rByte |= cIndex << 4;
+    }
+}
+
+WinSalBitmap::WinSalBitmap()
+:   SalBitmap(),
+    basegfx::SystemDependentDataHolder(),
+    maSize(),
+    mhDIB(nullptr),
+    mhDDB(nullptr),
+    mnBitCount(0)
+{
+}
+
+WinSalBitmap::~WinSalBitmap()
+{
+    Destroy();
+}
+
+void WinSalBitmap::Destroy()
+{
+    if( mhDIB )
+        GlobalFree( mhDIB );
+    else if( mhDDB )
+        DeleteObject( mhDDB );
+
+    maSize = Size();
+    mnBitCount = 0;
+}
+
+namespace {
+
+class SystemDependentData_GdiPlusBitmap : public basegfx::SystemDependentData
+{
+private:
+    std::shared_ptr<Gdiplus::Bitmap>    mpGdiPlusBitmap;
+    const WinSalBitmap*                 mpAssociatedAlpha;
+
+public:
+    SystemDependentData_GdiPlusBitmap(
+        basegfx::SystemDependentDataManager& rSystemDependentDataManager,
+        const std::shared_ptr<Gdiplus::Bitmap>& rGdiPlusBitmap,
+        const WinSalBitmap* pAssociatedAlpha);
+
+    const WinSalBitmap* getAssociatedAlpha() const { return mpAssociatedAlpha; }
+    const std::shared_ptr<Gdiplus::Bitmap>& getGdiPlusBitmap() const { return mpGdiPlusBitmap; }
+
+    virtual sal_Int64 estimateUsageInBytes() const override;
+};
+
+}
+
+SystemDependentData_GdiPlusBitmap::SystemDependentData_GdiPlusBitmap(
+    basegfx::SystemDependentDataManager& rSystemDependentDataManager,
+    const std::shared_ptr<Gdiplus::Bitmap>& rGdiPlusBitmap,
+    const WinSalBitmap* pAssociatedAlpha)
+:   basegfx::SystemDependentData(rSystemDependentDataManager),
+    mpGdiPlusBitmap(rGdiPlusBitmap),
+    mpAssociatedAlpha(pAssociatedAlpha)
+{
+}
+
+sal_Int64 SystemDependentData_GdiPlusBitmap::estimateUsageInBytes() const
+{
+    sal_Int64 nRetval(0);
+
+    if(mpGdiPlusBitmap)
+    {
+        const UINT nWidth(mpGdiPlusBitmap->GetWidth());
+        const UINT nHeight(mpGdiPlusBitmap->GetHeight());
+
+        if(0 != nWidth && 0 != nHeight)
+        {
+            nRetval = nWidth * nHeight;
+
+            switch(mpGdiPlusBitmap->GetPixelFormat())
+            {
+                case PixelFormat1bppIndexed:
+                    nRetval /= 8;
+                    break;
+                case PixelFormat4bppIndexed:
+                    nRetval /= 4;
+                    break;
+                case PixelFormat16bppGrayScale:
+                case PixelFormat16bppRGB555:
+                case PixelFormat16bppRGB565:
+                case PixelFormat16bppARGB1555:
+                    nRetval *= 2;
+                    break;
+                case PixelFormat24bppRGB:
+                    nRetval *= 3;
+                    break;
+                case PixelFormat32bppRGB:
+                case PixelFormat32bppARGB:
+                case PixelFormat32bppPARGB:
+                case PixelFormat32bppCMYK:
+                    nRetval *= 4;
+                    break;
+                case PixelFormat48bppRGB:
+                    nRetval *= 6;
+                    break;
+                case PixelFormat64bppARGB:
+                case PixelFormat64bppPARGB:
+                    nRetval *= 8;
+                    break;
+                default:
+                case PixelFormat8bppIndexed:
+                    break;
+            }
+        }
+    }
+
+    return nRetval;
+}
+
+std::shared_ptr< Gdiplus::Bitmap > WinSalBitmap::ImplGetGdiPlusBitmap(const WinSalBitmap* pAlphaSource) const
+{
+    std::shared_ptr< Gdiplus::Bitmap > aRetval;
+
+    // try to access buffered data
+    std::shared_ptr<SystemDependentData_GdiPlusBitmap> pSystemDependentData_GdiPlusBitmap(
+        getSystemDependentData<SystemDependentData_GdiPlusBitmap>());
+
+    if(pSystemDependentData_GdiPlusBitmap)
+    {
+        // check data validity
+        if(pSystemDependentData_GdiPlusBitmap->getAssociatedAlpha() != pAlphaSource
+            || 0 == maSize.Width()
+            || 0 == maSize.Height())
+        {
+            // #122350# if associated alpha with which the GDIPlus was constructed has changed
+            // it is necessary to remove it from buffer, reset reference to it and reconstruct
+            // data invalid, forget
+            pSystemDependentData_GdiPlusBitmap.reset();
+        }
+    }
+
+    if(pSystemDependentData_GdiPlusBitmap)
+    {
+        // use from buffer
+        aRetval = pSystemDependentData_GdiPlusBitmap->getGdiPlusBitmap();
+    }
+    else if(!maSize.IsEmpty())
+    {
+        // create and set data
+        const WinSalBitmap* pAssociatedAlpha(nullptr);
+
+        if(pAlphaSource)
+        {
+            aRetval.reset(const_cast< WinSalBitmap* >(this)->ImplCreateGdiPlusBitmap(*pAlphaSource));
+            pAssociatedAlpha = pAlphaSource;
+        }
+        else
+        {
+            aRetval.reset(const_cast< WinSalBitmap* >(this)->ImplCreateGdiPlusBitmap());
+            pAssociatedAlpha = nullptr;
+        }
+
+        // add to buffering mechanism
+        addOrReplaceSystemDependentData<SystemDependentData_GdiPlusBitmap>(
+            ImplGetSystemDependentDataManager(),
+            aRetval,
+            pAssociatedAlpha);
+    }
+
+    return aRetval;
+}
+
+Gdiplus::Bitmap* WinSalBitmap::ImplCreateGdiPlusBitmap()
+{
+    Gdiplus::Bitmap* pRetval(nullptr);
+    WinSalBitmap* pSalRGB = this;
+    WinSalBitmap* pExtraWinSalRGB = nullptr;
+
+    if(!pSalRGB->ImplGethDIB())
+    {
+        // we need DIB for success with AcquireBuffer, create a replacement WinSalBitmap
+        pExtraWinSalRGB = new WinSalBitmap();
+        pExtraWinSalRGB->Create(*pSalRGB, pSalRGB->GetBitCount());
+        pSalRGB = pExtraWinSalRGB;
+    }
+
+    BitmapBuffer* pRGB = pSalRGB->AcquireBuffer(BitmapAccessMode::Read);
+    std::unique_ptr<BitmapBuffer> pExtraRGB;
+
+    if(pRGB && ScanlineFormat::N24BitTcBgr != RemoveScanline(pRGB->mnFormat))
+    {
+        // convert source bitmap to BMP_FORMAT_24BIT_TC_BGR format if not yet in that format
+        SalTwoRect aSalTwoRect(0, 0, pRGB->mnWidth, pRGB->mnHeight, 0, 0, pRGB->mnWidth, pRGB->mnHeight);
+        pExtraRGB = StretchAndConvert(
+            *pRGB,
+            aSalTwoRect,
+            ScanlineFormat::N24BitTcBgr);
+
+        pSalRGB->ReleaseBuffer(pRGB, BitmapAccessMode::Write);
+        pRGB = pExtraRGB.get();
+    }
+
+    if(pRGB
+        && pRGB->mnWidth > 0
+        && pRGB->mnHeight > 0
+        && ScanlineFormat::N24BitTcBgr == RemoveScanline(pRGB->mnFormat))
+    {
+        const sal_uInt32 nW(pRGB->mnWidth);
+        const sal_uInt32 nH(pRGB->mnHeight);
+
+        pRetval = new Gdiplus::Bitmap(nW, nH, PixelFormat24bppRGB);
+
+        if ( pRetval->GetLastStatus() == Gdiplus::Ok )
+        {
+            sal_uInt8* pSrcRGB(pRGB->mpBits);
+            const sal_uInt32 nExtraRGB(pRGB->mnScanlineSize - (nW * 3));
+            const bool bTopDown(pRGB->mnFormat & ScanlineFormat::TopDown);
+            const Gdiplus::Rect aAllRect(0, 0, nW, nH);
+            Gdiplus::BitmapData aGdiPlusBitmapData;
+            pRetval->LockBits(&aAllRect, Gdiplus::ImageLockModeWrite, PixelFormat24bppRGB, &aGdiPlusBitmapData);
+
+            // copy data to Gdiplus::Bitmap; format is BGR here in both cases, so memcpy is possible
+            for(sal_uInt32 y(0); y < nH; y++)
+            {
+                const sal_uInt32 nYInsert(bTopDown ? y : nH - y - 1);
+                sal_uInt8* targetPixels = static_cast<sal_uInt8*>(aGdiPlusBitmapData.Scan0) + (nYInsert * aGdiPlusBitmapData.Stride);
+
+                memcpy(targetPixels, pSrcRGB, nW * 3);
+                pSrcRGB += nW * 3 + nExtraRGB;
+            }
+
+            pRetval->UnlockBits(&aGdiPlusBitmapData);
+        }
+        else
+        {
+            delete pRetval;
+            pRetval = nullptr;
+        }
+    }
+
+    if(pExtraRGB)
+    {
+        // #i123478# shockingly, BitmapBuffer does not free the memory it is controlling
+        // in its destructor, this *has to be done by hand*. Doing it here now
+        delete[] pExtraRGB->mpBits;
+        pExtraRGB.reset();
+    }
+    else
+    {
+        pSalRGB->ReleaseBuffer(pRGB, BitmapAccessMode::Read);
+    }
+
+    if(pExtraWinSalRGB)
+    {
+        delete pExtraWinSalRGB;
+    }
+
+    return pRetval;
+}
+
+Gdiplus::Bitmap* WinSalBitmap::ImplCreateGdiPlusBitmap(const WinSalBitmap& rAlphaSource)
+{
+    Gdiplus::Bitmap* pRetval(nullptr);
+    WinSalBitmap* pSalRGB = this;
+    WinSalBitmap* pExtraWinSalRGB = nullptr;
+
+    if(!pSalRGB->ImplGethDIB())
+    {
+        // we need DIB for success with AcquireBuffer, create a replacement WinSalBitmap
+        pExtraWinSalRGB = new WinSalBitmap();
+        pExtraWinSalRGB->Create(*pSalRGB, pSalRGB->GetBitCount());
+        pSalRGB = pExtraWinSalRGB;
+    }
+
+    BitmapBuffer* pRGB = pSalRGB->AcquireBuffer(BitmapAccessMode::Read);
+    std::unique_ptr<BitmapBuffer> pExtraRGB;
+
+    if(pRGB && ScanlineFormat::N24BitTcBgr != RemoveScanline(pRGB->mnFormat))
+    {
+        // convert source bitmap to canlineFormat::N24BitTcBgr format if not yet in that format
+        SalTwoRect aSalTwoRect(0, 0, pRGB->mnWidth, pRGB->mnHeight, 0, 0, pRGB->mnWidth, pRGB->mnHeight);
+        pExtraRGB = StretchAndConvert(
+            *pRGB,
+            aSalTwoRect,
+            ScanlineFormat::N24BitTcBgr);
+
+        pSalRGB->ReleaseBuffer(pRGB, BitmapAccessMode::Read);
+        pRGB = pExtraRGB.get();
+    }
+
+    WinSalBitmap* pSalA = const_cast< WinSalBitmap* >(&rAlphaSource);
+    WinSalBitmap* pExtraWinSalA = nullptr;
+
+    if(!pSalA->ImplGethDIB())
+    {
+        // we need DIB for success with AcquireBuffer, create a replacement WinSalBitmap
+        pExtraWinSalA = new WinSalBitmap();
+        pExtraWinSalA->Create(*pSalA, pSalA->GetBitCount());
+        pSalA = pExtraWinSalA;
+    }
+
+    BitmapBuffer* pA = pSalA->AcquireBuffer(BitmapAccessMode::Read);
+    std::unique_ptr<BitmapBuffer> pExtraA;
+
+    if(pA && ScanlineFormat::N8BitPal != RemoveScanline(pA->mnFormat))
+    {
+        // convert alpha bitmap to ScanlineFormat::N8BitPal format if not yet in that format
+        SalTwoRect aSalTwoRect(0, 0, pA->mnWidth, pA->mnHeight, 0, 0, pA->mnWidth, pA->mnHeight);
+        const BitmapPalette& rTargetPalette = Bitmap::GetGreyPalette(256);
+
+        pExtraA = StretchAndConvert(
+            *pA,
+            aSalTwoRect,
+            ScanlineFormat::N8BitPal,
+            &rTargetPalette);
+
+        pSalA->ReleaseBuffer(pA, BitmapAccessMode::Read);
+        pA = pExtraA.get();
+    }
+
+    if(pRGB
+        && pA
+        && pRGB->mnWidth > 0
+        && pRGB->mnHeight > 0
+        && pRGB->mnWidth == pA->mnWidth
+        && pRGB->mnHeight == pA->mnHeight
+        && ScanlineFormat::N24BitTcBgr == RemoveScanline(pRGB->mnFormat)
+        && ScanlineFormat::N8BitPal == RemoveScanline(pA->mnFormat))
+    {
+        // we have alpha and bitmap in known formats, create GdiPlus Bitmap as 32bit ARGB
+        const sal_uInt32 nW(pRGB->mnWidth);
+        const sal_uInt32 nH(pRGB->mnHeight);
+
+        pRetval = new Gdiplus::Bitmap(nW, nH, PixelFormat32bppARGB);
+
+        if ( pRetval->GetLastStatus() == Gdiplus::Ok ) // 2nd place to secure with new Gdiplus::Bitmap
+        {
+            sal_uInt8* pSrcRGB(pRGB->mpBits);
+            sal_uInt8* pSrcA(pA->mpBits);
+            const sal_uInt32 nExtraRGB(pRGB->mnScanlineSize - (nW * 3));
+            const sal_uInt32 nExtraA(pA->mnScanlineSize - nW);
+            const bool bTopDown(pRGB->mnFormat & ScanlineFormat::TopDown);
+            const Gdiplus::Rect aAllRect(0, 0, nW, nH);
+            Gdiplus::BitmapData aGdiPlusBitmapData;
+            pRetval->LockBits(&aAllRect, Gdiplus::ImageLockModeWrite, PixelFormat32bppARGB, &aGdiPlusBitmapData);
+
+            // copy data to Gdiplus::Bitmap; format is BGRA; need to mix BGR from Bitmap and
+            // A from alpha, so inner loop is needed (who invented BitmapEx..?)
+            for(sal_uInt32 y(0); y < nH; y++)
+            {
+                const sal_uInt32 nYInsert(bTopDown ? y : nH - y - 1);
+                sal_uInt8* targetPixels = static_cast<sal_uInt8*>(aGdiPlusBitmapData.Scan0) + (nYInsert * aGdiPlusBitmapData.Stride);
+
+                for(sal_uInt32 x(0); x < nW; x++)
+                {
+                    *targetPixels++ = *pSrcRGB++;
+                    *targetPixels++ = *pSrcRGB++;
+                    *targetPixels++ = *pSrcRGB++;
+                    *targetPixels++ = 0xff - *pSrcA++;
+                }
+
+                pSrcRGB += nExtraRGB;
+                pSrcA += nExtraA;
+            }
+
+            pRetval->UnlockBits(&aGdiPlusBitmapData);
+        }
+        else
+        {
+            delete pRetval;
+            pRetval = nullptr;
+        }
+    }
+
+    if(pExtraA)
+    {
+        // #i123478# shockingly, BitmapBuffer does not free the memory it is controlling
+        // in its destructor, this *has to be done handish*. Doing it here now
+        delete[] pExtraA->mpBits;
+        pExtraA.reset();
+    }
+    else
+    {
+        pSalA->ReleaseBuffer(pA, BitmapAccessMode::Read);
+    }
+
+    if(pExtraWinSalA)
+    {
+        delete pExtraWinSalA;
+    }
+
+    if(pExtraRGB)
+    {
+        // #i123478# shockingly, BitmapBuffer does not free the memory it is controlling
+        // in its destructor, this *has to be done by hand*. Doing it here now
+        delete[] pExtraRGB->mpBits;
+        pExtraRGB.reset();
+    }
+    else
+    {
+        pSalRGB->ReleaseBuffer(pRGB, BitmapAccessMode::Read);
+    }
+
+    if(pExtraWinSalRGB)
+    {
+        delete pExtraWinSalRGB;
+    }
+
+    return pRetval;
+}
+
+bool WinSalBitmap::Create( HANDLE hBitmap, bool bDIB, bool bCopyHandle )
+{
+    bool bRet = true;
+
+    if( bDIB )
+        mhDIB = static_cast<HGLOBAL>( bCopyHandle ? ImplCopyDIBOrDDB( hBitmap, true ) : hBitmap );
+    else
+        mhDDB = static_cast<HBITMAP>( bCopyHandle ? ImplCopyDIBOrDDB( hBitmap, false ) : hBitmap );
+
+    if( mhDIB )
+    {
+        PBITMAPINFOHEADER pBIH = static_cast<PBITMAPINFOHEADER>(GlobalLock( mhDIB ));
+
+        maSize = Size( pBIH->biWidth, pBIH->biHeight );
+        mnBitCount = pBIH->biBitCount;
+
+        if( mnBitCount )
+            mnBitCount = ( mnBitCount <= 1 ) ? 1 : ( mnBitCount <= 4 ) ? 4 : ( mnBitCount <= 8 ) ? 8 : 24;
+
+        GlobalUnlock( mhDIB );
+    }
+    else if( mhDDB )
+    {
+        BITMAP  aDDBInfo;
+
+        if( GetObjectW( mhDDB, sizeof( aDDBInfo ), &aDDBInfo ) )
+        {
+            maSize = Size( aDDBInfo.bmWidth, aDDBInfo.bmHeight );
+            mnBitCount = aDDBInfo.bmPlanes * aDDBInfo.bmBitsPixel;
+
+            if( mnBitCount )
+            {
+                mnBitCount = ( mnBitCount <= 1 ) ? 1 :
+                             ( mnBitCount <= 4 ) ? 4 :
+                             ( mnBitCount <= 8 ) ? 8 : 24;
+            }
+        }
+        else
+        {
+            mhDDB = nullptr;
+            bRet = false;
+        }
+    }
+    else
+        bRet = false;
+
+    return bRet;
+}
+
+bool WinSalBitmap::Create( const Size& rSize, sal_uInt16 nBitCount, const BitmapPalette& rPal )
+{
+    bool bRet = false;
+
+    mhDIB = ImplCreateDIB( rSize, nBitCount, rPal );
+
+    if( mhDIB )
+    {
+        maSize = rSize;
+        mnBitCount = nBitCount;
+        bRet = true;
+    }
+
+    return bRet;
+}
+
+bool WinSalBitmap::Create( const SalBitmap& rSSalBitmap )
+{
+    bool bRet = false;
+    const WinSalBitmap& rSalBitmap = static_cast<const WinSalBitmap&>(rSSalBitmap);
+
+    if ( rSalBitmap.mhDIB || rSalBitmap.mhDDB )
+    {
+        HANDLE hNewHdl = ImplCopyDIBOrDDB( rSalBitmap.mhDIB ? rSalBitmap.mhDIB : rSalBitmap.mhDDB,
+                                           rSalBitmap.mhDIB != nullptr );
+
+        if ( hNewHdl )
+        {
+            if( rSalBitmap.mhDIB )
+                mhDIB = static_cast<HGLOBAL>(hNewHdl);
+            else if( rSalBitmap.mhDDB )
+                mhDDB = static_cast<HBITMAP>(hNewHdl);
+
+            maSize = rSalBitmap.maSize;
+            mnBitCount = rSalBitmap.mnBitCount;
+
+            bRet = true;
+        }
+    }
+
+    return bRet;
+}
+
+bool WinSalBitmap::Create( const SalBitmap& rSSalBmp, SalGraphics* pSGraphics )
+{
+    bool bRet = false;
+
+    const WinSalBitmap& rSalBmp = static_cast<const WinSalBitmap&>(rSSalBmp);
+    WinSalGraphics* pGraphics = static_cast<WinSalGraphics*>(pSGraphics);
+
+    if( rSalBmp.mhDIB )
+    {
+        PBITMAPINFO         pBI = static_cast<PBITMAPINFO>(GlobalLock( rSalBmp.mhDIB ));
+        HDC                 hDC  = pGraphics->getHDC();
+        HBITMAP             hNewDDB;
+        BITMAP              aDDBInfo;
+        PBYTE               pBits = reinterpret_cast<PBYTE>(pBI) + pBI->bmiHeader.biSize +
+                            ImplGetDIBColorCount( rSalBmp.mhDIB ) * sizeof( RGBQUAD );
+
+        if( pBI->bmiHeader.biBitCount == 1 )
+        {
+            hNewDDB = CreateBitmap( pBI->bmiHeader.biWidth, pBI->bmiHeader.biHeight, 1, 1, nullptr );
+
+            if( hNewDDB )
+                SetDIBits( hDC, hNewDDB, 0, pBI->bmiHeader.biHeight, pBits, pBI, DIB_RGB_COLORS );
+        }
+        else
+            hNewDDB = CreateDIBitmap( hDC, &pBI->bmiHeader, CBM_INIT, pBits, pBI, DIB_RGB_COLORS );
+
+        GlobalUnlock( rSalBmp.mhDIB );
+
+        if( hNewDDB && GetObjectW( hNewDDB, sizeof( aDDBInfo ), &aDDBInfo ) )
+        {
+            mhDDB = hNewDDB;
+            maSize = Size( aDDBInfo.bmWidth, aDDBInfo.bmHeight );
+            mnBitCount = aDDBInfo.bmPlanes * aDDBInfo.bmBitsPixel;
+
+            bRet = true;
+        }
+        else if( hNewDDB )
+            DeleteObject( hNewDDB );
+    }
+
+    return bRet;
+}
+
+bool WinSalBitmap::Create( const SalBitmap& rSSalBmp, sal_uInt16 nNewBitCount )
+{
+    bool bRet = false;
+
+    const WinSalBitmap& rSalBmp = static_cast<const WinSalBitmap&>(rSSalBmp);
+
+    if( rSalBmp.mhDDB )
+    {
+        mhDIB = ImplCreateDIB( rSalBmp.maSize, nNewBitCount, BitmapPalette() );
+
+        if( mhDIB )
+        {
+            PBITMAPINFO pBI = static_cast<PBITMAPINFO>(GlobalLock( mhDIB ));
+            const int   nLines = static_cast<int>(rSalBmp.maSize.Height());
+            HDC         hDC = GetDC( nullptr );
+            PBYTE       pBits = reinterpret_cast<PBYTE>(pBI) + pBI->bmiHeader.biSize +
+                                ImplGetDIBColorCount( mhDIB ) * sizeof( RGBQUAD );
+            SalData*    pSalData = GetSalData();
+            HPALETTE    hOldPal = nullptr;
+
+            if ( pSalData->mhDitherPal )
+            {
+                hOldPal = SelectPalette( hDC, pSalData->mhDitherPal, TRUE );
+                RealizePalette( hDC );
+            }
+
+            if( GetDIBits( hDC, rSalBmp.mhDDB, 0, nLines, pBits, pBI, DIB_RGB_COLORS ) == nLines )
+            {
+                GlobalUnlock( mhDIB );
+                maSize = rSalBmp.maSize;
+                mnBitCount = nNewBitCount;
+                bRet = true;
+            }
+            else
+            {
+                GlobalUnlock( mhDIB );
+                GlobalFree( mhDIB );
+                mhDIB = nullptr;
+            }
+
+            if( hOldPal )
+                SelectPalette( hDC, hOldPal, TRUE );
+
+            ReleaseDC( nullptr, hDC );
+        }
+    }
+
+    return bRet;
+}
+
+bool WinSalBitmap::Create( const css::uno::Reference< css::rendering::XBitmapCanvas >& rBitmapCanvas, Size& /*rSize*/, bool bMask )
+{
+    css::uno::Reference< css::beans::XFastPropertySet >
+        xFastPropertySet( rBitmapCanvas, css::uno::UNO_QUERY );
+
+    if( xFastPropertySet.get() ) {
+        css::uno::Sequence< css::uno::Any > args;
+
+        if( xFastPropertySet->getFastPropertyValue(bMask ? 2 : 1) >>= args ) {
+            sal_Int64 aHBmp64;
+
+            if( args[0] >>= aHBmp64 ) {
+                return Create( HBITMAP(aHBmp64), false, false );
+            }
+        }
+    }
+    return false;
+}
+
+sal_uInt16 WinSalBitmap::ImplGetDIBColorCount( HGLOBAL hDIB )
+{
+    sal_uInt16 nColors = 0;
+
+    if( hDIB )
+    {
+        PBITMAPINFO         pBI = static_cast<PBITMAPINFO>(GlobalLock( hDIB ));
+
+        if ( pBI->bmiHeader.biSize != sizeof( BITMAPCOREHEADER ) )
+        {
+            if( pBI->bmiHeader.biBitCount <= 8 )
+            {
+                if ( pBI->bmiHeader.biClrUsed )
+                    nColors = static_cast<sal_uInt16>(pBI->bmiHeader.biClrUsed);
+                else
+                    nColors = 1 << pBI->bmiHeader.biBitCount;
+            }
+        }
+        else if( reinterpret_cast<PBITMAPCOREHEADER>(pBI)->bcBitCount <= 8 )
+            nColors = 1 << reinterpret_cast<PBITMAPCOREHEADER>(pBI)->bcBitCount;
+
+        GlobalUnlock( hDIB );
+    }
+
+    return nColors;
+}
+
+HGLOBAL WinSalBitmap::ImplCreateDIB( const Size& rSize, sal_uInt16 nBits, const BitmapPalette& rPal )
+{
+    SAL_WARN_IF( nBits != 1 && nBits != 4 && nBits != 8 && nBits != 24, "vcl", "Unsupported BitCount!" );
+
+    HGLOBAL hDIB = nullptr;
+
+    if( rSize.IsEmpty() )
+        return hDIB;
+
+    // calculate bitmap size in Bytes
+    const sal_uLong nAlignedWidth4Bytes = AlignedWidth4Bytes( nBits * rSize.Width() );
+    const sal_uLong nImageSize = nAlignedWidth4Bytes * rSize.Height();
+    bool bOverflow = (nImageSize / nAlignedWidth4Bytes) != static_cast<sal_uLong>(rSize.Height());
+    if( bOverflow )
+        return hDIB;
+
+    // allocate bitmap memory including header and palette
+    const sal_uInt16 nColors = (nBits <= 8) ? (1 << nBits) : 0;
+    const sal_uLong nHeaderSize = sizeof( BITMAPINFOHEADER ) + nColors * sizeof( RGBQUAD );
+    bOverflow = (nHeaderSize + nImageSize) < nImageSize;
+    if( bOverflow )
+        return hDIB;
+
+    hDIB = GlobalAlloc( GHND, nHeaderSize + nImageSize );
+    if( !hDIB )
+        return hDIB;
+
+    PBITMAPINFO pBI = static_cast<PBITMAPINFO>( GlobalLock( hDIB ) );
+    PBITMAPINFOHEADER pBIH = reinterpret_cast<PBITMAPINFOHEADER>( pBI );
+
+    pBIH->biSize = sizeof( BITMAPINFOHEADER );
+    pBIH->biWidth = rSize.Width();
+    pBIH->biHeight = rSize.Height();
+    pBIH->biPlanes = 1;
+    pBIH->biBitCount = nBits;
+    pBIH->biCompression = BI_RGB;
+    pBIH->biSizeImage = nImageSize;
+    pBIH->biXPelsPerMeter = 0;
+    pBIH->biYPelsPerMeter = 0;
+    pBIH->biClrUsed = 0;
+    pBIH->biClrImportant = 0;
+
+    if( nColors )
+    {
+        // copy the palette entries if any
+        const sal_uInt16 nMinCount = std::min( nColors, rPal.GetEntryCount() );
+        if( nMinCount )
+            memcpy( pBI->bmiColors, rPal.ImplGetColorBuffer(), nMinCount * sizeof(RGBQUAD) );
+    }
+
+    GlobalUnlock( hDIB );
+
+    return hDIB;
+}
+
+HANDLE WinSalBitmap::ImplCopyDIBOrDDB( HANDLE hHdl, bool bDIB )
+{
+    HANDLE  hCopy = nullptr;
+
+    if ( bDIB && hHdl )
+    {
+        const sal_uLong nSize = GlobalSize( hHdl );
+
+        if ( (hCopy = GlobalAlloc( GHND, nSize  )) != nullptr )
+        {
+            memcpy( GlobalLock( hCopy ), GlobalLock( hHdl ), nSize );
+
+            GlobalUnlock( hCopy );
+            GlobalUnlock( hHdl );
+        }
+    }
+    else if ( hHdl )
+    {
+        BITMAP aBmp;
+
+        // find out size of source bitmap
+        GetObjectW( hHdl, sizeof( aBmp ), &aBmp );
+
+        // create destination bitmap
+        if ( (hCopy = CreateBitmapIndirect( &aBmp )) != nullptr )
+        {
+            HDC     hBmpDC = CreateCompatibleDC( nullptr );
+            HBITMAP hBmpOld = static_cast<HBITMAP>(SelectObject( hBmpDC, hHdl ));
+            HDC     hCopyDC = CreateCompatibleDC( hBmpDC );
+            HBITMAP hCopyOld = static_cast<HBITMAP>(SelectObject( hCopyDC, hCopy ));
+
+            BitBlt( hCopyDC, 0, 0, aBmp.bmWidth, aBmp.bmHeight, hBmpDC, 0, 0, SRCCOPY );
+
+            SelectObject( hCopyDC, hCopyOld );
+            DeleteDC( hCopyDC );
+
+            SelectObject( hBmpDC, hBmpOld );
+            DeleteDC( hBmpDC );
+        }
+    }
+
+    return hCopy;
+}
+
+BitmapBuffer* WinSalBitmap::AcquireBuffer( BitmapAccessMode /*nMode*/ )
+{
+    BitmapBuffer* pBuffer = nullptr;
+
+    if( mhDIB )
+    {
+        PBITMAPINFO         pBI = static_cast<PBITMAPINFO>(GlobalLock( mhDIB ));
+        PBITMAPINFOHEADER   pBIH = &pBI->bmiHeader;
+
+        if( ( pBIH->biCompression == BI_RLE4 ) || ( pBIH->biCompression == BI_RLE8 ) )
+        {
+            Size    aSizePix( pBIH->biWidth, pBIH->biHeight );
+            HGLOBAL hNewDIB = ImplCreateDIB( aSizePix, pBIH->biBitCount, BitmapPalette() );
+
+            if( hNewDIB )
+            {
+                PBITMAPINFO         pNewBI = static_cast<PBITMAPINFO>(GlobalLock( hNewDIB ));
+                PBITMAPINFOHEADER   pNewBIH = &pNewBI->bmiHeader;
+                const sal_uInt16        nColorCount = ImplGetDIBColorCount( hNewDIB );
+                const sal_uLong         nOffset = pBI->bmiHeader.biSize + nColorCount * sizeof( RGBQUAD );
+                BYTE*               pOldBits = reinterpret_cast<PBYTE>(pBI) + nOffset;
+                BYTE*               pNewBits = reinterpret_cast<PBYTE>(pNewBI) + nOffset;
+
+                memcpy( pNewBI, pBI, nOffset );
+                pNewBIH->biCompression = 0;
+                ImplDecodeRLEBuffer( pOldBits, pNewBits, aSizePix, pBIH->biCompression == BI_RLE4 );
+
+                GlobalUnlock( mhDIB );
+                GlobalFree( mhDIB );
+                mhDIB = hNewDIB;
+                pBI = pNewBI;
+                pBIH = pNewBIH;
+            }
+        }
+
+        if( pBIH->biPlanes == 1 )
+        {
+            pBuffer = new BitmapBuffer;
+
+            pBuffer->mnFormat = pBIH->biBitCount == 1 ? ScanlineFormat::N1BitMsbPal :
+                                pBIH->biBitCount == 4 ? ScanlineFormat::N4BitMsnPal :
+                                pBIH->biBitCount == 8 ? ScanlineFormat::N8BitPal :
+                                pBIH->biBitCount == 24 ? ScanlineFormat::N24BitTcBgr :
+                                pBIH->biBitCount == 32 ? ScanlineFormat::N32BitTcMask :
+                                ScanlineFormat::NONE;
+
+            if( RemoveScanline( pBuffer->mnFormat ) != ScanlineFormat::NONE )
+            {
+                pBuffer->mnWidth = maSize.Width();
+                pBuffer->mnHeight = maSize.Height();
+                pBuffer->mnScanlineSize = AlignedWidth4Bytes( maSize.Width() * pBIH->biBitCount );
+                pBuffer->mnBitCount = static_cast<sal_uInt16>(pBIH->biBitCount);
+
+                if( pBuffer->mnBitCount <= 8 )
+                {
+                    const sal_uInt16 nPalCount = ImplGetDIBColorCount( mhDIB );
+
+                    pBuffer->maPalette.SetEntryCount( nPalCount );
+                    memcpy( pBuffer->maPalette.ImplGetColorBuffer(), pBI->bmiColors, nPalCount * sizeof( RGBQUAD ) );
+                    pBuffer->mpBits = reinterpret_cast<PBYTE>(pBI) + pBI->bmiHeader.biSize + nPalCount * sizeof( RGBQUAD );
+                }
+                else if( ( pBIH->biBitCount == 16 ) || ( pBIH->biBitCount == 32 ) )
+                {
+                    sal_uLong nOffset = 0;
+
+                    if( pBIH->biCompression == BI_BITFIELDS )
+                    {
+                        nOffset = 3 * sizeof( RGBQUAD );
+                        ColorMaskElement aRedMask(*reinterpret_cast<UINT32*>(&pBI->bmiColors[ 0 ]));
+                        aRedMask.CalcMaskShift();
+                        ColorMaskElement aGreenMask(*reinterpret_cast<UINT32*>(&pBI->bmiColors[ 1 ]));
+                        aGreenMask.CalcMaskShift();
+                        ColorMaskElement aBlueMask(*reinterpret_cast<UINT32*>(&pBI->bmiColors[ 2 ]));
+                        aBlueMask.CalcMaskShift();
+                        pBuffer->maColorMask = ColorMask(aRedMask, aGreenMask, aBlueMask);
+                    }
+                    else if( pBIH->biBitCount == 16 )
+                    {
+                        ColorMaskElement aRedMask(0x00007c00UL);
+                        aRedMask.CalcMaskShift();
+                        ColorMaskElement aGreenMask(0x000003e0UL);
+                        aGreenMask.CalcMaskShift();
+                        ColorMaskElement aBlueMask(0x0000001fUL);
+                        aBlueMask.CalcMaskShift();
+                        pBuffer->maColorMask = ColorMask(aRedMask, aGreenMask, aBlueMask);
+                    }
+                    else
+                    {
+                        ColorMaskElement aRedMask(0x00ff0000UL);
+                        aRedMask.CalcMaskShift();
+                        ColorMaskElement aGreenMask(0x0000ff00UL);
+                        aGreenMask.CalcMaskShift();
+                        ColorMaskElement aBlueMask(0x000000ffUL);
+                        aBlueMask.CalcMaskShift();
+                        pBuffer->maColorMask = ColorMask(aRedMask, aGreenMask, aBlueMask);
+                    }
+
+                    pBuffer->mpBits = reinterpret_cast<PBYTE>(pBI) + pBI->bmiHeader.biSize + nOffset;
+                }
+                else
+                    pBuffer->mpBits = reinterpret_cast<PBYTE>(pBI) + pBI->bmiHeader.biSize;
+            }
+            else
+            {
+                GlobalUnlock( mhDIB );
+                delete pBuffer;
+                pBuffer = nullptr;
+            }
+        }
+        else
+            GlobalUnlock( mhDIB );
+    }
+
+    return pBuffer;
+}
+
+void WinSalBitmap::ReleaseBuffer( BitmapBuffer* pBuffer, BitmapAccessMode nMode )
+{
+    if( pBuffer )
+    {
+        if( mhDIB )
+        {
+            if( nMode == BitmapAccessMode::Write && !!pBuffer->maPalette )
+            {
+                PBITMAPINFO     pBI = static_cast<PBITMAPINFO>(GlobalLock( mhDIB ));
+                const sal_uInt16    nCount = pBuffer->maPalette.GetEntryCount();
+                const sal_uInt16    nDIBColorCount = ImplGetDIBColorCount( mhDIB );
+                memcpy( pBI->bmiColors, pBuffer->maPalette.ImplGetColorBuffer(), std::min( nDIBColorCount, nCount ) * sizeof( RGBQUAD ) );
+                GlobalUnlock( mhDIB );
+            }
+
+            GlobalUnlock( mhDIB );
+        }
+
+        delete pBuffer;
+    }
+    if( nMode == BitmapAccessMode::Write )
+        InvalidateChecksum();
+}
+
+void WinSalBitmap::ImplDecodeRLEBuffer( const BYTE* pSrcBuf, BYTE* pDstBuf,
+                                     const Size& rSizePixel, bool bRLE4 )
+{
+    sal_uInt8 const * pRLE = pSrcBuf;
+    sal_uInt8*      pDIB = pDstBuf;
+    sal_uInt8*      pRow = pDstBuf;
+    sal_uLong       nWidthAl = AlignedWidth4Bytes( rSizePixel.Width() * ( bRLE4 ? 4UL : 8UL ) );
+    sal_uInt8*      pLast = pDIB + rSizePixel.Height() * nWidthAl - 1;
+    sal_uLong       nCountByte;
+    sal_uLong       nRunByte;
+    sal_uLong       i;
+    BYTE            cTmp;
+    bool            bEndDecoding = false;
+
+    if( pRLE && pDIB )
+    {
+        sal_uLong nX = 0;
+        do
+        {
+            if( ( nCountByte = *pRLE++ ) == 0 )
+            {
+                nRunByte = *pRLE++;
+
+                if( nRunByte > 2 )
+                {
+                    if( bRLE4 )
+                    {
+                        nCountByte = nRunByte >> 1;
+
+                        for( i = 0; i < nCountByte; i++ )
+                        {
+                            cTmp = *pRLE++;
+                            ImplSetPixel4( pDIB, nX++, cTmp >> 4 );
+                            ImplSetPixel4( pDIB, nX++, cTmp & 0x0f );
+                        }
+
+                        if( nRunByte & 1 )
+                            ImplSetPixel4( pDIB, nX++, *pRLE++ >> 4 );
+
+                        if( ( ( nRunByte + 1 ) >> 1 ) & 1 )
+                            pRLE++;
+                    }
+                    else
+                    {
+                        memcpy( &pDIB[ nX ], pRLE, nRunByte );
+                        pRLE += nRunByte;
+                        nX += nRunByte;
+
+                        if( nRunByte & 1 )
+                            pRLE++;
+                    }
+                }
+                else if( !nRunByte )
+                {
+                    pDIB = ( pRow += nWidthAl );
+                    nX = 0;
+                }
+                else if( nRunByte == 1 )
+                    bEndDecoding = true;
+                else
+                {
+                    nX += *pRLE++;
+                    pDIB = ( pRow += ( *pRLE++ ) * nWidthAl );
+                }
+            }
+            else
+            {
+                cTmp = *pRLE++;
+
+                if( bRLE4 )
+                {
+                    nRunByte = nCountByte >> 1;
+
+                    for( i = 0; i < nRunByte; i++ )
+                    {
+                        ImplSetPixel4( pDIB, nX++, cTmp >> 4 );
+                        ImplSetPixel4( pDIB, nX++, cTmp & 0x0f );
+                    }
+
+                    if( nCountByte & 1 )
+                        ImplSetPixel4( pDIB, nX++, cTmp >> 4 );
+                }
+                else
+                {
+                    for( i = 0; i < nCountByte; i++ )
+                        pDIB[ nX++ ] = cTmp;
+                }
+            }
+        }
+        while( !bEndDecoding && ( pDIB <= pLast ) );
+    }
+}
+
+bool WinSalBitmap::GetSystemData( BitmapSystemData& rData )
+{
+    bool bRet = false;
+    if( mhDIB || mhDDB )
+    {
+        bRet = true;
+        rData.pDIB = mhDIB;
+        const Size& rSize = GetSize ();
+        rData.mnWidth = rSize.Width();
+        rData.mnHeight = rSize.Height();
+    }
+    return bRet;
+}
+
+bool WinSalBitmap::ScalingSupported() const
+{
+    return false;
+}
+
+bool WinSalBitmap::Scale( const double& /*rScaleX*/, const double& /*rScaleY*/, BmpScaleFlag /*nScaleFlag*/ )
+{
+    return false;
+}
+
+bool WinSalBitmap::Replace( const Color& /*rSearchColor*/, const Color& /*rReplaceColor*/, sal_uInt8 /*nTol*/ )
+{
+    return false;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */