kis_boundary.cc

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/*
 *  SPDX-FileCopyrightText: 2005 Bart Coppens <kde@bartcoppens.be>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#include "kis_boundary.h"
#include <QPainter>
#include <QPainterPath>
#include <QPen>
 
#include "KoColorSpace.h"
#include "kis_fixed_paint_device.h"
#include "kis_outline_generator.h"
 
struct KisBoundary::Private {
    KisFixedPaintDeviceSP m_device;
    QVector<QPolygon> m_boundary;
    QPainterPath path;
};
 
KisBoundary::KisBoundary(KisFixedPaintDeviceSP dev) : d(new Private)
{
    d->m_device = dev;
}
 
KisBoundary::~KisBoundary()
{
    delete d;
}
 
void KisBoundary::generateBoundary()
{
    if (!d->m_device)
        return;
 
    KisOutlineGenerator generator(d->m_device->colorSpace(), OPACITY_TRANSPARENT_U8);
    generator.setSimpleOutline(true);
    d->m_boundary = generator.outline(d->m_device->data(), 0, 0, d->m_device->bounds().width(), d->m_device->bounds().height());
 
    d->path = QPainterPath();
    Q_FOREACH (const QPolygon & polygon, d->m_boundary) {
        d->path.addPolygon(polygon);
        d->path.closeSubpath();
    }
 
}
 
void KisBoundary::paint(QPainter& painter) const
{
    QPen pen;
    pen.setWidth(0);
    pen.setBrush(Qt::black);
    painter.setPen(pen);
 
    Q_FOREACH (const QPolygon & polygon, d->m_boundary) {
        painter.drawPolygon(polygon);
    }
}
 
QPainterPath KisBoundary::path() const
{
    return d->path;
}