diff --git a/libs/image/kis_painter.cc b/libs/image/kis_painter.cc
index 744f4320ca..1a0c304bb7 100644
--- a/libs/image/kis_painter.cc
+++ b/libs/image/kis_painter.cc
@@ -1,2888 +1,2911 @@
 /*
  *  Copyright (c) 2002 Patrick Julien <freak@codepimps.org>
  *  Copyright (c) 2004 Boudewijn Rempt <boud@valdyas.org>
  *  Copyright (c) 2004 Clarence Dang <dang@kde.org>
  *  Copyright (c) 2004 Adrian Page <adrian@pagenet.plus.com>
  *  Copyright (c) 2004 Cyrille Berger <cberger@cberger.net>
  *  Copyright (c) 2008-2010 Lukáš Tvrdý <lukast.dev@gmail.com>
  *  Copyright (c) 2010 José Luis Vergara Toloza <pentalis@gmail.com>
  *  Copyright (c) 2011 Silvio Heinrich <plassy@web.de>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
 #include "kis_painter.h"
 #include <stdlib.h>
 #include <string.h>
 #include <cfloat>
 #include <cmath>
 #include <climits>
 #ifndef Q_OS_WIN
 #include <strings.h>
 #endif
 
 #include <QImage>
 #include <QRect>
 #include <QString>
 #include <QStringList>
 #include <kundo2command.h>
 
 #include <kis_debug.h>
 #include <klocalizedstring.h>
 
 #include <KoColorSpace.h>
 #include <KoColor.h>
 #include <KoCompositeOpRegistry.h>
 
 #include "kis_image.h"
 #include "filter/kis_filter.h"
 #include "kis_layer.h"
 #include "kis_paint_device.h"
 #include "kis_fixed_paint_device.h"
 #include "kis_transaction.h"
 #include "kis_vec.h"
 #include "kis_iterator_ng.h"
 #include "kis_random_accessor_ng.h"
 #include "kis_paintop.h"
 #include "kis_selection.h"
 #include "kis_fill_painter.h"
 #include "filter/kis_filter_configuration.h"
 #include "kis_pixel_selection.h"
 #include <brushengine/kis_paint_information.h>
 #include "kis_paintop_registry.h"
 #include "kis_perspective_math.h"
 #include "tiles3/kis_random_accessor.h"
 #include <kis_distance_information.h>
 #include <KoColorSpaceMaths.h>
 #include "kis_lod_transform.h"
 
 
 
 // Maximum distance from a Bezier control point to the line through the start
 // and end points for the curve to be considered flat.
 #define BEZIER_FLATNESS_THRESHOLD 0.5
 #define trunc(x) ((int)(x))
 #ifndef Q_OS_WIN
 
 #endif
 
 struct Q_DECL_HIDDEN KisPainter::Private {
     Private(KisPainter *_q) : q(_q) {}
     Private(KisPainter *_q, const KoColorSpace *cs)
         : q(_q), paintColor(cs), backgroundColor(cs) {}
 
     KisPainter *q;
 
     KisPaintDeviceSP            device;
     KisSelectionSP              selection;
     KisTransaction*             transaction;
     KoUpdater*                  progressUpdater;
 
     QVector<QRect>              dirtyRects;
     KisPaintOp*                 paintOp;
     KoColor                     paintColor;
     KoColor                     backgroundColor;
     KoColor                     customColor;
     KisFilterConfigurationSP    generator;
     KisPaintLayer*              sourceLayer;
     FillStyle                   fillStyle;
     StrokeStyle                 strokeStyle;
     bool                        antiAliasPolygonFill;
     const KoPattern*           pattern;
     QPointF                     duplicateOffset;
     quint32                     pixelSize;
     const KoColorSpace*         colorSpace;
     KoColorProfile*             profile;
     const KoCompositeOp*        compositeOp;
     const KoAbstractGradient*   gradient;
     KisPaintOpPresetSP          paintOpPreset;
     QImage                      polygonMaskImage;
     QPainter*                   maskPainter;
     KisFillPainter*             fillPainter;
     KisPaintDeviceSP            polygon;
     qint32                      maskImageWidth;
     qint32                      maskImageHeight;
     QPointF                     axesCenter;
     bool                        mirrorHorizontally;
     bool                        mirrorVertically;
     bool                        isOpacityUnit; // TODO: move into ParameterInfo
     KoCompositeOp::ParameterInfo paramInfo;
     KoColorConversionTransformation::Intent renderingIntent;
     KoColorConversionTransformation::ConversionFlags conversionFlags;
 
     bool tryReduceSourceRect(const KisPaintDevice *srcDev,
                              QRect *srcRect,
                              qint32 *srcX,
                              qint32 *srcY,
                              qint32 *srcWidth,
                              qint32 *srcHeight,
                              qint32 *dstX,
                              qint32 *dstY);
 
     void fillPainterPathImpl(const QPainterPath& path, const QRect &requestedRect);
 };
 
 KisPainter::KisPainter()
     : d(new Private(this))
 {
     init();
 }
 
 KisPainter::KisPainter(KisPaintDeviceSP device)
     : d(new Private(this, device->colorSpace()))
 {
     init();
     Q_ASSERT(device);
     begin(device);
 }
 
 KisPainter::KisPainter(KisPaintDeviceSP device, KisSelectionSP selection)
     : d(new Private(this, device->colorSpace()))
 {
     init();
     Q_ASSERT(device);
     begin(device);
     d->selection = selection;
 }
 
 void KisPainter::init()
 {
     d->selection = 0 ;
     d->transaction = 0;
     d->paintOp = 0;
     d->pattern = 0;
     d->sourceLayer = 0;
     d->fillStyle = FillStyleNone;
     d->strokeStyle = StrokeStyleBrush;
     d->antiAliasPolygonFill = true;
     d->progressUpdater = 0;
     d->gradient = 0;
     d->maskPainter = 0;
     d->fillPainter = 0;
     d->maskImageWidth = 255;
     d->maskImageHeight = 255;
     d->mirrorHorizontally = false;
     d->mirrorVertically = false;
     d->isOpacityUnit = true;
     d->paramInfo = KoCompositeOp::ParameterInfo();
     d->renderingIntent = KoColorConversionTransformation::internalRenderingIntent();
     d->conversionFlags = KoColorConversionTransformation::internalConversionFlags();
 }
 
 KisPainter::~KisPainter()
 {
     // TODO: Maybe, don't be that strict?
     // deleteTransaction();
     end();
 
     delete d->paintOp;
     delete d->maskPainter;
     delete d->fillPainter;
     delete d;
 }
 
 template <bool useOldData>
 void copyAreaOptimizedImpl(const QPoint &dstPt,
                            KisPaintDeviceSP src,
                            KisPaintDeviceSP dst,
                            const QRect &srcRect)
 {
     const QRect dstRect(dstPt, srcRect.size());
 
     const bool srcEmpty = (src->extent() & srcRect).isEmpty();
     const bool dstEmpty = (dst->extent() & dstRect).isEmpty();
 
     if (!srcEmpty || !dstEmpty) {
         if (srcEmpty) {
             dst->clear(dstRect);
         } else {
             KisPainter gc(dst);
             gc.setCompositeOp(dst->colorSpace()->compositeOp(COMPOSITE_COPY));
 
             if (useOldData) {
                 gc.bitBltOldData(dstRect.topLeft(), src, srcRect);
             } else {
                 gc.bitBlt(dstRect.topLeft(), src, srcRect);
             }
         }
     }
 }
 
 void KisPainter::copyAreaOptimized(const QPoint &dstPt,
                                    KisPaintDeviceSP src,
                                    KisPaintDeviceSP dst,
                                    const QRect &srcRect)
 {
     copyAreaOptimizedImpl<false>(dstPt, src, dst, srcRect);
 }
 
 void KisPainter::copyAreaOptimizedOldData(const QPoint &dstPt,
                                           KisPaintDeviceSP src,
                                           KisPaintDeviceSP dst,
                                           const QRect &srcRect)
 {
     copyAreaOptimizedImpl<true>(dstPt, src, dst, srcRect);
 }
 
 void KisPainter::copyAreaOptimized(const QPoint &dstPt,
                                    KisPaintDeviceSP src,
                                    KisPaintDeviceSP dst,
                                    const QRect &originalSrcRect,
                                    KisSelectionSP selection)
 {
     if (!selection) {
         copyAreaOptimized(dstPt, src, dst, originalSrcRect);
         return;
     }
 
     const QRect selectionRect = selection->selectedRect();
     const QRect srcRect = originalSrcRect & selectionRect;
     const QPoint dstOffset = srcRect.topLeft() - originalSrcRect.topLeft();
     const QRect dstRect = QRect(dstPt + dstOffset, srcRect.size());
 
     const bool srcEmpty = (src->extent() & srcRect).isEmpty();
     const bool dstEmpty = (dst->extent() & dstRect).isEmpty();
 
     if (!srcEmpty || !dstEmpty) {
         //if (srcEmpty) {
         // doesn't support dstRect
         // dst->clearSelection(selection);
         // } else */
         {
             KisPainter gc(dst);
             gc.setSelection(selection);
             gc.setCompositeOp(dst->colorSpace()->compositeOp(COMPOSITE_COPY));
             gc.bitBlt(dstRect.topLeft(), src, srcRect);
         }
     }
 }
 
 KisPaintDeviceSP KisPainter::convertToAlphaAsAlpha(KisPaintDeviceSP src)
 {
     const KoColorSpace *srcCS = src->colorSpace();
     const QRect processRect = src->extent();
     KisPaintDeviceSP dst(new KisPaintDevice(KoColorSpaceRegistry::instance()->alpha8()));
 
     KisSequentialConstIterator srcIt(src, processRect);
     KisSequentialIterator dstIt(dst, processRect);
 
     do {
         const quint8 *srcPtr = srcIt.rawDataConst();
         quint8 *alpha8Ptr = dstIt.rawData();
 
         const quint8 white = srcCS->intensity8(srcPtr);
         const quint8 alpha = srcCS->opacityU8(srcPtr);
 
         *alpha8Ptr = KoColorSpaceMaths<quint8>::multiply(alpha, KoColorSpaceMathsTraits<quint8>::unitValue - white);
     } while (srcIt.nextPixel() && dstIt.nextPixel());
 
     return dst;
 }
 
 KisPaintDeviceSP KisPainter::convertToAlphaAsGray(KisPaintDeviceSP src)
 {
     const KoColorSpace *srcCS = src->colorSpace();
     const QRect processRect = src->extent();
     KisPaintDeviceSP dst(new KisPaintDevice(KoColorSpaceRegistry::instance()->alpha8()));
 
     KisSequentialConstIterator srcIt(src, processRect);
     KisSequentialIterator dstIt(dst, processRect);
 
     do {
         const quint8 *srcPtr = srcIt.rawDataConst();
         quint8 *alpha8Ptr = dstIt.rawData();
 
         *alpha8Ptr = srcCS->intensity8(srcPtr);
     } while (srcIt.nextPixel() && dstIt.nextPixel());
 
     return dst;
 }
 
+bool KisPainter::checkDeviceHasTransparency(KisPaintDeviceSP dev)
+{
+    const QRect deviceBounds = dev->exactBounds();
+    const QRect imageBounds = dev->defaultBounds()->bounds();
+
+    if (deviceBounds.isEmpty() ||
+        (deviceBounds & imageBounds) != imageBounds) {
+
+        return true;
+    }
+
+    const KoColorSpace *cs = dev->colorSpace();
+    KisSequentialConstIterator it(dev, deviceBounds);
+
+    do {
+        if (cs->opacityU8(it.rawDataConst()) != OPACITY_OPAQUE_U8) {
+            return true;
+        }
+    } while(it.nextPixel());
+
+    return false;
+}
+
 void KisPainter::begin(KisPaintDeviceSP device)
 {
     begin(device, d->selection);
 }
 
 void KisPainter::begin(KisPaintDeviceSP device, KisSelectionSP selection)
 {
     if (!device) return;
     d->selection = selection;
     Q_ASSERT(device->colorSpace());
 
     end();
 
     d->device = device;
     d->colorSpace = device->colorSpace();
     d->compositeOp = d->colorSpace->compositeOp(COMPOSITE_OVER);
     d->pixelSize = device->pixelSize();
 }
 
 void KisPainter::end()
 {
     Q_ASSERT_X(!d->transaction, "KisPainter::end()",
                "end() was called for the painter having a transaction. "
                "Please use end/deleteTransaction() instead");
 }
 
 void KisPainter::beginTransaction(const KUndo2MagicString& transactionName,int timedID)
 {
     Q_ASSERT_X(!d->transaction, "KisPainter::beginTransaction()",
                "You asked for a new transaction while still having "
                "another one. Please finish the first one with "
                "end/deleteTransaction() first");
 
     d->transaction = new KisTransaction(transactionName, d->device);
     Q_CHECK_PTR(d->transaction);
     d->transaction->undoCommand()->setTimedID(timedID);
 }
 
 void KisPainter::revertTransaction()
 {
     Q_ASSERT_X(d->transaction, "KisPainter::revertTransaction()",
                "No transaction is in progress");
 
     d->transaction->revert();
     delete d->transaction;
     d->transaction = 0;
 }
 
 void KisPainter::endTransaction(KisUndoAdapter *undoAdapter)
 {
     Q_ASSERT_X(d->transaction, "KisPainter::endTransaction()",
                "No transaction is in progress");
 
     d->transaction->commit(undoAdapter);
     delete d->transaction;
     d->transaction = 0;
 }
 
 void KisPainter::endTransaction(KisPostExecutionUndoAdapter *undoAdapter)
 {
     Q_ASSERT_X(d->transaction, "KisPainter::endTransaction()",
                "No transaction is in progress");
 
     d->transaction->commit(undoAdapter);
     delete d->transaction;
     d->transaction = 0;
 }
 
 KUndo2Command* KisPainter::endAndTakeTransaction()
 {
     Q_ASSERT_X(d->transaction, "KisPainter::endTransaction()",
                "No transaction is in progress");
 
     KUndo2Command *transactionData = d->transaction->endAndTake();
     delete d->transaction;
     d->transaction = 0;
 
     return transactionData;
 }
 
 void KisPainter::deleteTransaction()
 {
     if (!d->transaction) return;
 
     delete d->transaction;
     d->transaction = 0;
 }
 
 void KisPainter::putTransaction(KisTransaction* transaction)
 {
     Q_ASSERT_X(!d->transaction, "KisPainter::putTransaction()",
                "You asked for a new transaction while still having "
                "another one. Please finish the first one with "
                "end/deleteTransaction() first");
 
     d->transaction = transaction;
 }
 
 KisTransaction* KisPainter::takeTransaction()
 {
     Q_ASSERT_X(d->transaction, "KisPainter::takeTransaction()",
                "No transaction is in progress");
     KisTransaction *temp = d->transaction;
     d->transaction = 0;
     return temp;
 }
 
 QVector<QRect> KisPainter::takeDirtyRegion()
 {
     QVector<QRect> vrect = d->dirtyRects;
     d->dirtyRects.clear();
     return vrect;
 }
 
 
 void KisPainter::addDirtyRect(const QRect & rc)
 {
     QRect r = rc.normalized();
     if (r.isValid()) {
         d->dirtyRects.append(rc);
     }
 }
 
 inline bool KisPainter::Private::tryReduceSourceRect(const KisPaintDevice *srcDev,
                                                      QRect *srcRect,
                                                      qint32 *srcX,
                                                      qint32 *srcY,
                                                      qint32 *srcWidth,
                                                      qint32 *srcHeight,
                                                      qint32 *dstX,
                                                      qint32 *dstY)
 {
     /**
      * In case of COMPOSITE_COPY and Wrap Around Mode even the pixels
      * outside the device extent matter, because they will be either
      * directly copied (former case) or cloned from another area of
      * the image.
      */
     if (compositeOp->id() != COMPOSITE_COPY &&
         compositeOp->id() != COMPOSITE_DESTINATION_IN  &&
         compositeOp->id() != COMPOSITE_DESTINATION_ATOP &&
         !srcDev->defaultBounds()->wrapAroundMode()) {
 
         /**
          * If srcDev->extent() (the area of the tiles containing
          * srcDev) is smaller than srcRect, then shrink srcRect to
          * that size. This is done as a speed optimization, useful for
          * stack recomposition in KisImage. srcRect won't grow if
          * srcDev->extent() is larger.
          */
         *srcRect &= srcDev->extent();
 
         if (srcRect->isEmpty()) return true;
 
         // Readjust the function paramenters to the new dimensions.
         *dstX += srcRect->x() - *srcX;    // This will only add, not subtract
         *dstY += srcRect->y() - *srcY;    // Idem
         srcRect->getRect(srcX, srcY, srcWidth, srcHeight);
     }
 
     return false;
 }
 
 void KisPainter::bitBltWithFixedSelection(qint32 dstX, qint32 dstY,
                                           const KisPaintDeviceSP srcDev,
                                           const KisFixedPaintDeviceSP selection,
                                           qint32 selX, qint32 selY,
                                           qint32 srcX, qint32 srcY,
                                           qint32 srcWidth, qint32 srcHeight)
 {
     // TODO: get selX and selY working as intended
 
     /* This check for nonsense ought to be a Q_ASSERT. However, when paintops are just
     initializing they perform some dummy passes with those parameters, and it must not crash */
     if (srcWidth == 0 || srcHeight == 0) return;
     if (srcDev.isNull()) return;
     if (d->device.isNull()) return;
 
     // Check that selection has an alpha colorspace, crash if false
     Q_ASSERT(selection->colorSpace() == KoColorSpaceRegistry::instance()->alpha8());
 
     QRect srcRect = QRect(srcX, srcY, srcWidth, srcHeight);
     QRect selRect = QRect(selX, selY, srcWidth, srcHeight);
 
     /* Trying to read outside a KisFixedPaintDevice is inherently wrong and shouldn't be done,
     so crash if someone attempts to do this. Don't resize YET as it would obfuscate the mistake. */
     Q_ASSERT(selection->bounds().contains(selRect));
     Q_UNUSED(selRect); // only used by the above Q_ASSERT
 
     /**
      * An optimization, which crops the source rect by the bounds of
      * the source device when it is possible
      */
     if (d->tryReduceSourceRect(srcDev, &srcRect,
                                &srcX, &srcY,
                                &srcWidth, &srcHeight,
                                &dstX, &dstY)) return;
 
     /* Create an intermediate byte array to hold information before it is written
     to the current paint device (d->device) */
     quint8* dstBytes = 0;
     try {
         dstBytes = new quint8[srcWidth * srcHeight * d->device->pixelSize()];
     } catch (std::bad_alloc) {
         warnKrita << "KisPainter::bitBltWithFixedSelection std::bad_alloc for " << srcWidth << " * " << srcHeight << " * " << d->device->pixelSize() << "dst bytes";
         return;
     }
 
     d->device->readBytes(dstBytes, dstX, dstY, srcWidth, srcHeight);
 
     // Copy the relevant bytes of raw data from srcDev
     quint8* srcBytes = 0;
     try {
         srcBytes = new quint8[srcWidth * srcHeight * srcDev->pixelSize()];
     } catch (std::bad_alloc) {
         warnKrita << "KisPainter::bitBltWithFixedSelection std::bad_alloc for " << srcWidth << " * " << srcHeight << " * " << d->device->pixelSize() << "src bytes";
         return;
     }
 
     srcDev->readBytes(srcBytes, srcX, srcY, srcWidth, srcHeight);
 
     QRect selBounds = selection->bounds();
     const quint8 *selRowStart = selection->data() +
         (selBounds.width() * (selY - selBounds.top()) + (selX - selBounds.left())) * selection->pixelSize();
 
     /*
      * This checks whether there is nothing selected.
      */
     if (!d->selection) {
         /* As there's nothing selected, blit to dstBytes (intermediary bit array),
           ignoring d->selection (the user selection)*/
         d->paramInfo.dstRowStart   = dstBytes;
         d->paramInfo.dstRowStride  = srcWidth * d->device->pixelSize();
         d->paramInfo.srcRowStart   = srcBytes;
         d->paramInfo.srcRowStride  = srcWidth * srcDev->pixelSize();
         d->paramInfo.maskRowStart  = selRowStart;
         d->paramInfo.maskRowStride = selBounds.width() * selection->pixelSize();
         d->paramInfo.rows          = srcHeight;
         d->paramInfo.cols          = srcWidth;
         d->colorSpace->bitBlt(srcDev->colorSpace(), d->paramInfo, d->compositeOp, d->renderingIntent, d->conversionFlags);
     }
     else {
         /* Read the user selection (d->selection) bytes into an array, ready
         to merge in the next block*/
         quint32 totalBytes = srcWidth * srcHeight * selection->pixelSize();
         quint8* mergedSelectionBytes = 0;
         try {
             mergedSelectionBytes = new quint8[ totalBytes ];
         } catch (std::bad_alloc) {
             warnKrita << "KisPainter::bitBltWithFixedSelection std::bad_alloc for " << srcWidth << " * " << srcHeight << " * " << d->device->pixelSize() << "total bytes";
             return;
         }
 
         d->selection->projection()->readBytes(mergedSelectionBytes, dstX, dstY, srcWidth, srcHeight);
 
         // Merge selections here by multiplying them - compositeOP(COMPOSITE_MULT)
         d->paramInfo.dstRowStart   = mergedSelectionBytes;
         d->paramInfo.dstRowStride  = srcWidth * selection->pixelSize();
         d->paramInfo.srcRowStart   = selRowStart;
         d->paramInfo.srcRowStride  = selBounds.width() * selection->pixelSize();
         d->paramInfo.maskRowStart  = 0;
         d->paramInfo.maskRowStride = 0;
         d->paramInfo.rows          = srcHeight;
         d->paramInfo.cols          = srcWidth;
         KoColorSpaceRegistry::instance()->alpha8()->compositeOp(COMPOSITE_MULT)->composite(d->paramInfo);
 
         // Blit to dstBytes (intermediary bit array)
         d->paramInfo.dstRowStart   = dstBytes;
         d->paramInfo.dstRowStride  = srcWidth * d->device->pixelSize();
         d->paramInfo.srcRowStart   = srcBytes;
         d->paramInfo.srcRowStride  = srcWidth * srcDev->pixelSize();
         d->paramInfo.maskRowStart  = mergedSelectionBytes;
         d->paramInfo.maskRowStride = srcWidth * selection->pixelSize();
         d->colorSpace->bitBlt(srcDev->colorSpace(), d->paramInfo, d->compositeOp, d->renderingIntent, d->conversionFlags);
         delete[] mergedSelectionBytes;
     }
 
     d->device->writeBytes(dstBytes, dstX, dstY, srcWidth, srcHeight);
 
     delete[] dstBytes;
     delete[] srcBytes;
 
     addDirtyRect(QRect(dstX, dstY, srcWidth, srcHeight));
 }
 
 
 void KisPainter::bitBltWithFixedSelection(qint32 dstX, qint32 dstY,
                                           const KisPaintDeviceSP srcDev,
                                           const KisFixedPaintDeviceSP selection,
                                           qint32 srcWidth, qint32 srcHeight)
 {
     bitBltWithFixedSelection(dstX, dstY, srcDev, selection, 0, 0, 0, 0, srcWidth, srcHeight);
 }
 
 template <bool useOldSrcData>
 void KisPainter::bitBltImpl(qint32 dstX, qint32 dstY,
                             const KisPaintDeviceSP srcDev,
                             qint32 srcX, qint32 srcY,
                             qint32 srcWidth, qint32 srcHeight)
 {
     /* This check for nonsense ought to be a Q_ASSERT. However, when paintops are just
     initializing they perform some dummy passes with those parameters, and it must not crash */
     if (srcWidth == 0 || srcHeight == 0) return;
     if (srcDev.isNull()) return;
     if (d->device.isNull()) return;
 
     QRect srcRect = QRect(srcX, srcY, srcWidth, srcHeight);
 
     if (d->compositeOp->id() == COMPOSITE_COPY) {
         if(!d->selection && d->isOpacityUnit &&
            srcX == dstX && srcY == dstY &&
            d->device->fastBitBltPossible(srcDev)) {
 
             if(useOldSrcData) {
                 d->device->fastBitBltOldData(srcDev, srcRect);
             } else {
                 d->device->fastBitBlt(srcDev, srcRect);
             }
 
             addDirtyRect(srcRect);
             return;
         }
     }
     else {
         /**
          * An optimization, which crops the source rect by the bounds of
          * the source device when it is possible
          */
         if (d->tryReduceSourceRect(srcDev, &srcRect,
                                    &srcX, &srcY,
                                    &srcWidth, &srcHeight,
                                    &dstX, &dstY)) return;
     }
 
     qint32 dstY_ = dstY;
     qint32 srcY_ = srcY;
     qint32 rowsRemaining = srcHeight;
 
     // Read below
     KisRandomConstAccessorSP srcIt = srcDev->createRandomConstAccessorNG(srcX, srcY);
     KisRandomAccessorSP dstIt = d->device->createRandomAccessorNG(dstX, dstY);
 
     /* Here be a huge block of verbose code that does roughly the same than
     the other bit blit operations. This one is longer than the rest in an effort to
     optimize speed and memory use */
     if (d->selection) {
         KisPaintDeviceSP selectionProjection(d->selection->projection());
         KisRandomConstAccessorSP maskIt = selectionProjection->createRandomConstAccessorNG(dstX, dstY);
 
         while (rowsRemaining > 0) {
 
             qint32 dstX_ = dstX;
             qint32 srcX_ = srcX;
             qint32 columnsRemaining = srcWidth;
             qint32 numContiguousDstRows = dstIt->numContiguousRows(dstY_);
             qint32 numContiguousSrcRows = srcIt->numContiguousRows(srcY_);
             qint32 numContiguousSelRows = maskIt->numContiguousRows(dstY_);
 
             qint32 rows = qMin(numContiguousDstRows, numContiguousSrcRows);
             rows = qMin(rows, numContiguousSelRows);
             rows = qMin(rows, rowsRemaining);
 
             while (columnsRemaining > 0) {
 
                 qint32 numContiguousDstColumns = dstIt->numContiguousColumns(dstX_);
                 qint32 numContiguousSrcColumns = srcIt->numContiguousColumns(srcX_);
                 qint32 numContiguousSelColumns = maskIt->numContiguousColumns(dstX_);
 
                 qint32 columns = qMin(numContiguousDstColumns, numContiguousSrcColumns);
                 columns = qMin(columns, numContiguousSelColumns);
                 columns = qMin(columns, columnsRemaining);
 
                 qint32 srcRowStride = srcIt->rowStride(srcX_, srcY_);
                 srcIt->moveTo(srcX_, srcY_);
 
                 qint32 dstRowStride = dstIt->rowStride(dstX_, dstY_);
                 dstIt->moveTo(dstX_, dstY_);
 
                 qint32 maskRowStride = maskIt->rowStride(dstX_, dstY_);
                 maskIt->moveTo(dstX_, dstY_);
 
                 d->paramInfo.dstRowStart   = dstIt->rawData();
                 d->paramInfo.dstRowStride  = dstRowStride;
                 // if we don't use the oldRawData, we need to access the rawData of the source device.
                 d->paramInfo.srcRowStart   = useOldSrcData ? srcIt->oldRawData() : static_cast<KisRandomAccessor2*>(srcIt.data())->rawData();
                 d->paramInfo.srcRowStride  = srcRowStride;
                 d->paramInfo.maskRowStart  = static_cast<KisRandomAccessor2*>(maskIt.data())->rawData();
                 d->paramInfo.maskRowStride = maskRowStride;
                 d->paramInfo.rows          = rows;
                 d->paramInfo.cols          = columns;
                 d->colorSpace->bitBlt(srcDev->colorSpace(), d->paramInfo, d->compositeOp, d->renderingIntent, d->conversionFlags);
 
                 srcX_ += columns;
                 dstX_ += columns;
                 columnsRemaining -= columns;
             }
 
             srcY_ += rows;
             dstY_ += rows;
             rowsRemaining -= rows;
         }
     }
     else {
 
         while (rowsRemaining > 0) {
 
             qint32 dstX_ = dstX;
             qint32 srcX_ = srcX;
             qint32 columnsRemaining = srcWidth;
             qint32 numContiguousDstRows = dstIt->numContiguousRows(dstY_);
             qint32 numContiguousSrcRows = srcIt->numContiguousRows(srcY_);
 
             qint32 rows = qMin(numContiguousDstRows, numContiguousSrcRows);
             rows = qMin(rows, rowsRemaining);
 
             while (columnsRemaining > 0) {
 
                 qint32 numContiguousDstColumns = dstIt->numContiguousColumns(dstX_);
                 qint32 numContiguousSrcColumns = srcIt->numContiguousColumns(srcX_);
 
                 qint32 columns = qMin(numContiguousDstColumns, numContiguousSrcColumns);
                 columns = qMin(columns, columnsRemaining);
 
                 qint32 srcRowStride = srcIt->rowStride(srcX_, srcY_);
                 srcIt->moveTo(srcX_, srcY_);
 
                 qint32 dstRowStride = dstIt->rowStride(dstX_, dstY_);
                 dstIt->moveTo(dstX_, dstY_);
 
                 d->paramInfo.dstRowStart   = dstIt->rawData();
                 d->paramInfo.dstRowStride  = dstRowStride;
                 // if we don't use the oldRawData, we need to access the rawData of the source device.
                 d->paramInfo.srcRowStart   = useOldSrcData ? srcIt->oldRawData() : static_cast<KisRandomAccessor2*>(srcIt.data())->rawData();
                 d->paramInfo.srcRowStride  = srcRowStride;
                 d->paramInfo.maskRowStart  = 0;
                 d->paramInfo.maskRowStride = 0;
                 d->paramInfo.rows          = rows;
                 d->paramInfo.cols          = columns;
                 d->colorSpace->bitBlt(srcDev->colorSpace(), d->paramInfo, d->compositeOp, d->renderingIntent, d->conversionFlags);
 
                 srcX_ += columns;
                 dstX_ += columns;
                 columnsRemaining -= columns;
             }
 
             srcY_ += rows;
             dstY_ += rows;
             rowsRemaining -= rows;
         }
     }
 
     addDirtyRect(QRect(dstX, dstY, srcWidth, srcHeight));
 
 }
 
 void KisPainter::bitBlt(qint32 dstX, qint32 dstY,
                         const KisPaintDeviceSP srcDev,
                         qint32 srcX, qint32 srcY,
                         qint32 srcWidth, qint32 srcHeight)
 {
     bitBltImpl<false>(dstX, dstY, srcDev, srcX, srcY, srcWidth, srcHeight);
 }
 
 
 void KisPainter::bitBlt(const QPoint & pos, const KisPaintDeviceSP srcDev, const QRect & srcRect)
 {
     bitBlt(pos.x(), pos.y(), srcDev, srcRect.x(), srcRect.y(), srcRect.width(), srcRect.height());
 }
 
 void KisPainter::bitBltOldData(qint32 dstX, qint32 dstY,
                                const KisPaintDeviceSP srcDev,
                                qint32 srcX, qint32 srcY,
                                qint32 srcWidth, qint32 srcHeight)
 {
     bitBltImpl<true>(dstX, dstY, srcDev, srcX, srcY, srcWidth, srcHeight);
 }
 
 
 void KisPainter::bitBltOldData(const QPoint & pos, const KisPaintDeviceSP srcDev, const QRect & srcRect)
 {
     bitBltOldData(pos.x(), pos.y(), srcDev, srcRect.x(), srcRect.y(), srcRect.width(), srcRect.height());
 }
 
 
 void KisPainter::fill(qint32 x, qint32 y, qint32 width, qint32 height, const KoColor& color)
 {
     /* This check for nonsense ought to be a Q_ASSERT. However, when paintops are just
      * initializing they perform some dummy passes with those parameters, and it must not crash */
     if(width == 0 || height == 0 || d->device.isNull())
         return;
 
     KoColor srcColor(color, d->device->compositionSourceColorSpace());
     qint32  dstY          = y;
     qint32  rowsRemaining = height;
 
     KisRandomAccessorSP dstIt = d->device->createRandomAccessorNG(x, y);
 
     if(d->selection) {
         KisPaintDeviceSP selectionProjection(d->selection->projection());
         KisRandomConstAccessorSP maskIt = selectionProjection->createRandomConstAccessorNG(x, y);
 
         while(rowsRemaining > 0) {
 
             qint32 dstX                 = x;
             qint32 columnsRemaining     = width;
             qint32 numContiguousDstRows = dstIt->numContiguousRows(dstY);
             qint32 numContiguousSelRows = maskIt->numContiguousRows(dstY);
             qint32 rows = qMin(numContiguousDstRows, numContiguousSelRows);
             rows = qMin(rows, rowsRemaining);
 
             while (columnsRemaining > 0) {
 
                 qint32 numContiguousDstColumns = dstIt->numContiguousColumns(dstX);
                 qint32 numContiguousSelColumns = maskIt->numContiguousColumns(dstX);
 
                 qint32 columns = qMin(numContiguousDstColumns, numContiguousSelColumns);
                 columns = qMin(columns, columnsRemaining);
 
                 qint32 dstRowStride = dstIt->rowStride(dstX, dstY);
                 dstIt->moveTo(dstX, dstY);
                 qint32 maskRowStride = maskIt->rowStride(dstX, dstY);
 
                 maskIt->moveTo(dstX, dstY);
 
                 d->paramInfo.dstRowStart   = dstIt->rawData();
                 d->paramInfo.dstRowStride  = dstRowStride;
                 d->paramInfo.srcRowStart   = srcColor.data();
                 d->paramInfo.srcRowStride  = 0; // srcRowStride is set to zero to use the compositeOp with only a single color pixel
                 d->paramInfo.maskRowStart  = maskIt->oldRawData();
                 d->paramInfo.maskRowStride = maskRowStride;
                 d->paramInfo.rows          = rows;
                 d->paramInfo.cols          = columns;
                 d->colorSpace->bitBlt(srcColor.colorSpace(), d->paramInfo, d->compositeOp, d->renderingIntent, d->conversionFlags);
 
                 dstX             += columns;
                 columnsRemaining -= columns;
             }
 
             dstY          += rows;
             rowsRemaining -= rows;
         }
     }
     else {
 
         while(rowsRemaining > 0) {
 
             qint32 dstX                 = x;
             qint32 columnsRemaining     = width;
             qint32 numContiguousDstRows = dstIt->numContiguousRows(dstY);
             qint32 rows                 = qMin(numContiguousDstRows, rowsRemaining);
 
             while(columnsRemaining > 0) {
 
                 qint32 numContiguousDstColumns = dstIt->numContiguousColumns(dstX);
                 qint32 columns                 = qMin(numContiguousDstColumns, columnsRemaining);
                 qint32 dstRowStride            = dstIt->rowStride(dstX, dstY);
                 dstIt->moveTo(dstX, dstY);
 
                 d->paramInfo.dstRowStart   = dstIt->rawData();
                 d->paramInfo.dstRowStride  = dstRowStride;
                 d->paramInfo.srcRowStart   = srcColor.data();
                 d->paramInfo.srcRowStride  = 0; // srcRowStride is set to zero to use the compositeOp with only a single color pixel
                 d->paramInfo.maskRowStart  = 0;
                 d->paramInfo.maskRowStride = 0;
                 d->paramInfo.rows          = rows;
                 d->paramInfo.cols          = columns;
                 d->colorSpace->bitBlt(srcColor.colorSpace(), d->paramInfo, d->compositeOp, d->renderingIntent, d->conversionFlags);
 
                 dstX             += columns;
                 columnsRemaining -= columns;
             }
 
             dstY          += rows;
             rowsRemaining -= rows;
         }
     }
 
     addDirtyRect(QRect(x, y, width, height));
 }
 
 
 void KisPainter::bltFixed(qint32 dstX, qint32 dstY,
                           const KisFixedPaintDeviceSP srcDev,
                           qint32 srcX, qint32 srcY,
                           qint32 srcWidth, qint32 srcHeight)
 {
     /* This check for nonsense ought to be a Q_ASSERT. However, when paintops are just
     initializing they perform some dummy passes with those parameters, and it must not crash */
     if (srcWidth == 0 || srcHeight == 0) return;
     if (srcDev.isNull()) return;
     if (d->device.isNull()) return;
 
     QRect srcRect = QRect(srcX, srcY, srcWidth, srcHeight);
     QRect srcBounds = srcDev->bounds();
 
     /* Trying to read outside a KisFixedPaintDevice is inherently wrong and shouldn't be done,
     so crash if someone attempts to do this. Don't resize as it would obfuscate the mistake. */
     Q_ASSERT(srcBounds.contains(srcRect));
     Q_UNUSED(srcRect); // only used in above assertion
 
     /* Create an intermediate byte array to hold information before it is written
     to the current paint device (aka: d->device) */
     quint8* dstBytes = 0;
     try {
          dstBytes = new quint8[srcWidth * srcHeight * d->device->pixelSize()];
     } catch (std::bad_alloc) {
         warnKrita << "KisPainter::bltFixed std::bad_alloc for " << srcWidth << " * " << srcHeight << " * " << d->device->pixelSize() << "total bytes";
         return;
     }
     d->device->readBytes(dstBytes, dstX, dstY, srcWidth, srcHeight);
 
     const quint8 *srcRowStart = srcDev->data() +
         (srcBounds.width() * (srcY - srcBounds.top()) + (srcX - srcBounds.left())) * srcDev->pixelSize();
 
     d->paramInfo.dstRowStart   = dstBytes;
     d->paramInfo.dstRowStride  = srcWidth * d->device->pixelSize();
     d->paramInfo.srcRowStart   = srcRowStart;
     d->paramInfo.srcRowStride  = srcBounds.width() * srcDev->pixelSize();
     d->paramInfo.maskRowStart  = 0;
     d->paramInfo.maskRowStride = 0;
     d->paramInfo.rows          = srcHeight;
     d->paramInfo.cols          = srcWidth;
 
     if (d->selection) {
         /* d->selection is a KisPaintDevice, so first a readBytes is performed to
         get the area of interest... */
         KisPaintDeviceSP selectionProjection(d->selection->projection());
         quint8* selBytes = 0;
         try {
             selBytes = new quint8[srcWidth * srcHeight * selectionProjection->pixelSize()];
         }
         catch (std::bad_alloc) {
             delete[] dstBytes;
             return;
         }
 
         selectionProjection->readBytes(selBytes, dstX, dstY, srcWidth, srcHeight);
         d->paramInfo.maskRowStart = selBytes;
         d->paramInfo.maskRowStride = srcWidth * selectionProjection->pixelSize();
     }
 
     // ...and then blit.
     d->colorSpace->bitBlt(srcDev->colorSpace(), d->paramInfo, d->compositeOp, d->renderingIntent, d->conversionFlags);
     d->device->writeBytes(dstBytes, dstX, dstY, srcWidth, srcHeight);
 
     delete[] d->paramInfo.maskRowStart;
     delete[] dstBytes;
 
     addDirtyRect(QRect(dstX, dstY, srcWidth, srcHeight));
 }
 
 void KisPainter::bltFixed(const QPoint & pos, const KisFixedPaintDeviceSP srcDev, const QRect & srcRect)
 {
     bltFixed(pos.x(), pos.y(), srcDev, srcRect.x(), srcRect.y(), srcRect.width(), srcRect.height());
 }
 
 void KisPainter::bltFixedWithFixedSelection(qint32 dstX, qint32 dstY,
                                             const KisFixedPaintDeviceSP srcDev,
                                             const KisFixedPaintDeviceSP selection,
                                             qint32 selX, qint32 selY,
                                             qint32 srcX, qint32 srcY,
                                             quint32 srcWidth, quint32 srcHeight)
 {
     // TODO: get selX and selY working as intended
 
     /* This check for nonsense ought to be a Q_ASSERT. However, when paintops are just
     initializing they perform some dummy passes with those parameters, and it must not crash */
     if (srcWidth == 0 || srcHeight == 0) return;
     if (srcDev.isNull()) return;
     if (d->device.isNull()) return;
 
      // Check that selection has an alpha colorspace, crash if false
     Q_ASSERT(selection->colorSpace() == KoColorSpaceRegistry::instance()->alpha8());
 
     QRect srcRect = QRect(srcX, srcY, srcWidth, srcHeight);
     QRect selRect = QRect(selX, selY, srcWidth, srcHeight);
 
     QRect srcBounds = srcDev->bounds();
     QRect selBounds = selection->bounds();
 
     /* Trying to read outside a KisFixedPaintDevice is inherently wrong and shouldn't be done,
     so crash if someone attempts to do this. Don't resize as it would obfuscate the mistake. */
     Q_ASSERT(srcBounds.contains(srcRect));
     Q_UNUSED(srcRect); // only used in above assertion
     Q_ASSERT(selBounds.contains(selRect));
     Q_UNUSED(selRect); // only used in above assertion
 
     /* Create an intermediate byte array to hold information before it is written
     to the current paint device (aka: d->device) */
     quint8* dstBytes = 0;
     try {
         dstBytes = new quint8[srcWidth * srcHeight * d->device->pixelSize()];
     } catch (std::bad_alloc) {
         warnKrita << "KisPainter::bltFixedWithFixedSelection std::bad_alloc for " << srcWidth << " * " << srcHeight << " * " << d->device->pixelSize() << "total bytes";
         return;
     }
     d->device->readBytes(dstBytes, dstX, dstY, srcWidth, srcHeight);
 
     const quint8 *srcRowStart = srcDev->data() +
         (srcBounds.width() * (srcY - srcBounds.top()) + (srcX - srcBounds.left())) * srcDev->pixelSize();
     const quint8 *selRowStart = selection->data() +
         (selBounds.width() * (selY - selBounds.top()) + (selX - selBounds.left())) * selection->pixelSize();
 
     if (!d->selection) {
         /* As there's nothing selected, blit to dstBytes (intermediary bit array),
           ignoring d->selection (the user selection)*/
         d->paramInfo.dstRowStart   = dstBytes;
         d->paramInfo.dstRowStride  = srcWidth * d->device->pixelSize();
         d->paramInfo.srcRowStart   = srcRowStart;
         d->paramInfo.srcRowStride  = srcBounds.width() * srcDev->pixelSize();
         d->paramInfo.maskRowStart  = selRowStart;
         d->paramInfo.maskRowStride = selBounds.width() * selection->pixelSize();
         d->paramInfo.rows          = srcHeight;
         d->paramInfo.cols          = srcWidth;
         d->colorSpace->bitBlt(srcDev->colorSpace(), d->paramInfo, d->compositeOp, d->renderingIntent, d->conversionFlags);
     }
     else {
         /* Read the user selection (d->selection) bytes into an array, ready
         to merge in the next block*/
         quint32 totalBytes = srcWidth * srcHeight * selection->pixelSize();
         quint8 * mergedSelectionBytes = 0;
         try {
             mergedSelectionBytes = new quint8[ totalBytes ];
         } catch (std::bad_alloc) {
             warnKrita << "KisPainter::bltFixedWithFixedSelection std::bad_alloc for " << totalBytes << "total bytes";
             delete[] dstBytes;
             return;
         }
         d->selection->projection()->readBytes(mergedSelectionBytes, dstX, dstY, srcWidth, srcHeight);
 
         // Merge selections here by multiplying them - compositeOp(COMPOSITE_MULT)
         d->paramInfo.dstRowStart   = mergedSelectionBytes;
         d->paramInfo.dstRowStride  = srcWidth * selection->pixelSize();
         d->paramInfo.srcRowStart   = selRowStart;
         d->paramInfo.srcRowStride  = selBounds.width() * selection->pixelSize();
         d->paramInfo.maskRowStart  = 0;
         d->paramInfo.maskRowStride = 0;
         d->paramInfo.rows          = srcHeight;
         d->paramInfo.cols          = srcWidth;
         KoColorSpaceRegistry::instance()->alpha8()->compositeOp(COMPOSITE_MULT)->composite(d->paramInfo);
 
         // Blit to dstBytes (intermediary bit array)
         d->paramInfo.dstRowStart   = dstBytes;
         d->paramInfo.dstRowStride  = srcWidth * d->device->pixelSize();
         d->paramInfo.srcRowStart   = srcRowStart;
         d->paramInfo.srcRowStride  = srcBounds.width() * srcDev->pixelSize();
         d->paramInfo.maskRowStart  = mergedSelectionBytes;
         d->paramInfo.maskRowStride = srcWidth * selection->pixelSize();
         d->colorSpace->bitBlt(srcDev->colorSpace(), d->paramInfo, d->compositeOp, d->renderingIntent, d->conversionFlags);
 
         delete[] mergedSelectionBytes;
     }
 
     d->device->writeBytes(dstBytes, dstX, dstY, srcWidth, srcHeight);
 
     delete[] dstBytes;
 
     addDirtyRect(QRect(dstX, dstY, srcWidth, srcHeight));
 }
 
 void KisPainter::bltFixedWithFixedSelection(qint32 dstX, qint32 dstY,
                                             const KisFixedPaintDeviceSP srcDev,
                                             const KisFixedPaintDeviceSP selection,
                                             quint32 srcWidth, quint32 srcHeight)
 {
     bltFixedWithFixedSelection(dstX, dstY, srcDev, selection, 0, 0, 0, 0, srcWidth, srcHeight);
 }
 
 
 
 
 
 void KisPainter::paintLine(const KisPaintInformation &pi1,
                            const KisPaintInformation &pi2,
                            KisDistanceInformation *currentDistance)
 {
     if (d->device && d->paintOp && d->paintOp->canPaint()) {
         d->paintOp->paintLine(pi1, pi2, currentDistance);
     }
 }
 
 
 void KisPainter::paintPolyline(const vQPointF &points,
                                int index, int numPoints)
 {
     if (index >= (int) points.count())
         return;
 
     if (numPoints < 0)
         numPoints = points.count();
 
     if (index + numPoints > (int) points.count())
         numPoints = points.count() - index;
 
 
     KisDistanceInformation saveDist;
     for (int i = index; i < index + numPoints - 1; i++) {
         paintLine(points [i], points [i + 1], &saveDist);
     }
 }
 
 static void getBezierCurvePoints(const KisVector2D &pos1,
                                  const KisVector2D &control1,
                                  const KisVector2D &control2,
                                  const KisVector2D &pos2,
                                  vQPointF& points)
 {
     LineEquation line = LineEquation::Through(pos1, pos2);
     qreal d1 = line.absDistance(control1);
     qreal d2 = line.absDistance(control2);
 
     if (d1 < BEZIER_FLATNESS_THRESHOLD && d2 < BEZIER_FLATNESS_THRESHOLD) {
         points.push_back(toQPointF(pos1));
     } else {
         // Midpoint subdivision. See Foley & Van Dam Computer Graphics P.508
 
         KisVector2D l2 = (pos1 + control1) / 2;
         KisVector2D h = (control1 + control2) / 2;
         KisVector2D l3 = (l2 + h) / 2;
         KisVector2D r3 = (control2 + pos2) / 2;
         KisVector2D r2 = (h + r3) / 2;
         KisVector2D l4 = (l3 + r2) / 2;
 
         getBezierCurvePoints(pos1, l2, l3, l4, points);
         getBezierCurvePoints(l4, r2, r3, pos2, points);
     }
 }
 
 void KisPainter::getBezierCurvePoints(const QPointF &pos1,
                                       const QPointF &control1,
                                       const QPointF &control2,
                                       const QPointF &pos2,
                                       vQPointF& points) const
 {
     ::getBezierCurvePoints(toKisVector2D(pos1), toKisVector2D(control1), toKisVector2D(control2), toKisVector2D(pos2), points);
 }
 
 void KisPainter::paintBezierCurve(const KisPaintInformation &pi1,
                                   const QPointF &control1,
                                   const QPointF &control2,
                                   const KisPaintInformation &pi2,
                                   KisDistanceInformation *currentDistance)
 {
     if (d->paintOp && d->paintOp->canPaint()) {
         d->paintOp->paintBezierCurve(pi1, control1, control2, pi2, currentDistance);
     }
 }
 
 void KisPainter::paintRect(const QRectF &rect)
 {
     QRectF normalizedRect = rect.normalized();
 
     vQPointF points;
 
     points.push_back(normalizedRect.topLeft());
     points.push_back(normalizedRect.bottomLeft());
     points.push_back(normalizedRect.bottomRight());
     points.push_back(normalizedRect.topRight());
 
     paintPolygon(points);
 }
 
 void KisPainter::paintRect(const qreal x,
                            const qreal y,
                            const qreal w,
                            const qreal h)
 {
     paintRect(QRectF(x, y, w, h));
 }
 
 void KisPainter::paintEllipse(const QRectF &rect)
 {
     QRectF r = rect.normalized(); // normalize before checking as negative width and height are empty too
     if (r.isEmpty()) return;
 
     // See http://www.whizkidtech.redprince.net/bezier/circle/ for explanation.
     // kappa = (4/3*(sqrt(2)-1))
     const qreal kappa = 0.5522847498;
     const qreal lx = (r.width() / 2) * kappa;
     const qreal ly = (r.height() / 2) * kappa;
 
     QPointF center = r.center();
 
     QPointF p0(r.left(), center.y());
     QPointF p1(r.left(), center.y() - ly);
     QPointF p2(center.x() - lx, r.top());
     QPointF p3(center.x(), r.top());
 
     vQPointF points;
 
     getBezierCurvePoints(p0, p1, p2, p3, points);
 
     QPointF p4(center.x() + lx, r.top());
     QPointF p5(r.right(), center.y() - ly);
     QPointF p6(r.right(), center.y());
 
     getBezierCurvePoints(p3, p4, p5, p6, points);
 
     QPointF p7(r.right(), center.y() + ly);
     QPointF p8(center.x() + lx, r.bottom());
     QPointF p9(center.x(), r.bottom());
 
     getBezierCurvePoints(p6, p7, p8, p9, points);
 
     QPointF p10(center.x() - lx, r.bottom());
     QPointF p11(r.left(), center.y() + ly);
 
     getBezierCurvePoints(p9, p10, p11, p0, points);
 
     paintPolygon(points);
 }
 
 void KisPainter::paintEllipse(const qreal x,
                               const qreal y,
                               const qreal w,
                               const qreal h)
 {
     paintEllipse(QRectF(x, y, w, h));
 }
 
 void KisPainter::paintAt(const KisPaintInformation& pi,
                          KisDistanceInformation *savedDist)
 {
     if (d->paintOp && d->paintOp->canPaint()) {
         d->paintOp->paintAt(pi, savedDist);
     }
 }
 
 void KisPainter::fillPolygon(const vQPointF& points, FillStyle fillStyle)
 {
     if (points.count() < 3) {
         return;
     }
 
     if (fillStyle == FillStyleNone) {
         return;
     }
 
     QPainterPath polygonPath;
 
     polygonPath.moveTo(points.at(0));
 
     for (int pointIndex = 1; pointIndex < points.count(); pointIndex++) {
         polygonPath.lineTo(points.at(pointIndex));
     }
 
     polygonPath.closeSubpath();
 
     d->fillStyle = fillStyle;
     fillPainterPath(polygonPath);
 }
 
 void KisPainter::paintPolygon(const vQPointF& points)
 {
     if (d->fillStyle != FillStyleNone) {
         fillPolygon(points, d->fillStyle);
     }
 
     if (d->strokeStyle != StrokeStyleNone) {
         if (points.count() > 1) {
             KisDistanceInformation distance;
 
             for (int i = 0; i < points.count() - 1; i++) {
                 paintLine(KisPaintInformation(points[i]), KisPaintInformation(points[i + 1]), &distance);
             }
             paintLine(points[points.count() - 1], points[0], &distance);
         }
     }
 }
 
 void KisPainter::paintPainterPath(const QPainterPath& path)
 {
     if (d->fillStyle != FillStyleNone) {
         fillPainterPath(path);
     }
 
     if (d->strokeStyle == StrokeStyleNone) return;
 
     QPointF lastPoint, nextPoint;
     int elementCount = path.elementCount();
     KisDistanceInformation saveDist;
     for (int i = 0; i < elementCount; i++) {
         QPainterPath::Element element = path.elementAt(i);
         switch (element.type) {
         case QPainterPath::MoveToElement:
             lastPoint =  QPointF(element.x, element.y);
             break;
         case QPainterPath::LineToElement:
             nextPoint =  QPointF(element.x, element.y);
             paintLine(KisPaintInformation(lastPoint), KisPaintInformation(nextPoint), &saveDist);
             lastPoint = nextPoint;
             break;
         case QPainterPath::CurveToElement:
             nextPoint =  QPointF(path.elementAt(i + 2).x, path.elementAt(i + 2).y);
             paintBezierCurve(KisPaintInformation(lastPoint),
                              QPointF(path.elementAt(i).x, path.elementAt(i).y),
                              QPointF(path.elementAt(i + 1).x, path.elementAt(i + 1).y),
                              KisPaintInformation(nextPoint), &saveDist);
             lastPoint = nextPoint;
             break;
         default:
             continue;
         }
     }
 }
 
 void KisPainter::fillPainterPath(const QPainterPath& path)
 {
     fillPainterPath(path, QRect());
 }
 
 void KisPainter::fillPainterPath(const QPainterPath& path, const QRect &requestedRect)
 {
     if (d->mirrorHorizontally || d->mirrorVertically) {
         KisLodTransform lod(d->device);
         QPointF effectiveAxesCenter = lod.map(d->axesCenter);
 
         QTransform C1 = QTransform::fromTranslate(-effectiveAxesCenter.x(), -effectiveAxesCenter.y());
         QTransform C2 = QTransform::fromTranslate(effectiveAxesCenter.x(), effectiveAxesCenter.y());
 
         QTransform t;
         QPainterPath newPath;
         QRect newRect;
 
         if (d->mirrorHorizontally) {
             t = C1 * QTransform::fromScale(-1,1) * C2;
             newPath = t.map(path);
             newRect = t.mapRect(requestedRect);
             d->fillPainterPathImpl(newPath, newRect);
         }
 
         if (d->mirrorVertically) {
             t = C1 * QTransform::fromScale(1,-1) * C2;
             newPath = t.map(path);
             newRect = t.mapRect(requestedRect);
             d->fillPainterPathImpl(newPath, newRect);
         }
 
         if (d->mirrorHorizontally && d->mirrorVertically) {
             t = C1 * QTransform::fromScale(-1,-1) * C2;
             newPath = t.map(path);
             newRect = t.mapRect(requestedRect);
             d->fillPainterPathImpl(newPath, newRect);
         }
     }
 
     d->fillPainterPathImpl(path, requestedRect);
 }
 
 void KisPainter::Private::fillPainterPathImpl(const QPainterPath& path, const QRect &requestedRect)
 {
     if (fillStyle == FillStyleNone) {
         return;
     }
 
     // Fill the polygon bounding rectangle with the required contents then we'll
     // create a mask for the actual polygon coverage.
 
     if (!fillPainter) {
         polygon = device->createCompositionSourceDevice();
         fillPainter = new KisFillPainter(polygon);
     } else {
         polygon->clear();
     }
 
     Q_CHECK_PTR(polygon);
 
     QRectF boundingRect = path.boundingRect();
     QRect fillRect = boundingRect.toAlignedRect();
 
     // Expand the rectangle to allow for anti-aliasing.
     fillRect.adjust(-1, -1, 1, 1);
 
     if (requestedRect.isValid()) {
         fillRect &= requestedRect;
     }
 
     switch (fillStyle) {
     default:
         // Fall through
     case FillStyleGradient:
         // Currently unsupported, fall through
     case FillStyleStrokes:
         // Currently unsupported, fall through
         warnImage << "Unknown or unsupported fill style in fillPolygon\n";
     case FillStyleForegroundColor:
         fillPainter->fillRect(fillRect, q->paintColor(), OPACITY_OPAQUE_U8);
         break;
     case FillStyleBackgroundColor:
         fillPainter->fillRect(fillRect, q->backgroundColor(), OPACITY_OPAQUE_U8);
         break;
     case FillStylePattern:
         if (pattern) { // if the user hasn't got any patterns installed, we shouldn't crash...
             fillPainter->fillRect(fillRect, pattern);
         }
         break;
     case FillStyleGenerator:
         if (generator) { // if the user hasn't got any generators, we shouldn't crash...
             fillPainter->fillRect(fillRect.x(), fillRect.y(), fillRect.width(), fillRect.height(), q->generator());
         }
         break;
     }
 
     if (polygonMaskImage.isNull() || (maskPainter == 0)) {
         polygonMaskImage = QImage(maskImageWidth, maskImageHeight, QImage::Format_ARGB32_Premultiplied);
         maskPainter = new QPainter(&polygonMaskImage);
         maskPainter->setRenderHint(QPainter::Antialiasing, q->antiAliasPolygonFill());
     }
 
     // Break the mask up into chunks so we don't have to allocate a potentially very large QImage.
     const QColor black(Qt::black);
     const QBrush brush(Qt::white);
     for (qint32 x = fillRect.x(); x < fillRect.x() + fillRect.width(); x += maskImageWidth) {
         for (qint32 y = fillRect.y(); y < fillRect.y() + fillRect.height(); y += maskImageHeight) {
 
             polygonMaskImage.fill(black.rgb());
             maskPainter->translate(-x, -y);
             maskPainter->fillPath(path, brush);
             maskPainter->translate(x, y);
 
             qint32 rectWidth = qMin(fillRect.x() + fillRect.width() - x, maskImageWidth);
             qint32 rectHeight = qMin(fillRect.y() + fillRect.height() - y, maskImageHeight);
 
             KisHLineIteratorSP lineIt = polygon->createHLineIteratorNG(x, y, rectWidth);
 
             quint8 tmp;
             for (int row = y; row < y + rectHeight; row++) {
                 QRgb* line = reinterpret_cast<QRgb*>(polygonMaskImage.scanLine(row - y));
                 do {
                     tmp = qRed(line[lineIt->x() - x]);
                     polygon->colorSpace()->applyAlphaU8Mask(lineIt->rawData(), &tmp, 1);
                 } while (lineIt->nextPixel());
                 lineIt->nextRow();
             }
 
         }
     }
 
     QRect bltRect = !requestedRect.isEmpty() ? requestedRect : fillRect;
     q->bitBlt(bltRect.x(), bltRect.y(), polygon, bltRect.x(), bltRect.y(), bltRect.width(), bltRect.height());
 }
 
 void KisPainter::drawPainterPath(const QPainterPath& path, const QPen& pen)
 {
     drawPainterPath(path, pen, QRect());
 }
 
 void KisPainter::drawPainterPath(const QPainterPath& path, const QPen& pen, const QRect &requestedRect)
 {
     // we are drawing mask, it has to be white
     // color of the path is given by paintColor()
     Q_ASSERT(pen.color() == Qt::white);
 
     if (!d->fillPainter) {
         d->polygon = d->device->createCompositionSourceDevice();
         d->fillPainter = new KisFillPainter(d->polygon);
     } else {
         d->polygon->clear();
     }
 
     Q_CHECK_PTR(d->polygon);
 
     QRectF boundingRect = path.boundingRect();
     QRect fillRect = boundingRect.toAlignedRect();
 
     // take width of the pen into account
     int penWidth = qRound(pen.widthF());
     fillRect.adjust(-penWidth, -penWidth, penWidth, penWidth);
 
     // Expand the rectangle to allow for anti-aliasing.
     fillRect.adjust(-1, -1, 1, 1);
 
     if (!requestedRect.isNull()) {
         fillRect &= requestedRect;
     }
 
     d->fillPainter->fillRect(fillRect, paintColor(), OPACITY_OPAQUE_U8);
 
     if (d->polygonMaskImage.isNull() || (d->maskPainter == 0)) {
         d->polygonMaskImage = QImage(d->maskImageWidth, d->maskImageHeight, QImage::Format_ARGB32_Premultiplied);
         d->maskPainter = new QPainter(&d->polygonMaskImage);
         d->maskPainter->setRenderHint(QPainter::Antialiasing, antiAliasPolygonFill());
     }
 
     // Break the mask up into chunks so we don't have to allocate a potentially very large QImage.
     const QColor black(Qt::black);
     QPen oldPen = d->maskPainter->pen();
     d->maskPainter->setPen(pen);
 
     for (qint32 x = fillRect.x(); x < fillRect.x() + fillRect.width(); x += d->maskImageWidth) {
         for (qint32 y = fillRect.y(); y < fillRect.y() + fillRect.height(); y += d->maskImageHeight) {
 
             d->polygonMaskImage.fill(black.rgb());
             d->maskPainter->translate(-x, -y);
             d->maskPainter->drawPath(path);
             d->maskPainter->translate(x, y);
 
             qint32 rectWidth = qMin(fillRect.x() + fillRect.width() - x, d->maskImageWidth);
             qint32 rectHeight = qMin(fillRect.y() + fillRect.height() - y, d->maskImageHeight);
 
             KisHLineIteratorSP lineIt = d->polygon->createHLineIteratorNG(x, y, rectWidth);
 
             quint8 tmp;
             for (int row = y; row < y + rectHeight; row++) {
                 QRgb* line = reinterpret_cast<QRgb*>(d->polygonMaskImage.scanLine(row - y));
                 do {
                     tmp = qRed(line[lineIt->x() - x]);
                     d->polygon->colorSpace()->applyAlphaU8Mask(lineIt->rawData(), &tmp, 1);
                 } while (lineIt->nextPixel());
                 lineIt->nextRow();
             }
 
         }
     }
 
     d->maskPainter->setPen(oldPen);
     QRect r = d->polygon->extent();
 
     bitBlt(r.x(), r.y(), d->polygon, r.x(), r.y(), r.width(), r.height());
 }
 
 inline void KisPainter::compositeOnePixel(quint8 *dst, const KoColor &color)
 {
     d->paramInfo.dstRowStart = dst;
     d->paramInfo.dstRowStride = 0;
     d->paramInfo.srcRowStart = color.data();
     d->paramInfo.srcRowStride = 0;
     d->paramInfo.maskRowStart = 0;
     d->paramInfo.maskRowStride = 0;
     d->paramInfo.rows = 1;
     d->paramInfo.cols = 1;
 
     d->colorSpace->bitBlt(color.colorSpace(), d->paramInfo, d->compositeOp,
                           d->renderingIntent,
                           d->conversionFlags);
 }
 
 /**/
 void KisPainter::drawLine(const QPointF& start, const QPointF& end, qreal width, bool antialias){
     int x1 = start.x();
     int y1 = start.y();
     int x2 = end.x();
     int y2 = end.y();
 
     if ((x2 == x1 ) && (y2 == y1)) return;
 
     int dstX = x2-x1;
     int dstY = y2-y1;
 
     qreal uniC = dstX*y1 - dstY*x1;
     qreal projectionDenominator = 1.0 / (pow((double)dstX, 2) + pow((double)dstY, 2));
 
     qreal subPixel;
     if (qAbs(dstX) > qAbs(dstY)){
         subPixel = start.x() - x1;
     }else{
         subPixel = start.y() - y1;
     }
 
     qreal halfWidth = width * 0.5 + subPixel;
     int W_ = qRound(halfWidth) + 1;
 
     // save the state
     int X1_ = x1;
     int Y1_ = y1;
     int X2_ = x2;
     int Y2_ = y2;
 
     if (x2<x1) qSwap(x1,x2);
     if (y2<y1) qSwap(y1,y2);
 
     qreal denominator = sqrt(pow((double)dstY,2) + pow((double)dstX,2));
     if (denominator == 0.0) {
         denominator = 1.0;
     }
     denominator = 1.0/denominator;
 
     qreal projection,scanX,scanY,AA_;
     KisRandomAccessorSP accessor = d->device->createRandomAccessorNG(x1, y1);
     KisRandomConstAccessorSP selectionAccessor;
     if (d->selection) {
         selectionAccessor = d->selection->projection()->createRandomConstAccessorNG(x1, y1);
     }
 
     for (int y = y1-W_; y < y2+W_ ; y++){
         for (int x = x1-W_; x < x2+W_; x++){
 
             projection = ( (x-X1_)* dstX + (y-Y1_)*dstY ) * projectionDenominator;
             scanX = X1_ + projection * dstX;
             scanY = Y1_ + projection * dstY;
 
             if (((scanX < x1) || (scanX > x2)) || ((scanY < y1) || (scanY > y2))) {
                 AA_ = qMin( sqrt( pow((double)x - X1_, 2) + pow((double)y - Y1_, 2) ),
                             sqrt( pow((double)x - X2_, 2) + pow((double)y - Y2_, 2) ));
             }else{
                 AA_ = qAbs(dstY*x - dstX*y + uniC) * denominator;
             }
 
             if (AA_>halfWidth) {
                 continue;
             }
 
             accessor->moveTo(x, y);
             if (selectionAccessor) selectionAccessor->moveTo(x,y);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 KoColor mycolor = d->paintColor;
 
                 if (antialias && AA_ > halfWidth-1.0) {
                     mycolor.colorSpace()->multiplyAlpha(mycolor.data(), 1.0 - (AA_-(halfWidth-1.0)), 1);
                 }
 
                 compositeOnePixel(accessor->rawData(), mycolor);
             }
         }
     }
 }
 
 /**/
 
 void KisPainter::drawLine(const QPointF & start, const QPointF & end)
 {
     drawThickLine(start, end, 1, 1);
 }
 
 
 void KisPainter::drawDDALine(const QPointF & start, const QPointF & end)
 {
     int x = int(start.x());
     int y = int(start.y());
 
     int x2 = int(end.x());
     int y2 = int(end.y());
 
     // Width and height of the line
     int xd = x2 - x;
     int yd = y2 - y;
 
     float m = (float)yd / (float)xd;
 
     float fx = x;
     float fy = y;
     int inc;
 
     KisRandomAccessorSP accessor = d->device->createRandomAccessorNG(x, y);
     KisRandomConstAccessorSP selectionAccessor;
     if (d->selection) {
         selectionAccessor = d->selection->projection()->createRandomConstAccessorNG(x, y);
     }
 
 
     accessor->moveTo(x, y);
     if (selectionAccessor) selectionAccessor->moveTo(x,y);
 
     if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
         compositeOnePixel(accessor->rawData(), d->paintColor);
     }
 
     if (fabs(m) > 1.0f) {
         inc = (yd > 0) ? 1 : -1;
         m = 1.0f / m;
         m *= inc;
         while (y != y2) {
             y = y + inc;
             fx = fx + m;
             x = qRound(fx);
 
             accessor->moveTo(x, y);
             if (selectionAccessor) selectionAccessor->moveTo(x, y);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 compositeOnePixel(accessor->rawData(), d->paintColor);
             }
         }
     } else {
         inc = (xd > 0) ? 1 : -1;
         m *= inc;
         while (x != x2) {
             x = x + inc;
             fy = fy + m;
             y = qRound(fy);
 
             accessor->moveTo(x, y);
             if (selectionAccessor) selectionAccessor->moveTo(x, y);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 compositeOnePixel(accessor->rawData(), d->paintColor);
             }
         }
     }
 }
 
 void KisPainter::drawWobblyLine(const QPointF & start, const QPointF & end)
 {
     KisRandomAccessorSP accessor = d->device->createRandomAccessorNG(start.x(), start.y());
     KisRandomConstAccessorSP selectionAccessor;
     if (d->selection) {
         selectionAccessor = d->selection->projection()->createRandomConstAccessorNG(start.x(), start.y());
     }
 
     KoColor mycolor(d->paintColor);
 
     int x1 = start.x();
     int y1 = start.y();
     int x2 = end.x();
     int y2 = end.y();
 
     // Width and height of the line
     int xd = (x2 - x1);
     int yd = (y2 - y1);
 
     int x;
     int y;
     float fx = (x = x1);
     float fy = (y = y1);
     float m = (float)yd / (float)xd;
     int inc;
 
     if (fabs(m) > 1) {
         inc = (yd > 0) ? 1 : -1;
         m = 1.0f / m;
         m *= inc;
         while (y != y2) {
             fx = fx + m;
             y = y + inc;
             x = qRound(fx);
 
             float br1 = int(fx + 1) - fx;
             float br2 = fx - (int)fx;
 
             accessor->moveTo(x, y);
             if (selectionAccessor) selectionAccessor->moveTo(x, y);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 mycolor.setOpacity((quint8)(255*br1));
                 compositeOnePixel(accessor->rawData(), mycolor);
             }
 
             accessor->moveTo(x + 1, y);
             if (selectionAccessor) selectionAccessor->moveTo(x + 1, y);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 mycolor.setOpacity((quint8)(255*br2));
                 compositeOnePixel(accessor->rawData(), mycolor);
             }
         }
     } else {
         inc = (xd > 0) ? 1 : -1;
         m *= inc;
         while (x != x2) {
             fy = fy + m;
             x = x + inc;
             y = qRound(fy);
 
             float br1 = int(fy + 1) - fy;
             float br2 = fy - (int)fy;
 
             accessor->moveTo(x, y);
             if (selectionAccessor) selectionAccessor->moveTo(x, y);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 mycolor.setOpacity((quint8)(255*br1));
                 compositeOnePixel(accessor->rawData(), mycolor);
             }
 
             accessor->moveTo(x, y + 1);
             if (selectionAccessor) selectionAccessor->moveTo(x, y + 1);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 mycolor.setOpacity((quint8)(255*br2));
                 compositeOnePixel(accessor->rawData(), mycolor);
             }
         }
     }
 
 }
 
 void KisPainter::drawWuLine(const QPointF & start, const QPointF & end)
 {
     KisRandomAccessorSP accessor = d->device->createRandomAccessorNG(start.x(), start.y());
     KisRandomConstAccessorSP selectionAccessor;
     if (d->selection) {
         selectionAccessor = d->selection->projection()->createRandomConstAccessorNG(start.x(), start.y());
     }
 
     KoColor lineColor(d->paintColor);
 
     int x1 = start.x();
     int y1 = start.y();
     int x2 = end.x();
     int y2 = end.y();
 
 
     float grad, xd, yd;
     float xgap, ygap, xend, yend, yf, xf;
     float brightness1, brightness2;
 
     int ix1, ix2, iy1, iy2;
     quint8 c1, c2;
 
     // gradient of line
     xd = (x2 - x1);
     yd = (y2 - y1);
 
     if (yd == 0) {
         /* Horizontal line */
         int incr = (x1 < x2) ? 1 : -1;
         ix1 = (int)x1;
         ix2 = (int)x2;
         iy1 = (int)y1;
         while (ix1 != ix2) {
             ix1 = ix1 + incr;
 
             accessor->moveTo(ix1, iy1);
             if (selectionAccessor) selectionAccessor->moveTo(ix1, iy1);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 compositeOnePixel(accessor->rawData(), lineColor);
             }
         }
         return;
     }
 
     if (xd == 0) {
         /* Vertical line */
         int incr = (y1 < y2) ? 1 : -1;
         iy1 = (int)y1;
         iy2 = (int)y2;
         ix1 = (int)x1;
         while (iy1 != iy2) {
             iy1 = iy1 + incr;
 
             accessor->moveTo(ix1, iy1);
             if (selectionAccessor) selectionAccessor->moveTo(ix1, iy1);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 compositeOnePixel(accessor->rawData(), lineColor);
             }
         }
         return;
     }
 
     if (fabs(xd) > fabs(yd)) {
         // horizontal line
         // line have to be paint from left to right
         if (x1 > x2) {
             float tmp;
             tmp = x1; x1 = x2; x2 = tmp;
             tmp = y1; y1 = y2; y2 = tmp;
             xd = (x2 - x1);
             yd = (y2 - y1);
         }
         grad = yd / xd;
         // nearest X,Y interger coordinates
         xend = static_cast<int>(x1 + 0.5f);
         yend = y1 + grad * (xend - x1);
 
         xgap = invertFrac(x1 + 0.5f);
 
         ix1 = static_cast<int>(xend);
         iy1 = static_cast<int>(yend);
 
         // calc the intensity of the other end point pixel pair.
         brightness1 = invertFrac(yend) * xgap;
         brightness2 =       frac(yend) * xgap;
 
         c1 = (int)(brightness1 * OPACITY_OPAQUE_U8);
         c2 = (int)(brightness2 * OPACITY_OPAQUE_U8);
 
         accessor->moveTo(ix1, iy1);
         if (selectionAccessor) selectionAccessor->moveTo(ix1, iy1);
 
         if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
             lineColor.setOpacity(c1);
             compositeOnePixel(accessor->rawData(), lineColor);
         }
 
         accessor->moveTo(ix1, iy1 + 1);
         if (selectionAccessor) selectionAccessor->moveTo(ix1, iy1 + 1);
 
         if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
             lineColor.setOpacity(c2);
             compositeOnePixel(accessor->rawData(), lineColor);
         }
 
         // calc first Y-intersection for main loop
         yf = yend + grad;
 
         xend = trunc(x2 + 0.5f);
         yend = y2 + grad * (xend - x2);
 
         xgap = invertFrac(x2 - 0.5f);
 
         ix2 = static_cast<int>(xend);
         iy2 = static_cast<int>(yend);
 
         brightness1 = invertFrac(yend) * xgap;
         brightness2 =    frac(yend) * xgap;
 
         c1 = (int)(brightness1 * OPACITY_OPAQUE_U8);
         c2 = (int)(brightness2 * OPACITY_OPAQUE_U8);
 
         accessor->moveTo(ix2, iy2);
         if (selectionAccessor) selectionAccessor->moveTo(ix2, iy2);
 
         if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
             lineColor.setOpacity(c1);
             compositeOnePixel(accessor->rawData(), lineColor);
         }
 
         accessor->moveTo(ix2, iy2 + 1);
         if (selectionAccessor) selectionAccessor->moveTo(ix2, iy2 + 1);
 
         if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
             lineColor.setOpacity(c2);
             compositeOnePixel(accessor->rawData(), lineColor);
         }
 
         // main loop
         for (int x = ix1 + 1; x <= ix2 - 1; x++) {
             brightness1 = invertFrac(yf);
             brightness2 =    frac(yf);
             c1 = (int)(brightness1 * OPACITY_OPAQUE_U8);
             c2 = (int)(brightness2 * OPACITY_OPAQUE_U8);
 
             accessor->moveTo(x, int (yf));
             if (selectionAccessor) selectionAccessor->moveTo(x, int (yf));
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 lineColor.setOpacity(c1);
                 compositeOnePixel(accessor->rawData(), lineColor);
             }
 
             accessor->moveTo(x, int (yf) + 1);
             if (selectionAccessor) selectionAccessor->moveTo(x, int (yf) + 1);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 lineColor.setOpacity(c2);
                 compositeOnePixel(accessor->rawData(), lineColor);
             }
 
             yf = yf + grad;
         }
     } else {
         //vertical
         // line have to be painted from left to right
         if (y1 > y2) {
             float tmp;
             tmp = x1; x1 = x2; x2 = tmp;
             tmp = y1; y1 = y2; y2 = tmp;
             xd = (x2 - x1);
             yd = (y2 - y1);
         }
 
         grad = xd / yd;
 
         // nearest X,Y interger coordinates
         yend = static_cast<int>(y1 + 0.5f);
         xend = x1 + grad * (yend - y1);
 
         ygap = invertFrac(y1 + 0.5f);
 
         ix1 = static_cast<int>(xend);
         iy1 = static_cast<int>(yend);
 
         // calc the intensity of the other end point pixel pair.
         brightness1 = invertFrac(xend) * ygap;
         brightness2 =       frac(xend) * ygap;
 
         c1 = (int)(brightness1 * OPACITY_OPAQUE_U8);
         c2 = (int)(brightness2 * OPACITY_OPAQUE_U8);
 
         accessor->moveTo(ix1, iy1);
         if (selectionAccessor) selectionAccessor->moveTo(ix1, iy1);
 
         if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
             lineColor.setOpacity(c1);
             compositeOnePixel(accessor->rawData(), lineColor);
         }
 
         accessor->moveTo(x1 + 1, y1);
         if (selectionAccessor) selectionAccessor->moveTo(x1 + 1, y1);
 
         if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
             lineColor.setOpacity(c2);
             compositeOnePixel(accessor->rawData(), lineColor);
         }
 
         // calc first Y-intersection for main loop
         xf = xend + grad;
 
         yend = trunc(y2 + 0.5f);
         xend = x2 + grad * (yend - y2);
 
         ygap = invertFrac(y2 - 0.5f);
 
         ix2 = static_cast<int>(xend);
         iy2 = static_cast<int>(yend);
 
         brightness1 = invertFrac(xend) * ygap;
         brightness2 =    frac(xend) * ygap;
 
         c1 = (int)(brightness1 * OPACITY_OPAQUE_U8);
         c2 = (int)(brightness2 * OPACITY_OPAQUE_U8);
 
         accessor->moveTo(ix2, iy2);
         if (selectionAccessor) selectionAccessor->moveTo(ix2, iy2);
 
         if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
             lineColor.setOpacity(c1);
             compositeOnePixel(accessor->rawData(), lineColor);
         }
 
         accessor->moveTo(ix2 + 1, iy2);
         if (selectionAccessor) selectionAccessor->moveTo(ix2 + 1, iy2);
 
         if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
             lineColor.setOpacity(c2);
             compositeOnePixel(accessor->rawData(), lineColor);
         }
 
         // main loop
         for (int y = iy1 + 1; y <= iy2 - 1; y++) {
             brightness1 = invertFrac(xf);
             brightness2 =    frac(xf);
             c1 = (int)(brightness1 * OPACITY_OPAQUE_U8);
             c2 = (int)(brightness2 * OPACITY_OPAQUE_U8);
 
             accessor->moveTo(int (xf), y);
             if (selectionAccessor) selectionAccessor->moveTo(int (xf), y);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 lineColor.setOpacity(c1);
                 compositeOnePixel(accessor->rawData(), lineColor);
             }
 
             accessor->moveTo(int (xf) + 1, y);
             if (selectionAccessor) selectionAccessor->moveTo(int (xf) + 1, y);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 lineColor.setOpacity(c2);
                 compositeOnePixel(accessor->rawData(), lineColor);
             }
 
             xf = xf + grad;
         }
     }//end-of-else
 
 }
 
 void KisPainter::drawThickLine(const QPointF & start, const QPointF & end, int startWidth, int endWidth)
 {
 
     KisRandomAccessorSP accessor = d->device->createRandomAccessorNG(start.x(), start.y());
     KisRandomConstAccessorSP selectionAccessor;
     if (d->selection) {
         selectionAccessor = d->selection->projection()->createRandomConstAccessorNG(start.x(), start.y());
     }
 
     const KoColorSpace *cs = d->device->colorSpace();
 
     KoColor c1(d->paintColor);
     KoColor c2(d->paintColor);
     KoColor c3(d->paintColor);
     KoColor col1(c1);
     KoColor col2(c1);
 
     float grada, gradb, dxa, dxb, dya, dyb, fraca, fracb,
     xfa, yfa, xfb, yfb, b1a, b2a, b1b, b2b, dstX, dstY;
     int x, y, ix1, ix2, iy1, iy2;
 
     int x0a, y0a, x1a, y1a, x0b, y0b, x1b, y1b;
     int tp0, tn0, tp1, tn1;
 
     int horizontal = 0;
     float opacity = 1.0;
 
     tp0 = startWidth / 2;
     tn0 = startWidth / 2;
     if (startWidth % 2 == 0) // even width startWidth
         tn0--;
 
     tp1 = endWidth / 2;
     tn1 = endWidth / 2;
     if (endWidth % 2 == 0) // even width endWidth
         tn1--;
 
     int x0 = qRound(start.x());
     int y0 = qRound(start.y());
     int x1 = qRound(end.x());
     int y1 = qRound(end.y());
 
     dstX = x1 - x0; // run of general line
     dstY = y1 - y0; // rise of general line
 
     if (dstY < 0) dstY = -dstY;
     if (dstX < 0) dstX = -dstX;
 
     if (dstX > dstY) { // horizontalish
         horizontal = 1;
         x0a = x0;   y0a = y0 - tn0;
         x0b = x0;   y0b = y0 + tp0;
         x1a = x1;   y1a = y1 - tn1;
         x1b = x1;   y1b = y1 + tp1;
     } else {
         x0a = x0 - tn0;   y0a = y0;
         x0b = x0 + tp0;   y0b = y0;
         x1a = x1 - tn1;   y1a = y1;
         x1b = x1 + tp1;   y1b = y1;
     }
 
     if (horizontal) { // draw endpoints
         for (int i = y0a; i <= y0b; i++) {
 
             accessor->moveTo(x0, i);
             if (selectionAccessor) selectionAccessor->moveTo(x0, i);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 compositeOnePixel(accessor->rawData(), c1);
             }
         }
         for (int i = y1a; i <= y1b; i++) {
 
             accessor->moveTo(x1, i);
             if (selectionAccessor) selectionAccessor->moveTo(x1, i);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 compositeOnePixel(accessor->rawData(), c1);
             }
         }
 
     } else {
         for (int i = x0a; i <= x0b; i++) {
 
             accessor->moveTo(i, y0);
             if (selectionAccessor) selectionAccessor->moveTo(i, y0);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 compositeOnePixel(accessor->rawData(), c1);
             }
         }
         for (int i = x1a; i <= x1b; i++) {
             accessor->moveTo(i, y1);
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 compositeOnePixel(accessor->rawData(), c1);
             }
         }
     }
 
     //antialias endpoints
     if (x1 != x0 && y1 != y0) {
         if (horizontal) {
 
             accessor->moveTo(x0a, y0a - 1);
             if (selectionAccessor) selectionAccessor->moveTo(x0a, y0a - 1);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 qreal alpha = cs->opacityF(accessor->rawData());
                 opacity = .25 * c1.opacityF() + (1 - .25) * alpha;
                 col1.setOpacity(opacity);
                 compositeOnePixel(accessor->rawData(), col1);
             }
 
             accessor->moveTo(x1b, y1b + 1);
             if (selectionAccessor) selectionAccessor->moveTo(x1b, y1b + 1);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 qreal alpha = cs->opacityF(accessor->rawData());
                 opacity = .25 * c2.opacityF() + (1 - .25) * alpha;
                 col1.setOpacity(opacity);
                 compositeOnePixel(accessor->rawData(), col1);
             }
 
         } else {
 
             accessor->moveTo(x0a - 1, y0a);
             if (selectionAccessor) selectionAccessor->moveTo(x0a - 1, y0a);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 qreal alpha = cs->opacityF(accessor->rawData());
                 opacity = .25 * c1.opacityF() + (1 - .25) * alpha;
                 col1.setOpacity(opacity);
                 compositeOnePixel(accessor->rawData(), col1);
             }
 
             accessor->moveTo(x1b + 1, y1b);
             if (selectionAccessor) selectionAccessor->moveTo(x1b + 1, y1b);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 qreal alpha = cs->opacityF(accessor->rawData());
                 opacity = .25 * c2.opacityF() + (1 - .25) * alpha;
                 col1.setOpacity(opacity);
                 compositeOnePixel(accessor->rawData(), col1);
             }
         }
     }
 
     dxa = x1a - x0a; // run of a
     dya = y1a - y0a; // rise of a
     dxb = x1b - x0b; // run of b
     dyb = y1b - y0b; // rise of b
 
     if (horizontal) { // horizontal-ish lines
         if (x1 < x0) {
             int xt, yt, wt;
             KoColor tmp;
             xt = x1a;     x1a = x0a;    x0a = xt;
             yt = y1a;     y1a = y0a;    y0a = yt;
             xt = x1b;     x1b = x0b;    x0b = xt;
             yt = y1b;     y1b = y0b;    y0b = yt;
             xt = x1;      x1 = x0;      x0 = xt;
             yt = y1;      y1 = y0;      y0 = yt;
 
             tmp = c1; c1 = c2; c2 = tmp;
             wt = startWidth;      startWidth = endWidth;      endWidth = wt;
         }
 
         grada = dya / dxa;
         gradb = dyb / dxb;
 
         ix1 = x0;   iy1 = y0;
         ix2 = x1;   iy2 = y1;
 
         yfa = y0a + grada;
         yfb = y0b + gradb;
 
         for (x = ix1 + 1; x <= ix2 - 1; x++) {
             fraca = yfa - int (yfa);
             b1a = 1 - fraca;
             b2a = fraca;
 
             fracb = yfb - int (yfb);
             b1b = 1 - fracb;
             b2b = fracb;
 
             // color first pixel of bottom line
             opacity = ((x - ix1) / dstX) * c2.opacityF() + (1 - (x - ix1) / dstX) * c1.opacityF();
             c3.setOpacity(opacity);
 
             accessor->moveTo(x, (int)yfa);
             if (selectionAccessor) selectionAccessor->moveTo(x, (int)yfa);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 qreal alpha = cs->opacityF(accessor->rawData());
                 opacity = b1a * c3.opacityF() + (1 - b1a) * alpha;
                 col1.setOpacity(opacity);
                 compositeOnePixel(accessor->rawData(), col1);
             }
 
             // color first pixel of top line
             if (!(startWidth == 1 && endWidth == 1)) {
                 accessor->moveTo(x, (int)yfb);
                 if (selectionAccessor) selectionAccessor->moveTo(x, (int)yfb);
 
                 if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                     qreal alpha = cs->opacityF(accessor->rawData());
                     opacity = b1b * c3.opacityF() + (1 - b1b) * alpha;
                     col1.setOpacity(opacity);
                     compositeOnePixel(accessor->rawData(), col1);
                 }
             }
 
             // color second pixel of bottom line
             if (grada != 0 && grada != 1) { // if not flat or exact diagonal
 
                 accessor->moveTo(x, int (yfa) + 1);
                 if (selectionAccessor) selectionAccessor->moveTo(x, int (yfa) + 1);
 
                 if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                     qreal alpha = cs->opacityF(accessor->rawData());
                     opacity = b2a * c3.opacityF() + (1 - b2a)  * alpha;
                     col2.setOpacity(opacity);
                     compositeOnePixel(accessor->rawData(), col2);
                 }
 
             }
 
             // color second pixel of top line
             if (gradb != 0 && gradb != 1 && !(startWidth == 1 && endWidth == 1)) {
 
                 accessor->moveTo(x, int (yfb) + 1);
                 if (selectionAccessor) selectionAccessor->moveTo(x, int (yfb) + 1);
 
                 if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                     qreal alpha = cs->opacityF(accessor->rawData());
                     opacity = b2b * c3.opacityF() + (1 - b2b) * alpha;
                     col2.setOpacity(opacity);
                     compositeOnePixel(accessor->rawData(), col2);
                 }
 
             }
 
             // fill remaining pixels
             if (!(startWidth == 1 && endWidth == 1)) {
                 if (yfa < yfb)
                     for (int i = yfa + 1; i <= yfb; i++) {
 
                         accessor->moveTo(x, i);
                         if (selectionAccessor) selectionAccessor->moveTo(x, i);
 
                         if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                             compositeOnePixel(accessor->rawData(), c3);
                         }
                     }
                 else
                     for (int i = yfa + 1; i >= yfb; i--) {
 
                         accessor->moveTo(x, i);
                         if (selectionAccessor) selectionAccessor->moveTo(x, i);
 
                         if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                             compositeOnePixel(accessor->rawData(), c3);
                         }
                     }
 
             }
 
             yfa += grada;
             yfb += gradb;
         }
     } else { // vertical-ish lines
         if (y1 < y0) {
             int xt, yt, wt;
             xt = x1a;     x1a = x0a;    x0a = xt;
             yt = y1a;     y1a = y0a;    y0a = yt;
             xt = x1b;     x1b = x0b;    x0b = xt;
             yt = y1b;     y1b = y0b;    y0b = yt;
             xt = x1;      x1 = x0;      x0 = xt;
             yt = y1;      y1 = y0;      y0 = yt;
 
             KoColor tmp;
             tmp = c1; c1 = c2; c2 = tmp;
             wt = startWidth;      startWidth = endWidth;      endWidth = wt;
         }
 
         grada = dxa / dya;
         gradb = dxb / dyb;
 
         ix1 = x0;   iy1 = y0;
         ix2 = x1;   iy2 = y1;
 
         xfa = x0a + grada;
         xfb = x0b + gradb;
 
         for (y = iy1 + 1; y <= iy2 - 1; y++) {
             fraca = xfa - int (xfa);
             b1a = 1 - fraca;
             b2a = fraca;
 
             fracb = xfb - int (xfb);
             b1b = 1 - fracb;
             b2b = fracb;
 
             // color first pixel of left line
             opacity = ((y - iy1) / dstY) * c2.opacityF() + (1 - (y - iy1) / dstY) * c1.opacityF();
             c3.setOpacity(opacity);
 
             accessor->moveTo(int (xfa), y);
             if (selectionAccessor) selectionAccessor->moveTo(int (xfa), y);
 
             if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                 qreal alpha = cs->opacityF(accessor->rawData());
                 opacity = b1a * c3.opacityF() + (1 - b1a) * alpha;
                 col1.setOpacity(opacity);
                 compositeOnePixel(accessor->rawData(), col1);
             }
 
             // color first pixel of right line
             if (!(startWidth == 1 && endWidth == 1)) {
 
                 accessor->moveTo(int(xfb), y);
                 if (selectionAccessor) selectionAccessor->moveTo(int(xfb), y);
 
                 if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                     qreal alpha = cs->opacityF(accessor->rawData());
                     opacity = b1b * c3.opacityF() + (1 - b1b)  * alpha;
                     col1.setOpacity(opacity);
                     compositeOnePixel(accessor->rawData(), col1);
                 }
             }
 
             // color second pixel of left line
             if (grada != 0 && grada != 1) { // if not flat or exact diagonal
 
                 accessor->moveTo(int(xfa) + 1, y);
                 if (selectionAccessor) selectionAccessor->moveTo(int(xfa) + 1, y);
 
                 if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                     qreal alpha = cs->opacityF(accessor->rawData());
                     opacity = b2a * c3.opacityF() + (1 - b2a) * alpha;
                     col2.setOpacity(opacity);
                     compositeOnePixel(accessor->rawData(), col2);
                 }
 
             }
 
             // color second pixel of right line
             if (gradb != 0 && gradb != 1 && !(startWidth == 1 && endWidth == 1)) {
 
                 accessor->moveTo(int(xfb) + 1, y);
                 if (selectionAccessor) selectionAccessor->moveTo(int(xfb) + 1, y);
 
                 if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                     qreal alpha = cs->opacityF(accessor->rawData());
                     opacity = b2b * c3.opacityF() + (1 - b2b) * alpha;
                     col2.setOpacity(opacity);
                     compositeOnePixel(accessor->rawData(), col2);
                 }
             }
 
             // fill remaining pixels between current xfa,xfb
             if (!(startWidth == 1 && endWidth == 1)) {
                 if (xfa < xfb)
                     for (int i = (int) xfa + 1; i <= (int) xfb; i++) {
 
                         accessor->moveTo(i, y);
                         if (selectionAccessor) selectionAccessor->moveTo(i, y);
 
                         if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                             compositeOnePixel(accessor->rawData(), c3);
                         }
                     }
                 else
                     for (int i = (int) xfb; i <= (int) xfa + 1; i++) {
 
                         accessor->moveTo(i, y);
                         if (selectionAccessor) selectionAccessor->moveTo(i, y);
 
                         if (!selectionAccessor || *selectionAccessor->oldRawData() > SELECTION_THRESHOLD) {
                             compositeOnePixel(accessor->rawData(), c3);
                         }
                     }
             }
 
             xfa += grada;
             xfb += gradb;
         }
     }
 
 }
 
 
 
 void KisPainter::setProgress(KoUpdater * progressUpdater)
 {
     d->progressUpdater = progressUpdater;
 }
 
 const KisPaintDeviceSP KisPainter::device() const
 {
     return d->device;
 }
 KisPaintDeviceSP KisPainter::device()
 {
     return d->device;
 }
 
 void KisPainter::setChannelFlags(QBitArray channelFlags)
 {
     Q_ASSERT(channelFlags.isEmpty() || quint32(channelFlags.size()) == d->colorSpace->channelCount());
     // Now, if all bits in the channelflags are true, pass an empty channel flags bitarray
     // because otherwise the compositeops cannot optimize.
     d->paramInfo.channelFlags = channelFlags;
 
     if (!channelFlags.isEmpty() && channelFlags == QBitArray(channelFlags.size(), true)) {
         d->paramInfo.channelFlags = QBitArray();
     }
 }
 
 QBitArray KisPainter::channelFlags()
 {
     return d->paramInfo.channelFlags;
 }
 
 void KisPainter::setPattern(const KoPattern * pattern)
 {
     d->pattern = pattern;
 }
 
 const KoPattern * KisPainter::pattern() const
 {
     return d->pattern;
 }
 
 void KisPainter::setPaintColor(const KoColor& color)
 {
     d->paintColor = color;
     if (d->device) {
         d->paintColor.convertTo(d->device->compositionSourceColorSpace());
     }
 }
 
 const KoColor &KisPainter::paintColor() const
 {
     return d->paintColor;
 }
 
 void KisPainter::setBackgroundColor(const KoColor& color)
 {
     d->backgroundColor = color;
     if (d->device) {
         d->backgroundColor.convertTo(d->device->compositionSourceColorSpace());
     }
 }
 
 const KoColor &KisPainter::backgroundColor() const
 {
     return d->backgroundColor;
 }
 
 void KisPainter::setGenerator(KisFilterConfigurationSP  generator)
 {
     d->generator = generator;
 }
 
 const KisFilterConfigurationSP  KisPainter::generator() const
 {
     return d->generator;
 }
 
 void KisPainter::setFillStyle(FillStyle fillStyle)
 {
     d->fillStyle = fillStyle;
 }
 
 KisPainter::FillStyle KisPainter::fillStyle() const
 {
     return d->fillStyle;
 }
 
 void KisPainter::setAntiAliasPolygonFill(bool antiAliasPolygonFill)
 {
     d->antiAliasPolygonFill = antiAliasPolygonFill;
 }
 
 bool KisPainter::antiAliasPolygonFill()
 {
     return d->antiAliasPolygonFill;
 }
 
 void KisPainter::setStrokeStyle(KisPainter::StrokeStyle strokeStyle)
 {
     d->strokeStyle = strokeStyle;
 }
 KisPainter::StrokeStyle KisPainter::strokeStyle() const
 {
     return d->strokeStyle;
 }
 
 void KisPainter::setFlow(quint8 flow)
 {
     d->paramInfo.flow = float(flow) / 255.0f;
 }
 
 quint8 KisPainter::flow() const
 {
     return quint8(d->paramInfo.flow * 255.0f);
 }
 
 void KisPainter::setOpacityUpdateAverage(quint8 opacity)
 {
     d->isOpacityUnit = opacity == OPACITY_OPAQUE_U8;
     d->paramInfo.updateOpacityAndAverage(float(opacity) / 255.0f);
 }
 
 void KisPainter::setOpacity(quint8 opacity)
 {
     d->isOpacityUnit = opacity == OPACITY_OPAQUE_U8;
     d->paramInfo.opacity = float(opacity) / 255.0f;
 }
 
 quint8 KisPainter::opacity() const
 {
     return quint8(d->paramInfo.opacity * 255.0f);
 }
 
 void KisPainter::setCompositeOp(const KoCompositeOp * op)
 {
     d->compositeOp = op;
 }
 
 const KoCompositeOp * KisPainter::compositeOp()
 {
     return d->compositeOp;
 }
 
 /**
  * TODO: Rename this setCompositeOpId().  See KoCompositeOpRegistry.h
  */
 void KisPainter::setCompositeOp(const QString& op)
 {
     d->compositeOp = d->colorSpace->compositeOp(op);
 }
 
 void KisPainter::setSelection(KisSelectionSP selection)
 {
     d->selection = selection;
 }
 
 KisSelectionSP KisPainter::selection()
 {
     return d->selection;
 }
 
 KoUpdater * KisPainter::progressUpdater()
 {
     return d->progressUpdater;
 }
 
 void KisPainter::setGradient(const KoAbstractGradient* gradient)
 {
     d->gradient = gradient;
 }
 
 const KoAbstractGradient* KisPainter::gradient() const
 {
     return d->gradient;
 }
 
 void KisPainter::setPaintOpPreset(KisPaintOpPresetSP preset, KisNodeSP node, KisImageSP image)
 {
     d->paintOpPreset = preset;
     KisPaintOp *paintop = KisPaintOpRegistry::instance()->paintOp(preset, this, node, image);
     Q_ASSERT(paintop);
     if (paintop) {
         delete d->paintOp;
         d->paintOp = paintop;
     }
     else {
         warnKrita << "Could not create paintop for preset " << preset->name();
     }
 }
 
 KisPaintOpPresetSP KisPainter::preset() const
 {
     return d->paintOpPreset;
 }
 
 KisPaintOp* KisPainter::paintOp() const
 {
     return d->paintOp;
 }
 
 void KisPainter::setMirrorInformation(const QPointF& axesCenter, bool mirrorHorizontally, bool mirrorVertically)
 {
     d->axesCenter = axesCenter;
     d->mirrorHorizontally = mirrorHorizontally;
     d->mirrorVertically = mirrorVertically;
 }
 
 void KisPainter::copyMirrorInformation(KisPainter* painter)
 {
     painter->setMirrorInformation(d->axesCenter, d->mirrorHorizontally, d->mirrorVertically);
 }
 
 bool KisPainter::hasMirroring() const
 {
     return d->mirrorHorizontally || d->mirrorVertically;
 }
 
 void KisPainter::setMaskImageSize(qint32 width, qint32 height)
 {
 
     d->maskImageWidth = qBound(1, width, 256);
     d->maskImageHeight = qBound(1, height, 256);
     d->fillPainter = 0;
     d->polygonMaskImage = QImage();
 }
 
 //void KisPainter::setLockAlpha(bool protect)
 //{
 //    if(d->paramInfo.channelFlags.isEmpty()) {
 //        d->paramInfo.channelFlags = d->colorSpace->channelFlags(true, true);
 //    }
 
 //    QBitArray switcher =
 //        d->colorSpace->channelFlags(protect, !protect);
 
 //    if(protect) {
 //        d->paramInfo.channelFlags &= switcher;
 //    }
 //    else {
 //        d->paramInfo.channelFlags |= switcher;
 //    }
 
 //    Q_ASSERT(quint32(d->paramInfo.channelFlags.size()) == d->colorSpace->channelCount());
 //}
 
 //bool KisPainter::alphaLocked() const
 //{
 //    QBitArray switcher = d->colorSpace->channelFlags(false, true);
 //    return !(d->paramInfo.channelFlags & switcher).count(true);
 //}
 
 void KisPainter::setRenderingIntent(KoColorConversionTransformation::Intent intent)
 {
     d->renderingIntent = intent;
 }
 
 void KisPainter::setColorConversionFlags(KoColorConversionTransformation::ConversionFlags conversionFlags)
 {
     d->conversionFlags = conversionFlags;
 }
 
 void KisPainter::renderMirrorMaskSafe(QRect rc, KisFixedPaintDeviceSP dab, bool preserveDab)
 {
     if (!d->mirrorHorizontally && !d->mirrorVertically) return;
 
     KisFixedPaintDeviceSP dabToProcess = dab;
     if (preserveDab) {
         dabToProcess = new KisFixedPaintDevice(*dab);
     }
     renderMirrorMask(rc, dabToProcess);
 }
 
 void KisPainter::renderMirrorMaskSafe(QRect rc, KisPaintDeviceSP dab, int sx, int sy, KisFixedPaintDeviceSP mask, bool preserveMask)
 {
     if (!d->mirrorHorizontally && !d->mirrorVertically) return;
 
     KisFixedPaintDeviceSP maskToProcess = mask;
     if (preserveMask) {
         maskToProcess = new KisFixedPaintDevice(*mask);
     }
     renderMirrorMask(rc, dab, sx, sy, maskToProcess);
 }
 
 void KisPainter::renderMirrorMask(QRect rc, KisFixedPaintDeviceSP dab)
 {
     int x = rc.topLeft().x();
     int y = rc.topLeft().y();
 
     KisLodTransform t(d->device);
     QPointF effectiveAxesCenter = t.map(d->axesCenter);
 
     int mirrorX = -((x+rc.width()) - effectiveAxesCenter.x()) + effectiveAxesCenter.x();
     int mirrorY = -((y+rc.height()) - effectiveAxesCenter.y()) + effectiveAxesCenter.y();
 
     if (d->mirrorHorizontally && d->mirrorVertically){
         dab->mirror(true, false);
         bltFixed(mirrorX, y, dab, 0,0,rc.width(),rc.height());
         dab->mirror(false,true);
         bltFixed(mirrorX, mirrorY, dab, 0,0,rc.width(),rc.height());
         dab->mirror(true, false);
         bltFixed(x, mirrorY, dab, 0,0,rc.width(),rc.height());
 
     }
     else if (d->mirrorHorizontally){
         dab->mirror(true, false);
         bltFixed(mirrorX, y, dab, 0,0,rc.width(),rc.height());
     }
     else if (d->mirrorVertically){
         dab->mirror(false, true);
         bltFixed(x, mirrorY, dab, 0,0,rc.width(),rc.height());
     }
 
 }
 
 void KisPainter::renderMirrorMask(QRect rc, KisFixedPaintDeviceSP dab, KisFixedPaintDeviceSP mask)
 {
     int x = rc.topLeft().x();
     int y = rc.topLeft().y();
 
     KisLodTransform t(d->device);
     QPointF effectiveAxesCenter = t.map(d->axesCenter);
 
     int mirrorX = -((x+rc.width()) - effectiveAxesCenter.x()) + effectiveAxesCenter.x();
     int mirrorY = -((y+rc.height()) - effectiveAxesCenter.y()) + effectiveAxesCenter.y();
 
     if (d->mirrorHorizontally && d->mirrorVertically){
         dab->mirror(true, false);
         mask->mirror(true, false);
         bltFixedWithFixedSelection(mirrorX,y, dab, mask, rc.width() ,rc.height() );
 
         dab->mirror(false,true);
         mask->mirror(false, true);
         bltFixedWithFixedSelection(mirrorX,mirrorY, dab, mask, rc.width() ,rc.height() );
 
         dab->mirror(true, false);
         mask->mirror(true, false);
         bltFixedWithFixedSelection(x,mirrorY, dab, mask, rc.width() ,rc.height() );
 
     }else if (d->mirrorHorizontally){
         dab->mirror(true, false);
         mask->mirror(true, false);
         bltFixedWithFixedSelection(mirrorX,y, dab, mask, rc.width() ,rc.height() );
 
     }else if (d->mirrorVertically){
         dab->mirror(false, true);
         mask->mirror(false, true);
         bltFixedWithFixedSelection(x,mirrorY, dab, mask, rc.width() ,rc.height() );
     }
 
 }
 
 
 void KisPainter::renderMirrorMask(QRect rc, KisPaintDeviceSP dab){
     if (d->mirrorHorizontally || d->mirrorVertically){
         KisFixedPaintDeviceSP mirrorDab(new KisFixedPaintDevice(dab->colorSpace()));
         QRect dabRc( QPoint(0,0), QSize(rc.width(),rc.height()) );
         mirrorDab->setRect(dabRc);
         mirrorDab->initialize();
 
         dab->readBytes(mirrorDab->data(),rc);
 
         renderMirrorMask( QRect(rc.topLeft(),dabRc.size()), mirrorDab);
     }
 }
 
 void KisPainter::renderMirrorMask(QRect rc, KisPaintDeviceSP dab, int sx, int sy, KisFixedPaintDeviceSP mask)
 {
     if (d->mirrorHorizontally || d->mirrorVertically){
         KisFixedPaintDeviceSP mirrorDab(new KisFixedPaintDevice(dab->colorSpace()));
         QRect dabRc( QPoint(0,0), QSize(rc.width(),rc.height()) );
         mirrorDab->setRect(dabRc);
         mirrorDab->initialize();
         dab->readBytes(mirrorDab->data(),QRect(QPoint(sx,sy),rc.size()));
         renderMirrorMask(rc, mirrorDab, mask);
     }
 }
 
 void KisPainter::renderDabWithMirroringNonIncremental(QRect rc, KisPaintDeviceSP dab)
 {
     QVector<QRect> rects;
 
     int x = rc.topLeft().x();
     int y = rc.topLeft().y();
 
     KisLodTransform t(d->device);
     QPointF effectiveAxesCenter = t.map(d->axesCenter);
 
     int mirrorX = -((x+rc.width()) - effectiveAxesCenter.x()) + effectiveAxesCenter.x();
     int mirrorY = -((y+rc.height()) - effectiveAxesCenter.y()) + effectiveAxesCenter.y();
 
     rects << rc;
 
     if (d->mirrorHorizontally && d->mirrorVertically){
         rects << QRect(mirrorX, y, rc.width(), rc.height());
         rects << QRect(mirrorX, mirrorY, rc.width(), rc.height());
         rects << QRect(x, mirrorY, rc.width(), rc.height());
     } else if (d->mirrorHorizontally) {
         rects << QRect(mirrorX, y, rc.width(), rc.height());
     } else if (d->mirrorVertically) {
         rects << QRect(x, mirrorY, rc.width(), rc.height());
     }
 
     Q_FOREACH (const QRect &rc, rects) {
         d->device->clear(rc);
     }
 
     QRect resultRect = dab->extent() | rc;
     bool intersects = false;
 
     for (int i = 1; i < rects.size(); i++) {
         if (rects[i].intersects(resultRect)) {
             intersects = true;
             break;
         }
     }
 
     /**
      * If there are no cross-intersections, we can use a fast path
      * and do no cycling recompositioning
      */
     if (!intersects) {
         rects.resize(1);
     }
 
     Q_FOREACH (const QRect &rc, rects) {
         bitBlt(rc.topLeft(), dab, rc);
     }
 
     Q_FOREACH (const QRect &rc, rects) {
         renderMirrorMask(rc, dab);
     }
 }
 
diff --git a/libs/image/kis_painter.h b/libs/image/kis_painter.h
index e9ba96d7a7..353afb1a28 100644
--- a/libs/image/kis_painter.h
+++ b/libs/image/kis_painter.h
@@ -1,808 +1,809 @@
 /*
  *  Copyright (c) 2002 Patrick Julien <freak@codepimps.org>
  *  Copyright (c) 2004 Clarence Dang <dang@kde.org>
  *  Copyright (c) 2008-2010 Lukáš Tvrdý <lukast.dev@gmail.com>
  *  Copyright (c) 2010 José Luis Vergara Toloza <pentalis@gmail.com>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
 #ifndef KIS_PAINTER_H_
 #define KIS_PAINTER_H_
 
 #include <math.h>
 
 #include <QVector>
 
 #include <KoColorSpaceConstants.h>
 #include <KoColorConversionTransformation.h>
 
 #include "kundo2magicstring.h"
 #include "kis_types.h"
 #include <kis_filter_configuration.h>
 #include <kritaimage_export.h>
 
 class QPen;
 class KUndo2Command;
 class QRect;
 class QRectF;
 class QBitArray;
 class QPainterPath;
 
 class KoAbstractGradient;
 class KoUpdater;
 class KoColor;
 class KoCompositeOp;
 
 class KisUndoAdapter;
 class KisPostExecutionUndoAdapter;
 class KisTransaction;
 class KoPattern;
 class KisPaintInformation;
 class KisPaintOp;
 class KisDistanceInformation;
 
 /**
  * KisPainter contains the graphics primitives necessary to draw on a
  * KisPaintDevice. This is the same kind of abstraction as used in Qt
  * itself, where you have QPainter and QPaintDevice.
  *
  * However, KisPainter works on a tiled image and supports different
  * color models, and that's a lot more complicated.
  *
  * KisPainter supports transactions that can group various paint operations
  * in one undoable step.
  *
  * For more complex operations, you might want to have a look at the subclasses
  * of KisPainter: KisConvolutionPainter, KisFillPainter and KisGradientPainter
  *
  * KisPainter sets a number of default values, like COMPOSITE_OVER for compositeop,
  * OPACITY_OPAQUE for opacity and no selection for selection.
  */
 class KRITAIMAGE_EXPORT KisPainter
 {
 
 
 public:
     /// Construct painter without a device
     KisPainter();
 
     /// Construct a painter, and begin painting on the device
     KisPainter(KisPaintDeviceSP device);
 
     /// Construct a painter, and begin painting on the device. All actions will be masked by the given selection.
     KisPainter(KisPaintDeviceSP device, KisSelectionSP selection);
     virtual ~KisPainter();
 
 public:
     static void copyAreaOptimized(const QPoint &dstPt,
                                   KisPaintDeviceSP src,
                                   KisPaintDeviceSP dst,
                                   const QRect &originalSrcRect);
 
     static void copyAreaOptimizedOldData(const QPoint &dstPt,
                                          KisPaintDeviceSP src,
                                          KisPaintDeviceSP dst,
                                          const QRect &originalSrcRect);
 
     static void copyAreaOptimized(const QPoint &dstPt,
                                   KisPaintDeviceSP src,
                                   KisPaintDeviceSP dst,
                                   const QRect &originalSrcRect,
                                   KisSelectionSP selection);
 
     static KisPaintDeviceSP convertToAlphaAsAlpha(KisPaintDeviceSP src);
     static KisPaintDeviceSP convertToAlphaAsGray(KisPaintDeviceSP src);
+    static bool checkDeviceHasTransparency(KisPaintDeviceSP dev);
 
     /**
      * Start painting on the specified device. Not undoable.
      */
     void begin(KisPaintDeviceSP device);
 
     /**
      * Start painting on the specified paint device. All actions will be masked by the given selection.
      */
     void begin(KisPaintDeviceSP device, KisSelectionSP selection);
 
     /**
      * Finish painting on the current device
      */
     void end();
 
     /**
      * If set, the painter action is cancelable, if the action supports that.
      */
     void setProgress(KoUpdater * progressUpdater);
 
     /// Begin an undoable paint operation
     void beginTransaction(const KUndo2MagicString& transactionName = KUndo2MagicString(),int timedID = -1);
 
     /// Cancel all the changes made by the painter
     void revertTransaction();
 
     /// Finish the undoable paint operation
     void endTransaction(KisUndoAdapter *undoAdapter);
 
     /**
      * Finish transaction and load it to a special adapter for strokes
      */
     void endTransaction(KisPostExecutionUndoAdapter *undoAdapter);
 
     /**
      * Finishes a transaction and returns a pointer to its undo command
      */
     KUndo2Command* endAndTakeTransaction();
 
     /**
      * Finish the transaction and delete it's undo information.
      * NOTE: Be careful, because all the previous transactions
      * will become non-undoable after execution of this method.
      */
     void deleteTransaction();
 
     /// continue a transaction started somewhere else
     void putTransaction(KisTransaction* transaction);
 
     /// take transaction out of the reach of KisPainter
     KisTransaction* takeTransaction();
 
     /// Returns the current paint device.
     const KisPaintDeviceSP device() const;
     KisPaintDeviceSP device();
 
 
 
     /**
      * Blast a region of srcWidth @param srcWidth and srcHeight @param srcHeight from @param
      * srcDev onto the current paint device. @param srcX and @param srcY set the x and y
      * positions of the origin top-left corner, @param dstX and @param dstY those of
      * the destination.
      * Any pixel read outside the limits of @param srcDev will return the
      * default pixel, this is a property of \ref KisPaintDevice.
      *
      * @param dstX the destination x-coordinate
      * @param dstY the destination y-coordinate
      * @param srcDev the source device
      * @param srcX the source x-coordinate
      * @param srcY the source y-coordinate
      * @param srcWidth the width of the region to be manipulated
      * @param srcHeight the height of the region to be manipulated
      */
     void bitBlt(qint32 dstX, qint32 dstY,
                 const KisPaintDeviceSP srcDev,
                 qint32 srcX, qint32 srcY,
                 qint32 srcWidth, qint32 srcHeight);
 
     /**
      * Convenience method that uses QPoint and QRect.
      *
      * @param pos the destination coordinate, it replaces @param dstX and @param dstY.
      * @param srcDev the source device.
      * @param srcRect the rectangle describing the area to blast from @param srcDev into the current paint device.
      * @param srcRect replaces @param srcX, @param srcY, @param srcWidth and @param srcHeight.
      *
      */
     void bitBlt(const QPoint & pos, const KisPaintDeviceSP srcDev, const QRect & srcRect);
 
     /**
      * The same as @ref bitBlt() but reads data from oldData() part of the device
      *
      * @param dstX the destination x-coordinate
      * @param dstY the destination y-coordinate
      * @param srcDev the source device
      * @param srcX the source x-coordinate
      * @param srcY the source y-coordinate
      * @param srcWidth the width of the region to be manipulated
      * @param srcHeight the height of the region to be manipulated
      */
     void bitBltOldData(qint32 dstX, qint32 dstY,
                        const KisPaintDeviceSP srcDev,
                        qint32 srcX, qint32 srcY,
                        qint32 srcWidth, qint32 srcHeight);
 
     /**
      * Convenience method that uses QPoint and QRect.
      *
      * @param pos the destination coordinate, it replaces @param dstX and @param dstY.
      * @param srcDev the source device.
      * @param srcRect the rectangle describing the area to blast from @param srcDev into the current paint device.
      * @param srcRect replaces @param srcX, @param srcY, @param srcWidth and @param srcHeight.
      *
      */
     void bitBltOldData(const QPoint & pos, const KisPaintDeviceSP srcDev, const QRect & srcRect);
 
     /**
      * Blasts a @param selection of srcWidth @param srcWidth and srcHeight @param srcHeight
      * of @param srcDev on the current paint device. There is parameters
      * to control where the area begins in each distinct device, explained below.
      * @param selection can be used as a mask to shape @param srcDev to
      * something interesting in the same step it is rendered to the current
      * paint device. @param selection 's colorspace must be alpha8 (the
      * colorspace for selections/transparency), the rectangle formed by
      * @param selX, @param selY, @param srcWidth and @param srcHeight must not go
      * beyond its limits, and they must be different from zero.
      * @param selection and KisPainter's selection (the user selection) are
      * fused together through the composite operation COMPOSITE_MULT.
      * Any pixel read outside the limits of @param srcDev will return the
      * default pixel, this is a property of \ref KisPaintDevice.
      *
      * @param dstX the destination x-coordinate
      * @param dstY the destination y-coordinate
      * @param srcDev the source device
      * @param selection the custom selection to apply on the source device
      * @param selX the selection x-coordinate
      * @param selY the selection y-coordinate
      * @param srcX the source x-coordinate
      * @param srcY the source y-coordinate
      * @param srcWidth the width of the region to be manipulated
      * @param srcHeight the height of the region to be manipulated
      *
      */
     void bitBltWithFixedSelection(qint32 dstX, qint32 dstY,
                                   const KisPaintDeviceSP srcDev,
                                   const KisFixedPaintDeviceSP selection,
                                   qint32 selX, qint32 selY,
                                   qint32 srcX, qint32 srcY,
                                   qint32 srcWidth, qint32 srcHeight);
 
     /**
      * Convenience method that assumes @param selX, @param selY, @param srcX and @param srcY are
      * equal to 0. Best used when @param selection and the desired area of @param srcDev have exactly
      * the same dimensions and are specially made for each other.
      *
      * @param dstX the destination x-coordinate
      * @param dstY the destination y-coordinate
      * @param srcDev the source device
      * @param selection the custom selection to apply on the source device
      * @param srcWidth the width of the region to be manipulated
      * @param srcHeight the height of the region to be manipulated
      */
     void bitBltWithFixedSelection(qint32 dstX, qint32 dstY,
                                   const KisPaintDeviceSP srcDev,
                                   const KisFixedPaintDeviceSP selection,
                                   qint32 srcWidth, qint32 srcHeight);
 
     /**
      * Blast a region of srcWidth @param srcWidth and srcHeight @param srcHeight from @param srcDev onto the current
      * paint device. @param srcX and @param srcY set the x and y positions of the
      * origin top-left corner, @param dstX and @param dstY those of the destination.
      * @param srcDev is a \ref KisFixedPaintDevice: this means that @param srcDev must have the same
      * colorspace as the destination device.
      *
      * @param dstX the destination x-coordinate
      * @param dstY the destination y-coordinate
      * @param srcDev the source device
      * @param srcX the source x-coordinate
      * @param srcY the source y-coordinate
      * @param srcWidth the width of the region to be manipulated
      * @param srcHeight the height of the region to be manipulated
      */
     void bltFixed(qint32 dstX, qint32 dstY,
                   const KisFixedPaintDeviceSP srcDev,
                   qint32 srcX, qint32 srcY,
                   qint32 srcWidth, qint32 srcHeight);
 
     /**
      * Convenience method that uses QPoint and QRect.
      *
      * @param pos the destination coordinate, it replaces @param dstX and @param dstY.
      * @param srcDev the source device.
      * @param srcRect the rectangle describing the area to blast from @param srcDev into the current paint device.
      * @param srcRect replaces @param srcX, @param srcY, @param srcWidth and @param srcHeight.
      *
      */
     void bltFixed(const QPoint & pos, const KisFixedPaintDeviceSP srcDev, const QRect & srcRect);
 
     /**
      * Blasts a @param selection of srcWidth @param srcWidth and srcHeight @param srcHeight
      * of @param srcDev on the current paint device. There is parameters to control
      * the top-left corner of the area in each respective paint device (@param dstX,
      * @param dstY, @param srcX, @param srcY).
      * @param selection can be used as a mask to shape @param srcDev to something
      * interesting in the same step it is rendered to the current paint device.
      * @param srcDev is a \ref KisFixedPaintDevice: this means that @param srcDev
      * must have the same colorspace as the destination device.
      * @param selection 's colorspace must be alpha8 (the colorspace for
      * selections/transparency).
      * The rectangle formed by the respective top-left coordinates of each device
      * and @param srcWidth and @param srcHeight must not go beyond their limits, and
      * they must be different from zero.
      * @param selection and KisPainter's selection (the user selection) are
      * fused together through the composite operation COMPOSITE_MULT.
      *
      * @param dstX the destination x-coordinate
      * @param dstY the destination y-coordinate
      * @param srcDev the source device
      * @param selection the selection stored in fixed device
      * @param selX the selection x-coordinate
      * @param selY the selection y-coordinate
      * @param srcX the source x-coordinate
      * @param srcY the source y-coordinate
      * @param srcWidth the width of the region to be manipulated
      * @param srcHeight the height of the region to be manipulated
      */
     void bltFixedWithFixedSelection(qint32 dstX, qint32 dstY,
                                     const KisFixedPaintDeviceSP srcDev,
                                     const KisFixedPaintDeviceSP selection,
                                     qint32 selX, qint32 selY,
                                     qint32 srcX, qint32 srcY,
                                     quint32 srcWidth, quint32 srcHeight);
 
     /**
      * Convenience method that assumes @param selX, @param selY, @param srcX and @param srcY are
      * equal to 0. Best used when @param selection and @param srcDev have exactly the same
      * dimensions and are specially made for each other.
      *
      * @param dstX the destination x-coordinate
      * @param dstY the destination y-coordinate
      * @param srcDev the source device
      * @param selection the custom selection to apply on the source device
      * @param srcWidth the width of the region to be manipulated
      * @param srcHeight the height of the region to be manipulated
      */
     void bltFixedWithFixedSelection(qint32 dstX, qint32 dstY,
                                     const KisFixedPaintDeviceSP srcDev,
                                     const KisFixedPaintDeviceSP selection,
                                     quint32 srcWidth, quint32 srcHeight);
 
     /**
      * fills a region of width @param width and height @param height of the current
      * paint device with the color @param color. @param x and @param y set the x and y positions of the
      * origin top-left corner.
      *
      * @param x the destination x-coordinate
      * @param y the destination y-coordinate
      * @param width the width of the region to be manipulated
      * @param height the height of the region to be manipulated
      * @param color the color the area is filled with
      */
     void fill(qint32 x, qint32 y, qint32 width, qint32 height, const KoColor& color);
 
     /**
      * First you need to setup the painter with setMirrorInformation,
      * then these set of methods provide way to render the devices mirrored
      * according the axesCenter vertically or horizontally or both.
      *
      * @param rc rectangle area covered by dab
      * @param dab this device will be mirrored in-place, it means that it will be changed
      */
     void renderMirrorMask(QRect rc, KisFixedPaintDeviceSP dab);
     void renderMirrorMask(QRect rc, KisFixedPaintDeviceSP dab, KisFixedPaintDeviceSP mask);
     void renderMirrorMask(QRect rc, KisPaintDeviceSP dab);
     void renderMirrorMask(QRect rc, KisPaintDeviceSP dab, int sx, int sy, KisFixedPaintDeviceSP mask);
 
     /**
      * Convenience method for renderMirrorMask(), allows to choose whether
      * we need to preserve out dab or do the transformations in-place.
      *
      * @param rc rectangle area covered by dab
      * @param dab the device to render
      * @param preserveDab states whether a temporary device should be
      *                    created to do the transformations
      */
     void renderMirrorMaskSafe(QRect rc, KisFixedPaintDeviceSP dab, bool preserveDab);
 
     /**
      * Convenience method for renderMirrorMask(), allows to choose whether
      * we need to preserve our fixed mask or do the transformations in-place.
      *
      * @param rc rectangle area covered by dab
      * @param dab the device to render
      * @param mask mask to use for rendering
      * @param preserveMask states whether a temporary device should be
      *                    created to do the transformations
      */
     void renderMirrorMaskSafe(QRect rc, KisPaintDeviceSP dab, int sx, int sy, KisFixedPaintDeviceSP mask, bool preserveMask);
 
     /**
      * A complex method that re-renders a dab on an \p rc area.
      * The \p rc  area and all the dedicated mirroring areas are cleared
      * before the painting, so this method should be used by paintops
      * which do not update the canvas incrementally, but instead
      * regenerate some internal cache \p dab with the COMPOSITE_COPY op.
      *
      * \see KisExperimentPaintOp
      */
     void renderDabWithMirroringNonIncremental(QRect rc, KisPaintDeviceSP dab);
 
     /**
       * The methods in this class do not tell the paintdevice to update, but they calculate the
       * dirty area. This method returns this dirty area and resets it.
       */
     QVector<QRect> takeDirtyRegion();
 
     /**
      * Paint a line that connects the dots in points
      */
     void paintPolyline(const QVector <QPointF> &points,
                        int index = 0, int numPoints = -1);
 
     /**
      * Draw a line between pos1 and pos2 using the currently set brush and color.
      * If savedDist is less than zero, the brush is painted at pos1 before being
      * painted along the line using the spacing setting.
      * @return the drag distance, that is the remains of the distance between p1 and p2 not covered
      * because the currenlty set brush has a spacing greater than that distance.
      */
     void paintLine(const KisPaintInformation &pi1,
                    const KisPaintInformation &pi2,
                    KisDistanceInformation *curentDistance);
 
     /**
      * Draw a Bezier curve between pos1 and pos2 using control points 1 and 2.
      * If savedDist is less than zero, the brush is painted at pos1 before being
      * painted along the curve using the spacing setting.
      * @return the drag distance, that is the remains of the distance between p1 and p2 not covered
      * because the currenlty set brush has a spacing greater than that distance.
      */
     void paintBezierCurve(const KisPaintInformation &pi1,
                           const QPointF &control1,
                           const QPointF &control2,
                           const KisPaintInformation &pi2,
                           KisDistanceInformation *currentDistance);
     /**
      * Fill the given vector points with the points needed to draw the Bezier curve between
      * pos1 and pos2 using control points 1 and 2, excluding the final pos2.
      */
     void getBezierCurvePoints(const QPointF &pos1,
                               const QPointF &control1,
                               const QPointF &control2,
                               const QPointF &pos2,
                               vQPointF& points) const;
 
     /**
      * Paint a rectangle.
      * @param rect the rectangle to paint.
      */
     void paintRect(const QRectF &rect);
 
     /**
      * Paint a rectangle.
      *
      * @param x x coordinate of the top-left corner
      * @param y y coordinate of the top-left corner
      * @param w the rectangle width
      * @param h the rectangle height
      */
     void paintRect(const qreal x,
                    const qreal y,
                    const qreal w,
                    const qreal h);
 
     /**
      * Paint the ellipse that fills the given rectangle.
      *
      * @param rect the rectangle containing the ellipse to paint.
      */
     void paintEllipse(const QRectF &rect);
 
     /**
      * Paint the ellipse that fills the given rectangle.
      *
      * @param x x coordinate of the top-left corner
      * @param y y coordinate of the top-left corner
      * @param w the rectangle width
      * @param h the rectangle height
      */
     void paintEllipse(const qreal x,
                       const qreal y,
                       const qreal w,
                       const qreal h);
 
     /**
      * Paint the polygon with the points given in points. It automatically closes the polygon
      * by drawing the line from the last point to the first.
      */
     void paintPolygon(const vQPointF& points);
 
     /** Draw a spot at pos using the currently set paint op, brush and color */
     void paintAt(const KisPaintInformation &pos,
                  KisDistanceInformation *savedDist);
 
     /**
      * Stroke the given QPainterPath.
      */
     void paintPainterPath(const QPainterPath& path);
 
     /**
      * Fills the area enclosed by the given QPainterPath
      * Convenience method for fillPainterPath(path, rect)
      */
     void fillPainterPath(const QPainterPath& path);
 
     /**
      * Fills the portion of an area enclosed by the given QPainterPath
      *
      * \param rect the portion of the path to fill
      */
     void fillPainterPath(const QPainterPath& path, const QRect &requestedRect);
 
     /**
      * Draw the path using the Pen
      *
      * if \p requestedRect is null, the entire path is painted
      */
     void drawPainterPath(const QPainterPath& path, const QPen& pen, const QRect &requestedRect);
 
     // convenience overload
     void drawPainterPath(const QPainterPath& path, const QPen& pen);
 
     /**
      * paint an unstroked one-pixel wide line from specified start position to the
      * specified end position.
      *
      */
     void drawLine(const QPointF & start, const QPointF & end);
 
     /**
      * paint an unstroked line with thickness from specified start position to the
      * specified end position. Scanline algorithm is used.
      */
     void drawLine(const QPointF &start, const QPointF &end, qreal width, bool antialias);
 
 
     /**
      * paints an unstroked, aliased one-pixel line using the DDA algorithm from specified start position to the
      * specified end position.
      *
      */
     void drawDDALine(const QPointF & start, const QPointF & end);
 
     /**
      * Paint an unstroked, wobbly one-pixel wide line from the specified start to the specified
      * end position.
      *
      */
     void drawWobblyLine(const QPointF & start, const QPointF & end);
 
     /**
      * Paint an unstroked, anti-aliased one-pixel wide line from the specified start to the specified
      * end position using the Wu algorithm
      */
     void drawWuLine(const QPointF & start, const QPointF & end);
 
     /**
      * Paint an unstroked wide line from the specified start to the specified
      * end position with width varying from @param w1 at the start to @param w2 at
      * the end.
      *
      * XXX: the width should be set in doubles, not integers.
      */
     void drawThickLine(const QPointF & start, const QPointF & end, int startWidth, int endWidth);
 
     /**
      * Set the channelflags: a bit array where true means that the
      * channel corresponding in position with the bit will be read
      * by the operation, and false means that it will not be affected.
      *
      * An empty channelFlags parameter means that all channels are
      * affected.
      *
      * @param the bit array that masks the source channels; only
      * the channels where the corresponding bit is true will will be
      * composited onto the destination device.
      */
     void setChannelFlags(QBitArray channelFlags);
 
     /// @return the channel flags
     QBitArray channelFlags();
 
     /**
      * Set the paintop preset to use. If @param image is given,
      * the paintop will be created using this image as parameter.
      * Some paintops really want to know about the image they work
      * for, e.g. the clone paintop.
      */
     void setPaintOpPreset(KisPaintOpPresetSP preset, KisNodeSP node, KisImageSP image);
 
     /// Return the paintop preset
     KisPaintOpPresetSP preset() const;
 
     /**
      * Return the active paintop (which is created based on the specified preset and
      * will be deleted as soon as the KisPainter instance dies).
      */
     KisPaintOp* paintOp() const;
 
     void setMirrorInformation(const QPointF &axesCenter, bool mirrorHorizontally, bool mirrorVertically);
 
     /**
      * copy the mirror information to other painter
      */
     void copyMirrorInformation(KisPainter * painter);
 
     /**
      * Returns whether the mirroring methods will do any
      * work when called
      */
     bool hasMirroring() const;
 
     /// Set the current pattern
     void setPattern(const KoPattern * pattern);
 
     /// Returns the currently set pattern
     const KoPattern * pattern() const;
 
     /**
      * Set the color that will be used to paint with, and convert it
      * to the color space of the current paint device.
      */
     void setPaintColor(const KoColor& color);
 
     /// Returns the color that will be used to paint with
     const KoColor &paintColor() const;
 
     /**
      * Set the current background color, and convert it
      * to the color space of the current paint device.
      */
     void setBackgroundColor(const KoColor& color);
 
     /// Returns the current background color
     const KoColor &backgroundColor() const;
 
     /// Set the current generator (a generator can be used to fill an area
     void setGenerator(KisFilterConfigurationSP generator);
 
     /// @return the current generator configuration
     const KisFilterConfigurationSP  generator() const;
 
     /// This enum contains the styles with which we can fill things like polygons and ellipses
     enum FillStyle {
         FillStyleNone,
         FillStyleForegroundColor,
         FillStyleBackgroundColor,
         FillStylePattern,
         FillStyleGradient,
         FillStyleStrokes,
         FillStyleGenerator,
     };
 
     /// Set the current style with which to fill
     void setFillStyle(FillStyle fillStyle);
 
     /// Returns the current fill style
     FillStyle fillStyle() const;
 
     /// Set whether a polygon's filled area should be anti-aliased or not. The default is true.
     void setAntiAliasPolygonFill(bool antiAliasPolygonFill);
 
     /// Return whether a polygon's filled area should be anti-aliased or not
     bool antiAliasPolygonFill();
 
     /// The style of the brush stroke around polygons and so
     enum StrokeStyle {
         StrokeStyleNone,
         StrokeStyleBrush
     };
 
     /// Set the current brush stroke style
     void setStrokeStyle(StrokeStyle strokeStyle);
 
     /// Returns the current brush stroke style
     StrokeStyle strokeStyle() const;
 
     void setFlow(quint8 flow);
 
     quint8 flow() const;
 
     /**
      * Sets the opacity of the painting and recalculates the
      * mean opacity of the stroke. This mean value is used to
      * make ALPHA_DARKEN painting look correct
      */
     void setOpacityUpdateAverage(quint8 opacity);
 
     /// Set the opacity which is used in painting (like filling polygons)
     void setOpacity(quint8 opacity);
 
     /// Returns the opacity that is used in painting
     quint8 opacity() const;
 
     /// Set the composite op for this painter
     void setCompositeOp(const KoCompositeOp * op);
     const KoCompositeOp * compositeOp();
 
     /// Set the composite op for this painter by string.
     /// Note: the colorspace must be set previously!
     void setCompositeOp(const QString& op);
 
     /**
      * Add the r to the current dirty rect.
      */
     void addDirtyRect(const QRect & r);
 
     /**
      * Reset the selection to the given selection. All painter actions will be
      * masked by the specified selection.
      */
     void setSelection(KisSelectionSP selection);
 
     /**
      * @return the selection set on this painter.
      */
     KisSelectionSP selection();
 
     void setGradient(const KoAbstractGradient* gradient);
     const KoAbstractGradient* gradient() const;
 
     /**
     * Set the size of the tile in fillPainterPath, useful when optimizing the use of fillPainterPath
     * e.g. Spray paintop uses more small tiles, although selections uses bigger tiles. QImage::fill
     * is quite expensive so with smaller images you can save instructions
     * Default and maximum size is 256x256 image
     */
     void setMaskImageSize(qint32 width, qint32 height);
 
 //    /**
 //     * If the alpha channel is locked, the alpha values of the paint device we are painting on
 //     * will not change.
 //     */
 //    void setLockAlpha(bool protect);
 //    bool alphaLocked() const;
 
     /**
      * set the rendering intent in case pixels need to be converted before painting
      */
     void setRenderingIntent(KoColorConversionTransformation::Intent intent);
 
     /**
      * set the conversion flags in case pixels need to be converted before painting
      */
     void setColorConversionFlags(KoColorConversionTransformation::ConversionFlags conversionFlags);
 
 protected:
     /// Initialize, set everything to '0' or defaults
     void init();
 
     /// Fill the polygon defined by points with the fillStyle
     void fillPolygon(const vQPointF& points, FillStyle fillStyle);
 
 private:
 
     KisPainter(const KisPainter&);
     KisPainter& operator=(const KisPainter&);
 
     float frac(float value) {
         float tmp = 0;
         return modff(value , &tmp);
     }
 
     float invertFrac(float value) {
         float tmp = 0;
         return 1.0f - modff(value , &tmp);
     }
 
 protected:
     KoUpdater * progressUpdater();
 
 private:
     template <bool useOldSrcData>
         void bitBltImpl(qint32 dstX, qint32 dstY,
                         const KisPaintDeviceSP srcDev,
                         qint32 srcX, qint32 srcY,
                         qint32 srcWidth, qint32 srcHeight);
 
     inline void compositeOnePixel(quint8 *dst, const KoColor &color);
 
 private:
 
     struct Private;
     Private* const d;
 };
 
 
 #endif // KIS_PAINTER_H_
 
diff --git a/libs/ui/KisImportExportManager.cpp b/libs/ui/KisImportExportManager.cpp
index e3b8edb3f8..d9471e78cb 100644
--- a/libs/ui/KisImportExportManager.cpp
+++ b/libs/ui/KisImportExportManager.cpp
@@ -1,495 +1,489 @@
 /*
  * Copyright (C) 2016 Boudewijn Rempt <boud@valdyas.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "KisImportExportManager.h"
 
 #include <QFile>
 #include <QLabel>
 #include <QVBoxLayout>
 #include <QList>
 #include <QApplication>
 #include <QByteArray>
 #include <QPluginLoader>
 #include <QFileInfo>
 #include <QMessageBox>
 #include <QJsonObject>
 #include <QTextBrowser>
 #include <QCheckBox>
 #include <QSaveFile>
 #include <QGroupBox>
 
 #include <klocalizedstring.h>
 #include <ksqueezedtextlabel.h>
 #include <kpluginfactory.h>
 
 #include <KoFileDialog.h>
 #include <kis_icon_utils.h>
 #include <KoDialog.h>
 #include <KoProgressUpdater.h>
 #include <KoJsonTrader.h>
 #include <KisMimeDatabase.h>
 #include <kis_config_widget.h>
 #include <kis_debug.h>
 #include <KisMimeDatabase.h>
 #include <KisPreExportChecker.h>
 #include <KisPart.h>
 #include "kis_config.h"
 #include "KisImportExportFilter.h"
 #include "KisDocument.h"
 #include <kis_image.h>
 #include <kis_paint_layer.h>
+#include "kis_painter.h"
 #include "kis_guides_config.h"
 #include "kis_grid_config.h"
 #include "kis_popup_button.h"
 #include <kis_iterator_ng.h>
 
 // static cache for import and export mimetypes
 QStringList KisImportExportManager::m_importMimeTypes;
 QStringList KisImportExportManager::m_exportMimeTypes;
 
 class Q_DECL_HIDDEN KisImportExportManager::Private
 {
 public:
     bool batchMode {false};
     QPointer<KoProgressUpdater> progressUpdater {0};
 };
 
 KisImportExportManager::KisImportExportManager(KisDocument* document)
     : m_document(document)
     , d(new Private)
 {
 }
 
 KisImportExportManager::~KisImportExportManager()
 {
     delete d;
 }
 
 KisImportExportFilter::ConversionStatus KisImportExportManager::importDocument(const QString& location, const QString& mimeType)
 {
     return convert(Import, location, location, mimeType, false, 0);
 }
 
 KisImportExportFilter::ConversionStatus KisImportExportManager::exportDocument(const QString& location, const QString& realLocation, QByteArray& mimeType, bool showWarnings, KisPropertiesConfigurationSP exportConfiguration)
 {
     return convert(Export, location, realLocation, mimeType, showWarnings, exportConfiguration);
 }
 
 // The static method to figure out to which parts of the
 // graph this mimetype has a connection to.
 QStringList KisImportExportManager::mimeFilter(Direction direction)
 {
     // Find the right mimetype by the extension
     QSet<QString> mimeTypes;
     //    mimeTypes << KisDocument::nativeFormatMimeType() << "application/x-krita-paintoppreset" << "image/openraster";
 
     if (direction == KisImportExportManager::Import) {
         if (m_importMimeTypes.isEmpty()) {
             KoJsonTrader trader;
             QList<QPluginLoader *>list = trader.query("Krita/FileFilter", "");
             Q_FOREACH(QPluginLoader *loader, list) {
                 QJsonObject json = loader->metaData().value("MetaData").toObject();
                 Q_FOREACH(const QString &mimetype, json.value("X-KDE-Import").toString().split(",", QString::SkipEmptyParts)) {
                     //qDebug() << "Adding  import mimetype" << mimetype << KisMimeDatabase::descriptionForMimeType(mimetype) << "from plugin" << loader;
                     mimeTypes << mimetype;
                 }
             }
             qDeleteAll(list);
             m_importMimeTypes = mimeTypes.toList();
         }
         return m_importMimeTypes;
     }
     else if (direction == KisImportExportManager::Export) {
         if (m_exportMimeTypes.isEmpty()) {
             KoJsonTrader trader;
             QList<QPluginLoader *>list = trader.query("Krita/FileFilter", "");
             Q_FOREACH(QPluginLoader *loader, list) {
                 QJsonObject json = loader->metaData().value("MetaData").toObject();
                 Q_FOREACH(const QString &mimetype, json.value("X-KDE-Export").toString().split(",", QString::SkipEmptyParts)) {
                     //qDebug() << "Adding  export mimetype" << mimetype << KisMimeDatabase::descriptionForMimeType(mimetype) << "from plugin" << loader;
                     mimeTypes << mimetype;
                 }
             }
             qDeleteAll(list);
             m_exportMimeTypes = mimeTypes.toList();
         }
         return m_exportMimeTypes;
     }
     return QStringList();
 }
 
 KisImportExportFilter *KisImportExportManager::filterForMimeType(const QString &mimetype, KisImportExportManager::Direction direction)
 {
     int weight = -1;
     KisImportExportFilter *filter = 0;
     QList<QPluginLoader *>list = KoJsonTrader::instance()->query("Krita/FileFilter", "");
     Q_FOREACH(QPluginLoader *loader, list) {
         QJsonObject json = loader->metaData().value("MetaData").toObject();
         QString directionKey = direction == Export ? "X-KDE-Export" : "X-KDE-Import";
         if (json.value(directionKey).toString().split(",", QString::SkipEmptyParts).contains(mimetype)) {
             KLibFactory *factory = qobject_cast<KLibFactory *>(loader->instance());
 
             if (!factory) {
                 warnUI << loader->errorString();
                 continue;
             }
 
             QObject* obj = factory->create<KisImportExportFilter>(0);
             if (!obj || !obj->inherits("KisImportExportFilter")) {
                 delete obj;
                 continue;
             }
 
             KisImportExportFilter *f = qobject_cast<KisImportExportFilter*>(obj);
             if (!f) {
                 delete obj;
                 continue;
             }
 
             int w = json.value("X-KDE-Weight").toInt();
             if (w > weight) {
                 delete filter;
                 filter = f;
                 f->setObjectName(loader->fileName());
                 weight = w;
             }
         }
     }
     qDeleteAll(list);
     if (filter) {
         filter->setMimeType(mimetype);
     }
     return filter;
 }
 
 void KisImportExportManager::setBatchMode(const bool batch)
 {
     d->batchMode = batch;
 }
 
 bool KisImportExportManager::batchMode(void) const
 {
     return d->batchMode;
 }
 
 void KisImportExportManager::setProgresUpdater(KoProgressUpdater *updater)
 {
     d->progressUpdater = updater;
 }
 
 QString KisImportExportManager::askForAudioFileName(const QString &defaultDir, QWidget *parent)
 {
     KoFileDialog dialog(parent, KoFileDialog::ImportFiles, "ImportAudio");
 
     if (!defaultDir.isEmpty()) {
         dialog.setDefaultDir(defaultDir);
     }
 
     QStringList mimeTypes;
     mimeTypes << "audio/mpeg";
     mimeTypes << "audio/ogg";
     mimeTypes << "audio/vorbis";
     mimeTypes << "audio/vnd.wave";
     mimeTypes << "audio/flac";
 
     dialog.setMimeTypeFilters(mimeTypes);
     dialog.setCaption(i18nc("@titile:window", "Open Audio"));
 
     return dialog.filename();
 }
 
 KisImportExportFilter::ConversionStatus KisImportExportManager::convert(KisImportExportManager::Direction direction, const QString &location, const QString& realLocation, const QString &mimeType, bool showWarnings, KisPropertiesConfigurationSP exportConfiguration)
 {
 
     QString typeName = mimeType;
     if (typeName.isEmpty()) {
         typeName = KisMimeDatabase::mimeTypeForFile(location);
     }
 
     QSharedPointer<KisImportExportFilter> filter(filterForMimeType(typeName, direction));
     if (!filter) {
         return KisImportExportFilter::FilterCreationError;
     }
 
     filter->setFilename(location);
     filter->setRealFilename(realLocation);
     filter->setBatchMode(batchMode());
     filter->setMimeType(typeName);
 
     if (d->progressUpdater) {
         filter->setUpdater(d->progressUpdater->startSubtask());
     }
 
     QByteArray from, to;
     if (direction == Export) {
         from = m_document->nativeFormatMimeType();
         to = mimeType.toLatin1();
     }
     else {
         from = mimeType.toLatin1();
         to = m_document->nativeFormatMimeType();
     }
 
     if (!exportConfiguration) {
         exportConfiguration = filter->lastSavedConfiguration(from, to);
         if (exportConfiguration) {
             // Fill with some meta information about the image
             KisImageWSP image = m_document->image();
-            KisPaintDeviceSP pd = image->projection();
-
-            bool isThereAlpha = false;
-            KisSequentialConstIterator it(pd, image->bounds());
-            const KoColorSpace* cs = pd->colorSpace();
-            do {
-                if (cs->opacityU8(it.oldRawData()) != OPACITY_OPAQUE_U8) {
-                    isThereAlpha = true;
-                    break;
-                }
-            } while (it.nextPixel());
+            KisPaintDeviceSP dev = image->projection();
+            const KoColorSpace* cs = dev->colorSpace();
+            const bool isThereAlpha =
+                KisPainter::checkDeviceHasTransparency(image->projection());
 
             exportConfiguration->setProperty("ImageContainsTransparency", isThereAlpha);
             exportConfiguration->setProperty("ColorModelID", cs->colorModelId().id());
             exportConfiguration->setProperty("ColorDepthID", cs->colorDepthId().id());
             bool sRGB = (cs->profile()->name().contains(QLatin1String("srgb"), Qt::CaseInsensitive) && !cs->profile()->name().contains(QLatin1String("g10")));
             exportConfiguration->setProperty("sRGB", sRGB);
         }
 
     }
 
     QStringList warnings;
     QStringList errors;
 
     if (direction == Export) {
         KisPreExportChecker checker;
         checker.check(m_document->image(), filter->exportChecks());
 
         warnings = checker.warnings();
         errors = checker.errors();
     }
 
     KisConfigWidget *wdg = filter->createConfigurationWidget(0, from, to);
     bool alsoAsKra = false;
 
 
     // Extra checks that cannot be done by the checker, because the checker only has access to the image.
     if (!m_document->assistants().isEmpty() && typeName != m_document->nativeFormatMimeType()) {
         warnings.append(i18nc("image conversion warning", "The image contains <b>assistants</b>. The assistants will not be saved."));
     }
     if (m_document->guidesConfig().hasGuides() && typeName != m_document->nativeFormatMimeType()) {
         warnings.append(i18nc("image conversion warning", "The image contains <b>guides</b>. The guides will not be saved."));
     }
     if (!m_document->gridConfig().isDefault() && typeName != m_document->nativeFormatMimeType()) {
         warnings.append(i18nc("image conversion warning", "The image contains a <b>custom grid configuration</b>. The configuration will not be saved."));
     }
 
     if (!batchMode() && !errors.isEmpty()) {
         QString error =  "<html><body><p><b>"
                 + i18n("Error: cannot save this image as a %1.", KisMimeDatabase::descriptionForMimeType(typeName))
                 + "</b> Reasons:</p>"
                 + "<p/><ul>";
         Q_FOREACH(const QString &w, errors) {
             error += "\n<li>" + w + "</li>";
         }
 
         error += "</ul>";
 
         QMessageBox::critical(KisPart::instance()->currentMainwindow(), i18nc("@title:window", "Krita: Export Error"), error);
         return KisImportExportFilter::UserCancelled;
     }
 
     if (!batchMode() && (wdg || !warnings.isEmpty())) {
 
         KoDialog dlg;
 
         dlg.setButtons(KoDialog::Ok | KoDialog::Cancel);
         dlg.setWindowTitle(KisMimeDatabase::descriptionForMimeType(mimeType));
 
         QWidget *page = new QWidget(&dlg);
         QVBoxLayout *layout = new QVBoxLayout(page);
 
         if (!warnings.isEmpty()) {
 
             if (showWarnings) {
 
                 QHBoxLayout *hLayout = new QHBoxLayout();
 
                 QLabel *labelWarning = new QLabel();
                 labelWarning->setPixmap(KisIconUtils::loadIcon("dialog-warning").pixmap(32, 32));
                 hLayout->addWidget(labelWarning);
 
                 KisPopupButton *bn = new KisPopupButton(0);
 
                 bn->setText(i18nc("Keep the extra space at the end of the sentence, please", "Warning: saving as %1 will lose information from your image.    ", KisMimeDatabase::descriptionForMimeType(mimeType)));
 
 
                 hLayout->addWidget(bn);
 
                 layout->addLayout(hLayout);
 
                 QTextBrowser *browser = new QTextBrowser();
                 browser->setMinimumWidth(bn->width());
                 bn->setPopupWidget(browser);
 
                 QString warning = "<html><body><p><b>"
                         + i18n("You will lose information when saving this image as a %1.", KisMimeDatabase::descriptionForMimeType(typeName));
 
                 if (warnings.size() == 1) {
                     warning += "</b> Reason:</p>";
                 }
                 else {
                     warning += "</b> Reasons:</p>";
                 }
                 warning += "<p/><ul>";
 
                 Q_FOREACH(const QString &w, warnings) {
                     warning += "\n<li>" + w + "</li>";
                 }
 
                 warning += "</ul>";
                 browser->setHtml(warning);
             }
         }
 
         if (wdg) {
             QGroupBox *box = new QGroupBox(i18n("Options"));
             QVBoxLayout *boxLayout = new QVBoxLayout(box);
             wdg->setConfiguration(exportConfiguration);
             boxLayout->addWidget(wdg);
             layout->addWidget(box);
         }
 
 
         QCheckBox *chkAlsoAsKra = 0;
         if (showWarnings && !warnings.isEmpty()) {
             chkAlsoAsKra = new QCheckBox(i18n("Also save your image as a Krita file."));
             chkAlsoAsKra->setChecked(KisConfig().readEntry<bool>("AlsoSaveAsKra", false));
             layout->addWidget(chkAlsoAsKra);
         }
 
         dlg.setMainWidget(page);
         dlg.resize(dlg.minimumSize());
 
         if (showWarnings || wdg) {
             if (!dlg.exec()) {
                 return KisImportExportFilter::UserCancelled;
             }
         }
 
         if (chkAlsoAsKra) {
             KisConfig().writeEntry<bool>("AlsoSaveAsKra", chkAlsoAsKra->isChecked());
             alsoAsKra = chkAlsoAsKra->isChecked();
         }
 
         if (wdg) {
             exportConfiguration = wdg->configuration();
         }
 
     }
 
     KIS_ASSERT_RECOVER_RETURN_VALUE(
                 direction == Import || direction == Export,
                 KisImportExportFilter::BadConversionGraph);
 
     if (!batchMode()) {
         QApplication::setOverrideCursor(Qt::WaitCursor);
     }
 
     KisImportExportFilter::ConversionStatus status = KisImportExportFilter::OK;
     if (direction == Import) {
         status = doImport(location, filter);
     } else /* if (direction == Export) */ {
         status = doExport(location, filter, exportConfiguration);
 
         if (alsoAsKra && status == KisImportExportFilter::OK) {
             QString kraLocation = location + ".kra";
             QByteArray mime = m_document->nativeFormatMimeType();
             QSharedPointer<KisImportExportFilter> filter(
                 filterForMimeType(QString::fromLatin1(mime), Export));
 
             KIS_SAFE_ASSERT_RECOVER_NOOP(filter);
 
             if (filter) {
                 filter->setFilename(kraLocation);
 
                 KisPropertiesConfigurationSP kraExportConfiguration =
                     filter->lastSavedConfiguration(mime, mime);
 
                 status = doExport(kraLocation, filter, kraExportConfiguration);
             } else {
                 status = KisImportExportFilter::FilterCreationError;
             }
         }
     }
 
     if (exportConfiguration) {
         KisConfig().setExportConfiguration(typeName, exportConfiguration);
     }
 
     if (!batchMode()) {
         QApplication::restoreOverrideCursor();
     }
 
     return status;
 
 }
 
 KisImportExportFilter::ConversionStatus KisImportExportManager::doImport(const QString &location, QSharedPointer<KisImportExportFilter> filter)
 {
     QFile file(location);
     if (!file.exists()) {
         return KisImportExportFilter::FileNotFound;
     }
 
     if (filter->supportsIO() && !file.open(QFile::ReadOnly)) {
         return KisImportExportFilter::FileNotFound;
     }
 
     KisImportExportFilter::ConversionStatus status =
         filter->convert(m_document, &file, KisPropertiesConfigurationSP());
 
     if (file.isOpen()) {
         file.close();
     }
 
     return status;
 }
 
 KisImportExportFilter::ConversionStatus KisImportExportManager::doExport(const QString &location, QSharedPointer<KisImportExportFilter> filter, KisPropertiesConfigurationSP exportConfiguration)
 {
     QSaveFile file(location);
     file.setDirectWriteFallback(true);
 
     if (filter->supportsIO() && !file.open(QFile::WriteOnly)) {
         file.cancelWriting();
         return KisImportExportFilter::CreationError;
     }
 
     KisImportExportFilter::ConversionStatus status =
         filter->convert(m_document, &file, exportConfiguration);
 
     if (status != KisImportExportFilter::OK) {
         file.cancelWriting();
     } else {
         file.commit();
     }
 
     return status;
 }
 
 #include <KisMimeDatabase.h>
diff --git a/plugins/impex/psd/psd_saver.cpp b/plugins/impex/psd/psd_saver.cpp
index 1aa67551d0..f5f0da0a1a 100644
--- a/plugins/impex/psd/psd_saver.cpp
+++ b/plugins/impex/psd/psd_saver.cpp
@@ -1,271 +1,247 @@
 /*
  *  Copyright (c) 2009 Boudewijn Rempt <boud@valdyas.org>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 #include "psd_saver.h"
 
 #include <KoColorSpace.h>
 #include <KoColorModelStandardIds.h>
 #include <KoColorProfile.h>
 #include <KoCompositeOp.h>
 #include <KoUnit.h>
 
 #include <QFileInfo>
 
 #include <kis_annotation.h>
 #include <kis_types.h>
 #include <kis_paint_layer.h>
+#include "kis_painter.h"
 #include <KisDocument.h>
 #include <kis_image.h>
 #include <kis_group_layer.h>
 #include <kis_paint_device.h>
 #include <kis_transaction.h>
 #include <kis_debug.h>
 #include <kis_annotation.h>
 #include <kis_types.h>
 
 #include "psd.h"
 #include "psd_header.h"
 #include "psd_colormode_block.h"
 #include "psd_utils.h"
 #include "psd_resource_section.h"
 #include "psd_layer_section.h"
 #include "psd_resource_block.h"
 #include "psd_image_data.h"
 
 
 
 QPair<psd_color_mode, quint16> colormodelid_to_psd_colormode(const QString &colorSpaceId, const QString &colorDepthId)
 {
     psd_color_mode colorMode = COLORMODE_UNKNOWN;
     if (colorSpaceId == RGBAColorModelID.id()) {
         colorMode = RGB;
     }
     else if (colorSpaceId == CMYKAColorModelID.id()) {
         colorMode = CMYK;
     }
     else if (colorSpaceId == GrayAColorModelID.id()) {
         colorMode = Grayscale;
     }
     else if (colorSpaceId == LABAColorModelID.id()) {
         colorMode = Lab;
     }
 
     quint16 depth = 0;
 
     if (colorDepthId ==  Integer8BitsColorDepthID.id()) {
         depth = 8;
     }
     else if (colorDepthId == Integer16BitsColorDepthID.id()) {
         depth = 16;
     }
     else if (colorDepthId == Float16BitsColorDepthID.id()) {
         depth = 32;
     }
     else if (colorDepthId == Float32BitsColorDepthID.id()) {
         depth = 32;
     }
 
     return QPair<psd_color_mode, quint16>(colorMode, depth);
 }
 
 
 
 PSDSaver::PSDSaver(KisDocument *doc)
     : m_image(doc->savingImage())
     , m_doc(doc)
     , m_stop(false)
 {
 }
 
 PSDSaver::~PSDSaver()
 {
 }
 
 KisImageSP PSDSaver::image()
 {
     return m_image;
 }
 
-#include "kis_sequential_iterator.h"
-
-
-bool checkIfHasTransparency(KisPaintDeviceSP dev)
-{
-    const QRect deviceBounds = dev->exactBounds();
-    const QRect imageBounds = dev->defaultBounds()->bounds();
-
-    if (deviceBounds.isEmpty() ||
-        (deviceBounds & imageBounds) != imageBounds) {
-
-        return true;
-    }
-
-    const KoColorSpace *cs = dev->colorSpace();
-    KisSequentialConstIterator it(dev, deviceBounds);
-
-    do {
-        if (cs->opacityU8(it.rawDataConst()) != OPACITY_OPAQUE_U8) {
-            return true;
-        }
-    } while(it.nextPixel());
-
-    return false;
-}
-
 KisImageBuilder_Result PSDSaver::buildFile(QIODevice *io)
 {
     if (!m_image)
         return KisImageBuilder_RESULT_EMPTY;
 
     const bool haveLayers = m_image->rootLayer()->childCount() > 1 ||
-        checkIfHasTransparency(m_image->rootLayer()->firstChild()->projection());
+        KisPainter::checkDeviceHasTransparency(
+                m_image->rootLayer()->firstChild()->projection());
 
     // HEADER
     PSDHeader header;
     header.signature = "8BPS";
     header.version = 1;
     header.nChannels = haveLayers ?
         m_image->colorSpace()->channelCount() :
         m_image->colorSpace()->colorChannelCount();
 
     header.width = m_image->width();
     header.height = m_image->height();
 
     QPair<psd_color_mode, quint16> colordef = colormodelid_to_psd_colormode(m_image->colorSpace()->colorModelId().id(),
                                                                           m_image->colorSpace()->colorDepthId().id());
 
     if (colordef.first == COLORMODE_UNKNOWN || colordef.second == 0 || colordef.second == 32) {
         return KisImageBuilder_RESULT_UNSUPPORTED_COLORSPACE;
     }
     header.colormode = colordef.first;
     header.channelDepth = colordef.second;
 
     dbgFile << "header" << header << io->pos();
 
     if (!header.write(io)) {
         dbgFile << "Failed to write header. Error:" << header.error << io->pos();
         return KisImageBuilder_RESULT_FAILURE;
     }
 
     // COLORMODE BlOCK
     PSDColorModeBlock colorModeBlock(header.colormode);
     // XXX: check for annotations that contain the duotone spec
 
     KisAnnotationSP annotation = m_image->annotation("DuotoneColormodeBlock");
     if (annotation) {
         colorModeBlock.duotoneSpecification = annotation->annotation();
     }
 
     dbgFile << "colormode block" << io->pos();
     if (!colorModeBlock.write(io)) {
         dbgFile << "Failed to write colormode block. Error:" << colorModeBlock.error << io->pos();
         return KisImageBuilder_RESULT_FAILURE;
     }
 
     // IMAGE RESOURCES SECTION
     PSDImageResourceSection resourceSection;
 
     vKisAnnotationSP_it it = m_image->beginAnnotations();
     vKisAnnotationSP_it endIt = m_image->endAnnotations();
     while (it != endIt) {
         KisAnnotationSP annotation = (*it);
         if (!annotation || annotation->type().isEmpty()) {
             dbgFile << "Warning: empty annotation";
             it++;
             continue;
         }
 
         dbgFile << "Annotation:" << annotation->type() << annotation->description();
 
         if (annotation->type().startsWith(QString("PSD Resource Block:"))) { //
             PSDResourceBlock *resourceBlock = dynamic_cast<PSDResourceBlock*>(annotation.data());
             if (resourceBlock) {
                 dbgFile << "Adding PSD Resource Block" << resourceBlock->identifier;
                 resourceSection.resources[(PSDImageResourceSection::PSDResourceID)resourceBlock->identifier] = resourceBlock;
             }
         }
 
         it++;
     }
 
     // Add resolution block
     {
         RESN_INFO_1005 *resInfo = new RESN_INFO_1005;
         resInfo->hRes = INCH_TO_POINT(m_image->xRes());
         resInfo->vRes = INCH_TO_POINT(m_image->yRes());
         PSDResourceBlock *block = new PSDResourceBlock;
         block->identifier = PSDImageResourceSection::RESN_INFO;
         block->resource = resInfo;
         resourceSection.resources[PSDImageResourceSection::RESN_INFO] = block;
     }
 
     // Add icc block
     {
         ICC_PROFILE_1039 *profileInfo = new ICC_PROFILE_1039;
         profileInfo->icc = m_image->profile()->rawData();
         PSDResourceBlock *block = new PSDResourceBlock;
         block->identifier = PSDImageResourceSection::ICC_PROFILE;
         block->resource = profileInfo;
         resourceSection.resources[PSDImageResourceSection::ICC_PROFILE] = block;
 
     }
 
 
     dbgFile << "resource section" << io->pos();
     if (!resourceSection.write(io)) {
         dbgFile << "Failed to write resource section. Error:" << resourceSection.error << io->pos();
         return KisImageBuilder_RESULT_FAILURE;
     }
 
     // LAYER AND MASK DATA
     // Only save layers and masks if there is more than one layer
     dbgFile << "m_image->rootLayer->childCount" << m_image->rootLayer()->childCount() << io->pos();
 
     if (haveLayers) {
 
         PSDLayerMaskSection layerSection(header);
         layerSection.hasTransparency = true;
 
         if (!layerSection.write(io, m_image->rootLayer())) {
             dbgFile << "failed to write layer section. Error:" << layerSection.error << io->pos();
             return KisImageBuilder_RESULT_FAILURE;
         }
     }
     else {
         // else write a zero length block
         dbgFile << "No layers, saving empty layers/mask block" << io->pos();
         psdwrite(io, (quint32)0);
     }
 
     // IMAGE DATA
     dbgFile << "Saving composited image" << io->pos();
     PSDImageData imagedata(&header);
     if (!imagedata.write(io, m_image->projection(), haveLayers)) {
         dbgFile << "Failed to write image data. Error:"  << imagedata.error;
         return KisImageBuilder_RESULT_FAILURE;
     }
 
     return KisImageBuilder_RESULT_OK;
 }
 
 
 void PSDSaver::cancel()
 {
     m_stop = true;
 }