File indexing completed on 2024-05-12 15:58:39

 /*
  *  This file is part of the KDE project
  *
  *  SPDX-FileCopyrightText: 2006 Cyrille Berger <cberger@cberger.net>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include "kis_random_sub_accessor.h"
 #include <QtGlobal>
 
 #include <KoColorSpace.h>
 #include <KoMixColorsOp.h>
 #include <QtMath>
 
 #include "kis_paint_device.h"
 
 KisRandomSubAccessor::KisRandomSubAccessor(KisPaintDeviceSP device)
         : m_device(device)
         , m_currentPoint(0, 0)
         , m_randomAccessor(device->createRandomConstAccessorNG())
 {
 }
 
 
 KisRandomSubAccessor::~KisRandomSubAccessor()
 {
 }
 
 
 void KisRandomSubAccessor::sampledOldRawData(quint8* dst)
 {
     const quint8* pixels[4];
     qint16 weights[4];
     int x = qFloor(m_currentPoint.x());
     int y = qFloor(m_currentPoint.y());
 
     double hsub = m_currentPoint.x() - x;
     if (hsub < 0.0) {
         hsub = 1.0 + hsub;
     }
     double vsub = m_currentPoint.y() - y;
     if (vsub < 0.0) {
         vsub = 1.0 + vsub;
     }
     
     int sumOfWeights = 0;
 
     weights[0] = qRound((1.0 - hsub) * (1.0 - vsub) * 255);
     sumOfWeights += weights[0];
     m_randomAccessor->moveTo(x, y);
     pixels[0] = m_randomAccessor->oldRawData();
     weights[1] = qRound((1.0 - vsub) * hsub * 255);
     sumOfWeights += weights[1];
     m_randomAccessor->moveTo(x + 1, y);
     pixels[1] = m_randomAccessor->oldRawData();
     weights[2] = qRound(vsub * (1.0 - hsub) * 255);
     sumOfWeights += weights[2];
     m_randomAccessor->moveTo(x, y + 1);
     pixels[2] = m_randomAccessor->oldRawData();
     weights[3] = qRound(hsub * vsub * 255);
     sumOfWeights += weights[3];
     m_randomAccessor->moveTo(x + 1, y + 1);
     pixels[3] = m_randomAccessor->oldRawData();
 
     m_device->colorSpace()->mixColorsOp()->mixColors(pixels, weights, 4, dst, sumOfWeights);
 }
 
 
 void KisRandomSubAccessor::sampledRawData(quint8* dst)
 {
     const quint8* pixels[4];
     qint16 weights[4];
     int x = qFloor(m_currentPoint.x());
     int y = qFloor(m_currentPoint.y());
 
     double hsub = m_currentPoint.x() - x;
     if (hsub < 0.0) {
         hsub = 1.0 + hsub;
     }
     double vsub = m_currentPoint.y() - y;
     if (vsub < 0.0) {
         vsub = 1.0 + vsub;
     }
     
     int sumOfWeights = 0;
 
     weights[0] = qRound((1.0 - hsub) * (1.0 - vsub) * 255);
     sumOfWeights += weights[0];
     m_randomAccessor->moveTo(x, y);
     pixels[0] = m_randomAccessor->rawDataConst();
     weights[1] = qRound((1.0 - vsub) * hsub * 255);
     sumOfWeights += weights[1];
     m_randomAccessor->moveTo(x + 1, y);
     pixels[1] = m_randomAccessor->rawDataConst();
     weights[2] = qRound(vsub * (1.0 - hsub) * 255);
     sumOfWeights += weights[2];
     m_randomAccessor->moveTo(x, y + 1);
     pixels[2] = m_randomAccessor->rawDataConst();
     weights[3] = qRound(hsub * vsub * 255);
     sumOfWeights += weights[3];
     m_randomAccessor->moveTo(x + 1, y + 1);
     pixels[3] = m_randomAccessor->rawDataConst();
     m_device->colorSpace()->mixColorsOp()->mixColors(pixels, weights, 4, dst, sumOfWeights);
 }