vcl/Library_vcl.mk                                 |    2 
 vcl/inc/BitmapFastScaleFilter.hxx                  |   41 +++
 vcl/inc/BitmapInterpolateScaleFilter.hxx           |   41 +++
 vcl/source/bitmap/BitmapFastScaleFilter.cxx        |  130 ++++++++++
 vcl/source/bitmap/BitmapInterpolateScaleFilter.cxx |  236 ++++++++++++++++++
 vcl/source/gdi/bitmap3.cxx                         |  265 ---------------------
 vcl/source/gdi/bitmapex.cxx                        |    7 
 7 files changed, 460 insertions(+), 262 deletions(-)

New commits:
commit d246aa574571409046619254292698184c2545a3
Author: Chris Sherlock <chris.sherloc...@gmail.com>
Date:   Sun Apr 15 10:14:10 2018 +1000

    vcl: move Bitmap::ImplScaleFast() and Bitmap::ImplScaleInterpolate()
    
    Bitmap::ImplScaleFast() -> BitmapFastScaleFilter
    Bitmap::ImplScaleInterpolate() -> BitmapInterpolateScaleFilter
    
    Change-Id: Ieb39cc21df5d98563945968cec81b7c51f64177f
    Reviewed-on: https://gerrit.libreoffice.org/52899
    Tested-by: Jenkins <c...@libreoffice.org>
    Reviewed-by: Toma┼ż Vajngerl <qui...@gmail.com>

diff --git a/vcl/Library_vcl.mk b/vcl/Library_vcl.mk
index 3a819cefab26..93d1faf1826e 100644
--- a/vcl/Library_vcl.mk
+++ b/vcl/Library_vcl.mk
@@ -313,10 +313,12 @@ $(eval $(call gb_Library_add_exception_objects,vcl,\
     vcl/source/graphic/UnoGraphicTransformer \
     vcl/source/bitmap/bitmap \
     vcl/source/bitmap/bitmapfilter \
+    vcl/source/bitmap/BitmapInterpolateScaleFilter \
     vcl/source/bitmap/BitmapLightenFilter \
     vcl/source/bitmap/BitmapDisabledImageFilter \
     vcl/source/bitmap/BitmapColorizeFilter \
     vcl/source/bitmap/bitmappaint \
+       vcl/source/bitmap/BitmapFastScaleFilter \
     vcl/source/bitmap/BitmapScaleSuperFilter \
     vcl/source/bitmap/BitmapScaleConvolutionFilter \
     vcl/source/bitmap/BitmapSymmetryCheck \
diff --git a/vcl/inc/BitmapFastScaleFilter.hxx 
b/vcl/inc/BitmapFastScaleFilter.hxx
new file mode 100644
index 000000000000..c1ee11bf1a84
--- /dev/null
+++ b/vcl/inc/BitmapFastScaleFilter.hxx
@@ -0,0 +1,41 @@
+/* -*- 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/.
+ *
+ */
+
+#ifndef VCL_INC_BITMAPFASTSCALEFILTER_HXX
+#define VCL_INC_BITMAPFASTSCALEFILTER_HXX
+
+#include <vcl/bitmapex.hxx>
+#include <vcl/BitmapFilter.hxx>
+
+class VCL_DLLPUBLIC BitmapFastScaleFilter : public BitmapFilter
+{
+public:
+    explicit BitmapFastScaleFilter(double fScaleX, double fScaleY)
+        : mfScaleX(fScaleX)
+        , mfScaleY(fScaleY)
+    {
+    }
+
+    explicit BitmapFastScaleFilter(Size aSize)
+        : maSize(aSize)
+    {
+    }
+
+    virtual BitmapEx execute(BitmapEx const& rBitmapEx) override;
+
+private:
+    double mfScaleX;
+    double mfScaleY;
+    Size maSize;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/BitmapInterpolateScaleFilter.hxx 
b/vcl/inc/BitmapInterpolateScaleFilter.hxx
new file mode 100644
index 000000000000..0fbe9ac3f4a8
--- /dev/null
+++ b/vcl/inc/BitmapInterpolateScaleFilter.hxx
@@ -0,0 +1,41 @@
+/* -*- 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/.
+ *
+ */
+
+#ifndef VCL_INC_BITMAPINTERPOLATESCALEFILTER_HXX
+#define VCL_INC_BITMAPINTERPOLATESCALEFILTER_HXX
+
+#include <vcl/bitmapex.hxx>
+#include <vcl/BitmapFilter.hxx>
+
+class VCL_DLLPUBLIC BitmapInterpolateScaleFilter : public BitmapFilter
+{
+public:
+    explicit BitmapInterpolateScaleFilter(double fScaleX, double fScaleY)
+        : mfScaleX(fScaleX)
+        , mfScaleY(fScaleY)
+    {
+    }
+
+    explicit BitmapInterpolateScaleFilter(Size aSize)
+        : maSize(aSize)
+    {
+    }
+
+    virtual BitmapEx execute(BitmapEx const& rBitmapEx) override;
+
+private:
+    double mfScaleX;
+    double mfScaleY;
+    Size maSize;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/source/bitmap/BitmapFastScaleFilter.cxx 
b/vcl/source/bitmap/BitmapFastScaleFilter.cxx
new file mode 100644
index 000000000000..6bf1700a476f
--- /dev/null
+++ b/vcl/source/bitmap/BitmapFastScaleFilter.cxx
@@ -0,0 +1,130 @@
+/* -*- 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/helpers.hxx>
+
+#include <vcl/bitmapex.hxx>
+#include <vcl/bitmapaccess.hxx>
+
+#include <bitmapwriteaccess.hxx>
+#include <BitmapFastScaleFilter.hxx>
+
+BitmapEx BitmapFastScaleFilter::execute(BitmapEx const& rBitmapEx)
+{
+    SAL_INFO("vcl.gdi", "BitmapFastScaleFilter::execute()");
+
+    Bitmap aBitmap(rBitmapEx.GetBitmap());
+
+    const Size aSizePix(aBitmap.GetSizePixel());
+    const long nNewWidth = FRound(aSizePix.Width() * mfScaleX);
+    const long nNewHeight = FRound(aSizePix.Height() * mfScaleY);
+    bool bRet = false;
+
+    SAL_INFO("vcl.gdi", "New width: " << nNewWidth << "\nNew height: " << 
nNewHeight);
+
+    if (nNewWidth && nNewHeight)
+    {
+        Bitmap::ScopedReadAccess pReadAcc(aBitmap);
+
+        if (pReadAcc)
+        {
+            Bitmap aNewBmp(Size(nNewWidth, nNewHeight), aBitmap.GetBitCount(),
+                           &pReadAcc->GetPalette());
+            BitmapScopedWriteAccess pWriteAcc(aNewBmp);
+
+            if (pWriteAcc)
+            {
+                const long nScanlineSize = pWriteAcc->GetScanlineSize();
+                const long nNewWidth1 = nNewWidth - 1;
+                const long nNewHeight1 = nNewHeight - 1;
+
+                if (nNewWidth1 && nNewHeight1)
+                {
+                    const double nWidth = pReadAcc->Width();
+                    const double nHeight = pReadAcc->Height();
+                    std::unique_ptr<long[]> pLutX(new long[nNewWidth]);
+                    std::unique_ptr<long[]> pLutY(new long[nNewHeight]);
+
+                    for (long nX = 0; nX < nNewWidth; nX++)
+                    {
+                        pLutX[nX] = long(nX * nWidth / nNewWidth);
+                    }
+
+                    for (long nY = 0; nY < nNewHeight; nY++)
+                    {
+                        pLutY[nY] = long(nY * nHeight / nNewHeight);
+                    }
+
+                    long nActY = 0;
+                    while (nActY < nNewHeight)
+                    {
+                        long nMapY = pLutY[nActY];
+                        Scanline pScanline = pWriteAcc->GetScanline(nActY);
+                        Scanline pScanlineRead = pReadAcc->GetScanline(nMapY);
+
+                        for (long nX = 0; nX < nNewWidth; nX++)
+                        {
+                            pWriteAcc->SetPixelOnData(
+                                pScanline, nX,
+                                pReadAcc->GetPixelFromData(pScanlineRead, 
pLutX[nX]));
+                        }
+
+                        while ((nActY < nNewHeight1) && (pLutY[nActY + 1] == 
nMapY))
+                        {
+                            memcpy(pWriteAcc->GetScanline(nActY + 1), 
pWriteAcc->GetScanline(nActY),
+                                   nScanlineSize);
+                            nActY++;
+                        }
+                        nActY++;
+                    }
+
+                    bRet = true;
+                }
+
+                pWriteAcc.reset();
+            }
+            pReadAcc.reset();
+
+            if (bRet)
+            {
+                aBitmap.ReassignWithSize(aNewBmp);
+                SAL_INFO("vcl.gdi", "Bitmap size: " << aBitmap.GetSizePixel());
+            }
+            else
+            {
+                SAL_WARN("vcl.gdi", "no resize");
+            }
+        }
+    }
+
+    Bitmap aMask(rBitmapEx.GetMask());
+
+    if (bRet && (rBitmapEx.GetTransparentType() == TransparentType::Bitmap) && 
!aMask.IsEmpty())
+        bRet = aMask.Scale(maSize, BmpScaleFlag::Fast);
+
+    SAL_WARN_IF(!aMask.IsEmpty() && aBitmap.GetSizePixel() != 
aMask.GetSizePixel(), "vcl",
+                "BitmapEx::Scale(): size mismatch for bitmap and alpha mask.");
+
+    if (bRet)
+        return BitmapEx(aBitmap, aMask);
+
+    return BitmapEx();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/source/bitmap/BitmapInterpolateScaleFilter.cxx 
b/vcl/source/bitmap/BitmapInterpolateScaleFilter.cxx
new file mode 100644
index 000000000000..43e4d2ff0f24
--- /dev/null
+++ b/vcl/source/bitmap/BitmapInterpolateScaleFilter.cxx
@@ -0,0 +1,236 @@
+/* -*- 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/helpers.hxx>
+
+#include <vcl/bitmapex.hxx>
+#include <vcl/bitmapaccess.hxx>
+
+#include <bitmapwriteaccess.hxx>
+#include <BitmapFastScaleFilter.hxx>
+#include <BitmapInterpolateScaleFilter.hxx>
+
+BitmapEx BitmapInterpolateScaleFilter::execute(BitmapEx const& rBitmapEx)
+{
+    Bitmap aBitmap(rBitmapEx.GetBitmap());
+
+    const Size aSizePix(aBitmap.GetSizePixel());
+    const long nNewWidth = FRound(aSizePix.Width() * mfScaleX);
+    const long nNewHeight = FRound(aSizePix.Height() * mfScaleY);
+    bool bRet = false;
+
+    if ((nNewWidth > 1) && (nNewHeight > 1))
+    {
+        Bitmap::ScopedReadAccess pReadAcc(aBitmap);
+        if (pReadAcc)
+        {
+            long nWidth = pReadAcc->Width();
+            long nHeight = pReadAcc->Height();
+            Bitmap aNewBmp(Size(nNewWidth, nHeight), 24);
+            BitmapScopedWriteAccess pWriteAcc(aNewBmp);
+
+            if (pWriteAcc)
+            {
+                const long nNewWidth1 = nNewWidth - 1;
+                const long nWidth1 = pReadAcc->Width() - 1;
+                const double fRevScaleX = static_cast<double>(nWidth1) / 
nNewWidth1;
+
+                std::unique_ptr<long[]> pLutInt(new long[nNewWidth]);
+                std::unique_ptr<long[]> pLutFrac(new long[nNewWidth]);
+
+                for (long nX = 0, nTemp = nWidth - 2; nX < nNewWidth; nX++)
+                {
+                    double fTemp = nX * fRevScaleX;
+                    pLutInt[nX] = MinMax(static_cast<long>(fTemp), 0, nTemp);
+                    fTemp -= pLutInt[nX];
+                    pLutFrac[nX] = static_cast<long>(fTemp * 1024.);
+                }
+
+                for (long nY = 0; nY < nHeight; nY++)
+                {
+                    Scanline pScanlineRead = pReadAcc->GetScanline(nY);
+                    if (1 == nWidth)
+                    {
+                        BitmapColor aCol0;
+                        if (pReadAcc->HasPalette())
+                        {
+                            aCol0 = pReadAcc->GetPaletteColor(
+                                pReadAcc->GetIndexFromData(pScanlineRead, 0));
+                        }
+                        else
+                        {
+                            aCol0 = pReadAcc->GetPixelFromData(pScanlineRead, 
0);
+                        }
+
+                        Scanline pScanline = pWriteAcc->GetScanline(nY);
+                        for (long nX = 0; nX < nNewWidth; nX++)
+                        {
+                            pWriteAcc->SetPixelOnData(pScanline, nX, aCol0);
+                        }
+                    }
+                    else
+                    {
+                        Scanline pScanline = pWriteAcc->GetScanline(nY);
+                        for (long nX = 0; nX < nNewWidth; nX++)
+                        {
+                            long nTemp = pLutInt[nX];
+
+                            BitmapColor aCol0, aCol1;
+                            if (pReadAcc->HasPalette())
+                            {
+                                aCol0 = pReadAcc->GetPaletteColor(
+                                    pReadAcc->GetIndexFromData(pScanlineRead, 
nTemp++));
+                                aCol1 = pReadAcc->GetPaletteColor(
+                                    pReadAcc->GetIndexFromData(pScanlineRead, 
nTemp));
+                            }
+                            else
+                            {
+                                aCol0 = 
pReadAcc->GetPixelFromData(pScanlineRead, nTemp++);
+                                aCol1 = 
pReadAcc->GetPixelFromData(pScanlineRead, nTemp);
+                            }
+
+                            nTemp = pLutFrac[nX];
+
+                            long lXR0 = aCol0.GetRed();
+                            long lXG0 = aCol0.GetGreen();
+                            long lXB0 = aCol0.GetBlue();
+                            long lXR1 = aCol1.GetRed() - lXR0;
+                            long lXG1 = aCol1.GetGreen() - lXG0;
+                            long lXB1 = aCol1.GetBlue() - lXB0;
+
+                            aCol0.SetRed(
+                                static_cast<sal_uInt8>((lXR1 * nTemp + (lXR0 
<< 10)) >> 10));
+                            aCol0.SetGreen(
+                                static_cast<sal_uInt8>((lXG1 * nTemp + (lXG0 
<< 10)) >> 10));
+                            aCol0.SetBlue(
+                                static_cast<sal_uInt8>((lXB1 * nTemp + (lXB0 
<< 10)) >> 10));
+
+                            pWriteAcc->SetPixelOnData(pScanline, nX, aCol0);
+                        }
+                    }
+                }
+
+                bRet = true;
+            }
+
+            pReadAcc.reset();
+            pWriteAcc.reset();
+
+            if (bRet)
+            {
+                bRet = false;
+                const Bitmap aOriginal(aBitmap);
+                aBitmap = aNewBmp;
+                aNewBmp = Bitmap(Size(nNewWidth, nNewHeight), 24);
+                pReadAcc = Bitmap::ScopedReadAccess(aBitmap);
+                pWriteAcc = BitmapScopedWriteAccess(aNewBmp);
+
+                if (pReadAcc && pWriteAcc)
+                {
+                    const long nNewHeight1 = nNewHeight - 1;
+                    const long nHeight1 = pReadAcc->Height() - 1;
+                    const double fRevScaleY = static_cast<double>(nHeight1) / 
nNewHeight1;
+
+                    std::unique_ptr<long[]> pLutInt(new long[nNewHeight]);
+                    std::unique_ptr<long[]> pLutFrac(new long[nNewHeight]);
+
+                    for (long nY = 0, nTemp = nHeight - 2; nY < nNewHeight; 
nY++)
+                    {
+                        double fTemp = nY * fRevScaleY;
+                        pLutInt[nY] = MinMax(static_cast<long>(fTemp), 0, 
nTemp);
+                        fTemp -= pLutInt[nY];
+                        pLutFrac[nY] = static_cast<long>(fTemp * 1024.);
+                    }
+
+                    // after 1st step, bitmap *is* 24bit format (see above)
+                    OSL_ENSURE(!pReadAcc->HasPalette(), "OOps, somehow 
ImplScaleInterpolate "
+                                                        "in-between format has 
palette, should not "
+                                                        "happen (!)");
+
+                    for (long nX = 0; nX < nNewWidth; nX++)
+                    {
+                        if (1 == nHeight)
+                        {
+                            BitmapColor aCol0 = pReadAcc->GetPixel(0, nX);
+
+                            for (long nY = 0; nY < nNewHeight; nY++)
+                            {
+                                pWriteAcc->SetPixel(nY, nX, aCol0);
+                            }
+                        }
+                        else
+                        {
+                            for (long nY = 0; nY < nNewHeight; nY++)
+                            {
+                                long nTemp = pLutInt[nY];
+
+                                BitmapColor aCol0 = 
pReadAcc->GetPixel(nTemp++, nX);
+                                BitmapColor aCol1 = pReadAcc->GetPixel(nTemp, 
nX);
+
+                                nTemp = pLutFrac[nY];
+
+                                long lXR0 = aCol0.GetRed();
+                                long lXG0 = aCol0.GetGreen();
+                                long lXB0 = aCol0.GetBlue();
+                                long lXR1 = aCol1.GetRed() - lXR0;
+                                long lXG1 = aCol1.GetGreen() - lXG0;
+                                long lXB1 = aCol1.GetBlue() - lXB0;
+
+                                aCol0.SetRed(
+                                    static_cast<sal_uInt8>((lXR1 * nTemp + 
(lXR0 << 10)) >> 10));
+                                aCol0.SetGreen(
+                                    static_cast<sal_uInt8>((lXG1 * nTemp + 
(lXG0 << 10)) >> 10));
+                                aCol0.SetBlue(
+                                    static_cast<sal_uInt8>((lXB1 * nTemp + 
(lXB0 << 10)) >> 10));
+
+                                pWriteAcc->SetPixel(nY, nX, aCol0);
+                            }
+                        }
+                    }
+
+                    bRet = true;
+                }
+
+                pReadAcc.reset();
+                pWriteAcc.reset();
+
+                if (bRet)
+                {
+                    aOriginal.AdaptBitCount(aNewBmp);
+                    aBitmap = aNewBmp;
+                }
+            }
+        }
+    }
+
+    if (!bRet)
+    {
+        // fallback to fast scale filter
+        BitmapEx aBmpEx(aBitmap);
+        bRet = BitmapFilter::Filter(aBmpEx, BitmapFastScaleFilter(mfScaleX, 
mfScaleY));
+        aBitmap = aBmpEx.GetBitmap();
+    }
+
+    if (bRet)
+        return BitmapEx(aBitmap);
+
+    return BitmapEx();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/source/gdi/bitmap3.cxx b/vcl/source/gdi/bitmap3.cxx
index b933e41ba2f1..b42731e3696a 100755
--- a/vcl/source/gdi/bitmap3.cxx
+++ b/vcl/source/gdi/bitmap3.cxx
@@ -32,6 +32,8 @@
 #include <impoctree.hxx>
 #include <BitmapScaleSuperFilter.hxx>
 #include <BitmapScaleConvolutionFilter.hxx>
+#include <BitmapFastScaleFilter.hxx>
+#include <BitmapInterpolateScaleFilter.hxx>
 #include <bitmapwriteaccess.hxx>
 #include <octree.hxx>
 
@@ -761,16 +763,16 @@ bool Bitmap::Scale( const double& rScaleX, const double& 
rScaleY, BmpScaleFlag n
     switch(nScaleFlag)
     {
         case BmpScaleFlag::Fast:
-            bRetval = ImplScaleFast( rScaleX, rScaleY );
+            bRetval = BitmapFilter::Filter(aBmpEx, 
BitmapFastScaleFilter(rScaleX, rScaleY));
             break;
 
         case BmpScaleFlag::Interpolate:
-            bRetval = ImplScaleInterpolate(rScaleX, rScaleY);
+            bRetval = BitmapFilter::Filter(aBmpEx, 
BitmapInterpolateScaleFilter(rScaleX, rScaleY));
             break;
 
         case BmpScaleFlag::Default:
             if (GetSizePixel().Width() < 2 || GetSizePixel().Height() < 2)
-                bRetval = ImplScaleFast(rScaleX, rScaleY);
+                bRetval = BitmapFilter::Filter(aBmpEx, 
BitmapFastScaleFilter(rScaleX, rScaleY));
             else
                 bRetval = BitmapFilter::Filter(aBmpEx, 
BitmapScaleSuperFilter(rScaleX, rScaleY));
             break;
@@ -789,7 +791,7 @@ bool Bitmap::Scale( const double& rScaleX, const double& 
rScaleY, BmpScaleFlag n
             break;
     }
 
-    if (bRetval && nScaleFlag != BmpScaleFlag::Fast && nScaleFlag != 
BmpScaleFlag::Interpolate)
+    if (bRetval)
         *this = aBmpEx.GetBitmapRef();
 
     OSL_ENSURE(!bRetval || nStartCount == GetBitCount(), "Bitmap::Scale has 
changed the ColorDepth, this should *not* happen (!)");
@@ -872,261 +874,6 @@ void Bitmap::AdaptBitCount(Bitmap& rNew) const
     }
 }
 
-bool Bitmap::ImplScaleFast( const double& rScaleX, const double& rScaleY )
-{
-    const Size aSizePix( GetSizePixel() );
-    const long nNewWidth = FRound( aSizePix.Width() * rScaleX );
-    const long nNewHeight = FRound( aSizePix.Height() * rScaleY );
-    bool bRet = false;
-
-    if( nNewWidth && nNewHeight )
-    {
-        ScopedReadAccess pReadAcc(*this);
-
-        if(pReadAcc)
-        {
-            Bitmap aNewBmp( Size( nNewWidth, nNewHeight ), GetBitCount(), 
&pReadAcc->GetPalette() );
-            BitmapScopedWriteAccess pWriteAcc(aNewBmp);
-
-            if( pWriteAcc )
-            {
-                const long nScanlineSize = pWriteAcc->GetScanlineSize();
-                const long nNewWidth1 = nNewWidth - 1;
-                const long nNewHeight1 = nNewHeight - 1;
-
-                if( nNewWidth1 && nNewHeight1 )
-                {
-                    const double nWidth = pReadAcc->Width();
-                    const double nHeight = pReadAcc->Height();
-                    std::unique_ptr<long[]> pLutX(new long[ nNewWidth ]);
-                    std::unique_ptr<long[]> pLutY(new long[ nNewHeight ]);
-
-                    for( long nX = 0; nX < nNewWidth; nX++ )
-                        pLutX[ nX ] = long(nX * nWidth / nNewWidth);
-
-                    for( long nY = 0; nY < nNewHeight; nY++ )
-                        pLutY[ nY ] = long(nY * nHeight / nNewHeight);
-
-                    long nActY = 0;
-                    while( nActY < nNewHeight )
-                    {
-                        long nMapY = pLutY[ nActY ];
-                        Scanline pScanline = pWriteAcc->GetScanline(nActY);
-                        Scanline pScanlineRead = pReadAcc->GetScanline(nMapY);
-
-                        for( long nX = 0; nX < nNewWidth; nX++ )
-                            pWriteAcc->SetPixelOnData( pScanline, nX, 
pReadAcc->GetPixelFromData( pScanlineRead , pLutX[ nX ] ) );
-
-                        while( ( nActY < nNewHeight1 ) && ( pLutY[ nActY + 1 ] 
== nMapY ) )
-                        {
-                            memcpy( pWriteAcc->GetScanline( nActY + 1 ),
-                                    pWriteAcc->GetScanline( nActY ), 
nScanlineSize );
-                            nActY++;
-                        }
-                        nActY++;
-                    }
-
-                    bRet = true;
-                }
-
-                pWriteAcc.reset();
-            }
-            pReadAcc.reset();
-
-            if (bRet)
-                ReassignWithSize(aNewBmp);
-        }
-    }
-
-    return bRet;
-}
-
-bool Bitmap::ImplScaleInterpolate( const double& rScaleX, const double& 
rScaleY )
-{
-    const Size aSizePix( GetSizePixel() );
-    const long nNewWidth = FRound( aSizePix.Width() * rScaleX );
-    const long nNewHeight = FRound( aSizePix.Height() * rScaleY );
-    bool bRet = false;
-
-    if( ( nNewWidth > 1 ) && ( nNewHeight > 1 ) )
-    {
-        ScopedReadAccess pReadAcc(*this);
-        if( pReadAcc )
-        {
-            long nWidth = pReadAcc->Width();
-            long nHeight = pReadAcc->Height();
-            Bitmap aNewBmp( Size( nNewWidth, nHeight ), 24 );
-            BitmapScopedWriteAccess pWriteAcc(aNewBmp);
-
-            if( pWriteAcc )
-            {
-                const long nNewWidth1 = nNewWidth - 1;
-                const long nWidth1 = pReadAcc->Width() - 1;
-                const double fRevScaleX = static_cast<double>(nWidth1) / 
nNewWidth1;
-
-                std::unique_ptr<long[]> pLutInt(new long[ nNewWidth ]);
-                std::unique_ptr<long[]> pLutFrac(new long[ nNewWidth ]);
-
-                for( long nX = 0, nTemp = nWidth - 2; nX < nNewWidth; nX++ )
-                {
-                    double fTemp = nX * fRevScaleX;
-                    pLutInt[ nX ] = MinMax( static_cast<long>(fTemp), 0, nTemp 
);
-                    fTemp -= pLutInt[ nX ];
-                    pLutFrac[ nX ] = static_cast<long>( fTemp * 1024. );
-                }
-
-                for( long nY = 0; nY < nHeight; nY++ )
-                {
-                    Scanline pScanlineRead = pReadAcc->GetScanline(nY);
-                    if( 1 == nWidth )
-                    {
-                        BitmapColor aCol0;
-                        if( pReadAcc->HasPalette() )
-                        {
-                            aCol0 = pReadAcc->GetPaletteColor( 
pReadAcc->GetIndexFromData( pScanlineRead, 0 ) );
-                        }
-                        else
-                        {
-                            aCol0 = pReadAcc->GetPixelFromData( pScanlineRead, 
0 );
-                        }
-
-                        Scanline pScanline = pWriteAcc->GetScanline(nY);
-                        for( long nX = 0; nX < nNewWidth; nX++ )
-                        {
-                            pWriteAcc->SetPixelOnData( pScanline, nX, aCol0 );
-                        }
-                    }
-                    else
-                    {
-                        Scanline pScanline = pWriteAcc->GetScanline(nY);
-                        for( long nX = 0; nX < nNewWidth; nX++ )
-                        {
-                            long nTemp = pLutInt[ nX ];
-
-                            BitmapColor aCol0, aCol1;
-                            if( pReadAcc->HasPalette() )
-                            {
-                                aCol0 = pReadAcc->GetPaletteColor( 
pReadAcc->GetIndexFromData( pScanlineRead, nTemp++ ) );
-                                aCol1 = pReadAcc->GetPaletteColor( 
pReadAcc->GetIndexFromData( pScanlineRead, nTemp ) );
-                            }
-                            else
-                            {
-                                aCol0 = pReadAcc->GetPixelFromData( 
pScanlineRead, nTemp++ );
-                                aCol1 = pReadAcc->GetPixelFromData( 
pScanlineRead, nTemp );
-                            }
-
-                            nTemp = pLutFrac[ nX ];
-
-                            long lXR0 = aCol0.GetRed();
-                            long lXG0 = aCol0.GetGreen();
-                            long lXB0 = aCol0.GetBlue();
-                            long lXR1 = aCol1.GetRed() - lXR0;
-                            long lXG1 = aCol1.GetGreen() - lXG0;
-                            long lXB1 = aCol1.GetBlue() - lXB0;
-
-                            aCol0.SetRed( static_cast<sal_uInt8>( ( lXR1 * 
nTemp + ( lXR0 << 10 ) ) >> 10 ) );
-                            aCol0.SetGreen( static_cast<sal_uInt8>( ( lXG1 * 
nTemp + ( lXG0 << 10 ) ) >> 10 ) );
-                            aCol0.SetBlue( static_cast<sal_uInt8>( ( lXB1 * 
nTemp + ( lXB0 << 10 ) ) >> 10 ) );
-
-                            pWriteAcc->SetPixelOnData( pScanline, nX, aCol0 );
-                        }
-                    }
-                }
-
-                bRet = true;
-            }
-
-            pReadAcc.reset();
-            pWriteAcc.reset();
-
-            if( bRet )
-            {
-                bRet = false;
-                const Bitmap aOriginal(*this);
-                *this = aNewBmp;
-                aNewBmp = Bitmap( Size( nNewWidth, nNewHeight ), 24 );
-                pReadAcc = ScopedReadAccess(*this);
-                pWriteAcc = BitmapScopedWriteAccess(aNewBmp);
-
-                if( pReadAcc && pWriteAcc )
-                {
-                    const long nNewHeight1 = nNewHeight - 1;
-                    const long nHeight1 = pReadAcc->Height() - 1;
-                    const double fRevScaleY = static_cast<double>(nHeight1) / 
nNewHeight1;
-
-                    std::unique_ptr<long[]> pLutInt(new long[ nNewHeight ]);
-                    std::unique_ptr<long[]> pLutFrac(new long[ nNewHeight ]);
-
-                    for( long nY = 0, nTemp = nHeight - 2; nY < nNewHeight; 
nY++ )
-                    {
-                        double fTemp = nY * fRevScaleY;
-                        pLutInt[ nY ] = MinMax( static_cast<long>(fTemp), 0, 
nTemp );
-                        fTemp -= pLutInt[ nY ];
-                        pLutFrac[ nY ] = static_cast<long>( fTemp * 1024. );
-                    }
-
-                    // after 1st step, bitmap *is* 24bit format (see above)
-                    OSL_ENSURE(!pReadAcc->HasPalette(), "OOps, somehow 
ImplScaleInterpolate in-between format has palette, should not happen (!)");
-
-                    for( long nX = 0; nX < nNewWidth; nX++ )
-                    {
-                        if( 1 == nHeight )
-                        {
-                            BitmapColor aCol0 = pReadAcc->GetPixel( 0, nX );
-
-                            for( long nY = 0; nY < nNewHeight; nY++ )
-                            {
-                                pWriteAcc->SetPixel( nY, nX, aCol0 );
-                            }
-                        }
-                        else
-                        {
-                            for( long nY = 0; nY < nNewHeight; nY++ )
-                            {
-                                long nTemp = pLutInt[ nY ];
-
-                                BitmapColor aCol0 = pReadAcc->GetPixel( 
nTemp++, nX );
-                                BitmapColor aCol1 = pReadAcc->GetPixel( nTemp, 
nX );
-
-                                nTemp = pLutFrac[ nY ];
-
-                                long lXR0 = aCol0.GetRed();
-                                long lXG0 = aCol0.GetGreen();
-                                long lXB0 = aCol0.GetBlue();
-                                long lXR1 = aCol1.GetRed() - lXR0;
-                                long lXG1 = aCol1.GetGreen() - lXG0;
-                                long lXB1 = aCol1.GetBlue() - lXB0;
-
-                                aCol0.SetRed( static_cast<sal_uInt8>( ( lXR1 * 
nTemp + ( lXR0 << 10 ) ) >> 10 ) );
-                                aCol0.SetGreen( static_cast<sal_uInt8>( ( lXG1 
* nTemp + ( lXG0 << 10 ) ) >> 10 ) );
-                                aCol0.SetBlue( static_cast<sal_uInt8>( ( lXB1 
* nTemp + ( lXB0 << 10 ) ) >> 10 ) );
-
-                                pWriteAcc->SetPixel( nY, nX, aCol0 );
-                            }
-                        }
-                    }
-
-                    bRet = true;
-                }
-
-                pReadAcc.reset();
-                pWriteAcc.reset();
-
-                if( bRet )
-                {
-                    aOriginal.AdaptBitCount(aNewBmp);
-                    *this = aNewBmp;
-                }
-            }
-        }
-    }
-
-    if (!bRet)
-        bRet = ImplScaleFast(rScaleX, rScaleY);
-
-    return bRet;
-}
-
 bool Bitmap::Dither( BmpDitherFlags nDitherFlags )
 {
     bool bRet = false;
diff --git a/vcl/source/gdi/bitmapex.cxx b/vcl/source/gdi/bitmapex.cxx
old mode 100644
new mode 100755
index d107c55631f0..5b03870578cd
--- a/vcl/source/gdi/bitmapex.cxx
+++ b/vcl/source/gdi/bitmapex.cxx
@@ -19,11 +19,10 @@
 
 #include <rtl/crc.h>
 #include <rtl/strbuf.hxx>
-#include <o3tl/any.hxx>
 #include <tools/debug.hxx>
-#include <unotools/resmgr.hxx>
 #include <tools/stream.hxx>
 #include <basegfx/matrix/b2dhommatrixtools.hxx>
+#include <unotools/resmgr.hxx>
 
 #include <vcl/ImageTree.hxx>
 #include <vcl/salbtype.hxx>
@@ -40,9 +39,12 @@
 #include <salbmp.hxx>
 #include <salinst.hxx>
 #include <svdata.hxx>
+#include <BitmapFastScaleFilter.hxx>
 #include <bitmapwriteaccess.hxx>
 #include <image.h>
 
+#include <o3tl/any.hxx>
+
 #include <com/sun/star/beans/XFastPropertySet.hpp>
 
 #include <memory>
@@ -119,7 +121,6 @@ BitmapEx::BitmapEx( const Bitmap& rBmp, const Bitmap& rMask 
) :
         meTransparent    ( !rMask ? TransparentType::NONE : 
TransparentType::Bitmap ),
         mbAlpha          ( false )
 {
-    SAL_INFO("vcl.gdi", "Bitmap size: " << maBitmapSize);
     // Ensure a mask is exactly one bit deep
     if( !!maMask && maMask.GetBitCount() != 1 )
     {
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