File indexing completed on 2024-06-16 04:12:12

 /*
  *  SPDX-FileCopyrightText: 2019 Dmitry Kazakov <dimula73@gmail.com>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 #include "KisLayerStyleKnockoutBlower.h"
 
 #include "kis_painter.h"
 #include "KoCompositeOpRegistry.h"
 #include "kis_default_bounds.h"
 #include "KisImageResolutionProxy.h"
 
 
 KisLayerStyleKnockoutBlower::KisLayerStyleKnockoutBlower()
 {
 }
 
 KisLayerStyleKnockoutBlower::KisLayerStyleKnockoutBlower(const KisLayerStyleKnockoutBlower &rhs)
     : m_knockoutSelection(rhs.m_knockoutSelection ? new KisSelection(*rhs.m_knockoutSelection) : nullptr)
 {
 }
 
 KisSelectionSP KisLayerStyleKnockoutBlower::knockoutSelectionLazy()
 {
     {
         QReadLocker l(&m_lock);
         if (m_knockoutSelection) {
             return m_knockoutSelection;
         }
     }
 
     {
         QWriteLocker l(&m_lock);
         if (m_knockoutSelection) {
             return m_knockoutSelection;
         } else {
             m_knockoutSelection = new KisSelection(new KisSelectionEmptyBounds(),
                                                    KisImageResolutionProxy::identity());
             return m_knockoutSelection;
         }
     }
 }
 
 void KisLayerStyleKnockoutBlower::setKnockoutSelection(KisSelectionSP selection)
 {
     QWriteLocker l(&m_lock);
     m_knockoutSelection = selection;
 }
 
 void KisLayerStyleKnockoutBlower::resetKnockoutSelection()
 {
     QWriteLocker l(&m_lock);
     m_knockoutSelection = 0;
 }
 
 void KisLayerStyleKnockoutBlower::apply(KisPainter *painter, KisPaintDeviceSP mergedStyle, const QRect &rect) const
 {
     QReadLocker l(&m_lock);
 
     KIS_SAFE_ASSERT_RECOVER_NOOP(m_knockoutSelection);
 
     painter->setOpacity(OPACITY_OPAQUE_U8);
     painter->setChannelFlags(QBitArray());
     painter->setCompositeOpId(COMPOSITE_COPY);
     painter->setSelection(m_knockoutSelection);
     painter->bitBlt(rect.topLeft(), mergedStyle, rect);
     painter->setSelection(0);
 }
 
 bool KisLayerStyleKnockoutBlower::isEmpty() const
 {
     QReadLocker l(&m_lock);
     return !m_knockoutSelection;
 }