GridIterationTools::PaintDevicePolygonOp Struct Reference

#include <kis_grid_interpolation_tools.h>

Public Member Functions
void	operator() (const QPolygonF &srcPolygon, const QPolygonF &dstPolygon)
void	operator() (const QPolygonF &srcPolygon, const QPolygonF &dstPolygon, const QPolygonF &clipDstPolygon)
	PaintDevicePolygonOp (KisPaintDeviceSP srcDev, KisPaintDeviceSP dstDev)

Public Attributes
KisPaintDeviceSP	m_dstDev
KisPaintDeviceSP	m_srcDev

Detailed Description

Definition at line 165 of file kis_grid_interpolation_tools.h.

Constructor & Destructor Documentation

PaintDevicePolygonOp()

GridIterationTools::PaintDevicePolygonOp::PaintDevicePolygonOp ( KisPaintDeviceSP srcDev, KisPaintDeviceSP dstDev )

inline

Definition at line 167 of file kis_grid_interpolation_tools.h.

        : m_srcDev(srcDev), m_dstDev(dstDev) {}

Member Function Documentation

operator()() [1/2]

void GridIterationTools::PaintDevicePolygonOp::operator() ( const QPolygonF & srcPolygon, const QPolygonF & dstPolygon )

inline

Definition at line 170 of file kis_grid_interpolation_tools.h.

                                                                               {
        this->operator() (srcPolygon, dstPolygon, dstPolygon);
    }

References operator()().

operator()() [2/2]

void GridIterationTools::PaintDevicePolygonOp::operator() ( const QPolygonF & srcPolygon, const QPolygonF & dstPolygon, const QPolygonF & clipDstPolygon )

inline

We need to make sure that the destination polygon is not too small, otherwise even small rounding will send the src-accessor into infinity

Definition at line 174 of file kis_grid_interpolation_tools.h.

                                                                                                                {
        QRect boundRect = clipDstPolygon.boundingRect().toAlignedRect();
        if (boundRect.isEmpty()) return;
 
        KisSequentialIterator dstIt(m_dstDev, boundRect);
        KisRandomSubAccessorSP srcAcc = m_srcDev->createRandomSubAccessor();
 
        KisFourPointInterpolatorBackward interp(srcPolygon, dstPolygon);
 
        if (interp.isValid(0.1)) {
            int y = boundRect.top();
            interp.setY(y);
 
            while (dstIt.nextPixel()) {
                int newY = dstIt.y();
 
                if (y != newY) {
                    y = newY;
                    interp.setY(y);
                }
 
                QPointF srcPoint(dstIt.x(), y);
 
                if (clipDstPolygon.containsPoint(srcPoint, Qt::OddEvenFill)) {
 
                    interp.setX(srcPoint.x());
                    QPointF dstPoint = interp.getValue();
 
                    // brain-blowing part:
                    //
                    // since the interpolator does the inverted
                    // transformation we read data from "dstPoint"
                    // (which is non-transformed) and write it into
                    // "srcPoint" (which is transformed position)
 
                    srcAcc->moveTo(dstPoint);
                    srcAcc->sampledOldRawData(dstIt.rawData());
                }
            }
 
        } else {
            srcAcc->moveTo(interp.fallbackSourcePoint());
 
            while (dstIt.nextPixel()) {
                QPointF srcPoint(dstIt.x(), dstIt.y());
 
                if (clipDstPolygon.containsPoint(srcPoint, Qt::OddEvenFill)) {
                    srcAcc->sampledOldRawData(dstIt.rawData());
                }
            }
        }
 
    }

References KisPaintDevice::createRandomSubAccessor(), dstPoint, interp(), m_dstDev, m_srcDev, KisRandomSubAccessor::moveTo(), KisSequentialIteratorBase< IteratorPolicy, SourcePolicy, ProgressPolicy >::nextPixel(), KisSequentialIteratorBase< IteratorPolicy, SourcePolicy, ProgressPolicy >::rawData(), KisRandomSubAccessor::sampledOldRawData(), KisSequentialIteratorBase< IteratorPolicy, SourcePolicy, ProgressPolicy >::x(), and KisSequentialIteratorBase< IteratorPolicy, SourcePolicy, ProgressPolicy >::y().

Member Data Documentation

m_dstDev

KisPaintDeviceSP GridIterationTools::PaintDevicePolygonOp::m_dstDev

Definition at line 234 of file kis_grid_interpolation_tools.h.

m_srcDev

KisPaintDeviceSP GridIterationTools::PaintDevicePolygonOp::m_srcDev

Definition at line 233 of file kis_grid_interpolation_tools.h.

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The documentation for this struct was generated from the following file:

• libs/image/kis_grid_interpolation_tools.h